Energy feedback device for elevator

Abstract

The present invention discloses an energy feedback device for an elevator, including a power supply circuit. The traction machine charges the power supply circuit through a frequency converter. The power supply circuit supplies power to external electrical components. The power supply circuit includes a first transmission circuit and a second transmission circuit. The first transmission circuit and the second transmission circuit can supply power to the external electrical components respectively. When there is no power outage, only the first transmission circuit supplies power to the external electrical components. When there is a power outage and the power of the first transmission circuit is used up, the power supply is switched to the second transmission circuit. In the present invention, the first transmission circuit and the second transmission circuit can supply power to the external electrical components respectively. When there is no power outage, only the first transmission circuit supplies power to the external electrical components. When there is a power outage, the power supply is switched to the second transmission circuit, so as to ensure that the power can continue to be provided to the external electrical components for a long time when the power is cut off.

Description

Technical Field

[0001] The invention belongs to the technical field of elevators, and in particular relates to an energy feedback device for elevators. Background Art

[0002] Since all elevators are equipped with a counterweight, the weight of the counterweight is approximately the weight of the car plus half of the rated load. When the elevator is lightly loaded upward or heavily loaded downward, the traction machine is in a generating state (braking), which is manifested as an increase in the DC bus voltage of the inverter.

[0003] In the existing technology, the braking energy of the elevator is stored in the battery pack, which can supply power to the elevator, so as to make full use of the energy. However, usually only one battery pack is provided. When a power outage occurs, if the battery pack is in a low power state, it cannot supply power to the items in the elevator and cannot continue to operate the necessary parts. In addition, the existing device is also relatively power-consuming. Summary of the invention

[0004] The object of the present invention is to provide an energy feedback device for an elevator, which can ensure that electricity can continue to be provided to necessary components for a long time when power is cut off.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an energy feedback device for an elevator, comprising a power supply circuit, the traction machine charges the power supply circuit through a frequency converter, the power supply circuit supplies power to external electrical components, the power supply circuit comprises a first transmission circuit and a second transmission circuit, the first transmission circuit and the second transmission circuit can supply power to the external electrical components respectively, when there is no power outage, only the first transmission circuit supplies power to the external electrical components, when a power outage occurs and the power of the first transmission circuit is used up, the power is switched to the second transmission circuit.

[0006] Furthermore, the first transmission circuit includes:

[0007] A first power storage module, the first power storage module can store the electricity generated by the traction machine through the inverter;

[0008] An inverter module converts the electricity of the first power storage module into alternating current for use by external power-consuming components;

[0009] A power switching module, the power switching module is connected to the inverter module and the power grid, and when the power of the first power storage module is low, the power is switched to the power grid, and when the power of the first power storage module is high, the power is switched to the first power storage module;

[0010] Normally closed switch K3-1, the normally closed switch K3-1 is connected between the power switching module and the external electrical components;

[0011] Coil KM2, the coil KM2 is connected between the power switching module and the external electrical components;

[0012] The second transmission circuit comprises:

[0013] A second power storage module, the second power storage module can store the electricity generated by the traction machine through the inverter;

[0014] An inverter module converts the electricity of the second power storage module into alternating current for use by external power-consuming components;

[0015] Normally closed switch K2-1, which is connected between the inverter module and external electrical components;

[0016] Coil KM3, coil KM3 is connected between the power switching module and the external electrical components.

[0017] Furthermore, the external electrical components include essential components and non-essential components.

[0018] Further, the positive pole of the output terminal of the power supply circuit is connected to the first end of the necessary component one, the second end of the necessary component one is connected to the first end of the coil KM1, the second end of the coil KM1 is connected to the negative pole of the output terminal of the power supply circuit, the first end of the normally closed switch K1-1 is connected to the positive pole of the output terminal of the power supply circuit, the second end of the normally closed switch K1-1 is connected to the first end of the necessary component two, the second end of the necessary component two is connected to the negative pole of the output terminal of the power supply circuit, the first end of the normally closed switch K3-1 is connected to the positive pole of the output terminal of the power supply circuit, the second end of the normally closed switch K3-1 is connected to the first end of the non-essential component, and the second end of the non-essential component is connected to the negative pole of the output terminal of the power supply circuit.

[0019] Furthermore, the first end of the K weight switch is connected to the positive pole of the output end of the power supply circuit, the second end of the K weight switch is connected to the first end of the delay coil KT, the second end of the delay coil KT is connected to the negative pole of the output end of the power supply circuit, and the delay normally closed switch KT-1 is connected between the normally closed switch K3-1 and non-essential components.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The first transmission circuit and the second transmission circuit can supply power to external electrical components respectively. When there is no power outage, only the first transmission circuit supplies power to the external electrical components. When there is a power outage, the power supply is switched to the second transmission circuit to ensure that the external electrical components can continue to be supplied with power for a long time when the power is cut off;

[0022] (2) When a power outage occurs, the second transmission device supplies power to essential components, and non-essential components are billboards, etc. When a power outage occurs, the second transmission device does not supply power to non-essential components, slowing down the speed at which the power of the second power storage module is reduced;

[0023] (3) When an essential component, such as a light bulb or fan, breaks down, coil KM1 loses power, the normally closed switch K1-1 becomes energized, and the spare essential components are turned on, so there is no need to stop the elevator for maintenance immediately, making it easier for maintenance personnel to arrange time for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the energy feedback device for elevator of the present invention;

[0025] Figure 2 It is a structural schematic diagram of an embodiment;

[0026] Figure 3 It is a schematic structural diagram of another embodiment. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 3 The present invention provides a technical solution for an energy feedback device for an elevator.

[0029] An energy feedback device for an elevator comprises a power supply circuit. A traction machine charges the power supply circuit through a frequency converter, and the power supply circuit then supplies power to external electrical components.

[0030] The power supply circuit includes a first transmission circuit and a second transmission circuit. The first transmission circuit and the second transmission circuit can respectively supply power to external electrical components. When there is no power outage, only the first transmission circuit supplies power to the external electrical components. When a power outage occurs and the power of the first transmission circuit is used up, the power supply is switched to the second transmission circuit.

[0031] The first transmission circuit comprises:

[0032] A first power storage module, the first power storage module can store the electricity generated by the traction machine through the inverter;

[0033] An inverter module converts the electricity of the first power storage module into alternating current for use by external power-consuming components;

[0034] A power switching module, the power switching module is connected to the inverter module and the power grid, and when the power of the first power storage module is low, the power is switched to the power grid, and when the power of the first power storage module is high, the power is switched to the first power storage module;

[0035] Normally closed switch K3-1, the normally closed switch K3-1 is connected between the power switching module and the external electrical components;

[0036] Coil KM2, coil KM2 is connected between the power switching module and the external electrical components.

[0037] The second transmission circuit comprises:

[0038] A second power storage module, the second power storage module can store the electricity generated by the traction machine through the inverter;

[0039] An inverter module converts the electricity of the second power storage module into alternating current for use by external power-consuming components;

[0040] Normally closed switch K2-1, which is connected between the inverter module and external electrical components;

[0041] Coil KM3, coil KM3 is connected between the power switching module and the external electrical components.

[0042] External power-consuming components include essential components and non-essential components. Essential components include light bulbs, fans, emergency buttons, etc. When a power outage occurs, the second transmission device supplies power to the essential components. Non-essential components include billboards, etc. When a power outage occurs, the second transmission device does not supply power to the non-essential components.

[0043] like Figure 2 As shown, it is a circuit diagram of a power supply circuit supplying power to an external electrical component, the positive pole of the output terminal of the power supply circuit is connected to the first end of the necessary component one, the second end of the necessary component one is connected to the first end of the coil KM1, the second end of the coil KM1 is connected to the negative pole of the output terminal of the power supply circuit, the first end of the normally closed switch K1-1 is connected to the positive pole of the output terminal of the power supply circuit, the second end of the normally closed switch K1-1 is connected to the first end of the necessary component two, the second end of the necessary component two is connected to the negative pole of the output terminal of the power supply circuit, the first end of the normally closed switch K3-1 is connected to the positive pole of the output terminal of the power supply circuit, the second end of the normally closed switch K3-1 is connected to the first end of the non-essential component, and the second end of the non-essential component is connected to the negative pole of the output terminal of the power supply circuit.

[0044] The first transmission circuit and the second transmission circuit of the power supply circuit independently supply power to external electrical components. When the power grid is supplying power normally, the first transmission circuit (the first power storage module or the power grid) supplies power to necessary components and non-essential components normally, the coil KM1 is energized, the normally closed switch K1-1 is opened, and the necessary component 2 is not energized. The coil KM2 is energized, and the normally closed switch K2-1 is opened, so that when the first transmission circuit is energized, the second transmission circuit is de-energized.

[0045] When an essential component, such as a light bulb or a fan, breaks down, coil KM1 loses power, the normally closed switch K1-1 becomes energized, and the spare essential components are turned on, so there is no need to stop the elevator for maintenance immediately, which is convenient for passengers and maintenance personnel and makes it easier for maintenance personnel to arrange time for maintenance.

[0046] When a power outage occurs and the power of the first power storage module is used up, the coil KM2 loses power, the normally closed switch K2-1 opens, and the second power storage module supplies power to the external power-consuming components. At this time, the coil KM3 is energized, the normally closed switch K3-1 opens, and the non-essential components lose power, thereby reducing the power loss of the second power storage module.

[0047] like Figure 3 This is a schematic diagram of another embodiment of the present invention, in which the first end of the K weight switch is connected to the positive output terminal of the power supply circuit, the second end of the K weight switch is connected to the first end of the delay coil KT, the second end of the delay coil KT is connected to the negative output terminal of the power supply circuit, and the delay normally closed switch KT-1 is connected between the normally closed switch K3-1 and non-essential components.

[0048] When the weight sensor in the elevator car detects that there is weight in the car, it is assumed that there is someone in the car, the K weight switch is closed, the delay coil KT is energized, and non-essential components such as advertisements are played normally. When all the people in the car have left, the K weight switch is opened. At this time, no one has entered the car within the delay time T seconds (because when the door is opened, there may be someone entering the car after someone goes out), the delay normally closed switch KT-1 is opened, and the advertisement is turned off, thereby saving electricity. Advertisements are only played when there are people in the car.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy feedback device for an elevator, characterized in that: The power supply circuit includes a power supply circuit, the traction machine charges the power supply circuit through a frequency converter, the power supply circuit supplies power to external power-consuming components, the power supply circuit includes a first transmission circuit and a second transmission circuit, the first transmission circuit and the second transmission circuit can supply power to the external power-consuming components respectively, when there is no power outage, only the first transmission circuit supplies power to the external power-consuming components, when there is a power outage and the power of the first transmission circuit is used up, the power supply is switched to the second transmission circuit; The first transmission circuit comprises: A first power storage module, the first power storage module can store the electricity generated by the traction machine through the inverter; An inverter module converts the electricity of the first power storage module into alternating current for use by external power-consuming components; A power switching module, the power switching module is connected to the inverter module and the power grid, and when the power of the first power storage module is low, the power is switched to the power grid, and when the power of the first power storage module is high, the power is switched to the first power storage module; Normally closed switch K3-1, the normally closed switch K3-1 is connected between the power switching module and the external electrical components; Coil KM2, the coil KM2 is connected between the power switching module and the external electrical components; The second transmission circuit comprises: A second power storage module, the second power storage module can store the electricity generated by the traction machine through the inverter; An inverter module converts the electricity of the second power storage module into alternating current for use by external power-consuming components; Normally closed switch K2-1, which is connected between the inverter module and external electrical components; Coil KM3, coil KM3 is connected between the power switching module and the external electrical components; External electrical components include essential components and non-essential components; The positive pole of the output terminal of the power supply circuit is connected to the first end of the essential component one, the second end of the essential component one is connected to the first end of the coil KM1, the second end of the coil KM1 is connected to the negative pole of the output terminal of the power supply circuit, the first end of the normally closed switch K1-1 is connected to the positive pole of the output terminal of the power supply circuit, the second end of the normally closed switch K1-1 is connected to the first end of the essential component two, the second end of the essential component two is connected to the negative pole of the output terminal of the power supply circuit, the first end of the normally closed switch K3-1 is connected to the positive pole of the output terminal of the power supply circuit, the second end of the normally closed switch K3-1 is connected to the first end of the non-essential component, and the second end of the non-essential component is connected to the negative pole of the output terminal of the power supply circuit; When a necessary component breaks down, coil KM1 loses power, normally closed switch K1-1 becomes energized, and the spare necessary component opens; The first end of the K weight switch is connected to the positive electrode of the output end of the power supply circuit, the second end of the K weight switch is connected to the first end of the delay coil KT, the second end of the delay coil KT is connected to the negative electrode of the output end of the power supply circuit, and the delay normally closed switch KT-1 is connected between the normally closed switch K3-1 and the non-essential components; When the weight sensor in the elevator car detects that there is weight in the car, it is assumed that there is someone in the car, the K weight switch is closed, the delay coil KT is energized, and the non-essential parts advertisement plays normally. When all the people in the car have left, the K weight switch is opened. At this time, no one enters the car within the delay time T seconds, the delay normally closed switch KT-1 is opened, and the advertisement is closed.

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