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A rail vehicle emergency ventilation control circuit

A technology for controlling circuits and rail vehicles, which is applied in the heating/cooling of railway vehicles, railway car body parts, transportation and packaging, etc. It can solve the problems of fan starting torque reduction, life reduction, and motor temperature rise increase, etc., to ensure Effects of personal safety, improved comfort, and extended service life

Active Publication Date: 2017-06-09
石家庄国祥运输设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the emergency mode of the vehicle, since the voltage input from the emergency ventilation inverter to the speed-regulating transformer is low, if it is set to low-speed mode, the voltage finally sent to the blower will become smaller after the transformer is stepped down, causing the driver The air supply volume of the room is seriously reduced, which affects the comfort. At the same time, the excessive voltage drop causes the starting torque of the fan to drop. In serious cases, the motor torque is not enough and it will not work
Since the fan is an inductive load, it runs in a locked rotor for a long time, and the current rises, which causes the temperature rise of the motor to increase and the service life to decrease
[0003] In addition, in the emergency mode of the vehicle, the emergency ventilation inverter is activated and provides single-phase 220VAC power supply to the input side of the speed-regulating transformer of the driver's cab air conditioner. Since the input / output voltage of the speed-regulating transformer is in a fixed ratio, the transformer's The voltage of the high and low speed output points will drop to 98.4VAC (170*220 / 380) and 57.9VAC (100*220 / 380) respectively, and the minimum starting torque voltage of the blower is 70VAC. It can be seen that the transformer in emergency mode The low-speed voltage of 57.9VAC cannot meet the normal operation requirements of the fan
Moreover, when the vehicle is running on the main line, the driver's main energy is to operate the vehicle to drive normally. When the vehicle enters the catenary power outage area, that is, the emergency mode, if the wind speed knob switch is placed in the low gear, the driver will not manually turn the knob switch to High-speed gear, which will cause the air conditioner fan in the driver's cab to fail to operate normally

Method used

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  • A rail vehicle emergency ventilation control circuit
  • A rail vehicle emergency ventilation control circuit
  • A rail vehicle emergency ventilation control circuit

Examples

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Embodiment 1

[0018] Embodiment one: see attached figure 1 , the present invention provides a rail vehicle emergency ventilation control circuit, including a speed-regulating transformer 1 connected to a 380V power supply system and an emergency power supply system, a blower 2, and a wind speed knob switch 3 connected to the speed-regulating transformer 1 and the blower 2, the key of which is : a first switch 4 and a second switch 5 are also arranged between the speed regulating transformer 1 and the wind speed knob switch 3, the low voltage output end of the speed regulating transformer 1 is connected with the low voltage input end of the wind speed knob switch 3 by means of the first switch 4, and the high voltage The output terminal is connected to the high-voltage input terminal of the wind speed knob switch 3, and the terminal of the second switch 5 is respectively connected to the high-voltage output terminal of the speed regulating transformer 1 and the output terminal of the wind spe...

Embodiment 2

[0023] Embodiment two: attach figure 2 It is the schematic circuit diagram of the second embodiment of the present invention. The difference from the first embodiment is that the interlocking device adopts a mechanical structure to achieve the purpose of interlocking the first switch 4 and the second switch 5 .

[0024] First embodiment of interlocking device: see attached image 3, the interlocking device includes a gear 9 set in the box body 8 and driven by a motor controlled by the control circuit of the emergency power supply system, and a conduction rack meshed with the gear 9 and slidingly limited in the box body 8 by means of a slide rail 10 11. The first switch 4 and the second switch 5 are arranged in the box body 8 and are respectively located on both ends of the conduction rack 11, and are provided between the conduction rack 11 and the inner wall of the box body 8 on the side of the first switch 4. Extension spring 13, conduction rack 11 is by extension spring 13...

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Abstract

The invention provides an emergency ventilation control circuit for rail vehicles, which relates to the technical field of air-conditioning equipment for rail vehicles, including a speed-regulating transformer connected to a 380V power supply system and an emergency power supply system, a blower connected to the speed-regulating transformer, and a speed-regulating The key of the wind speed knob switch between the output end of the transformer and the input end of the blower is that a first switch and a second switch are arranged between the speed regulating transformer and the blower, and the low voltage input end of the wind speed knob switch is connected with the low voltage of the speed regulating transformer. The output end is connected, the high-voltage input end is connected with the high-voltage output end of the speed-regulating transformer, the terminal of the second switch is respectively connected with the high-voltage output end of the speed-regulating transformer and the output end of the wind speed knob switch, and the first switch and the second switch are provided. There is an interlock. The beneficial effects of the invention are: under the low-voltage power supply in the emergency mode of the vehicle, the blower of the air conditioner in the driver's cab is forced to run at the highest wind speed, which improves the comfort.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment for rail transit vehicles, in particular to a control circuit for preventing the blower from not operating when the air conditioner is in a low-speed gear under the low-voltage power supply condition of the vehicle in emergency mode. Background technique [0002] At present, the air conditioning system for rail transit vehicles, especially for the driver’s cab air conditioner equipped with air volume adjustment function and adopts variable voltage speed regulation control, when it is running under the normal power supply (alternating current) state of the vehicle, the driver’s cab air conditioner can be controlled by the wind speed knob switch. Adjust the high and low speed of the air outlet wind speed of the indoor air conditioner. When the vehicle enters the catenary power-free area or the main power supply system of the vehicle for the air conditioner fails, it will not be ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61D27/00
Inventor 李潇李海云白东燕
Owner 石家庄国祥运输设备有限公司