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Power-on protection method and device for contactor

A technology for protection devices and contactors, applied in circuits, relays, electrical components, etc., can solve problems such as coil heating, contactor coil burnout, and easy freezing

Active Publication Date: 2017-06-30
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As we all know, the application environment of refrigeration equipment, such as air conditioners, is complex. When the air conditioner is used in a low temperature and humid environment, the electric control elements (such as contactors) on the outdoor unit are easy to freeze, resulting in Bad; and, when the outdoor unit of the air conditioner is running and condensing, due to the low temperature, the electric control elements (such as contactors) on the outdoor unit are also prone to ice
If the contacts of the contactor are blocked by ice or ice, when the contactor is powered on, the contacts of the contactor will not be able to pull in normally. At this time, the current will continue to act on the coil inside the contactor, causing the coil to heat up. , if the contactor is not controlled to disconnect in a short time, the coil of the contactor will be burned

Method used

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  • Power-on protection method and device for contactor
  • Power-on protection method and device for contactor
  • Power-on protection method and device for contactor

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Embodiment Construction

[0044] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] In the present invention, the input end of the contactor is used to connect to the alternating current, and the output end is used to connect with the load, and the contacts of the contactor are attracted or disconnected to control the load to be powered on or off.

[0046] refer to figure 1 , figure 1 It is a schematic flow chart of the first embodiment of the power-on protection method of the contactor of the present invention; figure 1 As shown, the power-on protection method of the contactor in this embodiment includes the following steps:

[0047] Step S10, when receiving an instruction to power on the contactor, acquire the ambient temperature of the contactor.

[0048] The periphery of the contactor is provided with a temperature sensor to detect the ambient temperature of the contactor. For example,...

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PUM

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Abstract

The invention discloses a power-on protection method for a contactor. The method includes acquiring the ambient temperature when receiving an instruction to power on the contactor; and controlling the The contactor performs an anti-icing action; when the ambient temperature is greater than the first preset temperature, the contactor is controlled to enter a normal working state. The invention also discloses a power-on protection device for the contactor. The invention realizes the purpose of protecting the contactor when it is powered on, can prevent the contactor from being burned, and reduces equipment maintenance at a later stage.

Description

technical field [0001] The invention relates to the field of refrigeration equipment, in particular to a method and device for power-on protection of a contactor. Background technique [0002] A contactor (Magnetic Contactor) is an electrical appliance that uses a coil to flow current to generate a magnetic field to close the contacts to control the load. The contactor has a large control capacity and is suitable for frequent operation and long-distance control. It is one of the important components in the automatic control system. Because it can quickly cut off the AC and DC main circuits and can frequently switch on and control large current (some types up to 800 amps), it is mainly used in electric control equipment with motors, such as refrigeration Device power-on control. [0003] As we all know, the application environment of refrigeration equipment, such as air conditioners, is complex. When the air conditioner is used in a low temperature and humid environment, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H47/02
Inventor 洪伟鸿
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD