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Relay driving circuit and air conditioner

A technology for driving circuits and relays, applied in relays, circuits, electrical components, etc., can solve problems such as energy waste, increase the total amount of heat generated by the circuit, and affect the service life of the device, so as to improve stability, reduce driving power consumption, and prolong use. effect of life

Active Publication Date: 2019-04-02
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) Since the driving voltage after the relay is powered on and started does not need to reach the rated voltage, when the rated voltage is used to drive the relay to operate, the drive power consumption will be increased, resulting in energy waste
[0004] (2) Since the heating of the relay will increase the total heat generation of the circuit, it will affect the service life of the devices in the circuit

Method used

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  • Relay driving circuit and air conditioner
  • Relay driving circuit and air conditioner
  • Relay driving circuit and air conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Such as figure 1 As shown, the relay RY1 drive circuit according to an embodiment of the present invention includes: a drive control module (not shown in the figure) for outputting a pulse drive signal; a switch module Q1, the controlled end of which is connected to the drive The control module is used to receive the pulse drive signal. The output terminal of the switch module Q1 is connected to the relay RY1 through the series filter inductor L1. After the relay RY1 completes the closing action according to the received conduction signal, the pulse drive signal controls the switch module Q1 to turn off. Turn on or conduct to realize the pulse driving control of the relay RY1, the filter inductor L1 is used to filter the electromagnetic interference of the pulse driving control, and the duty cycle of the pulse driving signal is determined according to the release voltage of the relay RY1.

[0060] In this embodiment, after the relay RY1 completes the closing action, it ...

Embodiment 2

[0078] Such as figure 2 As shown, in any one of the above embodiments, preferably, the pulse driving signal is a low-frequency pulse driving signal.

[0079] In this embodiment, when the distance between the switch module Q1 and the relay RY1 is relatively long, the filter inductance L1 is connected in series with the relay RY1, while reducing the electromagnetic interference of the pulse drive, the relay RY1 is driven by a low-frequency pulse drive signal to reduce the The driving loss of the switching module Q1 is reduced.

[0080] Among them, those skilled in the art can understand that the pulse signal with a frequency in the range of 50-300 Hz can be determined as a low-frequency pulse driving signal, and the pulse signal with a frequency in the range of 0.1 KHz-500 KHz can be determined as a high-frequency pulse signal.

[0081] In any of the above embodiments, preferably, the frequency of the low-frequency pulse drive signal is determined according to the inductance o...

Embodiment 3

[0084] Such as image 3 As shown, in any one of the above embodiments, preferably, the pulse driving signal is a variable frequency pulse driving signal, and the frequency of the variable frequency pulse driving signal changes within a preset fluctuation range.

[0085] In this embodiment, when the distance between the switch module Q1 and the relay RY1 is relatively long, the relay RY1 can also be driven by variable frequency drive, and the relay RY1 can be driven by a variable frequency pulse drive signal, which is beneficial to improve the reliability of the drive.

[0086] Specifically, fw is used to represent the center frequency of the frequency-variable pulse drive signal, and fs is used to represent the range of frequency change, then the drive frequency of the variable-frequency pulse drive signal is driven by changing between fw-fs and fw+fs, wherein the frequency change speed is The jitter frequency is determined according to the results of the EMC test.

[0087] A...

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Abstract

The invention provides a relay driving circuit and an air conditioner. The relay driving circuit comprises a driving control module for outputting a pulse driving signal; and a switch module, whereinthe controlled end of the switch module is connected to the driving control module to receive the pulse driving signal, and the output end of the switch module is connected to a relay through a filterinductor connected in series. After the relay is closed according to a received turn-on signal, the switch module is turned off or on by the pulse drive signal to implement pulse driving control on the relay. The filter inductor is configured to filter out the electromagnetic interference of the pulse driving control. The duty ratio of the pulse driving signal is determined according to the release voltage of the relay. The technical solution of the present invention contributes to extending the off time of the switch module, that is, reducing the duty ratio of the pulse driving signal, thereby contributing to further reducing the driving power consumption of the relay and prolonging the service lives of the devices in a driving circuit.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to a relay drive circuit and an air conditioner. Background technique [0002] In the related art, when the relay in the air conditioner is driven, after the rated voltage is used to power on and start the relay, the rated voltage is still used to drive the relay, resulting in the following defects: [0003] (1) Since the driving voltage after the relay is powered on and started does not need to reach the rated voltage, when the rated voltage is used to drive the relay to operate, the drive power consumption will be increased, resulting in energy waste. [0004] (2) Since the heating of the relay will increase the total heat generation of the circuit, it will affect the service life of the devices in the circuit. Contents of the invention [0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. [0006] Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/02F24F11/88
CPCF24F11/88H01H47/02
Inventor 霍兆镜
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD