Four-way valve driving circuit and air conditioner

Abstract

The invention discloses a four-way valve driving circuit and an air conditioner. The circuit comprises: a positive polarity power switch driving circuit, which works when receiving a first control signal, and outputs a positive polarity switch driving signal; a negative polarity power switch driving circuit, Work when receiving the second control signal, and output the negative polarity switch drive signal; H-bridge switch circuit, including the first bridge arm circuit and the second bridge arm circuit, when receiving the positive polarity switch drive signal, the first bridge arm The switch of the upper bridge arm of the circuit works, and drives the switch of the lower bridge arm of the second bridge arm circuit to conduct when it is turned on, so as to output the connected positive polarity drive power to the DC four-way valve; and, when receiving the negative polarity When switching the driving signal, the upper bridge arm switch of the second bridge arm circuit works, and drives the lower bridge arm switch of the first bridge arm circuit to conduct when it is turned on, so as to output the connected negative polarity drive power to the DC four-way valve. The invention simplifies the driving circuit of the four-way valve and improves the driving efficiency of the four-way valve.

Description

technical field [0001] The invention relates to the technical field of four-way valve driving, in particular to a four-way valve driving circuit and an air conditioner. Background technique [0002] At present, most of the DC four-way valves are driven by H-bridge drive circuits or relays. The four switch tubes in the H-bridge circuit need to be equipped with four control signals. There are many control signals and complex logic. The driver chip is used to realize the dead time of the turn-on and turn-off of the upper tube or the lower tube. The cost of the driver chip is relatively high, and it is easy to complicate the circuit design of the control board. Contents of the invention [0003] The main purpose of the present invention is to propose a four-way valve driving circuit and an air conditioner, aiming at simplifying the driving circuit of the four-way valve, improving the driving efficiency of the four-way valve, and realizing self-maintenance of the state of the f...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the DC four-way valves are driven by H-bridge drive circuits or relays. The four switch tubes in the H-bridge circuit need to be equipped with four control signals. There are many control signals and complex logic. The driver chip is used to realize the dead time of the turn-on and turn-off of the upper tube or the lower tube. The cost of the driver chip is relatively high, and it is easy to complicate the circuit design of the control board.

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