Closed-loop control gas heater based on wide-range oxygen sensor

Abstract

The invention discloses a closed-loop control gas heater based on a wide-range oxygen sensor. The gas heater comprises a burner, wherein a mixing core and a mixing cylinder which are connected with each other are arranged in the burner; a fan assembly is mounted at one end of the burner and comprises a fan motor, and an air-throwing disk is arranged at a position, in the burner, of the output endof the fan motor; a spray rail assembly is arranged on the burner and comprises a gas nozzle; a flame ion sensor and an ignition needle are arranged at the other end of the burner, and the ignition needle is connected with the output end of an ignition driver; and the end, where the ignition needle is located, of the burner is fixedly connected with a heat exchange water jacket, a waste gas diversion cylinder is arranged in the heat exchange water jacket, an exhaust pipe which extends to the outside in a penetrating mode is arranged on the side wall of the water jacket water jacket, and the wide-range oxygen sensor is arranged on the exhaust pipe. Through the gas heater, the problem that in the prior art, the adjustability of automobile gas heating is insufficient can be solved, adjustmentis rapid, the automatic degree is high, and burning economy is good.

Description

technical field [0001] The invention relates to an automobile gas heater, in particular to a gas heater based on closed-loop control of a wide-area oxygen sensor. Background technique [0002] As people pay more and more attention to environmental protection, higher requirements are put forward for the exhaust gas emission of heaters. Generally, when the heater burns equivalently, the exhaust gas emission is the lowest and the fuel is the most economical. The traditional gas heater control scheme is based on the Venturi mixing principle. The amount of gas supply depends on the initial data such as the size parameters of the Venturi mixer, the air flow rate, the spring pressure of the pressure reducer, and the initial flow rate of the pressure reducer. When the fan speed, air density or spring pressure of the pressure reducer changes, the equivalent combustion state will continue to be maintained, causing the air-fuel ratio to deviate from the ideal air-fuel ratio, thereby c...

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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a gas heater based on closed-loop control of a wide-area oxygen sensor that can solve the problem of insufficient adjustability of automobile gas heating in the prior art

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