Automatic cut-off temperature adjusting device for truck air conditioner temperature controller

Abstract

The invention discloses an automatic cut-off temperature adjusting device for a temperature controller of an air conditioner of a truck. The main design concept of the device is that a temperature acquisition circuit, a logic operation circuit, a load resistance switching circuit and a temperature controller for pre-calibrating a corresponding relation between an input load resistance value and a cut-off temperature construct a cut-off temperature self-adaptive adjustment mechanism of the temperature controller of the truck air conditioner, specifically, according to the acquired different environment temperatures, the temperature acquisition circuit outputs corresponding electric signals to the logic operation circuit, the logic operation circuit controls the load resistance switching circuit to convert different load resistors according to a preset logic rule and in combination with the electric signals input by the temperature acquisition circuit, and the temperature controller changes different preset cut-off temperatures according to the input load resistors. The cut-off temperature of the temperature controller is automatically adjusted through the environment temperature, the starting frequency of a compressor can be reduced under the condition that the environment temperature is low, and therefore the energy consumption of the truck air conditioner can be remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted air conditioners, in particular to an automatic cut-off temperature adjustment device for a truck air conditioner thermostat. Background technique [0002] The working method of the truck air conditioning system is that when the power switch is turned on, the windshield switch, and the AC switch are turned on, the condenser fan and compressor will work, and the refrigerant (R134a) will flow through the refrigerant circulation of the evaporation core in the air box, and then pass through the compressor, condenser, The low-temperature liquid refrigerant formed by the action of the throttling tube and the like absorbs the heat of the surrounding air to achieve refrigeration. [0003] The existing truck air conditioning control system is mainly composed of power control circuit, blower control circuit, electromagnetic clutch control circuit, temperature control circuit and other parts, among w...

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Problems solved by technology

[0004] And the existing air-conditioning thermostat controls the opening and cutting of the air-conditioning by a fixed temperature value (this temperature value is called the cut-off temperature in the present invention), and when the ambient temperature is low, if the thermostat adopts the same cut-off temperature High temperature will cause the compressor to be cut off frequently, resulting in the consumption of cooling capacity and the increase of engine oil consumption

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