PTC assembly with alarming and automatic air volume adjusting functions

Abstract

The invention provides a PTC assembly with alarming and automatic air volume adjusting functions. The PTC assembly is characterized in that a PTC core body, a fan, a direct-current contactor, a direct-current relay and a temperature control switch are arranged in a shell, the contacts of the direct-current relay are respectively connected with a first power supply and the fan, the PTC control signal output end of an air conditioner controller is connected with the coil input ends of the direct-current relay and the direct-current contactor, the coil output ends of the direct-current relay andthe direct-current contactor are jointly connected to the negative electrode of the fan, the PWM speed regulation signal output end of an automobile air conditioner is connected with the PWM signal receiving end of the fan, the contact of the direct-current contactor is connected with the positive electrode of a second power supply and one end of the PTC core body, the other end of the PTC core body is connected with the negative electrode of the second power supply, one end of the temperature control switch is connected with the PTC detection wire inlet end of the air conditioner controller,and the other end of the temperature control switch is grounded. The PTC assembly has the alarm and air volume automatic regulation functions, and PTC air volume stepless speed regulation and over-temperature alarm are achieved.

Description

technical field [0001] The invention relates to the technical field of automobile air-conditioning electrical systems, in particular to a PTC assembly with functions of alarm and automatic adjustment of air volume. Background technique [0002] In recent years, with the increasing popularity of electric vehicles, a typical temperature-sensitive semiconductor resistor (PTC) has attracted more and more attention because of its special heating characteristics (temperature step). It is widely used in the heating and heating process of electric vehicles. There are two types of PTC heaters commonly used on the market: air side heaters and water heaters. [0003] Basically, a row of PTC heating cores are arranged on the outside of the top-mounted air-conditioning core, and the fans of the air-conditioning are used to supply air to the cabin. The hot air is blown towards the head, and passengers will feel more uncomfortable after a long time. Then gradually evolved a PTC heater a...

AI Technical Summary

Problems solved by technology

This control method is simple, but its disadvantages are also obvious: the air volume cannot be adjusted freely; the PTC heater control is relatively independent from the air conditioner controller, and only has a simple on-off function; when the PTC heater fails, it will automatically shut down and cannot promptly notify the driver of the failure. ;There is a risk of "dry burning"

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