Vehicle PTC heating control system and control method

Abstract

The invention discloses an automotive PTC (positive temperature coefficient heating element) heating control system and a control method. The control system comprises a PTC control module, an electric heating element, an environmental temperature sensor, an inside temperature sensor, a water temperature sensor and a relay, the PTC control module simultaneously receives an environmental temperature signal of a vehicle, a temperature signal of a driver cabin in the vehicle and the temperature signal of cooling liquid of an engine and controls the actions of the electric heating element through the comprehensive judgment of the signals and a temperature set value of a driver. When the electric heating element is started to work, whether the engine of the vehicle works normally or not needs to be firstly judged, when the engine is detected to be in abnormal working state, the electric heating element is not allowed to be started. The invention combines the PTC control module with the sensors to constitute a closed-loop control system. Therefore, the invention has the advantages of convenient use, sensitive reaction, low production cost, etc.

Description

technical field [0001] The invention belongs to the field of automobile air conditioning and heating, in particular to an automobile PTC heating control system. Background technique [0002] At present, domestic automobile air-conditioning systems are heated by engine cooling water in winter, and the engine cooling water is introduced into the heater core of the automobile air conditioner through hoses to realize heating inside the vehicle. The main problems with this approach are: [0003] 1. It is greatly affected by the state of the engine. If the temperature of the hot water in the engine is low, and the interior of the vehicle needs to be heated quickly at this time, the problem of slow heating rate will appear. [0004] 2. In winter, the front windshield of the vehicle is easy to freeze. If the engine coolant is heated to heat the air, the speed is relatively slow, and it is easy to cause defrosting during driving and affect driving safety. [0005] 3: In view of the...

AI Technical Summary

Problems solved by technology

[0003] 1. It is greatly affected by the state of the engine. If the temperature of the hot water in the engine is low, and the interior of the vehicle needs to be heated up quickly at this time, there will be a problem of slow heating rate.

[0004] 2. In winter, the front windshield of the vehicle is easy to freeze. If the engine coolant is heated to heat the air, the speed is relatively slow, which may easily cause problems such as defrosting and unclean removal during driving, which will affect driving safety.

[0005] 3: In view of the objective reason of the low water temperature caused by the high combustion efficiency of the diesel engine, it is impossible to meet the heating needs of the whole vehicle by relying on the engine cooling water alone

However, this approach has certain limitations. If it encounters rainy days, the above functions will be greatly restricted; in addition, its production cost is relatively high, and it is not easy to promote

China Patent No. 99250817.7, the patent name is energy-saving car heating device. It proposes a method of using car exhaust gas for heating. However, the exhaust gas has a high temperature and contains harmful gases to the human body. Once the core body leaks, the consequences will be difficult. Imagine that this method is basically not used in China at present

Images