A gas-liquid tube type positive temperature coefficient thermistor heater for a multifunctional vehicle

Abstract

The invention discloses a multifunctional gas / liquid pipe-type positive-temperature-coefficient thermistor heater for vehicles. The heater includes a heater shell. A heater heat source is arranged in the heater shell. The heater heat source is in contact with an electrode plate. The electrode plate is in contact with a radiator. One end of the heater shell is fixedly connected with a connector. The connector is connected with one end of an electrical quick joint. The electrical quick joint is connected with one end of a liquid / gas pipe. The liquid / gas pipe is coated with a polymer PTC film. The polymer PTC film is sleeved with a double-wall heat shrinkable tube. The multifunctional gas / liquid pipe-type positive-temperature-coefficient thermistor heater for vehicles is used in a vehicle heating and diagnosing system. The problem that the traditional heater has many and disorderly wire harnesses and the problem that the heater cannot be powered off after being separated from an engine are solved. A safer design is adopted. The heater and a diagnosis structure are in the same circuit. The power supply is cut off immediately after the heater connector is disconnected. Thus, the heater is safer.

Description

technical field [0001] The invention relates to the field of an automobile crankcase ventilation heater, in particular to a gas-liquid tube type positive temperature coefficient thermistor heater for a multifunctional vehicle. Background technique [0002] The crankcase ventilation heater belongs to the auto parts, and is installed on the engine of the motor vehicle to connect the crankcase and the intake pipe. [0003] Gasoline or diesel engines generate exhaust gas between the piston and cylinder of the crankcase due to combustion, which contains unburned substances and nitrogen oxides as well as water vapor. This exhaust gas and engine oil and other substances exist in the form of oil mist. Previously, the mixture of crankcase exhaust gases and engine oil was discharged directly into the environment through a pressure reducing valve. If the crankcase is not ventilated, the pressure inside it will build up as the engine is running, which may eventually cause the engine t...

AI Technical Summary

Problems solved by technology

[0004] When the traditional mechanical diagnostic system is in use, the locking structure of the connector can be opened and installed only after the crankcase heater is connected, and the diagnostic circuit and the heater circuit are independent of each other, so there are shortcomings in this design: because The diagnostic circuit and the heater circuit are independent of each other, which means that when the crankcase ventilation heater is detached from the engine, although a diagnostic signal can be issued, the heater will continue to generate heat if the power supply is not disconnected, which may cause malfunction. foreseeable potential risks

In addition, this solution requires multiple wiring harnesses, which leads to the problems of crowded wiring harnesses and poor aesthetics of the engine, and this structure can no longer increase the heating function of the PTC film (covering the surface of the pipe), and the function is single

[0005] There is also a heater designed by using PTC heat source to generate heat. When in use, the heat is transferred to the plastic. After the plastic is heated, the heat is transferred to the aluminum heat sink. This design still has shortcomings: due to the poor thermal conductivity of the plastic material , the thermal resistance at the plastic part during the heat transfer process is very large, causing heat to accumulate at the heat source. After a long time of use, the metal electrode sheet is oxidized and corroded due to overheating, which eventually leads to product failure.

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