CN210370865U

CN210370865U - Split type power supply heating diesel engine tail gas treatment liquid heating module

Info

Publication number: CN210370865U
Application number: CN201921225160.0U
Authority: CN
Inventors: 石波; 史蒂文传斯
Original assignee: Multi Parts China Co ltd
Current assignee: Daoman business consulting (Shanghai) Co.,Ltd.
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-04-21
Anticipated expiration: 2029-07-31

Abstract

For solving the problem that current DEF heating module exists, the utility model provides a split type power supply heating's diesel engine tail gas treatment liquid DEF heating module. Two power lines are connected in parallel on a power supply lead of the main heating system and are connected with an electric heating wire, the electric heating wire is wound on a solution supply pipe, and the power supply lead of the main heating system independently and directly enters a solution supply tank to be connected with a main heating unit. The length of the electric heating wire is more than twice of the length of the solution supply pipe. Advantageously, the entire DEF heating system is comprised of a primary heating element immersed in the reservoir and a secondary heating element wound around the supply tube, both heating elements being capable of ensuring that the DEF is in a normally operating liquid state.

Description

Split type power supply heating diesel engine tail gas treatment liquid heating module

Technical Field

The utility model relates to a diesel engine tail gas processing technology is about handling a large amount of NOx harmful substances in the engine exhaust's waste gas, and the vehicle needs one set to avoid DEF to freeze and maintains at the liquid heating module improvement device that can normally work.

Background

A significant problem with diesel engines is the large amount of NOx pollutants in the exhaust gases from the engine. One of the methods for reducing the emission of pollutants is to inject a urea-based compound solution into the exhaust system of the vehicle.

Diesel Exhaust Fluid (Diesel Exhaust Fluid), known as DEF or AdBlue, is a urea-based chemical product that has found wide use in Diesel vehicles. NOx in the exhaust gas is one of the causes of haze weather, and after DEF is injected into the exhaust system, it reacts chemically with NOx pollutants to produce harmless nitrogen and water, thereby reducing the harmful level of the exhaust gas.

The tail gas treating solution DEF is typically stored in an onboard DEF reservoir. Its freezing point is about-11 deg.C. In winter driving, air temperature is generally lower than the DEF freezing point, and therefore, a vehicle needs a heating device to prevent the DEF from freezing and maintain the DEF in a liquid state capable of working normally.

DEF heating systems for vehicles, commonly referred to as DEF heating modules, are immersed in a DEF reservoir and function to keep DEF solution in the reservoir from freezing and failing to smoothly enter the DEF injection system.

Prior heating devices, such as the one shown in fig. 1, US7978965 (CN101223822B) describe a dual function DEF heating module powered by a single circuit with the heating element located at the bottom.

The single circuit claimed in this patent provides on the one hand the current to the main heating unit from the electrical conductor; on the other hand, this electrical conductor simultaneously plays the role of a secondary heating unit for heating the DEF supply tube (5).

In this solution, the heating current is supplied to the main heating unit (6) by the electrical conductor, while, because the electrical conductor (8) is in close contact with the DEF supply pipe (5), the thermal energy comes from the heating caused by the self-resistance of the electrical conductor (8) after the current passes.

The heating of the supply tube is actually due to the heat generation side effect caused by the presence of the electrical resistance when current is passed through the conductor.

The provision of multiple heating paths by a single circuit is a relatively alternative design and the disadvantages of this design are eliminated and improved by the separate circuit.

The aforementioned patents have the disadvantages that:

in the aforementioned single circuit system, the power supply wire (8) supplies current to both the main heating unit (6) and the DEF oil supply pipe (5). The problem with this design is that the current to the DEF supply pipe (5) is not independent, since the part of the supply circuit is limited to variations in the supply current to the main heating unit (6).

In order to keep the solution in the DEF supply tube (5) in a liquid state, this design does not allow to increase or change the efficiency of heating the DEF supply tube (5) and vice versa without affecting the main heater efficiency.

The result is that the heating efficiency tolerance range becomes large and the manufacturer has to use extraordinary means to control the tolerances of the materials and parts in the manufacturing process. This also increases the cost and difficulty of manufacture and reduces system reliability.

The single circuit system does not have a separate heating unit. Failure of any one heating unit, and consequently failure of the entire heating system.

According to the foregoing patent, the single circuit supply wire is a straight wire that is nested with the DEF supply tube, and therefore, the heating efficiency of the DEF supply tube is limited due to the limited length of the wire.

Disclosure of Invention

For solving the problem that current DEF heating module exists, the utility model provides a split type power supply heating's diesel engine tail gas treatment liquid DEF heating module.

The scheme is that two power lines are connected in parallel on a power supply wire of a main heating system and are connected with an electric heating wire, the electric heating wire is wound on a solution supply pipe, and the power supply wire of the main heating system independently and directly enters a solution supply tank to be connected with a main heating unit.

The length of the electric heating wire is more than twice of the length of the solution supply pipe.

The utility model discloses a DEF heating system described comprises the main heating element who soaks the liquid storage pot and the secondary heating element of winding on the liquid feed pipe, and two heating elements ensure that DEF solution keeps the liquid that can normally work.

The utility model has the advantages that the electrical efficiency and the thermal efficiency of liquid storage pot and feed pipe heating are all independently adjustable.

In the case of failure of any one heating system, the other heating system can be used as a backup, so that the whole system has at least one heating unit in operation.

The utility model discloses in the design of split type circuit system, the heater wire is with the heliciform winding on the DEF feed pipe, compares the straight wire of aforementioned patent, and the heating efficiency of DEF feed pipe has obtained very big improvement.

Generally, the present invention adds twice as many heating elements to the DEF supply tube as the prior art designs, and additionally because the heating wire is laid outside the DEF supply tube. Thus, there is also great flexibility in the options that can be taken to adjust the heating efficiency.

The overall cost of manufacturing the DEF solution heater is improved since inexpensive and inexpensive materials can be used, and manufacturing tolerance requirements are also relatively relaxed.

Drawings

FIG. 1 is a schematic diagram of a prior art DEF heating module;

FIG. 2 is a schematic structural view of a DEF heating module of the present invention;

the reference numbers in the figures illustrate:

the device comprises a 1-DEF heating module, a 2-DEF diesel tail gas treatment liquid, a 3-upper cover, a 4-liquid storage tank, a 5-DEF solution liquid supply pipe, a 6-main heating unit, a 7-vehicle power supply system lead, an 8, 9-main heating system lead, a power supply system lead and a power supply system lead, wherein the power supply system lead is connected with the power supply system lead through the main heating unit; a 10-split DEF solution supply pipe heating wire.

Detailed Description

Referring to fig. 1 and 2, in the present invention, two power lines are connected in parallel to the main heating

system power wires

8 and 9 and connected to the electric heating wire 10, the electric heating wire 10 is wound around the solution supply pipe 5, and the main heating system power wire 9 is independently and directly fed into the solution supply tank 5 and connected to the main heating unit 6.

The length of the electric heating wire 10 is more than twice the length of the solution supply pipe 5.

As shown in the attached figure 2, the original power supply lead wire 8 is independently led into the liquid storage tank 4 by adopting a power supply lead wire 9, and the other two parallel power supply lead wires are connected with a split type DEF solution liquid supply pipe heating wire 10.

Thus, if the main heating unit 6 breaks down, the additional split type DEF solution liquid supply pipe heating wire 10 can work normally, and the diesel engine tail gas treatment liquid heating device can also work right above.

Claims

1. The utility model provides a diesel engine tail gas treatment fluid heating module of split type power supply heating which characterized in that, parallelly connected two power cords and the electric heating wire is connected on main heating system power supply wire, and the electric heating wire twines on the solution supply pipe, and main heating system power supply wire directly gets into alone in the solution supply jar and is connected with main heating unit.

2. The split type electrically heated diesel exhaust fluid heating module of claim 1, wherein the length of the electrical heating wire is more than twice the length of the solution supply pipe.