CN105201601A - Vehicle urea solution heating device and heating method - Google Patents

Abstract

The invention provides a vehicle urea solution heating device and a heating method, comprising the following steps: the outer peripheral wall of the stirring tank is provided with a coil pipe; the host machine is communicated with the coil pipe, and a pressure relief device is arranged on a pipeline between the host machine and the coil pipe. By applying the technical scheme of the invention, the coil pipe is arranged on the outer peripheral wall of the stirring tank and communicated with the host machine through the coil pipe, and the pressure relief device is arranged between the host machine and the coil pipe. By adopting the technical scheme, the secondary pollution of the automobile urea solution can not occur in the heating process, the device is simple to set, and the problems of low heating efficiency and high engine heating mode cost of an electric heating mode can be effectively solved.

Description

Vehicle urea solution heating device and heating method

technical field

The invention relates to the technical field of vehicle engineering, in particular to a vehicle urea solution heating device and a heating method.

Background technique

In the prior art, the heating methods of urea solution for vehicles are generally: electric heating and engine heating, but both electric heating and engine heating have their own shortcomings:

(1) The existing electric heating method needs to insert the heating rod into the solution, which will pollute the urea solution for vehicles, and the heating efficiency is low;

(2) Although the function of existing engine heating can be satisfied, the structure is complex and the cost is high.

Contents of the invention

The main purpose of the present invention is to provide a vehicle urea solution heating device and a heating method to solve the problems of complex structure and high cost of vehicle urea solution heating in the prior art.

In order to achieve the above object, according to one aspect of the present invention, a kind of urea solution heating device for vehicles is provided, comprising: a stirring tank, a coil pipe is arranged on the outer peripheral wall of the stirring tank; There is a pressure relief device on the pipeline between the coils.

Further, the main engine communicates with the inlet end of the coil pipe through the first pipe, and the main machine communicates with the outlet end of the coil pipe through the second pipe, wherein the second pipe is provided with a pressure relief device.

Further, the host is equipped with a compressor for converting the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant and an evaporator for converting the high-temperature and high-pressure gaseous refrigerant into a low-temperature and high-pressure liquid refrigerant after heat exchange. connected to the evaporator.

Further, the compressor is a heat pump compressor.

Further, the coiled pipe is a copper pipe.

Further, the pressure relief device is an expansion valve.

According to another aspect of the present invention, a method for heating urea solution for vehicles is provided, including a heating device for urea solution for vehicles, the heating device for urea solution for vehicles is the above-mentioned heating device for urea solution for vehicles, and the heating method for urea solution for vehicles comprises The following steps: Step S01: start the main engine to convert the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the coil tube arranged on the outer peripheral wall of the stirring tank to heat with the urea mixed solution in the stirring tank Exchange; step S02: the high-temperature and high-pressure gaseous refrigerant is converted into a low-temperature and high-pressure liquid refrigerant after heat exchange, and the low-temperature and high-pressure liquid refrigerant is converted into a low-temperature and low-pressure liquid refrigerant through a pressure relief device, and the low-temperature and low-pressure liquid refrigerant enters the host; repeat the above Step S01 and Step S02.

Further, the following steps are also included before step S01: before step S01, prepare a urea solution mixed with a certain concentration of urea solution and ultrapure water in a stirring tank.

Further, the low-temperature and low-pressure gaseous refrigerant in step S01 enters the compressor in the host to form a high-temperature and high-pressure gaseous refrigerant.

Furthermore, the low-temperature and low-pressure liquid refrigerant passes through the evaporator of the host for heat exchange to form a low-temperature and low-pressure gaseous refrigerant.

Further, high-temperature and high-pressure gaseous refrigerant flows into the coil through the first pipeline, and low-temperature and low-pressure liquid refrigerant flows into the main unit through the second pipeline.

Applying the technical scheme of the present invention, a coiled pipe is arranged on the outer peripheral wall of the stirring tank, and communicates with the main machine through the coiled pipe, and a pressure relief device is arranged between the main machine and the coiled pipe. By adopting the technical solution, the urea solution for vehicles can be heated without secondary pollution, and the device is simple to set up, which can effectively solve the problems of low heating efficiency of the electric heating method and high cost of the engine heating method.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 shows a schematic structural diagram of a vehicle urea solution heating device according to an embodiment of the present invention.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Stirring tank; 20. Host.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in FIG. 1 , this embodiment provides a vehicle urea solution heating device, which includes a stirring tank 10 and a host 20 . A coiled pipe is arranged on the outer peripheral wall of the stirring tank 10 . The main engine 20 is connected with the coil pipe, and a pressure relief device is arranged on the pipeline between the main engine 20 and the coil pipe.

In this embodiment, a coiled pipe is provided on the outer peripheral wall of the stirring tank 10, and communicates with the main machine 20 through the coiled pipe, and a pressure relief device is provided between the main machine 20 and the coiled pipe. By adopting the technical solution, the urea solution for vehicles can be heated without secondary pollution, and the device is simple to set up, which can effectively solve the problems of low heating efficiency of the electric heating method and high cost of the engine heating method. Using the device of the invention can effectively improve the heating efficiency, and also play the role of energy saving and environmental protection.

In this embodiment, the main engine 20 communicates with the inlet end of the coil pipe through the first pipe, and the main machine 20 communicates with the outlet end of the coil pipe through the second pipe, wherein the second pipe is provided with a pressure relief device. Such arrangement is beneficial to effectively heating the mixed liquid in the stirring tank 10 . Among them, the main engine 20 is provided with a compressor for converting the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant and an evaporator for converting the high-temperature and high-pressure gaseous refrigerant into a low-temperature and high-pressure liquid refrigerant after heat exchange. connected to the evaporator. In order to better realize the effective heating of the mixed liquid in the mixing tank 10, the compressor is preferably a heat pump compressor, the coil is a copper pipe or other pipes that are conducive to refrigerant transportation and efficient heat exchange, and a pressure relief device Can be an expansion valve.

In the second embodiment of the present invention, a method for heating urea solution for vehicles is provided. The method for heating urea solution for vehicles is mainly realized by the above-mentioned heating device for urea solution for vehicles. The method for heating urea solution for vehicles includes the following The steps are specifically: step S01: start the main engine 20 to convert the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the coil tube arranged on the outer peripheral wall of the stirring tank 10 and the gaseous refrigerant in the stirring tank 10 Heat exchange with the urea mixed solution; step S02: the high-temperature and high-pressure gaseous refrigerant is converted into a low-temperature and high-pressure liquid refrigerant after heat exchange, and the low-temperature and high-pressure liquid refrigerant is converted into a low-temperature and low-pressure liquid refrigerant through a pressure relief device, and the low-temperature and low-pressure liquid refrigerant enters In the host 20; repeat the above step S01 and step S02.

Adopting the method for heating the urea solution for vehicles can prevent the secondary pollution of the urea solution for vehicles during the heating process, and the method is simple to operate, and can effectively solve the problem of low heating efficiency of the electric heating method and high cost of the engine heating method The problem. Using the method can effectively improve the heating efficiency of the electric heating method, and also play the role of energy saving and environmental protection.

Wherein, before step S01 , it also includes preparing a urea solution mixed with a certain concentration of urea solution and ultrapure water in the stirring tank 10 . This makes the heating process of the vehicle urea solution more efficient and safe.

In this embodiment, the low-temperature and low-pressure gaseous refrigerant in step S01 enters the compressor in the host 20 to form a high-temperature and high-pressure gaseous refrigerant.

The low-temperature and low-pressure liquid refrigerant undergoes heat exchange through the evaporator of the main engine 20 to form a low-temperature and low-pressure gaseous refrigerant.

The high-temperature and high-pressure gaseous refrigerant flows into the coil through the first pipe, and the low-temperature and low-pressure liquid refrigerant flows into the host 20 through the second pipe.

As shown in Figure 1, in this embodiment, it is composed of a host machine 20 and a stirring tank 10 with copper pipes wound on its surface. As a PLC (a programmable logic controller), it is used to control the switching and sending of electrical devices in the equipment. When the heating start command is given to the host 20, the host starts immediately. Using the reverse Carnot cycle principle, the heat pump compressor installed in the host 20 works to convert the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The refrigerant enters through the first pipeline. In the coil of the stirring tank 10, a certain amount of urea and a corresponding proportion of ultrapure water mixed liquid have been added to the stirred tank 10 in advance, and the high-temperature and high-pressure gaseous refrigerant passes through the stainless steel inner wall of the stirred tank 10 and the mixed liquid in the stirred tank 10 Perform heat exchange and transform into low-temperature and high-pressure liquid refrigerant, and then decompress and transform into low-temperature and low-pressure liquid refrigerant through the expansion valve through the second pipeline. , and then into the heat pump compressor, such a reciprocating cycle can complete the heating treatment of the vehicle urea solution.

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects:

Applying the technical scheme of the present invention, a coiled pipe is arranged on the outer peripheral wall of the stirring tank, and communicates with the main machine through the coiled pipe, and a pressure relief device is arranged between the main machine and the coiled pipe. By adopting the technical solution, the urea solution for vehicles can be heated without secondary pollution, and the device is simple to set up, which can effectively solve the problems of low heating efficiency of the electric heating method and high cost of the engine heating method.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (11)

1. a urea for vehicle solution heating device, is characterized in that, comprising:

Agitator tank (10), the periphery wall of described agitator tank (10) is provided with coil pipe;

Main frame (20), described main frame (20) is connected with described coil pipe, and the pipeline between described main frame (20) and described coil pipe is provided with pressure relief device.

2. urea for vehicle solution heating device according to claim 1, it is characterized in that, described main frame (20) is connected by the entrance point of the first pipeline with described coil pipe, described main frame (20) is connected by the outlet end of second pipe with described coil pipe, wherein, described second pipe is provided with described pressure relief device.

3. urea for vehicle solution heating device according to claim 1, it is characterized in that, described main frame (20) inside is provided with the compressor of the gaseous coolant for the gaseous coolant of low-temp low-pressure being converted to High Temperature High Pressure and converts the vaporizer of the liquid refrigerants of cryogenic high pressure after being used for that the gaseous coolant of High Temperature High Pressure is carried out heat exchange to, and described compressor is connected with described vaporizer.

4. urea for vehicle solution heating device according to claim 3, is characterized in that, described compressor is heat pump compressor.

5. urea for vehicle solution heating device according to claim 1, is characterized in that, described coil pipe is copper pipe.

6. urea for vehicle solution heating device according to claim 1, is characterized in that, described pressure relief device is expansion valve.

7. urea for vehicle solution heating means, comprise urea for vehicle solution heating device, it is characterized in that, the urea for vehicle solution heating device of described urea for vehicle solution heating device according to any one of claim 1 to 6, described urea for vehicle solution heating means comprise the following steps:

Step S01: start the gaseous coolant that the gaseous coolant of low-temp low-pressure is converted to High Temperature High Pressure by described main frame (20), the gaseous coolant of described High Temperature High Pressure enter be arranged at described agitator tank (10) periphery wall on described coil pipe in carry out heat exchange with the urea mixed solution in described agitator tank (10);

Step S02: the liquid refrigerants converting cryogenic high pressure after the gaseous coolant of described High Temperature High Pressure carries out heat exchange to, the liquid refrigerants of described cryogenic high pressure converts the liquid refrigerants of low-temp low-pressure to by pressure relief device, the liquid refrigerants of described low-temp low-pressure enters in described main frame (20);

Repeat above-mentioned steps S01 and step S02.

8. urea for vehicle solution heating means according to claim 7, is characterized in that, further comprising the steps of before described step S01:

Before step S01, the urea liquid mixed solution that the certain density urea liquid of preparation mixes with ultrapure aqueous phase in described agitator tank (10).

9. urea for vehicle solution heating means according to claim 7, is characterized in that, the gaseous coolant of the described low-temp low-pressure in described step S01 forms the gaseous coolant of described High Temperature High Pressure after entering the compressor in described main frame (20).

10. urea for vehicle solution heating means according to claim 7, is characterized in that, the liquid refrigerants of described low-temp low-pressure forms the gaseous coolant of described low-temp low-pressure after the vaporizer of described main frame (20) carries out heat exchange.

11. urea for vehicle solution heating means according to claim 7, it is characterized in that, the gaseous coolant of described High Temperature High Pressure flows into described coil pipe by the first pipeline, and the liquid refrigerants of described low-temp low-pressure is flowed in described main frame (20) by second pipe.