CN219139221U

CN219139221U - EGR cooler

Info

Publication number: CN219139221U
Application number: CN202223303426.3U
Authority: CN
Inventors: 万晓明
Original assignee: Wuxi Trs Heat Exchanger Co ltd
Current assignee: Wuxi Trs Heat Exchanger Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-06-06
Anticipated expiration: 2032-12-09

Abstract

The present utility model provides an EGR cooler comprising: the periphery of the shell is provided with a hollow cavity formed by side walls; the condensing channel is arranged in the shell and penetrates through the left end and the right end of the shell, one end of the condensing channel is connected with an engine exhaust pipe, the other end of the condensing channel is connected with an engine cooling air pipe, and high-temperature exhaust gas in the exhaust pipe is reinjected into the engine cooling air pipe through cooling; the circulating water supply system is arranged on the outer side wall of any side of the front and rear of the shell in a penetrating way; the exhaust system in the cavity penetrates through the outer side wall of the top of the shell, and air in the cavity is discharged by filling LLC cooling liquid. According to the utility model, the exhaust system in the cavity penetrating through the top end of the shell is adopted, LLC cooling liquid is filled into the cavity from the water filling port, so that the pressure in the cavity is changed, the air accumulated in the cavity is discharged from the exhaust port, the dry combustion failure is not generated due to the fact that the air in the water path is converged into the cavity, the service life of the EGR cooler is prolonged, and the reliability of the engine is improved.

Description

EGR cooler

Technical Field

The utility model relates to the field of engine EGR (exhaust gas recirculation), in particular to the technical field of EGR coolers, and in particular relates to an EGR cooler.

Background

In the prior art, engine coolant is added through a coolant water tank, and the coolant water tank is not at the highest point under normal conditions, so that air is accumulated in a water path of the whole engine, and the reliability of the engine is improved due to cracking of a water path cooler.

The prior art CN112595156a discloses the name: the multiphase coupling heat dissipation EGR cooler specifically comprises a barrel, wherein two ends of the barrel are provided with end socket assemblies consisting of a tail gas interface flange, an end socket, an outer side pore plate, a barrel ring and an inner side pore plate, the tail gas interface flange, the end socket and the outer side pore plate are surrounded into a tail gas inlet cavity and a tail gas outlet cavity, and the outer side pore plate, the barrel ring and the inner side pore plate are surrounded into a first circulating air cavity and a second circulating air cavity; the outer wall of the cylinder is provided with a third circulating air cavity communicated with the first circulating air cavity and the second circulating air cavity, a heat exchange tube assembly consisting of a main tube and an auxiliary tube is arranged in the cylinder, and foam metal bearing phase change materials is filled in the auxiliary tube, the first circulating air cavity and the second circulating air cavity. The heat exchange tube component has the functions of local phase change heat dissipation and single-phase heat dissipation, so that the heat dissipation rate of the cooler can be improved, and the dry burning phenomenon of the heat exchange tube can be avoided. The foam metal not only plays a role of bearing a framework, but also can provide capillary driving force for internal circulation of the phase change material, thereby realizing the recycling of the phase change material.

It is apparent from the figures of the above-mentioned art that in order to avoid the problem of air accumulation, the coolant outlet pipe is arranged uppermost in the whole EGR cooler, the coolant inlet is arranged lowermost in the whole EGR cooler, so that the reverse arrangement takes air in the cavity away in operation, and the continuous circulation of air in the water circuit causes the capacity of the water tank to be reduced as more and more air, and the reverse arrangement causes a larger load on the means for top control output and the means for bottom control injection.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, it is an object of the present utility model to provide an EGR cooler for solving the difficulties of the prior art.

To achieve the above and other related objects, the present utility model provides an EGR cooler including:

the shell 1, the hollow cavity 2 is formed by the side wall around the shell 1;

the condensing channel 3 is arranged in the shell 1, penetrates through the left end and the right end of the shell 1, one end of the condensing channel is connected with an engine exhaust pipe, the other end of the condensing channel is connected with an engine cooling air pipe, and high-temperature exhaust gas in the exhaust pipe is reinjected into the engine cooling air pipe through cooling;

the circulating water supply system 4 is arranged on the outer side wall of any side of the front and rear sides of the shell 1 in a penetrating way;

and the cavity exhaust system 5 penetrates through the outer side wall of the top of the shell 1, and air in the cavity is discharged by filling LLC cooling liquid.

According to a preferred embodiment, the condensation duct 3 comprises:

flanges 301, wherein the flanges 301 penetrate through the left end and the right end of the shell 1;

the sealing plate 302 is positioned on the inner wall of the flange 301 in the direction far away from the shell 1, the sealing plate 302 is provided with air pipe holes 303 in an array manner, and heat conduction air pipes 304 are arranged in the air pipe holes 303 in a penetrating manner;

the fixed plate 305, the fixed plate 305 is embedded in the cavity of the housing 1, is located at the junction of the housing 1 and the flange 301, and the fixed plate 305 is provided with grooves 306 at equal intervals, and the width of the grooves 306 is the same as the outer diameter of the heat conducting air pipe 304.

According to a preferred embodiment, the recirculating water supply system 4 comprises:

an LLC cooling liquid water injection port 401, wherein the LLC cooling liquid water injection port 401 is arranged on the outer side wall of any side of the front and rear of the shell 1 in a penetrating way, and is arranged at one side close to the flange 301;

LLC coolant water delivery port 402, LLC coolant water delivery port 402 wears to establish on the arbitrary one side lateral wall around casing 1, places in the one side of keeping away from LLC coolant water injection port 401, is located LLC coolant water injection port 401 below and is close to casing 1 bottom curb plate.

According to a preferred embodiment, the intra-cavity exhaust system 5 comprises:

a water filling port 501, a hexagonal valve 502 is arranged in the water filling port 501 in a penetrating way, a water nozzle 503 is arranged at one end, far away from the shell 1, of the hexagonal valve 502, and the bottom of the water nozzle 503 is embedded in the inner top of the hexagonal valve 502 to be upwards derived and connected with a water filling pipe;

an exhaust port 504, the exhaust port 504 being provided with a hexagonal bolt 505 at an end remote from the housing 1, the hexagonal bolt 505 blocking the exhaust port 504.

According to a preferred scheme, an O-shaped sealing ring 506 is arranged between the end face of the water injection port 501 far away from the shell 1 and the end face, close to the shell 1, of the hexagonal valve 502.

According to a preferred embodiment, the end of the water nozzle 503 far away from the housing 1 is in a spherical crown shape, and the outer diameter and the inner diameter of the spherical crown-shaped end of the water nozzle 503 are larger than the outer diameter and the inner diameter of the end of the water nozzle 503 close to the housing.

According to the utility model, the exhaust system in the cavity penetrating through the top end of the shell is adopted, LLC cooling liquid is filled into the cavity from the water filling port, so that the pressure in the cavity is changed, the air accumulated in the cavity is discharged from the exhaust port, the dry combustion failure is not generated due to the fact that the air in the water path is converged into the cavity, the service life of the EGR cooler is prolonged, and the reliability of the engine is improved.

Preferred embodiments for carrying out the present utility model will be described in more detail below with reference to the attached drawings so that the features and advantages of the present utility model can be easily understood.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic perspective view of a condensing duct according to the present utility model;

FIG. 3 shows a front view of the water filling nozzle of the present utility model;

FIG. 4 shows a front view of the exhaust port of the present utility model;

description of the reference numerals

1. A housing; 2. a cavity; 3. a condensing channel; 301. a flange; 302. a sealing plate; 303. a gas pipe hole; 304. a heat conducting air pipe; 305. a fixing plate; 306. a groove; 4. a circulating water supply system; 401. LLC cooling liquid water filling port; 402. LLC cooling liquid water delivery port; 5. an intra-cavity exhaust system; 501. a water filling port; 502. a hexagonal valve; 503. a water tap; 504. an exhaust port; 505. a hexagonal bolt; 506. an O-shaped sealing ring;

Detailed Description

In order to make the objects, technical solutions and advantages of the technical solutions of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present utility model. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.

Possible embodiments within the scope of the utility model may have fewer components, have other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. than the examples shown in the drawings. Furthermore, two or more of the elements in the figures may be implemented in a single element or a single element shown in the figures may be implemented as multiple separate elements.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

The utility model provides an EGR cooler, which is used in an EGR cooler production process, the type of the EGR cooler is not limited, but the structure of an exhaust system in a cavity is particularly suitable for preventing faults such as dry combustion and the like caused by air accumulation in the cavity of the EGR cooler.

Generally, the EGR cooler according to the present utility model mainly includes a housing, a condensation duct, a circulation water supply system, and an intra-cavity exhaust system, wherein reference may be made to fig. 1, which shows the arrangement of the housing, the condensation duct, the circulation water supply system, and the intra-cavity exhaust system.

In some embodiments of the utility model, one end of the EGR cooler is connected with an engine exhaust port of the engine, and the other end of the EGR cooler is connected with an engine cooling air pipe to cool the exhaust gas in the engine to re-enter the cooling air pipe so as to reduce the exhaust emission of the automobile, and the exhaust gas is recycled to improve the fuel utilization rate. The above-mentioned air flow is guided to the engine exhaust gas as shown in fig. 1 from one end of the EGR cooler and enters through the condensation channel 3, the heat in the exhaust gas is absorbed by the heat conducting air pipe 304 in the condensation channel 3, the heat is absorbed and conducted by the LLC cooling liquid in the whole cavity 2 to achieve the goal of reducing the temperature of the exhaust gas, the exhaust gas with reduced temperature is discharged from the other end of the EGR cooler and re-enters the cooling air pipe, and is re-injected into the engine through the cooling air pipe.

In some embodiments of the present utility model, a fixing plate 305 is added in addition to the conventional porous sealing plate 302 for limiting and fixing the heat-conducting air pipe 304, the fixing plate 305 is embedded in the cavity of the housing 1, and is located at the joint of the housing 1 and the flange 301, grooves 306 are arranged on the fixing plate 305 at equal intervals, the width of the grooves 306 is the same as the outer diameter of the heat-conducting air pipe 304, and the heat-conducting air pipe 304 is arranged between the grooves 306 in a penetrating manner, so that the shock resistance of the heat-conducting air pipe 304 is increased.

In some embodiments of the utility model, the recirculating water supply system 4 comprises: LLC coolant water injection port 401 and LLC coolant water delivery port 402, new coolant gets into from LLC coolant water injection port 401 and makes intracavity high temperature coolant discharge from coolant water delivery port 402 to this circulation makes the interior LLC coolant temperature of cavity 2 in the scope all the time, and sets up LLC coolant water delivery port 402 below LLC coolant water injection port 401, makes it be close to in the direction of casing 1 bottom curb plate, can reduce the pressure of the drawing liquid pump of the pipeline other end that links to each other with LLC coolant water delivery port 402.

In some embodiments of the present utility model, in order to prevent gas in the water path from accumulating in the cavity 2, an intra-cavity exhaust system 5 is added, the intra-cavity exhaust system 5 is composed of a water injection port 501 and an exhaust port 504, wherein a hexagonal valve 502 is penetrated in the water injection port 501, an O-ring 506 is arranged in an end face of the hexagonal valve 502 connected with the water injection port 501 to prevent LLC cooling liquid from leaking during filling, a water nozzle 503 is arranged at one end of the hexagonal valve 502 far away from the housing 1, one end of the water nozzle 503 far away from the housing 1 is in a spherical crown shape, the outer diameter and the inner diameter of one end of the spherical crown shape are larger than the outer diameter and the inner diameter of the end of the water nozzle 503 close to the housing, and a water injection pipe is sleeved at one end of the spherical crown shape to effectively prevent the pipe from falling off due to injection pressure. The end of the exhaust port 504 away from the housing 1 is provided with a hexagon bolt 505, the hexagon bolt 505 blocks the exhaust port 504, the exhaust port 504 generates a gap because of the bolt connection, the gas density is smaller than the LLC cooling liquid density during filling, and the gas in the cavity 2 is led to the exhaust port 504 with a gap with the outside and finally is discharged along with the pressure increase in the cavity 2 because the LLC cooling liquid is continuously injected into the end of the water filling port 501. And the situation that cracks penetrate to the surface of the shell 1 in the cavity 2 due to dry combustion caused by continuous accumulation of gas in the cavity 2 is prevented, and finally leakage of the EGR cooler finally causes loss of LLD cooling liquid, and the temperature of the heat conduction air pipe 304 cannot be reduced to deform the heat conduction air pipe 304 is prevented.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. An EGR cooler, characterized by comprising:

the shell (1), the hollow cavity (2) is formed by the side wall around the shell (1);

the condensing channel (3) is arranged in the shell (1), penetrates through the left end and the right end of the shell (1), one end of the condensing channel is connected with an engine exhaust pipe, the other end of the condensing channel is connected with an engine cooling air pipe, and high-temperature exhaust gas in the exhaust pipe is reinjected into the engine cooling air pipe through cooling;

the circulating water supply system (4) is arranged on the outer side wall of any side of the front side and the rear side of the shell (1) in a penetrating way;

and the cavity exhaust system (5) penetrates through the outer side wall of the top of the shell (1), and air in the cavity is discharged by filling LLC cooling liquid.

2. An EGR cooler according to claim 1, characterized in that the condensation duct (3) comprises:

flanges (301), wherein the flanges (301) are arranged at the left end and the right end of the shell (1) in a penetrating way;

the sealing plate (302), the sealing plate (302) is positioned on the inner wall of the flange (301) far away from the direction of the shell (1), the sealing plate (302) is provided with air pipe holes (303) in an array manner, and a heat conduction air pipe (304) is arranged in the air pipe holes (303) in a penetrating manner;

the fixing plate (305), the fixing plate (305) is embedded in the cavity of the shell (1), is located at the joint of the shell (1) and the flange (301), and is provided with grooves (306) at equal intervals on the fixing plate (305), and the width of the grooves (306) is the same as the outer diameter of the heat conducting air pipe (304).

3. An EGR cooler according to claim 2, characterized in that the recirculating water supply system (4) comprises:

an LLC cooling liquid injection port (401), wherein the LLC cooling liquid injection port (401) is arranged on the outer side wall of any side of the front and rear of the shell (1) in a penetrating way and is arranged on one side close to the flange (301);

LLC coolant water delivery mouth (402), LLC coolant water delivery mouth (402) wears to establish on arbitrary one side lateral wall around casing (1), places in the one side of keeping away from LLC coolant water injection mouth (401), is located LLC coolant water injection mouth (401) below and is close to casing (1) bottom curb plate.

4. An EGR cooler according to claim 3, characterized in that the intra-cavity exhaust system (5) comprises:

the water injection device comprises a water injection port (501), wherein a hexagonal valve (502) is arranged in the water injection port (501) in a penetrating way, a water nozzle (503) is arranged at one end, far away from a shell (1), of the hexagonal valve (502), and the bottom of the water nozzle (503) is embedded in the inner top of the hexagonal valve (502) to be upwards derivative and connected with a water injection pipe;

and the exhaust port (504), one end of the exhaust port (504) far away from the shell (1) is provided with a hexagon bolt (505), and the hexagon bolt (505) blocks the exhaust port (504).

5. The EGR cooler as claimed in claim 4, characterized in that an O-ring (506) is arranged between the end face of the water filling port (501) remote from the housing (1) and the end face of the hexagonal valve (502) close to the housing (1) in the middle.

6. The EGR cooler according to claim 5, characterized in that the end of the water nozzle (503) remote from the housing (1) is spherical, and the outer diameter and the inner diameter of the spherical end of the water nozzle (503) are larger than the outer diameter and the inner diameter of the end of the water nozzle (503) close to the housing.