A three-way catalyst for preventing overheating

Abstract

The utility model discloses a prevent overheating type three -way catalyst, related to three -way catalyst technical field, including by catalytic converter shell, honeycomb carrier the three -way catalyst of constitution, straight strip type heat dissipation fin, a plurality of straight strip type heat dissipation fin's outside is provided with heat insulation cylinder cover, heat insulation cylinder cover is used to the operation of separating straight strip type heat dissipation fin and peripheral component. The utility model discloses through setting up with straight strip type heat dissipation fin, L type heat dissipation fin, air flow and catalytic converter shell, straight strip type heat dissipation fin, L type heat dissipation fin contact, can realize the high -efficient heat dissipation of catalytic converter shell, simultaneously, through the setting of heat insulation cylinder cover can form the shelter of catalytic converter shell, straight strip type heat dissipation fin, L type heat dissipation fin, make it and the component of surrounding each other separate, and the heat of catalytic converter shell emission is taken away by flowing air, will not radiate to the peripheral component, and then reach the effect of reducing the heat radiation of three -way catalyst to peripheral component.

Description

Technical Field

[0001] This utility model relates to the field of three-way catalytic converter technology, specifically a three-way catalytic converter designed to prevent overheating. Background Technology

[0002] The three-way catalytic converter is a crucial external purification device installed in the automotive exhaust system. Its main function is to convert the three main harmful gases produced after engine combustion into relatively harmless substances through oxidation and reduction reactions. Its core structure and working principle are as follows:

[0003] Carrier: It is usually a honeycomb-structured ceramic block (there are also metal carriers) covered with dense parallel channels. This design can greatly increase the contact area between exhaust gas and catalyst, while ensuring smooth exhaust and avoiding excessive back pressure.

[0004] Coating: A layer of porous material (such as alumina) covering the surface of the carrier, which further increases the surface area and allows the noble metal catalyst to be evenly distributed.

[0005] Catalysts: Noble metals impregnated in the coating, mainly: Platinum (Pt) and Palladium (Pd): responsible for oxidation reactions (handling CO and HC); Rhodium (Rh): responsible for reduction reactions (handling NOx);

[0006] Working principle: When high-temperature exhaust gas passes through the catalyst, the harmful components in the exhaust gas undergo corresponding chemical oxidation-reduction reactions under the catalytic action of precious metals, and are converted into harmless CO2, H2O and N2.

[0007] For a three-way catalytic converter to operate efficiently, it must meet a key condition: operating within a "window" temperature range (typically 250°C-800°C). This results in a high outer casing temperature during operation. Excessive outer casing temperature can cause heat radiation to other components such as the chassis and suspension parts, affecting their lifespan. Therefore, to reduce the heat radiation from the three-way catalytic converter to surrounding components, an overheat-preventing three-way catalytic converter is provided. Utility Model Content

[0008] The purpose of this invention is to provide an overheat-preventing three-way catalytic converter in order to solve the problems mentioned above.

[0009] To achieve the above objectives, this utility model provides the following technical solution: an overheat-preventing three-way catalytic converter, comprising a catalytic converter shell and a honeycomb carrier, wherein the honeycomb carrier is installed on the inner side of the catalytic converter shell, and a straight strip-shaped heat dissipation fin is fixed in the middle of the outer side of the catalytic converter shell, wherein multiple straight strip-shaped heat dissipation fins are provided, and the cross-sectional trajectories of the multiple catalytic converter shells are evenly distributed, thereby increasing the heat dissipation area with the flowing air;

[0010] A heat insulation sleeve is provided on the outer side of the multiple straight heat dissipation fins. The heat insulation sleeve is used to isolate the straight heat dissipation fins from the surrounding components and to guide the airflow.

[0011] As a further embodiment of this utility model: an L-shaped heat dissipation fin is fixed to the inner side of the straight strip heat dissipation fin, and the number and position of the L-shaped heat dissipation fins correspond one-to-one with the number and position of the straight strip heat dissipation fins, and the lateral part of the L-shaped heat dissipation fin is fixed to the side of the straight strip heat dissipation fin.

[0012] As a further improvement of this utility model: the outer side of the straight heat dissipation fin does not contact the inner side of the heat insulation cylinder cover, and the lateral part of the L-shaped heat dissipation fin is located at the middle position of the straight heat dissipation fin.

[0013] As a further embodiment of this utility model: the length of the straight heat dissipation fins matches the length of the straight cylindrical part in the middle of the catalyst housing, the length of the heat insulation cover and the L-shaped heat dissipation fins is greater than the length of the straight cylindrical part in the middle of the catalyst housing, and the two ends of the heat insulation cover and the L-shaped heat dissipation fins extend beyond the contraction openings at both ends of the catalyst housing.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By incorporating straight and L-shaped heat dissipation fins, airflow comes into contact with the catalytic converter housing, achieving efficient heat dissipation for the catalytic converter housing. Simultaneously, the heat insulation casing shields the catalytic converter housing, the straight and L-shaped heat dissipation fins, and the heat dissipation fins, isolating them from surrounding components. Heat emitted from the catalytic converter housing is carried away by the flowing air, preventing radiation to surrounding components and thus reducing the heat radiation from the three-way catalytic converter to surrounding parts. Attached Figure Description

[0016] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0017] Fig. 2 This is a structural schematic diagram from another perspective of the present invention;

[0018] Fig. 3 This is a cross-sectional view of the structure of this utility model.

[0019] In the diagram: 1. Three-way catalytic converter; 101. Catalytic converter housing; 102. Honeycomb carrier; 2. Straight heat dissipation fins; 3. Heat insulation cover; 4. L-shaped heat dissipation fins. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figs. 1-3 In this embodiment of the present invention, an overheat-preventing three-way catalytic converter includes a three-way catalytic converter 1 composed of a catalytic converter housing 101 and a honeycomb carrier 102. The honeycomb carrier 102 is installed on the inner side of the catalytic converter housing 101. A straight strip-shaped heat dissipation fin 2 is fixed in the middle of the outer side of the catalytic converter housing 101. Multiple straight strip-shaped heat dissipation fins 2 are provided, and the cross-sectional trajectories of the multiple catalytic converter housings 101 are evenly distributed. The straight strip-shaped heat dissipation fins 2 are used to increase the heat dissipation area with the flowing air.

[0022] A heat insulation sleeve 3 is provided on the outside of multiple straight heat dissipation fins 2. The heat insulation sleeve 3 is used to separate the straight heat dissipation fins 2 from the surrounding components and to guide the airflow.

[0023] An L-shaped heat dissipation fin 4 is fixed to the inner side of the straight heat dissipation fin 2. The number and position of the L-shaped heat dissipation fin 4 correspond one-to-one with the number and position of the straight heat dissipation fin 2, and the horizontal part of the L-shaped heat dissipation fin 4 is fixed to the side of the straight heat dissipation fin 2.

[0024] In this embodiment, it should be noted that the three-way catalytic converter 1 is mainly used to be installed at the bottom of the vehicle so that during vehicle operation, the airflow can come into contact with the catalytic converter housing 101, the straight heat dissipation fins 2, and the L-shaped heat dissipation fins 4, thereby achieving efficient heat dissipation of the catalytic converter housing 101.

[0025] At the same time, the heat insulation cover 3 can shield the catalyst housing 101, the straight heat dissipation fins 2, and the L-shaped heat dissipation fins 4, so that they are isolated from the surrounding components. The heat emitted by the catalyst housing 101 is carried away by the flowing air and will not radiate to the surrounding components, thereby reducing the heat radiation of the three-way catalytic converter 1 to the surrounding components.

[0026] Please refer to this carefully. Figs. 1-3The outer side of the straight heat dissipation fin 2 does not contact the inner side of the heat insulation sleeve 3, and the lateral part of the L-shaped heat dissipation fin 4 is located in the middle of the straight heat dissipation fin 2.

[0027] In this embodiment: by having a structure in which the outer side of the straight heat dissipation fin 2 does not contact the inner side of the heat insulation cover 3, the heat on the straight heat dissipation fin 2 is effectively prevented from being directly transferred to the heat insulation cover 3, so that the heat of the catalyst shell 101 is transferred along the trajectory of the straight heat dissipation fin 2 and the L-shaped heat dissipation fin 4. During this process, there is flowing air to achieve efficient heat exchange and achieve a good heat dissipation effect.

[0028] By positioning the horizontal portion of the L-shaped heat dissipation fin 4 at the center of the straight heat dissipation fin 2, a significant height difference is created between the horizontal portion of the L-shaped heat dissipation fin 4 and the inner side of the heat insulation cover 3. This results in a higher vertical portion of the L-shaped heat dissipation fin 4, further extending the heat transfer path and increasing the heat dissipation area.

[0029] Please refer to this carefully. Figs. 1-3 The length of the straight heat dissipation fin 2 matches the length of the straight cylindrical part in the middle of the catalyst housing 101. The lengths of the heat insulation cover 3 and the L-shaped heat dissipation fin 4 are greater than the length of the straight cylindrical part in the middle of the catalyst housing 101, and the ends of the heat insulation cover 3 and the L-shaped heat dissipation fin 4 extend beyond the contraction openings at both ends of the catalyst housing 101.

[0030] In this embodiment: by extending beyond the contraction openings at both ends of the heat insulation cover 3 and the L-shaped heat dissipation fins 4, respectively, air can better enter between the heat insulation cover 3 and the catalyst housing 101. When the air passes through the area where the straight heat dissipation fins 2 are located, the air flow channel becomes smaller and the flow rate increases, which can remove heat more quickly.

[0031] It should also be noted that during the process of heat being transferred from the honeycomb carrier 102 to the outer wall of the catalyst housing 101, it has already passed through a layer of ceramic carrier and metal housing for conduction, which cools the outside of the catalyst housing 101. This is equivalent to dealing with the "tail of heat" and does not affect the normal operation of the honeycomb carrier 102.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An overheat-preventing three-way catalytic converter, comprising a three-way catalytic converter (1) consisting of a catalytic converter housing (101) and a honeycomb carrier (102), wherein the honeycomb carrier (102) is installed on the inner side of the catalytic converter housing (101), characterized in that, A straight heat dissipation fin (2) is fixed on the middle of the outer side of the catalyst housing (101). Multiple straight heat dissipation fins (2) are provided. The multiple straight heat dissipation fins (2) are evenly distributed along the cross-sectional trajectory of the catalyst housing (101). The straight heat dissipation fins (2) are used to increase the heat dissipation area with the flowing air. A heat insulation sleeve (3) is provided on the outside of the multiple straight heat dissipation fins (2). The heat insulation sleeve (3) is used to separate the straight heat dissipation fins (2) from the surrounding components and to guide the airflow. The inner side of the straight heat dissipation fin (2) is fixed with an L-shaped heat dissipation fin (4). The number and position of the L-shaped heat dissipation fin (4) correspond one-to-one with the number and position of the straight heat dissipation fin (2), and the lateral part of the L-shaped heat dissipation fin (4) is fixed to the side of the straight heat dissipation fin (2). The outer side of the straight heat dissipation fin (2) does not contact the inner side of the heat insulation cover (3), and the lateral part of the L-shaped heat dissipation fin (4) is located at the middle position of the straight heat dissipation fin (2).

2. The overheat-prevention three-way catalytic converter according to claim 1, characterized in that, The length of the straight heat dissipation fins (2) matches the length of the straight cylindrical part in the middle of the catalyst housing (101). The lengths of the heat insulation cover (3) and the L-shaped heat dissipation fins (4) are greater than the length of the straight cylindrical part in the middle of the catalyst housing (101). The ends of the heat insulation cover (3) and the L-shaped heat dissipation fins (4) extend beyond the contraction openings at both ends of the catalyst housing (101).

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