Lightweight three-way catalyst heat shield structure

Abstract

The utility model relates to the technical field of three -way catalyst heat shield, especially is a kind of lightweight three -way catalyst heat shield structure, including upper cover, the bottom of upper cover is installed with lower cover, the upper cover includes heat shield cover, the inner wall of heat shield cover is fixedly connected with convex strip, and the number of convex strip is multiple, the lower cover includes air guide cover, the air guide cover is installed in the bottom of heat shield cover, the inside of air guide cover is provided with inner chamber, the bottom of air guide cover is equipped with air inlet, the top of air guide cover is equipped with air outlet, the air inlet is connected with air outlet by the inner chamber and is communicated. The utility model provides a kind of full-wrapping type three -way catalyst heat shield structure with good heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the field of heat shields for three-way catalytic converters, and in particular to a lightweight heat shield structure for three-way catalytic converters. Background Technology

[0002] A three-way catalytic converter heat shield is an automotive component installed on the outside of the three-way catalytic converter to block its high-temperature radiation and protect surrounding parts. It prevents rubber parts, wiring harnesses, and other components around the three-way catalytic converter from aging and failing due to high temperatures, ensuring the normal service life of related automotive components, reducing the dissipation of heat from the three-way catalytic converter to the surrounding environment, helping to maintain its internal reaction temperature, improving the ignition efficiency of the three-way catalytic converter, and thus reducing pollutant emissions.

[0003] Three-way catalytic converter heat shields come in semi-shielded and fully enclosed types. Semi-shielded types, such as stamped semi-circular arc-shaped shields, are installed on the upper part of the three-way catalytic converter. They have the advantages of simple structure and low cost, but the heat insulation effect is poor and cannot protect the surrounding components of the three-way catalytic converter well. Fully enclosed types use two heat shields to completely wrap the three-way catalytic converter. The wrapping is tight and the heat insulation effect is better, but the heat dissipation effect is poor and the heat cannot be dissipated quickly. Utility Model Content

[0004] In view of this, the present invention provides a lightweight three-way catalytic converter heat shield structure. The main technical problem to be solved is to provide a fully enclosed three-way catalytic converter heat shield structure with good heat dissipation effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a lightweight three-way catalytic converter heat insulation cover structure, including an upper cover, a lower cover installed at the bottom of the upper cover, the upper cover including a heat insulation protective cover, the inner wall of the heat insulation protective cover being fixedly connected with multiple protruding strips, the lower cover including an air guiding cover, the air guiding cover being installed at the bottom of the heat insulation protective cover, the air guiding cover having an inner cavity, the bottom of the air guiding cover having an air inlet, the top of the air guiding cover having an air outlet, the air inlet being connected to the air outlet through the inner cavity.

[0006] By adopting the above technical solution, a fully enclosed heat insulation structure is formed by combining the upper and lower covers, which can more effectively achieve heat insulation. The inner wall of the upper cover's heat insulation protective cover has multiple raised strips, which create multiple channels for hot air flow between the heat insulation protective cover and the three-way catalytic converter. The lower cover's air guide cover has an inner cavity, an air inlet, and an air outlet. During vehicle operation, the air velocity at the bottom of the lower cover is faster and the pressure is lower; while the air inside the upper cover is heated by the three-way catalytic converter, resulting in a higher temperature and pressure. At this time, under the effect of the pressure difference, the hot air inside the upper cover will be discharged through the inner cavity of the air guide cover, thereby significantly enhancing the heat dissipation effect.

[0007] As a further description of the above technical solution:

[0008] The position of the air outlet corresponds to the position of the protrusion.

[0009] By adopting the above technical solution, a heat dissipation channel is formed.

[0010] As a further description of the above technical solution:

[0011] The outer surface of the heat insulation protective cover is fixedly connected to a first side plate, and the surface of the first side plate is provided with a first connection hole.

[0012] By adopting the above technical solution, it is easy to fix the heat insulation cover between the bottom of the car and the three-way catalytic converter, so as to achieve the effect of heat insulation protection.

[0013] As a further description of the above technical solution:

[0014] The outer surface of the air guide cover is fixedly connected to a second side plate, the position of which corresponds to the position of the first side plate. A second connecting hole is provided on the surface of the second side plate, the position of which corresponds to the position of the first connecting hole.

[0015] By adopting the above technical solution, it is easy to install the air guide cover below the three-way catalytic converter, and combine it with the heat insulation cover to form a fully enclosed structure, which can achieve better heat insulation effect.

[0016] As a further description of the above technical solution:

[0017] The heat insulation protective cover consists of an inner layer of aluminized steel plate, a middle layer of ceramic fiber, and an outer layer of aluminized steel plate.

[0018] By adopting the above technical solution, the high-temperature radiation of the three-way catalytic converter can be blocked, protecting the surrounding components from the effects of high temperature.

[0019] As a further description of the above technical solution:

[0020] The air guide cover is made of aluminized steel plate, and the inner surface of the air guide cover is provided with grid-like reinforcing ribs.

[0021] By adopting the above technical solution, the structural strength of the air guide cover can be guaranteed, enabling it to be stably installed at the bottom of the heat insulation protective cover.

[0022] By employing the above technical solution, the lightweight three-way catalytic converter heat shield structure of this utility model has at least the following beneficial effects:

[0023] Compared to existing technologies, this lightweight three-way catalytic converter heat shield structure, through the combination of an upper and lower shield, forms a fully enclosed heat shield structure, achieving a more effective heat insulation effect. The inner wall of the upper shield's heat shield has multiple raised strips, which create multiple channels for hot air flow between the heat shield and the three-way catalytic converter. The lower shield's air guide shield has an inner cavity, an air inlet, and an air outlet. During vehicle operation, the airflow velocity is faster and the pressure is lower at the bottom of the lower shield; while the air inside the upper shield is heated by the three-way catalytic converter, resulting in a higher temperature and pressure. Under this pressure difference, the hot air inside the upper shield is expelled through the inner cavity of the air guide shield, significantly enhancing the heat dissipation effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure from a first-view perspective of the present invention.

[0025] Figure 2 This is a schematic diagram of the overall structure from a second perspective proposed in this utility model;

[0026] Figure 3 This is a first-view sectional view of the internal structure proposed in this utility model;

[0027] Figure 4 This is a second-view sectional view of the internal structure proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the air guide cover structure proposed in this utility model.

[0029] Legend:

[0030] 1. Upper cover; 101. Heat insulation protective cover; 102. Raised strip; 103. First side plate; 2. Lower cover; 201. Air guide cover; 202. Inner cavity; 203. Second side plate. Detailed Implementation

[0031] Reference Figure 1-5This utility model provides a lightweight three-way catalytic converter heat insulation cover structure, including an upper cover 1 and a lower cover 2 installed at the bottom of the upper cover 1. The upper cover 1 includes a heat insulation protective cover 101, and the inner wall of the heat insulation protective cover 101 is fixedly connected with a plurality of protrusions 102. The lower cover 2 includes an air guide cover 201, which is installed at the bottom of the heat insulation protective cover 101. The air guide cover 201 has an inner cavity 202, an air inlet at the bottom, and an air outlet at the top. The air inlet is connected to the air outlet through the inner cavity 202. The position of the air outlet corresponds to the position of the protrusions 102. By combining the upper cover 1 and the lower cover 2, a fully enclosed heat insulation cover structure is formed, which can more effectively achieve the heat insulation effect. The inner wall of the heat insulation shield 101 of the upper cover 1 is provided with multiple protrusions, which can form multiple channels for hot air flow between the heat insulation shield 101 and the three-way catalytic converter. The air guide shroud 201 of the lower cover 2 is provided with an inner cavity 202, an air inlet, and an air outlet. During vehicle operation, the air velocity at the bottom of the lower cover 2 is faster and the pressure is lower; while the air inside the upper cover 1 is heated by the three-way catalytic converter, resulting in a higher temperature and pressure. At this time, under the action of the air pressure difference, the hot air inside the upper cover 1 will be discharged through the inner cavity 202 of the air guide shroud 201, thereby significantly enhancing the heat dissipation effect.

[0032] A first side plate 103 is fixedly connected to the outer surface of the heat insulation cover 101. A first connecting hole is provided on the surface of the first side plate 103 to facilitate the fixation of the heat insulation cover 101 between the bottom of the car and the three-way catalytic converter, thereby achieving the effect of heat insulation protection. A second side plate 203 is fixedly connected to the outer surface of the air guide cover 201. The position of the second side plate 203 corresponds to the position of the first side plate 103. A second connecting hole is provided on the surface of the second side plate 203 to facilitate the installation of the air guide cover below the three-way catalytic converter. Combined with the heat insulation cover 101, it forms a fully enclosed structure, which can achieve a better heat insulation effect.

[0033] The heat insulation cover 101 is composed of an inner layer of aluminized steel plate, a middle layer of ceramic fiber, and an outer layer of aluminized steel plate. It can block the high-temperature radiation of the three-way catalytic converter and protect the surrounding components from high temperature. The air guide cover 201 is made of aluminized steel plate. The inner surface of the air guide cover 201 is provided with a grid-like reinforcing rib, which can ensure the structural strength of the air guide cover 201 and enable it to be stably installed at the bottom of the heat insulation cover 101.

[0034] Working Principle: When a car engine is running, the three-way catalytic converter generates a large amount of heat, causing its surface temperature to rise sharply. At this time, the heat shield, through its three-layer composite structure of an inner layer of aluminized steel plate, a middle layer of ceramic fiber, and an outer layer of aluminized steel plate, effectively blocks the diffusion of high-temperature radiation to the surrounding environment. Simultaneously, multiple protrusions on the inner wall of the heat shield create gaps with the surface of the three-way catalytic converter, forming a channel for hot air to rise. When the vehicle is moving, the air guide at the bottom of the lower shield creates a negative pressure zone due to increased airflow velocity, while the heated air inside the upper shield creates a positive pressure zone due to decreased density. Driven by this pressure difference, hot air enters the inner cavity through the air inlet at the bottom of the air guide and is discharged to the outside environment through the air outlet. Because the outlet position corresponds to the protrusions on the inner wall of the heat shield, a directional heat dissipation channel is formed, accelerating the efficiency of hot air discharge. The mesh-like reinforcing ribs on the inner surface of the air guide ensure structural strength while reducing airflow resistance, further improving heat dissipation performance. This fully enclosed structural design and airflow guidance mechanism not only achieves effective heat insulation protection for the three-way catalytic converter, but also enhances the heat dissipation effect through active airflow circulation.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lightweight thermal shield structure for a three-way catalyst, comprising an upper shield (1), characterized in that: The bottom of the upper cover (1) is equipped with a lower cover (2). The upper cover (1) includes a heat insulation protective cover (101). The inner wall of the heat insulation protective cover (101) is fixedly connected with a protrusion (102), and there are multiple protrusions (102). The lower cover (2) includes an air guide cover (201). The air guide cover (201) is installed at the bottom of the heat insulation protective cover (101). The air guide cover (201) has an inner cavity (202) inside. The bottom of the air guide cover (201) is provided with an air inlet, and the top of the air guide cover (201) is provided with an air outlet. The air inlet is connected to the air outlet through the inner cavity (202).

2. The lightweight three-way catalytic converter heat shield structure according to claim 1, characterized in that: The position of the air outlet corresponds to the position of the protrusion (102).

3. The lightweight three-way catalytic converter heat shield structure according to claim 1, characterized in that: The outer surface of the heat insulation protective cover (101) is fixedly connected to a first side plate (103), and the surface of the first side plate (103) is provided with a first connection hole.

4. The lightweight three-way catalytic converter heat shield structure according to claim 3, characterized in that: The outer surface of the air guide cover (201) is fixedly connected to a second side plate (203). The position of the second side plate (203) corresponds to the position of the first side plate (103). A second connecting hole is provided on the surface of the second side plate (203). The position of the second connecting hole corresponds to the position of the first connecting hole.

5. The lightweight three-way catalytic converter heat shield structure according to claim 1, characterized in that: The heat insulation protective cover (101) is composed of an inner layer of aluminum-plated steel plate, a middle layer of ceramic fiber, and an outer layer of aluminum-plated steel plate.

6. The lightweight three-way catalytic converter heat shield structure according to claim 1, characterized in that: The air guide cover (201) is made of aluminum-plated steel plate, and the inner surface of the air guide cover (201) is provided with grid-like reinforcing ribs.

Images