Mixed discharge silencer of hydrogen fuel cell

Abstract

The utility model discloses a mixed exhaust silencer for a hydrogen fuel cell. The mixed exhaust silencer comprises a barrel body, the rear end cover is arranged at the opening end of the cylinder body; the air / water inlet is formed in the cylinder body and is positioned at one end far away from the rear end cover; the exhaust / drainage port a is formed in the rear end cover; the first-stage silencing structure is positioned in the barrel body and is positioned between the air inlet / water inlet and the air outlet / water outlet a; the secondary silencing structure comprises an auxiliary expansion chamber located between the cylinder body and the primary silencing structure, a plurality of evenly-distributed exhaust / drainage openings b are formed in the side wall of the rear end cover and located on the outer side of the exhaust / drainage opening a, and sound insulation cotton is arranged on the side wall of the cylinder body. A water outlet of the exhaust / drainage port b is formed in the end face of the rear end cover 2, multi-angle drainage can be achieved, the situation that the placing position of the silencer is affected by a drainage pipe of the silencer is avoided, installation is convenient, and universality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen fuel cells, and specifically relates to a hydrogen fuel cell mixed exhaust muffler. Background Technique

[0002] A hydrogen fuel cell is a device that converts the chemical energy of fuel into electrical energy, and it is a truly pollution-free and highly efficient battery. The waste gas that does not participate in the reaction and the waste water generated after the reaction in the stack will be discharged through the mixed exhaust system. As the battery power increases, the flow rate of the reaction gas speeds up, and together with the additional noise from the air compressor, etc., the noise at the tail exhaust outlet is very large, causing a certain amount of noise pollution.

[0003] The existing mixed exhaust mufflers are mainly resistive, reactive, and impedance composite types, and corresponding expansion chambers and sound insulation materials are designed. Some of them are designed with drain ports to prevent the accumulation of water and affect the noise reduction performance. However, although a single drain port can discharge the waste water in the cavity, the placement position of the muffler is affected by its own drain pipe, resulting in inconvenient installation and low universality. Therefore, a hydrogen fuel cell mixed exhaust muffler is provided. Content of the Utility Model

[0004] The purpose of the utility model is to provide a hydrogen fuel cell mixed exhaust muffler to solve the problems that the placement position of the muffler is affected by its own drain pipe, resulting in inconvenient installation and low universality.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A hydrogen fuel cell mixed exhaust muffler, comprising:

[0006] A cylinder body;

[0007] A rear end cover, arranged at the open end of the cylinder body;

[0008] An air inlet / water inlet, arranged on the cylinder body and at one end far from the rear end cover;

[0009] An exhaust / drain port a, arranged on the rear end cover;

[0010] A primary sound insulation structure, located inside the cylinder body and between the air inlet / water inlet and the exhaust / drain port a;

[0011] A secondary sound insulation structure, including a secondary expansion chamber located between the cylinder body and the primary sound insulation structure. A plurality of uniformly distributed exhaust / drain ports b are arranged on the side wall of the rear end cover and outside the exhaust / drain port a, and sound insulation cotton is arranged on the side wall of the cylinder body.

[0012] Preferably, the primary sound-absorbing structure includes a connection channel disposed between the air / water inlet and the exhaust / drain port a, and a plurality of main expansion chambers are provided on the connection channel, and a plurality of uniformly distributed exhaust / drain ports c are provided on the side wall of the main expansion chamber.

[0013] Preferably, the cylinder body includes a front end cover and a double-layer heat-insulating layer, the front end cover and the double-layer heat-insulating layer are welded together, and the sound-absorbing cotton is located between the double-layer heat-insulating layers.

[0014] Preferably, four exhaust / drain ports b are provided and are uniformly arranged along the arc surface of the rear end cover.

[0015] Preferably, the cylinder body, the rear end cover, the air / water inlet, the exhaust / drain port a, the primary sound-absorbing structure and the secondary sound-absorbing structure are made of an integral material.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: A hydrogen fuel cell mixed exhaust muffler provided by the present utility model, the unreacted waste gas and waste water of the fuel cell stack will enter the primary sound-absorbing structure through the air / water inlet for primary sound absorption. Among them, the exhaust / drain port c of the main expansion chamber will discharge a certain amount of accumulated water and waste gas, ensuring that the primary sound-absorbing structure is not affected by the accumulated water; the waste gas and waste water discharged from the exhaust / drain port c of the main expansion chamber will enter the secondary expansion chamber for secondary sound absorption; the exhaust / drain port b is opened on the rear end cover to discharge the waste gas and waste water generated in the secondary expansion chamber. After the waste gas and waste water are subjected to two-stage sound absorption, they are discharged. The water outlet of the exhaust / drain port b is opened on the end face of the rear end cover 2, which can drain water from multiple angles, avoiding the influence of the position of the muffler by its own drain pipe, facilitating installation, and having high universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an axial sectional view schematic diagram of the present utility model;

[0018] Figure 2 is an axonometric view schematic diagram of the present utility model;

[0019] Figure 3 is an axonometric view of the primary sound-absorbing structure of the present utility model.

[0020] In the figure: 1-1, front end cover, 1-2, heat-insulating layer; 2, rear end cover; 3, air / water inlet; 4, exhaust / drain port a; 5-1, connection channel; 5-2, main expansion chamber; 5-3, exhaust / drain port c; 6-1, secondary expansion chamber; 6-2, exhaust / drain port b; 6-3, sound-absorbing cotton. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-3 , the present utility model provides a technical solution: a hydrogen fuel cell hybrid exhaust silencer, including a cylinder body; a rear end cover 2 is arranged at the opening end of the cylinder body; an air inlet / water inlet 3 is arranged on the cylinder body and at one end far from the rear end cover 2; an exhaust / drainage port a 4 is arranged on the rear end cover 2; a primary silencing structure is located inside the cylinder body and between the air inlet / water inlet 3 and the exhaust / drainage port a 4; a secondary silencing structure includes a secondary expansion chamber 6-1 located between the cylinder body and the primary silencing structure, and a plurality of uniformly distributed exhaust / drainage ports b 6-2 are arranged on the side wall of the rear end cover 2 and outside the exhaust / drainage port a 4, and a sound insulation cotton 6-3 is arranged on the side wall of the cylinder body. By arranging the sound insulation cotton 6-3, secondary silencing is realized. The unreacted waste gas and waste water of the fuel cell stack will enter the primary silencing structure through the air inlet / water inlet 3 for primary silencing. The exhaust / drainage port c 5-3 of the main expansion chamber 5-2 will discharge a certain amount of accumulated water and waste gas, ensuring that the primary silencing structure is not affected by the accumulated water; the waste gas and waste water discharged from the exhaust / drainage port c 5-3 of the main expansion chamber 5-2 will enter the secondary expansion chamber 6-1 to achieve secondary silencing; the exhaust / drainage port b 6-2 is opened on the rear end cover 2 to discharge the waste gas and waste water generated in the secondary expansion chamber 6-1. The waste gas and waste water are discharged after two-stage silencing. The water outlet of the exhaust / drainage port b 6-2 is opened on the end face of the rear end cover 2, which can drain water at multiple angles, avoiding the influence of the position of the silencer by its own drain pipe, facilitating installation and having high universality.

[0023] Specifically, the primary silencing structure includes a connection channel 5-1 arranged between the air inlet / water inlet 3 and the exhaust / drainage port a 4. A plurality of main expansion chambers 5-2 are arranged on the connection channel 5-1. A plurality of uniformly distributed exhaust / drainage ports c 5-3 are arranged on the side wall of the main expansion chamber 5-2. The primary silencing is realized through the cooperation of the connection channel 5-1 between the air inlet / water inlet 3 and the exhaust / drainage port a 4 and the exhaust / drainage port c 5-3. At the same time, the primary silencing structure has a simple structure, low back pressure and does not need to be repaired after one-time forming.

[0024] Specifically, the cylinder body includes a front end cover 1-1 and a double-layer heat insulation layer 1-2. The front end cover 1-1 and the double-layer heat insulation layer 1-2 are welded together. The sound insulation cotton 6-3 is located between the double-layer heat insulation layer 1-2, preventing the sound insulation material from coming into direct contact with waste gas and waste water, which may cause the sound insulation effect to decline over time. By setting the double-layer heat insulation layer 6-3, it is possible to avoid the high temperature of the mixed drainage and water vapor during the high-power operation of the hydrogen fuel cell, which is likely to cause accidental burns, thus ensuring the anti-scald safety during use.

[0025] Specifically, there are four exhaust / drainage ports b6-2, which are evenly arranged along the arc surface of the rear end cover 2. By setting the water outlet of the four exhaust / drainage ports b6-2 on the end face of the rear end cover 2, it is possible to drain water from multiple angles, with high universality.

[0026] Specifically, the cylinder body, the rear end cover 2, the air inlet / water inlet 3, the exhaust / drainage port a4, the primary sound absorption structure, and the secondary sound absorption structure are made of an integral material, with an integrated design of sound insulation and anti-scalding, which can save materials, reduce weight, and improve utilization efficiency.

[0027] Working principle: During the use of the present utility model, the unreacted waste gas and waste water from the fuel cell stack will enter the primary sound absorption structure through the air inlet / water inlet 3 for primary sound absorption. The exhaust / drainage port c5-3 of the main expansion chamber 5-2 will discharge a certain amount of accumulated water and waste gas, ensuring that the primary sound absorption structure is not affected by the accumulated water. The waste gas and waste water discharged from the exhaust / drainage port c5-3 of the main expansion chamber 5-2 will enter the secondary expansion chamber 6-1 for secondary sound absorption. The rear end cover 2 is provided with an exhaust / drainage port b6-2 for discharging the waste gas and waste water generated in the secondary expansion chamber 6-1. After the waste gas and waste water are subjected to two-stage sound absorption, they are discharged. The water outlet of the exhaust / drainage port b6-2 is located on the end face of the rear end cover 2, enabling drainage from multiple angles.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding in the existing technology. The machinery, parts, and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be elaborated here.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen fuel cell mixed discharge muffler, characterized in that: include: Cylinder; A rear end cover (2) is arranged at the open end of the cylinder; An air / water inlet (3) is arranged on the cylinder and is located at an end away from the rear end cover (2); An exhaust / drain port a (4) is provided on the rear end cover (2); A first-level silencer structure is located inside the cylinder and between the air / water inlet (3) and the exhaust / drainage outlet a (4); The secondary silencer structure comprises a secondary expansion chamber (6-1) located between a cylinder and a primary silencer structure, a plurality of evenly distributed exhaust / drain ports b (6-2) are arranged on the side wall of the rear end cover (2) and outside the exhaust / drain port a (4), and sound insulation cotton (6-3) is arranged on the side wall of the cylinder.

2. A hydrogen fuel cell mixed discharge muffler according to claim 1, characterized in that: The primary silencer structure comprises a connecting channel (5-1) arranged between an air / water inlet (3) and an exhaust / drainage outlet a (4), the connecting channel (5-1) being provided with a plurality of main expansion chambers (5-2), and the side wall of the main expansion chamber (5-2) being provided with a plurality of evenly distributed exhaust / drainage outlets c (5-3).

3. A hydrogen fuel cell mixed discharge muffler according to claim 1, characterized in that: The cylinder comprises a front end cover (1-1) and a double-layer anti-scalding insulation layer (1-2); the front end cover (1-1) and the double-layer anti-scalding insulation layer (1-2) are welded together, and the sound insulation cotton (6-3) is located between the double-layer anti-scalding insulation layer (1-2).

4. A hydrogen fuel cell mixed discharge muffler according to claim 1, characterized in that: There are four exhaust / drain ports b (6-2) arranged evenly along the arc-shaped surface of the rear end cover (2).

5. A hydrogen fuel cell mixed discharge muffler according to claim 1, characterized in that: The cylinder, the rear end cover (2), the air / water inlet (3), the exhaust / drain outlet a (4), the primary silencer structure and the secondary silencer structure are made of a single material.

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