Heat exchanger of fuel cell system

Abstract

The utility model relates to the technical field of fuel cells, in particular to a heat exchanger of a fuel cell system, a heat exchanger main body and a heat exchange assembly, the outer wall of the left side of the heat exchanger main body is fixedly connected with a first shunting channel, and the outer wall of the left side of the first shunting channel is provided with a hot gas inlet; the heat exchange assembly used for heat exchange is arranged in the heat exchanger body, and the outer wall of the right side of the first flow dividing channel is connected with a gas inlet and outlet channel. The device has the beneficial effects that generated superheated gas enters the first flow dividing channel through the hot gas inlet, the first flow dividing channel divides the generated superheated gas into four paths, and the four paths of superheated gas enter the gas inlet and outlet channel and then enter the position between the upper exchange channel and the lower exchange channel; gaps between the upper exchange channels and the lower exchange channels form six honeycomb-shaped cavities, so that the contact area with overheated gas is increased, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a heat exchanger of a fuel cell system. Background Art

[0002] A fuel cell is a chemical device that converts the chemical energy of a fuel directly into electrical energy. It is also called an electrochemical generator. It is the fourth power generation technology after hydropower, thermal power generation and nuclear power generation.

[0003] In the prior art, fuel cell vehicles use fuel cells to generate electricity through reactions, while releasing a large amount of heat. Fuel cells are devices that generate electricity based on the reaction of hydrogen and oxygen. The reaction products are mainly water and thermal energy. The existence of thermal energy must be managed by a heat exchanger. However, the heat exchange efficiency of the heat exchanger of the existing fuel cell system is not high, and condensed water will be generated during the heat exchange process, which can easily lead to corrosion of internal parts. Utility Model Content

[0004] The purpose of the utility model is to provide a heat exchanger for a fuel cell system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat exchanger body and a heat exchange component, the left outer wall of the heat exchanger body is fixedly connected with a first diversion channel, and the left outer wall of the first diversion channel is provided with a hot gas inlet, the interior of the heat exchanger body is provided with the heat exchange component for heat exchange, and the heat exchange component includes a gas inlet and outlet channel, an upper exchange channel and a lower exchange channel, the right outer wall of the first diversion channel is connected with the gas inlet and outlet channel, and the right outer wall of the gas inlet and outlet channel is provided with an upper exchange channel and a lower exchange channel in sequence from top to bottom.

[0006] Preferably, four groups of heat exchange components are provided, and the vertical center axis of the upper exchange channel and the lower exchange channel is consistent with the vertical center axis of the heat exchanger body.

[0007] Preferably, a liquid water inlet and a liquid water outlet are provided on the top outer wall of the gas inlet and outlet channel, and the liquid water inlet is provided on the left side of the gas inlet and outlet channel and the upper exchange channel.

[0008] Preferably, the liquid water outlet is arranged on the right side of the upper exchange channel and the lower exchange channel, and a liquid water manifold is arranged between the upper and lower gas inlet and outlet channels.

[0009] Preferably, a condensate discharge assembly for discharging condensate is provided on the rear outer wall of the heat exchanger body, and the condensate discharge assembly includes a collecting tank, a collecting pipe and a drain pipe, a collecting pipe is provided inside the collecting tank, and a drain pipe is provided on the left outer wall of the collecting tank.

[0010] Preferably, the front end of the collecting tube is connected to the inner wall of the heat exchanger body, and the height of the bottom outer wall of the collecting tube is consistent with the height of the top outer wall of the lower exchange channel.

[0011] Preferably, a second bypass channel is provided on the right outer wall of the heat exchanger body, and a cold gas outlet is provided on the right outer wall of the second bypass channel.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The heat exchanger of the fuel cell system proposed by the utility model generates superheated gas which enters the interior of the first diversion channel through the hot gas inlet. The first diversion channel diverts the generated superheated gas into four paths. The four paths of superheated gas enter the interior of the gas inlet and outlet channel and then enter between the upper exchange channel and the lower exchange channel. The gap between the upper exchange channel and the lower exchange channel forms six honeycomb-shaped cavities, thereby increasing the contact area with the superheated gas and improving the efficiency of heat exchange.

[0014] In the heat exchanger of the fuel cell system proposed by the utility model, condensed water will be generated on the outer walls of the upper exchange channel and the lower exchange channel. The condensed water will gather on the top outer wall of the lower exchange channel, then enter the collecting pipe through the collecting pipe connected to the lower exchange channel, and then be discharged to the outside of the heat exchanger body through the drain pipe. After the heat exchange, the cold air will be discharged to the outside of the heat exchanger body through the second diversion channel and the cold gas outlet. Timely drainage can prevent the upper exchange channel and the lower exchange channel from corrosion, which is beneficial to extending the service life of the upper exchange channel and the lower exchange channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall disassembly of the structure of the utility model;

[0017] Figure 3 It is a three-dimensional schematic diagram of the heat exchange component of the utility model structure.

[0018] In the figure: 1. heat exchanger body; 2. first diversion channel; 3. hot gas inlet; 4. heat exchange component; 401. gas inlet and outlet channel; 402. upper exchange channel; 403. lower exchange channel; 5. liquid water inlet; 6. liquid water outlet; 7. liquid water diversion pipe; 8. condensate discharge component; 801. collection tank; 802. collection pipe; 803. drain pipe; 9. second diversion channel; 10. cold gas outlet. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1

[0021] A heat exchanger body 1 and a heat exchange component 4, the left outer wall of the heat exchanger body 1 is fixedly connected with a first shunt channel 2, and the left outer wall of the first shunt channel 2 is provided with a hot gas inlet 3, a heat exchange component 4 for heat exchange is provided inside the heat exchanger body 1, and the heat exchange component 4 includes a gas inlet and outlet channel 401, an upper exchange channel 402 and a lower exchange channel 403, the right outer wall of the first shunt channel 2 is connected with the gas inlet and outlet channel 401, and the right outer wall of the gas inlet and outlet channel 401 is sequentially provided with an upper exchange channel 402 and a lower exchange channel 403 from top to bottom, and the heat exchange component 4 is provided with four groups, and the vertical central axis of the upper exchange channel 402 and the lower exchange channel 403 is consistent with the vertical central axis of the heat exchanger body 1;

[0022] See also Figures 1 to 3 The utility model provides a technical solution: the generated superheated gas enters the interior of the first shunt channel 2 through the hot gas inlet 3, and the first shunt channel 2 shunts the generated superheated gas into four paths. The four paths of superheated gas enter the interior of the gas inlet and outlet channel 401, and then enter between the upper exchange channel 402 and the lower exchange channel 403. The gap between the upper exchange channel 402 and the lower exchange channel 403 forms six honeycomb-shaped cavities, thereby increasing the contact area with the superheated gas and improving the efficiency of heat exchange;

[0023] Liquid water enters the gas inlet and outlet channel 401 through the liquid water inlet 5 and enters the interior of the upper exchange channel 402 and the interior of the lower exchange channel 403. The outer wall temperature of the upper exchange channel 402 and the lower exchange channel 403 is lower than the temperature of the hot air. The upper exchange channel 402 and the lower exchange channel 403 exchange heat with the superheated gas, thereby achieving cooling of the superheated gas.

[0024] Embodiment 2

[0025] The top outer wall of the gas inlet and outlet channel 401 is provided with a liquid water inlet 5 and a liquid water outlet 6, and the liquid water inlet 5 is provided on the left side of the gas inlet and outlet channel 401 and the upper exchange channel 402, and the liquid water outlet 6 is provided on the right side of the upper exchange channel 402 and the lower exchange channel 403. A liquid water manifold 7 is provided between the upper and lower gas inlet and outlet channels 401. A condensed water discharge assembly 8 for discharging condensed water is provided on the rear outer wall of the heat exchanger body 1, and the condensed water discharge assembly 8 includes a collection A collecting tank 801, a collecting pipe 802 and a drain pipe 803. The collecting tank 801 is provided with the collecting pipe 802 inside, and the left outer wall of the collecting tank 801 is provided with the drain pipe 803. The front end of the collecting pipe 802 is connected to the inner wall of the heat exchanger body 1, and the height of the bottom outer wall of the collecting pipe 802 is consistent with the height of the top outer wall of the lower exchange channel 403. The right outer wall of the heat exchanger body 1 is provided with a second shunt channel 9, and the right outer wall of the second shunt channel 9 is provided with a cold gas outlet 10;

[0026] On the basis of the first embodiment, liquid water enters a group of upper exchange channels 402 and lower exchange channels 403 through the liquid water inlet 5, and then enters the next group of upper exchange channels 402 and lower exchange channels 403 through the liquid water manifold 7, and then is discharged through the liquid water outlet 6 after heat exchange, and is circulated and cooled outside the heat exchanger body 1, thereby realizing continuous heat exchange with the superheated gas;

[0027] After the upper exchange channel 402 and the lower exchange channel 403 exchange heat, condensed water will be generated on the outer walls of the upper exchange channel 402 and the lower exchange channel 403. The condensed water gathers on the top outer wall of the lower exchange channel 403, and then enters the collecting pipe 802 through the collecting pipe 802 connected to the lower exchange channel 403, and is then discharged to the outside of the heat exchanger body 1 through the drain pipe 803. After the heat exchange, the cold air is discharged to the outside of the heat exchanger body 1 through the second diversion channel 9 and the cold gas outlet 10. Timely drainage can prevent the upper exchange channel 402 and the lower exchange channel 403 from corrosion, which is beneficial to extending the service life of the upper exchange channel 402 and the lower exchange channel 403.

[0028] In actual use, the generated superheated gas enters the interior of the first shunt channel 2 through the hot gas inlet 3, and the first shunt channel 2 shunts the generated superheated gas into four paths. The four paths of superheated gas enter the interior of the gas inlet and outlet channel 401, and then enter between the upper exchange channel 402 and the lower exchange channel 403. The gap between the upper exchange channel 402 and the lower exchange channel 403 forms six honeycomb cavities. Liquid water enters the gas inlet and outlet channel 401 through the liquid water inlet 5 and enters the interior of the upper exchange channel 402 and the interior of the lower exchange channel 403. The outer wall temperature of the upper exchange channel 402 and the lower exchange channel 403 is lower than the temperature of the hot air, and the upper exchange channel 402 and the lower exchange channel 403 exchange heat with the superheated gas.

[0029] Liquid water enters the interior of a group of upper exchange channels 402 and lower exchange channels 403 through the liquid water inlet 5, and then enters the interior of the next group of upper exchange channels 402 and lower exchange channels 403 through the liquid water diverter 7, and is discharged through the liquid water outlet 6 after heat exchange. After the upper exchange channels 402 and the lower exchange channels 403 exchange heat, condensed water will be generated on the outer walls of the upper exchange channels 402 and the lower exchange channels 403. The condensed water gathers on the top outer wall of the lower exchange channel 403, and then enters the collecting pipe 802 through the collecting pipe 802 connected to the lower exchange channel 403, and is then discharged to the outside of the heat exchanger body 1 through the drain pipe 803. After the heat exchange, the cold air is discharged to the outside of the heat exchanger body 1 through the second diverter channel 9 and the cold gas outlet 10.

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

Claims

1. A heat exchanger for a fuel cell system, comprising a heat exchanger body (1) and a heat exchange assembly (4), characterized in that: The left outer wall of the heat exchanger body (1) is fixedly connected to a first flow diversion channel (2), and the left outer wall of the first flow diversion channel (2) is provided with a hot gas inlet (3). The heat exchange component (4) for heat exchange is provided inside the heat exchanger body (1), and the heat exchange component (4) comprises a gas inlet and outlet channel (401), an upper exchange channel (402) and a lower exchange channel (403). The right outer wall of the first flow diversion channel (2) is connected to the gas inlet and outlet channel (401), and the right outer wall of the gas inlet and outlet channel (401) is provided with an upper exchange channel (402) and a lower exchange channel (403) in sequence from top to bottom.

2. The heat exchanger of a fuel cell system according to claim 1, characterized in that: The heat exchange assembly (4) is provided in four groups, and the vertical center axis of the upper exchange channel (402) and the lower exchange channel (403) is consistent with the vertical center axis of the heat exchanger body (1).

3. The heat exchanger of a fuel cell system according to claim 2, characterized in that: The top outer wall of the gas inlet and outlet channel (401) is provided with a liquid water inlet (5) and a liquid water outlet (6), and the liquid water inlet (5) is arranged on the left side of the gas inlet and outlet channel (401) and the upper exchange channel (402).

4. The heat exchanger of a fuel cell system according to claim 3, characterized in that: The liquid water outlet (6) is arranged on the right side of the upper exchange channel (402) and the lower exchange channel (403), and a liquid water manifold (7) is arranged between the upper and lower gas inlet and outlet channels (401).

5. The heat exchanger of a fuel cell system according to claim 1, characterized in that: The rear outer wall of the heat exchanger body (1) is provided with a condensate discharge assembly (8) for discharging condensate, and the condensate discharge assembly (8) comprises a collecting tank (801), a collecting pipe (802) and a drain pipe (803), the collecting tank (801) is provided with a collecting pipe (802) inside, and the left outer wall of the collecting tank (801) is provided with a drain pipe (803).

6. The heat exchanger of a fuel cell system according to claim 5, characterized in that: The front end of the collecting tube (802) is connected to the inner wall of the heat exchanger body (1), and the height of the bottom outer wall of the collecting tube (802) is consistent with the height of the top outer wall of the lower exchange channel (403).

7. The heat exchanger of a fuel cell system according to claim 1, characterized in that: The right outer wall of the heat exchanger body (1) is provided with a second flow diversion channel (9), and the right outer wall of the second flow diversion channel (9) is provided with a cold gas outlet (10).

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