Parallel type automobile exhaust heat exchanger

Abstract

The utility model belongs to the technical field of exhaust heat exchangers, and particularly relates to a parallel type automobile exhaust heat exchanger which comprises an exhaust pipe connected to the exhaust end of an engine, and a first three-way catalyst and a heat exchanger assembly are arranged at one end of the exhaust pipe in parallel. The heat exchanger assembly comprises a heat exchange tank and a heat exchange coil pipe connected with an automobile cooling system in series, the heat exchange coil pipe is arranged in the heat exchange tank, a second three-way catalyst used for gas catalysis is arranged at the end, away from the exhaust pipe, of the heat exchange coil pipe, and an adjusting piece used for gas on-off adjustment is arranged between the exhaust pipe and the heat exchange tank. Due to the fact that the heat exchanger assemblies which are installed in parallel with the three-way catalytic converter are additionally arranged, part of high-temperature waste gas can enter the heat exchanger assemblies which are connected in parallel, and the waste gas passing through the first three-way catalytic converter is prevented from being affected by the heat exchanger assemblies.

Description

Technical Field

[0001] The utility model belongs to the technical field of exhaust heat exchangers, and in particular relates to a parallel automobile exhaust heat exchanger. Background Art

[0002] Of the energy generated by fuel consumption in a car, about 40% is discharged from the exhaust gas in the form of waste heat. In order to effectively utilize the waste heat, a heat exchanger is generally connected in series to the exhaust pipe. The heat in the waste heat is used to heat the coolant, so that the coolant can reach the optimal working condition in a short time. Since the heat exchanger is connected in series to the exhaust pipe, the heat exchanger is exposed to high-temperature exhaust gas for a long time, causing the coolant temperature to be too high, affecting the vehicle condition. In addition, since the heat exchanger is connected in series to the exhaust pipe, the temperature of the gas passing through the three-way catalytic converter is reduced, thereby affecting the filtering effect of the three-way catalytic converter and greatly reducing the practicality of the equipment. Utility Model Content

[0003] The purpose of the utility model is to provide a parallel automobile exhaust heat exchanger to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a parallel automobile exhaust heat exchanger, comprising: an exhaust pipe connected to the exhaust end of the engine, one end of the exhaust pipe is provided with a first three-way catalytic converter and a heat exchanger assembly in parallel, the heat exchanger assembly comprises a heat exchange tank and a heat exchange coil connected in series with the automobile cooling system, the heat exchange coil is arranged in the heat exchange tank, and the end of the heat exchange coil away from the exhaust pipe is provided with a second three-way catalytic converter for gas catalysis.

[0005] Preferably, a regulating member for regulating the on-off of gas is provided between the exhaust pipe and the heat exchange tank, and the regulating member is a solenoid valve.

[0006] Preferably, a first exhaust branch pipe and a second exhaust branch pipe are arranged in parallel at one end of the exhaust pipe, a three-way joint for connection is provided between the exhaust pipe and the first exhaust branch pipe and the second exhaust branch pipe, and the three-way catalytic converter and the heat exchange tank are respectively arranged on the first exhaust branch pipe and the second exhaust branch pipe.

[0007] Preferably, connecting mechanisms are provided between both ends of the heat exchange tank and the second exhaust branch pipe, and the two connecting mechanisms are used to detachably connect the heat exchange tank in series to the second exhaust branch pipe.

[0008] Preferably, the connecting mechanism includes a threaded butt-threaded sleeve and an external threaded joint, the external threaded joint is welded to the end of the heat exchange tank, the butt-threaded sleeve is sleeved on the second exhaust branch pipe, the end of the second exhaust branch pipe is provided with a butt flange, and a clamping space for accommodating the butt-threaded sleeve and the external threaded joint is formed between the butt-threaded sleeve and the external threaded joint.

[0009] Preferably, a first heat exchange interface and a second heat exchange interface communicating with both ends of the heat exchange tank are provided outside the heat exchange tank, and a cooling liquid inlet pipe and a cooling liquid outlet pipe respectively docked with the first heat exchange interface and the second heat exchange interface are provided in the vehicle cooling system.

[0010] Compared with the prior art, the present utility model has the following beneficial effects:

[0011] (1) By adding a heat exchanger assembly installed in parallel with the three-way catalytic converter, the present utility model allows part of the high-temperature exhaust gas to enter the parallel heat exchanger assembly, avoiding the influence of the heat exchanger assembly on the exhaust gas passing through the first three-way catalytic converter.

[0012] (2) By adding a solenoid valve, the solenoid valve can be used to adjust and control the exhaust gas entering the heat exchange tank, thereby avoiding the overloading operation of the vehicle cooling system.

[0013] (3) By adding two connecting mechanisms, the heat exchange tank can be detachably installed in the second exhaust gas branch pipe, which is convenient for overhauling and replacing the heat exchange tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic structural diagram of the heat exchanger assembly of the present utility model;

[0016] Figure 3 is a three-dimensional view of the second heat exchange interface and the docking flange of the present utility model;

[0017] In the figure: 1, exhaust pipe; 2, first three-way catalytic converter; 3, first exhaust gas branch pipe; 4, second exhaust gas branch pipe; 5, first heat exchange interface; 6, cooling liquid inlet pipe; 7, heat exchange tank; 8, cooling liquid outlet pipe; 9, second heat exchange interface; 10, docking threaded sleeve; 11, solenoid valve; 12, three-way joint; 13, docking flange; 14, heat exchange coil; 15, external threaded joint; 16, second three-way catalytic converter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to 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.

[0019] Refer to Figure 1-2As shown, a parallel-type automotive exhaust heat exchanger provided by the present utility model includes: an exhaust pipe 1 connected to the exhaust end of the engine. At one end of the exhaust pipe 1, a first three-way catalytic converter 2 and a heat exchanger assembly are arranged in parallel. The heat exchanger assembly includes a heat exchange tank 7 and a heat exchange coil 14 connected in series with the automotive cooling system. The heat exchange coil 14 is arranged in the heat exchange tank 7, and at one end of the heat exchange coil 14 away from the exhaust pipe 1, a second three-way catalytic converter 16 for gas catalysis is provided.

[0020] Combined with Figure 1 As shown, at one end of the exhaust pipe 1, a first exhaust branch pipe 3 and a second exhaust branch pipe 4 are arranged in parallel. A three-way joint 12 for connection is provided between the exhaust pipe 1 and the first exhaust branch pipe 3 and the second exhaust branch pipe 4. The three-way catalytic converter 2 and the heat exchange tank 7 are respectively arranged on the first exhaust branch pipe and the second exhaust branch pipe 4.

[0021] As described above, when using the exhaust pipe 1, the first three-way catalytic converter 2 and the heat exchanger assembly provided by the present utility model, the first exhaust branch pipe 3 and the second exhaust branch pipe 4 can be conveniently installed in parallel at one end of the exhaust pipe 1 through the three-way joint 12. The first exhaust branch pipe 3 and the second exhaust branch pipe 4 provide installation positions for the first three-way catalytic converter 2, the heat exchange tank 7 and the second three-way catalytic converter 16. The gas discharged from the exhaust pipe 1 can be shunted through the first exhaust branch pipe and the second exhaust branch pipe 4, allowing part of the waste gas to exchange heat with the heat exchange coil 14 in the heat exchange tank 7, and allowing most of the waste gas to pass through the first three-way catalytic converter 2, avoiding the reduction of the temperature of the waste gas passing through the first three-way catalytic converter 2 and the reduction of the catalytic effect of the first three-way catalytic converter 2.

[0022] Furthermore, in order to facilitate the connection between the heat exchange coil 14 and the automotive cooling system, referring to Figure 1-2 As shown, outside the heat exchange tank 7, a first heat exchange interface 5 and a second heat exchange interface 9 communicating with both ends of the heat exchange tank 7 are provided. In the automotive cooling system, there are two cooling inlet pipes 6 and cooling outlet pipes 8 respectively docked with the first heat exchange interface 5 and the second heat exchange interface 9. Through the first heat exchange interface 5 and the second heat exchange interface 9, it is convenient to connect the cooling inlet pipe 6 and the cooling outlet pipe 8 in the automotive cooling system with the heat exchange coil 14, and the waste gas can heat the passing coolant through the heat exchange coil 14.

[0023] In the present utility model, combined with Figure 1 As shown, between the exhaust pipe 1 and the heat exchange tank 7 of this embodiment, an adjusting member for gas on-off adjustment is provided, and the adjusting member is an electromagnetic valve 11.

[0024] As described above, when using the adjusting member provided by the present utility model, when the coolant temperature reaches a predetermined threshold, the electromagnetic valve 11 closes, thereby preventing the waste gas from entering the second exhaust branch pipe 4.

[0025] In the present utility model, combined with Figure 1As shown in the figure, connection mechanisms are provided between both ends of the heat exchange tank 7 in this embodiment and the second exhaust branch pipe 4. The two connection mechanisms are used to detachably connect the heat exchange tank 7 in series to the second exhaust branch pipe 4.

[0026] Combined with Figure 2-3 As shown in the figure, the connection mechanism includes a butt joint threaded sleeve 10 and an external threaded joint 15 that are screwed together. The external threaded joint 15 is welded to the end of the heat exchange tank 7. The butt joint threaded sleeve 10 is sleeved on the second exhaust branch pipe 4. A butt joint flange 13 is provided at the end of the second exhaust branch pipe 4. A clamping space for accommodating the butt joint flange 13 is formed between the butt joint threaded sleeve 10 and the external threaded joint 15.

[0027] As described above, when using the connection mechanism provided by the present utility model, place the heat exchange tank 7 between the two butt joint flanges 13. At this time, move the butt joint threaded sleeve 10 towards the side of the heat exchange tank 7. When the butt joint threaded sleeve 10 is screwed onto the external threaded joint 15, the butt joint flange 13 is clamped between the butt joint threaded sleeve 10 and the external threaded joint 15, thereby connecting the heat exchange tank 7 in series to the second exhaust branch pipe 4, which facilitates the replacement and maintenance of the heat exchange tank 7 in the later stage.

[0028] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A parallel-type automotive exhaust heat exchanger, characterized in that, Comprising: An exhaust pipe (1) connected to the exhaust end of the engine. One end of the exhaust pipe (1) is provided with a first three-way catalytic converter (2) and a heat exchanger assembly in parallel. The heat exchanger assembly includes a heat exchange tank (7) and a heat exchange coil (14) connected in series with the vehicle cooling system. The heat exchange coil (14) is arranged in the heat exchange tank (7). One end of the heat exchange coil (14) facing away from the exhaust pipe (1) is provided with a second three-way catalytic converter (16) for gas catalysis.

2. The parallel type automotive exhaust heat exchanger according to claim 1, wherein: An adjusting member for regulating the on-off of the gas is provided between the exhaust pipe (1) and the heat exchange tank (7). The adjusting member is a solenoid valve (11).

3. The parallel - type automotive exhaust heat exchanger according to claim 1, characterized in that: One end of the exhaust pipe (1) is provided with a first exhaust branch pipe (3) and a second exhaust branch pipe (4) in parallel. A three-way joint (12) for connection is provided between the exhaust pipe (1) and the first exhaust branch pipe (3) and the second exhaust branch pipe (4). The three-way catalytic converter (2) and the heat exchange tank (7) are respectively arranged on the first exhaust branch pipe and the second exhaust branch pipe (4).

4. The parallel-type automotive exhaust heat exchanger according to claim 3, characterized in that: Connection mechanisms are provided between both ends of the heat exchange tank (7) and the second exhaust branch pipe (4). The two connection mechanisms are used to detachably connect the heat exchange tank (7) in series on the second exhaust branch pipe (4).

5. The parallel - type automotive exhaust heat exchanger according to claim 4, wherein: The connection mechanism includes a butt joint threaded sleeve (10) and an external threaded joint (15) connected by screwing. The external threaded joint (15) is welded to the end of the heat exchange tank (7). The butt joint threaded sleeve (10) is sleeved on the second exhaust branch pipe (4). A butt joint flange (13) is provided at the end of the second exhaust branch pipe (4). A clamping space for accommodating the butt joint flange (13) is formed between the butt joint threaded sleeve (10) and the external threaded joint (15).

6. The parallel - type automotive exhaust heat exchanger according to claim 1, wherein: A first heat exchange interface (5) and a second heat exchange interface (9) communicating with both ends of the heat exchange tank (7) are provided outside the heat exchange tank (7). Two cooling liquid inlet pipes (6) and cooling liquid outlet pipes (8) respectively docked with the first heat exchange interface (5) and the second heat exchange interface (9) are provided in the vehicle cooling system.

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