Low-temperature starting auxiliary machine heat exchanger for special vehicle

Abstract

The utility model discloses a low-temperature starting auxiliary machine heat exchanger for a special vehicle, which comprises a plurality of gas-liquid plate type heat exchanger cores arranged in parallel in a heat exchange box, and an air inlet pipe and an exhaust pipe are respectively arranged on two side plates in the length direction of the heat exchange box; core bodies of the gas-liquid plate type heat exchanger are fixed to an end plate on the front side of the heat exchange box, a first water collecting box and a second water collecting box are arranged at the upper end and the lower end of the end plate respectively, a water inlet pipe and a water outlet pipe are arranged on the first water collecting box and the second water collecting box respectively, and a first water collecting chamber and a second water collecting chamber are formed between the first water collecting box and the end plate and between the second water collecting box and the end plate respectively. A water inlet and a water outlet in the two ends of the gas-liquid plate type heat exchanger core communicate with the first water collecting chamber and the second water collecting chamber through pipe joints correspondingly, and heat exchange plates of the gas-liquid plate type heat exchanger core are spaced from one another and form gas heat exchange channels. The heat exchanger has the advantages of being high in heat exchange efficiency and good in heat exchange effect, improving the temperature of the working environment of the engine, achieving low-temperature starting of the engine and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger for a special vehicle low-temperature starting auxiliary engine. Background Art

[0002] In order to solve the problem that the automobile engine is difficult to start in a low-temperature environment, antifreeze is usually added to the cooling device of the automobile. However, the antifreeze only lowers the freezing point of the coolant to prevent the coolant from freezing and cracking the cooling device. The actual temperatures of the engine oil and the coolant are still very low, and it is still relatively difficult to start the automobile. The heat exchanger for the low-temperature starting auxiliary engine utilizes the heat of the exhaust gas of the auxiliary engine to heat the cooling water of the main engine, achieving the effect of secondary utilization of the hot gas and starting the main engine at low temperature. The existing heat exchangers for low-temperature starting auxiliary engines usually use a large plate-fin heat exchanger to achieve the purpose of heat exchange between the engine exhaust gas and the cooling water. However, there are problems such as the heat exchanger being unable to fully utilize the waste heat, low heat exchange efficiency, and poor heat exchange effect. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects, and provide a heat exchanger for a special vehicle low-temperature starting auxiliary engine, which has high heat exchange efficiency, good heat exchange effect, can increase the temperature of the engine working environment, realize the low-temperature starting of the engine, fully utilize the waste heat, save energy and protect the environment, and can effectively solve the problems in the background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a heat exchanger for a special vehicle low-temperature starting auxiliary engine, including a plurality of gas-liquid plate heat exchanger cores arranged in parallel in a heat exchange box. The gas-liquid plate heat exchanger cores are arranged along the length direction of the heat exchange box. The internal cavity of the heat exchange box is a heat exchange cavity. An air inlet pipe and an exhaust pipe are respectively arranged on the two side plates in the length direction of the heat exchange box. The gas-liquid plate heat exchanger cores are all fixed on the end plate at the front side of the heat exchange box. A first water collecting box and a second water collecting box are respectively arranged at the upper and lower ends of the end plate. A water inlet pipe and a water outlet pipe are respectively arranged on the first water collecting box and the second water collecting box. A first water collecting chamber and a second water collecting chamber are respectively formed between the first water collecting box and the second water collecting box and the end plate. The water inlets and outlets at both ends of the gas-liquid plate heat exchanger core are respectively connected to the first water collecting chamber and the second water collecting chamber through pipe joints, and the heat exchange plates of the gas-liquid plate heat exchanger core are spaced from each other to form a gas heat exchange channel.

[0005] Furthermore, the heat exchange plates of the gas-liquid plate heat exchanger core are arranged along the height direction of the heat exchange box. The heat exchange plates are hollow plate-like structures, and the internal cavities of the heat exchange plates are liquid heat exchange channels. Communication holes are provided at both the upper and lower ends of the front side of the heat exchange plate along its thickness direction, and the communication holes of other heat exchange plates except the last one penetrate the heat exchange plates. Communication pipe openings are provided at the periphery of the communication holes on the front end face of the heat exchange plates; the adjacent heat exchange plates in the gas-liquid plate heat exchanger core are closely attached and fixed to each other, and the communication pipe openings on the heat exchange plates correspond to each other; the pipe joints are all fixed on the end plates and penetrate the end plates, and the communication pipe openings of the heat exchange plate at the forefront of the gas-liquid plate heat exchanger core are fixedly nested in the corresponding pipe joints.

[0006] Furthermore, a first partition is provided between two adjacent gas-liquid plate heat exchanger cores in the first water collecting box, and a second partition is provided between two adjacent gas-liquid plate heat exchanger cores in the second water collecting box, and the first partition and the second partition are arranged at intervals alternately.

[0007] Furthermore, a butting protrusion is provided in the middle area of the front side of the heat exchange plate, and the butting protrusion is attached to the heat exchange plate in front of it.

[0008] Furthermore, heat exchange edges extending outwards are provided at the circumferential edges of the front side of the heat exchange plates.

[0009] Furthermore, the heat exchange box and the end plate are of a split structure, and the open end at the front side of the heat exchange box is detachably and fixedly connected to the end plate by bolts.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: In this special vehicle low-temperature start auxiliary engine heat exchanger, the cooling water of the engine and the high-temperature exhaust gas of the engine are heat-exchanged through multiple gas-liquid plate heat exchanger cores, so as to increase the temperature of the working environment of the main engine, thereby achieving the purpose of the main engine starting at low temperature, making full use of waste heat, energy-saving and environmentally friendly; the cooling water in the gas-liquid plate heat exchanger core is divided and flows in each liquid heat exchange channel, and the cooling water in each liquid heat exchange channel of the gas-liquid plate heat exchanger core finally converges to the pipe joints at the water outlet end of the gas-liquid plate heat exchanger core, and the cooling water reciprocally bends and flows between the first water collecting chamber and the second water collecting chamber through the pipe joints along multiple gas-liquid plate heat exchanger cores, which can fully achieve the heat exchange effect, the heat exchange efficiency of the heat exchanger is high, the heat exchange effect is good, the structure is simple, and the disassembly and assembly are convenient. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is a top view of the heat exchanger of the present utility model;

[0013] Figure 3 is a side cross-sectional view of the heat exchanger of the present utility model;

[0014] Figure 4 This is a schematic structural diagram of the gas-liquid plate heat exchanger core of the present utility model;

[0015] Figure 5 This is an axonometric view of the front side of the heat exchange plate of the present utility model;

[0016] Figure 6 This is an axonometric view of the back side of the heat exchange plate of the present utility model;

[0017] Figure 7 This is a partial cross-sectional view of the heat exchange plate of the present utility model;

[0018] Figure 8 This is a schematic diagram of the flow path of the cooling water of the present utility model flowing along the gas-liquid plate heat exchanger core between the first water collecting chamber and the second water collecting chamber.

[0019] In the figure: 1, end plate; 11, pipe joint; 2, heat exchange box; 3, heat exchange chamber; 4, first water collecting box; 41, water inlet pipe; 42, first partition; 5, second water collecting box; 51, water outlet pipe; 52, second partition; 6, gas-liquid plate heat exchanger core; 61, heat exchange plate; 611, communicating pipe orifice; 612, liquid heat exchange channel; 613, communication hole; 614, abutting protrusion; 615, heat exchange edge; 7, air inlet pipe; 8, exhaust pipe. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model. Embodiment

[0021] Please refer to Figure 1-8 , the present utility model provides a technical solution: a special vehicle low-temperature starting auxiliary machine heat exchanger, including a plurality of gas-liquid plate heat exchanger cores 6 arranged in parallel in a heat exchange box 2, the gas-liquid plate heat exchanger cores 6 are arranged along the length direction of the heat exchange box 2, the internal cavity of the heat exchange box 2 is a heat exchange chamber 3, and an air inlet pipe 7 and an exhaust pipe 8 are respectively arranged on the two side plates in the length direction of the heat exchange box 2;

[0022] At the upper and lower ends of the end plate 1, a first water collecting box 4 and a second water collecting box 5 are respectively provided. An inlet pipe 41 and an outlet pipe 51 are respectively provided on the first water collecting box 4 and the second water collecting box 5. A first water collecting chamber and a second water collecting chamber are respectively formed between the first water collecting box 4 and the second water collecting box 5 and the end plate 1. A first partition 42 is provided between two adjacent gas-liquid plate heat exchanger cores 6 in the first water collecting box 4, and a second partition 52 is provided between two adjacent gas-liquid plate heat exchanger cores 6 in the second water collecting box 5, and the first partition 42 and the second partition 52 are arranged alternately at intervals.

[0023] The heat exchange plates 61 of the gas-liquid plate heat exchanger core 6 are arranged along the height direction of the heat exchange box 2. The heat exchange plate 61 is a hollow plate-like structure. The internal cavity of the heat exchange plate 61 is a liquid heat exchange channel 612. Communication holes 613 are opened at the upper and lower ends of the front side of the heat exchange plate 61 along its thickness direction, and except for the last heat exchange plate 61, the communication holes 613 of other heat exchange plates 61 penetrate through the heat exchange plate 61. Communication pipe orifices 611 are arranged on the front end face of the heat exchange plate 61 around the communication holes 613. Adjacent heat exchange plates 61 in the gas-liquid plate heat exchanger core 6 are closely attached to each other and fixed. The communication pipe orifices 611 on the heat exchange plates 61 correspond to each other. The communication pipe orifices 611 of the heat exchange plate 61 at the forefront of the gas-liquid plate heat exchanger core 6 are fixedly nested with pipe joints 11. The pipe joints 11 are all fixed on the end plate 1, and the pipe joints 11 all penetrate through the end plate 1. The water inlets and outlets at both ends of the gas-liquid plate heat exchanger core 6 are respectively communicated with the first water collecting chamber and the second water collecting chamber through the pipe joints 11, and the heat exchange plates 61 of the gas-liquid plate heat exchanger core 6 are spaced apart from each other to form a gas heat exchange channel.

[0024] Working principle:

[0025] The high-temperature exhaust gas discharged from the auxiliary engine enters the heat exchange cavity 3 through the inlet pipe 7. The engine cooling water enters the first water collecting box 4 through the inlet pipe 41. Since the first partition 42 in the first water collecting box 4 and the second partition 52 in the second water collecting box 5 are arranged alternately at intervals, the cooling water reciprocally bends and flows between the first water collecting box 4 and the second water collecting box 5 along a plurality of gas-liquid plate heat exchanger cores 6 through the pipe joints 11. When the high-temperature exhaust gas in the heat exchange cavity 3 passes through the gas heat exchange channel of the gas-liquid plate heat exchanger core 6, it exchanges heat with the cooling water. The cooled cooling water finally enters the cooler of the main engine from the outlet pipe 51 on the second water collecting box 5, improving the temperature of the working environment of the main engine, so as to achieve the purpose of the main engine starting at low temperature. The exhaust gas in the heat exchange cavity 3 is discharged from the exhaust pipe 8.

[0026] The specific flow path of the cooling water inside the gas-liquid plate heat exchanger core 6 is as follows: The cooling water flows along the connecting pipe joint 11 at the water inlet end of the gas-liquid plate heat exchanger core 6 through the connecting pipe orifice 611. The cooling water flows through the connecting pipe orifice 611 and the connecting hole 613 into the liquid heat exchange channels 612 of each heat exchange plate 61. The cooling water in each liquid heat exchange channel 612 converges through the connecting hole 613 and the connecting pipe orifice 611 at the other end towards the connecting pipe joint 11 at the water outlet end of the gas-liquid plate heat exchanger core 6. Finally, the cooling water flows out through the connecting pipe joint 11 at the water outlet end of the gas-liquid plate heat exchanger core 6.

[0027] Further, a butting protrusion 614 is provided in the middle area on the front side of the heat exchange plate 61, and the butting protrusion 614 is in contact with the heat exchange plate 61 on its front side; through the butting protrusion 614, the high-temperature tail gas in the gas heat exchange channel can be more evenly distributed, improving the heat exchange efficiency, and the structural strength of the gas-liquid plate heat exchanger core 6 can be increased.

[0028] Further, heat exchange edges 615 extending outwards are provided on the front side circular peripheral edge of the heat exchange plate 61. Through the heat exchange edges 615, the heat exchange performance of the heat exchange plate 61 can be increased, and the heat exchange efficiency can be improved.

[0029] Further, the heat exchange box 2 and the end plate 1 are of a split structure. The open end on the front side of the heat exchange box 2 is detachably and fixedly connected to the end plate 1 by bolts, facilitating the disassembly, installation, and maintenance of the heat exchanger.

[0030] The special vehicle low-temperature start auxiliary machine heat exchanger disclosed in this embodiment exchanges heat between the cooling water of the engine and the high-temperature tail gas of the engine through multiple gas-liquid plate heat exchanger cores 6, increasing the temperature of the working environment of the main engine, thereby achieving the purpose of the main engine starting at low temperature, making full use of waste heat, and saving energy and protecting the environment; the cooling water in the gas-liquid plate heat exchanger core 6 is shunted and flows in each liquid heat exchange channel 612. The cooling water in each liquid heat exchange channel 612 of the gas-liquid plate heat exchanger core 6 finally converges towards the connecting pipe joint 11 at the water outlet end of the gas-liquid plate heat exchanger core 6, and the cooling water reciprocally bends and flows between the water collecting box one 4 and the water collecting box two 5 along multiple gas-liquid plate heat exchanger cores 6 through the connecting pipe joint 11, being able to fully achieve the effect of heat exchange. The heat exchanger has high heat exchange efficiency, good heat exchange effect, simple structure, and is convenient for disassembly and installation.

[0031] Although the embodiments of the present invention 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 invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature starting auxiliary heat exchanger for special vehicles, comprising a plurality of gas-liquid plate heat exchanger cores arranged in parallel with each other inside a heat exchange box, and the gas-liquid plate heat exchanger cores are arranged along the length direction of the heat exchange box, and it is characterized in that: The inner cavity of the heat exchange box is a heat exchange cavity. An air inlet pipe and an exhaust pipe are respectively arranged on the two side plates in the length direction of the heat exchange box. The gas-liquid plate heat exchanger core is fixed on the end plate at the front side of the heat exchange box. A water collecting box one and a water collecting box two are respectively arranged at the upper and lower ends of the end plate. A water inlet pipe and a water outlet pipe are respectively arranged on the water collecting box one and the water collecting box two. A water collecting chamber one and a water collecting chamber two are respectively formed between the water collecting box one and the water collecting box two and the end plate. The water inlet and outlet ports at both ends of the gas-liquid plate heat exchanger core are respectively communicated with the water collecting chamber one and the water collecting chamber two through pipe joints. And the heat exchange plates in the gas-liquid plate heat exchanger core are spaced from each other to form a gas heat exchange channel.

2. The special vehicle low-temperature starting auxiliary engine heat exchanger according to claim 1, wherein: The heat exchange plates of the gas-liquid plate heat exchanger core are arranged along the height direction of the heat exchange box. The heat exchange plates are hollow plate-like structures. The inner cavity of the heat exchange plate is a liquid heat exchange channel. Communication holes are respectively opened at the upper and lower ends of the front side of the heat exchange plate along its thickness direction. And for the heat exchange plates except the last one, the communication holes penetrate through the heat exchange plates. Communication pipe orifices are respectively arranged on the front end face of the heat exchange plate around the communication holes. The adjacent heat exchange plates in the gas-liquid plate heat exchanger core are closely attached and fixed to each other. The communication pipe orifices on the heat exchange plates correspond to each other. The pipe joints are all fixed on the end plate and penetrate through the end plate. The communication pipe orifice of the foremost heat exchange plate on the gas-liquid plate heat exchanger core is fixedly nested in the corresponding pipe joint.

3. A low-temperature starting auxiliary heat exchanger for special vehicles according to claim 1, characterized in that: A partition one is arranged between two adjacent gas-liquid plate heat exchanger cores in the water collecting box one. A partition two is arranged between two adjacent gas-liquid plate heat exchanger cores in the water collecting box two. And the partition one and the partition two are arranged alternately at intervals.

4. A special vehicle low-temperature starting auxiliary engine heat exchanger according to claim 1, characterized in that: A butting protrusion is arranged in the middle area of the front side of the heat exchange plate and is in contact with the heat exchange plate in front of it.

5. A special vehicle low-temperature starting auxiliary machine heat exchanger according to claim 1, characterized in that: Heat exchange edges extending outwards are respectively arranged on the circumferential edge of the front side of the heat exchange plate.

6. The special vehicle low-temperature starting auxiliary machine heat exchanger according to claim 1, wherein: The heat exchange box and the end plate are of a split structure. The open end at the front side of the heat exchange box is detachably and fixedly connected to the end plate through bolts.

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