A high-pressure resistant gas chamber structure for a heat exchanger and a high-pressure resistant heat exchanger.

Abstract

This invention relates to a high-pressure resistant gas chamber structure for heat exchangers and a high-pressure resistant heat exchanger. The high-pressure resistant gas chamber structure is an integrally brazed structure, including a rectangular tube, a reinforcing plate, a flow channel plate, and a rear cover plate. The front side of the rectangular tube has heat exchanger flat tube insertion holes and a total external flow hole. The reinforcing plate, flow channel plate, and rear cover plate are all plate structures with a double-sided brazing layer. They are arranged with equal length and height to the inner hole of the rectangular tube, and the sum of their thicknesses is consistent with the width of the inner hole of the rectangular tube. The reinforcing plate has flow distribution holes corresponding one-to-one with the heat exchanger flat tube insertion holes on the rectangular tube, and a total internal flow hole corresponding to the total external flow hole on the rectangular tube. The flow channel plate has multiple parallel transverse flow channel slots, and at least one vertical dividing strip is provided inside. The rear cover plate is a flat plate structure. The reinforcing plate, flow channel plate, and rear cover plate are sequentially inserted into the inner hole of the rectangular tube from front to back and tightly fixed by press fitting. This invention improves pressure resistance and heat exchange efficiency.

Description

Technical Field

[0001] This invention belongs to the field of heat exchanger technology, and specifically relates to a high-pressure resistant gas chamber structure for heat exchangers and a high-pressure resistant heat exchanger. Background Technology

[0002] A heat exchanger, also known as a heat transfer device, is a device that transfers heat from one heat transfer medium to another. In industrial production processes, heating or cooling, i.e., heat transfer, is often required. When one fluid exchanges heat with another and mixing is not permitted, an indirect heat exchanger is necessary. The primary function of a heat exchanger is the exchange of heat energy between hot and cold fluids.

[0003] With the rapid development of electric vehicles, high-pressure heat exchangers have gradually become an important direction in heat exchanger development. When products need to withstand high pressure, the existing heat exchanger chamber structure and the welding strength with other parts are insufficient, making them prone to expansion and cracking, leading to product leakage. The traditional heat exchanger chamber main plate structure is increasingly unable to meet the development needs of heat exchangers, and there is an urgent need for a high-pressure resistant chamber structure for heat exchangers that can withstand high pressure and has a simple structure. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-pressure resistant gas chamber structure and a high-pressure resistant heat exchanger that are simple in structure and can improve heat exchange efficiency.

[0005] One of the above-mentioned objectives of the present invention is achieved by the following technical solution:

[0006] A high-pressure resistant gas chamber structure for a heat exchanger, characterized in that: the high-pressure resistant gas chamber structure is an integrally brazed structure, including a rectangular tube, a reinforcing plate, a flow channel plate, and a rear cover plate; on the front side of the rectangular tube, along the tube length direction, one side is a heat exchanger flat tube insertion hole area, and the other side is a flow hole area; multiple heat exchanger flat tube insertion holes are evenly distributed along the tube length direction in the heat exchanger flat tube insertion hole area, and a total external flow hole is provided in the flow hole area; the reinforcing plate, flow channel plate, and rear cover plate are all plate structures with a double-sided brazing filler coating; the reinforcing plate, flow channel plate, and rear cover plate... The reinforcing plate, flow channel plate, and rear cover plate are arranged with the same length and height as the inner hole of the rectangular tube, and the sum of their thicknesses is consistent with the width of the inner hole of the rectangular tube. The reinforcing plate is provided with flow distribution holes corresponding one-to-one with the heat exchanger flat tube insertion holes on the rectangular tube, and with a total internal flow hole corresponding to the total external flow hole on the rectangular tube. The flow channel plate is provided with multiple parallel transverse flow channel slots, and at least one vertical dividing strip is provided in each transverse flow channel slot. The rear cover plate is a flat plate structure. The reinforcing plate, flow channel plate, and rear cover plate are inserted into the inner hole of the rectangular tube from front to back and are tightly fixed by press fitting.

[0007] The diameters of the total external and internal flow holes should cover the width of the multiple transverse flow channel slots.

[0008] Furthermore: the rectangular tube is made of aluminum tube with a brazing layer coated on one side; the reinforcing plate, flow channel plate and rear cover plate are all made of aluminum plates with a brazing layer coated on both sides.

[0009] The second objective of this invention is achieved through the following technical solution:

[0010] A high-pressure heat exchanger is characterized by: an integrally brazed structure comprising high-pressure gas chambers on both sides, heat exchange flat tubes connecting the two high-pressure gas chambers, and fins disposed between the heat exchange flat tubes; the two high-pressure gas chambers on both sides adopt the same structural form and are arranged in opposite directions at 180°; the main external flow hole on one side of the high-pressure gas chamber is located on one side of the heat exchange flat tube and is used as an air inlet, while the main external flow hole on the other side of the high-pressure gas chamber is located on the other side of the heat exchange flat tube and is used as an air outlet;

[0011] Furthermore: the heat exchange flat tube is a microchannel flat tube, and the number and position of the transverse flow channel slots in the high-pressure resistant gas chambers on both sides should correspond one-to-one with the number and position of the microchannel holes on the heat exchange flat tube.

[0012] Furthermore: an air inlet connector is integrally brazed on the inner side of one high-pressure resistant chamber corresponding to the air inlet, and an air outlet connector is integrally brazed on the inner side of the other high-pressure resistant chamber corresponding to the air outlet; both the air inlet connector and the air outlet connector are provided with right-angled pipe connection holes, the pipe connection holes on the air inlet connector form an internal connection with the air inlet on one side of the high-pressure resistant chamber, and the pipe connection holes on the air outlet connector form an internal connection with the air outlet on the other side of the high-pressure resistant chamber.

[0013] Furthermore, screw mounting holes are pre-machined on both the air intake and exhaust interfaces.

[0014] The advantages and positive effects of this invention are as follows:

[0015] 1. The high-pressure resistant gas chamber of this invention adopts a plug-in solid integrated brazed structure formed by a rectangular tube, a reinforcing plate, a flow channel plate and a rear cover plate. Compared with the existing gas chamber structure, it significantly improves the pressure resistance and can withstand pressures of 3 to 50 MPa, meeting the ever-increasing pressure requirements of customers for heat exchangers. The applicable scope includes evaporators, condensers, outdoor heat exchangers, indoor heat exchangers, etc., but is not limited to the above-mentioned heat exchangers.

[0016] 2. This invention uses a rectangular tube structure to replace the traditional main plate and air chamber structure, which reduces production costs.

[0017] 3. The flow distribution holes on the reinforcing plate and the transverse flow channel slots on the flow channel plate of the present invention intersect to form a grid flow channel. The grid flow channel can form different flow channels according to the size and shape of the slots on the flow channel plate, thereby improving the heat exchange efficiency.

[0018] 4. This heat exchanger adopts the high-pressure resistant gas chamber structure described above, achieving good high-pressure resistance and high heat exchange efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall appearance of the high-pressure resistant air chamber of the present invention;

[0020] Figure 2 This is an exploded perspective view of the high-pressure resistant gas chamber of the present invention;

[0021] Figure 3 This is a schematic diagram of the overall appearance of the high-pressure heat exchanger of the present invention;

[0022] Figure 4 This is a schematic diagram of the heat exchange medium flow in the high-pressure heat exchanger of the present invention. Detailed Implementation

[0023] The structure of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0024] For an example of a high-pressure resistant gas chamber structure for a heat exchanger, please refer to [link / reference]. Figure 1-2 The invention features a high-pressure resistant gas chamber 1, which is an integrally brazed structure comprising a rectangular tube 1.1, a reinforcing plate 1.2, a flow channel plate 1.3, and a rear cover plate 1.4. On the front side of the rectangular tube, along the tube length, one side is a heat exchanger flat tube insertion hole area, and the other side is a flow hole area. The area of ​​the heat exchanger flat tube insertion hole area is much larger than the area of ​​the flow hole area. Multiple vertical heat exchanger flat tube insertion holes 1.1.1 are evenly distributed along the tube length in the heat exchanger flat tube insertion hole area. The flow hole area is provided with a general external flow hole 1.1.2, which is preferably, but not limited to, the circular hole shown in the attached figure. The reinforcing plate, flow channel plate, and rear cover plate are of equal length and height to the inner hole of the rectangular tube. The reinforcing plate, flow channel plate, and rear cover plate all adopt a plate structure with a double-sided brazing layer. The reinforcing plate is provided with flow distribution holes 1.2.1 corresponding one-to-one with the heat exchanger flat tube insertion holes on the rectangular tube, and a total internal flow channel hole 1.2.2 corresponding to the total external flow channel hole on the rectangular tube. The flow channel plate is provided with multiple parallel transverse flow channel slots 1.3.1, and at least one vertical dividing strip 1.3.2 is provided in the transverse flow channel slots. The rear cover plate is a flat plate structure. The reinforcing plate, flow channel plate, and rear cover plate are inserted into the inner hole of the rectangular tube from front to back, and are tightly fixed by press fitting to achieve gapless contact between the contact parts, and are integrally formed by brazing.

[0025] This high-pressure resistant chamber structure is an important component of the heat exchanger. In use, two high-pressure resistant chambers are paired together. The main external flow passage on one high-pressure resistant chamber serves as the air inlet, and the main external flow passage on the other high-pressure resistant chamber serves as the air outlet. The diameters of the main external and internal flow passages should cover the width of the multiple transverse flow channel slots to ensure that the heat exchange medium is evenly distributed within all the transverse flow channel slots.

[0026] The thickness and number of layers of the aforementioned reinforcing plates, flow channel plates, and rear cover plates can be adjusted according to the performance and strength requirements of the heat exchanger.

[0027] The high-pressure heat exchanger based on the above-mentioned high-pressure resistant gas chamber structure adopts an integrated brazed structure, see [reference]. Figure 3-4 The system mainly consists of two high-pressure resistant gas chambers 1 located on both sides, heat exchange flat tubes 2 connecting the two high-pressure resistant gas chambers, and fins 3 disposed between the heat exchange flat tubes. The two high-pressure resistant gas chambers on both sides adopt the same structural form but are arranged in opposite directions at 180°. That is, the main external flow hole on one side of the high-pressure resistant gas chamber is located on one side of the heat exchange flat tube, while the main external flow hole on the other side of the high-pressure resistant gas chamber is located on the other side of the heat exchange flat tube. The main external flow hole on one side of the high-pressure resistant gas chamber serves as the air inlet, and the main external flow hole on the other side of the high-pressure resistant gas chamber serves as the air outlet. Furthermore, when the heat exchange flat tubes are microchannel flat tubes, the number and position of the transverse flow channel slots in the two high-pressure resistant gas chambers should correspond one-to-one with the number and position of the microchannel holes on the heat exchange flat tube. This ensures that the heat exchange medium flows uniformly into each microchannel hole, achieving better heat exchange efficiency.

[0028] To facilitate the connection of the air inlet and outlet to external piping and to enable the fixed installation of the entire high-pressure heat exchanger inside the vehicle, an air inlet connector 4 is integrally brazed onto the inner side of one high-pressure chamber corresponding to the air inlet, and an air outlet connector 5 is integrally brazed onto the inner side of the other high-pressure chamber corresponding to the air outlet. Both the air inlet and outlet connectors adopt the same block structure, and both are provided with right-angled pipe connection holes. The pipe connection holes on the air inlet connector form an internal connection with the air inlet on one side of the high-pressure chamber, and the pipe connection holes on the air outlet connector form an internal connection with the air outlet on the other side of the high-pressure chamber. The input and output of the heat exchange medium are achieved through external air inlet and outlet pipes. In addition, screw mounting holes are pre-machined on the air inlet and outlet connectors for inserting screws to fix the high-pressure heat exchanger onto the designated mounting bracket inside the vehicle.

[0029] The manufacturing method of this high-pressure heat exchanger is as follows:

[0030] After the two high-pressure resistant gas chambers are assembled and pressed together, they are combined with the main body of the heat exchanger, including heat dissipation tubes, heat dissipation fins, inlet interface components, and outlet interface components, and then welded together in the furnace to finally form a high-pressure resistant heat exchanger.

[0031] With attachment Figure 4 The working principle of this high-pressure heat exchanger is illustrated using the S-shaped flow channel as an example:

[0032] The heat exchange medium flows through the pipe connection hole on the inlet fitting, the inlet on one side of the high-pressure resistant gas chamber, and the inner and outer flow holes on the same side of the high-pressure resistant gas chamber. It then flows into the corresponding transverse flow channel slotted area within the high-pressure resistant gas chamber on that side. Flowing along the transverse flow channel slots, it is obstructed by the vertical dividing zone during its flow. The heat exchange medium then flows through the corresponding heat exchange flat tube in area A to the other side of the high-pressure resistant gas chamber. Upon reaching the other side of the high-pressure resistant gas chamber, it similarly flows along the transverse flow channel slots within the same chamber. During its flow, it is obstructed by the vertical dividing zone within the other side of the high-pressure resistant gas chamber. Due to the obstruction of the dividing zone, the heat exchange medium flows back to the high-pressure resistant gas chamber on one side through the heat exchange flat tube corresponding to zone B. After entering the high-pressure resistant gas chamber on one side, it flows again along the transverse flow channel corresponding to that side. Restricted by the end of the transverse flow channel, the heat exchange medium flows again to the high-pressure resistant gas chamber on the other side through the heat exchange flat tube corresponding to zone C. Finally, it flows into the total internal flow hole of the high-pressure resistant gas chamber on the other side through the transverse flow channel. It then flows out of the heat exchanger through the total internal flow hole, the outlet, and the pipe connection hole on the outlet interface.

[0033] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A high-pressure resistant gas chamber structure for a heat exchanger, characterized in that: The high-pressure resistant gas chamber structure is an integrally brazed structure, including a rectangular tube, a reinforcing plate, a flow channel plate, and a rear cover plate. On the front side of the rectangular tube, along the tube length, one side is a heat exchanger flat tube insertion hole area, and the other side is a flow hole area. Multiple vertically oriented heat exchanger flat tube insertion holes are evenly distributed along the tube length in the heat exchanger flat tube insertion hole area, and a main external flow hole is provided in the flow hole area. The reinforcing plate, flow channel plate, and rear cover plate are all plate structures with a double-sided brazing filler coating. The reinforcing plate, flow channel plate, and rear cover plate are of equal length to the inner hole of the rectangular tube. The height is set so that the sum of the thicknesses of the reinforcing plate, flow channel plate, and rear cover plate is consistent with the width of the inner hole of the rectangular tube; the reinforcing plate is provided with flow distribution holes corresponding one-to-one with the heat exchanger flat tube insertion holes on the rectangular tube, and is also provided with a total inner flow hole corresponding to the total outer flow hole on the rectangular tube; the flow channel plate is provided with multiple parallel transverse flow channel slots, and at least one vertical dividing strip is provided in the transverse flow channel slots; the rear cover plate is a flat plate structure; the reinforcing plate, flow channel plate, and rear cover plate are inserted into the inner hole of the rectangular tube from front to back and are tightly fixed by press fitting. The diameters of the total external and internal flow holes should cover the width of the multiple transverse flow channel slots.

2. The high-pressure resistant gas chamber structure for heat exchangers according to claim 1, characterized in that: The rectangular tube is made of aluminum tube with a brazing layer on one side; the reinforcing plate, flow channel plate and rear cover plate are all made of aluminum plates with a brazing layer on both sides.

3. A high-pressure resistant heat exchanger, characterized in that: The device employs an integral brazed structure, comprising high-pressure resistant gas chambers on both sides, heat exchange flat tubes connecting the two high-pressure resistant gas chambers, and fins disposed between the heat exchange flat tubes. The high-pressure resistant gas chambers on both sides adopt the high-pressure resistant gas chamber structure for heat exchangers as described in claim 1 or 2. The high-pressure resistant gas chambers on both sides adopt the same structural form and are arranged in opposite directions at 180°. The main external flow hole on one side of the high-pressure resistant gas chamber is located on one side of the heat exchange flat tube and serves as an air inlet, while the main external flow hole on the other side of the high-pressure resistant gas chamber is located on the other side of the heat exchange flat tube and serves as an air outlet.

4. The high-pressure heat exchanger according to claim 3, characterized in that: The heat exchange flat tube is a microchannel flat tube, and the number and position of the transverse flow channel slots in the high-pressure resistant gas chambers on both sides correspond one-to-one with the number and position of the microchannel holes on the heat exchange flat tube.

5. The high-pressure heat exchanger according to claim 3, characterized in that: An air inlet connector is integrally brazed on the inner side of one high-pressure resistant air chamber corresponding to the air inlet, and an air outlet connector is integrally brazed on the inner side of the other high-pressure resistant air chamber corresponding to the air outlet. Both the air inlet connector and the air outlet connector are provided with right-angled pipe holes. The pipe holes on the air inlet connector form an internal connection with the air inlet on one side of the high-pressure resistant air chamber, and the pipe holes on the air outlet connector form an internal connection with the air outlet on the other side of the high-pressure resistant air chamber.

6. The high-pressure heat exchanger according to claim 5, characterized in that: Screw mounting holes are pre-machined on the air inlet and air outlet connectors.

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