Heat exchanger core structure

Abstract

The core structure of the heat exchanger comprises a tube plate and a core tube, a plurality of mounting holes are formed in the tube plate, the two ends of the core tube are inserted into the mounting holes, a baffle is arranged on the surface of the tube plate, and the baffle blocks the core tube and the mounting holes to enable gaps between the core tube and the peripheries of the mounting holes to form a bowl bottom structure. Compared with the prior art, according to the core structure of the heat exchanger, the baffles are arranged on the surfaces of the tube plates to block the core tubes and the mounting holes, in the tin immersion process, the baffles support tin liquid, prevent the tin liquid from dripping, avoid gaps, and improve the sealing performance of the core tubes and the tube plates.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a heat exchanger core structure. Background Technology

[0002] A heat exchanger is a device used for exchanging heat and cold. Inside the heat exchanger is a core, such as... Figure 3 and Figure 4 As shown, the core includes several core tubes 100 and a tube sheet 200. The tube sheet 200 has multiple mounting holes 300. The two ends of the core tubes 100 are connected to the mounting holes 300 respectively. The gap between the core tubes 100 and the mounting holes 300 is filled by immersion soldering. During the immersion soldering process, the tube sheet 200 and the core tubes 100 need to be removed from the molten solder bath 400 before the molten solder has completely solidified. At this time, the molten solder has not completely solidified and is prone to dripping, which causes some gaps to remain between the mounting holes and the core tubes. The sealing performance is not up to standard and needs to be repaired by manual soldering. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a heat exchanger core structure that addresses the shortcomings of the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A heat exchanger core structure includes a tube sheet and a core tube. The tube sheet has several mounting holes. Both ends of the core tube are inserted into the mounting holes. A baffle is provided on the surface of the tube sheet. The baffle blocks the core tube and the mounting holes, so that the gap between the core tube and the periphery of the mounting holes forms a bowl-shaped structure.

[0006] Furthermore, the periphery of the baffle is connected to the tube sheet by spot welding.

[0007] Furthermore, the baffle plate is machined with multiple clearance holes corresponding to the core tube position, and the diameter of the clearance holes is between the inner diameter and the outer diameter of the core tube.

[0008] Furthermore, the opening of the mounting hole is chamfered.

[0009] Compared with the prior art, the heat exchanger core structure of this utility model improves the sealing performance between the core tube and the tube sheet by setting a baffle on the surface of the tube sheet to block the core tube and the mounting hole. During the tinning process, the baffle supports the molten tin, prevents the molten tin from dripping, avoids gaps, and improves the sealing performance between the core tube and the tube sheet. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 yes Figure 1Enlarged view of point A in the middle;

[0012] Figure 3 This is a schematic diagram of the original heat exchanger core.

[0013] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0014] Among them, 1. Tube sheet, 2. Core tube, 3. Mounting hole, 4. Baffle, 5. Clearance hole, 6. Chamfer. Detailed Implementation

[0015] The technical solutions in the embodiments of this utility model will be clearly and completely described below.

[0016] like Figure 1 and Figure 2 As shown, a heat exchanger core structure includes a tube sheet 1 and a core tube 2. The tube sheet 1 is machined with a plurality of mounting holes 3. Both ends of the core tube 2 are inserted into the mounting holes 3. The gap between the core tube 2 and the mounting holes 3 is filled with tin. A baffle 4 is provided on the surface of the tube sheet 1. The baffle 4 blocks the core tube 2 and the mounting holes 3, so that the gap between the core tube 2 and the periphery of the mounting holes 3 forms a bowl-bottom structure. In this way, during the tinning process, the baffle 4 can hold the molten tin and allow it to solidify, preventing the molten tin from dripping and reducing the gaps caused by the molten tin dripping.

[0017] In this embodiment, the baffle 4 can be made of a thin plate of 0.5 to 1 mm. The baffle 4 is connected to the tube sheet 1 by spot welding around its perimeter. A plurality of clearance holes 5 are also machined on the baffle 4 corresponding to the position of the core tube 2. The clearance holes 5 allow the medium to pass through the core tube 2. The diameter of the clearance holes 5 is between the inner diameter and the outer diameter of the core tube 2. If the diameter of the clearance holes 5 is smaller than the inner diameter of the core tube 2, it will lead to a reduction in the flow rate of the medium and a decrease in heat exchange efficiency. If the diameter of the clearance holes 5 is larger than the outer diameter of the core tube 2, it may not be able to block the molten solder.

[0018] The mounting hole 3 has a chamfer 6 at its opening. By setting the chamfer 6, the molten solder can more easily enter the gap between the core tube 2 and the mounting hole 3 during the tinning process and fill the gap.

[0019] This utility model is not limited to the embodiments described. Those skilled in the art can still make some modifications or changes without departing from the spirit and scope of this utility model. Therefore, the scope of protection of this utility model shall be determined by the scope defined in the claims.

Claims

1. A heat exchanger core structure, comprising a tube sheet and core tubes, wherein the tube sheet is machined with a plurality of mounting holes, and both ends of the core tubes are inserted into the mounting holes, characterized in that: The surface of the tube sheet is provided with a baffle, which blocks the core tube and the mounting hole, so that the gap between the core tube and the periphery of the mounting hole forms a bowl-bottom structure.

2. The heat exchanger core structure according to claim 1, characterized in that: The baffle is connected to the tube sheet by spot welding around its perimeter.

3. The heat exchanger core structure according to claim 1, characterized in that: The baffle plate has multiple clearance holes machined at the position corresponding to the core tube, and the diameter of the clearance holes is between the inner diameter and the outer diameter of the core tube.

4. The heat exchanger core structure according to claim 1, characterized in that: The opening of the mounting hole is chamfered.

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