Condensation heat exchanger and manufacturing method

Abstract

The invention discloses a condensation heat exchanger and a manufacturing method. The condensation heat exchanger comprises a shell, a heat exchange pipeline arranged in the shell, a flue gas outlet, a flue gas inlet, a water inlet port, a water outlet port and a water collecting tank. The smoke inlet is located in the front shell, the smoke outlet is located in the upper shell, a plurality of through holes are formed in the right shell and used for communication of the heat exchange pipeline, the inner bottom face of the lower shell is sunken downwards to form a water collecting groove, a drainage channel communicated with the outside is arranged on the water collecting groove, and the heat exchange pipeline is an S-shaped pipeline which is perpendicular to the horizontal plane and arranged in parallel. A water inlet and a water outlet of the snakelike pipeline are respectively connected with the through hole of the right shell, the water inlet area of the snakelike pipeline forms a water collecting box I on the right shell, a water inlet port is formed in the water collecting box I, the water outlet area of the snakelike pipeline forms a water collecting box II on the right shell, and a water outlet port is formed in the water collecting box II. According to the S-shaped pipeline structure, pipeline connectors are reduced, the welding workload is reduced, and the welding seam water leakage probability is reduced.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment technology, specifically a condensing heat exchanger for equipment such as gas water heaters and boilers, and its manufacturing method. Background Technology

[0002] Existing condensing heat exchangers are mostly made by welding or bending multiple straight pipes with elbows. This results in numerous pipe interfaces, a large amount of welding work, and many weld seams that can easily lead to water leakage. In addition, the inlet and outlet are usually located on both sides of the shell, making installation inconvenient and the pipe layout complex. Summary of the Invention

[0003] The purpose of this invention is to provide a condensing heat exchanger with a simple structure, few welding points, good sealing performance, and convenient installation, as well as a manufacturing method thereof.

[0004] The technical solution of the present invention is as follows: A condensing heat exchanger includes a shell, heat exchange pipes disposed within the shell, a flue gas outlet, a flue gas inlet, a water inlet port, a water outlet port, and a water collection tank. The shell includes a front shell, a right shell, an upper shell, and a lower shell. The flue gas inlet is located on the front shell, and the flue gas outlet is located on the upper shell. The right shell has several through holes for connecting the heat exchange pipes. The lower shell has a water collection tank formed by a downward-facing indentation on its inner bottom surface, and the water collection tank is provided with a drainage channel communicating with the outside. The heat exchange pipeline is a serpentine pipeline arranged vertically or parallel to the horizontal plane. The inlet and outlet of the serpentine pipeline are respectively connected to the through hole of the right shell. The inlet area of ​​the serpentine pipeline forms a water collection box one on the right shell, and the water collection box one is provided with an inlet port. The outlet area of ​​the serpentine pipeline forms a water collection box two on the right shell, and the water collection box two is provided with an outlet port.

[0005] Preferably, the above-mentioned serpentine tube is composed of two or more U-shaped tubes connected in series, and adjacent U-shaped tubes are connected by welding with elbows or by direct processing of bends.

[0006] Preferably, the inlet and outlet are located on the left and right sides or the top and bottom sides of the shell, respectively.

[0007] Preferably, the above-mentioned water collection box one and water collection box two can be integrated into a convex hull, with the interior separated into an inlet area and an outlet area.

[0008] Preferably, the housing is provided with an assembly connector for installation.

[0009] A method for manufacturing the above-mentioned condensing heat exchanger includes welding U-shaped tubes together to form a serpentine pipeline, then installing it in parallel in the housing, and placing the inlet and outlet on the same side of the housing.

[0010] The beneficial effects of this invention are: 1. The serpentine pipe structure reduces pipe joints, decreases welding workload, and reduces the probability of weld leakage; 2. The inlet and outlet are located on the same side, which facilitates installation and pipeline connection; 3. It has a compact structure and high heat exchange efficiency, making it suitable for condensing waste heat recovery equipment such as gas water heaters. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the condensing heat exchanger of the present invention; Figure 2 This is a schematic diagram of the through hole on the right side of the casing; Figure 3 This is a schematic diagram of the heat exchange piping inside the shell; Figure 4 yes Figure 1 The front view; Figure 5 This is a three-dimensional schematic diagram of Example 2. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Implementation: 1:

[0013] like Figure 1-4 As shown, a condensing heat exchanger includes a shell 1, heat exchange pipes disposed within the shell, a flue gas outlet 5, a flue gas inlet 6, a water inlet port 7, a water outlet port 8, and a water collection tank 9. The shell 1 includes a front shell 1-1, a right shell 1-2, an upper shell 1-3, and a lower shell 1-4. The flue gas inlet 6 is located on the front shell 1-1, and the flue gas outlet 5 is located on the upper shell 1-3. The right shell 1-2 has several through holes 12 for connecting the heat exchange pipes. The lower shell 1-4 has a recessed bottom surface forming a water collection tank 9, and the water collection tank 9 is provided with a drainage channel communicating with the outside. The heat exchange pipeline is a serpentine pipeline 2 arranged vertically and horizontally. The inlet 3 and outlet 4 of the serpentine pipeline 2 are respectively connected to the through hole 12 of the right shell 1-2. The inlet 3 area of ​​the serpentine pipeline forms a water collection box 10 below the right shell 1-2. The water collection box 10 is provided with an inlet port 7. The outlet 4 area of ​​the serpentine pipeline forms a water collection box 21 above the right shell 1-2. The water collection box 21 is provided with an outlet port 8.

[0014] Preferably, such as Figure 3 As shown, the above-mentioned serpentine pipe 2 is composed of two or more U-shaped pipes connected in series, and adjacent U-shaped pipes are connected by welding with elbows or by direct processing of bends.

[0015] Preferably, the water inlet 3 and the water outlet 4 are located on the left and right sides or the top and bottom sides of the shell 1, respectively.

[0016] Preferably, the above-mentioned water collection box 10 and water collection box 21 can be integrated into a convex hull, with the interior separated into an inlet area and an outlet area.

[0017] Preferably, the housing 1 is provided with an assembly connector for installation. Example 2:

[0018] like Figure 5 As shown, a condensing heat exchanger has a heat exchange pipeline that is a serpentine pipeline 2 parallel to the horizontal plane and arranged in parallel. The inlet 3 and outlet 4 of the serpentine pipeline 2 are respectively connected to the through hole 12 of the right shell 1-2. The inlet 3 area of ​​the serpentine pipeline forms a water collection box 10 on the left side of the right shell 1-2, and the water collection box 10 is provided with an inlet port 7. The outlet 4 area of ​​the serpentine pipeline forms a water collection box 21 on the right side of the right shell 1-2, and the water collection box 21 is provided with an outlet port 8. The rest of the structure is the same as in Embodiment 1. Implementation: 3:

[0019] A method for manufacturing a condensing heat exchanger according to the above includes welding U-shaped tubes to form a serpentine pipe 2, then installing it parallel or perpendicularly in a housing 1, and placing the inlet 3 and outlet 4 on the same side of the housing 1.

[0020] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A condensing heat exchanger, comprising a shell (1), heat exchange pipes disposed within the shell, a flue gas outlet (5), a flue gas inlet (6), a water inlet port (7), a water outlet port (8), and a water collection tank (9); the shell (1) comprises a front shell (1-1), a right shell (1-2), an upper shell (1-3), and a lower shell (1-4), the flue gas inlet (6) being located on the front shell (1-1), the flue gas outlet (5) being located on the upper shell (1-3), the right shell (1-2) having several through holes (12) for connecting the heat exchange pipes, and the lower shell (1-4) having a water collection tank (9) recessed downwards on its inner bottom surface, the water collection tank (9) having a drainage channel communicating with the outside, characterized in that, The heat exchange pipeline is a serpentine pipeline (2) arranged vertically or parallel to the horizontal plane. The inlet (3) and outlet (4) of the serpentine pipeline (2) are respectively connected to the through hole (122) of the right shell (1-2). The inlet (3) area of ​​the serpentine pipeline forms a water collection box one (10) on the right shell (1-2). The water collection box one (10) is provided with an inlet port (7). The outlet (4) area of ​​the serpentine pipeline forms a water collection box two (11) on the right shell (1-2). The water collection box two (11) is provided with an outlet port (8).

2. A condensing heat exchanger according to claim 1, characterized in that, The serpentine pipeline (2) is composed of two or more U-shaped pipes connected in series, and adjacent U-shaped pipes are connected by welding with elbows or by direct processing of bends.

3. A condensing heat exchanger according to claim 1, characterized in that, The inlet (3) and outlet (4) are located on the left and right sides or the top and bottom sides of the shell (1), respectively.

4. A condensing heat exchanger according to claim 1, characterized in that, The first water collection box (10) and the second water collection box (11) can be integrated into a convex hull, with the interior separated into an inlet area and an outlet area.

5. A condensing heat exchanger according to claim 1, characterized in that, The housing (1) is provided with assembly connectors for installation.

6. A method for manufacturing a condensing heat exchanger according to any one of claims 1-5, characterized in that: This includes welding U-shaped pipes together to form a serpentine pipe (2), then installing it parallel or vertically in the housing (1), and placing the inlet (3) and outlet (4) on the same side of the housing (1).

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