Burner heat exchanger assembly

Abstract

The utility model belongs to the technical field of combustors, and particularly relates to a combustor heat exchanger assembly which comprises a shell and a combustor assembly, a heat absorption structure composed of more than two circles of spiral heat absorption pipes is arranged in the shell, the combustion end of the combustor assembly is located in the spiral inner diameter of a heat absorption pipe body, and a partition plate is arranged in the spiral inner diameter of the heat absorption pipe body. A plurality of partition frames are distributed on the heat absorption structure in the circumferential direction, a plurality of partition insertion plates are arranged on the partition frames in the axial direction of the heat absorption structure, and the partition insertion plates are inserted between two adjacent circles of pipe bodies of heat absorption pipes of the heat absorption structure. The heat absorption tube is simple in structure and reasonable in design, on the basis of an existing structure, the distance between the smoke passing gaps between the two adjacent circles of tube bodies of the heat absorption tube is effectively limited through the separation frames and the separation insertion plates, it is guaranteed that smoke can smoothly flow to pass through the smoke passing gaps, and the heat exchange efficiency is high.

Description

Technical fields:

[0001] This utility model belongs to the field of burner technology, and specifically refers to a burner heat exchanger assembly. Background technology:

[0002] A Chinese utility model patent (authorization announcement number: CN205351323U) discloses a burner heat exchanger assembly, which includes an air inlet channel connected to an end cap at one end of the housing, a heat absorption structure formed by a spiral arrangement of a heat absorption tube inside the housing, a burner inside the heat absorption structure, the burner communicating with the air inlet channel, a baffle plate at the end of the heat absorption structure away from the air inlet channel, a flue gas channel formed between the tube bodies of the heat absorption tube in the heat absorption structure and between the end of the heat absorption structure near the end cap and the end cap, a flue gas accumulation area in the inner cavity of the housing, and an air outlet channel on the housing, the air outlet channel connecting the flue gas accumulation area and the flue gas channel. Gas enters from the air inlet channel, the flue gas generated by the burner combustion absorbs heat through the heat absorption structure, enters the flue gas accumulation area through the flue gas channel, and is discharged outward through the air outlet channel.

[0003] In this structure, the flue gas generated by the burner combustion needs to flow through the tubes of the heat absorber first, then through the baffle, and finally through the tubes of the heat absorber again, entering the flue gas accumulation area before being discharged outwards at the outlet channel. However, because the heat absorber tubes are spirally stacked, in actual use it has been found that the tubes of the heat absorber are easily squeezed and stuck together, preventing the flue gas from flowing easily. This results in the high-temperature flue gas stagnating and failing to circulate smoothly, leading to low heat exchange efficiency. Summary of the Invention:

[0004] The purpose of this invention is to provide a burner heat exchanger assembly that, based on the existing structure, effectively limits the distance between the flue gas passage gaps between adjacent coils of the heat absorption tube by means of a partition frame and a partition plate, ensuring that the flue gas can flow smoothly through the flue gas passage gaps and has a high heat exchange efficiency.

[0005] This utility model is implemented as follows:

[0006] A burner heat exchanger assembly includes a housing and a burner assembly disposed on one side of the housing. The housing contains a heat-absorbing structure composed of two or more spiral heat-absorbing tubes. A flue gas passage is provided between adjacent coils of the heat-absorbing tubes. The combustion end of the burner assembly is located within the spiral inner diameter of the heat-absorbing tubes, and a baffle is disposed within the spiral inner diameter of the heat-absorbing tubes. A flue gas exhaust channel is located on the side of the housing opposite to the burner assembly, where the baffle is located. The heat-absorbing structure has several partitions distributed circumferentially, and several partition plates are disposed along the axial direction of the heat-absorbing structure. The partition plates are inserted between adjacent coils of the heat-absorbing tubes in the heat-absorbing structure.

[0007] In the aforementioned burner heat exchanger assembly, the partition frame and the partition plate are an integral structure, and the partition plate is formed by cutting the partition frame and bending sheet metal.

[0008] In the aforementioned burner heat exchanger assembly, the baffle is a disc structure, and the outer edge of the baffle is inserted between two adjacent coils of the heat-absorbing tube in the heat-absorbing structure.

[0009] In the above-mentioned burner heat exchanger assembly, the heat absorption tube located inside the housing has a flat tube structure, and the long axis of the heat absorption tube is distributed radially along the spiral of the heat absorption tube. The two ends of the heat absorption tube extend outside the housing to form a water inlet and a water outlet. The water inlet is located on the side of the partition away from the burner assembly, and the water outlet is located on the side of the partition closer to the burner assembly.

[0010] In the above-mentioned burner heat exchanger assembly, a heat insulation plate is fixed on the side of the baffle near the burner assembly. The heat insulation plate corresponds to the spiral inner diameter structure of the heat absorption tube. A limiting groove is opened on the side of the heat insulation plate near the burner assembly, and the combustion end of the burner assembly is inserted into the limiting groove.

[0011] In the aforementioned burner heat exchanger assembly, the housing includes a horizontally placed cylindrical body with an opening on one side, a cover covering the opening of the cylindrical body, a heat absorption structure fixedly clamped between the cylindrical body and the cover, the burner assembly being disposed on the other side of the cylindrical body, and the exhaust channel being disposed on the cover.

[0012] In the above-mentioned burner heat exchanger assembly, the cover and the exhaust channel are both inverted L-shaped structures. The long axis end of the cover is placed on the opening of the cylinder, and the short axis end is located directly above the cylinder. The bottom surface of the short axis end of the exhaust channel has an inclined surface with a horizontal height that gradually increases away from its long axis end. The top surface of the short axis end of the exhaust channel is provided with an exhaust port.

[0013] In the aforementioned burner heat exchanger assembly, a water collection trough is provided on the inner bottom surface of the cylinder. The water collection trough has a funnel-shaped structure and a drain connector communicating with the outside at its bottom.

[0014] The outstanding advantages of this utility model compared to the prior art are:

[0015] This utility model has a simple structure and reasonable design. Based on the existing structure, it effectively limits the distance between the flue gas passage gaps between two adjacent coils of the heat absorption tube by means of a partition frame and a partition plate, ensuring that the flue gas can flow smoothly through the flue gas passage gaps and has a high heat exchange efficiency. Attached image description:

[0016] Figure 1 This is a three-dimensional view of the entire utility model;

[0017] Figure 2 This is an overall sectional view of the present invention;

[0018] Figure 3 This is a structural diagram of the heat absorption tube and the partition frame of this utility model.

[0019] Figure 4 This is an exploded view of the heat absorption tube and the partition frame of this utility model.

[0020] In the diagram: 1. Shell; 2. Burner assembly; 3. Heat absorber tube; 4. Baffle plate; 5. Smoke exhaust channel; 6. Separator frame; 7. Separator insert plate; 8. Insulation plate; 9. Limiting groove; 10. Cylinder body; 11. Cover body; 12. Smoke exhaust port. Detailed implementation method:

[0021] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —4:

[0022] A burner heat exchanger assembly includes a housing 1 and a burner assembly 2 disposed on one side of the housing 1. The housing 1 is provided with a heat absorption structure consisting of heat absorption tubes 3 with two or more spiral turns. There is a flue gas passage gap between two adjacent turns of the heat absorption tubes 3. The combustion end of the burner assembly 2 is located in the spiral inner diameter of the heat absorption tubes 3, and a baffle 4 is provided in the spiral inner diameter of the heat absorption tubes 3. A flue gas exhaust channel 5 is provided on the housing 1 on the side of the baffle 4 away from the burner assembly 2. The heat absorption structure is circumferentially distributed with a plurality of partition frames 6. The partition frames 6 are provided with a plurality of partition inserts 7 along the axial direction of the heat absorption structure. The partition inserts 7 are inserted between two adjacent turns of the heat absorption tubes 3 in the heat absorption structure.

[0023] This utility model has a simple structure and reasonable design. Based on the existing structure, it effectively limits the distance between the flue gas passage gaps between two adjacent coils of the heat absorption tube 3 by means of the partition frame 6 and the partition plate 7, ensuring that the flue gas can flow smoothly through the flue gas passage gaps and has a high heat exchange efficiency.

[0024] In this embodiment, the partition plate 7 and the partition frame 6 can be separate structures. However, in order to effectively save on parts processing costs, the partition frame 6 and the partition plate 7 are integrated structures. The partition plate 7 is cut from the partition frame 6 and bent from sheet metal.

[0025] Furthermore, the partition 4 has a disc structure, and its outer edge is inserted between two adjacent coils of the heat-absorbing tube 3 in the heat-absorbing structure. In addition, to improve the heat insulation effect of the partition 4, a heat-insulating plate 8 is fixed on the side of the partition 4 near the burner assembly 2. The heat-insulating plate 8 corresponds to the spiral inner diameter structure of the heat-absorbing tube 3. Also, to improve the assembly stability of the burner assembly 2, a limiting groove 9 is formed on the side of the heat-insulating plate 8 near the burner assembly 2, and the combustion end of the burner assembly 2 is inserted into the limiting groove 9.

[0026] In order to further improve the heat exchange efficiency, the heat absorption tube 3 located in the shell 1 has a flat tube structure, and the long axis of the heat absorption tube 3 is distributed along the spiral radial direction of the heat absorption tube 3. The two ends of the heat absorption tube 3 extend out of the shell 1 to form a water inlet and a water outlet. The water inlet is located on the side of the partition 4 away from the burner assembly 2, and the water outlet is located on the side of the partition 4 close to the burner assembly 2.

[0027] Furthermore, the specific structure adopted by the shell 1 is as follows: the shell 1 includes a cylindrical body 10 placed horizontally and having an opening on one side, a cover 11 covering the opening of the cylindrical body 10, the heat absorption structure being fixedly clamped between the cylindrical body 10 and the cover 11, the burner assembly 2 being disposed on the other side of the cylindrical body 10, and the smoke exhaust channel 5 being disposed on the cover 11.

[0028] In this embodiment, a relatively compact structural layout is reasonably designed. Both the cover 11 and the smoke exhaust channel 5 are inverted L-shaped structures. The long axis end of the cover 11 covers the opening of the cylinder 10, and the short axis end is located directly above the cylinder 10. Considering the accumulation of condensate, the bottom surface of the short axis end of the smoke exhaust channel 5 has an inclined surface with a horizontal height that gradually increases away from its long axis end. That is, the inclined surface can guide the condensate to flow back into the shell 1. The top surface of the short axis end of the smoke exhaust channel 5 is provided with a smoke exhaust port 12.

[0029] In addition, in order to effectively collect and discharge condensate, a water collection trough is provided on the inner bottom surface of the cylinder 10. The water collection trough has a funnel-shaped structure and a drain connector connected to the outside at its bottom.

[0030] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A burner heat exchanger assembly, comprising a housing (1) and a burner assembly (2) disposed on one side of the housing (1), wherein the housing (1) is provided with a heat absorption structure consisting of heat absorption tubes (3) with two or more spiral turns, wherein there is a flue gas passage gap between adjacent turns of the heat absorption tubes (3), the combustion end of the burner assembly (2) is located in the spiral inner diameter of the heat absorption tubes (3), and a baffle (4) is provided in the spiral inner diameter of the heat absorption tubes (3), and a flue gas exhaust channel (5) is provided on the housing (1) on the side of the baffle (4) away from the burner assembly (2), characterized in that: The heat-absorbing structure has several partition frames (6) distributed circumferentially. The partition frames (6) have several partition plates (7) arranged along the axial direction of the heat-absorbing structure. The partition plates (7) are inserted between two adjacent rings of the heat-absorbing tube (3) of the heat-absorbing structure.

2. The burner heat exchanger assembly according to claim 1, characterized in that: The partition frame (6) and the partition plate (7) are an integral structure. The partition plate (7) is cut from the partition frame (6) and bent by sheet metal.

3. The burner heat exchanger assembly according to claim 1, characterized in that: The partition (4) is a disc structure, and the outer edge of the partition (4) is inserted between two adjacent rings of the heat absorption tube (3) of the heat absorption structure.

4. A burner heat exchanger assembly according to claim 1, characterized in that: The heat-absorbing tube (3) located inside the housing (1) has a flat tube structure, and the long axis of the heat-absorbing tube (3) is distributed radially along the spiral of the heat-absorbing tube (3). The two ends of the heat-absorbing tube (3) extend out of the housing (1) to form a water inlet and a water outlet. The water inlet is located on the side of the partition (4) away from the burner assembly (2), and the water outlet is located on the side of the partition (4) close to the burner assembly (2).

5. A burner heat exchanger assembly according to claim 1 or 3, characterized in that: A heat insulation plate (8) is fixed on the side of the partition (4) near the burner assembly (2). The heat insulation plate (8) corresponds to the spiral inner diameter structure of the heat absorption tube (3). A limiting groove (9) is opened on the side of the heat insulation plate (8) near the burner assembly (2). The combustion end of the burner assembly (2) is inserted into the limiting groove (9).

6. A burner heat exchanger assembly according to claim 1, characterized in that: The housing (1) includes a cylindrical body (10) placed horizontally and with an opening on one side. A cover (11) is provided at the opening of the cylindrical body (10). The heat absorption structure is fixedly clamped between the cylindrical body (10) and the cover (11). The burner assembly (2) is provided on the other side of the cylindrical body (10). The smoke exhaust channel (5) is provided on the cover (11).

7. A burner heat exchanger assembly according to claim 6, characterized in that: The cover (11) and the smoke exhaust channel (5) are both inverted L-shaped structures. The long axis end of the cover (11) is placed on the opening of the cylinder (10), and the short axis end is located directly above the cylinder (10). The bottom surface of the short axis end of the smoke exhaust channel (5) has an inclined surface with a horizontal height that gradually increases away from its long axis end. The top surface of the short axis end of the smoke exhaust channel (5) is provided with a smoke exhaust port (12).

8. A burner heat exchanger assembly according to claim 6, characterized in that: The inner bottom surface of the cylinder (10) is provided with a water collection trough, which has a funnel-shaped structure and a drainage connector at its bottom that communicates with the outside.

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