Heat exchanger

Abstract

The utility model relates to a heat exchange device, in particular to a heat exchanger, which comprises a shell, a heat exchange tube group is arranged above the shell in a penetrating manner, a combustion area is arranged below the shell, a water inlet interface and a water outlet interface are arranged on the heat exchange tube group, the heat exchange tube group comprises a plurality of heat exchange tubes, fins are arranged on the heat exchange tube group, and the fins comprise a plurality of holes penetrating through the heat exchange tube group. The fins are provided with holes, fixed turnups connected with the heat exchange tube set are arranged at the holes, notches are formed in the lower ends, located on the two sides of the heat exchange tubes, of the fins, flame guide turnups are arranged above the notches, the fixed turnups and the flame guide turnups of the adjacent fins are tightly attached to each other, and flames are guided to the heat exchange tubes through the flame guide turnups.

Description

Technical Field

[0001] The utility model relates to a heat exchange device, in particular to a heat exchanger used for a water heater. Background Art

[0002] Traditional water heaters generally include electric, solar, and combustion water heaters. Electric water heaters have high power and high energy consumption, and generally need to be preheated in advance. Solar water heaters are too dependent on the weather. Currently, the application rate of solar water heaters in commercial housing is not high. Gas water heaters are small in size and heat quickly, especially suitable for commercial housing with natural gas laying, and are the most convenient choice. As the core component of the water heater, the heat exchange performance and heat exchange efficiency of the heat exchanger are the key considerations. Utility Model Content

[0003] In order to improve the heat exchange efficiency and use the heat for water heating as much as possible, the utility model provides a heat exchanger with good heat exchange performance.

[0004] The technical solution adopted by the utility model is: a heat exchanger, including an outer shell, a heat exchange tube group is passed through the upper part of the outer shell, a combustion zone is provided below the outer shell, a water inlet interface and a water outlet interface are provided on the heat exchange tube group, the heat exchange tube group includes a plurality of heat exchange tubes, fins are provided on the heat exchange tube group, the fins include a plurality of openings passing through the heat exchange tube group, fixed flanges connected to the heat exchange tube group are provided at the openings, notches are provided at the lower ends of the fins on both sides of the heat exchange tube, flame guide flanges are provided above the notches, the fixed flanges and flame guide flanges of adjacent fins are respectively arranged closely to each other, and the flame guide flanges guide the flame to the heat exchange tube.

[0005] As one of the preferred solutions for the heat exchanger, a spiral flip plate is provided in the heat exchange tube, and the spiral flip plate makes the water flow flip up and down.

[0006] As one of the preferred solutions for the heat exchanger: the heat exchange tubes are arranged in double rows up and down.

[0007] As one of the preferred solutions for the heat exchanger: there are at least three heat exchange tubes in each row, and the water inlet or outlet interfaces of the heat exchange tubes are arranged in the middle.

[0008] As one of the preferred solutions for the heat exchanger: a welding notch is provided on the fin, the welding notch is arranged just above or just below the heat exchange tube, and the welding notch extends from the edge of the fin to the fixed flange.

[0009] As one of the preferred solutions for the heat exchanger: the shell includes end plates at both ends with through holes for passing heat exchange tubes, and side plates located on both sides.

[0010] As one of the preferred solutions for the heat exchanger: sealing plates are provided on both sides of the heat exchange tube group.

[0011] As one of the preferred solutions for the heat exchanger: an electric heating device installation position and a temperature control installation position are arranged outside the sealing plate.

[0012] As one of the preferred solutions for the heat exchanger: a side plate is provided with a heat insulation plate inside the combustion zone.

[0013] As one of the preferred solutions for the heat exchanger: the side plate is located in the combustion zone and is pressed inwardly with convex points, and the heat insulation plate is attached to the convex points.

[0014] The utility model has the following beneficial effects: the flame-guiding flange is used to make the flame always surround the heat exchange tube, thereby improving the conversion efficiency. The spiral flip surface is used for flow guidance, and the water flow will flip up and down when in use, so that the water in the heat exchange tube is evenly heated. The heat exchange tube is arranged in double layers, so that the heat exchange tube and the flame heat can fully exchange heat, thereby improving the heat exchange rate of the water heater. The fin adopts a fixed flange connection effect and a stronger heat transfer effect; the notch is set on the fin for easy welding, so that the solder paste can be spread between the heat exchange tube and the fin through capillary action. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model.

[0016] Figure 2 This is a three-dimensional diagram from another perspective of the present invention.

[0017] Figure 3 It is a cross-sectional view of the utility model.

[0018] Figure 4 Schematic diagram of the fin structure.

[0019] Among them: 1. Shell; 2. Heat exchange tube group; 3. Combustion zone; 21. Water inlet interface; 22. Water outlet interface; 23. Heat exchange tube; 4. Fin; 41. Opening; 42. Fixed flange; 43. Notch; 44. Flame guide flange; 5. Spiral flip plate; 45. Welding notch; 11. End plate; 12. Side plate; 13. Sealing plate; 14. Electric heating device installation position; 15. Temperature control installation position; 16. Heat insulation board; 17. Bump. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The fact that all the technical features in the dependent claims are listed in an embodiment does not mean that this part is a necessary technical feature. This embodiment is intended to describe the technical solutions in a simple and clear manner. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0021] like Figures 1 to 4 As shown: A heat exchanger includes a shell 1, a heat exchange tube group 2 is passed through the upper part of the shell 1, and a combustion zone 3 is provided below the shell 1. The heat exchange tube group 2 is provided with a water inlet interface 21 and a water outlet interface 22. The heat exchange tube group 2 includes a plurality of heat exchange tubes 23, and the heat exchange tubes 23 are connected by elbows, and the heat exchange tubes 23 are arranged in double rows up and down. The heat exchange tube group 2 is provided with fins 4, and the fins 4 include a plurality of openings 41 passing through the heat exchange tube group 2, and the openings 41 are provided with fixed flanges 42 connected to the heat exchange tube group 2. The fins 4 are provided with notches 43 at the lower ends of both sides of the heat exchange tube 23, and flame guide flanges 44 are provided above the notches 43. Adjacent flame guide flanges 44 are connected to form a V shape, and the fixed flanges 42 and flame guide flanges 44 of adjacent fins 4 are respectively arranged close to each other. The flame guide flanges 44 are used to make the flame always surround the heat exchange tube 23, thereby improving the conversion efficiency.

[0022] In this embodiment, a spiral flip sheet 5 is provided in the heat exchange tube 23, and the spiral flip sheet 5 flips the water flow up and down. The water flow in the heat exchange tube 23 is guided by the spiral flip surface 5, and the water flow flips up and down during use, so that the water in the heat exchange tube 23 is evenly heated.

[0023] In this embodiment, a welding notch 45 is provided on the fin 4 to ensure that the fin 4 is tightly connected to the heat exchange tube 23 . The welding notch 45 is arranged just above or just below the heat exchange tube 23 , and extends from the edge of the fin 4 to the fixed flange 42 .

[0024] In this embodiment, the housing 1 includes end plates 11 at both ends, each of which is provided with through holes for passing the heat exchange tubes 23 , and side plates 12 at both sides.

[0025] Sealing plates 13 are provided on both sides of the heat exchange tube group 2. An electric heating device installation position 14 and a temperature control installation position 15 are provided outside the sealing plate 13. A heat insulation plate 16 is provided inside the side plate 12 located in the combustion zone 3. In this embodiment, a convex point 17 is provided inwardly of the side plate 12 located in the combustion zone 3, and the heat insulation plate is attached to the convex point 17. The heat insulation plate 16 and the side plate 12 are further isolated from heat loss by using the convex point 17.

Claims

1. A heat exchanger, comprising a shell (1), a heat exchange tube group (2) is provided above the shell (1), a combustion zone (3) is provided below the shell (1), a water inlet interface (21) and a water outlet interface (22) are provided on the heat exchange tube group (2), the heat exchange tube group (2) comprises a plurality of heat exchange tubes (23), and fins (4) are provided on the heat exchange tube group (2), characterized in that: The fin (4) comprises a plurality of openings (41) through which the heat exchange tube group (2) is penetrated, and fixed flanges (42) connected to the heat exchange tube group (2) are provided at the openings (41), and notches (43) are provided at the lower ends of both sides of the heat exchange tube (23), and flame guide flanges (44) are provided above the notches (43), and the fixed flanges (42) and flame guide flanges (44) of adjacent fins (4) are respectively arranged in close contact with each other.

2. The heat exchanger according to claim 1, characterized in that: A spiral turning plate (5) is provided in the heat exchange tube (23), and the spiral turning plate (5) causes the water flow to turn up and down.

3. The heat exchanger according to claim 1, characterized in that: The heat exchange tubes (23) are arranged in two rows, one above the other.

4. The heat exchanger according to claim 2 or 3, characterized in that: There are at least three heat exchange tubes (23) in each row, and the water inlet interface (21) or the water outlet interface (22) of the heat exchange tube (23) is arranged in the middle.

5. The heat exchanger according to claim 1, characterized in that: The fin (4) is provided with a welding notch (45), the welding notch (45) is arranged just above or just below the heat exchange tube (23), and the welding notch (45) extends from the edge of the fin (4) to the fixed flange (42).

6. The heat exchanger according to claim 1, characterized in that: The shell (1) comprises end plates (11) at both ends, each of which is provided with through holes for passing heat exchange tubes (23), and side plates (12) located on both sides.

7. The heat exchanger according to claim 1, characterized in that: Sealing plates (13) are provided on both sides of the heat exchange tube group (2).

8. The heat exchanger according to claim 7, characterized in that: The sealing plate (13) is provided with an electric heating device installation position (14) and a temperature control installation position (15) outside.

9. The heat exchanger according to claim 6, characterized in that: The side plate (12) is located inside the combustion zone (3) and is provided with a heat insulation plate (16).

10. The heat exchanger according to claim 9, characterized in that: The side plate (12) is located in the combustion zone (3) and is provided with a protrusion (17) pressed inwardly, and the heat insulation plate is attached to the protrusion (17).

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