CN214010083U - Heat exchange fin, heat exchange fin assembly and heat exchanger - Google Patents
Heat exchange fin, heat exchange fin assembly and heat exchanger Download PDFInfo
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- CN214010083U CN214010083U CN202022767000.8U CN202022767000U CN214010083U CN 214010083 U CN214010083 U CN 214010083U CN 202022767000 U CN202022767000 U CN 202022767000U CN 214010083 U CN214010083 U CN 214010083U
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- heat exchange
- flue gas
- water conservancy
- conservancy diversion
- heat
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Abstract
The utility model discloses a heat transfer fin, heat transfer fin subassembly and heat exchanger, heat transfer fin includes the heat transfer base plate, a plurality of water conservancy diversion portions and a plurality of water conservancy diversion structure, be provided with a plurality of heat exchange tube mounting holes on the heat transfer base plate, the week side of heat exchange tube mounting hole is located to water conservancy diversion portion and is connected in the heat transfer base plate, water conservancy diversion structural connection is in the heat transfer base plate, the interval sets up between the adjacent water conservancy diversion structure, so that be located the flue gas flow direction of below water conservancy diversion portion week side to the week side that is located top water conservancy diversion portion, it is formed with the flue gas recirculation zone to be located between top water conservancy diversion portion and the water conservancy diversion structure. The heat exchange fin has the advantages that the flow guide structure is arranged, so that when high-temperature flue gas below flows through the lower surface of the flow guide structure, the ascending path is changed, the high-temperature flue gas flows to the peripheral side of the flow guide part above, and the high-temperature flue gas is in full contact with the heat exchange tube for heat exchange; meanwhile, as the flue gas is blocked by the upper flow guide part on the ascending path, part of the high-temperature flue gas flows into the flue gas backflow area, the heat exchange time of the high-temperature flue gas and the heat exchange fins is prolonged, and the heat exchange efficiency is improved.
Description
Technical Field
The utility model relates to a heat transfer fin, heat transfer fin subassembly and heat exchanger.
Background
The heat exchanger is an important heat exchange part of the gas water heater, and the cold water flowing through the heat exchanger is heated by using high-temperature smoke generated by gas combustion. The heat exchanger mainly exchanges heat through the heat exchange fins. When high-temperature flue gas flows through the heat exchange fins, the heat exchange fins are heated, and then heat is transferred to cold water by the heat exchange fins. At present, high temperature flue gas dwell time is short when flowing through heat transfer fin, leads to partly heat not to carry out abundant heat transfer and directly taken away by the flue gas with heat transfer fin, causes certain calorific loss.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a radiating fin, heat transfer fin subassembly and heat exchanger in order to overcome the defect that heat transfer fin heat exchange efficiency among the prior art is low.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
a heat exchange fin, comprising:
the heat exchange base plate is provided with a plurality of heat exchange tube mounting holes;
the flow guide parts are arranged on the periphery of the heat exchange tube mounting holes and connected to the heat exchange substrate;
a plurality of water conservancy diversion structures, the water conservancy diversion structure connect in the heat transfer base plate, it is adjacent the interval sets up between the water conservancy diversion structure to make and be located the below the flue gas of water conservancy diversion portion week side flows to being located the top week side of water conservancy diversion portion is located the top water conservancy diversion portion with be formed with flue gas backward flow district between the water conservancy diversion structure.
In the scheme, the heat exchange fin changes the ascending path when high-temperature flue gas flows through the lower surface of the flow guide structure by arranging the flow guide structure, flows to the periphery of the flow guide part at the upper part, and is in full contact with the heat exchange tube for heat exchange, so that the heat exchange efficiency is improved; meanwhile, as the high-temperature flue gas is blocked by the upper flow guide part on the ascending path, part of the high-temperature flue gas flows into the flue gas backflow area and is discharged after flowing in the flue gas backflow area, the heat exchange time of the high-temperature flue gas and the heat exchange fins is prolonged, and the heat exchange efficiency of the heat exchange fins is improved.
Preferably, the lower surface of the flow guide structure is in a V-shaped structure.
In this scheme, the water conservancy diversion structure sets up between the heat exchange tube mounting hole, and the water conservancy diversion portion of two parts and direction both sides respectively can be separated into with the high temperature flue gas to the water conservancy diversion structure of V font structure for the high temperature flue gas all flows around the week side of heat exchange tube, improves heat exchange efficiency.
Preferably, the middle part of the lower surface of the V-shaped structure is in a circular arc structure.
In this scheme, adopt above-mentioned structural style, the high temperature flue gas of being convenient for is in the same direction as smooth flowing through, prevents that the water conservancy diversion structure from blockking the flue gas and causing the velocity of flow reduction of flue gas, improves smoke exhaust effect.
Preferably, the upper surface of the flow guide structure is in a V-shaped structure.
In this scheme, adopt above-mentioned structural style, be convenient for form the flue gas backward flow district in bigger space for more high temperature flue gases flow in the backward flow district, improve high temperature flue gas and heat transfer fin's heat transfer effect.
Preferably, the middle part of the upper surface of the V-shaped structure is in a circular arc structure.
In this scheme, adopt above-mentioned structural style, be convenient for to the smooth direction of high temperature flue gas, prevent that flue gas backward flow district from having the dead angle, influencing the heat transfer effect.
Preferably, the inner side of the flow guide part is fixedly connected with the peripheral surface of the heat exchange tube.
In this scheme, adopt above-mentioned structural style for heat transfer fin passes through water conservancy diversion portion and heat exchange tube and is connected formation body structure, improves the heat transfer effect.
Preferably, the heat exchange substrate is made of stainless steel.
In this scheme, stainless steel's heat transfer fin has anticorrosive anti-scaling's characteristic, can not exert an influence to the quality of water through gas heater, more is fit for the operation of the small fire under the long-term preheating state.
The utility model provides a heat exchange fin assembly, heat exchange fin assembly includes at least two foretell heat exchange fins, at least two the heat exchange fins is followed the axial direction of heat exchange tube mounting hole piles up the setting to form the flue gas runner.
In this scheme, adopt above-mentioned structural style for the area of contact of heat transfer fin and heat exchange tube increases, improves the heat transfer effect. A flue gas flow channel is formed by the adjacent heat exchange fins, so that the heat exchange effect is improved, and meanwhile, smoke exhaust is facilitated.
Preferably, the positions of the heat exchange fins in the flue gas recirculation zone are hollowed out, so that the flue gas recirculation zones of the heat exchange fins are communicated with each other.
In this scheme, the position fretwork of flue gas backward flow district position alleviates heat transfer fin's weight, save material. Meanwhile, the hollow structure can increase the space of the flue gas backflow area, more high-temperature flue gas can be conveniently accommodated, the high-temperature flue gas flows among the heat exchange fins and exchanges heat, and the flue gas heat exchange effect is improved.
A heat exchanger comprises a heat exchange tube and further comprises the heat exchange fin assembly, and the heat exchange tube is mounted in a heat exchange tube mounting hole.
In this scheme, have rivers to flow through in the heat exchange tube, install heat transfer fin subassembly on the heat exchange tube, be provided with the water conservancy diversion structure on the heat transfer fin subassembly for with the flue gas as far as possible direction heat exchange tube wall, increase heat transfer area improves heat exchange efficiency.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The utility model discloses an actively advance the effect and lie in: this heat transfer fin makes the high temperature flue gas of below when the surface of flow guide structure is being flowed through to the setting up water conservancy diversion structure, changes the ascending route, and the week side of the water conservancy diversion portion of flow direction top fully contacts the heat transfer with the heat exchange tube, improves heat exchange efficiency. Meanwhile, as the flue gas is blocked by the upper flow guide part on the ascending path, part of the high-temperature flue gas flows into the flue gas backflow area and is discharged after flowing in the flue gas backflow area, the heat exchange time of the high-temperature flue gas and the heat exchange fins is prolonged, and the heat exchange efficiency of the heat exchange fins is improved.
Drawings
Fig. 1 is a schematic structural view of a heat exchange fin according to a preferred embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a heat exchanger according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a heat exchanger according to a preferred embodiment of the present invention.
Fig. 4 is a schematic structural view of a heat exchange fin assembly according to a preferred embodiment of the present invention.
Description of reference numerals:
Heat exchange base plate 1
Flue gas recirculation zone 13
Heat exchange tube mounting hole 14
Heat exchange fin assembly 2
Flue gas flow direction 20
Flue gas flow path 40
Field of area A
B field
C area field
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
As shown in fig. 1 to 4, the present embodiment discloses a heat exchange fin, where the heat exchange fin 10 includes a heat exchange base plate 1, a flow guiding portion 11 and a flow guiding structure 12, and the number of the flow guiding portion 11 and the number of the flow guiding structure 12 are both multiple. The heat exchange tube mounting holes 14 are arranged on the heat exchange substrate 1 at intervals, and the flow guide part 11 is arranged on the periphery of the heat exchange tube 30 mounting hole 14 and connected to the heat exchange substrate 1. The flow guide structures 12 are connected to the heat exchange substrate 1, and the adjacent flow guide structures 12 are arranged at intervals, so that the flue gas on the periphery of the lower flow guide part 11 flows to the periphery of the upper flow guide part 11, and a flue gas recirculation zone 13 is formed between the upper flow guide part 11 and the flow guide structures 12. The flue gas flow direction 20 is indicated by the arrow mark in figure 2.
In this embodiment, the heat exchange fin 10 changes the ascending path by providing the flow guide structure 12 when the high-temperature flue gas flows through the lower surface of the flow guide structure 12, and the high-temperature flue gas flows to the peripheral side of the flow guide part 11 above and fully contacts the heat exchange tube 30, so as to improve the heat exchange efficiency. Meanwhile, as the high-temperature flue gas is blocked by the upper flow guide part 11 on the ascending path, part of the high-temperature flue gas flows into the flue gas reflux area 13 and is discharged after the flue gas reflux area 13 circulates, the heat exchange time of the high-temperature flue gas and the heat exchange fins 10 is prolonged, and the heat exchange efficiency of the heat exchange fins 10 is improved.
As shown in fig. 1 and 2, the flow guide structure 12 is disposed between the heat exchange pipe installation holes 14. A stable flue gas recirculation zone 13 is formed in the vicinity of the flow guiding structure 12 and the flow guiding portion 11. The formation of the flue gas recirculation zone 13 enables the flow in the heat exchanger to be relatively stable, and meanwhile, the heat exchange process of the high-temperature flue gas between the adjacent heat exchange fins 10 is prolonged, and the heat exchange efficiency is improved.
In order to guide as much flue gas as possible to the peripheral side of the heat exchange tube 30, the lower surface of the flow guide structure 12 is in a V-shaped structure, so that the high-temperature flue gas can be divided into two parts and respectively guided to the flow guide parts 11 at the two sides of the flow guide structure 12, the high-temperature flue gas flows around the peripheral side of the heat exchange tube 30, and the heat exchange efficiency is improved. Preferably, the middle part of the lower surface of the V-shaped structure is in a circular arc-shaped structure 121, so that high-temperature flue gas smoothly flows through, the flow guiding structure 12 is prevented from blocking the flue gas to reduce the flow velocity of the flue gas, and the smoke exhaust effect is improved.
Furthermore, the upper surface of the flow guide structure 12 is also in a V-shaped structure, so that a smoke reflux area 13 with a larger space is formed conveniently, more high-temperature smoke stays in the reflux area, and the heat exchange effect between the high-temperature smoke and the heat exchange fins 10 is improved. Preferably, the middle part of the upper surface of the V-shaped structure is of a circular arc-shaped structure 121, so that high-temperature flue gas can be guided smoothly, and the flue gas backflow area 13 is prevented from having dead angles and affecting the heat exchange effect.
The heat exchange tube 30 is tightly assembled with the heat exchange tube mounting hole 14, and the flow guide part 11 is welded on the outer wall of the heat exchange tube 30, so that the heat exchange fins 10 are connected with the heat exchange tube 30 through the flow guide part 11 to form an integral structure, no gap exists in heat transfer, and the heat exchange effect is improved.
The welding positions 141 of welding rods are designed at the upper parts of the heat exchange tubes 30, so that the heat exchange tubes 30 are conveniently welded to the heat exchange fins 10 in sequence, stress points of the heat exchange tubes 30 are consistent, directions of the heat exchange tubes 30 during thermal expansion or contraction are consistent, torsion during heating or cooling is prevented, and the whole appearance is neat and attractive.
The heat exchange base plate 1 is made of stainless steel, has the characteristics of corrosion resistance and scale resistance, does not influence the water quality flowing through the gas water heater, and is more suitable for small-fire operation in a long-term preheating state. Compared with the heat exchanger made of phosphorus deoxidized copper, the stainless steel heat exchanger with the same volume has lower production cost. The heat exchange fin 10 is simple in structure, good in heat exchange effect and lower in processing requirement and assembly requirement. The heat exchange fin 10 only keeps the effective heat exchange area around the heat exchange tube 30 and is provided with the hollow structure, so that the overall weight of the heat exchanger can be effectively reduced while materials are saved, and the overall assembly difficulty and the production cost of the gas water heater are reduced.
As shown in fig. 2, the flow process of the high-temperature flue gas on the heat exchange fin 10 is as follows: the gas is ignited below the heat exchange fins 10, and the heat exchange tubes 30 below are wrapped by the flame or high-temperature flue gas to exchange heat with the heat exchange tubes 30. Meanwhile, the high-temperature flue gas between the adjacent heat exchange tubes 30 is divided and guided by the upper flow guide structure 12, so that a part of the high-temperature flue gas flows to the flow guide part 11 on the peripheral side of the upper heat exchange tube 30, and the other part of the high-temperature flue gas flows into the flue gas recirculation zone 13. After the high-temperature flue gas flows in the flue gas reflux area 13, the high-temperature flue gas can flow along the upper part, and also can flow between the adjacent heat exchange fins 10 along the hollowed holes, so that the contact area between the high-temperature flue gas and the heat exchange fins 10 is increased, the contact time is prolonged, and the heat exchange effect is improved.
The temperature on the heat exchange fins 10 is gradually changed from bottom to top. Because the gas is arranged below, the temperature of the flue gas in the heat exchange fins 10, which is closer to the field A where the gas is combusted, is the highest, then the flue gas flows back to the field B after rising to exchange heat with the heat exchange tubes 30 and the flow guide parts 11 on the peripheral sides, the temperature of the flue gas is gradually reduced, and finally the flue gas flows to the heat exchange tubes 30 above and exchanges heat with the heat exchange tubes and finally reaches the field C. Since the flue gas in the zone C field is at the end of the flue gas flow channel 40, the temperature is lowest.
The flue gas flow velocity over the heat exchanger fins 10 is also different. The flue gas velocity of the A area field is the highest, the flue gas velocity of the C area field is the second highest, and the flue gas velocity of the B area field is the lowest. The A area field is closer to the flame of gas combustion and has the highest temperature, so the flue gas flow rate is fastest. The C field is located on the flue gas flow path but is partially blocked by the heat exchange tubes 30 and the flow rate drops. The flue gas in the B area field is guided by the flow guide structure 12 to flow back, and the flow velocity of the flue gas is relatively slow compared with that of the flue gas in the A area field and the C area field.
Because the cold water flows in the heat exchange tube 30, the flow velocity of the flue gas around the heat exchange tube 30 is slower and the temperature is lower due to the obstruction of the heat exchange tube 30.
As shown in fig. 3 and 4, the heat exchange fin assembly 2 comprises at least two heat exchange fins 10. At least two heat exchange fins 10 are stacked along the axial direction of the heat exchange tube mounting hole 14, so that the contact area between the heat exchange fins 10 and the heat exchange tube 30 is increased, and the heat exchange effect is improved. Meanwhile, a flue gas channel 40 is defined between adjacent heat exchange fins 10, so that smoke discharge is facilitated. Preferably, the position of the flue gas recirculation zone 13 in the heat exchange fin 10 is hollowed, so that the weight of the heat exchange fin 10 can be reduced, and materials are saved. Meanwhile, the hollow structure can increase the space of the flue gas reflux area 13, so that more high-temperature flue gas can be conveniently accommodated, the flue gas reflux areas 13 of the heat exchange fins 10 are communicated with each other, the high-temperature flue gas flows among the heat exchange fins 10 and exchanges heat, and the flue gas heat exchange effect is improved.
As shown in fig. 3, a heat exchanger includes a heat exchange tube 30 and a heat exchange fin assembly 2. The heat exchange tube 30 is arranged in the heat exchange tube mounting hole 14 and welded on the heat exchange fin 10, and water flows through the heat exchange tube 30. The heat exchange tube 30 is provided with a heat exchange fin assembly 2, and the heat exchange fin assembly 2 is provided with a flow guide structure 12 for guiding the flue gas to the wall surface of the heat exchange tube 30 as much as possible, increasing the heat exchange area and improving the heat exchange efficiency.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. A heat exchange fin, comprising:
the heat exchange base plate is provided with a plurality of heat exchange tube mounting holes;
the flow guide parts are arranged on the periphery of the heat exchange tube mounting holes and connected to the heat exchange substrate;
a plurality of water conservancy diversion structures, the water conservancy diversion structure connect in the heat transfer base plate, it is adjacent the interval sets up between the water conservancy diversion structure to make and be located the below the flue gas of water conservancy diversion portion week side flows to being located the top week side of water conservancy diversion portion is located the top water conservancy diversion portion with be formed with flue gas backward flow district between the water conservancy diversion structure.
2. The heat exchange fin according to claim 1, wherein the lower surface of the flow guide structure is in a V-shaped structure.
3. The heat exchange fin according to claim 2, wherein the middle of the lower surface of the V-shaped structure is in a circular arc shape.
4. The heat exchange fin as claimed in claim 1, wherein the upper surface of the flow guide structure is a V-shaped structure.
5. The heat exchange fin according to claim 4, wherein the middle of the upper surface of the V-shaped structure is in a circular arc shape.
6. The heat exchange fin as claimed in claim 1, wherein the inner side of the flow guide part is adapted to be fixedly connected to the outer circumferential surface of the heat exchange tube.
7. The heat exchange fin of claim 1, wherein the heat exchange base plate is made of stainless steel.
8. A heat exchange fin assembly, characterized in that it comprises at least two pieces of the heat exchange fins as recited in any one of claims 1 to 7, which are stacked in the axial direction of the heat exchange tube mounting hole to form a flue gas flow passage.
9. The heat exchange fin assembly of claim 8, wherein the heat exchange fins are hollowed out at locations where the flue gas recirculation zones are located, so that the flue gas recirculation zones of the heat exchange fins are communicated with each other.
10. A heat exchanger comprising a heat exchange tube, characterized by further comprising the heat exchange fin assembly as recited in claim 8 or 9, said heat exchange tube being mounted to said heat exchange tube mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022767000.8U CN214010083U (en) | 2020-11-25 | 2020-11-25 | Heat exchange fin, heat exchange fin assembly and heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022767000.8U CN214010083U (en) | 2020-11-25 | 2020-11-25 | Heat exchange fin, heat exchange fin assembly and heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214010083U true CN214010083U (en) | 2021-08-20 |
Family
ID=77307114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022767000.8U Active CN214010083U (en) | 2020-11-25 | 2020-11-25 | Heat exchange fin, heat exchange fin assembly and heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214010083U (en) |
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2020
- 2020-11-25 CN CN202022767000.8U patent/CN214010083U/en active Active
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