CN220356141U

CN220356141U - Heat exchanger

Info

Publication number: CN220356141U
Application number: CN202321909091.1U
Authority: CN
Inventors: 宁忠坤; 郭全胜; 殷红; 王成
Original assignee: Chengdu Shihao Electrical Appliance Co ltd
Current assignee: Chengdu Shihao Electrical Appliance Co ltd
Priority date: 2023-07-19
Filing date: 2023-07-19
Publication date: 2024-01-16
Anticipated expiration: 2033-07-19

Abstract

The utility model provides a heat exchanger, which comprises a pipeline and a plurality of fins. The fins are orderly sleeved outside the pipeline, and a circulation gap is arranged between two adjacent fins. The fins are also provided with through holes to allow communication between adjacent two flow gaps. When the heat exchanger is used, if a temperature difference exists between two adjacent circulating gaps when hot gas passes through the plurality of circulating gaps, air convection can be conducted between the two adjacent circulating gaps through the through holes, so that the temperatures of the two adjacent circulating gaps are equivalent, the heat exchange efficiency of each place is not equal due to the fact that the temperature difference of each place is large, and heat exchange is conducted at each place with high heat exchange efficiency. The heat exchange effect of the heat exchanger is guaranteed, and damage to the fins caused by overhigh temperature of partial areas is avoided.

Description

Heat exchanger

Technical Field

The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger.

Background

The heat exchanger is widely applied to equipment such as water heaters and the like as a heat exchange device. The heat exchanger comprises a plurality of fins and pipelines connected with the fins. The heat energy generated by the combustion of the water heater reaches the fins and is further transferred to the pipeline. The water passing through the pipeline absorbs the heat of the fins and can be heated. Since the heating zone is composed of a plurality of burner tips, the temperature above the zone between the burner tips will be lower than the temperature directly above the burner tips, which will cause a temperature difference to exist throughout the heat exchanger. Whereas prior art heat exchangers simply pass hot gas from one side to the other, they do not balance the temperature difference between the fins.

Disclosure of Invention

The utility model aims to provide a heat exchanger, which can communicate a circulation gap so as to enable the temperature of each part of the heat exchanger to be equivalent.

The embodiment of the utility model is realized by the following technical scheme:

a heat exchanger comprises a pipeline and a plurality of fins; the fins are orderly sleeved outside the pipeline, and a circulation gap is arranged between two adjacent fins; the fins are also provided with through holes so as to enable communication between two adjacent circulation gaps.

Further, the fins are convexly provided with baffles at the through holes so as to guide the air flow into the through holes when the air flow passes through the through holes.

Further, the fins are provided with a plurality of through holes for the pipeline to pass through; the plurality of through holes are arranged in two rows along the flowing direction of the air flow; the pipeline comprises a plurality of sections of straight pipes and a plurality of bent pipes connected with the straight pipes, so that the straight pipes and the bent pipes are communicated into a pipeline; the straight pipes are respectively penetrated through one through hole.

Further, guide rings are convexly arranged at the middle points of the two adjacent through holes.

Further, the protruding height of the guide ring is the same as the width of the circulation gap; the inside of the guide ring is a through hole.

Further, 5 through holes are formed; along the flowing direction of the air flow, the first row of the through holes are provided with 3 through holes; two of the through holes of the second row are each located directly in front of one gap of three of the through holes of the first row.

Further, along the circulation direction of the air flow, guide plates are convexly arranged right in front of the two through holes on the two sides of the first row of fins; the guide plates are obliquely arranged, so that the guide plates guide the air flow at two sides of the fins to the two through holes of the second row.

Further, an arc-shaped guide plate is arranged between the two through holes of the second row of fins, so that air flow is guided to the two through holes on two sides through the arc-shaped guide plate.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

when the heat exchanger is used, if a temperature difference exists between two adjacent circulating gaps when hot gas passes through the plurality of circulating gaps, air convection can be conducted between the two adjacent circulating gaps through the through holes, so that the temperatures of the two adjacent circulating gaps are equivalent, the heat exchange efficiency of each place is not equal due to the fact that the temperature difference of each place is large, and heat exchange is conducted at each place with high heat exchange efficiency. The heat exchange effect of the heat exchanger is guaranteed, and damage to the fins caused by overhigh temperature of partial areas is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a heat exchanger according to the present utility model;

FIG. 2 is a schematic view of a fin structure;

FIG. 3 is a schematic view of a fin assembly;

fig. 4 is a schematic structural view of the fin of example 2.

Icon: 1-pipeline, 11-straight pipe, 12-bent pipe, 2-fin, 21-through hole, 22-baffle, 23-through hole, 24-guide ring, 25-guide plate, 3-circulation gap and 4-connecting end.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which a product of the application is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1:

as shown in fig. 1-3, the present utility model provides a heat exchanger comprising a tube 1 and a plurality of fins 2. The fins 2 are orderly sleeved outside the pipeline 1, so that the pipeline 1 connects the fins 2 in series into a whole. A flow gap 3 is provided between two adjacent fins 2, so that the air flow passes through the flow gap 3 from one side of the heat exchanger to the other. The fins 2 are further provided with through holes 21 for communication between adjacent two of the flow gaps 3.

When the heat exchanger is used, if a temperature difference exists between two adjacent circulation gaps 3 when hot gas passes through the plurality of circulation gaps 3, air convection is possibly caused between the two circulation gaps 3 through the through holes 21, so that the temperatures of the two adjacent circulation gaps 3 are equivalent, the heat exchange efficiency of each place is prevented from being unequal due to the fact that the temperature difference of each place is large, and heat exchange is performed at each place with high heat exchange efficiency. The heat exchange effect of the heat exchanger is guaranteed, and damage to the fins 2 caused by overhigh temperature of partial areas is avoided.

In this embodiment, the fins 2 are provided with baffles 22 protruding from the through holes 21, and the baffles 22 can guide the air flowing through the flow gaps 3, so that the air can be guided into the through holes 21 when the air passes through the through holes 21. Thereby facilitating the flow of air between the respective flow gaps 3.

In this embodiment, the fins 2 are provided with a plurality of through holes 23 through which the pipes 1 pass, and the pipes 1 can connect the fins 2 in series through the through holes 23. Along the flow direction of the air flow, a plurality of through holes 23 are arranged in two rows. The pipeline 1 comprises a plurality of straight pipes 11 and a plurality of bent pipes 12 connected with the straight pipes 11, so that the straight pipes 11 and the bent pipes 12 are communicated into one pipeline 1. A plurality of straight pipes 11 are respectively arranged through one through hole 23. The two rows of the through holes 23 are arranged, so that the pipelines 1 are arranged in two rows at the fins 2, heat in the air flow can be absorbed more effectively, and heat exchange efficiency is improved.

In this embodiment, a guide ring 24 is convexly disposed at the midpoint of two adjacent through holes 23. The arrangement of the guide ring 24 enables the air to be guided by the guide ring 24 when passing through, so that the air flows as close to the pipeline 1 as possible, the heat of the air can be absorbed as much as possible, and the heat exchange effect is guaranteed.

In this embodiment, the protruding height of the guide ring 24 is the same as the width of the flow gap 3. This causes the end face of the deflector ring 24 to abut the adjacent fin 2. The inside of the guide ring 24 is provided with a through hole 21, so that a plurality of guide rings 24 are spliced into a pipeline shape. The air in this duct will also flow between the fins 2, thereby reducing the temperature difference. During use, one side of the guide ring 24 is heated, so that the air in the spliced pipeline is heated. The heated air heats the other side of the deflector 24, thereby allowing the air flow to exchange heat as it passes the other side of the deflector 24. This also increases the heat exchange area of the fin 2.

Meanwhile, due to the presence of the pipeline 1, the more heat is absorbed from the part of the fin 2, which is further from the pipeline 1, the lower the temperature of the fin 2 in the region is. Thus, the temperature at the midpoint of the two through holes 23 will be the highest. The midpoint of the two through holes 23 is provided with the through holes 21, so that heat accumulation can be avoided, and the heat can be better absorbed by water in the pipeline 1.

In the present embodiment, 5 through holes 23 are provided. The first row of through holes 23 is provided with 3 holes in the flow direction of the air flow. The second row of through holes 23 is provided with 2. The two through holes 23 of the second row are each located right in front of one gap of the three through holes 23 of the first row. This causes the gas flow through the first row to be redirected to the second row of pipes 1 so that the heat is absorbed as much as possible.

In this embodiment, along the flow direction of the air flow, the fins 2 are provided with guide plates 25 protruding right in front of the two through holes 23 on both sides of the first row. The baffle 25 is inclined such that the baffle 25 directs the air flow on both sides of the fin 2 to the two through holes 23 of the second row. After the gas flow has passed through the first row of pipes 1, its temperature is still relatively high. These hot gases are led via two sets of baffles 25 on both sides to the second row of pipes 1, so that the heat is absorbed again.

In this embodiment, the fin 2 is provided with an arc-shaped baffle 25 between the two through holes 23 of the second row, so that the air flow is guided to the two through holes 23 on both sides through the arc-shaped baffle 25. The curved deflector 25 directs the hot gas between the second row of pipes 1 to the second row of pipes 1, so that the heat is absorbed again.

The fin 2 structure of the embodiment can guide air flow and is provided with the characteristics of double-layer pipelines and the like, so that the heat exchange effect is good. Under the same heat exchange effect, the heat exchanger of the embodiment can be smaller, which is more beneficial to miniaturization of products.

Example 2:

this example is a further optimization of example 1. The fin 2 of the present embodiment is different from that of embodiment 1 in that the structure of the present embodiment is simpler, as shown in fig. 4, and thus the miniaturization of the product is facilitated. Specifically, in this embodiment, only one baffle 22 is located right in front of the two through holes 23 on both sides of the first row, and the side of the baffle 22 close to the air inlet direction is the through hole 21. The baffle 22 here serves both to direct air into the through holes 21 and to direct the air flow at the through holes 23 of the second row. The baffle 22 has two functions, and thus the baffle 25 in embodiment 1 can be reduced, thereby simplifying the structure. In addition, the edge of the fin 2 of the present embodiment is bent with a baffle 25. That is, the guide plate 25 is disposed at the edge of the fin 2, so as to achieve the effect of guiding flow, and simultaneously reduce the width of the fin 2, thereby simplifying the structure.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A heat exchanger, characterized in that: comprises a pipeline (1) and a plurality of fins (2); the fins (2) are orderly sleeved outside the pipeline (1), and a circulation gap (3) is arranged between two adjacent fins (2); the fins (2) are also provided with through holes (21) so as to enable two adjacent circulation gaps (3) to be communicated.

2. The heat exchanger of claim 1, wherein: the fins (2) are convexly provided with baffles (22) at the through holes (21) so as to guide the air flow into the through holes (21) when the air flow passes through the through holes (21).

3. The heat exchanger of claim 2, wherein: the fins (2) are provided with a plurality of through holes (23) for the pipeline (1) to pass through; the plurality of through holes (23) are arranged in two rows along the flowing direction of the air flow; the pipeline (1) comprises a plurality of sections of straight pipes (11) and a plurality of bent pipes (12) connected with the straight pipes (11), so that the straight pipes (11) and the bent pipes (12) are communicated into one pipeline (1); the straight pipes (11) are respectively penetrated through one through hole (23).

4. A heat exchanger according to claim 3, wherein: and guide rings (24) are convexly arranged at the middle points of the adjacent two through holes (23).

5. The heat exchanger of claim 4, wherein: the protruding height of the guide ring (24) is the same as the width of the circulation gap (3); the inside of the guide ring (24) is provided with a through hole (21).

6. The heat exchanger of claim 5, wherein: 5 through holes (23) are formed; along the flow direction of the air flow, the first row of the through holes (23) is provided with 3 through holes; two of the through holes (23) of the second row are each located immediately in front of one gap of three of the through holes (23) of the first row.

7. The heat exchanger of claim 6, wherein: a guide plate (25) is convexly arranged right in front of the two through holes (23) on two sides of the first row of fins (2) along the flowing direction of the air flow; the deflector (25) is inclined so that the deflector (25) directs the air flow on both sides of the fin (2) to the two through holes (23) of the second row.

8. The heat exchanger of claim 7, wherein: the fins (2) are provided with arc-shaped guide plates (25) between the two through holes (23) of the second row, so that air flow is guided to the two through holes (23) on two sides through the arc-shaped guide plates (25).