CN220771963U

CN220771963U - Heat exchange device and gas water heater

Info

Publication number: CN220771963U
Application number: CN202322366762.0U
Authority: CN
Inventors: 卢宇轩; 李新学; 黄波
Original assignee: Guangdong Vanward New Electric Co Ltd
Current assignee: Guangdong Vanward New Electric Co Ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-04-12
Anticipated expiration: 2033-08-31

Abstract

The utility model belongs to the technical field of heat exchange equipment, and discloses a heat exchange device and a gas water heater. The heat exchange device comprises a shell and heat exchange plates and heat exchange tubes arranged in the shell, wherein the heat exchange plates comprise a substrate, a plurality of heat exchange tube holes are formed in the substrate and are distributed transversely in a single row, the horizontal height of each heat exchange tube hole in the middle position is lower than that of each heat exchange tube hole in the two end positions, any one heat exchange tube hole in the middle position is connected with a water outlet pipe, any one heat exchange tube hole in the two end positions is connected with a water inlet pipe and a water outlet pipe, the two ends of each heat exchange tube are respectively connected with the water inlet pipe and the water outlet pipe, and the heat exchange tubes sequentially penetrate through the two heat exchange tube holes in the two end positions along the inner wall of the shell. The heat exchange device can reduce the heat transferred from the two ends of the heat exchange plate to the shell, thereby reducing the surface temperature of the shell and improving the heat exchange efficiency.

Description

Heat exchange device and gas water heater

Technical Field

The utility model relates to the technical field of heat exchange equipment, in particular to a heat exchange device and a gas water heater.

Background

The heat exchange device is a key heat exchange component of the water heater at present, and has higher requirements on materials, manufacturing process and the like, so the cost is higher. In order to save the cost, the current heat exchange device adopts methods including reducing the number of heat exchange tubes and improving the heat efficiency of the heat exchange plates.

The existing heat exchange plates adopt a mode that heat exchange pipe holes are arranged transversely in a single row, the number of the adopted heat exchange pipes is small, and the production cost of the heat exchange device can be saved, but because the water inlet pipe and the water outlet pipe of the heat exchange plates are respectively positioned at two ends of the heat exchange plates, cold water flows from the water inlet pipe to the heat exchange pipes in the heat exchange holes arranged side by side in sequence, and then hot water flows out from the water outlet pipe at the other end, the problem that the hot water in the heat exchange pipes is high in temperature and the high temperature of the shell of the heat exchange device are overlapped is caused, the local temperature is overhigh, the service lives of the heat exchange plates and the shell are influenced, and due to the problems, a part of heat is transferred to the shell of the heat exchange device, the heat exchange efficiency of the heat exchange device is reduced, and the heat efficiency of the water heater is influenced.

Disclosure of Invention

One of the technical problems to be solved by the utility model is to provide a heat exchange device which can reduce the heat transferred from two ends of a heat exchange plate to a shell and improve the heat exchange efficiency.

The second technical problem to be solved by the utility model is to provide the gas water heater, which can reduce the heat transferred from two ends of the heat exchange plate to the shell of the heat exchange device, improve the heat exchange efficiency and prolong the service life of the heat exchange device in the gas water heater.

The first technical problem is solved by the following technical scheme:

a heat exchange device, comprising:

a housing;

the heat exchange plate is arranged in the shell and comprises a base plate, a plurality of heat exchange tube holes are formed in the base plate, the heat exchange tube holes are distributed transversely in a single row, the horizontal height of each heat exchange tube hole in the middle position is lower than that of each heat exchange tube hole in the two ends, any heat exchange tube hole in the middle position is connected with a water outlet pipe, and any heat exchange tube hole in the two ends is connected with a water inlet pipe;

the heat exchange tube is arranged in the shell, two ends of the heat exchange tube are respectively connected with the water inlet pipe and the water outlet pipe, and in the direction from water inlet to water outlet, the heat exchange tube penetrates through two heat exchange tube holes at two ends firstly along the inner wall of the shell, and then penetrates through the rest heat exchange tube holes sequentially.

Compared with the background technology, the heat exchange device has the following beneficial effects:

according to the heat exchange device, the plurality of heat exchange tube holes on the substrate of the heat exchange plate are distributed in a transverse single row, the horizontal height of the heat exchange tube holes at the middle position is lower than that of the heat exchange tube holes at the two ends, the heat exchange tube holes at the two ends are used for being connected with the water outlet pipe, and the heat exchange tube at the two ends is firstly penetrated into the two heat exchange tube holes at the two ends along the inner wall of the shell and then sequentially penetrated into the other heat exchange tube holes in the direction from water inlet to water outlet, so that low-temperature water entering through the water inlet pipe can firstly flow through the heat exchange tubes between the heat exchange tube holes at the two ends of the heat exchange plate, then flows out from the heat exchange tube in the middle heat exchange tube hole, the water temperature of the heat exchange tube between the heat exchange tube holes at the two ends is lower than that of the water in the heat exchange tube passing through the middle heat exchange tube hole, and the two ends of the heat exchange plate can be cooled down due to the relatively lower water temperature of the heat exchange tube at the two ends, so that the heat exchange tube at the two ends of the heat exchange plate can be transmitted to the shell of the heat exchange device from the inner wall of the shell is reduced, the heat exchange efficiency of the shell is improved; as the height of the middle heat exchange tube hole is lower and is closer to the combustion chamber, the heat exchange efficiency of the middle heat exchange tube hole can be ensured.

In one embodiment, an upper concave arc is arranged between any two heat exchange tube holes at the lower edge of the base plate, and a concave arc flanging is arranged at the edge of the upper concave arc.

In one embodiment, a lower convex arc is arranged below each heat exchange tube hole, a convex arc flanging is arranged at the edge of the lower convex arc, and a first notch is arranged on the convex arc flanging.

In one embodiment, the dimension of the male arc flange is smaller than the dimension of the female arc flange in a direction perpendicular to the base plate.

In one embodiment, a first flow guide flange is arranged above the heat exchange tube hole in the middle position, the first flow guide flange is in a V shape with an upward opening, and a second notch is arranged at the vertex of the first flow guide flange.

In one embodiment, a third flow guiding flange is arranged above the middle position between the two heat exchange tube holes, the third flow guiding flange is arc-shaped with two high ends and a low middle, and the lowest point of the third flow guiding flange is lower than the upper edges of the two heat exchange tube holes at the middle position.

In one embodiment, the second diversion flanges are arranged above the heat exchange tube holes at two ends, and the second diversion flanges are transversely arranged.

In one embodiment, both sides of the second diversion flanges are provided with diversion holes.

In one embodiment, two lateral ends of the substrate are respectively provided with a side flanging, and the side flanging is longitudinally arranged.

The second technical problem is solved by the following technical scheme:

a gas water heater comprising the heat exchange device provided by any one of the embodiments above.

Compared with the background technology, the gas water heater has the following beneficial effects:

according to the gas water heater provided by the utility model, the heat exchange pipes and the heat exchange pipe holes in the heat exchange device are transversely arranged in a single row, the horizontal height of the heat exchange pipe at the middle position is lower than that of the heat exchange pipes at the two ends, so that the heat exchange pipe at the middle position can absorb the heat of high-temperature flue gas fastest, and the heat efficiency is further improved; meanwhile, the heat exchange tube penetrates through the two heat exchange tube holes at the two end positions along the inner wall of the shell after being connected with the water inlet tube in the direction from water inlet to water outlet, so that heat exchange between the heat exchange tube at the two end positions and the shell is reduced, the surface temperature of the shell can be reduced, the service life of the shell is prolonged, and the service life of the gas water heater is prolonged, and the service cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a heat exchanger plate in a heat exchange device according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the installation positions of heat exchange plates and heat exchange tubes in a heat exchange device according to an embodiment of the present utility model;

FIG. 3 is a schematic flow diagram of high temperature flue gas on a heat exchanger plate in a heat exchange device according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a heat exchange device according to an embodiment of the present utility model.

Description of the reference numerals:

1. a substrate; 11. heat exchange tube holes; 12. a concave arc flanging; 13. convex arc flanging; 131. a first notch; 14. the first diversion flanging; 141. a second notch; 15. a third diversion flanging; 16. a second diversion flanging; 17. a deflector aperture; 18. side flanging;

2. a heat exchange tube; 3. a water outlet pipe; 4. a water inlet pipe; 5. a housing.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; 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 terms in this application will be understood by those of ordinary skill in the art in a specific context.

The embodiment of the utility model provides a heat exchange device, as shown in fig. 1-4, the heat exchange device comprises a shell 5, heat exchange plates and heat exchange tubes 2, wherein each heat exchange plate comprises a base plate 1, a plurality of heat exchange tube holes 11 are arranged on the base plate 1, the heat exchange tube holes 11 are distributed in a single row transversely, the horizontal height of the heat exchange tube holes 11 at the middle position is lower than that of the heat exchange tube holes 11 at the two end positions, any one heat exchange tube hole 11 at the middle position is connected with a water outlet tube 3, and any one heat exchange tube hole 11 at the two end positions is connected with a water inlet tube 4; the heat exchange tube 2 is arranged in the shell 5, two ends of the heat exchange tube 2 are respectively connected with the water inlet pipe 4 and the water outlet pipe 3, and the heat exchange tube 2 firstly penetrates through two heat exchange tube holes 11 at two ends along the inner wall of the shell 5 and then sequentially penetrates through other heat exchange tube holes 11 in the direction from water inlet to water outlet.

In the embodiment of the utility model, four heat exchange tube holes 11 are arranged on a base plate 1, the four heat exchange tube holes 11 on the base plate 1 are arranged to be distributed transversely in a single row, the horizontal height of the two heat exchange tube holes 11 at the middle position is lower than that of the heat exchange tube holes 11 at the two ends, after the heat exchange tube 2 is installed, the horizontal height of the heat exchange tube 2 at the middle position is lower than that of the heat exchange tube 2 at the two ends, as shown in fig. 3, a height difference delta H is arranged between the heat exchange tube holes 11 at the middle position and the heat exchange tube holes 11 at the two ends, the heat exchange tube holes 11 at the middle position are used for being connected with a water outlet pipe 3, the tube sections of the heat exchange tube 2 connected with the water inlet pipe 4 firstly pass through the two heat exchange tube holes 11 at the two ends along the inner wall of a shell 5, and then sequentially pass through the rest heat exchange tube holes 11 at the middle position, so that hot water flowing through the heat exchange tubes 11 at the two ends passes through the heat exchange tube holes 11 (at the moment is low-temperature water), and then flows out from the middle heat exchange tube 11, the water flowing through the heat exchange tube 11 at the two ends is lower than the heat exchange tube holes 11 at the two ends of the heat exchange tubes 11 at the two ends, and the heat exchange tubes can be cooled down relatively by the heat exchange tube 11 at the two ends, and the heat exchange tube is cooled by the heat exchange tube is relatively low-ends, and the heat exchange tube is cooled by the heat exchange tube 11; because the height of the middle heat exchange tube hole 11 is lower and is closer to the combustion chamber, the heat exchange efficiency of the middle heat exchange tube hole 11 can be ensured, and in summary, the heat exchange device disclosed by the utility model has higher heat exchange efficiency compared with the prior art, and less heat is transferred to the shell 5, so that the service life of the shell 5 is prolonged.

In one embodiment, the lower edge of the base plate 1 is located between any two heat exchange tube holes 11 and provided with an upper concave arc, and the edge of the upper concave arc is provided with a concave arc flanging 12.

As shown in fig. 1, the lower edge of the base plate 1 is in a wave shape, an upper concave arc is arranged between two adjacent heat exchange tube holes 11, a concave arc flanging 12 is arranged at the edge of the upper concave arc, as shown in fig. 3, the concave arc flanging 12 is in a circular arc shape, and flue gas flow can flow in a turbulent flow and guide on the upper surface of the concave arc flanging 12, so that the heat exchange area of the base plate 1 can be increased, and the heat efficiency of a heat exchange plate is improved.

In one embodiment, a lower convex arc is arranged below each heat exchange tube hole 11, a convex arc flanging 13 is arranged at the edge of the lower convex arc, and a first notch 131 is arranged on the convex arc flanging 13 in the extending direction of the lower convex arc.

As shown in fig. 1 and fig. 3, the shape of the lower convex arc is matched with the structure below the heat exchange tube hole 11, the first notch 131 is located right below the heat exchange tube hole 11, and high-temperature flue gas can flow to the two sides of the heat exchange tube hole 11 to rise after passing through the first notch 131, so that the turbulent flow heat exchange guiding effect is achieved. A third gap is arranged between the convex arc flanging 13 and the concave arc flanging 12 and is positioned between the lower edges and the central point connecting lines of the two adjacent heat exchange tube holes 11.

In one of the embodiments, the dimension of the male turned-up edge 13 is smaller than the dimension of the female turned-up edge 12 in a direction perpendicular to the base plate 1. In combination with fig. 1 and 3, the convex arc flanging 13 is a short flanging relative to the concave arc flanging 12, so that a smoke channel is formed between two adjacent substrates 1 at the convex arc flanging 13, and high-temperature smoke can be in direct contact heat exchange with the heat exchange tube 2 in the heat exchange tube hole 11 upwards through the smoke channel at the convex arc flanging 13, so that the heat exchange efficiency is high.

In one embodiment, a first flow guiding flange 14 is disposed above the heat exchange tube hole 11 in the middle position, the first flow guiding flange 14 is V-shaped with an upward opening, and a second notch 141 is disposed at the vertex of the first flow guiding flange 14.

As shown in fig. 1 and 3, the second notch 141 at the vertex of the first diversion flange 14 is right above the heat exchange tube hole 11 at the middle position, and the high-temperature flue gas around the two sides of the heat exchange tube 2 is converged at the second notch 141 and discharged upwards. The embodiment is provided with four heat exchange tube holes 11, the upper parts of the two middle heat exchange tube holes 11 are respectively provided with a first diversion flange 14, a gap is arranged between the two first diversion flanges 14, a third diversion flange 15 in a small concave arc shape is arranged below the gap, the third diversion flange 15 is arranged above the two middle heat exchange tube holes 11, the third diversion flange 15 is in an arc shape with two high ends and low middle, the lowest point of the third diversion flange 15 is lower than the upper edges of the two middle heat exchange tube holes 11, high-temperature flue gas around the heat exchange tube 2 can be diverted to the back parts or the upper parts of the two side heat exchange tube holes 11 at the third diversion flange 15 so as to fully exchange heat, the first diversion flange 14 and the third diversion flange 15 play the roles of increasing the heat exchange area and diversion, improving the heat exchange efficiency at the middle heat exchange tube hole 11, and the first diversion flange 14 in a V-shaped structure is beneficial to diversion the high-temperature flue gas to the left side and the right side, and reducing the high-temperature flue gas resistance.

In one embodiment, the second diversion flanges 16 are arranged above the heat exchange tube holes 11 at two ends, and the second diversion flanges 16 are transversely arranged.

As shown in fig. 1 and 3, the second flow guiding flanges 16 are arranged above the two heat exchange tube holes 11 at two ends, and the high-temperature flue gas around the two sides of the heat exchange tube holes 11 at two ends is discharged upwards after bypassing the two sides of the second flow guiding flanges 16 again, so that the second flow guiding flanges 16 are beneficial to increasing the heat exchange area and residence time of the high-temperature flue gas at the back of the heat exchange tube holes 11 and improving the heat exchange efficiency. The second diversion flanging 16 is transversely arranged, so that the contact area with the high-temperature flue gas is large, the diversion discharge of the two sides of the high-temperature flue gas is facilitated, and the heat exchange efficiency is high. In some embodiments, the second diversion flanges 16 are disposed obliquely upward toward one end of the middle position of the base plate 1, which has the effect of reducing high-temperature flue gas resistance and diversion.

In one embodiment, the second deflector flange 16 is provided with deflector holes 17 on both sides.

As shown in fig. 1 and 3, the flow guide holes 17 are multiple, the flow guide holes 17 are flanging holes, and the flow guide holes 17 are distributed on the left and right sides above the heat exchange tube holes 11 at two ends and are reasonably arranged according to the actual surface area of the substrate 1. In this embodiment, a diversion hole 17 is disposed at the outer side of the second diversion flange 16, and high-temperature flue gas at the edges of two ends of the substrate 1 is exhausted upwards around two sides of the diversion hole 17, and the high-temperature flue gas exchanges heat with the flange of the diversion hole 17. A plurality of diversion holes 17 are arranged on the inner side (between the two heat exchange tube holes 11) of the second diversion flanging 16, and high-temperature flue gas can flow and exchange heat from gaps among the diversion holes 17, so that the heat exchange efficiency is improved.

In one embodiment, the lateral ends of the substrate 1 are provided with side flanges 18, and the side flanges 18 are longitudinally arranged.

As shown in fig. 1, the side flanges 18 are disposed at two ends of the substrate 1, which is beneficial to enhancing the strength of the substrate 1. A slit is arranged between the diversion hole 17 at the outer side of the second diversion flange 16 and the side flanging 18, part of high-temperature smoke can be discharged upwards through the slit, and the high-temperature smoke contacts with the side flanging 18 and the side flanging of the diversion hole 17 for heat exchange in the discharging process. The side flanging 18 is arranged, so that high-temperature flue gas is concentrated in the range of the substrate 1, and the concentrated heat exchange effect is improved.

According to the heat exchange device provided by the embodiment of the utility model, heat exchange is realized by the high-temperature flue gas through the multiple flanging structures arranged on the substrate 1, so that heat can be efficiently and uniformly absorbed below and above the heat exchange tube 2, the heat exchange efficiency is high, and the flue gas resistance is small.

The embodiment of the utility model also provides a gas water heater, which comprises the heat exchange device provided by the embodiment, wherein in the heat exchange device, a plurality of heat exchange plates in the shell 5 are mutually overlapped to form a heat exchange plate group, and the heat exchange tube 2 is arranged in the heat exchange tube hole 11 of the heat exchange plate group in a penetrating way.

In the heat exchange device of the gas water heater, the heat exchange tube 2 preferentially penetrates through the heat exchange tube holes 11 at the two ends along the inner wall of the shell 5 in the direction from water inlet to water outlet, and then penetrates through the rest heat exchange tube holes 11, so that the heat exchange heat obtained by the shell 5 is less, the heat exchange efficiency of the heat exchange tube 2 is improved, the surface temperature of the shell 5 is reduced, the service life of the shell 5 is prolonged, and the heat exchange efficiency of the gas water heater is further improved, and the overall service life of the gas water heater is prolonged.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing detailed description of the embodiments presents only a few embodiments of the present utility model, which are described in some detail and are not intended to limit the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A heat exchange device, comprising:

a housing (5);

the heat exchange plate is arranged in the shell (5), the heat exchange plate comprises a base plate (1), a plurality of heat exchange tube holes (11) are formed in the base plate (1), the heat exchange tube holes (11) are distributed in a single row transversely, the horizontal height of the heat exchange tube holes (11) in the middle position is lower than that of the heat exchange tube holes (11) in the two end positions, any one heat exchange tube hole (11) in the middle position is connected with a water outlet tube (3), and any one heat exchange tube hole (11) in the two end positions is connected with a water inlet tube (4);

the heat exchange tube (2), heat exchange tube (2) are located in casing (5), connect respectively at the both ends of heat exchange tube (2) inlet tube (4) with outlet pipe (3), in the direction from intaking to play water, heat exchange tube (2) are followed the inner wall of casing (5) wears to locate two of both ends position earlier heat exchange tube hole (11) back is worn to establish in proper order again remaining heat exchange tube hole (11).

2. Heat exchange device according to claim 1, wherein the lower edge of the base plate (1) is provided with an upper concave arc between any two heat exchange tube holes (11), and the edge of the upper concave arc is provided with a concave arc flanging (12).

3. Heat exchange device according to claim 2, wherein a lower convex arc is arranged below each heat exchange tube hole (11), the edge of the lower convex arc is provided with a convex arc flanging (13), and the convex arc flanging (13) is provided with a first gap (131).

4. A heat exchange device according to claim 3, wherein the size of the male (13) is smaller than the size of the female (12) flange in a direction perpendicular to the base plate (1).

5. The heat exchange device according to claim 2, wherein a first flow guiding flange (14) is arranged above the heat exchange tube hole (11) at the middle position, the first flow guiding flange (14) is V-shaped with an upward opening, and a second notch (141) is arranged at the vertex of the first flow guiding flange (14).

6. The heat exchange device according to claim 5, wherein a third flow guiding flange (15) is arranged above the middle position between the two heat exchange tube holes (11), the third flow guiding flange (15) is in an arc shape with high ends and low middle, and the lowest point of the third flow guiding flange (15) is lower than the upper edges of the two heat exchange tube holes (11) at the middle position.

7. The heat exchange device according to claim 1, wherein a second flow guiding flange (16) is arranged above the heat exchange tube holes (11) at two ends, and the second flow guiding flange (16) is transversely arranged.

8. Heat exchange device according to claim 7, wherein the second deflector flange (16) is provided with deflector holes (17) on both sides.

9. Heat exchange device according to any one of claims 1-8, wherein the base plate (1) is provided with side flanges (18) at both lateral ends, the side flanges (18) being arranged longitudinally.

10. Gas water heater, characterized in that it comprises a heat exchange device according to any one of claims 1-9.