CN115615215A - Heat exchange device and gas water heater - Google Patents

Abstract

The application belongs to the technical field of water heaters, and particularly relates to a heat exchange device and a gas water heater. The application aims at solving the technical problems of poor sealing property and smoke leakage between the shell of the existing heat exchange pipeline and the heat exchange device. The heat transfer device of this application includes: the heat exchange pipe comprises a heat exchange pipeline, an inner lining plate and an outer end plate, wherein the outer end plate is provided with a first through hole, the inner lining plate is provided with a second through hole opposite to the first through hole, and the edge of the second through hole bends and extends towards the outer end plate to form a lantern ring. The end part of the heat exchange pipeline penetrates through the second through hole and the lantern ring to the outer side of the outer end plate. The heat exchange pipeline expands and deforms, the lantern ring and the second via hole wall are squeezed, the lantern ring is connected with the heat exchange pipeline in an interference mode and is sealed, the lantern ring is sealed with the first via hole, the heat exchange pipeline can be fixed on the end plate assembly, a fixing structure and a sealing structure do not need to be additionally arranged, and the assembly efficiency of the heat exchange device is improved. The heat exchange pipeline is the same with the material of interior welt, avoids having the gap because of warping the difference between heat exchange pipeline and the lantern ring.

Description

Heat exchange device and gas water heater

Technical Field

The application belongs to the technical field of water heaters, and particularly relates to a heat exchange device and a gas water heater.

Background

The gas water heater is also called as a gas water heater, and refers to a gas appliance which takes gas as fuel and transfers heat to cold water flowing through a heat exchange device in a combustion heating mode to achieve the purpose of preparing hot water.

The heat exchange device generally comprises a heat exchange pipeline and a shell, wherein the shell is provided with a through hole, so that the end part of the heat exchange pipeline penetrates out of the shell, and cold water flowing through the heat exchange pipeline in the shell exchanges heat with high-temperature flue gas to prepare hot water. Usually, weld between heat transfer pipeline and the through-hole lateral wall, not only complex operation, and the leakproofness is poor between heat transfer pipeline and the through-hole, has the problem of flue gas leakage.

Disclosure of Invention

In order to solve the above-mentioned problem among the prior art, be the technical problem who solves between current heat transfer pipeline and the heat transfer device's the casing leakproofness poor, have the flue gas leakage promptly, this application provides a heat transfer device and gas heater.

The heat exchange device comprises: the heat exchange tube comprises a heat exchange tube and two end plate assemblies, wherein the two end plate assemblies are arranged at intervals along a first direction; the end plate assembly comprises an inner lining plate and an outer end plate which are connected, and a space is formed between the two inner lining plates to form a heat exchange space; the outer end plate is provided with a first through hole, the inner lining plate is provided with a second through hole opposite to the first through hole, the edge of the second through hole bends and extends towards the outer end plate to form a lantern ring, and one end, far away from the inner lining plate, of the lantern ring penetrates through the first through hole to the outer side of the first through hole; at least part of the heat exchange pipeline is located in the heat exchange space, two ends of the heat exchange pipeline respectively penetrate through the second through holes of the two inner lining plates and extend to the outer side of the outer end plate, the heat exchange pipeline is sealed with the first through holes through the lantern ring, and the material of the heat exchange pipeline is the same as that of the inner lining plates.

In an optional technical solution of the heat exchanging device, the inner lining plate includes an inner plate body and a first fixing flange, the first fixing flange is formed by bending and extending an edge of the inner plate body toward the outer end plate, the first fixing flange is fixedly connected with the outer end plate, and the inner plate body is provided with the second via hole.

In an optional technical solution of the heat exchange device, the inner plate body is provided with a plurality of second through holes, the second through holes are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction; a plurality of first via holes are formed in the outer end plate, and the first via holes and the second via holes are correspondingly arranged; the heat exchange pipeline comprises a plurality of sections of straight pipe sections and a plurality of sections of U-shaped pipe sections, the straight pipe sections extend along the first direction, and two ends of each section of straight pipe section are matched with the lantern rings of the two lining plates; the U-shaped pipe section is located on the outer side of the heat exchange space and connected with two adjacent straight pipe sections to form the S-shaped heat exchange pipeline.

In an optional technical scheme of the heat exchange device, a plurality of convex hulls are arranged on one side of the inner plate body facing the heat exchange space, the convex hulls are arranged at intervals along the second direction, and one second through hole is formed between every two adjacent convex hulls.

In an optional technical solution of the heat exchanging device, the outer end plate includes an outer plate body and a second fixed flange, the second fixed flange is formed by bending and extending an edge of the outer plate body away from the inner lining plate, the second fixed flange is fixedly connected with the first fixed flange, the outer plate body contacts with the inner plate body, and the outer plate body is provided with the first via hole.

In an optional technical scheme of the heat exchange device, the outer plate body protrudes away from the inner plate body to form a reinforcing convex hull; the second fixed flanging is provided with a reinforcing groove, and the reinforcing groove is positioned at the connecting part of the second fixed flanging and the outer plate body; the reinforcing grooves are arranged in a plurality of numbers, and the reinforcing grooves are arranged at intervals along the length direction of the second fixing flanging.

In an optional technical scheme of the heat exchange device, the heat exchange device further comprises a smoke collecting hood, the smoke collecting hood is hermetically connected with part of the second fixed flanging, part of the first fixed flanging is clamped between the smoke collecting hood and the second fixed flanging, and the first fixed flanging clamped between the smoke collecting hood and the second fixed flanging is provided with an avoidance opening; the other part of the second fixed flanging is used for being connected with the combustor shell in a sealing mode, the other part of the first fixed flanging is clamped between the combustor shell and the second fixed flanging, and the first fixed flanging clamped between the combustor shell and the second fixed flanging is provided with the avoiding opening.

In an optional technical solution of the heat exchanging device, a distance between a hole center of the second via hole and the top end of the inner lining plate is greater than a distance between the hole center of the second via hole and the bottom end of the inner lining plate.

In an optional technical scheme of the heat exchange device, the heat exchange device further comprises a plurality of fins, the plurality of fins are sequentially arranged along the length direction of the heat exchange pipeline, and the fins are provided with through holes for the heat exchange pipeline to penetrate through.

The gas water heater includes: the heat exchange device comprises a combustor and the heat exchange device, wherein the heat exchange device is arranged at the top of the combustor, and a heat exchange space of the heat exchange device is communicated with a combustion space of the combustor.

As can be understood by those skilled in the art, the heat exchange device of the gas water heater of the present application comprises: the heat exchange tube comprises a heat exchange tube and two end plate assemblies, wherein the two end plate assemblies are arranged at intervals along a first direction. The end plate assembly comprises an inner lining plate and an outer end plate which are connected, and a heat exchange space is formed between the two inner lining plates at intervals; the outer end plate is provided with a first through hole, the inner lining plate is provided with a second through hole opposite to the first through hole, and the edge of the second through hole bends and extends towards the outer end plate to form a lantern ring. One end of the lantern ring, which is far away from the inner lining plates, penetrates through the first through holes to the outer side of the first through holes, at least part of the heat exchange pipelines are positioned in the heat exchange space, and two ends of each heat exchange pipeline respectively penetrate through the second through holes of the two inner lining plates and the lantern ring to the outer side of the outer end plate. The heat exchange pipeline can be expanded and deformed by utilizing an expansion process, and the lantern ring and the wall of the second via hole are extruded, so that the lantern ring and the heat exchange pipeline are in interference connection and sealed; and the lantern ring is extruded for it is sealed between lantern ring and the first via hole, and make heat transfer pipeline can fix on end plate assembly, need not additionally to set up fixed knot structure and seal structure, does benefit to and simplifies heat transfer device's structure, does benefit to and improves heat transfer device's packaging efficiency. And the heat exchange pipeline is the same with the material of interior welt, has the same deformability, avoids having the gap because of warping the difference between heat exchange pipeline and the lantern ring, does benefit to the seal that improves end plate subassembly and heat exchange pipeline and be connected.

Drawings

The following describes alternative embodiments of the heat exchange device and gas water heater of the present application with reference to the accompanying drawings. The attached drawings are as follows:

FIG. 1 is an exploded view of a gas water heater provided by an embodiment of the present application;

FIG. 2 is an exploded view of a burner and heat exchange device according to an embodiment of the present application;

FIG. 3 is a schematic view of a part of the structure of a heat exchange device according to an embodiment of the present application;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is an exploded view of a portion of the heat exchange device according to an embodiment of the present application;

FIG. 6 is a schematic structural view of an inner lining plate of a heat exchange device according to an embodiment of the present application;

fig. 7 is a schematic structural view of an outer end plate of a heat exchange device according to an embodiment of the present application.

In the drawings: 100: a heat exchange device; 101: an end plate assembly; 102: a heat exchange space; 110: a heat exchange conduit; 111: a straight pipe section; 112: a U-shaped pipe section; 113: connecting the pipe sections; 120: an inner liner plate; 121: a second via hole; 122: a collar; 123: an inner plate body; 1231: a convex hull; 124: a first fixed flange; 1241: avoiding the opening; 130: an outer end plate; 131: a first via hole; 132: an outer panel body; 133: a second fixed flange; 134: reinforcing the convex hull; 135: reinforcing the grooves; 140: a smoke collecting hood; 150: a fin; 151: sealing cotton; 200: a burner housing; 210: a front side plate; 220: a rear side plate; 230: a U-shaped plate; 231: a first side plate; 232: a second side plate; 233: a base plate; 240: a first U-shaped gasket; 300: fire grate; 410: a front wall panel; 420: a rear wall panel; 430: a first side wall panel; 440: a second sidewall plate; 450: a combustion rack; 500: an outer housing; 510: a first half shell; 520: a second half shell; 600: a fan; 710: a second U-shaped gasket; 720: a first gasket; 730: a second gasket; 740: and a third gasket.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely illustrative of the technical principles of the embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application. And can be adjusted as needed by those skilled in the art to suit particular applications.

Furthermore, it should be noted that in the description of the embodiments of the present application, the terms "inside", "outside", and the like indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, but do not indicate or imply that the device or member must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present application.

Furthermore, it should be noted that, in the description of the embodiments of the present application, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the examples of the present application can be understood by those skilled in the art as appropriate.

The gas water heater is also called as a gas water heater, and refers to a gas appliance which takes gas as fuel and transfers heat to cold water flowing through a heat exchange device in a combustion heating mode to achieve the purpose of preparing hot water. The heat exchange device generally includes a heat exchange pipe and a casing, in which a through hole is provided to allow an end of the heat exchange pipe to penetrate to the outside of the casing, and cold water flowing through the heat exchange pipe in the casing exchanges heat with high temperature flue gas to prepare hot water. Usually, weld between heat transfer pipeline and the through-hole lateral wall, not only complex operation, and the leakproofness is poor between heat transfer pipeline and the through-hole, has the problem of flue gas leakage.

In view of this, the heat exchange device of the embodiment of the present application includes a heat exchange pipe and an end plate assembly, where the end plate assembly includes an inner lining plate and an outer end plate, the outer end plate is provided with a first via hole, the inner lining plate is provided with a second via hole opposite to the first via hole, an edge of the second via hole bends and extends toward the outer end plate to form a collar, and the collar passes through the first via hole; the heat exchange pipeline is arranged in the second through hole and the sleeve ring in a penetrating mode, and the heat exchange pipeline and the lining plate are made of the same material. When the fins are fixed on the heat exchange pipeline by using the expansion process, the lantern ring is expanded between the heat exchange pipeline and the first through hole, so that the sealing effect can be achieved, the heat exchange pipeline and the lining plate are made of the same material and have the same deformation stress, and gaps between the heat exchange pipeline and the lantern ring due to different deformations are avoided; the operation is also beneficial to improving the assembly efficiency of the heat exchange device.

The technical scheme of the heat exchange device and the gas water heater of the embodiment of the application is explained in the following by combining the attached drawings.

First, it should be noted that, in the embodiments of the present application, the directional word "front" refers to a side of the gas water heater facing a user, and the directional word "bottom" refers to a side facing the ground. The "front-back direction" and the "longitudinal direction" correspond to the Y-axis in the drawings, the "left-right direction" and the "lateral direction" correspond to the X-axis in the drawings, and the vertical direction corresponds to the Z-axis in the drawings.

Referring initially to fig. 1, fig. 1 is an exploded view of a gas water heater provided in accordance with an embodiment of the present application. The gas water heater of this application embodiment, including combustor and heat transfer device 100, heat transfer device 100 installs at the top of combustor, and heat transfer device 100's heat transfer space communicates with the combustion space of combustor, and the high temperature flue gas that so combustor burning produced can get into in heat transfer device 100 to make heat transfer device 100 carry out the heat exchange with the high temperature flue gas, realize preparing hydrothermal purpose.

The gas water heater of the embodiment of the present application further includes an outer casing 500 and a fan 600. Fan 600 is installed in the bottom of combustor, and fan 600 communicates with the air inlet chamber of combustor. The fan 600 sucks the air in the air inlet cavity, one part of the air enters the combustor for gas combustion, and the other part of the air enters the air channel of the combustor to play a cooling role.

The outer case 500 provides an installation space for the burner, the heat exchanging apparatus 100, the blower 600, and the like. An air inlet is formed in the rear portion of the outer casing 500, and external air enters the outer casing 500 through the air inlet and enters the combustor through the fan 600 under the action of the fan 600.

Illustratively, the outer housing 500 may be a rectangular housing, and the outer housing 500 includes a first half-shell 510 and a second half-shell 520, wherein the first half-shell 510 is a U-shaped plate shell, and the first half-shell 510 includes a front side plate portion, a left side plate portion and a right side plate portion, and the left side plate portion and the right side plate portion are disposed at opposite intervals at the left and right sides of the front side plate portion. The first half-shell 510 is a unitary piece that facilitates assembly of the outer shell 500. Half shell 520 includes fixed connection's rear side board portion, top end board portion and bottom board portion, and top end board portion and bottom board portion are fixed respectively at the top and the bottom of rear side board portion, top end board portion and the top fixed connection of half shell 510, bottom board portion and the bottom fixed connection of half shell 510, the left and right sides of rear side board portion respectively with left side board portion and right side board portion fixed connection. The plate portions of the outer case 500 may be connected by screws, rivets, or the like, but the embodiment of the present invention is not limited thereto.

Fig. 2 is an exploded view of a burner and heat exchange device according to an embodiment of the present application.

With reference to fig. 2, the burner of the embodiment of the present application includes a burner outer housing 200 and a burner inner housing located in the burner outer housing 200, a fire row 300 is installed in the burner inner housing, and a plurality of fire rows 300 are provided, which can form a plurality of flames simultaneously.

The burner housing 200 of the embodiment of the present application includes a front plate 210, a rear plate 220, and a U-shaped plate 230, where the front plate 210 and the rear plate 220 are relatively spaced apart. The rear side of the U-shaped plate 230 is riveted to the rear side plate 220, the front side of the U-shaped plate 230 is screwed to the front side plate 210, and a second U-shaped gasket 240 is provided between the front side of the U-shaped plate 230 and the front side plate 210, so that the burner housing 200 is sealed. The riveting of the rear side plate 220 and the U-shaped plate 230 in the embodiment of the application can not only improve the assembly efficiency, but also provide initial positioning for the threaded connection of the front side plate 210 and the U-shaped plate 230, thereby facilitating the screwing in of screws; the front plate 210 is screw-coupled to the U-shaped plate 230, which is advantageous for securing structural stability and reliability of the burner housing 200.

The U-shaped plate 230 is approximately U-shaped, and the U-shaped plate 230 is an integrated piece, so that the assembling procedures of the combustor shell 200 are reduced, the assembling efficiency is improved, and the risk of flue gas leakage is reduced. The U-shaped plate 230 includes a base plate 233, a first side plate 231, and a second side plate 232, which are integrally formed, the first side plate 231 and the second side plate 232 are oppositely disposed at two ends of the base plate 233 at intervals, and the top ends of the first side plate 231 and the second side plate 232 may be flush.

The rear side plate 220 and the front side plate 210 both protrude from the first side plate 231 and the second side plate 232, and an interval for installing the heat exchange device 100 is formed between a part of the front side plate 210 protruding from the first side plate 231 and a part of the rear side plate 220 protruding from the first side plate 231. So, preceding curb plate 210 and posterior lateral plate 220 all regard as the lateral wall in combustion space and heat transfer space simultaneously for the high temperature flue gas that the combustor burning produced can unobstructed get into heat transfer device 100, so that heat transfer device 100 carries out the heat transfer.

With continued reference to fig. 2, the burner of the present embodiment further includes a burner ledge 450, and the burner ledge 450 and the inner burner shell form a combustion space. The burner block 450 is fixed to the inside of the burner housing 200 for installing the fire grate 460. The combustor inner casing includes a front wall plate 410, a rear wall plate 420, a first side wall plate 430 and a second side wall plate 440, the first side wall plate 430 and the second side wall plate 440 are disposed at an interval, the first side wall plate 430 is located at a left side of the front wall plate 410 and the rear wall plate 420, and the second side wall plate 440 is located at a right side of the front wall plate 410 and the rear wall plate 420. The two sides of the front wall plate 410 are respectively abutted against the first side wall plate 430 and the second side wall plate 440, and the two sides of the rear wall plate 420 are respectively abutted against the first side wall plate 430 and the second side wall plate 440, so that the space between the first side wall plate 430 and the second side wall plate 440 can be ensured, the sufficient combustion space of the fire grate 300 is ensured, and the wall plates are prevented from being seriously deformed by heat; and a deformation space can be reserved for the contraction of each wall plate.

There is a gap between the front wall plate 410 and the front side plate 210, a gap between the rear wall plate 420 and the rear side plate 220, a gap between the first side wall plate 430 and the first side plate 231, and a gap between the second side wall plate 440 and the second side plate 232, and these four gaps allow outside air to enter, thereby reducing the temperature of the combustor inner casing and the combustor outer casing 200.

FIG. 3 is a schematic view of a part of the structure of a heat exchange device according to an embodiment of the present application; FIG. 4 is a top view of FIG. 3; fig. 5 is an exploded view of a part of the structure of a heat exchange device according to an embodiment of the present application.

With reference to fig. 3 to 5, the heat exchange device of the embodiment of the present application includes: heat exchange tubes 110 and two end plate assemblies 101, the two end plate assemblies 101 being spaced apart in a first direction. In the direction shown in the drawing, two end plate assemblies 101 are arranged at intervals in the X-axis direction.

With reference to fig. 3 and 5, the end plate assembly 101 of the embodiment of the present application includes an inner liner plate 120 and an outer end plate 130 connected together, the inner liner plate 120 and the outer end plate 130 may be connected by threads or by clamping, the inner liner plate 120 and the outer end plate 130 may also be connected by spot welding or by die clinching, and the inner liner plate 120 may also be clamped and fixed between the outer end plate 130 and other structures. The two inner lining plates 120 have a space therebetween to form a heat exchange space 102, and the heat exchange tubes 110 between the two inner lining plates 120 are used for exchanging heat with the high temperature flue gas.

The outer end plate 130 is provided with a first via 131, and the inner bushing plate 120 is provided with a second via 121 opposite to the first via 131. Heat exchange tubes 110 are generally circular in cross-section, in which case heat exchange tubes 110 are circular tubes. Accordingly, the first and second via holes 131 and 121 are circular holes. The cross-sectional shapes of the first and second via holes 131 and 121 are identical to the cross-sectional shape of the heat exchange pipe 110, for example, when the cross-section of the heat exchange pipe 110 is an ellipse, the cross-section of the first and second via holes 131 and 121 is an ellipse. The above is not a limitation on the cross-sectional shape of the heat exchange conduit 110. The "cross section" as used herein means a section formed by cutting in a YZ plane.

The edge of the second via hole 121 bends and extends towards the outer end plate 130 to form a collar 122, the shape of the collar 122 is consistent with the shape of the second via hole 121, and the inner diameter of the collar 122 is the same as the diameter of the second via hole 121. One end of the collar 122 away from the inner lining plate 120 passes through the first through hole 131 to the outside of the first through hole 131, and one end of the collar 122 away from the inner lining plate 120 is located on one side of the outer end plate 130 away from the inner lining plate 120.

Referring to fig. 3 and 4, at least a portion of heat exchange tubes 110 is located in heat exchange space 102, and two ends of heat exchange tubes 110 respectively pass through second through holes 121 of two inner lining plates 120 and extend to the outer side of outer end plate 130, where the outer side of outer end plate 130 refers to the side of outer end plate 130 facing away from inner lining plates 120. The heat exchange pipe 110 is sealed with the first through hole 131 by the collar 122, and the material of the heat exchange pipe 110 is the same as that of the inner lining plate 120, for example, the heat exchange pipe 110 is a copper pipe, and the inner lining plate 120 is a copper plate.

Therefore, the heat exchange pipe 110 of the embodiment of the application can utilize the expansion process to expand and deform the heat exchange pipe 110, and press the collar 122 and the hole wall of the second via hole 121, so that the collar 122 and the heat exchange pipe 110 are in interference connection and sealed; and the collar 122 is squeezed, so that the collar 122 and the first via hole 131 are sealed, and the heat exchange pipe 110 can be fixed on the end plate assembly 101, without additionally arranging a fixing structure and a sealing structure, thereby facilitating simplification of the structure of the heat exchange device 100 and improvement of the assembly efficiency of the heat exchange device 100. Moreover, the heat exchange pipe 110 and the inner lining plate 120 are made of the same material and have the same deformation capability, so that a gap between the heat exchange pipe 110 and the sleeve ring 122 due to different deformation is avoided, and the connection tightness between the end plate assembly 101 and the heat exchange pipe 110 is improved.

Fig. 6 is a schematic structural diagram of an inner liner plate of a heat exchange device according to an embodiment of the present disclosure, and with reference to fig. 6, the inner liner plate 120 according to an embodiment of the present disclosure includes an inner plate body 123 and a first fixing flange 124, an edge of the inner plate body 123 bends and extends toward an outer end plate 130 to form the first fixing flange 124, and the first fixing flange 124 may be perpendicular to the inner plate body 123. The first fixing flange 124 is fixedly connected to the outer end plate 130, so as to fixedly connect the inner lining plate 120 and the outer end plate 130. The inner plate body 123 is provided with a second via 121.

Due to the arrangement, the connection position of the inner lining plate 120 and the outer end plate 130 is different from the arrangement position of the second via hole 121, and the inner lining plate 120 and the outer end plate 130 can be prevented from being fixedly connected to influence the penetration of the heat exchange pipeline 110.

Referring to fig. 3 and 4, the heat exchange pipe 110 includes a plurality of straight pipe sections 111 and a plurality of U-shaped pipe sections 112, the straight pipe sections 111 extend along a first direction, in the drawings, the straight pipe sections 111 extend along an X-axis direction, and a part of the straight pipe sections 111 are located in the heat exchange space 102 for exchanging heat with the high-temperature flue gas. U type pipe section 112 is located the heat transfer space 102 outside, and U type pipe section 112 connects two adjacent straight tube sections 111 to form S type heat transfer pipeline 110, do benefit to and improve heat transfer speed and heat transfer efficiency.

Illustratively, four straight pipe sections 111 are arranged, the four straight pipe sections 111 are arranged at intervals along the Y-axis direction, every two adjacent straight pipe sections 111 are connected with one U-shaped pipe section 112 at the left end of the straight pipe sections 111, and the middle two straight pipe sections 111 are connected with one U-shaped pipe section 112 at the right end of the straight pipe sections 111, so as to form an S-shaped heat exchange pipeline 110, and water in the heat exchange pipeline 110 repeatedly enters the straight pipe sections 111 to exchange heat with high-temperature flue gas, so as to be heated. At the right end of the straight pipe section 111, the end portions of the two straight pipe sections 111 at the front and rear sides are respectively connected with a connection pipe section 113 for respectively introducing cold water into the heat exchange pipe 110 and for discharging hot water from the heat exchange pipe 110. Of course, the number of straight tube sections 111 and U-shaped tube sections 112 of heat exchange tube 110 is not limited to the above description.

With reference to fig. 6, a plurality of second via holes 121 are disposed on the inner plate body 123, and the second via holes 121 are arranged at intervals along a second direction, which is perpendicular to the first direction; in the drawing, a plurality of second vias 121 are arranged at intervals in the Y-axis direction. In this way, both ends of each straight tube section 111 are engaged with the collars 122 of the two inner lining plates 120, thereby stably and reliably supporting and fixing the heat exchange pipe 110. Correspondingly, the outer end plate 130 is provided with a plurality of first via holes 131, the first via holes 131 are arranged corresponding to the second via holes 121, and each second via hole 121 corresponds to one first via hole 131.

With continued reference to fig. 6, the inner plate body 123 of the embodiment of the present application is provided with a convex hull 1231 on the side facing the heat exchange space 102, and part of the inner plate body 123 protrudes towards the heat exchange space 102 to form the convex hull 1231. The convex hull 1231 may be a circular convex hull, an oblong convex hull, an elliptical convex hull, or the like, and the shape of the convex hull 1231 is not limited in the embodiments of the present application. This application embodiment is through setting up convex closure 1231 and the fin 150 butt that is close to inner panel body 123 for inner panel body 123 keeps the clearance with heat transfer device 100's fin 150, so that the high temperature flue gas can pass through, avoids heat transfer device 100's fin 150 to hug closely inner panel body 123 and influence heat exchange efficiency. The arrangement of the convex hull 1231 on the inner plate body 123 in the embodiment of the present application can also improve the structural strength of the inner plate body 123.

One convex hull 1231 may be provided, a plurality of convex hulls 1231 may also be provided, and the plurality of convex hulls 1231 may be arranged on the inner plate body 123 in a plurality of ways, for example, the plurality of convex hulls 1231 are arranged at intervals along the second direction (corresponding to the Y axis), and for example, the plurality of convex hulls 1231 are arranged on the inner plate body 123 in a rectangular matrix. In the embodiment of the present application, the plurality of convex hulls 1231 are arranged at intervals along the second direction (corresponding to the Y axis), and one second via 121 is disposed between two adjacent convex hulls 1231; the convex hull 1231 is respectively arranged at the top end of each second via hole 121, and certainly, the convex hull 1231 can also be respectively arranged at the bottom end of each second via hole 121, so that the abutting area can be large, and the gap between the inner plate body 123 and the fin 150 of the heat exchange device 100 is ensured.

Fig. 7 is a schematic structural view of an outer end plate of a heat exchange device according to an embodiment of the present application.

With reference to fig. 7, the outer end plate 130 of the embodiment of the present application includes an outer plate body 132 and a second fixing flange 133, an edge of the outer plate body 132 is bent away from the lining plate 120 to form the second fixing flange 133, and the second fixing flange 133 may be perpendicular to the outer plate body 132. The second fixing flange 133 is fixedly connected with the first fixing flange 124, and the outer plate body 132 is in contact with the inner plate body 123, so that the smoke leakage risk caused by the gap between the outer plate body 132 and the inner plate body 123 is avoided. The outer plate body 132 is provided with a first via hole 131.

By such an arrangement, the connection position of the straight pipe section 111 and the U-shaped pipe section 112 of the heat exchange pipe 110 is far away from the connection position of the inner lining plate 120 and the outer end plate 130, so that the operation and connection are convenient.

With continued reference to fig. 7, the outer plate body 132 protrudes away from the inner plate body 123 to form a reinforcing convex hull 134, and the reinforcing convex hull 134 may be a circular convex hull, an oblong convex hull, an oval convex hull, or the like, and the shape of the reinforcing convex hull 134 is not limited in the embodiment of the present application. The number of the reinforcing convex hulls 134 may be one, and the number of the reinforcing convex hulls 134 may also be multiple, and the plurality of reinforcing convex hulls 134 may be arranged on the outer plate body 132 in multiple ways, for example, the plurality of reinforcing convex hulls 134 are arranged at intervals along the second direction (corresponding to the Y axis), and for example, the plurality of reinforcing convex hulls 134 are arranged on the outer plate body 132 in a rectangular matrix. In the embodiment of the present application, the reinforcing convex hull 134 is an elongated convex hull extending along the Y-axis direction, and the reinforcing convex hull 134 is located above the first via 131. According to the embodiment of the application, the reinforcing convex hulls 134 are arranged on the outer plate body 132, so that the structural strength of the outer plate body 132 is improved, and the influence on the sealing performance of the heat exchange space 102 caused by the deformation of the outer plate body 132 is avoided.

The second fixing flange 133 has a reinforcing groove 135, and the reinforcing groove 135 is located at the joint of the second fixing flange 133 and the outer panel body 132; the reinforcing grooves 135 are provided in plural, and the plural reinforcing grooves 135 are arranged at intervals along the length direction of the second fixing flange 133. When four sides of the rectangular outer plate body 132 are respectively provided with the second fixing flanges 133, each second fixing flange 133 is provided with a plurality of reinforcing grooves 135, and the number of the reinforcing grooves 135 is not limited in the embodiment of the application. So set up, do benefit to and improve the structural strength of planking body 132 and the fixed turn-ups 133 of second, avoid the fixed turn-ups 133 of second to warp and influence the leakproofness of heat transfer space 102.

With reference to fig. 3 and 5, in the embodiment of the present application, the distance between the hole center of the second through hole 121 and the top end of the inner lining plate 120 is greater than the distance between the hole center of the second through hole 121 and the bottom end of the inner lining plate 120, that is, the second through hole 121 is disposed below the center of the inner lining plate 120, such that the distance between the top end of the straight tube section 111 of the heat exchange tube 110 and the top end of the inner lining plate 120 is greater than the distance between the bottom end of the straight tube section 111 and the bottom end of the inner lining plate 120. The straight tube section 111 of heat exchange pipe 110 divides heat exchange space 102 into an upper space and a lower space, and the space above straight tube section 111 may also be called a smoke exhaust space. So set up and make, the space on straight tube section 111 upper portion is greater than the space of straight tube section 111 lower part to make heat transfer device 100 have sufficient space of discharging fume, make things convenient for the flue gas after the heat transfer to discharge.

With continued reference to fig. 3 and 5, the heat exchange device 100 of the embodiment of the present application further includes a plurality of fins 150, and only one fin 150 is shown in the drawings, which should not be construed as limiting the number of fins 150. A plurality of fins 150 are arranged along the length direction of the straight tube section 111 of the heat exchange pipeline 110 in sequence, the fins 150 are provided with through holes for the heat exchange pipeline 110 to penetrate through, and the heat exchange device 100 of the embodiment of the application improves the heat exchange area by arranging the plurality of heat exchange fins 150, so that the heat exchange efficiency is improved.

In a possible installation manner, the fins 150 are sleeved on the heat exchange pipe 110, and the fins 150 are fixed on the heat exchange pipe 110 through an expansion process, and specifically, a sphere with a diameter larger than the inner diameter of the heat exchange pipe 110 can move from one end of the heat exchange pipe 110 to the other end to press the heat exchange pipe 110 to be thicker, so that the fins 150 are in interference connection with the heat exchange pipe 110. Meanwhile, the heat exchange pipe 110 may be pressed against the collar 122, so that the heat exchange pipe segment 110 is in interference connection with the collar 122, and the collar 122 is pressed, so that the collar 122 is sealed with the first through hole 131.

Optionally, with reference to fig. 2, sealing cotton 151 is respectively disposed on the front side and the rear side of the fin 150, and is used for sealing two ends of the fin 150, so as to prevent the high-temperature flue gas from passing through and losing from two ends of the fin 150, so that the high-temperature flue gas can exchange heat through the fin 150, which is beneficial to improving the heat utilization efficiency.

With continued reference to fig. 2, the heat exchange device 100 of the embodiment of the present application further includes a smoke collecting hood 140, the smoke collecting hood 140 is installed at the top end of the heat exchange space 102, and a smoke exhaust duct is provided on the smoke collecting hood 140 for exhausting smoke.

With reference to fig. 5 to 7, in some possible implementations, the inner plate body 123 is a rectangular plate, and four side edges of the inner plate body 123 respectively extend toward the outer end plate 130 to form four first fixing flanges 124. The outer plate body 132 is a rectangular plate, and four sides of the outer plate body 132 are bent and extended away from the inner lining plate 120 respectively to form four second fixed flanges 133.

The fume collecting hood 140 is sealingly connected with part of the second fixing flange 133, for example, the fume collecting hood 140 is threadedly connected with part of the second fixing flange 133, and the fume collecting hood 140 and part of the second fixing flange 133 are provided with gaskets. Part of the first fixing flange 124 is clamped between the smoke collecting hood 140 and the second fixing flange 133, and the first fixing flange 124 clamped between the smoke collecting hood 140 and the second fixing flange 133 is provided with an escape opening 1241. Specifically, the first side and the second side of the smoke collecting cover 140 are respectively in threaded connection with the second fixing flange 133 at the top, and the first fixing flange 124 at the top is clamped between the smoke collecting cover 140 and the second fixing flange 133. And the rear end of the smoke collecting cover 140 is screwed with the rear side plate 220, and the first side, the second side and the rear side of the smoke collecting cover 140 are provided with second U-shaped sealing rings 710, so that the smoke collecting cover 140 is sealed with the second fixing flange 133 at the top and the rear side plate 220.

The other part of the second fixing flange 133 is used for being connected with the burner housing 200 in a sealing manner, the other part of the first fixing flange 124 is clamped between the burner housing 200 and the second fixing flange 133, and the first fixing flange 124 clamped between the burner housing 200 and the second fixing flange 133 is provided with an avoiding opening 1241.

Specifically, the second fixing flanges 133 at the bottoms of the two end plate assemblies 101 are respectively in threaded connection with the top ends of the first side plate 231 and the second side plate 232 and are provided with first sealing gaskets 720, the first fixing flange 124 at the bottom of the left side is clamped between the second fixing flange 133 and the first side plate 231, and the first fixing flange 124 at the bottom of the right side is clamped between the second fixing flange 133 and the second side plate 232. Further, the top end of the first side wall plate 430 of the combustor inner casing is hung on the top end of the first side plate 231, and the top end of the first side wall plate 430 is sandwiched between the second fixing flange 133 and the first side plate 231.

The second fixing flange 133 on the front side is in threaded connection with the top end of the front side plate 210 and is provided with a gasket, in the embodiment of the present application, two ends of the first U-shaped gasket 240 extend upward to a position between the second fixing flange 133 on the front side and the front side plate 210, so that the second fixing flange 133 on the front side is sealed with the front side plate 210. The first fixing flange 124 on the front side is clamped and fixed between the second fixing flange 133 and the front side plate 210; the second fixing flange 133 at the rear side is in threaded connection with the top end of the rear side plate 220 and is provided with a second seal gasket 730, and the first fixing flange 124 at the rear side is clamped and fixed between the second fixing flange 133 and the rear side plate 220. The top end of the second side wall plate 440 of the combustor inner casing is hung on the top end of the second side plate 232, and the top end of the first side wall plate 430 is clamped and fixed between the second fixing flange 133 and the front side plate 210.

The front end of the smoke collecting cover 140 is in threaded connection with the front side plate 210, and a third gasket 740 is arranged between the front end of the smoke collecting cover 140 and the front side plate 210. The rear wall plate 420 of the burner inner casing is hung on the rear side plate 220, and the rear wall plate 420 is sandwiched and fixed between the rear side plate 220 and the rear end of the smoke collection cover 140. The front wall plate 420 of the inner combustor casing is sandwiched and fixed between the front side plate 210 and the U-shaped plate 230.

So set up, collection petticoat pipe 140, heat transfer device 100 and combustor shell 200 enclose airtight and the heat transfer space 102 and the combustion space of intercommunication, avoid the flue gas to leak. And when realizing outside sealing connection, fixed connection combustor inner shell need not additionally to set up fixed knot and constructs, does benefit to simplified structure, improves gas heater's packaging efficiency.

To sum up, the gas heater of this application embodiment, its heat transfer device 100 includes: heat exchange tubes 110 and two end plate assemblies 101, the two end plate assemblies 101 being arranged at a distance along a first direction. The end plate assembly 101 comprises a lining plate 120 and an outer end plate 130 which are connected, and a heat exchange space 102 is formed between the two lining plates 120 at intervals; the outer end plate 130 is provided with a first via 131, the inner lining plate 120 is provided with a second via 121 opposite to the first via 131, and an edge of the second via 121 bends and extends towards the outer end plate 130 to form a collar 122. One end of the collar 122 away from the inner lining plates 120 passes through the first through hole 131 to the outside of the first through hole 131, at least a part of the heat exchange tubes 110 is located in the heat exchange space 102, and two ends of the heat exchange tubes 110 respectively pass through the second through holes 121 of the two inner lining plates 120 and the collar 122 to the outside of the outer end plate 130. In the embodiment of the application, the heat exchange pipe 110 can be expanded and deformed by using an expansion process, and the sleeve ring 122 and the hole wall of the second via hole 121 are pressed, so that the sleeve ring 122 and the heat exchange pipe 110 are in interference connection and sealed; and the collar 122 is squeezed, so that the collar 122 and the first via hole 131 are sealed, and the heat exchange pipe 110 can be fixed on the end plate assembly 101, without additionally arranging a fixing structure and a sealing structure, thereby facilitating simplification of the structure of the heat exchange device 100 and improvement of the assembly efficiency of the heat exchange device 100. Moreover, the heat exchange pipe 110 and the inner lining plate 120 are made of the same material and have the same deformation capability, so that a gap between the heat exchange pipe 110 and the sleeve ring 122 due to different deformation is avoided, and the connection tightness between the end plate assembly 101 and the heat exchange pipe 110 is improved.

So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.

Claims (10)

1. A heat exchange device, comprising: the heat exchange tube comprises a heat exchange tube and two end plate assemblies, wherein the two end plate assemblies are arranged at intervals along a first direction;

the end plate assembly comprises an inner lining plate and an outer end plate which are connected, and a space is formed between the two inner lining plates to form a heat exchange space; the outer end plate is provided with a first through hole, the inner lining plate is provided with a second through hole opposite to the first through hole, the edge of the second through hole bends and extends towards the outer end plate to form a lantern ring, and one end, far away from the inner lining plate, of the lantern ring penetrates through the first through hole to the outer side of the first through hole;

at least part of the heat exchange pipeline is located in the heat exchange space, two ends of the heat exchange pipeline respectively penetrate through the second through holes of the two inner lining plates and extend to the outer side of the outer end plate, the heat exchange pipeline is sealed with the first through holes through the lantern ring, and the material of the heat exchange pipeline is the same as that of the inner lining plates.

2. The heat exchange device of claim 1, wherein the inner lining plate comprises an inner plate body and a first fixing flange, the first fixing flange is formed by bending and extending the edge of the inner plate body towards the outer end plate, the first fixing flange is fixedly connected with the outer end plate, and the inner plate body is provided with the second via hole.

3. The heat exchange device according to claim 2, wherein a plurality of second through holes are arranged on the inner plate body, and the second through holes are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction; a plurality of first via holes are formed in the outer end plate, and the first via holes and the second via holes are correspondingly arranged;

the heat exchange pipeline comprises a plurality of straight pipe sections and a plurality of U-shaped pipe sections, the straight pipe sections extend along the first direction, and two ends of each straight pipe section are matched with the lantern rings of the two lining plates; the U-shaped pipe section is located on the outer side of the heat exchange space and connected with two adjacent straight pipe sections to form the S-shaped heat exchange pipeline.

4. The heat exchange device according to claim 3, wherein a plurality of convex hulls are arranged on one side of the inner plate body facing the heat exchange space, the convex hulls are arranged at intervals along the second direction, and one second through hole is formed between every two adjacent convex hulls.

5. The heat exchange device according to any one of claims 2 to 4, wherein the outer end plate comprises an outer plate body and a second fixing flange, the second fixing flange is formed by bending and extending the edge of the outer plate body away from the inner lining plate, the second fixing flange is fixedly connected with the first fixing flange, the outer plate body is in contact with the inner plate body, and the outer plate body is provided with the first through hole.

6. The heat exchange device of claim 5, wherein the outer plate body projects away from the inner plate body to form a reinforcing convex hull;

the second fixed flanging is provided with a reinforcing groove, and the reinforcing groove is positioned at the connecting part of the second fixed flanging and the outer plate body; the reinforcing grooves are arranged in a plurality of numbers, and the reinforcing grooves are arranged at intervals along the length direction of the second fixing flanging.

7. The heat exchange device according to claim 5, further comprising a smoke collecting hood, wherein the smoke collecting hood is in sealing connection with part of the second fixing flanging, part of the first fixing flanging is clamped between the smoke collecting hood and the second fixing flanging, and the first fixing flanging clamped between the smoke collecting hood and the second fixing flanging is provided with an avoiding opening; the other part of the second fixed flanging is used for being connected with the combustor shell in a sealing mode, the other part of the first fixed flanging is clamped between the combustor shell and the second fixed flanging, and the first fixed flanging clamped between the combustor shell and the second fixed flanging is provided with the avoidance opening.

8. The heat exchange device of any one of claims 1 to 4, wherein the distance between the center of the second via hole and the top end of the inner lining plate is greater than the distance between the center of the second via hole and the bottom end of the inner lining plate.

9. The heat exchange device according to any one of claims 1 to 4, further comprising a plurality of fins, wherein the plurality of fins are sequentially arranged along the length direction of the heat exchange pipe, and the fins are provided with through holes for the heat exchange pipe to penetrate through.

10. A gas water heater, characterized in that, comprises a burner and the heat exchanging device of any one of claims 1-9, the heat exchanging device is installed on the top of the burner, and the heat exchanging space of the heat exchanging device is communicated with the burning space of the burner.

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