CN219367994U - Heat exchanger and gas water heater - Google Patents

Abstract

The application belongs to the technical field of water heaters, and particularly relates to a heat exchanger and a gas water heater. This application aims at solving current heat exchange casing leakproofness poor, has the problem of flue gas leakage. The end plate assembly of the heat exchanger comprises an end plate and an annular reinforcing frame, wherein the end plate comprises a plate body and a flanging, and the flanging is formed by bending the side edge of the plate body away from a heat exchange space; the flanging is sleeved on the outer side of the annular reinforcing frame, the annular reinforcing frame plays a role in improving the structural strength of the end plate assembly, and the structure is simple; the annular reinforcing frame is formed by bending the reinforcing strip plate in an annular manner, and the processing mode is simple and the efficiency is high; the joint of the annular reinforcing frame is opposite to the flanging, so that the joint of the annular reinforcing frame is far away from the corner of the annular reinforcing frame, the tightness of the heat exchanger is improved, and the problem of smoke leakage is avoided; and the seam of the annular reinforcing frame is opposite to the flanging, and the flanging is utilized to seal the seam, so that the sealing performance of the heat exchanger is further improved.

Description

Heat exchanger and gas water heater

Technical Field

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

Background

The gas water heater is also called as gas water heater, which uses gas as fuel to transfer heat to cold water flowing through heat exchanger by combustion heating mode, so as to achieve the purpose of preparing hot water.

The heat exchanger of the gas water heater is a device for realizing heat exchange between high-temperature flue gas and water. In the related art, a heat exchanger includes a heat exchange pipe and a heat exchange case, and a portion of the heat exchange pipe located in the heat exchange case exchanges heat with high-temperature flue gas to prepare hot water. However, the conventional heat exchange shell has poor sealing performance and has the problem of smoke leakage.

Accordingly, there is a need in the art for a new heat exchanger and gas water heater that addresses the above-described problems.

Disclosure of Invention

In order to solve the problems in the prior art, namely, in order to solve the problems of poor tightness and smoke leakage of the existing heat exchange shell.

The present application provides a heat exchanger comprising:

the two end plate assemblies are arranged at intervals in the transverse direction, and a heat exchange space is formed between the two end plate assemblies;

the end plate assembly comprises an end plate and an annular reinforcing frame, the end plate comprises a plate body and a flanging, a through hole is formed in the plate body, and the edge of the through hole bends and extends towards the outer side of the heat exchange space to form a sealing ring; the flange is formed by bending the side edge of the plate body away from the heat exchange space; the flange is sleeved on the outer side of the annular reinforcing frame, the annular reinforcing frame is formed by annular bending of the reinforcing strip plate, and a seam of the annular reinforcing frame is opposite to the flange;

the heat exchange pipeline is at least partially positioned in the heat exchange space, the end part of the heat exchange pipeline passes through the through hole and the sealing ring to the outer side of the plate body, and the heat exchange pipeline is sealed by the sealing ring.

In an alternative technical scheme of the heat exchanger, the plate body is a rectangular plate, and the turnups are four; the seam of the annular reinforcing frame is opposite to the flanging at the top end.

In an alternative embodiment of the heat exchanger, the flange at the top end is symmetrical about a seam of the annular reinforcing frame.

In an optional technical scheme of the heat exchanger, the annular reinforcing frame is a rectangular ring, and four corners of the annular reinforcing frame face away from the flanging and are protruded to form reinforcing ribs.

In an alternative technical scheme of the heat exchanger, a plurality of connecting holes are formed in the annular reinforcing frame; the annular reinforcing frame comprises a top plate part, a bottom plate part and two side plate parts, wherein a plurality of connecting holes are respectively arranged on the two side plate parts at intervals along the vertical direction, a plurality of connecting holes are arranged on the bottom plate part at intervals along the longitudinal direction, and a plurality of connecting holes are arranged on the top plate part at intervals along the longitudinal direction; the longitudinal direction is perpendicular to the vertical direction; the seam of the annular reinforcing frame is positioned on the top plate part, and the seam of the annular reinforcing frame is positioned between the two connecting holes on the top plate part.

In an alternative aspect of the above heat exchanger, the plurality of connection holes in the top plate portion are symmetrical with respect to a seam of the annular reinforcing frame.

In an alternative embodiment of the heat exchanger, the bottom plate portion is bent away from the top plate portion to form a turning claw for abutting on the outside of the burner housing.

In an alternative embodiment of the heat exchanger, the end of the annular reinforcing frame facing away from the plate body protrudes beyond the end of the flange.

In the alternative technical scheme of the heat exchanger, the heat exchange pipeline and the end plate are both made of copper, and the annular reinforcing frame is made of stainless steel.

The gas water heater includes: the heat exchanger is arranged at the top of the burner, and the heat exchange space of the heat exchanger is communicated with the combustion space of the burner.

As can be appreciated by those skilled in the art, the heat exchanger of the gas water heater according to the embodiments of the present application includes two end plate assemblies and a heat exchange tube, where the two end plate assemblies are arranged at intervals in a lateral direction, and a heat exchange space is formed between the two end plate assemblies; the end plate assembly comprises an end plate and an annular reinforcing frame, the end plate comprises a plate body and a flanging, a through hole is formed in the plate body, and the edge of the through hole bends and extends towards the outer side of the heat exchange space to form a sealing ring; at least part of the heat exchange pipeline is positioned in the heat exchange space, the end part of the heat exchange pipeline passes through the through hole and the sealing ring to the outer side of the plate body, and the heat exchange pipeline is sealed through the sealing ring, so that the sealing performance is improved, a fixing structure and a sealing structure are not required to be additionally arranged, and the structure of the heat exchanger is simplified.

The flanging is formed by bending the side edges of the plate body away from the heat exchange space; the flanging is sleeved on the outer side of the annular reinforcing frame, the annular reinforcing frame plays a role in improving the structural strength of the end plate assembly, and the structure is simple; the annular reinforcing frame of this application embodiment uses little material, does benefit to reduce cost. The annular reinforcing frame is formed by bending the reinforcing strip plate in an annular manner, and the processing mode is simple and the efficiency is high; the joint of the annular reinforcing frame is opposite to the flanging, so that the joint of the annular reinforcing frame is far away from the corner of the annular reinforcing frame, the tightness of the heat exchanger is improved, and the problem of smoke leakage is avoided; and the seam of the annular reinforcing frame is opposite to the flanging, and the flanging is utilized to seal the seam, so that the sealing performance of the heat exchanger is further improved.

Drawings

Alternative implementations of the heat exchanger and gas water heater of the embodiments of the present application are described below with reference to the accompanying drawings. The attached drawings are as follows:

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

FIG. 2 is an exploded view of a combustor and heat exchanger of an embodiment of the present application;

FIG. 3 is a schematic view of a heat exchanger provided in an embodiment of the present application;

FIG. 4 is an exploded view of a heat exchanger provided in an embodiment of the present application;

FIG. 5 is a schematic structural view of an end plate assembly of a heat exchanger provided in an embodiment of the present application;

FIG. 6 is an enlarged schematic view of region P of FIG. 5;

FIG. 7 is a schematic view of the structure of the reinforcing lath in the embodiment of the present application;

FIG. 8 is a schematic view of the structure of an annular reinforcing frame of a heat exchanger provided in an embodiment of the present application;

fig. 9 is a schematic structural view of an end plate of a heat exchanger provided in an embodiment of the present application.

In the accompanying drawings: 100: a heat exchanger; 101: an end plate assembly; 102: a heat exchange space; 110: a heat exchange pipeline; 111: a straight pipe section; 112: a U-shaped pipe section; 113: a U-shaped connecting pipe; 114: a water inlet pipe section; 115: a water outlet pipe section; 120: an end plate; 121: a via hole; 122: a seal ring; 123: a plate body; 1231: convex hulls; 124: flanging; 1241: an avoidance opening; 130: an annular reinforcing frame; 1301: reinforcing laths; 1301a, 1301b, 1301c, 1301d: bending parts; 131: a joint; 132: reinforcing the convex ribs; 133: a connection hole; 134: a top plate portion; 135: a bottom plate portion; 136: a side plate portion; 137: turning the claw; 140: a fume collecting hood; 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 bottom plate; 240: a first U-shaped gasket; 300: discharging fire; 410: a front wall panel; 420: a rear wall panel; 430: a first sidewall plate; 440: a second sidewall plate; 450: a combustion frame; 500: an outer housing; 510: a first half shell; 520: a second half shell; 600: a blower; 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 for explaining the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adapt it as desired to suit a particular application.

Further, it should be noted that, in the description of the embodiments of the present application, terms such as directions or positional relationships indicated by the terms "inner", "outer", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or the member must have a specific orientation, be configured 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 specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two components. The specific meaning of the above terms in the embodiments of the present application will be understood by those skilled in the art according to the specific circumstances.

The heat exchanger of the gas water heater is a device for realizing heat exchange between high-temperature flue gas and water. In the related art, a heat exchanger includes a heat exchange pipe and a heat exchange case, and a portion of the heat exchange pipe located in the heat exchange case exchanges heat with high-temperature flue gas to prepare hot water. However, research and development personnel find that the existing heat exchange shell has poor sealing performance and has the problem of smoke leakage.

Research and development personnel find that the end plate assembly of the heat exchange shell generally comprises an inner layer plate and an outer layer plate, and in order to achieve installation, flanges are generally arranged on the periphery of the outer layer plate, gaps exist between two adjacent flanges, and smoke leakage is easy to occur.

Researchers consider welding the gaps of two adjacent flanges together to improve the tightness. However, adding one welding process not only affects the production efficiency, but also results in an increase in cost.

Research and development personnel continue to study, and an annular reinforcing frame is provided, wherein the annular reinforcing frame is formed by bending reinforcing strips, and the corners of the annular reinforcing frame are seamless, so that the problem of smoke leakage is avoided; the seam sets up in the top of end plate, utilizes the turn-ups of end plate to seal, guarantees sealing performance.

The following describes alternative technical schemes of the heat exchanger and the gas water heater according to the embodiments of the present application with reference to the accompanying drawings.

First, in the embodiment of the present application, the term "front" refers to a side of the gas water heater facing the user, and the term "bottom" refers to a side facing the ground. The "longitudinal" corresponds to the Y-axis in the drawing, the "transverse" corresponds to the X-axis in the drawing, and the vertical corresponds to the Z-axis in the drawing.

Fig. 1 is an exploded view of a gas water heater provided in an embodiment of the present application. Note that, the water inlet pipe of the heat exchanger 100 in fig. 1 is not illustrated.

The gas water heater of this embodiment, including combustor and heat exchanger 100, heat exchanger 100 installs at the top of combustor, and the heat transfer space of heat exchanger 100 communicates with the combustion space of combustor, and the high temperature flue gas that so the combustor burning produced can get into in the heat exchanger 100 to make heat exchanger 100 and high temperature flue gas carry out the heat exchange, realize the purpose of preparing hot water.

The gas water heater of the present embodiment further includes an outer case 500 and a fan 600. The fan 600 is installed in the bottom of combustor, and fan 600 communicates with the air inlet chamber of combustor. The fan 600 sucks air into the air inlet cavity, one part of the air enters the burner for combustion of fuel gas, and the other part of the air enters the air duct of the burner to perform a cooling function.

The outer case 500 provides an installation space for the burner, the heat exchanger 100, the fan 600, and the like. An air inlet is provided at the rear of the outer case 500, and external air enters the inside of the outer case 500 through the air inlet under the action of the blower 600 and enters the inside of the burner through the blower 600.

For example, the outer case 500 may be a rectangular case, and the outer case 500 includes a first half case 510 and a second half case 520, wherein the first half case 510 is a U-shaped plate case opened backward, and the first half case 510 includes a front side plate portion, a left side plate portion, and a right side plate portion disposed at left and right sides of the front side plate portion at opposite intervals. The first half shell 510 is a single piece, facilitating assembly of the outer shell 500. The second half shell 520 comprises a rear side plate part, a top end plate part and a bottom end plate part which are fixedly connected, wherein the top end plate part and the bottom end plate part are respectively fixed at the top end and the bottom end of the rear side plate part, the top end plate part is fixedly connected with the top end of the first half shell 510, the bottom end plate part is fixedly connected with the bottom end of the first half shell 510, and the left side and the right side of the rear side plate part are respectively fixedly connected with the left side plate part and the right side plate part. The plate portions of the outer case 500 may be connected by screws, rivets, or the like, which is not limited in the embodiment of the present application.

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

Referring to fig. 1 and 2, the burner according to the embodiment of the present application includes a burner outer case 200 and a burner inner case located in the burner outer case 200, in which a fire row 300 is installed, and the fire row 300 is provided in plurality, and a plurality of flames can be simultaneously formed.

The burner housing 200 of the present embodiment includes a front side plate 210, a rear side plate 220, and a U-shaped plate 230, with the front side plate 210 and the rear side plate 220 being disposed at opposite intervals. The rear side of the U-shaped plate 230 is riveted with the rear side plate 220, the front side of the U-shaped plate 230 is screw-coupled with 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 to seal the burner housing 200. The riveting of the rear side plate 220 and the U-shaped plate 230 in the embodiment of the application not only can improve the assembly efficiency, but also can provide initial positioning for the threaded connection of the front side plate 210 and the U-shaped plate 230, and is convenient for screwing in a screw; the front side plate 210 is screwed with the U-shaped plate 230, which is advantageous in ensuring structural stability and reliability of the burner housing 200.

The U-shaped plate 230 is substantially U-shaped, and the U-shaped plate 230 is an integral piece, so that the assembly process of the burner housing 200 is reduced, the assembly efficiency is improved, and the risk of smoke leakage is reduced. The U-shaped plate 230 includes an integrally formed bottom plate 233, a first side plate 231 and a second side plate 232, where the first side plate 231 and the second side plate 232 are disposed at two ends of the bottom plate 233 at opposite intervals, and top ends of the first side plate 231 and the second side plate 232 can be flush.

The rear side plate 220 and the front side plate 210 protrude from the first side plate 231 and the second side plate 232, and a space for mounting the heat exchanger 100 is formed between a portion of the front side plate 210 protruding from the first side plate 231 and a portion of the rear side plate 220 protruding from the first side plate 231. In this way, the front side plate 210 and the rear side plate 220 are both used as the side walls of the combustion space and the heat exchange space, so that the high-temperature flue gas generated by the combustion of the burner can smoothly enter the heat exchanger 100, and the heat exchanger 100 exchanges heat.

With continued reference to FIG. 2, the combustor of the embodiments of the present application further includes a combustion frame 450, the combustion frame 450 and the combustor inner casing forming a combustion space. The burner housing 450 is fixed to the inner side of the burner housing 200 for mounting the fire row 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 being disposed in a spaced relation, the first side wall plate 430 being located on the left side of the front wall plate 410 and the rear wall plate 420, and the second side wall plate 440 being located on the 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 with 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 with the first side wall plate 430 and the second side wall plate 440, so that the arrangement can ensure the interval between the first side wall plate 430 and the second side wall plate 440, ensure the sufficient combustion space of the fire grate 300 and avoid serious thermal deformation of the wall plates; deformation space can also be reserved for contraction of each wall plate.

The front wall plate 410 and the front side plate 210 have a gap therebetween, the rear wall plate 420 and the rear side plate 220 have a gap therebetween, the first side wall plate 430 and the first side plate 231 have a gap therebetween, the second side wall plate 440 and the second side plate 232 have a gap therebetween, and the four gaps can allow outside air to enter, thereby serving to reduce the temperature of the inner and outer burner shells 200.

FIG. 3 is a schematic view of a heat exchanger provided in an embodiment of the present application; FIG. 4 is an exploded view of a heat exchanger provided in an embodiment of the present application; FIG. 5 is a schematic structural view of an end plate assembly of a heat exchanger provided in an embodiment of the present application; fig. 6 is an enlarged schematic view of the region P in fig. 5.

Referring to fig. 3 to 5, a heat exchanger according to an embodiment of the present application includes: two end plate assemblies 101, heat exchange tubes 110 and fins.

The two end plate assemblies 101 are arranged at intervals along the transverse direction (corresponding to the X-axis direction in the figure), a heat exchange space 102 is formed between the two end plate assemblies 101, and a heat exchange pipeline 110 part in the heat exchange space 102 is used for exchanging air with high-temperature flue gas, so that the purpose of heating water is achieved.

The end plate assembly 101 comprises an end plate 120 and an annular reinforcing frame 130, wherein the end plate 120 comprises a plate body 123 and a flanging 124, a through hole 121 is formed in the plate body 123, and the edge of the through hole 121 is bent and extended towards the outer side of the heat exchange space 102 to form a sealing ring 122. The shape of the seal ring 122 is identical to the shape of the via 121, and the inner diameter of the seal ring 122 is identical to the diameter of the via 121.

The heat exchange tube 110 is generally circular in cross-section, and in this case, the heat exchange tube 110 is a circular tube. Accordingly, the via 121 is a circular hole. However, this is not a limitation on the shape of the via hole 121, and the cross-sectional shape of the via hole 121 may be identical to the cross-sectional shape of the heat exchange tube 110, for example, when the cross-section of the heat exchange tube 110 is elliptical, the cross-section of the via hole 121 is elliptical. The "cross section" referred to herein means a section formed by cutting the heat exchange tube 110 in the YZ plane.

With continued reference to fig. 4, two ends of the heat exchange tube 110 in the embodiment of the present application form a water inlet and a water outlet, respectively, the water inlet is used for communicating with a water inlet tube, and the water outlet is used for communicating with a water outlet tube. In this embodiment, the heat exchange tube 110 includes a plurality of U-shaped main tubes, at least one U-shaped connecting tube 113, a water inlet tube 114 and a water outlet tube 115, where the U-shaped main tube includes two straight tube sections 111 and a U-shaped tube section 112, the two straight tube sections 111 all extend along a transverse direction, first ends of the two straight tube sections 111 are respectively communicated with two ends of the U-shaped tube section 112, and the two straight tube sections 111 and the U-shaped tube section 112 form an integral U-shaped main tube.

The plurality of U-shaped main pipes are arranged at intervals in the longitudinal direction, and the opening directions of the U-shaped main pipes are all toward the same side, such as the positive direction side of the X axis in the drawing. The second end of the straight pipe section 111 at the foremost end in the plurality of U-shaped main pipes, namely the second end of the straight pipe section 111 at one end in the negative direction of the Y-axis in the drawing, is communicated with the water inlet pipe section 114, and the water inlet pipe section 114 forms a water inlet of the heat exchange pipeline 110; the second end of the straight pipe section 111 at the rearmost end of the plurality of U-shaped main pipes, namely the second end of the straight pipe section 111 at one end in the positive direction of the Y-axis in the drawing, is communicated with the water outlet pipe section 115, and the water outlet pipe section 115 forms a water outlet of the heat exchange pipeline 110. For the plurality of straight pipe sections 111 between the water inlet pipe section 114 and the water outlet pipe section 115, each adjacent two of the straight pipe sections 111 are communicated by one U-shaped connecting pipe 113. The S-shaped heat exchange pipeline 110 is arranged in this way, which is beneficial to improving the heat exchange speed and the heat exchange efficiency.

The heat exchange pipeline 110 comprises N U-shaped main pipes, N is an integer greater than or equal to 2, and then 2N straight pipe sections 111 are formed, wherein the second ends of the two straight pipe sections 111 are respectively communicated with a water inlet pipe section 114 and a water outlet pipe section 115, and the remaining 2N-2 straight pipe sections are communicated through N-1U-shaped connecting pipes 113 to form the S-shaped heat exchange pipeline 110. In the heat exchange tube 110 shown in fig. 4, two U-shaped main tubes are provided, and four straight tube sections 111 in total, and one U-shaped connecting tube 113 is provided.

At least a portion of the heat exchange conduit 110 is positioned within the heat exchange space 102 to exchange heat with the high temperature flue gas. In the embodiment of the present application, the straight tube section 111 of the heat exchange tube 110 is partially located in the heat exchange space 102, so that the straight tube section 111 is convenient to be matched with and installed on the end plate assembly 101. The water inlet pipe section 114 forming the water inlet of the heat exchange pipe 110 and the water outlet pipe section 115 forming the water outlet are positioned at the outer side of the heat exchange space 102, and conveniently connected with the water inlet pipe and the water outlet pipe, thereby introducing cold water and discharging hot water. The inlet pipe section 114 and the outlet pipe section 115 are positioned on the same side of the heat exchanger, facilitating the arrangement of the pipes.

The end of the heat exchange tube 110 passes through the through hole 121 and the sealing ring 122 to the outside of the plate body 123, and the heat exchange tube 110 is sealed with the sealing ring 122. The heat exchange pipeline 110 is made of the same material as the inner end plate 120, for example, the heat exchange pipeline 110 is a copper pipe, the inner end plate 120 is a copper plate, the copper pipe is good in heat transfer, the heat exchange efficiency is improved, and the copper plate has certain ductility, so that the sealing effect is improved.

It will be appreciated that the heat exchange tube 110, which is adapted to the S-shape, is provided with a plurality of through holes 121, and the plurality of holes 121 are arranged at intervals in the longitudinal direction.

The heat exchange pipeline 110 of this application embodiment can utilize the tight technology of expansion to make heat exchange pipeline 110 swell and warp, extrudees sealing ring 122 and via hole 121 pore wall for sealing ring 122 is sealed with heat exchange pipeline 110 interference connection, need not additionally to set up fixed knot and seal structure, does benefit to the structure of simplifying heat exchanger 100, does benefit to the packaging efficiency that improves heat exchanger 100. And the heat exchange pipeline 110 and the end plate 120 are made of the same material and have the same deformability, so that gaps between the heat exchange pipeline 110 and the sealing ring 122 due to different deformation are avoided, and the tightness of the connection between the end plate assembly 101 and the heat exchange pipeline 110 is improved.

In the embodiment of the application, the flange 124 is formed by bending the side edges of the plate body 123 away from the heat exchanging space 102; the flange 124 is perpendicular to the plate body 123. In some possible embodiments, the plate body 123 is a rectangular plate, and four sides of the plate body 123 respectively bend away from the heat exchange space 102 to form four flanges 124. Of course, this is not a limitation on the shape of the plate body 123, for example, the plate body 123 may also be circular, in which case the flange 124 is a circular flange; for another example, the plate body 123 may be elliptical, in which case the flange 124 is an elliptical flange.

The flange 124 of the embodiment of the present application is sleeved on the outer side of the annular reinforcing frame 130. The shape of the annular reinforcing frame 130 is the same as the shape surrounded by the plurality of flanges 124. For example, when the four flanges 124 are enclosed to form a rectangle, the annular reinforcing frame 130 is a rectangular frame.

Illustratively, the annular reinforcing frame 130 is made of stainless steel, so that the strength is high, the structural strength of the end plate assembly 101 is improved, and the stability of connection with the end plate assembly 101 and other structures is ensured.

Referring to fig. 7, fig. 7 is a schematic structural view of the reinforcing strip in the embodiment of the present application. The annular reinforcing frame 130 of the embodiment of the present application is formed by annular bending of the reinforcing strip 1301, and the seam 131 of the annular reinforcing frame 130 is opposite to the flange 124. Thus, the bending part of the annular reinforcing frame 130 is seamless, which is beneficial to improving the tightness of the heat exchanger and avoiding the problem of smoke leakage.

The seam 131 of the annular reinforcing frame 130 may be opposite the top turn 124, the seam 131 of the annular reinforcing frame 130 may be opposite the bottom turn 124, the seam 131 of the annular reinforcing frame 130 may be opposite the left turn 124, and the seam 131 of the annular reinforcing frame 130 may be opposite the right turn 124. The seam 131 of the annular reinforcing frame 130 is opposite to the flange 124, and the flange 124 seals the seam 131, so that the sealing performance of the heat exchanger is improved.

Optionally, the annular reinforcing frame 130 is welded at the seam 131, which can both close the seam 131 and improve the structural strength of the annular reinforcing frame 130.

In some possible implementations, the seam 131 of the annular reinforcing frame 130 is opposite to the flange 124 of the top end, so that the installation is convenient; the top flange 124 is symmetrical about the seam 131 of the annular reinforcing frame 130 such that the seam 131 is centered on the top flange 124. So set up for annular reinforcing frame 130 is symmetrical about seam 131, does benefit to the convenience that improves annular reinforcing frame 130 processing, utilizes a set of bending die to realize annular reinforcing frame 130's processing in two end plate assemblies 101, does benefit to the commonality that improves bending die, does benefit to reduce cost.

Fig. 8 is a schematic structural view of an annular reinforcing frame of a heat exchanger according to an embodiment of the present application. Referring to fig. 8, the annular reinforcing frame 130 is a rectangular ring, and four corners of the annular reinforcing frame 130 protrude away from the flange 124 to form reinforcing ribs 132, which is beneficial to improving the structural strength and stability of the annular reinforcing frame 130.

With continued reference to fig. 8, the annular reinforcing frame 130 is provided with a plurality of connection holes 133 for fixedly connecting the end plate assembly 101 to other structures.

The plurality of connection holes 133 may be disposed at intervals in the annular direction of the annular reinforcing frame 130. In the embodiment of the present application, the annular reinforcing frame 130 is a rectangular frame, and the annular reinforcing frame 130 includes a top plate portion 134, a bottom plate portion 135, and two side plate portions 136, where the two side plate portions 136 are parallel and extend along the Z-axis direction; the top plate portion 134 and the bottom plate portion 135 are opposed and parallel. The top plate 134 is perpendicular to the side plate 136. One corner is formed between both ends of the top plate portion 134 and the two side plate portions 136, and one corner is formed between both ends of the bottom plate portion 135 and the two side plate portions 136.

The two side plate portions 136 are respectively provided with a plurality of connection holes 133 at intervals in the vertical direction (corresponding to the Z-axis direction in fig. 8), for example, the two side plate portions 136 are respectively provided with three connection holes 133 at intervals in the Z-axis direction; the bottom plate portion 135 is provided with a plurality of connection holes 133 at intervals in the longitudinal direction (corresponding to the Y-axis direction in fig. 8), for example, the bottom plate portion 135 is provided with three connection holes 133 at intervals in the Y-axis direction, respectively; the top plate 134 is provided with a plurality of connection holes 133 at intervals in the longitudinal direction (corresponding to the Y-axis direction in fig. 8), for example, the top plate 134 is provided with two connection holes 133 at intervals in the Y-axis direction, respectively.

The seam 131 of the annular reinforcing frame 130 is located at the top panel 134, and the top panel 134 is symmetrical about the seam 131. The joint 131 of the annular reinforcing frame 130 is located between the two connecting holes 133 on the top plate 134, so that the connecting holes 133 can be avoided, on the one hand, the connecting holes 133 are convenient to arrange, and on the other hand, the tightness of the heat exchanger is prevented from being affected.

In some embodiments, the plurality of connecting holes 133 on the top plate 134 are symmetrical with respect to the seam 131 of the annular reinforcing frame 130, so that two sides of the seam 131 are uniformly fixed, and the stress is uniform, so as to avoid the deformation of the top plate 134 to cause the seam 131 to be enlarged, thereby affecting the tightness of the heat exchanger.

With continued reference to fig. 8, in the embodiment of the present application, the bottom plate 135 is bent away from the top plate 134 to form a turning claw 137, where the turning claw 137 is used to resist the outer side of the burner housing, and plays a role of limiting.

To facilitate the processing and manufacturing of the annular reinforcing frame 130, the turnover claws 137 are provided in two and symmetrical with respect to the joint 131.

The following describes the manufacturing process of the annular reinforcing frame 130 according to the embodiment of the present application with reference to fig. 7. A plurality of connecting holes 133 and turning claws 137 are first machined in the reinforcing slat 1301 shown in fig. 7; and bending process treatment is performed at four bending positions of the bending position 1301a, the bending position 1301b, the bending position 1301c and the bending position 1301d on the reinforcing slat 1301, so as to form the annular reinforcing frame 130.

Four bends form four corners of the annular reinforcing frame 130, respectively. A partial reinforcing strip 1301 between the bent portion 1301a and the bent portion 1301b, a partial reinforcing strip 1301 between the bent portion 1301c and the bent portion 1301d, respectively forming two side plate portions 136 of the annular reinforcing frame 130; the part of the reinforcing strip 1301 between the bend 1301b and the bend 1301c forms the bottom plate portion 135 of the annular reinforcing frame 130, and the remaining two parts of the reinforcing strip 1301 form the top plate portion 134 of the annular reinforcing frame 130. The embodiment of the application sets up so and strengthens slat 1301, can do benefit to the annular reinforcing frame 130 that a set of mould of bending can process two end plate assembly 101, does benefit to the commonality that improves the mould of bending, does benefit to reduction in production cost.

Referring to fig. 5 and 6, in the embodiment of the present application, the end of the annular reinforcing frame 130 facing away from the plate body 123 protrudes from the end of the flange 124, so as to ensure that the flange 124 is supported by the annular reinforcing frame 130; and when the end plate 120 is made of copper, the flange 124 has a certain ductility, so that the flange 124 can be stably supported, and the structural stability of the heat exchanger is guaranteed.

The structure of the end plate 120 according to the embodiment of the present application is further described below with reference to fig. 9. Fig. 9 is a schematic structural view of an end plate of a heat exchanger according to an embodiment of the present application.

As shown in fig. 9, the four flanges 124 of the end plate 120 are provided with avoidance openings 1241 in decibels to avoid the connection holes 133, so that the connection holes 133 are convenient to be fixedly connected with other structures.

The fins of the present embodiment are mounted on the heat exchange pipe 110 to improve heat exchange efficiency. The fins are provided in plurality and are arranged on the straight tube sections 111 of the heat exchange tube 110 in the X-axis direction. According to the embodiment of the application, the plurality of fins are arranged, so that the heat exchange efficiency is further improved. In this embodiment of the present application, the fins are provided with through holes through which the straight tube sections 111 pass, and the fins are fixed on the straight tube sections 111 of the heat exchange tube 110 by an expanding process, and specifically, a sphere with a diameter greater than the inner diameter of the heat exchange tube 110 can be utilized to move from one end of the heat exchange tube 110 towards the other end, and the heat exchange tube 110 is extruded to be thickened, so that the fins are in interference connection with the heat exchange tube 110. Meanwhile, the heat exchange pipeline 110 can be further made to extrude the sealing ring 122, so that interference connection between the heat exchange pipeline section 110 and the sealing ring 122 is realized, and the sealing ring 122 is extruded, so that the sealing ring 122 and the straight pipe section 111 are sealed.

In order to avoid the fin at both ends from affecting the heat exchange efficiency due to the adhesion of the end plate 120, the plate body 123 of the end plate 120 in the embodiment of the present application protrudes toward the heat exchange space 102 to form a plurality of convex hulls 1231, where the convex hulls 1231 may be circular convex hulls, oblong convex hulls, elliptical convex hulls, and the like. The plurality of convex hulls 1231 may be arranged on the end plate 120 in various ways, for example, the plurality of convex hulls 1231 are arranged at intervals along the longitudinal direction (corresponding to the Y axis), and for example, the plurality of convex hulls 1231 are arranged in a rectangular matrix on the end plate 120. In the embodiment of the present application, a plurality of convex hulls 1231 are arranged at intervals along the longitudinal direction (corresponding to the Y axis), and one via 121 is disposed between two adjacent convex hulls 1231.

The partial convex hulls 1231 are located at the top ends of the through holes 121, for example, a convex hull 1231 is respectively disposed at the top end of each through hole 121, so that a larger contact area is ensured, and gaps between the end plates 120 and the fins are ensured, so that high-temperature flue gas can pass through, and the heat exchange efficiency is prevented from being influenced by the fact that the fins of the heat exchanger 100 are closely attached to the plate body 123.

The convex hull 1231 provided on the end plate 120 in the embodiment of the present application may also serve to improve the structural strength of the end plate 120.

Referring again to fig. 2 and 3, the heat exchange housing of the heat exchanger of the present embodiment includes, in addition to the two end plate assemblies 101 described above, a partial front side plate 210 protruding from the first side plate 231 and a partial rear side plate 220 protruding from the first side plate 231; the smoke collecting hood 140 is arranged at the top end, and a smoke exhaust pipeline is arranged on the smoke collecting hood 140 and used for exhausting smoke.

The left end and the right end (i.e. the two ends along the X-axis direction in fig. 2) of the fume collecting hood 140 are respectively in threaded connection with the top plate parts 134 at the top ends of the two end plate assemblies 101, and a sealing gasket is arranged between the fume collecting hood 140 and the top plate parts 134; the rear end of the fume collecting hood 140 (i.e., one end along the negative Y-axis direction in fig. 2) is screw-coupled with the rear side plate 220 and provided with a gasket; the second U-shaped gaskets 710 are provided at both left and right ends and rear ends of the fume collecting hood 140 to seal between the fume collecting hood 140 and the top plate 134 and the rear side plate 220 of the top. The front end of the fume collecting hood 140 (i.e., one end along the positive direction of the Y-axis in fig. 2) is screw-coupled with the front side plate 210, and a third gasket 740 is provided between the front end of the fume collecting hood 140 and the front side plate 210. Thus, the fume collection hood 140 is sealingly connected to the end plate assembly 101 and the burner housing 200.

With respect to between the end plate assembly 101 and the burner housing 200, the bottom plate portion 135 of the end plate assembly 101 is screwed with the first side plate 231 and the second side plate 232, respectively, and is provided with a first seal 720; the side plate portion 136 at the rear end (i.e., one end in the negative Y-axis direction in fig. 2) of the end plate assembly 101 is screwed to the rear side plate 220, and is provided with a second gasket 730; the side plate portion 136 of the front end (i.e., the end in the Y-axis positive direction in fig. 2) of the end plate assembly 101 is screwed with the front side plate 210, and the first U-shaped packing 240 extends between the first fixing flange 133 and the front side plate 210.

Thus, the fume collecting hood 140, the heat exchanger 100 and the burner housing 200 enclose a heat exchanging space 102 and a combustion space which are closed and communicated, and fume leakage is avoided.

In the present embodiment, with continued reference to fig. 2, a front wall panel 410 is sandwiched between the front side panel 210 and the U-shaped panel 230; the top end of the rear wall plate 420 is arranged on the rear side plate 220, and the rear wall plate 420 is clamped and fixed between the rear side plate 220 and the rear end of the smoke collecting cover 140; the top end of the first side wall plate 430 is hung on the top end of the first side plate 231, and the top end of the first side wall plate 430 is clamped between the bottom plate portion 135 and the first side plate 231; the top end of the second side wall plate 440 is hung on the top end of the second side plate 232, and the top end of the first side wall plate 430 is sandwiched between the bottom plate 135 and the second side plate 232. The inner shell of the burner is arranged without arranging a fixing structure additionally, so that the structure is simplified, and the assembly efficiency of the gas water heater is improved; and, the relative swing joint between each wallboard of combustor inner shell reserves the deformation space for the thermal deformation.

In summary, the heat exchanger of the gas water heater according to the embodiment of the present application includes two end plate assemblies 101 and a heat exchange tube 110, the two end plate assemblies 101 are arranged at intervals in the lateral direction, and a heat exchange space 102 is formed between the two end plate assemblies 101; the end plate assembly 101 comprises an end plate 120 and an annular reinforcing frame 130, wherein the end plate 120 comprises a plate body 123 and a flanging 124, a through hole 121 is formed in the plate body 123, and the edge of the through hole 121 is bent and extended towards the outer side of the heat exchange space 102 to form a sealing ring 122; at least part of the heat exchange pipeline 110 is positioned in the heat exchange space 102, the end part of the heat exchange pipeline 110 passes through the through hole 121 and the sealing ring 122 to the outer side of the plate body 123, and the heat exchange pipeline 110 is sealed by the sealing ring 122, so that the sealing performance is improved, a fixing structure and a sealing structure are not required to be additionally arranged, and the structure of the heat exchanger is simplified.

The flange 124 in the embodiment of the present application is formed by bending the side edge of the plate body 123 away from the heat exchange space 102; the flange 124 is sleeved on the outer side of the annular reinforcing frame 130, and the annular reinforcing frame 130 plays a role in improving the structural strength of the end plate assembly 101, and is simple in structure; the annular reinforcing frame 130 of the embodiment of the application is less in material consumption and beneficial to cost reduction. The annular reinforcing frame 130 is formed by bending the reinforcing strip plate 1301 in an annular manner, and the processing mode is simple and the efficiency is high; the seam 131 of the annular reinforcing frame 130 is opposite to the flanging 124, so that the seam of the annular reinforcing frame 130 is far away from the corner of the annular reinforcing frame 130, which is beneficial to improving the tightness of the heat exchanger and avoiding the problem of smoke leakage; and the seam 131 of the annular reinforcing frame 130 is opposite to the flange 124, and the flange 124 is utilized to seal the seam 131, so that the sealing performance of the heat exchanger is further improved.

Thus far, the technical solution of the present application has 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 protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will be within the scope of the present application.

Claims (10)

1. A heat exchanger, comprising:

the two end plate assemblies are arranged at intervals in the transverse direction, and a heat exchange space is formed between the two end plate assemblies;

the end plate assembly comprises an end plate and an annular reinforcing frame, the end plate comprises a plate body and a flanging, a through hole is formed in the plate body, and the edge of the through hole bends and extends towards the outer side of the heat exchange space to form a sealing ring; the flange is formed by bending the side edge of the plate body away from the heat exchange space; the flange is sleeved on the outer side of the annular reinforcing frame, the annular reinforcing frame is formed by annular bending of the reinforcing strip plate, and a seam of the annular reinforcing frame is opposite to the flange;

the heat exchange pipeline is at least partially positioned in the heat exchange space, the end part of the heat exchange pipeline passes through the through hole and the sealing ring to the outer side of the plate body, and the heat exchange pipeline is sealed by the sealing ring.

2. The heat exchanger of claim 1, wherein the plate body is a rectangular plate and the flange has four flanges;

the seam of the annular reinforcing frame is opposite to the flanging at the top end.

3. The heat exchanger of claim 2, wherein the flange at the top end is symmetrical about a seam of the annular reinforcing frame.

4. The heat exchanger of claim 1, wherein the annular reinforcing frame is a rectangular ring, and four corners of the annular reinforcing frame protrude away from the flange to form a reinforcing bead.

5. The heat exchanger of claim 4, wherein the annular reinforcing frame is provided with a plurality of connection holes;

the annular reinforcing frame comprises a top plate part, a bottom plate part and two side plate parts, wherein a plurality of connecting holes are respectively arranged on the two side plate parts at intervals along the vertical direction, a plurality of connecting holes are arranged on the bottom plate part at intervals along the longitudinal direction, and a plurality of connecting holes are arranged on the top plate part at intervals along the longitudinal direction; the longitudinal direction is perpendicular to the vertical direction;

the seam of the annular reinforcing frame is positioned on the top plate part, and the seam of the annular reinforcing frame is positioned between the two connecting holes on the top plate part.

6. The heat exchanger of claim 5, wherein the plurality of connection holes in the top plate portion are symmetrical about a seam of the annular reinforcing frame.

7. The heat exchanger of claim 5, wherein a portion of the bottom plate portion facing away from one end of the plate body is bent away from the top plate portion to form a turning claw for withstanding an outside of the burner housing.

8. The heat exchanger according to any one of claims 1 to 7, wherein an end of the annular reinforcing frame facing away from the plate body protrudes beyond an end of the flange.

9. The heat exchanger of any one of claims 1 to 7, wherein the heat exchange tubes and the end plates are each made of copper, and the annular reinforcing frame is made of stainless steel.

10. A gas water heater, comprising: a burner and a heat exchanger according to any one of claims 1-9, said heat exchanger being mounted on top of said burner, the heat exchanging space of said heat exchanger being in communication with the combustion space of said burner.