Heat exchanger and water heater

Abstract

The utility model discloses a heat exchanger and a water heater, and relates to the technical field of water heaters, the heat exchanger comprises a main heat exchange assembly, a second heat exchange assembly and a third heat exchange assembly, the main heat exchange assembly comprises a first heat exchange pipeline; the condensation heat exchange assembly and the main heat exchange assembly are oppositely arranged, the condensation heat exchange assembly comprises a second heat exchange pipeline, and the water outlet end of the second heat exchange pipeline is welded and communicated with the water inlet end of the first heat exchange pipeline; according to the heat exchanger, the main heat exchange assembly and the condensation heat exchange assembly are assembled in an integrated mode and connected through the pipelines in a welding mode, arrangement of the main heat exchange assembly and the condensation heat exchange assembly is more compact, and when the heat exchanger is assembled and used subsequently, the heat exchange efficiency is improved. The main heat exchange assembly and the condensation heat exchange assembly do not need to be assembled and connected through a long pipeline connecting piece, and the assembly process of the main heat exchange assembly and the condensation heat exchange assembly can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a heat exchanger and a water heater. Background Art

[0002] When designing a gas water heater, in order to improve the thermal utilization rate of the gas water heater, a two-stage heat exchange method can be used. A primary heat exchanger and a secondary heat exchanger are arranged in sequence on the flue gas flow path, and the flue gas can exchange heat with the primary heat exchanger and the secondary heat exchanger in sequence to fully utilize the latent heat of vaporization of the flue gas and improve the energy efficiency of the water heater. In traditional technology, the primary heat exchanger and the secondary heat exchanger of the water heater are split designs, and a long pipe connector is required for assembly and connection between the two, which has a complex assembly structure and low assembly efficiency. Utility Model Content

[0003] The main purpose of the utility model is to provide a heat exchanger and a water heater, aiming to simplify the overall assembly process of the heat exchanger with a two-stage heat exchange function and reduce the manufacturing cost.

[0004] To achieve the above-mentioned purpose, the heat exchanger proposed by the utility model comprises:

[0005] a main heat exchange assembly, the main heat exchange assembly comprising a first heat exchange pipeline; and

[0006] The condensing heat exchange component is arranged opposite to the main heat exchange component, and the condensing heat exchange component includes a second heat exchange pipeline, and the water outlet end of the second heat exchange pipeline is welded and connected to the water inlet end of the first heat exchange pipeline.

[0007] In one embodiment, the heat exchanger further comprises a first end plate and a second end plate, wherein the first end plate is located on one side of the main heat exchange component, and the second end plate is located on the other side of the main heat exchange component;

[0008] A first connection portion is provided at the water inlet end of the first heat exchange pipeline, a second connection portion is provided at the water outlet end of the second heat exchange pipeline, and the first connection portion is welded to the second connection portion.

[0009] In one embodiment, an arc-shaped notch is formed at an edge of the first end plate, and when the water outlet end of the second heat exchange pipeline is welded to the water inlet end of the first heat exchange pipeline, the first connection part or the second connection part is positioned at the arc-shaped notch.

[0010] In one embodiment, a support portion extending toward a side away from the second end plate is provided at an edge of the arc-shaped notch, and the first connecting portion or the second connecting portion abuts against an inner side wall of the support portion.

[0011] In one embodiment, a reinforcement portion extending toward a side away from the second end plate is provided on the outer periphery of the first end plate, a clearance groove is provided at a position opposite to the support portion, and a projection of the clearance groove in a direction toward the arc-shaped notch at least completely covers the support portion.

[0012] In one embodiment, the second connection part has an insertion port, the first connection part is inserted into the second connection part through the insertion port, and the outer periphery of the first connection part abuts against the inner wall of the second connection part.

[0013] In one embodiment, a convex edge is provided on the outer periphery of the first connection part, and the convex edge is located on a side of the plug port away from the second connection part, and a welding position for welding the first connection part and the second connection part is formed between the convex edge and the plug port.

[0014] In one embodiment, the first heat exchange pipeline includes a plurality of first heat exchange tubes connected in series, and the first heat exchange tubes are copper tubes; the second heat exchange pipeline includes a plurality of second heat exchange tubes connected in series, and the second heat exchange tubes are stainless steel tubes.

[0015] In one embodiment, the water outlet end of the first heat exchange pipeline is provided with a water outlet, and the water inlet end of the second heat exchange pipeline is provided with a water inlet;

[0016] The second end plate has a positioning portion, the positioning portion is penetrated by a positioning hole, and the water outlet is inserted into the positioning hole to position the condensing heat exchange component on the second end plate.

[0017] In one embodiment, the main heat exchange assembly further includes a fin group disposed between the first end plate and the second end plate, and the fin group is penetrated through the first heat exchange pipeline.

[0018] The utility model also provides a water heater, comprising:

[0019] A heat exchanger as described above; and

[0020] The burner is located on a side of the main heat exchange component away from the condensing heat exchange component.

[0021] The technical solution of the present invention is to assemble the main heat exchange component and the condensing heat exchange component in an integrated manner first, and connect the pipes of the two by welding. The arrangement of the main heat exchange component and the condensing heat exchange component is more compact, the heat exchanger does not take up too much space, and when the heat exchanger is subsequently assembled and used, there is no need to assemble and connect the main heat exchange component and the condensing heat exchange component through longer pipe connectors, which can simplify the assembly process of the main heat exchange component and the condensing heat exchange component and reduce the assembly cost of the main heat exchange component and the condensing heat exchange component, so that the overall assembly process of the heat exchanger with two-stage heat exchange function of the present invention can be simplified and the manufacturing cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of an embodiment of a heat exchanger provided by the utility model;

[0024] Figure 2 for Figure 1 Structural explosion diagram of the heat exchanger;

[0025] Figure 3 for Figure 2 A local enlarged view at point A;

[0026] Figure 4 for Figure 1 A structural diagram of the heat exchanger from another perspective;

[0027] Figure 5 for Figure 1 Side view of the heat exchanger;

[0028] Figure 6 for Figure 5 Sectional view at AA;

[0029] Figure 7 for Figure 6 A partial enlarged view at point B.

[0030] Description of Figure Numbers:

[0031] 100, heat exchanger; 10, main heat exchange component; 11, first heat exchange pipeline; 111, first connecting portion; 112, water outlet; 1111, flange; 12, fin group; 20, condensing heat exchange component; 21, second heat exchange pipeline; 211, second connecting portion; 2111, plug-in port; 212, water inlet; 33, reinforcement portion; 331, clearance slot; 30, first end plate; 31, arc-shaped notch; 32, support portion; 40, second end plate; 41, positioning portion; 50, water outlet pipe; 60, water inlet pipe.

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0036] When designing a gas water heater, in order to improve the thermal utilization rate of the gas water heater, a two-stage heat exchange method can be used. A primary heat exchanger and a secondary heat exchanger are arranged in sequence on the flue gas flow path, and the flue gas can exchange heat with the primary heat exchanger and the secondary heat exchanger in sequence to fully utilize the latent heat of vaporization of the flue gas and improve the energy efficiency of the water heater. In traditional technology, the primary heat exchanger and the secondary heat exchanger of the water heater are split designs, and a long pipe connector is required for assembly and connection between the two, which has a complex assembly structure and low assembly efficiency.

[0037] The utility model provides a heat exchanger 100 .

[0038] See also Figures 1 to 7 In one embodiment of the utility model, the heat exchanger 100 includes a main heat exchange component 10 and a condensing heat exchange component 20, the main heat exchange component 10 includes a first heat exchange pipeline 11, the condensing heat exchange component 20 is arranged opposite to the main heat exchange component 10, the condensing heat exchange component 20 includes a second heat exchange pipeline 21, and the water outlet end of the second heat exchange pipeline 21 is welded and connected to the water inlet end of the first heat exchange pipeline 11.

[0039] The heat exchanger 100 of the utility model includes a main heat exchange component 10 and a condensing heat exchange component 20, and the condensing heat exchange component 20 is located downstream of the main heat exchange component 10 in the flue gas flow direction, and the water outlet end of the second heat exchange pipeline 21 is connected to the water inlet end of the first heat exchange pipeline 11. In other words, the water heater used in the heat exchanger 100 takes in water through the second heat exchange pipeline 21 and then discharges water through the first heat exchange pipeline 11. In the downstream of the flue gas flow, the second heat exchange pipeline 21 with a lower temperature performs a primary water preheating, and then the first heat exchange pipeline 11 with a higher temperature performs a secondary water heating, so that the thermal efficiency of the water heater using the heat exchanger 100 is improved.

[0040] The heat exchanger 100 of the present invention includes a main heat exchange component 10 and a condensing heat exchange component 20. By first assembling the main heat exchange component 10 and the condensing heat exchange component 20 in an integrated manner and connecting the pipes of the two by welding, the arrangement of the main heat exchange component 10 and the condensing heat exchange component 20 is more compact, and the heat exchanger 100 does not occupy too much space. In the subsequent assembly and use of the heat exchanger 100, there is no need to assemble and connect the main heat exchange component 10 and the condensing heat exchange component 20 through a longer pipe connector, which can simplify the assembly process of the main heat exchange component 10 and the condensing heat exchange component 20 and reduce the assembly cost of the main heat exchange component 10 and the condensing heat exchange component 20, so that the overall assembly process of the heat exchanger 100 with a two-stage heat exchange function of the present invention can be simplified and the manufacturing cost can be reduced.

[0041] See also Figure 2 , Figure 3As shown, in the embodiment of the present utility model, the heat exchanger 100 further includes a first end plate 30 and a second end plate 40, the first end plate 30 is located on one side of the main heat exchange component 10, and the second end plate 40 is located on the other side of the main heat exchange component 10;

[0042] A first connection portion 111 is disposed at the water inlet end of the first heat exchange pipeline 11 , and a second connection portion 211 is disposed at the water outlet end of the second heat exchange pipeline 21 . The first connection portion 111 and the second connection portion 211 are welded.

[0043] In the above embodiments, the first end plate 30 and the second end plate 40 can be used to install and fix the main heat exchange component 10 and the condensing heat exchange component 20, wherein the two sides of the main heat exchange component 10 can be installed and fixed to the first end plate 30 and the second end plate 40 respectively, and the two sides of the condensing heat exchange component 20 can be installed and fixed to the first end plate 30 and the second end plate 40 respectively.

[0044] Furthermore, the first connection portion 111 and the second connection portion 211 may be welded at the first end plate 30 or the second end plate 40 , and the first end plate 30 or the second end plate 40 may provide a positioning and supporting platform for the connection between the first connection portion 111 and the second connection portion 211 .

[0045] See also Figure 2 , Figure 3 As shown, in an embodiment of the utility model, an arc-shaped notch 31 is opened at the edge of the first end plate 30. When the water outlet end of the second heat exchange pipeline 21 is welded to the water inlet end of the first heat exchange pipeline 11, the first connection part 111 or the second connection part 211 is positioned at the arc-shaped notch 31.

[0046] In the above embodiment, the first connection part 111 or the second connection part 211 can be placed in the arc-shaped notch 31. By setting the arc-shaped notch 31, one of the first heat exchange pipeline 11 and the second heat exchange pipeline 21 can be positioned during welding, thereby facilitating the docking of the other of the first heat exchange pipeline 11 and the second heat exchange pipeline 21, and providing support during welding.

[0047] Furthermore, in the above-mentioned embodiment, when the first connection part 111 or the second connection part 211 is positioned at the arc-shaped notch 31, the arc-shaped notch 31 abuts against the outer periphery of the first connection part 111 or the second connection part 211, and the entire inner wall surface of the arc-shaped notch 31 can be completely fitted with the outer periphery of the first connection part 111 or the second connection part 211.

[0048] Alternatively, in other embodiments, a notch of other shapes, such as a triangle, rectangle or pentagon, may be opened on one side of the first end plate 30, as long as the first connection part 111 or the second connection part 211 can be positioned in the notch to prevent the first connection part 111 or the second connection part 211 from shaking during the welding process.

[0049] The present invention does not limit the location of the arc notch 31. The arc notch 31 can be located at the bottom of the first end plate 30, or at the side of the first end plate 30. The location is determined by the directions of the first heat exchange pipeline 11 and the second heat exchange pipeline 21.

[0050] Continue reading Figure 2 , Figure 3 In the embodiment of the utility model, a support portion 32 extending toward a side away from the second end plate 40 is provided at the edge of the arc-shaped notch 31 , and the first connecting portion 111 or the second connecting portion 211 abuts against the inner side wall of the support portion 32 .

[0051] The support portion 32 may be a semi-arc-shaped protrusion protruding from the first end plate 30. The support portion 32 has an inner side wall facing the axis of the arc-shaped notch 31. When the first connection portion 111 or the second connection portion 211 is positioned in the arc-shaped notch 31, the first connection portion 111 or the second connection portion 211 abuts against the inner side wall of the support portion 32, and the contact area with the first connection portion 111 or the second connection portion 211 can be increased on the basis of the arc-shaped notch 31 positioning the first connection portion 111 or the second connection portion 211, thereby improving the positioning effect.

[0052] At the same time, a support portion 32 is provided. When the first connection portion 111 or the second connection portion 211 is positioned, since the inner wall area of ​​the support portion 32 is relatively large, welding can be performed at the contact position between the first connection portion 111 or the second connection portion 211 and the inner wall of the support portion 32, so that the first connection portion 111 or the second connection portion 211 can be fixed by welding after positioning, and when the first connection portion 111 and the second connection portion 211 are subsequently welded and docked, it can be more convenient to align the two, and the welding operation between the two is simpler.

[0053] To this end, the support portion 32 is arranged on the side of the first end plate 30 away from the second end plate 40, so that the support portion 32 is located on the outside of the entire heat exchanger 100, and flux can be applied to the inner wall of the support portion 32 to facilitate welding and fixing of the first connecting portion 111 or the second connecting portion 211 to the support portion 32.

[0054] Of course, in another embodiment, the support portion 32 may also be formed by extending from the edge of the arc-shaped notch 31 toward the side close to the second end plate 40 .

[0055] Continue reading Figure 2 , Figure 3 In an embodiment of the utility model, a reinforcing portion 33 extending toward a side away from the second end plate 40 is provided on the outer periphery of the first end plate 30, and a clearance groove 331 is provided at a position opposite to the supporting portion 32, and the projection of the clearance groove 331 in the direction toward the arc-shaped notch 31 at least completely covers the supporting portion 32.

[0056] In the present invention, a circle of reinforcement portion 33 is provided on the outer periphery of the first end plate 30 away from the second end plate 40 to enhance the overall structural strength of the first end plate 30 and prevent deformation of the first end plate 30. The second end plate 40 of the present invention can also be provided in this way.

[0057] Furthermore, by providing a clearance groove 331 at a position where the reinforcing portion 33 and the supporting portion 32 are opposite to each other, and making the diameter of the clearance groove 331 at least equal to the diameter of the arc-shaped notch 31, when the first connecting portion 111 and the second connecting portion 211 are butt-jointed and welded at the position of the clearance groove 331, the welding operation can be facilitated.

[0058] In another embodiment of the utility model, the reinforcing portion 33 can be arranged not only on the side of the first end plate 30 away from the second end plate 40, but also on the side of the first end plate 30 close to the second end plate 40, that is, the inner side of the heat exchanger 100. The reinforcing portion 33 can be arranged on the second end plate 40 in the same manner.

[0059] When the reinforcing portion 33 is disposed on a side of the first end plate 30 close to the second end plate 40, the reinforcing portion 33 is located on the inner side of the first end plate 30. When the second connecting portion 211 is positioned at the arc-shaped notch 31 and the first connecting portion 111 and the second connecting portion 211 are butt-welded on the outer side of the first end plate 30, there will be no interference with the welding of the first connecting portion 111 and the second connecting portion 211. Therefore, there is no need to open a clearance groove 331 in the reinforcing portion 33.

[0060] See also Figure 5 , Figure 6 , Figure 7 As shown, in the embodiment of the present invention, the second connection part 211 has a plug port 2111 , the first connection part 111 is inserted into the second connection part 211 from the plug port 2111 , and the outer periphery of the first connection part 111 abuts against the inner wall of the second connection part 211 .

[0061] When the first connection part 111 and the second connection part 211 are welded and connected, the first connection part 111 can be inserted into the second connection part 211. That is, the water inlet end of the first heat exchange pipeline 11 is accommodated inside the water outlet end of the second heat exchange pipeline 21. In this way, when the first heat exchange pipeline 11 and the second heat exchange pipeline 21 are welded and connected, the first connection part 111 can be positioned in the second connection part 211, and a certain relative position can be maintained between the two. Compared with butt welding with equal pipe diameters between the two, this embodiment can reduce the auxiliary positioning cost during welding.

[0062] Continue reading Figure 5 , Figure 6 , Figure 7 In an embodiment of the utility model, a flange 1111 is provided on the outer periphery of the first connection portion 111, and the flange 1111 is located on a side of the plug-in port 2111 away from the second connection portion 211, and a welding position for welding the first connection portion 111 and the second connection portion 211 is formed between the flange 1111 and the plug-in port 2111.

[0063] In the above embodiment, since the protruding edge 1111 is protruding from the first connection part 111, when the first connection part 111 is inserted into the second connection part 211 from the plug-in port 2111, the tube wall of the second connection part 211 is also protruding from the first connection part 111. With this arrangement, the first connection part 111 is in a recessed state at a position between the two protruding portions, so that flux can be filled in this position to weld and fix the first connection part 111 and the second connection part 211.

[0064] In addition, when the outer diameter of the flange 1111 is larger than the inner diameter of the second connection part 211, during the process of inserting the first connection part 111 into the second connection part 211, the flange 1111 can act as a limiter, so that the distance between the first connection part 111 inserted into the second connection part 211 will not exceed the distance from the end of the second connection part 211 to the flange 1111. Even if the first heat exchange pipeline 11 and the second heat exchange pipeline 21 are connected by welding, the position accuracy of the two relative to the heat exchanger 100 after connection can be guaranteed.

[0065] In an embodiment of the utility model, the first heat exchange pipeline 11 includes a plurality of first heat exchange tubes connected in series, and the first heat exchange tubes are copper tubes; the second heat exchange pipeline 21 includes a plurality of second heat exchange tubes connected in series, and the second heat exchange tubes are stainless steel tubes.

[0066] Among them, the first heat exchange pipeline 11 may include a plurality of first heat exchange tubes arranged along the second direction, the first end plate 30 and the second end plate 40 are arranged at intervals in the first direction, and the plurality of first heat exchange tubes are arranged between the first end plate 30 and the second end plate 40, and the plurality of first heat exchange tubes are connected in series in sequence to form the first heat exchange pipeline 11; wherein the first direction and the second direction are arranged crosswise.

[0067] In the above embodiment, the first heat exchange pipeline 11 also includes a first connecting elbow pipe that connects adjacent first heat exchange pipes in series, wherein the two ends of the first heat exchange pipe can be respectively passed through and fixed to the first end plate 30 and the second end plate 40, and the two ends of the first connecting elbow pipe are respectively connected to the ends of the two adjacent first heat exchange pipes, so that the two adjacent first heat exchange pipes are connected in series through the connecting elbow pipe. When any two adjacent first heat exchange pipes are connected in series through the first connecting elbow pipe, multiple first heat exchange pipes are connected in series in sequence to form the first heat exchange pipeline 11.

[0068] The second heat exchange tube is a straight tube, and the second heat exchange tubes can be connected in series in sequence so that the second heat exchange pipeline 21 is arranged in a spiral winding, or the second heat exchange tubes can be connected in series in sequence so that the second heat exchange pipeline 21 is arranged in a serpentine winding.

[0069] When the second heat exchange pipeline 21 is arranged in a spiral winding, multiple second heat exchange tubes connected in series move back and forth in the direction toward the main heat exchange component 10, and adjacent second heat exchange tubes are connected by a second connecting elbow. Multiple second heat exchange tubes close to the main heat exchange component 10 can be roughly located in the same plane, and multiple second heat exchange tubes far from the main heat exchange component 10 can also be roughly located in the same plane. In this way, the overall thickness of the second heat exchange pipeline 21 can be compressed while increasing the arrangement density of the second heat exchange tubes, thereby achieving the purpose of reducing the volume of the heat exchanger 100.

[0070] When the first heat exchange pipeline 11 is connected to the second heat exchange pipeline 21, a first connecting elbow can be provided at the water inlet end of the first heat exchange pipeline 11, and the first connecting portion 111 is formed on the first connecting elbow. A second heat exchange pipe can be provided at the end of the second heat exchange pipeline 21, and the second connecting portion 211 is formed on the second heat exchange pipe. Since the second heat exchange pipe is a straight pipe, when the first connecting portion 111 is connected to the second connecting portion 211, the straight pipe section is connected by the curved pipe section.

[0071] Since the first heat exchange pipeline 11 is located upstream of the flow of combustion flue gas, the temperature will be higher, while the second heat exchange pipeline 21 is located downstream of the flow of combustion flue gas, the temperature will be relatively low. Since the thermal conductivity of copper is better than that of stainless steel, the first heat exchange tube constituting the first heat exchange pipeline 11 is set as a copper tube, which can better absorb the incoming heat and improve the heat exchange efficiency. The temperature of the second heat exchange pipeline 21 is relatively low. When the second heat exchange tube constituting the second heat exchange pipeline 21 is set as a steel tube, the cost can be reduced.

[0072] At the same time, compared with the prior art, in which the pipe material of the first heat exchange pipeline 11 and the second heat exchange pipeline 21 is set to stainless steel, since the cost of copper is lower than that of stainless steel, the material cost will be lower when the stainless steel pipe is welded to the copper pipe. Moreover, when the stainless steel pipe is welded to the stainless steel pipe, the brazing process is required, and the welding process is complicated and the welding cost is high. However, when the copper pipe is welded to the stainless steel pipe, the brazing process is not required, and the welding cost will be lower.

[0073] See also Figure 1 , Figure 4 As shown, in the embodiment of the present utility model, the water outlet end of the first heat exchange pipeline 11 is provided with a water outlet portion 112, and the water inlet end of the second heat exchange pipeline 21 is provided with a water inlet portion 212;

[0074] The second end plate 40 has a positioning portion 41 , and a positioning hole is formed through the positioning portion 41 . The water outlet 112 is passed through the positioning hole so as to position the condensing heat exchange assembly 20 on the second end plate 40 .

[0075] In the above embodiment, after the main heat exchange assembly 10 is installed and fixed on the first end plate 30 and the second end plate 40, the water inlet portion 212 of the second heat exchange pipeline 21 can be inserted into the positioning hole, and when the second connection portion 211 is positioned to the arc-shaped notch 31, the second heat exchange pipeline 21 is shifted as a whole toward a position close to the first end plate 30, and the second connection portion 211 is sleeved with the first connection portion 111.

[0076] Since the first connection part 111 is located in the main heat exchange component 10, the main heat exchange component 10 has been fixed. Therefore, after the first connection part 111 and the second connection part 211 are connected to each other, both ends of the second heat exchange pipeline 21 are positioned, so that the second heat exchange pipeline 21 is positioned as a whole. When the first connection part 111 and the second connection part 211 are welded, the manual positioning of the second heat exchange pipeline 21 can be reduced.

[0077] Continue reading Figure 1 , Figure 4 In the embodiment of the utility model, the heat exchanger 100 further includes a water outlet pipe 50 and a water inlet pipe 60. The water outlet portion 112 is provided with a water inlet port for water inletting the heat exchanger 100, the water inlet portion 212 is provided with a water outlet port for water outlet of the heat exchanger 100, the water outlet pipe 50 is connected to the water outlet port, and the water inlet pipe 60 is connected to the water inlet port.

[0078] See also Figure 4 As shown, in an embodiment of the present utility model, the main heat exchange assembly 10 further includes a fin group 12 disposed between the first end plate 30 and the second end plate 40 , and the fin group 12 is disposed through the first heat exchange pipeline 11 .

[0079] The fin group 12 is composed of a plurality of fins arranged side by side, and the plurality of fins are arranged side by side between the first end plate 30 and the second end plate 40 along the first direction, and the plurality of fins are penetrated with holes, and the plurality of fins are penetrated in the plurality of first heat exchange tubes through the holes. That is to say, after the fins are connected to the first heat exchange tubes, the outer periphery of the first heat exchange tubes fits the inner wall of the holes. With such a configuration, after the fins absorb heat, the heat absorbed by the fins can be transferred to the first heat exchange tubes, so as to heat the water inside the heat exchange tubes.

[0080] The utility model also provides a water heater, which includes a burner and a heat exchanger 100. The specific structure of the heat exchanger 100 refers to the above embodiment. Since the water heater adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the burner is located on the side of the main heat exchange component 10 away from the condensing heat exchange component 20.

[0081] In the present invention, the main heat exchange component 10 is closer to the burner than the condensing heat exchange component 20. When the water heater of the present invention is working, the temperature of the main heat exchange component 10 will be higher. Since the present invention adopts the method of water inlet of the condensing heat exchange component 20 and water outlet of the main heat exchange component 10, the water flowing inside the water heater will be preheated at the position of the condensing heat exchange component 20 with a lower temperature, and further heated at the position of the main heat exchange component 10 with a higher temperature, so that the water temperature reaches the value preset for the water heater. Such a setting makes the heat utilization efficiency of the water heater higher, thereby improving the energy efficiency of the water heater.

[0082] It is understandable that the water heater of the utility model can be a gas water heater, wherein the gas water heater can be a strong-drum gas water heater or a strong-extraction gas water heater. The water heater can also include a housing for mounting the burner and the heat exchanger 100, an exhaust fan or a blower arranged in the housing, and a smoke exhaust component for exhausting combustion smoke.

[0083] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A heat exchanger, characterized in that: include: A main heat exchange component, the main heat exchange component comprising a first heat exchange pipeline; as well as The condensing heat exchange component is arranged opposite to the main heat exchange component, and the condensing heat exchange component includes a second heat exchange pipeline, and the water outlet end of the second heat exchange pipeline is welded and connected to the water inlet end of the first heat exchange pipeline.

2. The heat exchanger according to claim 1, characterized in that The heat exchanger further comprises a first end plate and a second end plate, wherein the first end plate is located on one side of the main heat exchange component, and the second end plate is located on the other side of the main heat exchange component; A first connection portion is provided at the water inlet end of the first heat exchange pipeline, a second connection portion is provided at the water outlet end of the second heat exchange pipeline, and the first connection portion is welded to the second connection portion.

3. The heat exchanger according to claim 2, characterized in that An arc-shaped notch is provided at the edge of the first end plate. When the water outlet end of the second heat exchange pipeline is welded to the water inlet end of the first heat exchange pipeline, the first connecting portion or the second connecting portion is positioned at the arc-shaped notch.

4. The heat exchanger according to claim 3, characterized in that A support portion is provided at an edge of the arc-shaped notch and extends toward a side away from the second end plate, and the first connecting portion or the second connecting portion abuts against an inner side wall of the support portion.

5. The heat exchanger according to claim 4, characterized in that The outer periphery of the first end plate is provided with a reinforcing portion extending toward a side away from the second end plate, and a clearance groove is provided at a position opposite to the supporting portion, and the projection of the clearance groove in the direction toward the arc-shaped notch at least completely covers the supporting portion.

6. The heat exchanger according to claim 2, characterized in that: The second connection part has an insertion port, the first connection part is inserted into the second connection part through the insertion port, and the outer periphery of the first connection part abuts against the inner wall of the second connection part.

7. The heat exchanger according to claim 6, characterized in that A convex edge is provided on the outer periphery of the first connection part, and the convex edge is located on a side of the plug port away from the second connection part. A welding position for welding the first connection part and the second connection part is formed between the convex edge and the plug port.

8. The heat exchanger according to claim 6, characterized in that The first heat exchange pipeline includes a plurality of first heat exchange tubes connected in series, and the first heat exchange tubes are copper tubes; the second heat exchange pipeline includes a plurality of second heat exchange tubes connected in series, and the second heat exchange tubes are stainless steel tubes.

9. The heat exchanger according to claim 2, characterized in that: The water outlet end of the first heat exchange pipeline is provided with a water outlet, and the water inlet end of the second heat exchange pipeline is provided with a water inlet; The second end plate has a positioning portion, the positioning portion is penetrated by a positioning hole, and the water outlet is inserted into the positioning hole to position the condensing heat exchange component on the second end plate.

10. The heat exchanger according to any one of claims 2 to 9, characterized in that The main heat exchange component further includes a fin group disposed between the first end plate and the second end plate, and the fin group is penetrated through the first heat exchange pipeline.

11. A water heater, characterized in that: include: The heat exchanger according to any one of claims 1 to 10; as well as The burner is located on a side of the main heat exchange component away from the condensing heat exchange component.

Images