Water heater heat exchange module and water heater comprising same

Abstract

The heat exchange module of the water heater comprises a heat exchanger, a quick connector, a first pipeline and a second pipeline, the quick connector comprises a body and a movable part which is movably connected relative to one side or two sides of the body, and connecting cavities are formed in the two ends of the body. A clamping spring is arranged in the connecting cavity on one side or the connecting cavities on the two sides, the clamping spring comprises a clamping part and an extension part, and a groove or a protrusion is arranged on the first pipeline and / or the second pipeline. In the process that the movable part moves towards the clamping spring, the movable part expands the extension part and enables the clamping part to be opened outwards so as to release the groove or the protrusion. When the movable part moves away from the clamp spring, the extension part and the clamping part contract through self elasticity so as to clamp the groove or the protrusion. According to the heat exchange module of the water heater and the water heater comprising the heat exchange module, the pipelines can be quickly inserted or pulled out, the structure is simple, the connection operation efficiency is high, and convenience is achieved; and the connection reliability is high, and loosening and separation are not prone to occurring.

Description

Technical Field

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

[0002] The heat exchange module is one of the core components that affects the thermal efficiency of the water heater. The heat exchange module is mainly composed of a heat exchanger and a water circuit. The temperature detection of the heat exchange module and the antifreeze of the water circuit, as well as the connection method between the heat exchanger and the water circuit are two key issues in the entire module.

[0003] There are two main structures for conventional heat exchange module connection: one is to weld the stainless steel heat exchanger to the upper stainless steel water channel (the water inlet pipe of the heat exchanger), and then connect the upper and lower stainless steel water channels through a card-type structure or with screws; the other is to weld the copper heat exchanger to the integral copper water channel. In addition, temperature detection and antifreeze are mostly done by installing temperature sensors and heating rods on the front and rear surfaces of the heat exchanger, which is very troublesome to repair and replace the components installed on the rear surface.

[0004] If the upper and lower stainless steel water flows are connected by cards, they are prone to loosening, installation is laborious, and the water pressure resistance is relatively poor; if the copper heat exchanger and the copper water channel are welded as a whole, the welding is difficult, the flux filling is difficult, and desoldering is prone to occur. The required clamping tooling is very bulky, occupies a large space in the welding furnace, has low production efficiency and high cost.

[0005] In the prior art, although there are also quick-disconnection connection methods, the quick-disconnection connectors in the prior art have complex structures, are not easy to operate and plug in, are easy to loosen, and have poor reliability. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the defects of the complicated structure of the pipe joints of the heat exchanger of the water heater in the prior art and the difficulty in operation, and to provide a water heater heat exchange module and a water heater including the same.

[0007] The utility model solves the above technical problems through the following technical solutions:

[0008] A water heater heat exchange module, the water heater heat exchange module comprising a heat exchanger, a quick-connect joint, and a first pipeline and a second pipeline, the first pipeline is connected to the heat exchanger, and the first pipeline and the second pipeline are respectively detachably connected to the quick-connect joint,

[0009] The quick-connect connector includes a body and a movable portion movably connected to one side or both sides of the body, and connecting cavities for accommodating the first pipeline and the second pipeline are provided at both ends of the body.

[0010] A clamping spring is arranged in the connecting cavity on one side or both sides, and the clamping spring includes a clamping portion and an extension portion, and a through hole is provided in the middle of the clamping portion for the first pipeline or the second pipeline to pass through; a groove or a protrusion is provided on the first pipeline and / or the second pipeline;

[0011] When the movable part moves toward the retaining spring, the movable part expands the extension part and causes the clamping part to open outward to release the groove or the protrusion; when the movable part moves away from the retaining spring, the extension part and the clamping part contract elastically to clamp the groove or the protrusion.

[0012] In this solution, the grooves or protrusions provided on the two pipelines (the first pipeline and the second pipeline) of the water heater heat exchange module are used to engage with the retaining spring, so that the quick-connect connector and the pipeline are tightly connected together, preventing the retaining spring from causing indentations on the pipeline and causing it to fall off. When the two pipelines are connected, the connection cavity of the quick-connect connector is inserted, and then the pipeline is pulled out or the elasticity of the quick-connect connector itself is used to move the movable part away from the retaining spring. The extension part and the clamping part of the retaining spring shrink through their own elasticity, so that the clamping part clamps the groove or protrusion, thereby realizing the rapid connection and locking of the two pipelines. When the two pipelines are to be disassembled and separated, the movable part is driven to move toward the retaining spring, and the extension part is expanded by the movable part, so that the clamping part opens outward to release and detach the clamping part from the groove or protrusion, thereby realizing the rapid disassembly and separation of the two pipelines. When the water heater heat exchange module is connecting or removing two pipes, the quick connection can be achieved through the cooperation of the quick-insert connector, the retaining spring and the groove, which has a simple structure and reduces the difficulty of processing; the connection between the pipes does not require complex operations such as welding, the connection operation is efficient and the installation is convenient; the connection is reliable through the clamping of the retaining spring and the groove or protrusion, and it is not easy to loosen or fall off.

[0013] Preferably, the movable portion comprises an expansion end, the expansion end contacts the retaining spring and expands the retaining spring, the expansion end is an integral structure along the circumferential direction or the expansion end is composed of a plurality of separate units along the circumferential direction.

[0014] In this solution, the expansion end contacts and expands the retaining spring, so that the clamping part of the retaining spring is separated from the groove or protrusion; and when the movable part moves away from the retaining spring, the expansion end does not contact the retaining spring, and the retaining spring contracts by its own elasticity to clamp the groove or protrusion. When the expansion end is an integral structure along its circumference, the movable part of the quick-connect connector is easy to process and manufacture. When the expansion end is composed of multiple split units along the circumference, the material for manufacturing the movable part is saved, and the elasticity generated by the cooperation of the multiple split units is used to adjust the strength of the expansion retaining spring, making it easier to plug and unplug the pipeline.

[0015] Preferably, the movable portion comprises an expansion end, an outer peripheral surface of the expansion end is a conical shape that gradually contracts in a direction toward the retaining spring, and the extension portion has a shape that matches the outer peripheral surface of the expansion end.

[0016] In this solution, the outer peripheral surface of the expansion end adopts the conical shape set above, and the outer peripheral surface of the extension part matches the conical surface of the expansion end, so as to realize the gradual contraction or expansion between the expansion end and the extension part, and the engagement operation between the movable part of the quick-insert connector and the retaining spring is easier.

[0017] Preferably, the clamping portion is an integral structure along the circumferential direction or the clamping portion is composed of a plurality of split units along the circumferential direction.

[0018] In this solution, when the clamping part is an integral structure along its circumference, the clamping spring is easy to process and manufacture, and the expansion end achieves overall contraction through its own elasticity. When the clamping part is composed of multiple split units along the circumference, the split units have better elasticity, and the movable part of the quick-connect connector is easier to open the split units, making the operation of plugging and unplugging the pipeline easier.

[0019] Preferably, the clamping portion is inclined relative to an insertion direction of the first pipeline or the second pipeline into the connecting cavity.

[0020] In this solution, the clamping portion is inclined relative to the insertion direction, so that when the pipeline attempts to be pulled out from the connecting cavity, the clamping portion can generate resistance in the pulling-out direction, so that the pipeline will not be pulled out, thereby ensuring the reliability of the connection.

[0021] Preferably, the number of the grooves or the protrusions is at least two.

[0022] In this solution, two or more grooves or protrusions are provided to ensure that the grooves or protrusions have spare clamping positions, thereby improving the reliability of the clamping.

[0023] Preferably, the water heater heat exchange module further comprises a seal, which is disposed in the connecting cavity, wherein the inner side of the seal is in contact with the outer walls of the first pipeline and the second pipeline, and the outer side of the seal is in contact with the inner wall of the connecting cavity.

[0024] In this solution, the sealing member provided above prevents water flowing in the first pipeline and the second pipeline from flowing out of the connection cavity, thereby ensuring the sealing between the quick-connect connector and the two pipelines and improving the water pressure resistance.

[0025] Preferably, the movable part includes a pressing end and an expansion end, the pressing end is located outside the connecting cavity, and the expansion end is located inside the connecting cavity, the pressing end and the expansion end have through holes for allowing the first pipeline and the second pipeline to pass through, and the pressing end is used to push the expansion end to move so as to contact the retaining spring and expand the retaining spring.

[0026] In this solution, the expansion end is pushed to move by pressing the pressing end, so that the expansion end moves in the connecting cavity to contact with the retaining spring and expand the retaining spring.

[0027] Preferably, a communicating cavity is further provided between the connecting cavities at both ends of the body;

[0028] And / or, the material of the retaining spring is metal.

[0029] In this solution, two pipelines (a first pipeline and a second pipeline) are connected through a connecting cavity, and the water heater heat exchanger is connected to the outside through the two connected pipelines. The clamping spring is made of metal material, and the metal material itself has elasticity, so the clamping spring can be easily contracted or expanded, and has high clamping strength.

[0030] A water heater comprises the water heater heat exchange module as described above.

[0031] In this solution, the water heater adopts the above-mentioned water heater heat exchange module to achieve quick plug-in or pull-out between the two pipes connected to the heat exchanger. It has a simple structure and is efficient and convenient to connect. In addition, through the clamping connection between the retaining spring and the groove or protrusion, the connection is reliable and not easy to loosen or detach.

[0032] The positive progressive effect of the utility model is that the water heater heat exchange module and the water heater including the same can realize quick plugging or unplugging between pipelines through the above-mentioned structural setting, and the structure is simple, the connection operation is efficient and convenient; and the connection reliability is high and it is not easy to loosen or detach. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of the water heater heat exchange module of Example 1 of the utility model, wherein the second pipeline is not shown.

[0034] Figure 2 This is a structural schematic diagram of the quick-connect connector and pipeline connection in Example 1 of the utility model.

[0035] Figure 3 This is a schematic diagram of the three-dimensional structure of the quick-connect connector and the pipeline connection in Example 1 of the utility model, wherein the second pipeline and the retaining spring corresponding to the second pipeline are not shown.

[0036] Figure 4This is a schematic diagram of the partial structure of the retaining spring clamped on the first pipeline in Example 1 of the utility model.

[0037] Figure 5 This is a schematic diagram of a half-section joint of the retaining spring of Example 1 of the utility model.

[0038] Figure 6 It is a top view of the retaining spring of Example 1 of the utility model.

[0039] Description of reference numerals:

[0040] Water heater heat exchange module 1

[0041] Heat exchanger 2

[0042] Quick-connect fitting 3

[0043] Ontology 31

[0044] Connecting cavity 310

[0045] Connecting cavity 320

[0046] Activities Department 32

[0047] Pressing end 321

[0048] Expansion end 322

[0049] First pipeline 4

[0050] Second pipeline 5

[0051] Groove 6

[0052] Circlip 7

[0053] The clamping portion 71

[0054] Extension 72

[0055] Seal 8

[0056] Sunken temperature relay 9

[0057] Stainless steel heating rod 10

[0058] Insertion direction A DETAILED DESCRIPTION

[0059] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0060] Example 1

[0061] The present embodiment provides a water heater heat exchange module 1, which is arranged in the water heater housing. External cold water is passed into the heat exchange module through a pipeline for heat exchange, and the hot water after heat exchange flows out of the heat exchange module through the pipeline for use by users.

[0062] like Figure 1-6 As shown, the water heater heat exchange module 1 includes a heat exchanger 2, a quick connector 3, a first pipeline 4 and a second pipeline 5, the first pipeline 4 is connected to the heat exchanger 2, and the first pipeline 4 and the second pipeline 5 are respectively detachably connected to the quick connector 3. Specifically, in this embodiment, the heat exchanger 2 and the first pipeline 4 are made of stainless steel, the second pipeline 5 is made of copper, and the quick connector 3 is a plastic part. The first pipeline 4 is located at the upper part of the heat exchanger 2, welded to the heat exchanger 2, and then connected to the second pipeline 5 located at the lower part through the quick connector 3. In other embodiments, the materials of the heat exchanger 2, the first pipeline 4, the second pipeline 5 and the quick connector 3 can also be adjusted accordingly as needed, and the connection method between the first pipeline 4 and the heat exchanger 2 can also adopt other connection methods and processes.

[0063] Among them, the quick-insert connector 3 includes a main body 31 and a movable part 32 movably connected to one side or both sides of the main body 31, and connecting cavities 310 for accommodating the first pipeline 4 and the second pipeline 5 are provided at both ends of the main body 31. A retaining spring 7 is provided in the connecting cavity 310 on one side or both sides, and the retaining spring 7 includes a clamping part 71 and an extension part 72. The clamping part 71 has a through hole in the middle for the first pipeline 4 or the second pipeline 5 to pass through; a groove 6 or a protrusion is provided on the first pipeline 4 and / or the second pipeline 5; when the movable part 32 moves toward the retaining spring 7, the movable part 32 expands the extension part 72 and makes the clamping part 71 open outward to release the groove 6 or the protrusion; when the movable part 32 moves away from the retaining spring 7, the extension part 72 and the clamping part 71 shrink through their own elasticity so that the clamping part 71 clamps the groove 6 or the protrusion.

[0064] Specifically, in this embodiment, the quick-connect connector 3 is an injection-molded pipe fitting, and the connecting cavities 310 at both ends of the body 31 are provided with movable parts 32. The retaining spring 7 is a metal retaining spring 7, which has a certain elasticity, and is therefore also called an elastic retaining spring 7. The extension 72 and the clamping part 71 of the retaining spring 7 are both annular sheet structures, and there is a through hole in the middle of the clamping part 71 for the pipeline to pass through. The outer surfaces of the first pipeline 4 and the second pipeline 5 are provided with grooves 6, and the clamping part 71 is used to fit with the grooves 6. In other embodiments, according to the effect requirements, the retaining spring 7 can also be made of other elastic materials; the shape structure of the quick-connect connector 3 and the retaining spring 7 can be adjusted accordingly according to the shape of the pipeline to which it is connected; of the two pipelines (the first pipeline 4 and the second pipeline 5), only one pipeline can be connected using the quick-connect connector 3 of the above structure, and the other pipeline can be connected using other connection methods. The structure on the pipeline surface for engaging with the retaining spring 7 may also be a protrusion, through which the retaining spring 7 can be clamped or released from the protrusion. Alternatively, one pipeline surface may have a groove 6 while the other pipeline surface may have a protrusion structure that cooperates with the retaining spring 7.

[0065] The groove 6 or protrusion provided on the two pipelines (the first pipeline 4 and the second pipeline 5) of the water heater heat exchange module 1 is used to engage with the retaining spring 7, so that the quick-insert connector 3 is tightly connected to the metal pipeline, preventing the retaining spring 7 from being unable to produce an indentation on the pipeline and causing it to fall off. When the two pipelines are connected, the connecting cavity 310 of the quick-insert connector 3 is inserted, and then the pipeline is pulled out or the elasticity of the quick-insert connector 3 itself is used to make the movable part 32 move away from the retaining spring 7, and the extension part 72 and the clamping part 71 of the retaining spring 7 shrink through their own elasticity, so that the clamping part 71 clamps the groove 6 or protrusion, thereby realizing the rapid connection and locking of the two pipelines. When the two pipelines are to be disassembled and separated, the movable part 32 is driven to move toward the retaining spring 7, and the extension part 72 is expanded by the movable part 32, so that the clamping part 71 is opened outward to release and detach the clamping part 71 from the groove 6 or the protrusion, thereby realizing the rapid disassembly and separation of the two pipelines. When the water heater heat exchange module 1 is connecting or removing two pipelines, the quick connection can be achieved through the cooperation of the quick-insertion connector 3, the retaining spring 7 and the groove 6, without the need for large-volume fixtures, and the structure is simple, which reduces the difficulty of processing; the connection between the pipelines does not require complex operations such as welding, avoiding the difficulty in welding the connection between the stainless steel water pipe and the copper pipe, and the connection operation is efficient and easy to install; through the clamping connection between the retaining spring 7 and the groove 6 or the protrusion, the connection is reliable and not easy to loosen or detach.

[0066] The movable part 32 includes a pressing end 321 and an expansion end 322, wherein the pressing end 321 is located outside the connecting cavity 310, and the expansion end 322 is located inside the connecting cavity 310. The pressing end 321 and the expansion end 322 have through holes for the first pipeline 4 and the second pipeline 5 to pass through, and the pressing end 321 is used to push the expansion end 322 to move so as to contact with the clamping spring 7 and expand the clamping spring 7. When in use, by pressing the pressing end 321, the expansion end 322 is pushed to move, so as to realize the expansion end 322 moving in the connecting cavity 310 so as to contact with the clamping spring 7 and expand the clamping spring 7.

[0067] Among them, the expansion end 322 contacts the retaining spring 7 and expands the retaining spring 7, and the expansion end 322 is an integral structure along the circumferential direction or the expansion end 322 is composed of a plurality of split units along the circumferential direction. Specifically, in the present embodiment, the pressing end 321 is an annular boss, and the expansion end 322 is an annular barb structure, and they form an integral structure along the circumferential direction, and the pressing end 321 and the pressing end 321 are integrally formed by an injection molding process. In other embodiments, the movable part 32 may have different shapes and structural forms, and may adopt other shapes and structures that are more conducive to cooperating with the retaining spring 7 to expand the retaining spring 7 or shrink the retaining spring 7. The movable part 32 may also be composed of a plurality of split units along the circumferential direction to meet the needs of more flexible expansion or contraction effects.

[0068] The movable part 32 contacts and expands the retaining spring 7 through the expansion end 322, so that the clamping part 71 of the retaining spring 7 is separated from the groove 6 or the protrusion; when the movable part 32 moves away from the retaining spring 7, the expansion end 322 does not contact the retaining spring 7, and the retaining spring 7 contracts by its own elasticity to clamp the groove 6 or the protrusion. When the expansion end 322 is an integral structure along its circumference, the movable part 32 of the quick-connect connector 3 is easy to process and manufacture. When the expansion end 322 is composed of multiple split units along the circumference, the material for manufacturing the movable part 32 is saved, and the elasticity generated by the cooperation of the multiple split units is used to adjust the strength of the expansion retaining spring 7, making the operation of plugging and unplugging the pipeline easier.

[0069] Among them, Figure 2 As shown, the outer peripheral surface of the expansion end 322 is a conical surface shape that gradually shrinks in the direction toward the retaining spring 7, and the extension portion 72 has a shape that matches the outer peripheral surface of the expansion end 322. Through such mutually matching conical surface shapes, the expansion end 322 and the extension portion 72 are gradually contracted or expanded, and the engagement operation between the movable portion 32 of the quick-insertion connector 3 and the retaining spring 7 is easier.

[0070] The clamping portion 71 is an integral structure along the circumferential direction or is composed of a plurality of separate units along the circumferential direction. Figure 4-6 As shown, the clamping portion 71 of the retaining spring 7 is composed of a plurality of split units along the circumferential direction, and each split unit is a small metal card, and each metal card is arranged at intervals. When the retaining spring 7 contracts, the metal card can be embedded in the groove 6 on the outer surface of the first pipeline 4 and the second pipeline 5 to achieve clamping. Similar to the expansion end 322 of the movable portion 32, in other embodiments, the clamping portion 71 can also adopt an integrated structure along the circumferential direction. When the clamping portion 71 is an integrated structure along its circumference, the retaining spring 7 is easy to process and manufacture, and the expansion end 322 realizes overall contraction through its own elasticity. When the clamping portion 71 is composed of a plurality of split units along the circumferential direction, the split units have better elasticity, and the movable portion 32 of the quick-connect connector 3 is easier to open the split units, making the operation of plugging and unplugging the pipelines easier.

[0071] Among them, Figure 5 As shown, the clamping portion 71 is inclined relative to the insertion direction A of the first pipeline 4 or the second pipeline 5 into the connection cavity 310. In this embodiment, the clamping portions 71 of the two clamping springs 7 are both inclined relative to the first pipeline 4 and the second pipeline. Of course, in other embodiments, only one clamping portion 71 of the clamping spring 7 can be inclined, while the clamping portion 71 of the other clamping spring 7 is still arranged in a parallel manner. However, in this embodiment, the clamping portion 71 is inclined relative to the insertion direction A, so that when the pipeline attempts to be pulled out of the connection cavity 310, the clamping portion 71 can generate resistance in the pulling-out direction (opposite to the insertion direction A), so that the pipeline will not be pulled out, thereby ensuring the reliability of the connection.

[0072] In this embodiment, the outer surface of each pipeline is provided with three grooves 6. Generally speaking, in order to improve the reliability of connection, the number of grooves 6 or protrusions is at least two, so as to ensure that the grooves 6 or protrusions have spare clamping positions and improve the reliability of clamping.

[0073] Among them, Figure 2 As shown, the water heater heat exchange module 1 also includes a seal 8, which is specifically a sealing ring. The seal 8 is arranged in the connection cavity 310, and the inner side of the seal 8 is attached to the outer wall of the first pipeline 4 and the second pipeline 5, and the outer side of the seal 8 is attached to the inner wall of the connection cavity 310. Through the seal 8 arranged as above, the water flowing in the first pipeline 4 and the second pipeline 5 will not flow out of the connection cavity 310, thereby ensuring the sealing between the quick connector 3 and the two pipelines and improving the water pressure resistance.

[0074] Among them, Figure 2 and Figure 3 As shown, a communication cavity 320 is further provided between the connection cavities 310 at both ends of the body 31, and two pipelines (the first pipeline 4 and the second pipeline 5) are connected through the communication cavity 320, and the water heater heat exchanger 2 is connected to the outside through the two connected pipelines.

[0075] like Figure 1 As shown, in this embodiment, a temperature control front panel, a sunken temperature relay 9, and a stainless steel heating rod 10 cover are also provided on the front surface of the heat exchanger 2, integrating the entire temperature detection and antifreeze module into the front surface, which is convenient for subsequent inspection and maintenance. Compared with other types of temperature detection devices and heating devices, this embodiment uses a sunken temperature relay and a stainless steel heating rod, making it easier to replace components such as the temperature relay and the heating rod.

[0076] Example 2

[0077] This embodiment provides a water heater, which includes a water heater heat exchange module 1 as in Embodiment 1. The water heater adopts the water heater heat exchange module 1, and the two pipes connected by the heat exchanger 2 are quickly plugged in or out, and the structure is simple, and the connection operation is efficient and convenient; and the connection is reliable and not easy to loosen or disengage through the clamping of the clamping spring 7 and the groove 6 or the protrusion.

[0078] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A water heater heat exchange module, comprising a heat exchanger, a quick-connect fitting, and a first pipeline and a second pipeline, wherein the first pipeline is connected to the heat exchanger, and the first pipeline and the second pipeline are detachably connected to the quick-connect fitting, respectively, characterized in that: The quick-connect connector includes a body and a movable portion movably connected to one side or both sides of the body, and connecting cavities for accommodating the first pipeline and the second pipeline are provided at both ends of the body. A clamping spring is arranged in the connecting cavity on one side or both sides, and the clamping spring includes a clamping portion and an extension portion, and a through hole is provided in the middle of the clamping portion for the first pipeline or the second pipeline to pass through; a groove or a protrusion is provided on the first pipeline and / or the second pipeline; When the movable portion moves toward the clamping spring, the movable portion expands the extension portion and causes the clamping portion to open outward to release the groove or the protrusion; When the movable portion moves away from the clamping spring, the extension portion and the clamping portion shrink by their own elasticity, so that the clamping portion clamps the groove or the protrusion.

2. The water heater heat exchange module according to claim 1, characterized in that: The movable portion includes an expansion end, the expansion end contacts the clamping spring and expands the clamping spring, and the expansion end is an integral structure along the circumferential direction or is composed of a plurality of split units along the circumferential direction.

3. The water heater heat exchange module according to claim 1, characterized in that: The movable portion comprises an expansion end, an outer peripheral surface of the expansion end is a conical surface shape which gradually contracts in a direction toward the clamping spring, and the extension portion has a shape matching the outer peripheral surface of the expansion end.

4. The water heater heat exchange module according to claim 1, characterized in that: The clamping portion is an integral structure along the circumferential direction or is composed of a plurality of split units along the circumferential direction.

5. The water heater heat exchange module according to claim 1, characterized in that: The clamping portion is inclined relative to an insertion direction of the first pipeline or the second pipeline into the connecting cavity.

6. The water heater heat exchange module according to claim 1, characterized in that: The number of the grooves or the protrusions is at least two.

7. The water heater heat exchange module according to claim 1, characterized in that: The water heater heat exchange module further comprises a seal, which is disposed in the connection cavity, wherein the inner side of the seal is in contact with the outer walls of the first pipeline and the second pipeline, and the outer side of the seal is in contact with the inner wall of the connection cavity.

8. The water heater heat exchange module according to claim 1, characterized in that: The movable part includes a pressing end and an expansion end, the pressing end is located outside the connecting cavity, and the expansion end is located inside the connecting cavity. The pressing end and the expansion end have through holes for allowing the first pipeline and the second pipeline to pass through, and the pressing end is used to push the expansion end to move so as to contact the retaining spring and expand the retaining spring.

9. The water heater heat exchange module according to any one of claims 1 to 8, characterized in that: A communication cavity is also provided between the connection cavities at both ends of the body; And / or, the material of the retaining spring is metal.

10. A water heater, characterized in that: The water heater comprises a water heater heat exchange module as claimed in any one of claims 1 to 9.

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