Heat exchanger and water heater

Abstract

The invention provides a heat exchanger and a water heater. The heat exchanger comprises a shell, a heat exchange assembly and a plurality of turbulent flow pieces. An air inlet and an air outlet are respectively formed in two sides of the shell; the multiple turbulent flow pieces are arranged in the shell in a staggered mode and located between the air inlet and the air outlet; the heat exchange assembly is arranged between the multiple flow disturbing pieces. The heat utilization rate and the heat exchange efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and particularly to a heat exchanger and a water heater. Background Art

[0002] A gas instantaneous water heater is a water heater that can quickly heat cold water to a set temperature. Compared with traditional electric water heaters and solar water heaters, gas instantaneous water heaters have the advantages of energy conservation and not relying on natural gas, so they are more and more popular among users.

[0003] Gas water heaters mainly rely on the heat in the flue gas generated by gas combustion to exchange heat with cold water in the pipeline, thereby heating the cold water. However, at present, the temperature of the flue gas discharged after heat exchange in gas water heaters is still relatively high, resulting in insufficient heat utilization. Summary of the Invention

[0004] The present invention provides a heat exchanger and a water heater, aiming to solve the problem of insufficient heat utilization of current water heaters.

[0005] In a first aspect, the present invention provides a heat exchanger for use in a water heater. The heat exchanger includes a housing, a heat exchange component, and a plurality of flow deflectors; an air inlet and an air outlet are respectively provided on two sides of the housing; the plurality of flow deflectors are staggered in the housing and located between the air inlet and the air outlet; the heat exchange component is disposed between the plurality of flow deflectors.

[0006] Further, the housing includes a cover plate and a bottom plate. The air outlet is provided on one side of the cover plate, and the air inlet is provided on the other side of the bottom plate opposite to the cover plate.

[0007] Further, the plurality of flow deflectors are staggered on the cover plate and the bottom plate to form a flow deflection channel; the inlet of the flow deflection channel is communicated with the air inlet, and the outlet of the flow deflection channel is communicated with the air outlet for the flue gas to pass through.

[0008] Further, the plurality of flow deflectors include a first flow deflector, a second flow deflector, a third flow deflector, and a fourth flow deflector; the first flow deflector is disposed on one side of the bottom plate and spaced apart from the cover plate to form a first compartment; the second flow deflector is disposed on the cover plate and spaced apart from the first flow deflector to form a second compartment; the third flow deflector is disposed on the bottom plate and spaced apart from the second flow deflector to form a third compartment; the fourth flow deflector is spaced apart from the third flow deflector to form a fourth compartment, and the fourth flow deflector is also spaced apart from the other side of the bottom plate to form a fifth compartment; wherein, the first compartment, the second compartment, the third compartment, the fourth compartment, and the fifth compartment are used for the flue gas to pass through in sequence.

[0009] Further, the heat exchange component includes a pipe component and a heat exchange module; the heat exchange module is disposed in the turbulent flow channel and is provided with a passage for the pipe component to pass through; the pipe component is disposed in the passage, and one end of the pipe component passes through the bottom plate as the water inlet, and the other end of the pipe component passes through the cover plate as the water outlet.

[0010] Further, the heat exchange module includes a plurality of sub-modules, and the plurality of sub-modules are sequentially disposed in the first compartment, the second compartment, the third compartment, the fourth compartment, and the fifth compartment.

[0011] Further, the first turbulent flow member, the second turbulent flow member, the third turbulent flow member, and the fourth turbulent flow member are all provided with through holes for the pipe component to pass through.

[0012] Further, the bottom plates in the second compartment and the third compartment, and the bottom plates in the fourth compartment and the fifth compartment are respectively provided with a first diversion groove and a second diversion groove, and the first diversion groove and the second diversion groove are communicated.

[0013] Further, a condensation pipe is provided at the end of the bottom plate opposite to the second diversion groove, and the condensation pipe is communicated with the second diversion groove.

[0014] In a second aspect, the present invention provides a water heater, and the water heater includes the heat exchanger described in any one of the above.

[0015] The present invention discloses a heat exchanger and a water heater. The heat exchanger includes a housing and a plurality of turbulent flow members. An air inlet and an air outlet are provided on the housing. The plurality of turbulent flow members are staggered between the air inlet and the air outlet. When the flue gas enters from the air inlet, it will sequentially pass through the plurality of turbulent flow members, which is used to change the flow direction of the flue gas to increase the heat exchange times between the flue gas and the heat exchanger, so as to make full use of the waste heat in the flue gas and improve the utilization rate of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is the overall structure diagram of the heat exchanger provided by an embodiment of the present invention;

[0018] Figure 2 is the perspective view of the heat exchanger provided by an embodiment of the present invention;

[0019] Figure 3It is a schematic structural diagram of the housing when the heat exchange module is not assembled according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic structural diagram of the housing when the heat exchange module is assembled according to an embodiment of the present invention;

[0021] Figure 5 It is a structural diagram of the condensation pipe according to an embodiment of the present invention.

[0022] Description of the drawings: 100, heat exchanger; 10, housing; 11, air inlet; 12, air outlet; 13, cover plate; 14, bottom plate; 15, condensation pipe; 151, connecting part; 16, flow guiding plate; 20, turbulent flow channel; 21, first turbulent flow member; 22, second turbulent flow member; 23, third turbulent flow member; 24, fourth turbulent flow member; 25, first compartment; 26, second compartment; 27, third compartment; 28, fourth compartment; 29, fifth compartment; 30, heat exchange assembly; 31, pipe assembly; 32, heat exchange module; 33, sub-module; 40, through hole; 50, connecting hole. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, operations, elements, components and / or their combinations.

[0025] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms. It should be further understood that the term " / and / " used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0026] In addition, the directional terms mentioned in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are only references to the directions of the attached drawings and the usage state of the product. Therefore, the directional terms used are for explaining and understanding the present invention, rather than for limiting the present invention. In addition, in the drawings, structures that are similar or identical are denoted by the same reference numerals.

[0027] See Figures 1 to 5 , Figure 1 is an overall structural diagram of a heat exchanger 100 provided by an embodiment of the present invention; Figure 2 is a perspective view of a heat exchanger 100 provided by an embodiment of the present invention; Figure 3 is a schematic structural diagram of a housing 10 when the heat exchange module 32 is not assembled provided by an embodiment of the present invention; Figure 4 is a schematic structural diagram of a housing 10 when the heat exchange module 32 is assembled provided by an embodiment of the present invention; Figure 5 is a structural diagram of a condensation pipe 15 provided by an embodiment of the present invention. As shown in the figure, the heat exchanger 100 includes a housing 10, a heat exchange component 30, and a plurality of flow disturbing members; an air inlet 11 and an air outlet 12 are respectively provided on two sides of the housing 10; the plurality of flow disturbing members are staggered in the housing 10 and are located between the air inlet 11 and the air outlet 12; the heat exchange component 30 is provided between the plurality of flow disturbing members.

[0028] Specifically, the heat exchanger 100 may include a housing 10, a heat exchange component 30, and a plurality of flow disturbing members. The housing 10 may be a rectangular housing 10, and an accommodation cavity is provided therein for installing the heat exchange component 30 and the flow disturbing members. An air inlet 11 and an air outlet 12 are respectively provided on two sides of the housing 10. For example, the air inlet 11 may be provided on the lower side of the housing 10, and the air outlet 12 may be provided on the upper side of the housing 10. As Figure 3 shown, the air inlet 11 may be provided at the lower left side of the housing 10, and the air outlet 12 may be provided at the upper right side of the housing 10. Then, the flue gas may flow in from the air inlet 11 and flow out from the air outlet 12 after heat exchange in the housing 10. In addition, a guide plate 16 may be provided on one side of the air inlet 11 to facilitate accelerating the entry of the flue gas into the housing 10.

[0029] The plurality of flow disturbing members are staggered in the housing 10 and are used to change the flow direction of the flue gas to increase the number of heat exchange times between the flue gas and the heat exchange component 30, so as to make full use of the waste heat in the flue gas and improve the utilization rate of heat. For example, as Figure 3As shown, a plurality of spoilers can be arranged vertically staggered in the housing 10. After the flue gas enters from the air inlet 11, it needs to pass through each spoiler in turn and then flow out from the air outlet 12. The spoilers can change the flow direction of the flue gas, changing the flow direction of the flue gas from horizontal flow to folded flow. Under the action of the spoilers, the flow of the flue gas will form turbulence, further increasing the heat exchange efficiency. As Figure 4 shown, Figure 4 In Figure 4 , the direction of the arrow is the flow direction of the flue gas. After the flue gas enters the housing 10, it flows along the direction indicated by the arrow in turn until it flows out from the air outlet hole.

[0030] The heat exchange component 30 is mainly used for cold water to pass through. When the cold water flows through the heat exchange component 30, heat exchange occurs between the flue gas and the heat exchange component 30, thereby heating the cold water into hot water, and finally flowing out from the heat exchange component 30 to achieve rapid heating of the cold water.

[0031] In actual use, the cold water flows into one end of the heat exchange component 30 and flows out from the other end of the heat exchange component 30. During this process, the cold water needs to pass through the housing 10. When the cold water flows through the housing 10, the flue gas flows in from the air inlet 11 and flows along the channel formed by the spoiler. During the flow of the flue gas, heat exchange occurs between the flue gas and the heat exchange component 30, thereby heating the cold water into hot water. Due to the existence of the spoiler, the flow path of the flue gas in the housing 10 is greatly increased, so that the heat of the flue gas can be fully utilized to improve the heat exchange efficiency. Finally, the flue gas flows out from the air outlet 12 to complete the heat exchange.

[0032] As a further embodiment, the housing 10 includes a cover plate 13 and a bottom plate 14. The air outlet 12 is provided on one side of the cover plate 13, and the air inlet 11 is provided on the other side of the bottom plate 14 opposite to the cover plate 13.

[0033] Among them, the housing 10 can include a cover plate 13 and a bottom plate 14. As Figure 3 shown, the cover plate 13 and the bottom plate 14 are arranged oppositely. The air inlet 11 is provided on one side of the bottom plate 14, and the air outlet 12 is provided on the other side of the cover plate 13 opposite to the bottom plate 14. For example, the air inlet 11 can be provided at the lower left side of the bottom plate 14, and the air outlet 12 is provided at the upper right side of the cover plate 13. It can be understood that the relative distance between the air inlet 11 and the air outlet 12 needs to be as far as possible to facilitate increasing the flow path of the flue gas in the housing 10. In addition to the Figure 3 arrangement positions shown in Figure 3 , the air inlet 11 can also be arranged on the left side of the housing 10, and the air outlet 12 can be arranged on the right side of the housing 10.

[0034] As a further embodiment, a plurality of the spoiler members are staggered on the cover plate 13 and the bottom plate 14 to form a spoiler channel 20; an inlet of the spoiler channel 20 is communicated with the air inlet 11, and an outlet of the spoiler channel 20 is communicated with the air outlet 12 for allowing flue gas to pass through.

[0035] Among them, a plurality of spoiler members may be vertically staggered on the cover plate 13 and the bottom plate 14 to form a spoiler channel 20. An inlet of the spoiler channel 20 is communicated with the air inlet 11, and an outlet thereof is communicated with the air outlet 12. For example, some spoiler members may be fixed to the bottom plate 14, some spoiler members may be fixed to the cover plate 13, and the spoiler members fixed to the bottom plate 14 and the spoiler members fixed to the cover plate 13 are staggered, thereby forming the spoiler channel 20. As Figure 3 shown, the inlet of the spoiler channel 20 is communicated with the air inlet 11, and the outlet of the spoiler channel 20 is communicated with the air outlet 12. When the flue gas enters from the air inlet 11, it can enter the spoiler channel 20 and then flow along the spoiler channel 20 until it flows out from the air outlet 12.

[0036] The number of the spoiler members can be set according to the model of the heat exchanger 100. Generally, several spoiler members can be provided. When higher heat exchange efficiency is required, the number of the spoiler members can also be increased to more than a dozen or dozens. In addition, the spoiler members may specifically be spoiler plates for adjusting the flow direction of the flue gas.

[0037] As a further embodiment, a plurality of the spoiler members include a first spoiler member 21, a second spoiler member 22, a third spoiler member 23, and a fourth spoiler member 24; the first spoiler member 21 is disposed on one side of the bottom plate 14 and is spaced from the cover plate 13 to form a first compartment 25; the second spoiler member 22 is disposed on the cover plate 13 and is spaced from the first spoiler member 21 to form a second compartment 26; the third spoiler member 23 is disposed on the bottom plate 14 and is spaced from the second spoiler member 22 to form a third compartment 27; the fourth spoiler member 24 is spaced from the third spoiler member 23 to form a fourth compartment 28, and the fourth spoiler member 24 is also spaced from the other side of the bottom plate 14 to form a fifth compartment 29; wherein, the first compartment 25, the second compartment 26, the third compartment 27, the fourth compartment 28, and the fifth compartment 29 are used for allowing the flue gas to pass through in sequence.

[0038] Among them, four spoiler members may be provided, namely a first spoiler member 21, a second spoiler member 22, a third spoiler member 23, and a fourth spoiler member 24. The four spoiler members are staggered on the cover plate 13 and the bottom plate 14. As Figure 3As shown in the figure, the first spoiler 21 is provided on the left side of the bottom plate 14, the second spoiler 22 is arranged at an interval from the first spoiler 21 and fixed on the cover plate 13, the third spoiler 23 is arranged at an interval from the second spoiler 22 and fixed on the bottom plate 14, and the fourth spoiler 24 is arranged at an interval from the third spoiler 23 and fixed on the cover plate 13. Through the above settings, a first compartment 25 can be formed between the first spoiler 21 and the left side of the cover plate 13, a second compartment 26 can be formed between the first spoiler 21 and the second spoiler 22, a third compartment 27 can be formed between the second spoiler 22 and the third spoiler 23, a fourth compartment 28 can be formed between the third spoiler 23 and the fourth spoiler 24, and a fifth compartment 29 can be formed between the fourth spoiler 24 and the extension of the right bottom plate 14.

[0039] When the flue gas flows in from the air inlet 11, it first enters the first compartment 25, then flows to the second compartment 26, then to the third compartment 27, then to the fourth compartment 28, and finally flows to the fifth compartment 29 and flows out from the air outlet 12.

[0040] As a further embodiment, the heat exchange assembly 30 includes a pipe assembly 31 and a heat exchange module 32; the heat exchange module 32 is arranged in the spoiler channel 20 and is provided with a passage for the pipe assembly 31 to pass through; the pipe assembly 31 is arranged in the passage, and one end of the pipe assembly 31 passes through the bottom plate 14 as a water inlet, and the other end of the pipe assembly 31 passes through the cover plate 13 as a water outlet.

[0041] Among them, the heat exchange assembly 30 may include a pipe assembly 31 and a heat exchange module 32. The pipe assembly 31 may include a plurality of copper pipes. The plurality of copper pipes are arranged in the passage of the heat exchange module 32, and the water inlet of each copper pipe passes through the bottom plate 14 and is located outside the housing 10, and the water outlet of each copper pipe passes through the cover plate 13 and is located outside the housing 10.

[0042] During use, cold water enters from the water inlet of the copper pipe, and after exchanging heat with the flue gas in the part of the copper pipe located in the heat exchange module 32, it becomes hot water and flows out from the water outlet of the copper pipe. As Figure 4 shown, Figure 4 the housing 10 in

[0043] As a further embodiment, the heat exchange module 32 includes a plurality of sub-modules 33, and the plurality of sub-modules 33 are sequentially arranged in the first compartment 25, the second compartment 26, the third compartment 27, the fourth compartment 28, and the fifth compartment 29.

[0044] Among them, the heat exchange module 32 may include a plurality of sub-modules 33, and the number of sub-modules 33 may match the number of compartments. For example, asFigure 4 As shown, the heat exchange module 32 may include five sub-modules 33. The first sub-module 33 is located in the first compartment 25, the second sub-module 33 is located in the second compartment 26, the third sub-module 33 is located in the third compartment 27, the fourth sub-module 33 is located in the fourth compartment 28, and the fifth sub-module 33 is located in the fifth compartment 29. The sub-module 33 may include a plurality of fins for improving the heat exchange efficiency. Figure 1 For the convenience of display, only the frame structure of the sub-module 33 is shown, and the fins are not shown.

[0045] As a further embodiment, the first spoiler 21, the second spoiler 22, the third spoiler 23, and the fourth spoiler 24 are all provided with through holes 40 for the pipe assembly 31 to pass through.

[0046] Among them, as Figure 3 shown, through holes 40 for the pipe assembly 31 to pass through may be provided on the cover plate 13, the bottom plate 14, and each spoiler, facilitating the pipe assembly 31 to penetrate the entire housing 10. Thus, cold water can flow into one end of the housing 10, be heated into hot water inside the housing 10, and then flow out from the other end of the housing 10.

[0047] As a further embodiment, the bottom plates 14 in the second compartment 26 and the third compartment 27, and the bottom plates 14 in the fourth compartment 28 and the fifth compartment 29 are respectively provided with a first diversion groove and a second diversion groove, and the first diversion groove and the second diversion groove are connected.

[0048] Among them, a first diversion groove (not marked in the figure) and a second diversion groove (not marked in the figure) may be provided on the bottom plate 14. As Figure 3 shown, a first diversion groove is provided on the bottom plate 14 of the second compartment 26 and the third compartment 27, and a second diversion groove is provided on the bottom plate 14 of the fourth compartment 28 and the fifth compartment 29, and the first diversion groove and the second diversion groove are connected through a connection hole 50 on the third spoiler 23. Both the first diversion groove and the second diversion groove may be formed by opening grooves on the bottom plate 14, and the number of the first diversion grooves and the number of the second diversion grooves may both be multiple. When there are multiple first diversion grooves and multiple second diversion grooves, the multiple first diversion grooves are arranged side by side, and the multiple second diversion grooves are arranged side by side.

[0049] During the heat exchange process of the flue gas, condensed water is generated. The generated condensed water drips onto the bottom plate 14 and finally converges in the first diversion groove and the second diversion groove. The condensed water in the first diversion groove flows into the second diversion groove and flows out from the second diversion groove, thus avoiding corrosion of the housing 10.

[0050] As a further embodiment, a condensation pipeline 15 is provided at the end of the bottom plate 14 relative to the second diversion groove, and the condensation pipeline 15 communicates with the second diversion groove.

[0051] Among them, as Figure 5 shown, the condensation pipeline 15 may be provided with a plurality of connecting parts 151, and each connecting part 151 is used to connect the connecting holes 50 on the housing 10 and communicate with the second diversion groove through the connecting holes 50, so that the condensed water in the second diversion groove can be discharged.

[0052] The present invention also provides a water heater, which includes the heat exchanger 100 described in any one of the above embodiments; the heat exchanger 100 includes a housing 10, a heat exchange component 30 and a plurality of flow disturbing parts; an air inlet 11 and an air outlet 12 are respectively provided on both sides of the housing 10; a plurality of the flow disturbing parts are staggered in the housing 10 and located between the air inlet 11 and the air outlet 12; the heat exchange component 30 is arranged between the plurality of flow disturbing parts.

[0053] Specifically, the heat exchanger 100 may include a housing 10, a heat exchange component 30 and a plurality of flow disturbing parts. The housing 10 may be a rectangular housing 10 with a cavity inside for installing the heat exchange component 30 and the flow disturbing parts. An air inlet 11 and an air outlet 12 are respectively provided on both sides of the housing 10. For example, the air inlet 11 may be provided on the lower side of the housing 10, and the air outlet 12 may be provided on the upper side of the housing 10. As Figure 3 shown, the air inlet 11 may be provided at the lower left side of the housing 10, and the air outlet 12 may be provided at the upper right side of the housing 10. Then, the flue gas can flow in from the air inlet 11, complete heat exchange in the housing 10, and flow out from the air outlet 12. In addition, a guide plate 16 may be provided on one side of the air inlet 11 to facilitate accelerating the entry of the flue gas into the housing 10.

[0054] A plurality of flow disturbing parts are staggered in the housing 10 to change the flow direction of the flue gas to increase the heat exchange times between the flue gas and the heat exchange component 30, so as to make full use of the waste heat in the flue gas and improve the utilization rate of heat. For example, as Figure 3 shown, a plurality of flow disturbing parts may be staggered up and down in the housing 10. Then, after the flue gas enters from the air inlet 11, it needs to pass through each flow disturbing part in turn and then flow out from the air outlet 12. The flow disturbing parts can change the flow direction of the flue gas, change the flow direction of the flue gas from horizontal flow to folded flow, and under the action of the flow disturbing parts, the flow of the flue gas will form turbulence, further increasing the heat exchange efficiency. As Figure 4 shown, Figure 4 the direction of the arrow in is the flow direction of the flue gas. After the flue gas enters the housing 10, it flows along the direction indicated by the arrow in turn until it flows out from the air outlet hole.

[0055] The heat exchange component 30 is mainly used for cold water to pass through. When the cold water flows through the heat exchange component 30, the flue gas exchanges heat with the heat exchange component 30, thereby heating the cold water into hot water, and finally flows out of the heat exchange component 30 to achieve rapid heating of the cold water.

[0056] In actual use, cold water flows into the heat exchange component 30 from one end and flows out from the other end of the heat exchange component 30. During this process, the cold water needs to pass through the shell 10. When the cold water flows through the shell 10, the flue gas flows in from the air inlet 11 and flows along the channel formed by the spoiler. During the flow of the flue gas, the flue gas exchanges heat with the heat exchange component 30, thereby heating the cold water into hot water. Due to the presence of the spoiler, the flow path of the flue gas in the shell 10 is greatly extended, so that the heat of the flue gas can be fully utilized and the heat exchange efficiency can be improved. Finally, the flue gas flows out from the air outlet 12 to complete the heat exchange.

[0057] The heat exchanger and water heater disclosed in the present invention are provided with an air inlet and an air outlet on the shell, and multiple spoilers are staggered between the air inlet and the air outlet. When the flue gas enters from the air inlet, it will pass through the multiple spoilers in sequence, thereby extending the path of the flue gas in the shell, thereby increasing the number of heat exchanges between the flue gas and the heat exchange component, and improving the utilization rate of heat.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A heat exchanger, characterized in that, Applied to a water heater, the heat exchanger includes: A housing, with an air inlet and an air outlet respectively provided on two sides of the housing; A plurality of flow deflectors, which are staggered and arranged inside the housing and located between the air inlet and the air outlet; A heat exchange assembly, which is arranged between the plurality of flow deflectors.

2. The heat exchanger according to claim 1, characterized in that, The housing includes a cover plate and a bottom plate. The air outlet is provided on one side of the cover plate, and the air inlet is provided on the other side of the bottom plate opposite to the cover plate.

3. The heat exchanger according to claim 2, characterized in that, The plurality of flow deflectors are staggered and arranged on the cover plate and the bottom plate to form a flow deflection channel; The inlet of the flow deflection channel is communicated with the air inlet, and the outlet of the flow deflection channel is communicated with the air outlet for the flue gas to pass through.

4. The heat exchanger according to claim 3, wherein The plurality of flow deflectors include a first flow deflector, a second flow deflector, a third flow deflector, and a fourth flow deflector; The first flow deflector is arranged on one side of the bottom plate and is spaced from the cover plate to form a first compartment; The second flow deflector is arranged on the cover plate and is spaced from the first flow deflector to form a second compartment; The third flow deflector is arranged on the bottom plate and is spaced from the second flow deflector to form a third compartment; The fourth flow deflector is spaced from the third flow deflector to form a fourth compartment, and the fourth flow deflector is also spaced from the other side of the bottom plate to form a fifth compartment; Wherein, the first compartment, the second compartment, the third compartment, the fourth compartment, and the fifth compartment are used for the flue gas to pass through in sequence.

5. The heat exchanger according to claim 4, characterized in that, The heat exchange assembly includes a pipe assembly and a heat exchange module; The heat exchange module is arranged in the flow deflection channel and is provided with a passage for the pipe assembly to pass through; The pipe assembly is arranged in the passage. One end of the pipe assembly serves as a water inlet and passes through the bottom plate, and the other end of the pipe assembly serves as a water outlet and passes through the cover plate.

6. The heat exchanger according to claim 5, characterized in that, The heat exchange module includes a plurality of sub-modules, which are sequentially arranged in the first compartment, the second compartment, the third compartment, the fourth compartment, and the fifth compartment.

7. The heat exchanger according to claim 5, characterized in that, The first flow deflector, the second flow deflector, the third flow deflector, and the fourth flow deflector are all provided with through holes for the pipe assembly to pass through.

8. The heat exchanger according to claim 4, wherein, The bottom plates in the second compartment and the third compartment and the bottom plates in the fourth compartment and the fifth compartment are respectively provided with a first diversion groove and a second diversion groove, and the first diversion groove and the second diversion groove are communicated.

9. The heat exchanger according to claim 8, characterized in that A condensation pipe is provided at the end of the bottom plate opposite to the second diversion groove, and the condensation pipe is communicated with the second diversion groove.

10. A water heater, characterized in that, The water heater includes the heat exchanger according to any one of claims 1-9.

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