Heat exchanger baffles, heat exchanger assemblies and gas water heaters

Abstract

This invention relates to heat exchanger components, and discloses a smoke baffle for a heat exchanger, comprising an mounting portion, a bending portion, and a wind-blocking portion. The mounting portion is disposed around the wind-blocking portion, and the bending portion connects the mounting portion and the wind-blocking portion. The wind-blocking portion includes a funnel-shaped inclined surface, a vent, and a condensate drain hole. The vent is located in the middle of the funnel-shaped inclined surface, and the condensate drain hole is located on the funnel-shaped inclined surface. This increases the heat exchange time of stainless steel heat exchangers, improves the heat exchange effect, and provides a condensate drain channel. This invention also discloses a heat exchanger assembly, comprising a heat exchanger, a flue gas heat exchange chamber shell, and the smoke baffle of this invention, exhibiting good heat exchange effect and strong corrosion resistance. Furthermore, this invention also discloses a gas water heater.

Description

Technical Field

[0001] This invention relates to heat exchanger components, specifically to a smoke baffle for a heat exchanger. Furthermore, this invention also relates to a heat exchanger assembly and a gas water heater. Background Technology

[0002] A gas water heater is a gas appliance that produces hot water by burning gas. It heats the water in a heat exchanger by exchanging heat between the high-temperature flue gas produced by combustion and the cold water in the heat exchanger. The heat exchange efficiency of the heat exchanger has a significant impact on the heating efficiency of the gas water heater.

[0003] To improve the heat exchange efficiency of heat exchangers, copper, which has good thermal conductivity, is usually used to make them. However, the exhaust gas produced by combustion of fuel gas contains SO2 and NO. X Corrosive gases, especially when combined with moisture in flue gas, can cause significant corrosion to copper heat exchangers, damaging them and affecting their service life.

[0004] With continuous technological advancements, the manufacturing process of stainless steel heat exchangers has become increasingly mature. Thanks to their excellent corrosion resistance, stainless steel heat exchangers can effectively resist corrosion from corrosive substances, resulting in a longer service life. However, because stainless steel's thermal conductivity is lower than that of materials like copper, under the same structural conditions, the heat exchange performance of stainless steel heat exchangers is inferior to that of copper heat exchangers, affecting the heating efficiency of gas water heaters.

[0005] To compensate for the insufficient heat exchange performance of stainless steel heat exchangers, the heat exchange area is usually increased to improve the heat exchange capacity. However, increasing the heat exchange area significantly increases the weight and structural complexity of the heat exchanger, thus increasing the cost of the gas water heater. Improving the heat exchange efficiency of stainless steel heat exchangers for gas water heaters has become a major technical obstacle to overcome in their application. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a baffle plate for a heat exchanger, which can increase the flue gas resistance of the flue gas heat exchange chamber, increase the heat exchange time of the heat exchanger, and improve the heat exchange effect.

[0007] The technical problem to be further solved by the present invention is to provide a heat exchanger assembly with good heat exchange effect and strong corrosion resistance.

[0008] Another technical problem that this invention aims to solve is to provide a gas water heater that has strong corrosion resistance and good heating effect.

[0009] To address the aforementioned technical problems, the present invention provides a smoke baffle for a heat exchanger, comprising an installation portion, a bending portion, and a wind-blocking portion; the installation portion is disposed around the wind-blocking portion, the bending portion is connected between the installation portion and the wind-blocking portion, the wind-blocking portion includes a funnel-shaped inclined surface, a vent, and a condensate drain hole, the vent is disposed in the middle of the funnel-shaped inclined surface, and the condensate drain hole is disposed on the funnel-shaped inclined surface.

[0010] Preferably, the windbreak is square, and there are four funnel-shaped inclined surfaces, each of which is a trapezoidal plane. The waists of the funnel-shaped inclined surfaces are connected to each other to form a funnel shape. The openings of the funnel-shaped inclined surfaces are connected to the bending portion, and the vents are provided at the bottom of the funnel-shaped inclined surfaces. In this preferred embodiment, the four funnel-shaped inclined surfaces form a square funnel shape, which facilitates the collection of condensate dripping onto the windbreak towards the bottom of the funnel, and its discharge from the condensate drain holes and vents provided on the funnel-shaped inclined surfaces.

[0011] More preferably, the windbreak further includes a windbreak surface disposed at the bottom of the funnel-shaped inclined surface, and the vent is provided on the windbreak surface. This preferred technical solution, by providing a windbreak surface at the bottom of the funnel and a vent on the windbreak surface, can create a gentle airflow, reducing the impact of the airflow on condensate.

[0012] Furthermore, the vent extends from the windbreak surface to the funnel-shaped inclined surfaces on opposite sides. In this preferred embodiment, extending the vent to the windbreak surfaces on both sides increases the vent area and facilitates control of the length of the vent on the funnel-shaped inclined surfaces, thereby controlling the mixing ratio of gas and air.

[0013] Preferably, there are multiple condensate drain holes, which are located at different locations on the funnel-shaped inclined surface. In this preferred embodiment, the multiple condensate drain holes located at different locations on the funnel-shaped inclined surface allow more condensate to flow out, reducing the impact of ventilation airflow on condensate drainage.

[0014] More preferably, the condensate drain holes are divided into multiple groups, with each group of condensate drain holes positioned at different locations on the funnel-shaped inclined surface. This preferred technical solution allows for better condensate drainage while avoiding the negative impact of excessive condensate drain holes on the strength of the windbreak.

[0015] Preferably, the bent portion is formed as a bend that faces away from the bottom of the funnel-shaped inclined surface and has a condensate drain. This preferred technical solution allows condensate collected on the flue gas heat exchange chamber shell to flow into the condensate drain and be discharged through it, further reducing the amount of condensate discharged through the vents.

[0016] More preferably, the bottom of the condensate tank is provided with a condensate drain outlet. In this preferred embodiment, the condensate collected in the condensate tank can be discharged through the condensate drain outlet at the bottom of the condensate tank, facilitating the centralized discharge of condensate.

[0017] Preferably, the bent portion is formed as a bend towards the bottom of the funnel-shaped inclined surface. This preferred technical solution increases the volume of the cavity between the smoke baffle and the flue gas heat exchange chamber shell, thereby improving the combustion performance of the fuel gas.

[0018] A second aspect of the present invention provides a heat exchanger assembly, including a heat exchanger, a flue gas heat exchange chamber shell, and a baffle plate for the heat exchanger provided in the first aspect of the present invention. The heat exchanger is installed inside the flue gas heat exchange chamber shell, and the baffle plate for the heat exchanger is installed below the flue gas heat exchange chamber shell and fixed at the air inlet of the flue gas heat exchange chamber shell by the mounting part.

[0019] Preferably, the heat exchanger includes heat exchange plates and heat exchange tubes, both of which are made of stainless steel. In this preferred embodiment, the stainless steel heat exchange plates and tubes have stronger corrosion resistance. Furthermore, the use of a baffle plate in the heat exchanger improves the heat exchange performance of the stainless steel heat exchange plates and tubes, ensuring the heat exchange effect of the heat exchanger.

[0020] A third aspect of the present invention provides a gas water heater, including the heat exchanger assembly provided in the second aspect of the present invention.

[0021] Through the above technical solution, the baffle plate for the heat exchanger of the present invention can block the air inlet of the flue gas heat exchange chamber, increasing the flow resistance of the flue gas generated by gas combustion, reducing the flow velocity of the flue gas, increasing the heat exchange time between the flue gas and the heat exchanger, and improving the heat exchange effect. It also facilitates the collection and discharge of condensate generated during the heat exchange process, preventing damage to the heat exchanger and leakage of condensate. The heat exchanger assembly of the present invention, by using the baffle plate to block the airflow at the air inlet of the heat exchanger, slows down the flow velocity of the high-temperature flue gas, increases the contact time between the high-temperature flue gas and the heat exchanger, and improves the heat exchange effect; it also achieves optimized discharge of condensate generated by the heat exchanger and improves the corrosion resistance of the heat exchanger. The gas water heater provided by the present invention has a better heat exchange effect and higher gas utilization rate.

[0022] Other technical features and effects of the present invention will be further described in the detailed embodiments below. Attached Figure Description

[0023] Figure 1 This is a top view of one embodiment of the smoke baffle of the present invention;

[0024] Figure 2 This is a front view of an embodiment of the smoke baffle of the present invention;

[0025] Figure 3 This is a side view of one embodiment of the smoke baffle of the present invention;

[0026] Figure 4 This is a perspective view of one embodiment of the smoke baffle of the present invention;

[0027] Figure 5 This is a schematic diagram of one embodiment of the heat exchanger assembly of the present invention;

[0028] Figure 6 This is a partial cross-sectional view of an embodiment of the heat exchanger assembly of the present invention;

[0029] Figure 7 yes Figure 6 Enlarged view of part A in the middle;

[0030] Figure 8 This is a top view of another embodiment of the smoke baffle of the present invention;

[0031] Figure 9 This is a perspective view of another embodiment of the smoke baffle of the present invention;

[0032] Figure 10 This is a front view of another embodiment of the smoke baffle of the present invention;

[0033] Figure 11 This is a schematic diagram of another embodiment of the heat exchanger assembly of the present invention;

[0034] Figure 12 This is a partial cross-sectional view of another embodiment of the heat exchanger assembly of the present invention;

[0035] Figure 13 yes Figure 12 Enlarged view of part B in the middle section.

[0036] Explanation of reference numerals in the attached figures

[0037] 1. Mounting section 11. Mounting holes

[0038] 12 Install the flange 2 bending section

[0039] 21 Condensate tank 22 Condensate drain outlet

[0040] 3 Windbreak section 31 Funnel slope

[0041] 32 Vent opening; 33 Condensate drain hole

[0042] 34 Windproof surface 4 Flue gas heat exchanger shell Detailed Implementation

[0043] In this invention, unless otherwise stated, the directional terms such as "up" and "down" indicate the orientation or positional relationship of the described device or component in its actual use.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, the term "connection" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention, and the scope of protection of the present invention is not limited to the specific embodiments described below.

[0046] like Figures 1 to 13As shown, one embodiment of the heat exchanger baffle of the present invention includes a mounting part 1, a bending part 2, and a wind-blocking part 3. The mounting part 1 is disposed around the wind-blocking part 3 and has a frame-shaped structure with a planar main body. Multiple mounting holes 11 are provided around the periphery of the mounting part 1 for mounting on the flue gas heat exchange chamber shell 4 through the mounting holes 11. The outer edge of the mounting part 1 may also be provided with opposing mounting flanges 12 to better position and install the mounting part 1 on the flue gas heat exchange chamber shell. The wind-blocking part 3 is disposed within the frame-shaped structure of the mounting part 11 and is connected to the mounting part 1 by the bending part 2. The heat exchanger baffle of the present invention is made of a high-temperature resistant material, which can prevent damage to the baffle caused by flue gas generated from gas combustion. Specific materials may include, but are not limited to, stainless steel. The mounting part 1, bending part 2, and wind-blocking part 3 of the heat exchanger baffle of the present invention can be integrally formed or formed separately and then connected together. The windbreak section 3 includes a funnel-shaped inclined surface 31, a vent 32, and a condensate drain hole 33. The upper edge of the funnel-shaped inclined surface 31 is connected to the bending section 2, and the lower part of the funnel-shaped inclined surface 31 forms the vent 32, which can receive the condensate generated during the heat exchange process of the condensing water heater and allow the condensate to collect at the vent 32 under the action of gravity. The vent 32 is located in the middle of the windbreak section 3, forming the air inlet of the flue gas heat exchange chamber. In this way, the windbreak section 3 forms a Venturi structure within the flue gas heat exchange chamber, resulting in a lower flue gas velocity and a longer contact time between the flue gas and the heat exchanger. This allows for a longer heat exchange between the flue gas and the water in the heat exchanger, and the water absorbs the heat generated by the combustion of the gas more fully. However, excessive obstruction of the air inlet can also reduce the air intake, affecting the complete combustion of the gas and reducing the exhaust performance. A condensate drain hole 33 is provided on the funnel-shaped inclined surface 31, which allows some condensate to be discharged from the flue gas heat exchange chamber, while other condensate is discharged through the vent 32. This prevents condensate from accumulating in the flue gas heat exchange chamber and causing corrosion to the heat exchanger and other components of the gas water heater.

[0047] In some embodiments of the heat exchanger baffle of the present invention, such as Figure 1 , Figure 4 , Figure 8 and Figure 9As shown, the heat exchanger baffle of the present invention is rectangular, similar in cross-sectional shape to that of a typical gas water heater flue gas heat exchange chamber. The baffle portion 3 is also rectangular, with four funnel-shaped inclined surfaces 31. Each of the four funnel-shaped inclined surfaces 31 is a trapezoidal plane of equal height, with two of them being trapezoids of the same shape but with longer bases, and the other two being trapezoids of the same shape but with shorter bases. The waists of the four funnel-shaped inclined surfaces 31 are connected to form a square funnel shape. Condensate guide channels can also be formed at the connecting parts of the different funnel-shaped inclined surfaces 31 to better guide condensate to the bottom of the funnel-shaped inclined surfaces. The opening of the funnel-shaped inclined surface 31 is connected to the bending portion 2, and a vent 32 is provided at the bottom of the funnel-shaped inclined surface 31. The vent 32 can be formed directly from the bottom edges of the four funnel-shaped inclined surfaces 31, or it can be formed by installing a structure with vent 32 on the bottom edges of the funnel-shaped inclined surfaces 31. The square funnel-shaped channel formed by four trapezoidal planar funnel-shaped inclined surfaces 31 can better match the flue gas heat exchange chamber of the gas water heater, and is also easier to process.

[0048] In some embodiments of the heat exchanger baffle of the present invention, such as Figure 1-4 , Figure 8 and Figure 9 As shown, a windbreak surface 34 is provided at the bottom of the funnel-shaped inclined surface 31. The windbreak surface 34 is a rectangular plane. A vent 32 is provided on the windbreak surface 34. The vent 32 can be configured as a rectangular opening aligned with the length of the windbreak surface 34. The periphery of the windbreak surface 34 is connected to the bottom of the funnel-shaped inclined surface 31, and a condensate drainage channel can be provided at the connection point to guide the flow of condensate and discharge it from a specific location in the windbreak section 3.

[0049] As a specific embodiment of the heat exchanger baffle of the present invention, such as Figure 1 , Figure 3-5 , Figure 8-9 , Figure 11 As shown, the vent 32 extends along the length of the windbreak surface 34 and connects to the funnel-shaped inclined surfaces 31 on opposite sides, forming a vent 32 spanning the windbreak surface 34 and the funnel-shaped inclined surfaces 31 on opposite sides of the windbreak surface 34. The length of the vent 32 on the funnel-shaped inclined surfaces 31 on both sides can be controlled to control the airflow entering the flue gas heat exchange chamber through the vent 32. In a typical gas water heater, the gas combustion chamber and the flue gas heat exchange chamber are the same chamber. Controlling the airflow through the vent 32 can not only control the mixing ratio of air and gas in the flue gas heat exchange chamber, but also control the flow velocity of the flue gas, achieving a balance between heat exchange and exhaust gas emissions.

[0050] In some embodiments of the heat exchanger baffle of the present invention, such as Figure 1 , Figure 4 , Figure 8 and Figure 9 As shown, multiple condensate drain holes 33 are provided on the funnel-shaped inclined surface 31. These multiple condensate drain holes 33 can be set at different parts of the funnel-shaped inclined surface 31 so that condensate can be drained from different parts of the funnel-shaped inclined surface 31 to prevent the accumulation of condensate.

[0051] As a specific embodiment of the heat exchanger baffle of the present invention, such as Figure 1 , Figure 4 , Figure 8 and Figure 9 As shown, the condensate drain holes 33 are divided into multiple groups. The condensate drain holes 33 in each group are set in the same area on the funnel-shaped inclined surface 31. The condensate drain holes 33 in different groups are set in different positions on the funnel-shaped inclined surface 31 so as to achieve full discharge of condensate from specific parts.

[0052] In some embodiments of the heat exchanger baffle of the present invention, such as Figure 9-13 As shown, the bending portion 2 is bent in a direction entirely away from the bottom of the funnel-shaped inclined surface 31, so that in the use state, the part where the funnel-shaped inclined surface 31 connects to the bending portion 2, that is, the opening of the funnel-shaped inclined surface 31, is higher than the mounting portion 1. Furthermore, the part where the bending portion 2 connects to the mounting portion 1 is bent downwards to form a condensate tank 21 for collecting condensate generated at the connection between the heat exchanger baffle and the flue gas heat exchange chamber shell 4. The condensate tank 21 can guide the collected condensate to a specific location for discharge. The condensate tank 21 on the bending portion 2 occupies a certain amount of the air inlet area of ​​the flue gas heat exchange chamber, which usually leads to an increase in flue gas emission resistance, but helps to improve the heat exchange effect.

[0053] As a specific embodiment of the heat exchanger baffle of the present invention, such as Figure 9-13 As shown, a condensate drain outlet 22 is provided at the bottom of the condensate tank 21. Multiple condensate drain outlets 22 can be provided, such as ten condensate drain outlets 22 on the condensate tank 21. The ten condensate drain outlets 22 can be symmetrically arranged on the condensate tank 21 or evenly arranged on the condensate tank 21.

[0054] In some embodiments of the heat exchanger baffle of the present invention, such as Figure 2-7 The bending portion 2 shown is formed with a bend towards the bottom of the funnel-shaped inclined surface 31, so that in the usage state, the part where the funnel-shaped inclined surface 31 connects to the bending portion 2, that is, the opening of the funnel-shaped inclined surface 31, is lower than the mounting portion 1. Thus, in the installed state, the volume of the flue gas heat exchange chamber is larger, and the combustion effect of the gas is better. At this time, the condensate generated at the connection between the heat exchanger baffle and the flue gas heat exchange chamber shell 4 will flow along the downwardly bent portion 2 to the funnel-shaped inclined surface 31, preventing the accumulation of condensate.

[0055] One embodiment of the heat exchanger assembly of the present invention, such as Figures 5 to 7 , Figures 11 to 13 As shown, the system includes a heat exchanger, a flue gas heat exchange chamber shell 4, and a baffle plate for the heat exchanger according to any embodiment of the present invention. The heat exchanger is installed inside the flue gas heat exchange chamber shell 4, which has an air inlet and an air outlet. High-temperature flue gas generated by combustion enters the flue gas heat exchange chamber through the air inlet of the shell 4, exchanges heat with the heat exchanger inside, and heats the cold water in the heat exchanger. The exhaust gas after heat exchange is discharged through the air outlet of the shell 4. The baffle plate is installed at the air inlet below the flue gas heat exchange chamber shell 4 via a mounting part 1, keeping the baffle surface 34 below the mounting part 1. Specifically, screws can be used to fix the baffle plate to the flue gas heat exchange chamber shell 4 through the mounting holes 11. When the mounting part 1 has a mounting baffle 12, the mounting baffle 12 can be snapped onto the outside of the flue gas heat exchange chamber shell 4. This allows high-temperature flue gas to enter the air inlet of the flue gas heat exchange chamber shell 4 through the vent 32, increasing the flow resistance of the high-temperature flue gas, slowing down its flow velocity, and increasing the contact time between the high-temperature flue gas and the heat exchanger, thus improving the heat exchange effect. In addition, the condensate generated in the heat exchange chamber can be discharged promptly through structures such as the condensate drain hole 33, condensate tank 21, and condensate drain outlet 22, improving the corrosion resistance of the heat exchanger components.

[0056] In some embodiments of the heat exchanger assembly of the present invention, the heat exchanger includes heat exchange fins and heat exchange tubes, both of which are formed of stainless steel. Different types of stainless steel can be used for the heat exchange fins and heat exchange tubes to further improve the heat exchanger's processing performance and corrosion resistance.

[0057] Through the above technical solution, the smoke baffle for the heat exchanger of the present invention is installed at the lower end of the flue gas heat exchange chamber shell 4 of the gas water heater via the mounting part 1. The combustion of gas in the gas water heater produces high-temperature flue gas, which enters the heat exchange area where the heat exchanger is located and exchanges heat with the water flowing in the heat exchanger, thereby heating the water to the temperature required by the user. The air inlet channel of the windproof part 3 of the smoke baffle for the heat exchanger of the present invention forms a funnel-shaped Venturi structure, so the gas flow velocity is faster at the vent 32 and slower in the heat exchange area of ​​the heat exchanger, thereby prolonging the heat exchange time of the high-temperature flue gas in the heat exchange area of ​​the heat exchanger and improving the heat exchange effect. For condensing water heaters, condensate is generated during the heat exchange process. The condensate accumulates in the heat exchanger, causing the water heater exhaust gas to fail to meet standards; it also absorbs corrosive gases in the exhaust gas, causing excessive corrosion to the heat exchanger and shortening its service life; furthermore, the positive pressure in the heat exchange area of ​​the heat exchanger can easily cause condensate to seep out from the weak points of the heat exchanger's seal, corroding other components of the water heater. Therefore, the heat exchanger baffle of the present invention has a condensate drain hole 33 on the funnel-shaped inclined surface. In the preferred embodiment of the heat exchanger baffle of the present invention, other condensate drain structures are also provided to facilitate condensate drain and ensure that the condensate during the heat exchange process can be drained out of the heat exchanger in a timely manner.

[0058] The heat exchanger assembly of this invention features a baffle plate installed at the air inlet of the flue gas heat exchange chamber shell 4. This ensures that the high-temperature flue gas generated by combustion can only enter the flue gas heat exchange chamber through the vent 32, increasing the flow resistance of the high-temperature flue gas, slowing its flow velocity, and increasing the contact time between the high-temperature flue gas and the heat exchanger, thereby improving the heat exchange effect. The inclusion of condensate drain holes 33, condensate tanks 21, and condensate drain outlets 22, along with the use of a stainless steel heat exchanger, effectively improves the corrosion resistance of the heat exchanger.

[0059] The gas water heater provided by this invention uses the heat exchanger assembly of this invention. The heat exchanger has strong corrosion resistance, good heat exchange effect, and high gas utilization rate.

[0060] In the description of this invention, references to terms such as "one embodiment," "some embodiments," and "a specific implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this invention, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. However, these simple modifications and combinations should also be considered as part of the content disclosed in this invention and are all within the protection scope of this invention.

Claims

1. A smoke baffle for a heat exchanger, characterized in that, It includes an installation part (1), a bending part (2), and a windproof part (3); the installation part (1) is disposed around the windproof part (3), the bending part (2) is connected between the installation part (1) and the windproof part (3), the windproof part (3) includes a funnel-shaped inclined surface (31), a vent (32), and a condensate drain hole (33), the vent (32) is disposed in the middle of the funnel-shaped inclined surface (31), and the condensate drain hole (33) is disposed on the funnel-shaped inclined surface (31); the bending part (2) is formed as a bend facing away from the bottom of the funnel-shaped inclined surface (31) and has a condensate tank (21); the bottom of the condensate tank (21) is provided with a condensate drain hole (22).

2. The smoke baffle for a heat exchanger according to claim 1, characterized in that, The windbreak (3) is square, and there are four funnel-shaped inclined surfaces (31). All four funnel-shaped inclined surfaces (31) are trapezoidal planes. The waists of the funnel-shaped inclined surfaces (31) are connected to each other to form a funnel shape. The opening of the funnel-shaped inclined surface (31) is connected to the bending part (2). The bottom of the funnel-shaped inclined surface (31) is provided with the ventilation opening (32).

3. The smoke baffle for a heat exchanger according to claim 2, characterized in that, The windproof part (3) further includes a windproof surface (34), which is located at the bottom of the funnel-shaped inclined surface (31), and the ventilation opening (32) is provided on the windproof surface (34).

4. The smoke baffle for a heat exchanger according to claim 3, characterized in that, The vent (32) extends from the windproof surface (34) to the funnel-shaped ramps (31) on opposite sides.

5. The smoke baffle for a heat exchanger according to claim 1, characterized in that, There are multiple condensate drain holes (33), and the multiple condensate drain holes (33) are located at different positions on the funnel-shaped inclined surface (31).

6. The smoke baffle for a heat exchanger according to claim 5, characterized in that, The condensate drain hole (33) is divided into multiple groups, and each group of condensate drain holes (33) is located at different positions on the funnel-shaped inclined surface (31).

7. A heat exchanger assembly comprising a heat exchanger, a flue gas heat exchange chamber housing (4), and a baffle plate for the heat exchanger as claimed in any one of claims 1-6, wherein the heat exchanger is installed inside the flue gas heat exchange chamber housing (4), and the baffle plate for the heat exchanger is installed below the flue gas heat exchange chamber housing (4) and fixed at the air inlet of the flue gas heat exchange chamber housing (4) by the mounting portion.

8. The heat exchanger assembly according to claim 7, characterized in that, The heat exchanger includes heat exchange plates and heat exchange tubes, both of which are made of stainless steel.

9. A gas water heater, characterized in that, Includes the heat exchanger assembly as described in claim 7 or 8.

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