WO2021239013A1 - Smoke baffle plate for heat exchanger, heat exchanger assembly, and gas water heater - Google Patents

Abstract

Disclosed are a smoke baffle plate for a heat exchanger, a heat exchanger assembly and a gas water heater. The smoke baffle plate for a heat exchanger comprises a mounting portion (1), a bending portion (2) and a wind shield portion (3), wherein the mounting portion (1) is arranged around the wind shield portion (3); the bending portion (2) is connected between the mounting portion (1) and the wind shield portion (3); and the wind shield portion (3) comprises a funnel-shaped inclined face (31), a ventilation opening (32), and a condensed water discharge hole (33), with the ventilation opening (32) being provided in the middle of the funnel-shaped inclined face (31), and the condensed water discharge hole (33) being provided in the funnel-shaped inclined face (31). The heat exchanger assembly comprises a heat exchanger, a smoke heat exchange chamber housing (4), and the smoke baffle plate for a heat exchanger. The gas water heater comprises the heat exchanger assembly. The present solution can prolong the heat exchange time of a stainless steel heat exchanger, improve the heat exchange effect and corrosion resistance, and provide a condensed water discharge channel.

Description

Smoke shield for heat exchanger, heat exchanger assembly and gas water heater

Cross-references to related applications

This application claims the rights and interests of the Chinese patent application 202010455584.7 filed on May 26, 2020. The content of this application is incorporated into this application by reference.

Technical field

The invention relates to a heat exchanger accessory, in particular to a smoke shield for a heat exchanger. In addition, the present invention also relates to a heat exchanger assembly and a gas water heater.

Background technique

A gas water heater is a gas appliance that obtains hot water by burning gas. It heats the cold water in the heat exchanger by exchanging heat between the high-temperature flue gas produced by the combustion of the gas and the cold water in the heat exchanger. The heat exchange effect of the heat exchanger has a great influence on the heating efficiency of the gas water heater.

In order to improve the heat exchange effect of the heat exchanger, the heat exchanger is usually made of copper with better thermal conductivity. However, the exhaust gas produced by gas combustion contains corrosive gases such as SO2, NOX, etc., especially when combined with the moisture in the flue gas, it will form a greater corrosive effect on the copper heat exchanger, causing the heat exchanger to be damaged. Damage, affecting the service life of the copper heat exchanger.

With the continuous advancement of technology, the manufacturing process of stainless steel heat exchangers has become more and more mature. With the excellent corrosion resistance of stainless steel heat exchangers, it can better resist the corrosion of corrosive substances, so the heat exchange made of stainless steel is used. The device can obtain a long service life. However, because the thermal conductivity of stainless steel itself is not as good as copper and other materials, under the same structure, the heat exchange performance of stainless steel heat exchangers is worse than that of copper heat exchangers, which affects the heating efficiency of gas water heaters.

In order to make up for the lack of heat exchange performance of stainless steel heat exchangers, the heat exchange area is usually increased to increase the heat exchange heat of the heat exchanger, but the increase in the heat exchange area will greatly increase the weight and structural complexity of the heat exchanger, and increase the The cost of gas water heaters. How to improve the heat exchange effect of stainless steel heat exchangers for gas water heaters has become the main technical obstacle to be overcome in the application of stainless steel heat exchangers.

Summary of the invention

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

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

The technical problem to be solved by the present invention is to provide a gas water heater with strong corrosion resistance and good heating effect.

In order to solve the above technical problems, one aspect of the present invention provides a smoke shield for a heat exchanger, which includes a mounting part, a bending part and a wind shield; the mounting part is arranged around the wind shield, and the folding The bent portion is connected between the mounting portion and the windshield, and the windshield includes a funnel-shaped slope, a vent, and a condensate drain hole. The vent is provided in the middle of the funnel-shaped slope, so The condensate drain hole is provided on the funnel-shaped inclined surface.

Preferably, the windshield is square, the funnel-shaped slope has four pieces, the four funnel-shaped slopes are all trapezoidal planes, the waists of the funnel-shaped slopes are connected to each other to form a funnel shape, and the funnel-shaped slopes The mouth of the vent is connected with the bent portion, and the bottom of the funnel-shaped slope is provided with the vent. In this preferred technical solution, the four funnel-shaped slopes are enclosed in a square funnel shape, so that the condensate dripping on the windshield can be concentrated to the bottom of the funnel, from the condensate drain holes and vents provided on the funnel-shaped slope. discharge.

Further preferably, the windshield portion further includes a windshield surface, the windshield surface is arranged at the bottom of the funnel-shaped inclined surface, and the air vent is arranged on the windshield surface. Through this preferred technical solution, a windshield surface is provided on the bottom of the funnel, and a vent is provided on the windshield surface, which can form a gentle ventilation airflow and reduce the influence of the ventilation airflow on the condensed water.

Further, the vents extend from the windshield surface to the funnel-shaped slopes on opposite sides. In this preferred technical solution, the vents extending to the windshield surfaces on both sides can increase the area of the vents, and at the same time, it is convenient to control the length of the vents on the funnel-shaped slope to control the mixing ratio of gas and air.

Preferably, there are a plurality of the condensation water discharge holes, and the plurality of the condensation water discharge holes are arranged at different positions on the funnel-shaped inclined surface. In this preferred technical solution, a plurality of condensate discharge holes provided at different positions on the funnel-shaped slope can make more condensate water flow out of the condensate discharge holes, and reduce the influence of the ventilation air flow on the condensate discharge.

Further preferably, the condensate water discharge holes are divided into multiple groups, and the condensate water discharge holes of each group are arranged at different positions on the funnel-shaped inclined surface. Through this preferred technical solution, the grouped condensate water discharge holes can better discharge the condensate water while avoiding the influence of too many condensate water discharge holes on the strength of the windshield.

Preferably, the bent portion is formed as a bend that faces the bottom of the funnel-shaped inclined surface as a whole, and is formed with a condensed water groove. Through this preferred technical solution, the condensed water condensed on the shell of the flue gas heat exchange cavity can be caused to flow into the condensate water tank and be discharged through the condensate water tank, further reducing the amount of condensed water discharged through the vent.

Further preferably, a condensate drain is provided at the bottom of the condensate tank. In this preferred technical solution, the condensate water collected in the condensate water tank can be discharged through the condensate water discharge port at the bottom of the condensate water tank, which facilitates the concentrated discharge of the condensate water.

Preferably, the bent portion is formed as a bend toward the bottom of the funnel-shaped slope. Through this preferred technical solution, the volume of the cavity between the smoke baffle plate and the flue gas heat exchange cavity shell of the present invention can be increased, and the combustion performance of the gas can be improved.

The second aspect of the present invention provides a heat exchanger assembly, including a heat exchanger, a flue gas heat exchange cavity shell, and the smoke shield for the heat exchanger provided in the first aspect of the present invention, and the heat exchanger is installed on the In the flue gas heat exchange cavity shell, the heat exchanger smoke shield is installed under the flue gas heat exchange cavity shell, and is fixed at the air inlet of the flue gas heat exchange cavity shell by the mounting portion .

Preferably, the heat exchanger includes heat exchange fins and heat exchange tubes, and both the heat exchange fins and the heat exchange tubes are formed of stainless steel. In this preferred technical solution, the stainless steel heat exchange fins and heat exchange tubes have stronger corrosion resistance. At the same time, the use of smoke shields for heat exchangers improves the heat exchange performance of the stainless steel heat exchange fins and stainless steel heat exchange tubes. Ensure the heat exchange effect of the heat exchanger.

The 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.

Through the above technical solutions, the smoke baffle for heat exchangers of the present invention can shield the air inlet of the flue gas heat exchange cavity, increase the flow resistance of the flue gas generated by gas combustion, reduce the flow velocity of the flue gas, and increase the flue gas The heat exchange time with the heat exchanger improves the heat exchange effect. And it is convenient to collect and discharge the condensed water generated in the heat exchange process, and prevent the damage of condensed water to the heat exchanger and the leakage of condensed water. In the heat exchanger assembly of the present invention, the airflow at the air inlet of the heat exchanger is shielded by the smoke shield for the heat exchanger of the present invention, which slows down the flow rate of high-temperature flue gas and improves the contact between the high-temperature flue gas and the heat exchanger Time, the heat exchange effect of the heat exchanger is good; the optimized discharge of the condensate generated by the heat exchanger is realized, and the corrosion resistance of the heat exchanger is improved. With the gas water heater provided by the present invention, the heat exchange effect of the heat exchanger is better, and the utilization rate of gas is higher.

Other technical features and technical effects of the present invention will be further described in the following specific embodiments.

Description of the drawings

Figure 1 is a top view of an embodiment of the smoke shield of the present invention;

Figure 2 is a front view of an embodiment of the smoke shield of the present invention;

Figure 3 is a side view of an embodiment of the smoke shield of the present invention;

Figure 4 is a perspective schematic view of an embodiment of the smoke shield of the present invention;

Figure 5 is a schematic diagram of an embodiment of the heat exchanger assembly of the present invention;

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

Figure 7 is a partial enlarged view of part A in Figure 6;

Figure 8 is a top view of another embodiment of the smoke shield of the present invention;

Figure 9 is a perspective schematic view of another embodiment of the smoke shield of the present invention;

Figure 10 is a front view of another embodiment of the smoke shield of the present invention;

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

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

Fig. 13 is a partial enlarged view of part B in Fig. 12.

Description of Reference Signs

1 Installation Department 11 Installation holes

12 Install the ribs 2 Bending part

21 Condensate water tank 22 Condensate drain

3 Windshield part 31 Funnel slope

32 Ventilation holes 33 Condensate drain holes

34 Windshield side 4 Flue gas heat exchange cavity shell

Detailed ways

In the present invention, unless otherwise stated, the orientation or positional relationship indicated by the used orientation words such as "up, down" is the orientation or positional relationship of the described device or component in actual use.

In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, the term "connection" can be a fixed connection or a detachable connection. The connection may be an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be a communication between two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood according to specific situations.

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 here are only used to illustrate and explain the present invention, and the scope of protection of the present invention is not limited to the following specific embodiments. .

As shown in FIGS. 1 to 13, an embodiment of the smoke shield for heat exchangers of the present invention includes a mounting portion 1, a bending portion 2 and a wind shield 3. The mounting part 1 is arranged around the windshield part 3 and has a frame-shaped structure whose main body is a plane. A plurality of mounting holes 11 are provided on the periphery of the mounting portion 1 to be mounted on the flue gas heat exchange cavity shell 4 through the mounting holes 11. The outer edge of the installation part 1 may also be provided with opposite installation ribs 12, so that the installation part 1 can be better positioned and installed on the flue gas heat exchange cavity shell. The windshield part 3 is arranged in the frame structure of the mounting part 11 and is connected to the mounting part 1 through the bending part 2. The smoke baffle for the heat exchanger of the present invention is made of high temperature resistant materials, which can prevent the smoke generated by the combustion of gas from causing damage to the smoke baffle. The specific manufacturing material can be but not limited to stainless steel. The mounting part 1, the bending part 2 and the wind shielding part 3 of the smoke shield for heat exchangers of the present invention can be integrally formed, or they can be formed separately and connected together. The wind shield 3 includes a funnel-shaped slope 31, a vent 32, and a condensate drain hole 33. The upper edge of the funnel-shaped slope 31 is connected to the bending part 2, and the lower part of the funnel-shaped slope 31 is formed with a vent 32, which can receive condensation. The condensed water generated in the heat exchange process of the type water heater causes the condensed water to collect at the vent 32 under the action of gravity. The vent 32 is located in the middle of the windshield part 3 and forms the air inlet of the flue gas heat exchange cavity. In this way, the windshield part 3 forms a venturi structure in the flue gas heat exchange cavity, so the flue gas heat exchange cavity The flow rate of the flue gas inside is low, and the contact time between flue gas and the heat exchanger is longer, so that the flue gas and the water in the heat exchanger can exchange heat for a longer time, and the water absorbs the heat generated by the combustion of gas. More fully. However, excessive shielding of the air inlet will also cause a decrease in the air intake volume, affect the full combustion of the gas, and reduce the exhaust emission performance. The funnel-shaped inclined surface 31 is provided with a condensed water discharge hole 33, and part of the condensed water can be discharged out of the flue gas heat exchange cavity through the condensed water discharge hole 33, and part of the condensed water can be discharged through the vent 32. Prevent condensed water from accumulating in the flue gas heat exchange cavity, causing corrosion to the heat exchanger and other parts of the gas water heater.

In some embodiments of the smoke shield for the heat exchanger of the present invention, as shown in Figure 1, Figure 4, Figure 8 and Figure 9, the smoke shield for the heat exchanger of the present invention is rectangular, which is similar to the flue gas of a normal gas water heater. The cross-sectional shape of the heat exchange cavity is similar. The windshield 3 is also rectangular. There are four funnel-shaped slopes 31. The four funnel-shaped slopes 31 are trapezoidal planes with equal heights. Two of them are trapezoids with the same shape and a long bottom side, and the other two have the same shape. A trapezoid with a shorter bottom edge. The waists of the four funnel-shaped slopes 31 are connected to each other to form a square funnel. Condensation water diversion grooves may be formed at the connection parts of the different funnel-shaped slopes 31 to better guide the condensate water to the bottom of the funnel-shaped slopes. The mouth of the funnel-shaped slope 31 is connected to the bending part 2, and the bottom of the funnel-shaped slope 31 is provided with a vent 32. The vent 32 can be directly formed by the bottom side of the four funnel-shaped slopes 31, or it can be formed by installing the vent 32 on the bottom side of the funnel-shaped slope 31. The square funnel-shaped channel formed by the four trapezoidal planar funnel-shaped slopes 31 can better match the flue gas heat exchange cavity of the gas water heater, and the processing is more convenient.

In some embodiments of the smoke shield for heat exchangers of the present invention, as shown in FIGS. 1-4, 8 and 9, a windshield surface 34 is provided at the bottom of the funnel-shaped inclined surface 31, and the windshield surface 34 is rectangular Plane. The vent 32 is provided on the windshield surface 34. The vent 32 may be provided as a rectangular opening consistent with the length of the windshield surface 34. The periphery of the windshield surface 34 is connected to the bottom of the funnel-shaped inclined surface 31, and the connection part can also be provided with a condensate water diversion groove to guide the flow of condensate water and discharge it from a specific position of the windshield 3.

As a specific embodiment of the smoke shield for a heat exchanger of the present invention, as shown in Figures 1, Figures 3-5, Figures 8-9, and Figure 11, the vent 32 penetrates the windshield surface 34 on the windshield surface 34 It extends to the funnel-shaped slopes 31 on the opposite sides connected to it, forming a vent 32 that spans the windshield 34 and the funnel-shaped slopes 31 on the opposite sides of the windshield 34. The length of the vents 32 provided on the funnel-shaped slopes 31 on both sides can be controlled to control the amount of air entering the flue gas heat exchange cavity through the vents 32. The gas combustion cavity and the flue gas heat exchange cavity of a common gas water heater are the same cavity. The control of the air volume through the vent 32 can not only control the mixing ratio of air and gas in the flue gas heat exchange cavity, but also Control the flow rate of flue gas to achieve a balance between heat exchange and exhaust emissions.

In some embodiments of the smoke shield for a heat exchanger of the present invention, as shown in Figure 1, Figure 4, Figure 8 and Figure 9, the condensate drain hole 33 on the funnel-shaped slope 31 is provided with multiple, multiple condensing The water discharge holes 33 may be provided at different positions on the funnel-shaped inclined surface 31 so as to drain the condensed water from different positions on the funnel-shaped inclined surface 31 to prevent the accumulation of condensed water.

As a specific embodiment of the smoke shield for heat exchanger of the present invention, as shown in Figure 1, Figure 4, Figure 8 and Figure 9, the condensate drain holes 33 are divided into multiple groups, and the condensate drain holes in each group 33 are arranged in the same area on the funnel-shaped inclined surface 31, and different groups of condensed water discharge holes 33 are arranged at different positions on the funnel-shaped inclined surface 31 to realize the sufficient discharge of the condensate water from specific parts.

In some embodiments of the smoke shield for heat exchangers of the present invention, as shown in Figs. 9-13, the bent portion 2 forms a whole bend facing away from the bottom of the funnel-shaped inclined surface 31, so that in the use state, the funnel-shaped The part where the inclined surface 31 connects to the bent portion 2, that is, the mouth of the funnel-shaped inclined surface 31 is higher than the mounting portion 1. In addition, the connecting part of the bent portion 2 and the mounting portion 1 is bent downward to form a condensate water-cooled condensate tank for collecting the condensate generated at the connection between the smoke baffle for heat exchanger of the present invention and the flue gas heat exchange cavity shell 4 twenty one. The condensate tank 21 can guide the collected condensate to a specific location for discharge. The arrangement of the condensate tank 21 on the bent portion 2 occupies a certain air inlet area of the flue gas heat exchange cavity, which usually leads to an increase in flue gas discharge resistance, which helps to improve the heat exchange effect.

As a specific embodiment of the smoke shield for a heat exchanger of the present invention, as shown in Figs. 9-13, a condensate drain 22 is provided at the bottom of the condensate tank 21. Multiple condensate discharge ports 22 can be provided. For example, ten condensate discharge ports 22 are provided on the condensate water tank 21, and the ten condensate water discharge ports 22 can be symmetrically disposed on the condensate water tank 21 or evenly disposed on the condensate water tank 21. .

In some embodiments of the smoke shield for heat exchangers of the present invention, as shown in FIGS. 2-7, the bent portion 2 is formed as a bend toward the bottom of the funnel-shaped slope 31, so that in the use state, the funnel-shaped slope 31 The portion connected to the bent portion 2, that is, the mouth portion of the funnel-shaped slope 31 is lower than the mounting portion 1. In this way, in the installed state, the volume of the flue gas heat exchange cavity is larger, and the combustion effect of the gas is better. At this time, the condensed water generated at the connection between the smoke baffle for heat exchanger of the present invention and the flue gas heat exchange cavity shell 4 will flow to the funnel-shaped inclined surface 31 along the downwardly bent portion 2 without forming condensed water The accumulation.

An embodiment of the heat exchanger assembly of the present invention, as shown in Figs. 5 to 7, and 11 to Fig. 13, includes a heat exchanger, a flue gas heat exchange cavity shell 4, and a heat exchanger according to any embodiment of the present invention. Smoke shield for heater. The heat exchanger is installed in the flue gas heat exchange cavity shell 4. The flue gas heat exchange cavity shell 4 has an air inlet and an air outlet. The high-temperature flue gas generated by the combustion of gas passes through the air inlet of the flue gas heat exchange cavity shell 4 It enters the flue gas heat exchange cavity, exchanges heat with the heat exchanger in the flue gas heat exchange cavity, heats the cold water in the heat exchanger, and the exhaust gas after heat exchange is discharged through the air outlet of the flue gas heat exchange cavity shell 4. The smoke baffle for the heat exchanger is installed at the air inlet below the flue gas heat exchange cavity shell 4 through the mounting part 1, and the wind shielding surface 34 is kept below the mounting part 1. Specifically, a screw can be used to pass through the mounting hole 11 to be fixed on the flue gas heat exchange cavity shell 4. When the mounting part 1 has an installation rib 12, the installation rib 12 can be clipped to the flue gas heat exchange cavity shell. The exterior of the body 4. In this way, the high-temperature flue gas enters the air inlet of the flue gas heat exchange cavity shell 4 through the vent 32, which increases the flow resistance of the high-temperature flue gas, slows down the flow rate of the high-temperature flue gas, and improves the high-temperature flue gas and exchange rate. The contact time of the heat exchanger improves the heat exchange effect. In addition, the condensed water generated in the heat exchange cavity can be discharged in time through the condensate drain hole 33, the condensate water tank 21, and the condensate drain 22, which improves the corrosion resistance of the heat exchanger components.

In some embodiments of the heat exchanger assembly of the present invention, the heat exchanger includes heat exchange fins and heat exchange tubes, and the heat exchange fins and heat exchange tubes are all formed of stainless steel. The heat exchange fins and heat exchange tubes can use different materials of stainless steel to further improve the processing performance and corrosion resistance of the heat exchanger.

Through the above technical solution, the smoke baffle for heat exchangers of the present invention is installed at the lower end of the flue gas heat exchange cavity shell 4 of the gas water heater through the installation part 1. The higher flue gas 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 wind shield 3 of the smoke shield for heat exchanger of the present invention forms a funnel-shaped venturi structure, so the gas flow velocity at the vent 32 is faster, and the heat exchange area of the heat exchanger The gas flow rate is slower, thereby prolonging the heat exchange time of the higher temperature flue gas in the heat exchange area of the heat exchanger, and improving the heat exchange effect. For condensing water heaters, condensed water will be generated during the heat exchange process, which will accumulate in the heat exchanger, causing the water heater exhaust gas to fail to meet the standard; it will also absorb corrosive gas in the exhaust gas, causing excessive corrosion to the heat exchanger. Shorten the service life of the heat exchanger; in addition, the positive pressure in the heat exchange area of the heat exchanger can easily cause condensate water to leak out from the weak sealing of the heat exchanger and corrode other parts of the water heater. Therefore, the smoke baffle for heat exchangers of the present invention is provided with condensate drain holes 33 on the funnel-shaped slope. In the preferred technical solution of the smoke baffle for heat exchangers of the present invention, other condensate drain structures are also provided for convenience The condensate is discharged, so as to ensure that the condensed water in the heat exchange process can be discharged out of the heat exchanger in time.

In the heat exchanger assembly of the present invention, the smoke baffle for the heat exchanger of the present invention is installed at the air inlet of the flue gas heat exchange cavity shell 4, so that the high-temperature flue gas generated by the combustion of gas can only enter the flue gas through the vent 32 The heat exchange cavity increases the flow resistance of the high-temperature flue gas, slows down the flow rate 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. The arrangement of the condensate drainage structure such as the condensate drain hole 33, the condensate water tank 21 and the condensate drain 22, and the use of a stainless steel heat exchanger can effectively improve the corrosion resistance of the heat exchanger.

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

In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "a specific implementation", etc. means that the specific feature, structure, material, or feature described in conjunction with the embodiment or example includes In at least one embodiment or example of the present invention. In the present invention, the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical concept of the present invention, simple modifications to the technical solution of the present invention can be made, including individual specific technical features combined in any suitable manner. However, these simple modifications and combinations should also be regarded as the disclosed content of the present invention, and all belong to the protection scope of the present invention.

Claims (12)

1. A smoke shield for a heat exchanger, characterized in that it comprises a mounting part (1), a bending part (2) and a wind shielding part (3); the mounting part (1) is arranged on the wind shielding part (3) ), the bent portion (2) is connected between the mounting portion (1) and the windshield (3), and the windshield (3) includes a funnel-shaped inclined surface (31) and a ventilation The vent (32) is provided in the middle of the funnel-shaped slope (31), and the condensate water discharge hole (33) is provided in the funnel-shaped slope (31). 31) On.
2. The smoke shield for a heat exchanger according to claim 1, wherein the wind shield (3) is square, the funnel-shaped slope (31) has four pieces, and the four funnel-shaped slopes (31) ) Are all trapezoidal planes, the waists of the funnel-shaped slope (31) are connected to each other to form a funnel shape, the mouth of the funnel-shaped slope (31) is connected to the bent portion (2), and the funnel-shaped slope ( The bottom of 31) is provided with the vent (32).
3. The smoke shield for a heat exchanger according to claim 2, wherein the wind shield (3) further comprises a wind shield (34), and the wind shield (34) is arranged on the funnel-shaped inclined surface. At the bottom of (31), the vent (32) is provided on the windshield surface (34).
4. The smoke shield for a heat exchanger according to claim 3, wherein the vent (32) extends from the wind shield (34) to the funnel-shaped slopes (31) on opposite sides.
5. The smoke shield for a heat exchanger according to claim 1, wherein there are multiple condensate drain holes (33), and multiple condensate drain holes (33) are provided on the funnel-shaped slope ( 31) Different parts on the top.
6. The smoke shield for a heat exchanger according to claim 5, wherein the condensate discharge holes (33) are divided into multiple groups, and the condensate discharge holes (33) of each group are arranged on the funnel-shaped inclined surface (31) Different positions on.
7. The smoke shield for a heat exchanger according to any one of claims 1-6, wherein the bent portion (2) is formed as a bent portion facing the bottom of the funnel-shaped inclined surface (31) as a whole. , And formed a condensed water tank (21).
8. The smoke baffle for a heat exchanger according to claim 7, wherein the bottom of the condensate tank (21) is provided with a condensate drain (22).
9. The smoke shield for a heat exchanger according to any one of claims 1-6, wherein the bent portion (2) is formed as a bend toward the bottom of the funnel-shaped inclined surface (31).
10. A heat exchanger assembly, which is characterized by comprising a heat exchanger, a flue gas heat exchange cavity shell (4), and a smoke shield for the heat exchanger according to any one of claims 1-9, and the heat exchanger The heat exchanger is installed in the flue gas heat exchange cavity shell (4), and the smoke baffle for the heat exchanger is installed under the flue gas heat exchange cavity shell (4), and is fixed to the flue gas heat exchange cavity shell (4) by the mounting part. At the air inlet of the flue gas heat exchange cavity shell (4).
11. The heat exchanger assembly according to claim 10, wherein the heat exchanger comprises heat exchange fins and heat exchange tubes, and both the heat exchange fins and the heat exchange tubes are formed of stainless steel.
12. A gas water heater, characterized by comprising the heat exchanger assembly according to claim 10 or 11.

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