Waterproof gas-collecting hood assembly and outdoor water heater comprising same

Abstract

The invention relates to a waterproof gas-collecting hood assembly and an outdoor water heater comprising the same. The waterproof gas-collecting hood assembly comprises a shell, a smoke guide component, a smoke outlet, a smoke inlet and a flue defined by the shell and the smoke guide component, the waterproof gas-collecting hood assembly further comprises a baffle, the smoke guide component comprises a slope component and an inflection component, and the slope component is provided with a surface inclining downwards from the side of the smoke inlet to the side of the smoke outlet. The inflection component is located on the side, close to the smoke inlet, of the slope component, a gap is formed between the upper portion of the inflection component and the upper wall face of the shell, the inflection component extends to form a semi-open absorption space, an absorption opening of the absorption space is open towards the smoke outlet, and the baffle is located between the smoke outlet and the inflection component. The baffle extends downwards from the upper wall face of the smoke guide part to the position not higher than the upper edge of the absorption opening. According to the waterproof gas-collecting hood assembly, direct injection or ejection injection of water flow in all directions is effectively prevented, and the waterproof performance of the waterproof gas-collecting hood assembly, especially the waterproof performance in a severe environment, is improved.

Description

Technical Field

[0001] The present invention relates to a waterproof air collecting hood assembly and an outdoor water heater including the same. Background Art

[0002] Since the outdoor water heater operates outdoors, it needs to meet the waterproof requirement. As it is necessary to discharge the flue gas generated by combustion, the outdoor water heater needs to discharge the flue gas to the outside through a flue. Therefore, there will inevitably be an interconnected situation with the outside at the smoke outlet. In order to prevent water from entering the machine interior through the exhaust port, special waterproof designs are required for the exhaust structure (i.e., the air collecting hood assembly structure) of the outdoor unit.

[0003] For example, the waterproof air collecting hood assembly is disclosed in the Chinese patent application CN215724111U. The smoke exhaust cavity formed by combining the housing, side plates and cover plate is the flue for discharging smoke. The anti-backflow smoke baffle provided therein forms a zigzag path of the smoke exhaust cavity, i.e., a zigzag flue, as a smoke guiding component together with other housing and the like. Thus, while meeting the smoke exhaust requirement, it can also prevent external liquids, such as rainwater, from entering the water heater interior through the flue.

[0004] However, the current waterproof air collecting hood assembly cannot ensure waterproofness in harsh conditions. Especially in the case of strong winds or other special situations, rainwater will enter the water heater interior horizontally or even at unusual angles such as from bottom to top through the flue, or the rainwater impacts the flue and then bounces into the water heater interior. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect that the waterproof performance of the existing outdoor water heater is poor and it cannot cope with harsh weather, and to provide a waterproof air collecting hood assembly and an outdoor water heater including the same.

[0006] The present invention solves the above technical problem by the following technical solutions:

[0007] A waterproof air collecting hood assembly includes a housing, a smoke guiding component, a smoke outlet, a smoke inlet, and a flue surrounded by the housing and the smoke guiding component. The waterproof air collecting hood assembly further includes a baffle. The smoke guiding component includes a slope member and a folding member. Among them, the slope member has a surface that slopes downward from the side of the smoke inlet toward the side of the smoke outlet. The folding member is located on the side of the slope member close to the smoke inlet. There is a gap formed between the upper part of the folding member and the upper wall surface of the housing. The folding member extends to form a semi-open absorption space. The absorption opening of the absorption space faces the smoke outlet. The baffle is located between the smoke outlet and the folding member. The baffle extends downward from the upper wall surface of the smoke guiding component to a position not higher than the upper edge of the absorption opening.

[0008] In this solution, the folded structure member is designed to reduce the intense water flow rebound near the entrance of the dangerous area. In this way, due to inertia, the water flow can be stored to a certain extent after rushing above the smoke guide component, and then a relatively stable return water flow is formed. During use, most of the horizontally and downwardly sprayed water will directly spray onto the slope component, and then be led out along the slope component to the smoke outlet and discharged outwards. The water ejected by the slope component will be ejected into the absorption space and then drip onto the slope component. Most of the upwardly sprayed water will directly spray onto the upper wall surface of the housing and then drip onto the slope component. After being ejected by the upper wall surface of the housing, it is blocked by the baffle and then drips onto the slope component. Thus, the water spray in all directions is effectively prevented from flowing in, and the waterproof performance of the waterproof air collection hood assembly is improved, especially the waterproof performance in harsh environments.

[0009] Preferably, the height of the smoke outlet is lower than the height of the absorption opening, and the baffle is blocked in the connection path between the point at the lower edge of the smoke outlet and the point at the upper edge of the absorption opening. This can basically ensure that no water can directly spray into the space above the folded member and then enter the water heater, further improving the waterproof performance.

[0010] Preferably, the connection line between the point at the upper edge of the absorption opening and the point at the lower edge of the baffle intersects at the limiting point of the slope component, and the reflection path is formed by the reflection points of the points at the upper edge of the absorption opening and the points at the upper edge of the smoke outlet relative to the slope component. Among them, the reflection point is closer to the smoke outlet than the limiting point. This can basically ensure that the water ejected by the slope component cannot enter the space above the folded member and then enter the water heater. At the same time, combined with the baffle of a lower height, it can basically ensure that the water ejected by the upper wall surface of the housing cannot enter the space above the folded member and then enter the water heater.

[0011] Preferably, the cross-sectional area between the folded member and the upper wall surface of the housing is not greater than the cross-sectional area between the folded member and the baffle and the cross-sectional area between the lower edge of the baffle and the slope component. This prevents excessive smoke outlet resistance caused by too much channel narrowing during the smoke outlet process.

[0012] Preferably, the slope component includes a basic part and a sinking part. The sinking part is located on the side of the slope component close to the smoke outlet, and the sinking part sinks relative to the basic part. On the one hand, the sinking part can form a step difference to block a part of the sprayed water flow, and on the other hand, the sinking part can reduce the accumulation of water flow on the slope component.

[0013] Preferably, the sinking part includes a first surface and a second surface. The slope of the first surface is greater than that of the basic part, and the second surface is horizontally arranged. The side of the upper wall surface of the housing close to the smoke outlet is a first horizontal wall surface extending horizontally. A first horizontal segment extending horizontally is formed between the first horizontal wall surface, the second surface, and the side wall surface of the housing, and the first horizontal segment forms a part of the flue. The first horizontal segment allows the flue gas to be discharged horizontally without backflow and can also avoid actively collecting rainwater. The sinking part avoids the accumulation caused by the conversion of the water flow sliding down the slope member to the horizontal, and improves the flow capacity of the water flow by forming a height difference.

[0014] Preferably, the upper wall surface of the housing includes an inclined wall surface. An inclined segment extending obliquely is formed between the inclined wall surface, the basic part, and the side wall surface of the housing, and the inclined segment forms a part of the flue. The inclined segment can reduce the amount of water flow entering.

[0015] Preferably, the distance between the inclined wall surface and the inclined segment becomes smaller from the side of the smoke inlet to the side of the smoke outlet.

[0016] Preferably, the upper wall surface of the housing above the folding member is a second horizontal wall surface extending horizontally. A second horizontal segment extending horizontally is formed between the top surface of the folding member, the second horizontal wall surface, and the side wall surface of the housing, and the second horizontal segment forms a part of the flue. The second horizontal segment provides the final buffer to prevent the water flow entering here from directly entering the smoke inlet and then into the water heater.

[0017] Preferably, a vertical segment extending in the vertical direction is formed between the rear wall surface of the housing, the rear surface of the folding member, and the side wall surface of the housing. The vertical segment forms a part of the flue. The smoke inlet is located at the bottom of the vertical segment, and the second horizontal segment communicates with the top of the vertical segment. The vertical segment is conducive to the discharge of the flue gas and enables the smoke inlet to be located at a more internal position of the flue to avoid the entry of water flow.

[0018] Preferably, the flue successively includes a vertical segment, a second horizontal segment, an inclined segment, and a first horizontal segment from the side of the smoke inlet to the side of the smoke outlet. The smoke inlet is located at the bottom of the vertical segment, the smoke inlet is located at the end of the second horizontal segment, and the second horizontal segment is higher than the first horizontal segment. This makes the flue not overly complex so as not to affect the discharge of the flue gas, and at the same time plays a role in preventing the entry of water flow.

[0019] Preferably, an upper flange portion is formed on one side of the housing close to the smoke outlet, a lower flange portion is formed on one side of the smoke guiding member close to the smoke outlet, the waterproof air collecting hood further includes a smoke outlet cylinder with an opening, the smoke outlet cylinder is connected to the upper flange and the lower flange, and one side of the smoke guiding member close to the smoke inlet is suspended. The smoke guiding member is fixed to the housing through the smoke cylinder, which not only simplifies the installation, but also makes the flue inside have no installation structure, reducing the exhaust resistance.

[0020] Preferably, sealing flanges are provided on both sides of the smoke guiding member, and the sealing flanges are attached to the side wall surface of the housing and sealed with sealant. This can prevent water from flowing in through the mating gap.

[0021] Preferably, the slope member and the folding member are integrally bent from a plate. The integrally bent slope member and folding member are easier to manufacture and also ensure the dimensional and assembly accuracy.

[0022] An outdoor water heater, the outdoor water heater includes the waterproof air collecting hood assembly.

[0023] The positive and progressive effects of the present invention are as follows: The present invention effectively prevents the water flow from all directions from directly spraying in or ejecting and spraying in, improving the waterproof performance of the waterproof air collecting hood assembly, especially the waterproof performance in harsh environments. Description of the Drawings

[0024] Figure 1 It is a schematic three-dimensional structure diagram of the waterproof air collecting hood assembly of the preferred embodiment of the present invention.

[0025] Figure 2 It is an exploded structure diagram of the waterproof air collecting hood assembly of the preferred embodiment of the present invention.

[0026] Figure 3 It is a schematic three-dimensional structure diagram of the smoke guiding member of the preferred embodiment of the present invention.

[0027] Figure 4 It is a schematic cross-sectional structure diagram of the waterproof air collecting hood assembly of the preferred embodiment of the present invention.

[0028] Figure 5 It is a schematic diagram of a direct water inlet situation of the preferred embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of the positions of the reflection point and the limit point of the preferred embodiment of the present invention.

[0030] Figure 7 It is a schematic diagram of an ejecting water inlet situation of the preferred embodiment of the present invention.

[0031] Figure 8Schematic diagram of cross-sectional areas at various positions of a preferred embodiment of the present invention.

[0032] Figure 9 Schematic diagram of the structure of an outdoor water heater according to a preferred embodiment of the present invention.

[0033] Description of reference numerals

[0034] Housing 100

[0035] Second horizontal wall surface 110

[0036] Inclined wall surface 120

[0037] First horizontal wall surface 130

[0038] Rear wall surface 140

[0039] Smoke inlet 210

[0040] Smoke outlet 220

[0041] Smoke guiding member 300

[0042] Folding member 310

[0043] Absorption space 311

[0044] Absorption opening 312

[0045] Slope member 320

[0046] Base portion 321

[0047] Sunken portion 322

[0048] First surface 323

[0049] Second surface 324

[0050] Sealing flange 330

[0051] Baffle 400

[0052] Flue 500

[0053] Vertical section 540

[0054] Second horizontal section 510

[0055] Inclined section 520

[0056] First horizontal section 530

[0057] Smoke outlet pipe 600

[0058] Sealing gasket 610

[0059] Bracket 700

[0060] Combustion chamber 800

[0061] Point A

[0062] Point B

[0063] Point C

[0064] Point D

[0065] Reflection point E

[0066] Restriction point F

[0067] Cross-sectional area M

[0068] Cross-sectional area N

[0069] Cross-sectional area O Detailed implementation mode

[0070] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the described embodiments for this reason.

[0071] As Figures 1 - 8 shown, this embodiment discloses a waterproof air collecting hood assembly. As Figures 1 - 4 shown, the waterproof air collecting hood assembly of the present invention includes a housing 100, a smoke guiding component 300, a smoke outlet 220, a smoke inlet 210, and a flue 500 formed by enclosing the housing 100 and the smoke guiding component 300. The waterproof air collecting hood assembly further includes a baffle 400. The smoke guiding component 300 includes a slope member 320 and a folding member 310. Among them, the slope member 320 has a surface that slopes downward from the side of the smoke inlet 210 to the side of the smoke outlet 220. The folding member 310 is located on the side of the slope member close to the smoke inlet 210. An interval is formed between the upper part of the folding member 310 and the upper wall surface of the housing 100. The folding member 310 extends to form a semi-open absorption space 311, and the absorption opening 312 of the absorption space 311 faces the smoke outlet 220 and is open. As Figure 4 shown, the baffle 400 is located between the smoke outlet 220 and the folding member 310. The baffle 400 extends downward from the upper wall surface of the smoke guiding component 300 to a position not higher than the upper edge of the absorption opening 312.

[0072] The smoke inlet 210 and the smoke outlet 220 in this embodiment can be notches formed by enclosing the housing 100 and the smoke guiding component 300, or can be notches formed by other structural members. The smoke inlet 210 and the smoke outlet 220 are connected as the two ends of the flue 500. The flue 500 can be a structural setting that is only connected to the outside through the smoke inlet 210 and the smoke outlet 220 at both ends, or can be a structural setting with multiple smoke inlets 210 or multiple smoke outlets 220. The overall extension of the flue 500 can be, for example, a shape that slopes downward as a whole toward the side of the smoke outlet 220, or can be other extension shapes that are beneficial to preventing water from entering.

[0073] The baffle 400 in this embodiment can be a simple plate-like structure, such as an L-shaped sheet metal, or it can have a complex shape structure. The main function of the baffle 400 lies in the surface facing the smoke inlet 210. The baffle 400 can be fixed to the housing 100 by conventional means, including welding, riveting, bolt connection, etc. After the baffle 400 is fixed, in the direction of the flue gas, the water baffle 400 is downstream of the folding member 310 and can further form an obtuse angle with the flue gas flow direction to facilitate the discharge of the flue gas.

[0074] In this embodiment, the folding structural member 310 is designed to reduce the occurrence of violent water flow rebound near the entrance of the dangerous area. In this way, due to inertia, the water flow can be stored to a certain extent in the absorption space 311 after rushing above the smoke guiding member 300, and then a relatively stable return water flow is formed. During use, most of the horizontally and downwardly sprayed water will directly spray onto the slope member 320 and then be discharged outwards through the slope member 320 to the smoke outlet 220. The water ejected by the slope member 320 will be ejected into the absorption space 311 and then drip onto the slope member 320. Most of the upwardly sprayed water will directly spray onto the upper wall surface of the housing and then drip onto the slope member 320. After being ejected by the upper wall surface of the housing 100 and blocked by the water baffle, it will drip onto the slope member 320.

[0075] It can be seen from this that the flue gas flow direction in the flue 500 of this embodiment shows a stepped downward state. However, when the external water flow is sprayed reversely, the flue 500 is a maze-like structure. The water sprayed in each direction will finally flow out from the smoke outlet 220 along the steps, effectively preventing the water sprayed in each direction from flowing in, and improving the waterproof performance of the waterproof air hood assembly, especially the waterproof performance in harsh environments.

[0076] As Figure 2 and Figure 3 shown, in a preferred embodiment, sealing flanges 330 are provided on both sides of the smoke guiding member 300. The sealing flanges 330 are attached to the side wall surface of the housing 100 and sealed with sealant. The sealing flanges 330 facilitate welding or screwing the smoke guiding member 300 to the housing 100. The sealant can prevent water from flowing in through the mating gap.

[0077] As Figure 2 and Figure 3 shown, in a preferred embodiment, the slope member 320 and the folding member 310 are integrally bent from a sheet. The integrally bent slope member 320 and folding member 310 are easier to manufacture and also ensure dimensional and assembly accuracy.

[0078] As Figure 3 and Figure 4As shown, in a preferred embodiment, the slope member 320 includes a basic portion 321 and a sunken portion 322. The sunken portion 322 is located on the side of the slope member 320 close to the smoke outlet 220, and the sunken portion 322 is sunken relative to the basic portion 321. On the one hand, the sunken portion 322 can form a step difference to block a part of the sprayed water flow. On the other hand, the sunken portion 322 can reduce the accumulation of water flow on the slope member 320. For example, a path with a lower slope of the injection path of A-C as shown in Figure 5 can be blocked by the sunken portion 322, thereby reducing the directly sprayed water flow. At the same time, the water flow flowing down from the basic portion 321 will be directly stored in the sunken portion 322 due to the sudden sinking and then flow out.

[0079] As Figure 3 and Figure 4 shown, in a further preferred embodiment, the sunken portion 322 includes a first surface 323 and a second surface 324. The slope of the first surface 323 is greater than that of the basic portion, and the second surface 324 is horizontally arranged. The side of the upper wall surface of the housing 100 close to the smoke outlet 220 is a horizontally extending first horizontal wall surface 130. A horizontally extending first horizontal section 530 is formed between the first horizontal wall surface 130, the second surface 324, and the side wall surface of the housing 100. The first horizontal section 530 is formed as a part of the flue 500. The first horizontal section 530 can allow the flue gas to be discharged horizontally without backflow, and at the same time can avoid actively collecting rainwater. The sunken portion 322 avoids the accumulation caused by the water flow sliding down from the slope member 320 turning horizontal, and improves the flow ability of the water flow by forming a height difference.

[0080] As Figure 3 and Figure 4 shown, in a preferred embodiment, the upper wall surface of the housing 100 includes an inclined wall surface 120. An inclined section 520 extending obliquely is formed between the inclined wall surface 120, the basic portion 321, and the side wall surface of the housing 100. The inclined section 520 is formed as a part of the flue 500. The inclined section 520 can reduce the amount of water flow entering.

[0081] As Figure 3 and Figure 4 shown, in a preferred embodiment, the distance between the inclined wall surface 120 and the inclined section 520 becomes smaller from the side of the smoke inlet 210 towards the side of the smoke outlet 220.

[0082] As Figure 3 and Figure 4As shown, in a preferred embodiment, the upper wall surface of the housing 100 above the folding member 310 is a horizontally extending second horizontal wall surface 110. A horizontally extending second horizontal section 510 is formed between the top surface of the folding member 310, the second horizontal wall surface 110, and the side wall surface of the housing 100. The second horizontal section 510 forms a part of the flue 500. The second horizontal section 510 provides a final buffer to prevent the water flow entering here from directly entering the smoke inlet 210 and then into the water heater interior.

[0083] As Figure 3 and Figure 4 As shown, in a preferred embodiment, a vertically extending vertical section 540 is formed between the rear wall surface 140 of the housing 100, the rear surface of the folding member 310, and the side wall surface of the housing 100. The vertical section 540 forms a part of the flue 500. The smoke inlet 210 is located at the bottom of the vertical section 540, and the second horizontal section 510 communicates with the top of the vertical section 540. The vertical section 540 is conducive to the discharge of flue gas and enables the smoke inlet 210 to be located at a more internal position of the flue 500 to prevent water flow from entering.

[0084] As Figure 3 and Figure 4 As shown, in a preferred embodiment, the flue 500 sequentially includes a vertical section 540, a second horizontal section 510, an inclined section 520, and a first horizontal section 530 from the side of the smoke inlet 210 to the side of the smoke outlet 220. The smoke inlet 210 is located at the bottom of the vertical section 540, the smoke inlet 210 is located at the end of the second horizontal section 510, and the second horizontal section 510 is higher than the first horizontal section 530. This makes the flue 500 not overly complex so as not to affect the discharge of flue gas, and at the same time plays a role in preventing water flow from entering.

[0085] As Figure 3 and Figure 4 As shown, in a preferred embodiment, an upper flange portion is formed on one side of the housing 100 close to the smoke outlet 220, a lower flange portion is formed on one side of the smoke guiding member 300 close to the smoke outlet 220. The waterproof air collecting hood further includes an open smoke outlet cylinder 600. The smoke outlet cylinder 600 is connected to the upper flange and the lower flange. The side of the smoke guiding member 300 close to the smoke inlet 210 is suspended. The smoke guiding member 300 is fixed to the housing 100 through the smoke cylinder, which not only simplifies the installation, but also makes the flue 500 inside have no installation structure, reducing the exhaust resistance.

[0086] As Figure 5As shown, in a preferred embodiment, the height of the smoke outlet 220 is lower than the height of the absorption opening 312, and the baffle 400 blocks the connection path between point A at the lower edge of the smoke outlet 220 and point C at the upper edge of the absorption opening 312. After such a setting, in extreme cases, the water sprayed upward from point A at the lower edge of the smoke outlet 220 will be blocked. Specifically, the path with a slope higher than Figure 5 the path shown will be blocked by the baffle 400, and the path with a slope lower than Figure 5 the path shown will be blocked by the folding member 310 and enter the absorption opening 312. Thus, it can be basically ensured that no water can directly spray into the space above the folding member 310 and then enter the water heater, further improving the waterproof performance.

[0087] As Figure 6 and Figure 7 shown, in a preferred embodiment, the connection line between point C at the upper edge of the absorption opening 312 and point D at the lower edge of the baffle 400 intersects at the limiting point F of the slope member 320. The connection line between point C at the upper edge of the absorption opening 312 and the reflection point E of point B at the upper edge of the smoke outlet 220 on the slope member 320 forms a reflection path. Among them, the reflection point E is closer to the smoke outlet 220 than the limiting point F (contrary to Figure 6 the display). As Figure 6 shown, it shows that the limiting point F is closer to the smoke outlet 220 than the reflection point E, which is contrary to the setting of this embodiment. This shows that when the limiting point F is closer to the smoke outlet 220 than the reflection point E, the water flow passing through the B-E-C path is likely to enter the dangerous area above the folding member 310 after reflection.

[0088] From an actual analysis perspective, since the kinetic energy of the water after the second bounce is small and the risk is small, the main thing to guard against is the water flow of the first bounce or, that is, it is necessary to avoid the water flow being ejected onto the slope member 320 and then bouncing into the dangerous area above the folding member 310. When only considering the existence of the slope member 320 and the baffle 400, the water flow entering the dangerous area after being reflected by the slope member 320 may come from the F-D-C reflection path. Thus, it can be known that the farthest point from the folding member 310, that is, the closest point to the smoke outlet 220, where the collision may enter the dangerous area is the limiting point F. That is, the connection line between point C at the upper edge of the absorption opening 312 and point D at the lower edge of the baffle 400 intersects at the limiting point F of the slope member 320. According to the reflection slope, the reflection passing through the area between point D and point C must be generated on the left side of the limiting point F. Therefore, the collisions in the area closer to the smoke outlet 220 outside the limiting point F ( Figure 6 the area to the right of the limiting point F in Figure 6 ) cannot enter the dangerous area above the folding member 310. That is,

[0089] In addition, regardless of whether the baffle 400 can block it or not, the situation where water is injected from the smoke outlet 220 and rebounds on the slope member 320 and enters the dangerous area above the folding member 310 is not considered. Most of the water flow injected from the smoke outlet 220 will actually flow into the absorption opening 312 of the folding member 310. As Figure 6 shown, in order to escape from the folding member 310, it is necessary to increase the reflection angle formed by the water flow on the slope member 320. Therefore, the water flow that is most likely to cross the folding member 310 must have the largest downward inclination angle. Therefore, the water flow passes through point B on the upper edge of the smoke outlet 220. Therefore, in the most extreme case, the water flow is injected through point B on the upper edge of the smoke outlet 220, and then after reflecting at the reflection point E on the slope member 320, it can just pass through the very end of the folding member 310. Therefore, its reflection point E is formed by the relative position of point C on the upper edge of the absorption opening 312 and point B on the upper edge of the smoke outlet 220 on the slope member 320, as Figure 6 shown. The reflection formed to the left of the reflection point E cannot pass through the folding member 310, that is, it cannot enter the dangerous area above the folding member 310. The area to the left of the reflection point E is the ineffective collision area. So, to make all the reflection points on the entire slope member 320 become infeasible areas, as long as the reflection point E is closer to the smoke outlet 220 than the limit point F, that is, the limit point F is on the left side of the reflection point E.

[0090] Therefore, after changing the situation in Figure 6 and Figure 7 , making the reflection point E closer to the smoke outlet 220 than the limit point F can prevent the reflection path of B - E - C from crossing into the dangerous area of the folding member 310. Thus, it can basically ensure that the water ejected through the slope member 320 cannot enter the space above the folding member 310 and then enter the water heater. At the same time, combined with the baffle 400 at a lower height, it can basically ensure that the water ejected through the upper wall surface of the housing cannot enter the space above the folding member 310 and then enter the water heater.

[0091] As Figure 6 and Figure 7 shown, in specific settings, a coordinate system is established with the vertical axis passing through point C and the horizontal axis passing through point A in Figure 7 . The inclination angle of the slope member 320 is θ. Each coordinate point is established, A (w5, 0), B (w4, h4), C (0, h1), D (w2, h2), G (0, h3). Point G is the intersection of the extension line of the slope member 320 and the vertical axis.

[0092] First, find the coordinates of the limit point F. The equation of the straight line CD is: y = (h2 - h1) * x / w2 + h1, and the equation of the straight line GE on the surface of the slope member 320 is: y = -x * tan(θ) + h3. Therefore, the intersection point, that is, the limit point F, is obtained. The abscissa of the limit point F is: xF =(h1 - h3)w2 / (h2 - h1 + w2tan(θ)).

[0093] Next, find the abscissa position of the reflection point E. According to the reflection principle, through the extension line of the straight line CE, the extension line of CE and the straight line BE are symmetric with respect to the straight line GE. There is a symmetric point B' on the extension line of CE (i.e., the symmetric point of point B with respect to the straight line GE), and the coordinates of point B' are obtained as: x' = w4 + 2tan(θ) * (h3 - w4 * tan(θ) - h4) / (1 + tan 2 (θ)); y' = h4 + 2(h3 - tan(θ) * w4 - h4) / (1 + tan 2 (θ)). Therefore, the straight line equation of CE is obtained according to point C and point B' on the extension line of CE as: y = (y' - h1) * x / x' + h1.

[0094] Finally, according to the equations of the straight line CE and the straight line BE, the coordinates of the reflection point E are obtained: x E =(h3 - h1) * [w4 * (1 - tan 2 (θ)) - 2tan(θ) * (h4 - h3)] / [(1 + tan 2 (θ)) * (2h3 - tan(θ) * w4 - h1 - h4)].

[0095] To make the limiting point F be on the left side of the reflection point E, that is, x F < x E , that is: (h1 - h3)w2 / (h2 - h1 + w2tan(θ)) < (h3 - h1) * [w4 * (1 - tan 2 (θ)) - 2tan(θ) * (h4 - h3)] / [(1 + tan 2 (θ)) * (2h3 - tan(θ) * w4 - h1 - h4)].

[0096] As Figure 8 shown, in the preferred embodiment, the cross-sectional area M between the folding member 310 and the upper wall surface of the housing 100 is not greater than the cross-sectional area N between the folding member 310 and the baffle 400 and the cross-sectional area O between the lower edge of the baffle 400 and the slope member 320. Thus, excessive smoke outlet resistance caused by channel narrowing during the smoke outlet process is prevented.

[0097] As Figure 9 shown, the waterproof air collecting hood assembly of the present invention is used for an outdoor water heater, and the outdoor water heater includes a combustion chamber 800, and the waterproof air collecting hood assembly is arranged above the combustion chamber 800 to discharge gas.

[0098] The present invention effectively prevents water flow from directly spraying or ejecting in all directions, improving the waterproof performance of the waterproof air collecting hood assembly, especially the waterproof performance in harsh environments.

[0099] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only for illustration purposes. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A waterproof gas collecting hood assembly, comprising a housing, a smoke guiding component, a smoke outlet, a smoke inlet, and a flue formed by enclosing the housing and the smoke guiding component, characterized in that, The waterproof air collecting hood assembly further includes a baffle. The smoke guiding member includes a slope member and a folded member. Among them, the slope member has a surface that slopes downward from the side of the smoke inlet towards the side of the smoke outlet. The folded member is located on the side of the slope member close to the smoke inlet. There is a gap formed between the upper part of the folded member and the upper wall surface of the housing. The folded member extends to form a semi-open absorption space. The absorption opening of the absorption space faces the smoke outlet. The baffle is located between the smoke outlet and the folded member. The baffle extends downward from the upper wall surface of the smoke guiding member to a position not higher than the upper edge of the absorption opening.

2. The waterproof air collecting hood assembly according to claim 1, wherein, The height of the smoke outlet is lower than the height of the absorption opening. The baffle blocks the connection path between the point at the lower edge of the smoke outlet and the point at the upper edge of the absorption opening.

3. The waterproof air collection hood assembly according to claim 1 or 2, characterized in that, The connection line between the point at the upper edge of the absorption opening and the point at the lower edge of the baffle intersects at a limiting point of the slope member. The reflection path is formed by the reflection points on the slope member corresponding to the points at the upper edges of the absorption opening and the smoke outlet. Among them, the reflection point is closer to the smoke outlet than the limiting point.

4. The waterproof air collecting hood assembly according to claim 1, characterized in that, The cross-sectional area between the folded member and the upper wall surface of the housing is not greater than the cross-sectional area between the folded member and the baffle, and the cross-sectional area between the lower edge of the baffle and the slope member.

5. The waterproof air collecting hood assembly according to claim 1, wherein The slope member includes a basic part and a sunken part. The sunken part is located on the side of the slope member close to the smoke outlet. The sunken part is sunken relative to the basic part.

6. The waterproof air collecting hood assembly according to claim 5, wherein, The sunken part includes a first surface and a second surface. The slope of the first surface is greater than that of the basic part. The second surface is horizontally arranged. The side of the upper wall surface of the housing close to the smoke outlet is a horizontally extending first horizontal wall surface. A horizontally extending first horizontal section is formed between the first horizontal wall surface, the second surface, and the side wall surface of the housing. The first horizontal section forms a part of the flue.

7. The waterproof air collection hood assembly according to claim 5 or 6, wherein The upper wall surface of the housing includes an inclined wall surface. An inclined section that extends obliquely is formed between the inclined wall surface, the basic part, and the side wall surface of the housing. The inclined section forms a part of the flue.

8. The waterproof air collecting hood assembly according to claim 7, characterized in that, The distance between the inclined wall surface and the inclined section becomes smaller from the side of the smoke inlet towards the side of the smoke outlet.

9. The waterproof air collecting hood assembly according to claim 1, wherein, The upper wall surface of the housing above the folded member is a horizontally extending second horizontal wall surface. A horizontally extending second horizontal section is formed between the top surface of the folded member, the second horizontal wall surface, and the side wall surface of the housing. The second horizontal section forms a part of the flue.

10. The waterproof air collecting hood assembly according to claim 9, wherein, A vertically extending vertical section is formed between the rear wall surface of the housing, the rear surface of the folded member, and the side wall surface of the housing. The vertical section forms a part of the flue. The smoke inlet is located at the bottom of the vertical section. The second horizontal section is connected to the top of the vertical section.

11. The waterproof air collecting hood assembly according to claim 1, wherein, The flue successively includes a vertical section, a second horizontal section, an inclined section, and a first horizontal section from the side of the smoke inlet to the side of the smoke outlet. The smoke inlet is located at the bottom of the vertical section, the smoke inlet is located at the end of the second horizontal section, and the second horizontal section is higher than the first horizontal section.

12. The waterproof air collecting hood assembly according to claim 1, characterized in that, An upper flange portion is formed on one side of the housing close to the smoke outlet, a lower flange portion is formed on one side of the smoke guiding member close to the smoke outlet. The waterproof air collecting hood further includes a smoke outlet cylinder with an opening, and the smoke outlet cylinder is connected to the upper flange and the lower flange. One side of the smoke guiding member close to the smoke inlet is arranged in a suspended manner.

13. The waterproof air collecting hood assembly according to claim 1, wherein, Sealing flanges are arranged on both sides of the smoke guiding member, and the sealing flanges are attached to the side wall surface of the housing and sealed with sealant.

14. The waterproof air collecting hood assembly according to any one of claims 1-13, characterized in that, The slope member and the folding member are integrally bent from a plate.

15. An outdoor water heater, characterized in that, The outdoor water heater includes the waterproof air collecting hood assembly according to any one of claims 1-14.

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