Smoke collecting hood, smoke exhaust device and fuel gas equipment

Abstract

The utility model discloses an exhaust fume collecting hood, exhaust fume extractor and gas equipment, the exhaust fume collecting hood includes: a support plate, the support plate is inclined relative to the plane where the exhaust fume inlet of the exhaust fume collecting hood is located, the support plate is used for installing a fan, and the support plate is provided with an exhaust fume outlet used for communicating with the air inlet of the fan; the flow guide plate is connected with the supporting plate and forms an included angle with the supporting plate, and the included angle between the flow guide plate and the supporting plate is opened towards the smoke inlet; the first side plate is used for connecting the supporting plate with the guide plate; the second side plate and the first side plate are oppositely arranged in a spaced mode, and the second side plate connects the supporting plate with the flow guide plate; the supporting plate, the first side plate, the flow guide plate and the second side plate are assembled and connected and define a smoke collecting cavity, and the smoke collecting cavity communicates with the smoke inlet and the smoke outlet. According to the technical scheme, after the draught fan is assembled on the exhaust fume collecting hood, airflow distribution of the air inlet section of the draught fan can be more uniform, the machining efficiency can be improved, the material consumption is reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke exhaust, in particular to a smoke collecting hood, a smoke exhaust device and a gas equipment. Background Art

[0002] The smoke exhaust device is a core component used to exhaust smoke in gas equipment. The smoke exhaust device generally includes a smoke hood and a fan. When the fan is running, it drives the smoke generated inside the gas equipment to flow and collect it in the smoke hood before being discharged. For traditional high-extraction gas equipment, the smoke hood of its smoke exhaust device mostly has a right-angle bending structure. The volute of the fan is vertically arranged on the side of the smoke hood and is located above the right-angle bending structure. This type of smoke hood has a right-angle bending structure, which causes local airflow obstruction, making the airflow distribution in the air inlet section of the fan uneven, thereby affecting the heat exchange efficiency of the whole machine. In the related art, some smoke hoods can avoid the right-angle bending structure through structural design, so that the volute of the fan is inclined relative to the smoke inlet of the smoke hood, but this type of smoke hood is usually an integrated structure and needs to be formed by hydraulic stretching. The processing speed is slow, the efficiency is low, and the material consumption is large, and the manufacturing cost is high. Utility Model Content

[0003] The main purpose of the utility model is to provide a smoke hood, which aims to make the airflow distribution in the air inlet section of the fan more uniform after the fan is assembled, and compared with the smoke hood with an integrally formed structure, it can improve processing efficiency, reduce material consumption and reduce manufacturing costs.

[0004] In order to achieve the above-mentioned purpose, the smoke collecting hood proposed by the utility model comprises:

[0005] A support plate is arranged at an inclination relative to the plane where the smoke inlet of the smoke collecting hood is located, the support plate is used to install the fan, and the support plate is provided with a smoke outlet for communicating with the air inlet of the fan;

[0006] A guide plate connected to the support plate and arranged at an angle, wherein the angle between the guide plate and the support plate opens toward the smoke inlet;

[0007] A first side plate, connecting the support plate and the guide plate; and

[0008] a second side plate, opposite to and spaced from the first side plate, the second side plate connecting the support plate and the guide plate;

[0009] The support plate, the first side plate, the guide plate, and the second side plate are assembled, connected, and surrounded to form a smoke collecting chamber, and the smoke collecting chamber is connected to the smoke inlet and the smoke outlet.

[0010] In one embodiment, the guide plate is connected to the first side plate and the second side plate respectively through a sheet metal riveting structure;

[0011] And / or, the support plate is respectively connected to the first side plate, the guide plate and the second side plate through a sheet metal riveting structure.

[0012] In one embodiment, the first side plate is provided with a first riveted portion, the guide plate is provided with a first matching portion, and the first riveted portion and the first matching portion form a flanging riveted joint; the second side plate is provided with a second riveted portion, the guide plate is provided with a second matching portion, and the second riveted portion and the second matching portion form a flanging riveted joint; the support plate is provided with a third riveted portion, the first side plate, the guide plate and the second side plate are respectively provided with a third matching portion, and the third riveted portion and the third matching portion form a flanging riveted joint.

[0013] In one of the embodiments, an air guide ring is provided at the periphery of the smoke outlet, and the air guide ring is provided on a side of the support plate away from the smoke collecting chamber, and the air guide ring is used to dock with and communicate with the air inlet of the fan.

[0014] In one of the embodiments, the air guide ring and the support plate are integrally formed.

[0015] In one of the embodiments, the support plate has a support surface for supporting the fan, and an angle φ is formed between the support surface and the plane where the smoke inlet is located, wherein the angle φ is not less than 36° and not more than 40°.

[0016] The utility model also provides a smoke exhaust device, comprising:

[0017] A fume hood as described above;

[0018] a fan mounted on the support plate, the fan having an air inlet connected to the smoke outlet and an air outlet connected to the air inlet; and

[0019] A smoke exhaust pipe, one end of which is connected to the air outlet, and the other end of which is provided with a smoke exhaust port.

[0020] In one embodiment, the smoke exhaust pipe includes a bent pipe section and a straight pipe section, one end of the bent pipe section is connected to the air outlet, and the straight pipe section is connected to the end of the bent pipe section away from the air outlet. The axis of the straight pipe section is perpendicular to the plane where the smoke inlet is located, and the end of the straight pipe section away from the bent pipe section forms the smoke exhaust port.

[0021] The utility model also provides a gas equipment, comprising a shell and the smoke exhaust device as described above, wherein the smoke collecting hood and the fan are arranged in the shell, and one end of the smoke exhaust pipe provided with the smoke exhaust port passes through the shell.

[0022] In one embodiment, the smoke exhaust pipe has a straight pipe section passing through the top wall of the shell, and the projection point formed by the axis of the straight pipe section on the top wall is located at the center of the top wall.

[0023] In one embodiment, the shell includes a first side wall and a second side wall that are opposite and spaced apart in the width direction, the fan is located between the first side wall and the support plate, and an installation space for accommodating an extended functional module is formed between one side of the smoke hood where the guide plate is provided and the second side wall.

[0024] In one embodiment, the burner, the heat exchanger and the smoke exhaust device of the gas equipment are arranged from bottom to top and are disposed close to the first side wall, the fan is located in the area formed by the first side wall, the support plate and the top wall of the shell, and the smoke exhaust pipe is located on the side of the fan away from the first side wall.

[0025] The technical solution of the utility model optimizes the structure of the smoke hood so that the smoke hood is generally a triangular pyramid structure, wherein the support plate is inclined relative to the plane where the smoke inlet is located. When the support plate is equipped with a fan, the volute of the fan can be inclined at a certain angle relative to the plane where the smoke inlet of the smoke hood is located, thereby improving the gas flow velocity distribution at the air inlet, and the airflow in the smoke collection chamber can be better guided to flow toward the smoke outlet on the support plate through the guide plate. In this way, there is no right-angle bend structure to hinder the flow of air on the path where the smoke flows from the smoke inlet to the air inlet of the fan, so that the airflow distribution of the fan inlet section is more uniform, which can effectively improve the heat exchange efficiency of the whole machine. In addition, the smoke hood of the technical solution adopts an assembled structure, and the smoke hood is assembled by a plurality of independent plate-like components such as a support plate, a guide plate, a first side plate, and a second side plate. Since the size of each independent plate-like component (such as the support plate, the guide plate, the first side plate, and the second side plate) is relatively small, the material consumption is small, and the structure is relatively simple, the processing difficulty is greatly reduced, and the processing is easier. In this way, the batch production of each plate-like component can be achieved in a shorter time, which can improve the processing efficiency. In practical applications, each plate-like component can be batch processed first, and then assembled, and the manufacturing process is simple. Compared with the traditional one-piece structure smoke hood, the assembled smoke hood of this technical solution is easier to manufacture, uses less material, can improve processing efficiency, and reduce manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 This is a structural schematic diagram of an embodiment of the smoke exhaust device of the utility model;

[0028] Figure 2 for Figure 1 A front view of the middle smoke exhaust device;

[0029] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the smoke exhaust device;

[0030] Figure 4 This is a schematic structural diagram of an embodiment of a smoke collecting hood of the utility model;

[0031] Figure 5 for Figure 4 Schematic diagram of the exploded structure of CIMC smoke hood;

[0032] Figure 6 This is a schematic diagram of the structure of an embodiment of the gas equipment of the utility model;

[0033] Figure 7 A comparison diagram of the velocity vector diagram of the flow field on the meridional plane of the fan of a conventional smoke exhaust device (a) and the velocity vector diagram of the flow field on the meridional plane of the fan of a smoke exhaust device according to an embodiment of the utility model (b);

[0034] Figure 8 It is a comparison diagram of the velocity cloud diagram (c) of the fan inlet of a traditional smoke exhaust device and the velocity cloud diagram (d) of the fan inlet of a smoke exhaust device according to an embodiment of the present invention.

[0035] Description of Figure Numbers:

[0036]

[0037]

[0038] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0042] The smoke exhaust device is a core component used to exhaust smoke in gas equipment. The smoke exhaust device generally includes a smoke hood and a fan. When the fan is running, it drives the smoke generated inside the gas equipment to flow and collect it in the smoke hood before being discharged. For traditional high-draft gas equipment (such as high-draft gas water heaters), the smoke hood of its smoke exhaust device mostly has a right-angle bending structure. The volute of the fan is vertically arranged on the side of the smoke hood and located above the right-angle bending structure. This type of smoke hood has a right-angle bending structure, which causes local airflow obstruction, making the airflow distribution of the fan air inlet section uneven, thereby affecting the heat exchange efficiency of the whole machine. In the related art, some smoke hoods can avoid the right-angle bending structure through structural design, so that the volute of the fan is inclined relative to the smoke inlet of the smoke hood, but this type of smoke hood is usually an integrated structure. During production and manufacturing, a whole piece of large sheet metal needs to be formed by hydraulic stretching, resulting in slow processing speed, low efficiency and high manufacturing cost.

[0043] Based on this, the utility model proposes a smoke exhaust device 100. By optimizing the design of the smoke hood 10 structure of the smoke exhaust device 100, when the fan 20 is mounted on the smoke hood 10, the volute 21 of the fan 20 can be tilted at a certain angle relative to the smoke inlet 101 of the smoke hood 10 to avoid the right-angle bending structure and airflow obstruction, so that the airflow distribution of the air inlet section of the fan 20 is more uniform, which can effectively improve the heat exchange efficiency of the whole machine. And by optimizing the design of the assembly structure of the smoke hood 10, compared with the smoke hood with an integrated structure, the processing efficiency of the smoke hood 10 can be improved and the manufacturing cost can be reduced. The following mainly introduces the specific implementation methods of the smoke exhaust device 100 and the smoke hood 10 by example.

[0044] The utility model provides a smoke collecting hood 10 .

[0045] Please refer to Figures 1 to 5 In one embodiment of the utility model, the smoke collecting hood 10 includes a supporting plate 11 , a guide plate 12 , a first side plate 13 and a second side plate 14 . The support plate 11 is inclined relative to the plane where the smoke inlet 101 of the smoke collecting hood 10 is located, and the support plate 11 is used to install the fan 20. The support plate 11 is provided with a smoke outlet 102 for communicating with the air inlet of the fan 20; the guide plate 12 is connected to the support plate 11 and is arranged at an angle, and the angle between the guide plate 12 and the support plate 11 is opened toward the smoke inlet 101; the first side plate 13 connects the support plate 11 with the guide plate 12; the second side plate 14 is opposite to the first side plate 13 and is arranged at intervals, and the second side plate 14 connects the support plate 11 with the guide plate 12; the support plate 11, the first side plate 13, the guide plate 12, and the second side plate 14 are assembled, connected and surrounded to form a smoke collecting chamber 103, and the smoke collecting chamber 103 is connected with the smoke inlet 101 and the smoke outlet 102.

[0046] In the present embodiment, the smoke hood 10 is generally a triangular pyramid structure with an open bottom, and a smoke inlet 101 is formed at the bottom of the smoke hood 10. The support plate 11 and the guide plate 12 are arranged at an angle to form a structure similar to a "human" shape. The angle between the support plate 11 and the guide plate 12 is opened toward the side of the smoke inlet 101, so that the support plate 11 and the guide plate 12 are arranged at a certain inclination angle relative to the smoke inlet 101. The first side plate 13 and the second side plate 14 are arranged oppositely and at intervals, and both have a triangular structure for connecting the support plate 11 and the guide plate 12. Specifically, the smoke hood 10 adopts an assembled structure, which is formed by assembling and connecting the support plate 11, the guide plate 12, the first side plate 13, and the second side plate 14. Among them, any two of the support plate 11, the guide plate 12, the first side plate 13, and the second side plate 14 are assembled and connected, including but not limited to one or more combinations of riveting, screw connection, and clamping, etc., which are not specifically limited here. Optionally, the support plate 11, the guide plate 12, the first side plate 13 and the second side plate 14 are made of sheet metal to ensure that the smoke hood 10 has high structural strength and heat resistance, and is also convenient for assembly by riveting.

[0047] Please combine Figures 1 to 3 The support plate 11 of the smoke hood 10 is used to install the fan 20. The fan 20 generally includes a volute 21, a wind wheel 22 disposed in the volute 21, and a motor 23 for driving the wind wheel 22 to rotate. The volute 21 is provided with an air inlet and an air outlet. When the smoke hood 10 and the fan 20 are assembled in place, the side of the volute 21 of the fan 20 with the air inlet is in contact with the support surface 111 of the support plate 11, and the motor 23 is located on the side of the volute 21 away from the support plate 11. Since the support plate 11 is inclined relative to the plane where the smoke inlet 101 is located, the volute 21 of the fan 20 is also inclined at a certain angle relative to the plane where the smoke inlet 101 is located. In this way, after the smoke enters the smoke collecting chamber 103 from the smoke inlet 101, it can be more smoothly transported to the smoke outlet 102, and then transported from the smoke outlet 102 to the air inlet of the fan 20, and the airflow in the smoke collecting chamber 103 can be guided by the guide plate 12 to flow toward the smoke outlet 102 on the support plate 11. In this way, there is no right-angle bend structure to hinder the flow of air on the path where the smoke flows from the smoke inlet 101 toward the air inlet of the fan 20, so that the airflow distribution in the air inlet section of the fan 20 is more uniform, which can effectively improve the heat exchange efficiency of the whole machine.

[0048] The technical solution of the utility model optimizes the structure of the smoke hood 10 so that the smoke hood 10 is generally a triangular pyramid structure, wherein the support plate 11 is inclined relative to the plane where the smoke inlet 101 is located. When the support plate 11 is equipped with a fan 20, the volute 21 of the fan 20 can be inclined at a certain angle relative to the plane where the smoke inlet 101 of the smoke hood 10 is located, thereby improving the gas flow velocity distribution at the air inlet, and the guide plate 12 can better guide the airflow in the smoke collection chamber 103 to flow toward the smoke outlet 102 on the support plate 11, so that there is no right-angle bending structure to hinder the flow of air on the path where the smoke flows from the smoke inlet 101 to the air inlet of the fan 20, so that the airflow distribution of the air inlet section of the fan 20 is more uniform, which can effectively improve the heat exchange efficiency of the whole machine. In addition, the smoke hood 10 of the technical solution adopts an assembled structure, and the smoke hood 10 is assembled by a plurality of independent plate-like components such as the support plate 11, the guide plate 12, the first side plate 13 and the second side plate 14. Since the size of each independent plate-like component (such as the support plate 11, the guide plate 12, the first side plate 13, and the second side plate 14) is relatively small, the material consumption is small, and the structure is relatively simple, the processing difficulty is greatly reduced, and the processing is easier. In this way, the batch production of each plate-like component can be achieved in a shorter time, which can improve the processing efficiency. In practical applications, each plate-like component can be batch processed first, and then assembled, and the manufacturing process is simple. Compared with the traditional one-piece structure of the smoke hood 10, the assembled smoke hood 10 of the present technical solution is less difficult to manufacture, uses less material, can improve processing efficiency, and reduce manufacturing costs.

[0049] In order to further simplify the assembly process of the smoke hood 10 and improve the assembly efficiency, in one embodiment, the guide plate 12 is respectively connected to the first side panel 13 and the second side panel 14 through a sheet metal riveting structure; and / or, the support plate 11 is respectively connected to the first side panel 13, the guide plate 12 and the second side panel 14 through a sheet metal riveting structure. It should be noted that the sheet metal riveting structure here includes but is not limited to riveting without rivets (for example, flanging riveting), or rivets can also be used for riveting. Compared with other assembly processes (such as screw connection), the riveting process is simpler and the assembly efficiency is higher. In order to facilitate the riveting process, optionally, the support plate 11, the guide plate 12, the first side panel 13 and the second side panel 14 can be generally set to a flat plate shape.

[0050] Optionally, the bottom side of the support plate 11 is provided with a first extension plate extending downward, the bottom side of the guide plate 12 is provided with a second extension plate extending downward, the first extension plate is opposite to the second extension plate and is arranged at intervals, and the first extension plate, the first side plate 13, the second extension plate, and the second side plate 14 are surrounded to form a quadrilateral frame structure. In this way, the area of ​​the side of the smoke hood 10 close to the smoke inlet 101 is relatively large, which is conducive to the smoke from the smoke inlet 101 Enter the smoke hood 10. As the smoke flows upward, the cross-sectional area of ​​the smoke hood 10 perpendicular to the direction of smoke flow gradually decreases, which is conducive to the collection of smoke. Optionally, the first extension plate and the second extension plate are respectively provided with a bracket 40, so as to facilitate assembly with other components. In addition, in order to improve the structural strength of the smoke hood 10, reinforcing ribs can also be provided on the first side plate 13 and / or the second side plate 14. Among them, the reinforcing ribs include but are not limited to being set in a ring shape, a long strip or other shapes. Taking the first side plate 13 as an example, the bottom side of the first side plate 13 is provided with a first reinforcing rib extending in parallel with the side edge thereof, the side of the first side plate 13 close to the guide plate 12 is provided with a second reinforcing rib extending in parallel with the side edge thereof, and the middle portion of the first side plate 13 is provided with a triangular annular reinforcing rib similar in shape to the first side plate 13. The structure of the second side plate 14 is similar to that of the first side plate 13, and will not be described in detail here.

[0051] like Figure 4 and Figure 5 As shown, in one embodiment, the first side plate 13 is provided with a first riveted portion 131, the guide plate 12 is provided with a first matching portion 121, and the first riveted portion 131 and the first matching portion 121 form a flanging riveted joint; the second side plate 14 is provided with a second riveted portion 141, the guide plate 12 is provided with a second matching portion 122, and the second riveted portion 141 and the second matching portion 122 form a flanging riveted joint; the support plate 11 is provided with a third riveted portion 112, the first side plate 13, the guide plate 12 and the second side plate 14 are respectively provided with a third matching portion 123, and the third riveted portion 112 and the third matching portion 123 form a flanging riveted joint.

[0052] In the present embodiment, the two opposite sides of the guide plate 12 form a flanging riveting structure with the first side plate 13 and the second side plate 14 respectively, and the three side edges of the support plate 11 form a flanging riveting structure with the first side plate 13, the guide plate 12 and the second side plate 14 respectively, so that the side plates of the smoke hood 10 can be assembled by the flanging riveting process, the assembly structure is simple, stable and reliable, and the edges of the two plate-like components that cooperate with each other can form a edging structure through the flanging riveting structure, which can improve the sealing performance of the smoke hood 10. Specifically, in the present embodiment, the first matching portion 121 and the second matching portion 122 are respectively folded edges bent from the two side edges of the guide plate 12 toward the side away from the smoke collecting chamber 103, the first matching portion 121 is abutted with the first side plate 13, and the second matching portion 122 is abutted with the second side plate 14, which can increase the contact area with the first side plate 13 and the second side plate 14, and improve the support stability. The first riveted portion 131 is a first flange wrapped around the edge of the first matching portion 121, and the second riveted portion 141 is a second flange wrapped around the edge of the second matching portion 122, so that the two sides of the guide plate 12 respectively form a stable and reliable flange riveted structure with the first side plate 13 and the second side plate 14. The third matching portion 123 is a folded edge bent from the edges of the first side plate 13, the guide plate 12 and the second side plate 14 toward the side away from the smoke collecting chamber 103. The third matching portion 123 abuts against the support plate 11, which can increase the contact area with the support plate 11 and improve the support stability. The third riveted portion 112 is a third flange wrapped around the edge of the third matching portion 123, so that the three sides of the support plate 11 respectively form a stable and reliable flange riveted structure with the first side plate 13, the guide plate 12 and the second side plate 14.

[0053] like Figure 4 As shown, in one embodiment, an air guide ring 15 is provided at the periphery of the smoke outlet 102, and the air guide ring 15 is provided on the side of the support plate 11 away from the smoke collecting chamber 103, and the air guide ring 15 is used to dock and communicate with the air inlet of the fan 20. By providing the air guide ring 15, the airflow can be well guided into the volute 21 of the fan 20. Among them, the air guide ring 15 and the support plate 11 can be separately provided and then assembled, or an integrally formed structure can be adopted. Optionally, the air guide ring 15 and the support plate 11 are integrally formed. During production and manufacturing, the smoke outlet 102 can be formed into a flanging structure through a hole extraction process, and the flanging of the periphery of the smoke outlet 102 forms the air guide ring 15. In this way, the assembly process of the air guide ring 15 and the support plate 11 can be omitted, and the structure is stable and reliable.

[0054] Based on the above embodiments, Figure 2As shown, in one embodiment, the support plate 11 has a support surface 111 for supporting the fan 20, and an angle φ is formed between the support surface 111 and the plane where the smoke inlet 101 is located, wherein the angle φ is not less than 36° and not greater than 40°. That is, 36°≤φ≤40°. For example, the angle φ can be 36°, 37°, 38°, 39°, 40°, and so on. By making the angle φ between 36° and 40°, when the fan 20 is assembled on the smoke hood 10, the angle between the plane where the air inlet of the fan 20 is located and the plane where the smoke inlet 101 of the smoke hood 10 is located is moderate, which is conducive to further improving the distribution uniformity of the airflow in the air inlet section of the fan 20. In addition, after the conventional inclined smoke hood 10 is equipped with the fan 20, the position of the smoke exhaust pipe 30 connected to the air outlet of the fan 20 is offset and not centered due to the inclined setting of the volute 21 of the fan 20. When installing the gas equipment, it is necessary to distinguish between left and right installations, which affects the installation and appearance of the whole machine. In this embodiment, by making the angle φ between 36° and 40°, the end of the smoke exhaust pipe 30 with the smoke outlet 102 (for example, the straight pipe section 32 of the smoke exhaust pipe 30) can be centered without affecting the installation and appearance of the whole machine.

[0055] like Figures 1 to 3 As shown, the utility model also proposes a smoke exhaust device 100, which includes a smoke hood 10, a fan 20 and a smoke exhaust pipe 30. The fan 20 is installed on the support plate 11, and the fan 20 has an air inlet connected to the smoke outlet 102, and an air outlet connected to the air inlet; one end of the smoke exhaust pipe 30 is connected to the air outlet, and the other end of the smoke exhaust pipe 30 is provided with a smoke exhaust port 301. The specific structure of the smoke hood 10 refers to the above embodiment. Since the smoke exhaust device 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0056] The smoke exhaust device 100 can be applied to gas equipment. Figure 6 , the gas equipment may include a shell, a burner 300, a heat exchanger 400, a smoke exhaust device 100, and other control modules. Taking the forced extraction gas water heater as an example, the burner 300, the heat exchanger 400 and the smoke exhaust device 100 are sequentially arranged in the shell from bottom to top, and the smoke exhaust pipe 30 of the smoke exhaust device 100 is provided with a smoke exhaust port 301 at one end which passes through the top wall 213 of the shell. When the fan 20 is in operation, negative pressure is generated, so that the high-temperature flue gas generated by the combustion of the burner 300 flows toward the smoke inlet 101 of the smoke hood 10 after heat exchange through the heat exchanger 400. The smoke flows from the smoke outlet 102 of the smoke hood 10 to the air inlet of the fan 20, and is transported to the smoke exhaust pipe 30 through the air outlet of the fan 20, and finally discharged from the smoke exhaust port 301 of the smoke exhaust pipe 30. Combined with Figure 7 and Figure 8It can be seen that, compared with the traditional smoke exhaust device (smoke hood with a right-angle bending structure), the smoke hood 10 of the smoke exhaust device 100 of the present technical solution is set to a triangular pyramid structure, so that the volute 21 of the fan 20 can be tilted at a certain angle relative to the smoke inlet 101 of the smoke hood 10, which can improve the gas flow velocity distribution at the air inlet, and the guide plate 12 can better guide the airflow in the smoke collection chamber 103 to flow toward the smoke outlet 102 on the support plate 11, so that there is no right-angle bending structure to hinder the flow of air on the path where the smoke flows from the smoke inlet 101 to the air inlet of the fan 20, so that the airflow distribution of the air inlet section of the fan 20 is more uniform, which can effectively improve the heat exchange efficiency of the whole machine. And by optimizing the assembly structure of the smoke hood 10, compared with the smoke hood 10 with an integrated structure, the processing efficiency of the smoke hood 10 can be improved, the manufacturing cost can be reduced, and then the manufacturing cost of the smoke exhaust device 100 can be reduced. In order to facilitate the installation of the smoke exhaust device 100 and other components (such as a shell) of the gas equipment, the smoke exhaust device 100 may further include a bracket 40 connected to the smoke hood 10, and the smoke exhaust device 100 may be connected and fixed to other components (such as a shell) of the gas equipment through the bracket 40. For example, three brackets 40 are provided near the back plate of the shell of the smoke hood 10, and the three brackets 40 are arranged in a triangle, which can improve the assembly stability.

[0057] like Figure 2 As shown, in one embodiment, the smoke exhaust pipe 30 includes a curved pipe section 31 and a straight pipe section 32 connected by bending, one end of the curved pipe section 31 is connected to the air outlet, and the straight pipe section 32 is connected to the end of the curved pipe section 31 away from the air outlet, the axis of the straight pipe section 32 is perpendicular to the plane where the smoke inlet 101 is located, and the end of the straight pipe section 32 away from the curved pipe section 31 forms the smoke exhaust port 301. By making the smoke exhaust pipe 30 have a curved pipe section 31 and a straight pipe section 32, when the smoke exhaust device 100 is applied to a gas appliance, the straight pipe section 32 of the smoke exhaust pipe 30 can extend from the shell top wall 213 of the gas appliance and facilitate the central setting of the straight pipe section 32, so as to facilitate the installation of the gas appliance.

[0058] like Figure 6 As shown, the utility model also proposes a gas device, which includes a housing and a smoke exhaust device 100, wherein the smoke hood 10 and the fan 20 are arranged in the housing, and the smoke exhaust pipe 30 has one end provided with the smoke exhaust port 301 that penetrates the housing. The specific structure of the smoke exhaust device 100 refers to the above embodiment. Since the gas device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the gas device includes but is not limited to a gas water heater, a wall-mounted boiler, etc.

[0059] After the traditional inclined smoke hood is equipped with a fan, the fan's volute is tilted, so the position of the smoke exhaust pipe connected to the fan's outlet is offset and not centered. When installing the gas equipment, it is necessary to distinguish between left and right installations, which affects the installation and appearance of the whole machine. Figure 6 As shown, in one embodiment, the smoke exhaust pipe 30 has a straight pipe section 32 passing through the top wall 213 of the shell, and the projection point formed by the axis of the straight pipe section 32 on the top wall 213 is located at the center of the top wall 213. In other words, the projection of the smoke exhaust port 301 on the top wall 213 of the shell is centered, and the centered setting here should be understood as being centered in the front-to-back direction and the left-to-right direction of the top wall 213. In this way, the straight pipe section 32 of the smoke exhaust pipe 30 can be centered without affecting the installation and appearance of the whole machine.

[0060] like Figure 6 As shown, in one embodiment, the housing includes a first side wall 211 and a second side wall 212 that are opposite and spaced apart in the width direction, the fan 20 is located between the first side wall 211 and the support plate 11, and an installation space 201 for accommodating an extended functional module is formed between the side of the smoke collecting hood 10 where the guide plate 12 is provided and the second side wall 212. In this way, the space inside the housing of the gas equipment can be fully utilized, making the arrangement of the internal components of the gas equipment more compact, which is conducive to miniaturizing the volume of the gas equipment.

[0061] Furthermore, the burner 300, the heat exchanger 400 and the smoke exhaust device 100 of the gas equipment are arranged from bottom to top and are arranged close to the first side wall 211, the fan 20 is located in the area surrounded by the first side wall 211, the support plate 11 and the top wall 213 of the shell, and the smoke exhaust pipe 30 is located on the side of the fan 20 away from the first side wall 211. In this way, there is enough space between the main unit of the gas equipment and the second side wall 212 in the vertical direction to lay out the pipeline and expand the functional module, which is also conducive to the central arrangement of the smoke exhaust pipe 30.

[0062] For a gas water heater, the water inlet joint is generally arranged at the right side of the bottom wall of the shell, and the water outlet joint is arranged at the left side of the bottom wall of the shell. In order to adapt to the arrangement position of the water inlet and outlet joints, the burner 300, the heat exchanger 400 and the smoke exhaust device 100 of the gas equipment are usually arranged as a whole close to the left side wall of the shell. In order to make full use of the space in the shell as much as possible without changing the overall layout of the original machine, optionally, the first side wall 211 is the left side wall of the shell, and the second side wall 212 is the right side wall of the shell. In this way, the fan 20 can be just accommodated in the triangular area formed by the left side wall of the shell (that is, the first side wall 211), the support plate 11 and the top wall 213 of the shell, so that the fan 20 will not occupy the space on the right side of the shell, so that sufficient installation space 201 is reserved between the right side of the smoke hood 10 (that is, the side with the guide plate 12) and the right side wall of the shell (that is, the second side wall 212), so as to realize the installation of the extended functional module.

[0063] In addition, for traditional gas equipment, due to the structural limitations of the burner, the flame ejected by the burner usually tilts to the right at a certain angle, rather than vertically upward, which affects the combustion efficiency and heat exchange efficiency. In this embodiment, by arranging the fan 20 at the upper left corner of the smoke hood 10, when the fan 20 is running, the air pressure near the left side of the shell can be relatively low, so that the combustion flame generated by the burner 300 has a tendency to deflect to the left. Under the combined effect of the fan 20 and the structure of the burner 300 itself, the flame generated by the burner 300 tends to be vertical, which is conducive to achieving sufficient combustion and heat exchange.

[0064] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A smoke hood, characterized in that: include: A support plate is arranged at an inclination relative to the plane where the smoke inlet of the smoke collecting hood is located, the support plate is used to install the fan, and the support plate is provided with a smoke outlet for communicating with the air inlet of the fan; A guide plate connected to the support plate and arranged at an angle, wherein the angle between the guide plate and the support plate opens toward the smoke inlet; a first side plate, connecting the support plate and the guide plate; as well as a second side plate, opposite to and spaced from the first side plate, the second side plate connecting the support plate and the guide plate; The support plate, the first side plate, the guide plate, and the second side plate are assembled, connected, and surrounded to form a smoke collecting chamber, and the smoke collecting chamber is connected to the smoke inlet and the smoke outlet.

2. The smoke collecting hood according to claim 1, characterized in that: The guide plate is respectively connected to the first side plate and the second side plate through a sheet metal riveting structure; And / or, the support plate is respectively connected to the first side plate, the guide plate and the second side plate through a sheet metal riveting structure.

3. The smoke collecting hood according to claim 2, characterized in that: The first side plate is provided with a first riveted portion, the guide plate is provided with a first matching portion, and the first riveted portion and the first matching portion form a flanging riveted joint; the second side plate is provided with a second riveted portion, the guide plate is provided with a second matching portion, and the second riveted portion and the second matching portion form a flanging riveted joint; the support plate is provided with a third riveted portion, the first side plate, the guide plate and the second side plate are respectively provided with a third matching portion, and the third riveted portion and the third matching portion form a flanging riveted joint.

4. The smoke collecting hood according to claim 1, characterized in that: An air guide ring is arranged at the periphery of the smoke outlet, and the air guide ring is arranged on a side of the support plate away from the smoke collecting chamber, and the air guide ring is used to dock with and communicate with the air inlet of the fan.

5. The smoke collecting hood according to claim 4, characterized in that: The air guide ring and the support plate are integrally formed.

6. The fume hood according to any one of claims 1 to 5, characterized in that: The support plate has a support surface for supporting the fan, and an angle φ is formed between the support surface and the plane where the smoke inlet is located, wherein the angle φ is not less than 36° and not more than 40°.

7. A smoke exhaust device, characterized in that: include: The fume hood according to any one of claims 1 to 6; A fan, mounted on the support plate, the fan having an air inlet connected to the smoke outlet, and an air outlet connected to the air inlet; as well as A smoke exhaust pipe, one end of which is connected to the air outlet, and the other end of which is provided with a smoke exhaust port.

8. The smoke exhaust device according to claim 7, characterized in that: The smoke exhaust pipe includes a bent pipe section and a straight pipe section connected by a bending connection, one end of the bent pipe section is connected to the air outlet, and the straight pipe section is connected to the end of the bent pipe section away from the air outlet, the axis of the straight pipe section is perpendicular to the plane where the smoke inlet is located, and the end of the straight pipe section away from the bent pipe section forms the smoke exhaust port.

9. A gas equipment, characterized in that: It comprises a shell and the smoke exhaust device as claimed in claim 7 or 8, the smoke collecting hood and the fan are arranged in the shell, and one end of the smoke exhaust pipe provided with the smoke exhaust port passes through the shell.

10. The gas equipment according to claim 9, characterized in that: The smoke exhaust pipe has a straight pipe section passing through the top wall of the shell, and the projection point formed by the axis of the straight pipe section on the top wall is located at the center of the top wall.

11. The gas equipment according to claim 9 or 10, characterized in that: The shell includes a first side wall and a second side wall that are opposite and spaced apart in the width direction, the fan is located between the first side wall and the support plate, and an installation space for accommodating an extended functional module is formed between one side of the smoke hood where the guide plate is provided and the second side wall.

12. The gas equipment according to claim 11, characterized in that: The burner, heat exchanger and smoke hood of the gas equipment are arranged from bottom to top and are arranged close to the first side wall. The fan is located in the area formed by the first side wall, the support plate and the top wall of the shell. The smoke exhaust pipe is located on the side of the fan away from the first side wall.

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