Burner blower

Abstract

The utility model discloses a burner blower which comprises a blower motor, a blower volute and a connecting cover. The blower volute has an impeller accommodating chamber and a blowing channel. And a blast impeller is arranged in the impeller accommodating chamber. The blower motor is in driving connection with the blower impeller. The air supply channel extends spirally and is provided with an air outlet communicating with the impeller containing chamber. The lower end of the impeller containing chamber is provided with an air inlet. A hollow connecting cavity is formed in the inner side of the connecting cover. And the upper end of the connecting cavity is communicated with the air inlet. The outer edge of the lower end of the connecting cavity is provided with a connecting end used for being fixedly connected with an external combustor. According to the combustor air blower, the connecting end is fixedly connected with the external combustor, when the air blowing motor drives the air blowing impeller to rotate at a high speed, air is driven by the blades to flow along the air supply channel and is blown out from the air outlet, and therefore negative pressure is formed at the air inlet, and the air flows to the impeller containing chamber from the connecting cavity. And waste gas generated by the combustor can be limited in the connecting cavity to realize up-draft emission.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, in particular to a burner blower. Background Art

[0002] Fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air intake of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and transporting grains, etc.

[0003] A blower generally drives air flow through an impeller to achieve blowing. A blower needs to be provided with an air inlet and an air outlet that are connected. When a blower in the prior art is used to extract air from a burner, it is directly arranged above the burner. The combustion exhaust gas will leak out between the blower and the burner, causing safety hazards to the gas water heater and users. Utility Model Content

[0004] The utility model aims to provide a burner blower to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The technical solutions adopted to solve the above technical problems are:

[0006] A burner blower, the burner blower having a central axis extending up and down, the burner blower comprising a blower motor, a blower volute and a connection cover arranged in sequence from top to bottom along the central axis;

[0007] The blast volute has a hollow inner cavity, the inner cavity includes an impeller accommodating chamber and an air supply channel; the impeller accommodating chamber is provided with a blast impeller, the blast motor is drivingly connected to the blast impeller; the air supply channel extends spirally around the central axis and has an air outlet communicated with the impeller accommodating chamber;

[0008] The lower end of the impeller accommodating chamber has an air inlet, the inner side of the connecting cover has a hollow connecting cavity, the upper end of the connecting cavity is connected to the air inlet, and the outer edge of the lower end of the connecting cavity has a connecting end for connecting and fixing with an external burner.

[0009] The burner blower provided by the utility model has at least the following beneficial effects: the connection end can be fixedly connected to an external burner. When the blower motor drives the blower impeller to rotate at a high speed, the air can be driven by the blades to flow along the air supply channel and blown out from the air outlet, thereby forming a negative pressure at the air inlet, so that the air flows from the connection cavity to the impeller accommodating chamber. The exhaust gas generated by the burner can be confined in the connection cavity by the connection cover, and can be discharged by suction.

[0010] As a further improvement of the above technical solution, the upper and lower ends of the blower volute are both in the shape of flat plates and are fixedly connected to the blower motor and the connecting cover respectively.

[0011] As a further improvement of the above technical solution, the connecting cover and the blast volute are both sheet metal products.

[0012] As a further improvement of the above technical solution, the blast volute includes a top plate, a bottom plate and a side shell, the side shell extends spirally around the central axis to form the air supply channel, the top plate and the bottom plate are respectively arranged at the upper and lower ends of the side shell and are sealed to the side shell.

[0013] As a further improvement of the above technical solution, the upper and lower edges of the side shell both have folded edges, and the edges of the top plate and the bottom plate both have edging that wraps the folded edges.

[0014] As a further improvement of the above technical solution, the connecting cover includes a main cover body and two side panels, the front and rear ends of the main cover body both extend downward, and the two side panels are respectively arranged at the left and right ends of the main cover body.

[0015] As a further improvement of the above technical solution, the blower motor includes a motor body and an output shaft, the output shaft and the blower impeller are both coaxially arranged with the central axis, and the blower impeller is fixedly connected to the end of the output shaft.

[0016] As a further improvement of the above technical solution, a plurality of supporting feet are provided between the motor body and the blower volute, the plurality of supporting feet are distributed circumferentially around the central axis, and the upper and lower ends of the supporting feet are fixedly connected to the motor body and the blower volute respectively.

[0017] As a further improvement of the above technical solution, the direction of the air outlet is perpendicular to the central axis, the air outlet is fixedly connected to an air outlet pipe, and the air outlet pipe has an air supply axis extending in a circular arc.

[0018] As a further improvement of the above technical solution, the cross-sectional shape of one end of the air outlet pipe and the air outlet is rectangular, and the cross-sectional shape of the other end of the air outlet pipe is circular. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0020] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the burner blower provided by the utility model;

[0021] Figure 2This is another three-dimensional schematic diagram of an embodiment of the burner blower provided by the utility model;

[0022] Figure 3 It is a side cross-sectional view of an embodiment of the burner blower provided by the utility model;

[0023] Figure 4 The utility model provides a burner blower, a top view of an embodiment thereof.

[0024] In the figure: 100, blower motor; 110, motor body; 120, output shaft; 130, support foot; 140, heat dissipation impeller; 200, blower volute; 210, top plate; 220, bottom plate; 230, side shell; 240, air inlet; 250, air outlet; 260, blower impeller; 300, connecting cover; 310, main cover body; 320, side plate; 330, connecting cavity; 340, connecting end; 350, connecting frame; 400, air outlet pipe; 510, folding edge; 520, hemming. DETAILED DESCRIPTION

[0025] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood to exclude the number, and above, below, within, etc. are understood to include the number.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Reference Figures 1 to 4 The burner blower of the utility model is made into the following embodiments:

[0030] A burner blower includes a blower motor 100, a blower volute 200 and a connection cover 300.

[0031] The burner blower has a central axis extending up and down. The blower motor 100, the blower volute 200 and the connecting cover 300 are arranged in sequence from top to bottom along the central axis. The blower motor 100 is arranged on the upper side of the blower volute 200, and the connecting cover 300 is arranged on the lower side of the blower volute 200.

[0032] The blast volute 200 has a hollow inner cavity, which includes an impeller accommodating chamber and an air supply passage that are interconnected.

[0033] The impeller accommodating chamber is provided with a blast impeller 260. The blast impeller 260 is in the shape of a disk, and has a plurality of blades evenly arranged in the circumferential direction. The impeller accommodating chamber is in the shape of a cylinder. The blast impeller 260 is coaxially arranged in the impeller accommodating chamber. The rotation axes of the blast impeller 260 and the impeller accommodating chamber both coincide with the central axis.

[0034] The blower motor 100 is drivingly connected to the blower impeller 260, so that the blower impeller 260 can rotate around its own rotation axis. The air supply channel extends in a spiral shape around the central axis.

[0035] The lower end of the impeller accommodating chamber has an air inlet 240, and the air inlet 240 is aligned with the blower impeller 260. The air supply channel has an air outlet 250 at one end away from the central axis.

[0036] The inner side of the connection cover 300 has a hollow connection cavity 330. The upper end of the connection cavity 330 is connected to the air inlet 240. The lower end outer edge of the connection cavity 330 has a connection end 340 for connecting to an external burner.

[0037] In actual use, the connection end 340 is fixedly connected to an external burner. The blower motor 100 drives the blower impeller 260 to rotate at a high speed, and the air is driven by the blades to flow along the air supply channel and blown out from the air outlet 250, thereby forming a negative pressure at the air inlet 240, so that the air flows from the connecting cavity 330 to the impeller accommodating chamber. The exhaust gas generated by the burner can be confined in the connecting cavity 330 by the connecting cover 300, and is discharged by upward suction through air extraction.

[0038] The upper and lower ends of the blast volute 200 are both in the shape of a flat plate perpendicular to the central axis. The blower motor 100 is connected to the upper end surface of the blast volute 200, and the connecting cover 300 is abutted against and fixedly connected to the lower end surface of the blast volute 200.

[0039] In the present embodiment, the connecting cover 300 and the blower volute 200 are both sheet metal products. Sheet metal is a comprehensive cold processing technology for metal thin plates, including shearing, punching / cutting / compounding, folding, riveting, splicing, forming, etc. Its notable feature is that the thickness of the same part is consistent. The connecting cover 300 and the blower volute 200 can be made of thin plates made of cold-rolled plates, galvanized steel plates or stainless steel. The connecting cover 300 and the blower volute 200 made of sheet metal have good strength, high durability, low production cost, stable size, and are suitable for mass production.

[0040] The blast volute 200 includes: a top plate 210, a bottom plate 220 and a side shell 230. The side shell 230 spirally extends around the central axis to form the outer side wall of the air supply channel, and the inner side of the air supply channel is connected to the impeller accommodating chamber. The top plate 210 is arranged on the upper side of the side shell 230, and the bottom plate 220 is arranged on the lower side of the side shell 230. The top plate 210 and the bottom plate 220 are both sealed and connected to the side shell 230.

[0041] When the blower motor 100 drives the blower impeller 260 to rotate, air can be transported along the air supply channel, and the spirally extended side shell 230 can confine the driven air within the air supply channel with less obstruction to the air.

[0042] In this embodiment, the edges of the upper and lower ends of the side shell 230 both have a folded edge 510 that is folded toward a side away from the central axis. In the projection in the up and down directions, the shape and size of the range enclosed by the side shell 230 are consistent with the shape and size of the top plate 210 and the bottom plate 220, and the edges of the top plate 210 and the bottom plate 220 both have a rim 520. The folded edge 510 is fixedly embedded in the rim 520. The side shell 230 can be fixedly connected to the top plate 210 and the bottom plate 220 by riveting or welding. The top plate 210 and the bottom plate 220 wrap the folded edge 510 with the rim 520 to prevent air leakage at the connection position of the edge of the side shell 230.

[0043] The air supply channel spirally extends on a horizontal plane perpendicular to the central axis, and the air outlet 250 is disposed between the top plate 210 and the bottom plate 220. The air outlet 250 is oriented perpendicular to the central axis and is tangent to the end of the air supply channel.

[0044] To facilitate exhaust gas discharge, in this embodiment, the air outlet 250 is fixedly connected to an air outlet pipe 400. The air outlet pipe 400 has an air supply axis extending in a circular arc. One end of the air outlet pipe 400 is connected to the air outlet 250, and the other end of the air outlet pipe 400 is arranged upward. After the exhaust gas is blown out from the horizontal air outlet 250, it can be discharged upward through the air outlet pipe 400.

[0045] The cross section of the air outlet 250 is rectangular, and the cross section of the lower end of the air outlet pipe 400 is also rectangular. The cross section of the upper end of the air outlet pipe 400 is circular. The air outlet pipe 400 can be connected to a circular hose, and the circular hose can be set according to the use scenario requirements to facilitate the flow and discharge of exhaust gas.

[0046] In this embodiment, the connecting cover 300 includes: a main cover body 310 and a side plate 320. The number of the side plates 320 is two. The air inlet of the blast volute 200 is connected to the middle part of the main cover body 310. The front and rear ends of the main cover body 310 both extend downward and enclose the connecting cavity 330 with the upper end of the main cover body 310. The two side plates 320 are respectively arranged at the left and right ends of the main cover body 310 and are fixedly connected to the main cover body 310.

[0047] The connection structure between the main housing 310 and the side plate 320 can refer to the connection structure between the side housing 230 and the top plate 210 and the bottom plate 220 in the blast volute 200. The upper end and the front and rear ends of the side plate 320 are provided with a folded edge 510, and the edge of the main housing 310 is provided with a hem 520 corresponding to the folded edge 510. The folded edge 510 of the side plate 320 is embedded in the hem 520 of the main housing 310 and fixed by riveting or welding.

[0048] The lower ends of the main cover body 310 and the side plate 320 are provided with the connecting end 340. In the present embodiment, the connecting end 340 of the main cover body 310 is a through hole extending forward and backward, and the connecting end 340 of the side plate 320 is a groove extending forward and backward. In actual use, the connecting cover 300 is engaged with the outer shell of the burner through the groove, and is fixedly connected by screws passing through the through hole. Furthermore, a connecting frame 350 is also provided on the outer side of the main cover body 310 and / or the side plate 320. The connecting cover 300 can be fixedly connected to the burner or the wall through the connecting frame 350.

[0049] In this embodiment, the blower motor 100 includes: a motor body 110 and an output shaft 120. The output shaft 120 is coaxially arranged with the central axis, that is, the output shaft 120 is coaxially arranged with the blower impeller 260. The motor body 110 is connected to the blower volute 200. The output shaft 120 can rotate relative to the motor body 110. The output shaft 120 is inserted into the upper end of the blower volute 200, one end of the output shaft 120 is arranged in the motor body 110, and the other end of the output shaft 120 is fixedly connected to the blower impeller 260.

[0050] The motor body 110 is connected to the blast volute 200 through the support legs 130. There are multiple support legs 130. In this embodiment, there are three support legs 130. The three support legs 130 are evenly distributed around the circumference of the central axis. The upper end of the support leg 130 is fixedly connected to the motor body 110, and the lower end of the support leg 130 is fixedly connected to the upper end surface of the blast volute 200. The motor body 110 and the blast volute 200 are separated by the support legs 130 to form a heat dissipation space to avoid heat accumulation.

[0051] In a further embodiment, a heat dissipation impeller 140 is provided in the heat dissipation space. The heat dissipation impeller 140 is coaxially fixedly sleeved on the output shaft 120. When the output shaft 120 rotates, it can drive the blower impeller 260 to rotate for blowing, and at the same time, it can drive the heat dissipation impeller 140 to rotate to achieve heat dissipation.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present invention have been shown and described, those skilled in the art may make various changes, modifications, substitutions and variations to these embodiments without departing from the principles and purpose of the present invention. These changes, modifications, equivalent variations or substitutions are all included in the scope defined by the claims of this application. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A burner blower having a central axis extending up and down, characterized in that: The burner blower comprises a blower motor, a blower volute and a connecting cover arranged in sequence from top to bottom along the central axis; The blast volute has a hollow inner cavity, the inner cavity includes an impeller accommodating chamber and an air supply channel; the impeller accommodating chamber is provided with a blast impeller, the blast motor is drivingly connected to the blast impeller; the air supply channel extends spirally around the central axis and has an air outlet communicated with the impeller accommodating chamber; The lower end of the impeller accommodating chamber has an air inlet, the inner side of the connecting cover has a hollow connecting cavity, the upper end of the connecting cavity is connected to the air inlet, and the outer edge of the lower end of the connecting cavity has a connecting end for connecting and fixing with an external burner.

2. The burner blower according to claim 1, characterized in that: The upper and lower ends of the blast volute are both in the shape of flat plates and are fixedly connected to the blast motor and the connecting cover respectively.

3. The burner blower according to claim 2, characterized in that: The connecting cover and the blast volute are both sheet metal products.

4. The burner blower according to claim 3, characterized in that: The blast volute comprises a top plate, a bottom plate and a side shell. The side shell extends spirally around the central axis to form the air supply channel. The top plate and the bottom plate are respectively arranged at the upper and lower ends of the side shell and are sealed to the side shell.

5. The burner blower according to claim 4, characterized in that: The upper and lower edges of the side shell both have folded edges, and the edges of the top plate and the bottom plate both have edging that wraps the folded edges.

6. The burner blower according to claim 3, characterized in that: The connecting cover comprises a main cover body and two side plates. The front and rear ends of the main cover body both extend downward, and the two side plates are respectively arranged at the left and right ends of the main cover body.

7. The burner blower according to claim 1, characterized in that: The blower motor comprises a motor body and an output shaft. The output shaft and the blower impeller are both coaxially arranged with the central axis. The blower impeller is fixedly connected to the end of the output shaft.

8. The burner blower according to claim 7, characterized in that: A plurality of supporting feet are provided between the motor body and the blast volute, and the plurality of supporting feet are distributed circumferentially around the central axis, and the upper and lower ends of the supporting feet are fixedly connected to the motor body and the blast volute respectively.

9. The burner blower according to claim 1, characterized in that: The air outlet is oriented perpendicular to the central axis, and the air outlet is fixedly connected to an air outlet pipe, and the air outlet pipe has an air supply axis extending in a circular arc.

10. The burner blower according to claim 9, characterized in that: The cross-sectional shapes of one end of the air outlet pipe and the air outlet are both rectangular, and the cross-sectional shape of the other end of the air outlet pipe is circular.

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