Fan supply air quantity adjusting structure and fuel oil warmer with same

Abstract

The utility model provides a draught fan air inlet amount adjusting structure and a fuel oil warmer with the draught fan air inlet amount adjusting structure, the draught fan air inlet amount adjusting structure comprises a draught fan assembly, and the draught fan assembly comprises a motor, a wind wheel, a volute and an end cover; the wind wheel is arranged on the inner side of the volute, the motor is fixed to the outer side of the end cover, and an output shaft of the motor movably penetrates through the end cover, then extends into the volute and is coaxially fixed to the wind wheel. The draught fan air inlet amount adjusting structure further comprises a baffle. An air inlet channel is formed in the end cover, the baffle is used for shielding the air inlet channel, and the baffle is rotationally connected to the outer side of the end cover and attached to the end cover; when the baffle rotates relative to the end cover, the baffle is used for changing the shielding rate of the air inlet channel so as to change the air inlet amount of the fan assembly. The fuel oil heater comprises the draught fan air inlet amount adjusting structure. When air is supplied to the combustor in the fuel oil warmer, the air supply amount of the fan assembly can be adjusted, and therefore the sufficiency of fuel oil combustion in the combustor can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of fuel-fired heater technology, and more specifically, to a fan air intake adjustment structure and a fuel-fired heater having the same. Background Technology

[0002] A fuel-fired heater is a device that relies on the combustion of fuel oil to provide warmth. Due to its advantages of high heating efficiency and good heating effect, fuel-fired heaters are widely used in cold regions. Currently, Chinese Patent Publication No. CN216409094U discloses a fuel-fired heater with blue flame combustion. In this heater's structure, a centrifugal combustion-supporting fan provides air for combustion. However, in the aforementioned existing fuel-fired heaters, the intake and exhaust air volumes of the centrifugal combustion-supporting fan cannot be adjusted. Since the intake and exhaust air volumes of the centrifugal combustion-supporting fan directly affect the completeness of fuel combustion in the combustion device, if the fuel injection rate changes and the intake and exhaust air volumes of the centrifugal combustion-supporting fan cannot be adjusted, the fuel in the combustion device may not burn completely. This is detrimental to fuel conservation and environmental protection. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a fan air intake adjustment structure and a fuel oil heater having the same structure. When the fan assembly supplies air to the burner in the fuel oil heater, the air supply volume can be adjusted to ensure the complete combustion of fuel oil in the burner.

[0004] This utility model provides a fan air intake volume adjustment structure, including a fan assembly. The fan assembly includes a motor, a fan impeller, a volute, and an end cover fixed to one side of the volute and used to close the volute. The fan impeller is located inside the volute, and the motor is fixed to the outside of the end cover. The output shaft of the motor movably passes through the end cover and extends into the volute, where it is coaxially fixed with the fan impeller. The fan air intake volume adjustment structure also includes a baffle. An air intake channel is provided on the end cover, and the baffle is used to block the air intake channel. The baffle is rotatably connected to the outside of the end cover and fits against the end cover. When the baffle rotates relative to the end cover, it changes the blocking rate of the air intake channel to change the air intake volume of the fan assembly.

[0005] By adopting the above-described structure, this utility model allows for the adjustment of the air intake volume of the fan assembly when applied to a fuel-fired heater. This enables the fan assembly to adjust its output volume according to the combustion status of the burner in the fuel-fired heater. In other words, the fan assembly can adjust the air supply to the burner to meet the requirement of complete combustion of fuel in the burner, thereby ensuring the complete combustion of fuel in the burner, achieving the goals of fuel saving and environmental protection.

[0006] In one possible implementation, the baffle is coaxially arranged with the output shaft of the motor, and an air inlet hole is provided at the edge of the baffle, which is opposite to the air inlet channel; when the baffle rotates relative to the end cover, the baffle is used to change the overlap rate between the air inlet hole and the air inlet channel to change the air intake volume of the fan assembly.

[0007] In one possible implementation, the end cover is provided with a shaft hole, in which the output shaft of the motor is movably inserted; an annular boss protruding toward the motor side is provided at the edge of the shaft hole, and a through hole is provided in the middle of the baffle, which is rotatably engaged with the annular boss.

[0008] In one possible implementation, the fan air intake adjustment structure further includes a spring; the spring is sleeved on the output shaft of the motor and has a clearance fit with the output shaft of the motor; one end of the spring abuts against the inner end of the motor, and the other end of the spring abuts against the outer end face of the baffle, and the spring is used to press the baffle tightly against the outside of the end cover.

[0009] In one possible implementation, a lug is provided on the outer edge of the baffle, and a bent section is provided on the outer end of the lug, which bends away from the end cap.

[0010] In one possible implementation, the motor is fixed to the outside of the end cover by a number of circumferentially spaced support columns, with a lug located between two of the support columns. The support columns on both sides of the lug are used to abut against the lug to limit the rotation range of the baffle relative to the end cover.

[0011] In one possible implementation, the fan air intake adjustment structure further includes an air guide; the air guide is fixed to the inside of the end cover and is arranged opposite to the air intake channel, and the air guide is located inside the impeller in the radial direction; the air guide includes an air guide plate and a baffle plate disposed on one end of the air guide plate; the air guide plate is disposed on the side of the air guide plate away from the air outlet side of the impeller, and the air guide plate is inclined from the inside to the outside towards the side closer to the impeller in the radial direction of the impeller.

[0012] In one possible implementation, both the end of the air guide plate facing the end cover and the end of the air baffle plate facing the end cover are provided with folded edges, which are fixed to the inner wall of the end cover.

[0013] A fuel-fired heater includes a housing and a burner fixed to the housing. The fuel-fired heater also includes the aforementioned fan airflow adjustment structure, with a volute fixed to the housing and the air outlet of the volute connected to the air inlet of the burner. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a fuel-fired heater;

[0015] Figure 2 This is a three-dimensional structural diagram of the wind turbine assembly;

[0016] Figure 3 This is an exploded three-dimensional structural diagram of the first part of the wind turbine assembly.

[0017] Figure 4 This is an exploded three-dimensional structural diagram of the second part of the wind turbine assembly;

[0018] Figure 5 This is a three-dimensional structural diagram of the air guide component after it has been fixed to the end cap. Detailed Implementation

[0019] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0020] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0021] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] See Figure 1-5As shown in the figure, this application discloses a fan air intake adjustment structure, including a fan assembly. The fan assembly includes a motor 1, a fan wheel 2, a volute 3, and an end cover 4 fixed to one side of the volute 3 and used to close the volute 3. The fan wheel 2 is disposed inside the volute 3, and the motor 1 is fixed to the outside of the end cover 4. The output shaft of the motor 1 movably passes through the end cover 4 and extends into the volute 3 and is coaxially fixed with the fan wheel 2. The fan air intake adjustment structure also includes a baffle 5. An air intake channel 41 is provided on the end cover 4, and the baffle 5 is used to block the air intake channel 41. The baffle 5 is rotatably connected to the outside of the end cover 4 and fits against the end cover 4. When the baffle 5 rotates relative to the end cover 4, the baffle 5 is used to change the blocking rate of the air intake channel 41 to change the air intake volume of the fan assembly.

[0024] The baffle 5 is coaxially arranged with the output shaft of the motor 1, and an air inlet 50 is provided at the edge of the baffle 5, which is opposite to the air inlet channel 41. When the baffle 5 rotates relative to the end cover 4, the baffle 5 is used to change the overlap rate between the air inlet 50 and the air inlet channel 41 to change the air intake volume of the fan assembly. By adopting this baffle, since the baffle is coaxially arranged with the output shaft of the motor, the space occupied by the baffle and the motor on the outer wall of the end cover can be reduced. In addition, when the baffle rotates relative to the end cover, the baffle can change the overlap rate between the air inlet 50 and the air inlet channel to change the air intake volume of the fan assembly.

[0025] The end cover 4 is provided with a shaft hole 42, and the output shaft of the motor 1 is movably inserted in the shaft hole 42; an annular boss 43 protruding towards the motor 1 is provided at the edge of the shaft hole 42, and a through hole 51 is provided in the middle of the baffle 5, which is rotatably engaged with the annular boss 43; by adopting this structure, the baffle can be reliably rotated and connected to the end cover under the action of the through hole and the annular boss.

[0026] The fan air intake adjustment structure also includes a spring 6; the spring 6 is sleeved on the output shaft of the motor 1 and is clearance-fitted with the output shaft of the motor 1; one end of the spring 6 abuts against the inner end of the motor 1, and the other end of the spring 6 abuts against the outer end face of the baffle 5. The spring 6 is used to press the baffle 5 tightly against the outer side of the end cover 4. With this structure, under the action of the spring, the spring can reliably apply elastic force to the baffle so that the baffle is tightly attached to the outer side wall of the end cover, so as to avoid the baffle from detaching from the end cover.

[0027] The outer edge of the baffle 5 is provided with a lug 52, and the outer end of the lug 52 is provided with a bent section 53 that bends away from the end cover 4. With this structure, when the baffle needs to be rotated, the user's finger can abut against the bent section, and the baffle can be rotated by pushing the bent section, which makes it convenient to rotate the baffle.

[0028] The motor 1 is fixed to the outside of the end cover 4 by a number of circumferentially spaced support columns 11. The lug 52 is located between two of the support columns 11. The support columns 11 on both sides of the lug 52 abut against the lug 52 to limit the rotation range of the baffle 5 relative to the end cover 4. With the above structure, the motor can be reliably fixed to the outside of the end cover by the support columns. Each support column can be fixed to the end cover by bolts. The threaded part of each bolt passes through the end cover from the inside to the outside and is threaded to the inner end of the support column. In addition, since the lug is located between two of the support columns, when the baffle rotates, the support columns on both sides of the lug can abut against the lug to limit the rotation range of the baffle relative to the end cover. That is, the overlap rate of the air inlet and the air inlet channel can be adjusted within a certain range.

[0029] The fan air intake adjustment structure also includes an air guide 7; the air guide 7 is fixed on the inner side of the end cover 4 and is arranged opposite to the air intake channel 41, and the air guide 7 is located on the inner side of the impeller 2 in the radial direction; the air guide 7 includes an air guide plate 71 and a baffle plate 72 arranged on one end of the air guide plate 71; the air guide plate 71 is arranged on the side of the air guide plate 71 away from the air outlet side of the impeller 2, and the air guide plate 71 is inclined from the inside to the outside towards the side closer to the impeller 2 in the radial direction of the impeller 2; through the arrangement of the air guide, when the motor drives the impeller to rotate, the air guide plate can smoothly guide the air entering from the air intake channel to the inner side of the impeller in the axial direction, thereby facilitating the air intake of the air intake channel; through the arrangement of the baffle plate, when the motor drives the impeller to rotate, the baffle plate can prevent the air on the air outlet side of the impeller from flowing back to the air intake side of the impeller, and make the air only enter the volute from the air intake channel, thereby enabling the fan assembly to reliably draw air from the external environment.

[0030] Both the end of the air guide 71 facing the end cover 4 and the end of the air baffle 72 facing the end cover 4 are provided with a folded edge 73, which is fixed to the inner wall of the end cover 4. With this structure, the air guide can be reliably fixed to the inner wall of the end cover under the action of the folded edge, and the folded edge can be fixed to the inner wall of the end cover by screw fixing or welding fixing.

[0031] A fuel-fired heater includes a housing 8 and a burner 9 fixed on the housing 8. The fuel-fired heater also includes the aforementioned fan airflow adjustment structure. A volute 3 is fixed to the housing 8, and the air outlet of the volute 3 is connected to the air inlet of the burner 9. By adopting the aforementioned fan airflow adjustment structure, the airflow of the fan assembly can be adjusted as needed, thereby adjusting the airflow of the fan assembly, which in turn allows for adjustment of the airflow into the burner, thus enabling more complete combustion of the fuel in the burner.

[0032] In use, when the impeller in the fan assembly rotates under the drive of the motor, it draws air from the external environment through the air inlet channel and delivers it to the air outlet of the volute. At this time, the fan assembly can send air into the burner. When the baffle rotates relative to the end cover, the baffle can change the obstruction rate of the air inlet channel, thereby changing the air intake volume of the fan assembly and thus the air output volume. This allows the air supply volume of the fan assembly to the burner to be adjusted to meet the requirements of complete combustion of fuel in the burner, thereby ensuring the complete combustion of fuel in the burner, achieving the goals of fuel saving and environmental protection.

[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fan intake air volume adjustment structure, comprising a fan assembly, the fan assembly comprising a motor (1), a fan wheel (2), a volute (3), and an end cover (4) fixed to one side of the volute (3) for sealing the volute (3); the fan wheel (2) is disposed inside the volute (3), the motor (1) is fixed outside the end cover (4), and the output shaft of the motor (1) extends through the end cover (4) and into the volute (3), and is coaxially fixed with the fan wheel (2); characterized in that: The fan air intake adjustment structure also includes a baffle (5); an air intake channel (41) is provided on the end cover (4), and the baffle (5) is used to block the air intake channel (41). The baffle (5) is rotatably connected to the outside of the end cover (4) and fits against the end cover (4); when the baffle (5) rotates relative to the end cover (4), the baffle (5) is used to change the blocking rate of the air intake channel (41) to change the air intake volume of the fan assembly.

2. The fan air intake volume adjustment structure according to claim 1, characterized in that: The baffle (5) is coaxially arranged with the output shaft of the motor (1), and an air inlet hole (50) is provided at the edge of the baffle (5) opposite to the air inlet channel (41); when the baffle (5) rotates relative to the end cover (4), the baffle (5) is used to change the overlap rate between the air inlet hole (50) and the air inlet channel (41) to change the air intake volume of the fan assembly.

3. The fan air intake volume adjustment structure according to claim 1 or 2, characterized in that: The end cap (4) is provided with a shaft hole (42), and the output shaft of the motor (1) is movably inserted through the shaft hole (42); an annular boss (43) protruding towards the motor (1) is provided at the edge of the shaft hole (42), and a through hole (51) is provided in the middle of the baffle (5), and the through hole (51) is rotatably engaged with the annular boss (43).

4. The fan air intake volume adjustment structure according to claim 3, characterized in that: The fan air intake adjustment structure also includes a spring (6); the spring (6) is sleeved on the output shaft of the motor (1) and has clearance fit with the output shaft of the motor (1); one end of the spring (6) abuts against the inner end of the motor (1), and the other end of the spring (6) abuts against the outer end face of the baffle (5). The spring (6) is used to press the baffle (5) against the outside of the end cover (4).

5. The fan air intake volume adjustment structure according to claim 1, 2, or 4, characterized in that: The baffle (5) has a lug (52) on its outer edge, and the lug (52) has a bent section (53) on its outer end that bends away from the end cap (4).

6. The fan air intake volume adjustment structure according to claim 5, characterized in that: The motor (1) is fixed to the outside of the end cover (4) by a number of circumferentially spaced support columns (11). The lug (52) is located between two of the support columns (11). The support columns (11) on both sides of the lug (52) are used to abut against the lug (52) to limit the rotation range of the baffle (5) relative to the end cover (4).

7. The fan air intake volume adjustment structure according to claim 1, 2, 4, or 6, characterized in that: The fan air intake adjustment structure also includes an air guide (7); the air guide (7) is fixed on the inner side of the end cover (4) and is arranged opposite to the air intake channel (41), the air guide (7) is located on the inner side of the impeller (2) in the radial direction; the air guide (7) includes an air guide plate (71) and a baffle plate (72) arranged on one end of the air guide plate (71); the air guide plate (71) is arranged on the side of the air guide plate (71) away from the air outlet side of the impeller (2), and the air guide plate (71) is inclined from the inside to the outside towards the side closer to the impeller (2) in the radial direction of the impeller (2).

8. The fan air intake volume adjustment structure according to claim 7, characterized in that: The air guide plate (71) facing the end cover (4) and the wind baffle plate (72) facing the end cover (4) are both provided with folded edges (73), and the folded edges (73) are fixed on the inner side wall of the end cover (4).

9. A fuel-fired heater, comprising a housing (8) and a burner (9) fixed to the housing (8), characterized in that: The fuel-fired heater further includes a fan air intake adjustment structure as described in any one of claims 1-8, wherein the volute (3) is fixed to the housing (8), and the air outlet of the volute (3) is connected to the air inlet of the burner (9).

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