TWI888291B - Ventilation fan device - Google Patents

Abstract

A ventilation fan device includes a base, a fan set, and a wind guide set. The base includes a cover and a shell. The cover includes a first inlet and a first outlet. The shell includes a second outlet. The cover is combined with the shell. The fan set is installed in the shell and includes a housing and a centrifugal fan. The housing includes a second inlet and a wind passage connecting to the second inlet. The housing includes an airfoil guide block located in the wind passage. The centrifugal fan is placed in the housing. The wind guide set includes a stepping motor and a guide frame. The stepping motor is installed in the airfoil guide block. The guide frame is integrated into the wind passage and is driven by the motor

Description

Ventilation fan device

This case relates to an air conditioning device, and in particular to a thin ventilation fan device.

In current fan designs, in order to achieve precise control of the wind direction, the stepper motor and the air guide plate are usually placed outside the air duct. This arrangement helps to prevent the airflow from being disturbed by the stepper motor and makes the maintenance and operation of the air guide plate adjustment mechanism more convenient.

Specifically, the stepper motor and the air guide plate are installed outside the air duct, and usually a certain amount of space needs to be reserved around the air duct to accommodate these control components and their transmission mechanisms. When the volume of the fan is reduced, the space inside the air duct will become more limited, especially near the stepper motor and the air guide plate. The air duct may experience severe necking due to limited space. In addition, necking not only restricts the free flow of airflow, but also may increase the airflow resistance in the air duct, resulting in uneven airflow distribution and further affecting the performance of the fan.

In view of this, the applicant has conducted intensive research on the above-mentioned existing technologies and applied theoretical knowledge to try its best to solve the above-mentioned problems, which has become the goal of the applicant's improvement.

One purpose of the present invention is to provide a thin ventilation fan device to avoid increasing the air flow resistance in the air duct and maintain the performance of the fan.

In order to achieve the above-mentioned purpose, the present invention is a ventilation fan device, including a base, a fan unit and an air guide assembly. The base includes an outer cover and an outer shell, the outer cover is provided with a first air inlet and a first air outlet, the outer shell is provided with a second air outlet, and the outer cover is combined with the outer shell. The fan unit is placed in the outer shell, including a shell and a centrifugal fan. The shell has a second air inlet and an air duct connected to the second air inlet. The shell has an airfoil guide portion located in the air duct. The centrifugal fan is arranged in the shell. The air guide assembly includes a stepper motor and an air guide plate. The stepper motor is arranged in the airfoil guide portion. The air guide plate is arranged in the shell and driven by the stepper motor.

In one embodiment of the present case, the housing is provided with a circulation opening connected to the air duct, an exhaust opening connected to the second air outlet, and a rib between the circulation opening and the exhaust opening. The air guide plate can be rotatably arranged on one side of the centrifugal fan and can shield the exhaust opening or the circulation opening.

In one embodiment of the present case, the housing includes a base and a cover that cover each other, the centrifugal fan is arranged in the base, and the interior of the base is formed with an airfoil-shaped guide portion that protrudes toward the air duct.

In one embodiment of the present invention, the upper cover is concave on the other side of the airfoil guide portion outside the base to form a groove, and the stepper motor is installed in the groove outside the base.

In one embodiment of the present case, the airfoil guide portion includes a head section and a tail section extending from the head section, the head section is adjacent to the outer edge of the centrifugal fan, the tail section extends to the air duct and toward the exhaust opening, and the outer edge of the head section does not exceed the outer tangent line of the centrifugal fan.

In an embodiment of the present invention, the height of the airfoil guide portion gradually decreases from the front section toward the rear section, and the width of the airfoil guide portion also gradually decreases from the front section toward the rear section.

In one embodiment of the present case, the air guide plate includes a baffle plate and a first partition plate, a second partition plate and a third partition plate connected to the baffle plate. The first partition plate, the second partition plate and the third partition plate are arranged on one side of the baffle plate in the form of a first air guide groove, a second air guide groove and a third air guide groove arranged at intervals. A hinge is arranged at the end of the first partition plate, and a supporting shaft is arranged at the end of the second partition plate and the third partition plate. The air guide plate is pivotally connected to the airfoil guide portion of the base and the support shaft through the hinge, and is pivotally connected to the cover body, thereby combining the air guide plate with the air duct of the shell.

In one embodiment of the present case, the stepper motor includes a rotating shaft, and the airfoil guide portion is provided with an axial hole for the rotating shaft of the stepper motor to pass through the housing, and the axial hole is combined with a pivot at one end of the air guide plate.

In one embodiment of the present case, the air guide plate is driven by the stepper motor to rotate to the position of the circulation opening, the baffle plate covers the circulation opening, and the baffle rib covers the third air guide slot. The airflow generated by the centrifugal fan flows to the exhaust opening through the first air guide slot and the second air guide slot under the rectification of the airfoil guide portion and the guidance of the air guide plate, and finally flows out to the outside through the second air outlet.

In one embodiment of the present case, the air guide plate is driven by the stepper motor to rotate to the position of the exhaust opening, the baffle will cover the exhaust opening, and the airflow generated by the centrifugal fan will be guided by the rectifying air guide plate of the airfoil guide part, and will flow to the circulation opening through the first air guide slot, the second air guide slot and the third air guide slot, and then turn to flow through a heater to form hot air, and finally flow out from the first air outlet to the room.

Compared to the prior art, the ventilation fan device of this case combines the air guide plate in the air duct of the housing, and the housing is provided with an airfoil guide portion in the air duct; and when the ventilation fan device is in operation, the air guide plate is driven by the stepper motor to rotate, and can shield the circulation opening or exhaust opening of the housing, thereby, the airflow flows out to the outside or indoors under the rectification of the airfoil guide portion and the guidance of the air guide plate, thereby completing the ventilation exhaust or circulation intake operation. Accordingly, this case utilizes the rectification of the airfoil guide block and the guidance of the air guide plate to maintain a sufficient air duct cross section and air volume and pressure characteristics. Therefore, when the overall height of the ventilation fan device is reduced, the air flow resistance in the air duct can be reduced and uneven air flow distribution can be avoided. Therefore, the performance of the ventilation fan device during operation can be maintained without increasing the size of the exhaust duct, thereby increasing the practicality of the present invention.

The detailed description and technical content of this case are described below with the help of drawings. However, the attached drawings are only provided for reference and explanation and are not used to limit this case.

Please refer to FIG. 1 and FIG. 2, which are a three-dimensional schematic diagram of the appearance and a three-dimensional exploded schematic diagram of the ventilating fan device of the present invention. The ventilating fan device 1 of the present invention includes a base 10, a fan unit 20 and an air guide assembly 30. The fan unit 20 is installed in the base 10. The air guide assembly 30 is combined with the fan unit 20 to guide the air flow inside the fan unit 20. The structure of the ventilating fan device 1 is described in more detail as follows.

The base 10 includes an outer cover 11 and an outer shell 12. The outer cover 11 is provided with a first air inlet 111 formed by a plurality of grilles, and a first air outlet 112. The outer shell 12 is provided with a second air outlet 121. The fan unit 20 is installed in the outer shell 12, and the outer cover 11 is combined with the outer shell 12 to cover the fan unit 20. The fan unit 20 includes a housing 21 and a centrifugal fan 22.

Specifically, the housing 21 includes a base 212 and a cover 211 that are combined with each other. The centrifugal fan 22 is disposed on the base 212. A protruding airfoil guide portion 23 is formed inside the base 212, and a groove 24 is formed inwardly on the other side surface of the airfoil guide portion 23 (outside the base 212).

Furthermore, the air guide assembly 30 includes a stepper motor 31 and an air guide plate 32. The stepper motor 31 includes a rotating shaft 311, and the two ends of the air guide plate 32 are respectively provided with a pivot shaft 3201 and a supporting shaft 3202, and are combined in the housing 21 through the pivot shaft 3201 and the supporting shaft 3202. The stepper motor 31 is disposed in the groove 24 outside the base 212. The shaft 311 of the stepper motor 31 extends into the housing 21 through the shaft hole 230 in the groove 24 and is combined with the pivot 3201 at one end of the air guide plate 32 disposed in the housing 21, so that the air guide plate 32 is combined and disposed on the airfoil guide portion 23 and is driven by the stepper motor 31 to rotate. In this way, the air guide plate 32 can be rotatably disposed on one side of the centrifugal fan 22 and moved to a position close to and shielding an exhaust opening 216 or away from the exhaust opening 216. Housing

In this embodiment, the ventilating fan device 1 further includes a heater 40. The heater 40 is disposed in the base 10 and is located corresponding to the first air outlet 112.

Please refer to FIG. 3 and FIG. 4, which are a partial exploded schematic diagram of the ventilating fan device of the present invention and a combined plan schematic diagram of the ventilating fan device. In this embodiment, the housing 21 has a second air inlet 213, an air duct 214 connected to the second air inlet 213, a circulation opening 215 connected to the air duct 214, the exhaust opening 216 connected to the second air outlet 121, and a rib 217 located between the circulation opening 215 and the exhaust opening 216. In addition, the base 212 of the housing 21 has an airfoil guide 23 located in the air duct 214. The centrifugal fan 22 is disposed in the housing 21.

Specifically, the air guide plate 32 includes a baffle plate 321 and a first partition plate 322, a second partition plate 323 and a third partition plate 324 connected to the baffle plate 321. The first partition plate 322, the second partition plate 323 and the third partition plate 324 form a first air guide groove 325, a second air guide groove 326 and a third air guide groove 327 arranged at intervals on one side of the baffle plate 321. Furthermore, the hinge 3201 is arranged at the end of the first partition plate 322. The support shaft 3202 is arranged at the ends of the second partition plate 323 and the third partition plate 324. Accordingly, the air guide plate 32 is pivoted to the airfoil guide portion 23 of the base 212 through the pivot 3201 and pivoted to the cover 211 through the support shaft 3202 , thereby combining the air guide plate 32 in the air duct 214 of the housing 21 .

It should be noted that when the air guide plate 32 rotates to the position of the circulation opening 215, the baffle 321 will cover the circulation opening 215, and the baffle rib 217 will cover the third air guide groove 327, thereby guiding the air flow in the shell 21 to flow to the exhaust opening 216 under the guidance of the air guide plate 32 to achieve a ventilation effect.

In this embodiment, a protruding airfoil guide portion 23 is formed in the base 212. The airfoil guide portion 23 includes a head section 231 and a tail section 232 extending from the head section 231, and the height of the airfoil guide portion 23 gradually decreases from the head section 231 toward the tail section 232, and the width of the airfoil guide portion 23 also gradually decreases from the head section 231 toward the tail section 232. In addition, the head section 231 is adjacent to an outer edge of the centrifugal fan 22. The tail section 232 extends to the air duct 214 and faces the exhaust opening 216.

It should be noted that the housing 21 forms a groove 24 on the other side of the airfoil guide portion 23 for accommodating the stepper motor 31. Therefore, a shaft hole 230 is provided at the head section 231 of the airfoil guide portion 23 for the rotating shaft 311 of the stepper motor 31 to penetrate into the housing 21 and be combined with a pivot 3201 at one end of the air guide plate 32 disposed in the housing 21, so that the air guide plate 32 is driven to rotate by the stepper motor 31. In addition, in order to enable the air guide plate 32 to provide a larger exhaust area, the rotating shaft 311 of the stepper motor 31 is located as close to the center of the centrifugal fan 22 as possible. On the other hand, in addition, the outer edge of the airfoil guide portion 23 needs not to exceed an outer tangent line 220 (as shown in FIG. 4 ) of the centrifugal fan 22 to avoid affecting the flow field.

Please continue to refer to Figures 5 and 6, which are schematic diagrams of the wind field flow of the ventilation fan device of this case when performing ventilation and exhaust. The ventilation fan device 1 of this case includes two states when operating: ventilation and exhaust and circulating hot air. When the ventilation fan device 1 is performing ventilation and exhaust, indoor air flows into the centrifugal fan 22 from the first air inlet 111 of the outer cover 11. The air guide plate 32 is driven by the stepper motor 31 to rotate to the position of the circulation opening 215. At this time, the baffle 321 will cover the circulation opening 215, and the baffle rib 217 will cover the third air guide groove 327. In addition, the airflow generated by the centrifugal fan 22 flows into the air duct 214, and under the rectification of the airfoil guide portion 23 and the guidance of the air guide plate 32, flows through the first air guide groove 325 and the second air guide groove 326 to the exhaust opening 216, and finally flows out to the outside through the second air outlet 121 to complete the ventilation and exhaust operation.

Please refer to Figures 7 to 9, which are schematic diagrams of the wind field flow of the ventilation fan device of the present invention when circulating hot air. When the ventilation fan device 1 of the present invention circulates hot air, indoor air flows into the centrifugal fan 22 from the first air inlet 111 of the outer cover 11. The air guide plate 32 is driven by the stepper motor 31 to rotate to the position of the exhaust opening 216. At this time, the baffle 321 will cover the exhaust opening 216. Furthermore, the airflow generated by the centrifugal fan 22, under the rectification of the airfoil guide portion 23 and the guidance of the air guide plate 32, will pass through the first air guide groove 325, the second air guide groove 326 and the third air guide groove 327 and flow to the circulation opening 215, and then turn to flow through the heater 40 to form hot air, and finally flow out from the first air outlet 112 to the room to complete the circulation hot air operation.

It should be noted that when the ventilation fan device 1 of the present case circulates hot air, the airflow in the housing 21 will be rectified when passing through the air guide plate 32 and the heater 40, so that the airflow distribution after passing through the heater 40 is more uniform.

The above is only the preferred embodiment of this case and is not used to determine the patent scope of this case. Other equivalent variations that apply the patent spirit of this case should all fall within the patent scope of this case.

1: Ventilation fan device 10: Base 11: Cover 111: First air inlet 112: First air outlet 12: Housing 121: Second air outlet 20: Fan unit 21: Housing 211: Cover 212: Base 213: Second air inlet 214: Air duct 215: Circulation opening 216: Exhaust opening 217: Rib 22: Centrifugal fan 23: Airfoil guide 230: Shaft hole 231: Head section 232: Tail section 24: Groove 30: Air guide assembly 31: Stepper motor 311: Rotating shaft 32: Air guide plate 3201: pivot 3202: support shaft 321: baffle 322: first baffle 323: second baffle 324: third baffle 325: first air guide slot 326: second air guide slot 327: third air guide slot 40: heater

FIG. 1 is a three-dimensional schematic diagram of the ventilation fan device of the present invention.

FIG. 2 is a schematic diagram of a three-dimensional exploded view of the ventilation fan device of the present invention.

FIG. 3 is a partially exploded perspective view of the ventilation fan device of the present invention.

FIG. 4 is a schematic diagram of the assembled plan view of the ventilation fan device of the present invention.

FIG. 5 and FIG. 6 are schematic diagrams showing the wind flow of the ventilation fan device of the present invention when performing ventilation and exhaust.

FIG. 7 to FIG. 9 are schematic diagrams showing the wind flow of the ventilation fan device of the present invention when circulating hot air.

1: Ventilation fan device

10: Base

11: Outer cover

111: First air inlet

21: Shell

214: Air duct

215: Circular opening

216: Exhaust opening

22: Centrifugal fan

23: Airfoil guide part

31: Stepper Motor

32: Wind deflector

321:Block

Claims (10)

A ventilation fan device comprises: A base, including an outer cover and an outer shell, the outer cover is provided with a first air inlet and a first air outlet, the outer shell is provided with a second air outlet, and the outer cover is combined with the outer shell; A fan unit, installed in the outer shell, including a shell and a centrifugal fan, the shell has a second air inlet and an air duct connected to the second air inlet, the shell has an airfoil guide portion located in the air duct, and the centrifugal fan is arranged in the shell; and An air guide assembly, including a stepper motor and an air guide plate, the stepper motor is arranged in the airfoil guide portion, and the air guide plate is arranged in the shell and driven by the stepper motor. A ventilation fan device as described in claim 1, wherein the casing is provided with a circulation opening connected to the air duct, an exhaust opening connected to the second air outlet, and a rib located between the circulation opening and the exhaust opening, and the air guide plate can be rotatably arranged on one side of the centrifugal fan and can shield the exhaust opening or the circulation opening. A ventilation fan device as described in claim 2, wherein the housing includes a base and a cover that cover each other, the centrifugal fan is arranged in the base, and the interior of the base is formed with the wing-shaped guide portion that protrudes toward the air duct. A ventilation fan device as described in claim 3, wherein the other side of the airfoil guide portion is recessed on the outside of the base to form a groove, and the stepper motor is installed in the groove on the outside of the base. A ventilation fan device as described in claim 2, wherein the airfoil guide portion includes a head section and a tail section extending from the head section, the head section is adjacent to an outer edge of the centrifugal fan, the tail section extends to the air duct and toward the exhaust opening, and an outer end edge of the head section does not exceed an outer tangent line of the centrifugal fan. A ventilating fan device as described in claim 5, wherein the height of the airfoil guide portion gradually decreases from the head section toward the tail section, and the width of the airfoil guide portion also gradually decreases from the head section toward the tail section. A ventilation fan device as described in claim 3, wherein the air guide plate includes a baffle and a first partition plate, a second partition plate and a third partition plate connected to the baffle plate, the first partition plate, the second partition plate and the third partition plate are on one side of the baffle plate and form a first air guide groove, a second air guide groove and a third air guide groove arranged at intervals, a pivot is provided at the end of the first partition plate, a supporting shaft is provided at the end of the second partition plate and the third partition plate, the air guide plate is pivotally connected to the airfoil guide portion of the base through the pivot and the supporting shaft is pivotally connected to the cover body, thereby combining the air guide plate in the air duct of the shell. A ventilation fan device as described in claim 7, wherein the stepper motor includes a rotating shaft, the airfoil guide portion is provided with an axial hole for the rotating shaft of the stepper motor to pass through the casing, and the axial hole is combined with the pivot at one end of the air guide plate. A ventilation fan device as described in claim 7, wherein the air guide plate is driven by the stepper motor to rotate to the position of the circulation opening, the baffle plate covers the circulation opening, and the baffle rib covers the third air guide slot. The airflow generated by the centrifugal fan flows to the exhaust opening through the first air guide slot and the second air guide slot under the rectification of the airfoil guide portion and the guidance of the air guide plate, and finally flows out to the outside through the second air outlet. A ventilation fan device as described in claim 7, wherein the air guide plate is driven by the stepper motor to rotate to the position of the exhaust opening, the baffle plate covers the exhaust opening, and the airflow generated by the centrifugal fan, under the rectification of the airfoil guide portion and the guidance of the air guide plate, passes through the first air guide slot, the second air guide slot and the third air guide slot and flows to the circulation opening, then turns to flow through a heater to form hot air, and finally flows out from the first air outlet to the room.