Parallel air outlet exhaust fan

Abstract

The parallel type air outlet exhaust fan comprises a fan body and a baffle, the fan body is provided with an inner channel and an outer channel which are communicated through a communication opening, the baffle is used for opening and closing the communication opening, the baffle is provided with two shaft connecting parts which are opposite in the radial direction of an air channel and rotationally connected with the fan body, and the baffle is divided into an upper blocking part and a lower blocking part through a connecting line of the two shaft connecting parts. The upper blocking part is provided with two upper blocking faces which are opposite front and back when the baffle closes the communicating opening, and the distance between the two upper blocking faces is gradually increased in the direction away from the lower blocking part. According to the utility model, the baffle plate is configured into the upper baffle part and the lower baffle part, the upper baffle part is provided with the two upper baffle surfaces which are opposite to each other front and back when the baffle plate closes the communication port, and the distance between the two upper baffle surfaces is gradually increased in the direction far away from the lower baffle part, so that the baffle plate has an upward overturning movement trend when the baffle plate is upwards overturned to open the communication port; therefore, the baffle can still be turned over upwards greatly under the condition that the air speed is low, the included angle between the baffle and the vertical face is increased, and the air outlet amount is increased.

Description

Technical Field

[0001] The utility model relates to an exhaust fan, in particular to a parallel-type air-discharging exhaust fan. Background Art

[0002] An exhaust fan is a device used to exchange indoor and outdoor gases, including a shell with an exhaust passage and a wind wheel arranged in the exhaust passage. The wind wheel is used to drive the gas to flow along the exhaust passage to achieve airflow exchange. In order to avoid the exchange of indoor and outdoor gases when the wind wheel stops rotating, a baffle rotatably connected to the shell is often arranged in the exhaust passage. When the wind wheel rotates, the baffle is pushed up by the airflow to open the exhaust passage, and when the wind wheel stops rotating, it is turned down by gravity to close the exhaust passage. In order to reduce wind noise, existing exhaust fans are developed in the direction of low wind speed and high air volume. However, since the thickness of the baffle is evenly distributed up and down, it is difficult for the baffle to turn up when the wind speed is low and the angle with the vertical plane is small (the smaller the angle between the baffle and the vertical plane, the smaller the air volume), resulting in a small air volume of the exhaust fan. Utility Model Content

[0003] The utility model aims to provide a parallel air outlet exhaust fan to solve the problem that the thickness of the existing baffle is evenly distributed up and down, the baffle is difficult to flip up when the wind speed is low and the angle with the vertical plane is small, resulting in a small air output of the exhaust fan.

[0004] The utility model is realized by the following technical solutions:

[0005] A parallel air outlet exhaust fan comprises a fan body with an air duct and a baffle arranged in the air duct, the baffle dividing the air duct into an inner channel and an outer channel connected through a connecting port, the baffle being rotatably connected to the fan body on one side of the connecting port for opening and closing the connecting port, the baffle having two axial connection parts which are radially opposite to each other and rotatably connected to the fan body in the air duct, the connecting line of the two axial connection parts divides the baffle into an upper baffle part and a lower baffle part, the direction of one axial connection part toward the other axial connection part is defined as a left-right direction, the upper baffle part has two upper baffle surfaces which are opposite to each other front and back when the baffle closes the connecting port, and the spacing between the two upper baffle surfaces gradually increases in the direction away from the lower baffle part.

[0006] Furthermore, among the two upper blocking surfaces, one of the upper blocking surfaces is inclined in a direction away from the lower blocking portion toward a direction away from the other upper blocking surface.

[0007] Furthermore, the value range of the included angle β between the two upper blocking surfaces is: 1° to 3°.

[0008] Furthermore, the lower stop portion has two lower stop surfaces which are opposite to each other front and back when the baffle closes the communication port, and the two lower stop surfaces are equidistantly distributed in a direction away from the upper stop portion.

[0009] Furthermore, among the two lower stop surfaces, one of the lower stop surfaces and the upper stop surface arranged on the same side constitute a stop surface, and the stop surface is parallel to the vertical surface when the baffle closes the communication port.

[0010] Furthermore, the upper baffle occupies 0.3 to 0.45 of the baffle.

[0011] Further, the lower stop portion has a lower swing portion inclined toward the inner track in a direction away from the upper stop portion, and the lower swing portion is located at an end of the lower swing portion away from the upper stop portion.

[0012] Furthermore, when the baffle closes the communication port, the angle α between the lower hem portion and the vertical plane is in the range of 45° to 55°.

[0013] Furthermore, the baffle is symmetrical on both sides; and / or the two axial connections are symmetrical on both sides; and / or the baffle has reinforcing ribs connecting the two axial connections; and / or the fan body is provided with a stop column in the inner channel to limit the baffle from flipping toward the inner channel.

[0014] Furthermore, a wind wheel that can rotate relative to the fan body is provided in the air duct. When the wind wheel rotates relative to the fan body, it drives the gas to flow from the inner channel toward the outer channel, causing the baffle to flip upward to open the connecting port.

[0015] The advantage of the present technical solution is that, by configuring the baffle into an upper baffle and a lower baffle, the upper baffle has two upper baffle surfaces which are opposite to each other front and back when the baffle closes the connecting port. Since the distance between the two upper baffle surfaces gradually increases in the direction away from the lower baffle (that is, the thickness of the upper baffle gradually increases in the direction away from the lower baffle), the upper baffle has a tendency to flip upward when the baffle flips upward to open the connecting port, so that the baffle can still flip upward significantly under low wind speed conditions, increase the angle between the baffle and the vertical plane, and even turn the baffle to a position parallel to the air outlet direction, thereby increasing the air outlet volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0018] Figure 1 is a three-dimensional diagram of a parallel air outlet exhaust fan disclosed in an embodiment;

[0019] Figure 2 is a cross-sectional view of a parallel air outlet exhaust fan disclosed in an embodiment;

[0020] Figure 3 is a three-dimensional diagram of a baffle in an embodiment;

[0021] Figure 4 is a front view of the baffle in the embodiment;

[0022] Figure 5 is a side view of the baffle in the embodiment. DETAILED DESCRIPTION

[0023] 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 in 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.

[0024] Example: Figure 1-5As shown, the parallel air outlet exhaust fan comprises a fan body 1 having an air duct 101, a baffle 2 arranged in the air duct 101 and a wind wheel 3 arranged in the air duct 101, the baffle 2 divides the air duct 101 into an inner channel 102 and an outer channel 103 connected through a connecting port 104, the baffle 2 is rotatably connected to the fan body 1 at one side of the connecting port 104 for opening and closing the connecting port 104, the baffle 2 has two shaft connecting parts 201 rotatably connected to the fan body 1 in the radial direction of the air duct 101, and the connecting line of the two shaft connecting parts 201 divides the baffle 2 into an upper baffle part 202 and a lower baffle part 203. The blocking portion 203, the direction from one shaft connection portion 201 to the other shaft connection portion 201 is defined as the left and right direction, the upper blocking portion 202 has two upper blocking surfaces 204 that are opposite to each other front and back when the baffle plate 2 closes the connecting port 104, and the spacing between the two upper blocking surfaces 204 gradually increases in the direction away from the lower blocking portion 203, the wind wheel 3 can rotate relative to the fan body 1 to drive the gas to flow from the inner channel 102 to the outer channel 103, so that the baffle plate 2 flips upward to open the connecting port 104, and when the wind wheel 3 stops rotating, the baffle plate 2 flips downward under the action of gravity to close the connecting port 104. The present embodiment provides a parallel air outlet exhaust fan to solve the problem that the thickness of the existing baffle is evenly distributed up and down, the baffle is difficult to flip up when the wind speed is low, and the angle between the baffle and the vertical plane is small, resulting in a small air outlet of the exhaust fan. The baffle 2 is mainly configured into an upper baffle 202 and a lower baffle 203. The upper baffle 202 has two upper baffle surfaces 204 that are opposite to each other front and back when the baffle 2 closes the connecting port 104. Since the spacing between the two upper baffle surfaces 204 gradually increases in the direction away from the lower baffle 203 (that is, the thickness of the upper baffle 2 gradually increases in the direction away from the lower baffle 203), the upper baffle 202 makes the baffle 2 have a tendency to flip upward when the baffle 2 flips upward to open the connecting port 104, so that the baffle 2 can still flip upward significantly when the wind speed is low, increase the angle between the baffle 2 and the vertical plane, and even make the baffle 2 turn to a position parallel to the air outlet direction, thereby increasing the air outlet.

[0025] In the embodiment of the utility model, one of the two upper blocking surfaces 204 is inclined in a direction away from the lower blocking portion 203 toward a direction away from the other upper blocking surface 204. The above arrangement is configured to be inclined in a direction away from the lower blocking portion 203 toward a direction away from the other upper blocking surface 204, so that the distance between the two upper blocking surfaces 204 gradually increases in a direction away from the lower blocking portion 203, and the structure is simple and easy to implement.

[0026] In the embodiment of the present utility model, the value range of the included angle β between the two upper blocking surfaces 204 is: 1° to 3°.

[0027] In the embodiment of the utility model, the lower baffle 203 has two lower baffle surfaces 205 which are opposite to each other when the baffle 2 closes the communication port 104, and the two lower baffle surfaces 205 are equidistantly distributed in the direction away from the upper baffle 202. The above arrangement configures the lower baffle 203 to have a uniform thickness distribution, and the weight of the upper baffle 202 and the lower baffle 203 is reasonable, so that the baffle 2 can be greatly turned up when the wind speed is low, and the baffle 2 is prevented from turning up excessively to affect the air volume.

[0028] In the embodiment of the utility model, of the two lower blocking surfaces 205, the lower blocking surface 205 and the upper blocking surface 204 arranged on the same side form a stop surface 206, and the stop surface 206 is parallel to the vertical surface when the baffle 2 closes the communication port 104. Since the lower blocking surface 205 and the upper blocking surface 204 arranged on the same side form the stop surface 206 parallel to the vertical surface when the baffle 2 closes the communication port 104, the overall structure of the baffle 2 is compact and reasonable, and the implementation is convenient.

[0029] In the embodiment of the utility model, the upper baffle 202 accounts for 0.3-0.45 of the baffle 2. Since the upper baffle 202 accounts for 0.3-0.45 of the baffle 2, the upper baffle 202 and the lower baffle 203 are properly weighted, so that the baffle 2 can be greatly turned up when the wind speed is low, and the baffle 2 is prevented from turning up excessively.

[0030] In the embodiment of the utility model, the lower stopper 203 has a lower swing portion 207 inclined toward the inner road 102 in a direction away from the upper stopper 202, and the lower swing portion 207 is located at one end of the lower swing portion 207 away from the upper stopper 202. Since the lower stopper 203 has the lower swing portion 207 inclined toward the inner road 102 in a direction away from the upper stopper 202, the baffle 2 can be quickly flipped down and reset when the wind wheel 3 stops rotating.

[0031] In the embodiment of the utility model, when the baffle 2 closes the communication port 104, the angle α between the lower hem portion 207 and the vertical plane is in the range of 45° to 55°.

[0032] In the embodiment of the utility model, the baffle 2 is symmetrical, and the two shaft connecting parts 201 are symmetrical. Since the baffle 2 is symmetrical, the baffle 2 is evenly stressed up and down and left and right, and the flipping effect is good.

[0033] In the embodiment of the utility model, the fan body 1 is provided with a stop post 100 in the inner channel 102 to limit the baffle plate 2 from turning toward the inner channel 102 .

[0034] In the embodiment of the utility model, the baffle plate 2 has a reinforcing rib 208 connecting the two shaft connecting parts 201. Since the baffle plate 2 has the reinforcing rib 208 connecting the two shaft connecting parts 201, the baffle plate 2 has good structural strength and good anti-bending and anti-deformation capabilities.

[0035] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center of a circle", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions 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.

[0036] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the utility model is not limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or some technical deductions or replacements made on the premise of the concept of the utility model should be regarded as the protection of the utility model.

Claims

1. A parallel air outlet exhaust fan, comprising a fan body having an air duct and a baffle disposed in the air duct, wherein the baffle divides the air duct into an inner channel and an outer channel connected via a communication port, and the baffle is rotatably connected to the fan body at one side of the communication port for opening and closing the communication port, characterized in that: The baffle plate has two axial connection parts which are radially opposite to each other in the air duct and are rotatably connected to the fan body. The connecting line of the two axial connection parts divides the baffle plate into an upper baffle part and a lower baffle part. The direction of one axial connection part toward the other axial connection part is defined as the left and right direction. The upper baffle part has two upper baffle surfaces which are opposite to each other front and back when the baffle plate closes the connecting port. The spacing between the two upper baffle surfaces gradually increases in the direction away from the lower baffle part.

2. The parallel air outlet exhaust fan according to claim 1, characterized in that: Of the two upper blocking surfaces, one upper blocking surface is inclined in a direction away from the lower blocking portion toward a direction away from the other upper blocking surface.

3. The parallel air outlet exhaust fan according to claim 1 or 2, characterized in that: The value range of the included angle β between the two upper blocking surfaces is: 1°~3°.

4. The parallel air outlet exhaust fan according to claim 1, characterized in that: The lower stop portion has two lower stop surfaces which are opposite to each other front and back when the baffle closes the communication port, and the two lower stop surfaces are equidistantly distributed in a direction away from the upper stop portion.

5. The parallel air outlet exhaust fan according to claim 4, characterized in that: Of the two lower stop surfaces, one lower stop surface and the upper stop surface arranged on the same side form a stop surface, and the stop surface is parallel to the vertical surface when the baffle closes the communication port.

6. The parallel air outlet exhaust fan according to claim 1, characterized in that: The upper baffle occupies 0.3 to 0.45 of the baffle.

7. The parallel air outlet exhaust fan according to claim 1, characterized in that: The lower stop portion has a lower swing portion inclined toward the inner track in a direction away from the upper stop portion, and the lower swing portion is located at one end of the lower swing portion away from the upper stop portion.

8. The parallel air outlet exhaust fan according to claim 7, characterized in that: The value range of the angle α between the lower hem portion and the vertical plane when the baffle closes the communicating opening is: 45° to 55°.

9. The parallel air outlet exhaust fan according to claim 1, characterized in that: The baffle is bilaterally symmetrical; and / or the two axial connections are bilaterally symmetrical; and / or the baffle has reinforcing ribs connecting the two axial connections; and / or the fan body is provided with a stop column in the inner channel to limit the baffle from turning toward the inner channel.

10. The parallel air outlet exhaust fan according to claim 1, characterized in that: The wind duct is provided with a wind wheel that can rotate relative to the fan body. When the wind wheel rotates relative to the fan body, it drives the gas to flow from the inner channel to the outer channel, so that the baffle is turned upward to open the communication port.

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