Air valve of new air fan and new air fan

Abstract

The present application relates to a wind valve of a fresh air blower and a fresh air blower. The wind valve of the fresh air blower includes a frame, a plurality of wind valve blades and a driving mechanism, the frame is provided with an air outlet, the wind valve blades are provided with an active rotating shaft, and the active rotating shaft extends to the outside of the frame along the length direction of the wind valve blades; the driving mechanism includes a motor connected to the frame, a connecting rod mechanism provided on the outside of the frame and a plurality of first rocker arms, the first rocker arm includes a first connecting arm and a first connecting end and a second connecting end located at both ends thereof, the second connecting end is used to connect the connecting rod mechanism, the first connecting end is used to connect the active rotating shaft, the motor is used to drive the plurality of wind valve blades to rotate through the connecting rod mechanism and the plurality of first rocker arms to open or close the air outlet; for any two adjacent wind valve blades, the lengths of the first connecting arms connected thereto are different, when the plurality of first rocker arms rotate the same arc under the action of the connecting rod mechanism, the plurality of wind valve blades will rotate to different angles to reduce wind resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of air valves for fresh air fans, and in particular to an air valve for fresh air fans and a fresh air fan. Background Art

[0002] The fresh air fan is provided with a fresh air circuit and a return air circuit inside, and air valves are provided on the air intake circuit and the exhaust circuit of the fresh air circuit, as well as on the air intake circuit and the exhaust circuit of the return air circuit. The opening angle of the air valve blades of the existing air valve is usually parallel to the air duct, or at a certain inclination angle to the air duct when the air valve blades are opened. However, the fresh air or return air entering the fresh air fan is disturbed by the action of the fan, which makes the wind resistance larger when passing through the air valve, generates larger noise, and increases the energy consumption of the fresh air fan. Summary of the invention

[0003] Based on this, an object of the present invention is to provide an air valve of a fresh air fan and a fresh air fan, which have the advantage of low wind resistance.

[0004] In the first aspect, the present invention provides a wind valve of a fresh air fan, comprising a frame, a plurality of wind valve blades and a driving mechanism, wherein the frame is provided with an air outlet, the wind valve blades are provided with an active rotating shaft, and the active rotating shaft extends to the outside of the frame along the length direction of the wind valve blades; the driving mechanism comprises a motor connected to the frame, a connecting rod mechanism and a plurality of first rocker arms arranged on the outside of the frame, the first rocker arm comprises a first connecting arm and a first connecting end and a second connecting end located at both ends of the first connecting arm, the second connecting end is used to connect the connecting rod mechanism, the first connecting end is used to connect the active rotating shaft, the motor is used to drive the plurality of wind valve blades to rotate through the connecting rod mechanism and the plurality of first rocker arms to open or close the air outlet; for any two adjacent wind valve blades, the lengths of the first connecting arms connected thereto are different.

[0005] For the air valve described in the present invention, when the plurality of first rocker arms rotate the same arc under the joint action of the connecting rod mechanism, the plurality of air valve blades will rotate at different angles due to the different lengths of the first connecting arms connected to the plurality of air valve blades, thereby reducing wind resistance.

[0006] Furthermore, for each of the damper blades, the length of the first connecting arm connected thereto gradually increases along the direction approaching the bottom of the frame, so that the rotation angles of the plurality of damper blades gradually decrease along the direction approaching the bottom of the frame.

[0007] Furthermore, the connecting rod mechanism includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the output shaft of the motor through a second rocker arm, and the other end of the first connecting rod is rotatably connected to the second connecting rod; the second connecting end of each first rocker arm is rotatably connected to the second connecting rod.

[0008] Furthermore, the first connecting end is provided with a first plug-in slot, and the active rotating shaft is plugged into the first plug-in slot; the second connecting end is provided with a first clamping piece, and the second connecting rod is provided with a first clamping hole, and the first clamping piece is clamped into the first clamping hole.

[0009] Furthermore, the second rocker arm includes a second connecting arm and a third connecting end and a fourth connecting end located at both ends thereof, the third connecting end is provided with a second plug-in slot, and the output shaft of the motor is plugged into the second plug-in slot; the fourth connecting end is provided with a second clamping piece, and the first connecting rod is provided with a second clamping hole, and the second clamping piece is clamped in the second clamping hole.

[0010] Further, the first connecting rod is rotatably connected to the second connecting rod through a first latch pin, a third latching hole is provided on the first connecting rod, a fourth latching hole is provided on the second connecting rod, and the first latch pin passes through the third latching hole and is latched in the fourth latching hole; or, the first latch pin passes through the fourth latching hole and is latched in the third latching hole.

[0011] Furthermore, the connecting rod mechanism includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the output shaft of the motor through a second pin, and the other end of the first connecting rod is rotatably connected to the second connecting rod; the second connecting end of each first rocker arm is rotatably connected to the second connecting rod.

[0012] Furthermore, the air valve also includes a limiting connecting rod, a hinge shaft is provided on the air valve blade, and a plurality of hinge grooves hinged to the hinge shaft and at least one limiting groove are provided on the limiting connecting rod, and the limiting groove is arranged between two adjacent hinge grooves. When the air valve blade rotates to open or close the air outlet, the lower end of the air valve blade rotates upward into the limiting groove or rotates downward out of the limiting groove.

[0013] Furthermore, the limiting groove includes an arc-shaped portion and a limiting portion. When the plurality of air valve blades rotate to open or close the air outlet, the lower ends of the air valve blades rotate upward along the arc-shaped portion into the limiting groove or rotate downward out of the limiting groove. After the lower ends of the air valve blades rotate into the limiting groove, the air valve blades abut against the limiting portion.

[0014] In a second aspect, the present invention further provides a fresh air fan, which includes the air valve of the fresh air fan described in the first aspect of the present invention.

[0015] In an embodiment of the present application, a connecting rod mechanism and a first rocker arm are driven by a motor to control the opening or closing of the air valve of the fresh air fan, and when the air valve of the fresh air fan is opened, its multiple air valve blades are set to open at different angles to adapt to the flow direction of the turbulent flow in the air duct, reduce the wind resistance when the air flow passes through the air valve, reduce the noise of the fresh air fan, and reduce the energy consumption of the fresh air fan; further, the length of the first connecting arm of the first rocker arm is gradually increased from top to bottom, so that the driving angle of the active rotating shaft of the connecting rod assembly driving the air valve blades becomes smaller, so that the opening angle of the air valve blades arranged from top to bottom gradually becomes smaller, which can further adapt to the flow direction of the turbulent flow in the air duct; the present application also realizes the linkage of the air valve blades by arranging a limiting connecting rod on the air valve blades, thereby enhancing the coordination of the air valve blades.

[0016] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an air valve of a fresh air fan in an exemplary embodiment of the present application;

[0018] Figure 2 for Figure 1 Exploded diagram of

[0019] Figure 3 This is a schematic structural diagram of a limit connecting rod in an exemplary embodiment of the present application;

[0020] Figure 4 This is a schematic structural diagram of a left frame in an exemplary embodiment of the present application;

[0021] Figure 5 This is a schematic structural diagram of a first rocker arm in an exemplary embodiment of the present application;

[0022] Figure 6 This is a schematic structural diagram of a first connecting rod in an exemplary embodiment of the present application;

[0023] Figure 7 This is a schematic structural diagram of a second connecting rod in an exemplary embodiment of the present application;

[0024] in, Figure 1-Figure 7 The accompanying drawings are:

[0025] 1. Air valve blade; 11. Active rotating shaft; 12. Driven rotating shaft; 13. Articulated shaft; 2. Motor; 3. First connecting rod; 31. Second clamping hole; 32. Third clamping hole; 4. Second connecting rod; 41. First clamping hole; 42. Fourth clamping hole; 5. First rocker arm; 51. First connecting arm; 52. First plug-in slot; 53. First clamping piece; 6. Second rocker arm; 7. First latch; 8. Limit connecting rod; 81. Articulated slot; 82. Limiting slot; 9. Left frame; 91. First through hole; 92. Second through hole; 10. Right frame; 14. Mounting slot; 15. Upper frame; 16. Lower frame; 17. Reinforcement rib. DETAILED DESCRIPTION

[0026] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0027] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0028] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0029] In addition, in the description of this application, unless otherwise specified, "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0030] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

[0031] The embodiment of the present application provides a wind valve of a fresh air fan, which is arranged in the air duct of the fresh air fan to open or close the air duct. The wind valve can be arranged at the air inlet and outlet on the surface of the fresh air fan to open or close the fresh air fan, or in some application scenarios, the fresh air fan is provided with multiple air ducts, and the wind valve can be arranged inside the fresh air fan to open or close one of the air ducts. In the traditional technology, the wind valve of the fresh air fan usually includes multiple wind valve blades. When the wind valve of the fresh air fan is opened, the multiple wind valve blades are opened together at the same angle. The opening angle can be parallel to the flow direction of the air duct, or at a certain inclination angle to the flow direction of the air duct. However, in many usage scenarios, the air duct may also be provided with components of a heat exchanger that act on the airflow. When the airflow passes through these components, turbulence is usually generated, that is, the airflow does not move forward in a direction parallel to the direction of the air duct. Therefore, when the airflow passes through multiple wind valve blades arranged in parallel, a large wind resistance and wind noise will be generated between the multiple wind valve blades and the turbulence.

[0032] Reference Figure 1 and Figure 2 In one embodiment, a wind valve of a fresh air fan provided in the present application includes a frame, a plurality of wind valve blades 1 and a driving mechanism. An air outlet is formed on the inner side of the frame for air to pass through. The plurality of wind valve blades 1 are arranged from top to bottom and are rotatably arranged in the air outlet. The driving mechanism is used to drive the plurality of wind valve blades 1 to open or close at the same time to open or close the air outlet.

[0033] Specifically, a driving rotating shaft 11 and a driven rotating shaft 12 are provided at both ends of the damper blade 1, and the driving rotating shaft 11 extends to the outside of the frame along the length direction of the damper blade 1, and the driven rotating shaft 12 is rotatably fixed to the inside of the frame.

[0034] The driving mechanism includes a motor 2 connected to the frame, a connecting rod mechanism arranged on the outside of the frame and a plurality of first rocker arms 5, the first rocker arm 5 includes a first connecting arm 51 and a first connecting end and a second connecting end located at both ends of the first connecting arm 51, the second connecting end is used to connect the connecting rod mechanism, the first connecting end is used to connect the active rotating shaft 11, the motor 2 is connected to the connecting rod mechanism, so that the motor 2 can drive the plurality of air valve blades 1 to rotate simultaneously through the connecting rod mechanism and the plurality of first rocker arms 5 to open or close the air outlet.

[0035] In the embodiments of this application, refer to Figure 2As shown, for any two adjacent air valve blades 1, the lengths of the first connecting arms 51 connected thereto are different. When the second connecting ends of the plurality of first rocker arms 5 rotate the same arc under the joint action of the connecting rod mechanism, since the lengths of the first connecting arms 51 connected to the plurality of air valve blades 1 are different, each air valve blade 1 can be rotated at a different angle. When the plurality of air valve blades 1 are opened at different angles, the wind resistance can be reduced to a certain extent.

[0036] Through experimental research by the inventor, it was found that after passing through the heat exchanger, the direction of the turbulence shows a certain changing trend from the top to the bottom of the air duct. Therefore, as a preferred embodiment of the present invention, for each air valve blade 1, the length of the first connecting arm 51 connected thereto gradually increases along the direction close to the bottom of the frame, so that the rotation angle of the multiple air valve blades 1 gradually decreases along the direction close to the bottom of the frame, so that the opening angle of the air valve blade 1 gradually changes from a certain inclination angle with the air duct to being parallel to the air duct, and the inclination angle gradually decreases, so that the overall opening angle of the air valve adapts to the influence of the turbulence, thereby significantly reducing wind resistance and wind noise.

[0037] Reference Figure 1 , Figure 2 and Figure 4 The frame includes a left frame 9, a right frame 10, an upper frame 15 and a lower frame 16, the left and right ends of the upper frame 15 are respectively connected to the upper end of the left frame 9 and the upper end of the right frame 10, and the left and right ends of the lower frame 16 are respectively connected to the lower end of the left frame 9 and the lower end of the right frame 10; and in order to improve the stability of the left frame 9, the right frame 10, the upper frame 15 and the lower frame 16 after being connected, refer to Figure 5 and Figure 6 , the upper and lower ends of the left frame 9 and the upper and lower ends of the right frame 10 are respectively provided with a mounting groove 14. When connected, the left and right ends of the upper frame 15 are respectively inserted into the mounting groove 14 at the upper end of the left frame 9 and the mounting groove 14 at the upper end of the right frame 10, and the left and right ends of the lower frame 16 are respectively inserted into the mounting groove 14 at the lower end of the left frame 9 and the mounting groove 14 at the lower end of the right frame 10; and, referring to Figure 1 and Figure 2 The upper frame 15 and the lower frame 16 have the same structure, and a cross-shaped reinforcing rib 17 is provided on the outer side surface of the upper frame 15 , so that the supporting strength of the upper frame 15 and the lower frame 16 can be increased by the reinforcing rib 17 .

[0038] It should be noted that in the embodiment of the present application, the direction close to the bottom of the frame is the direction from the upper frame 15 to the lower frame 16, and the embodiment of the present application does not limit the installation direction of the air valve. When the installation direction is adjusted in actual application, its up, down, left and right positional relationship can also be adjusted accordingly. The positional relationship mentioned in this application is not a specific limitation.

[0039] In this embodiment, the connecting rod mechanism includes a first connecting rod 3 and a second connecting rod 4, one end of the first connecting rod 3 is rotatably connected to the output shaft of the motor 2 through the second rocker arm 6, and the other end of the first connecting rod 3 is rotatably connected to the second connecting rod 4; the second connecting end of each first rocker arm 5 is rotatably connected to the second connecting rod 4.

[0040] Reference Figure 5 The first connecting end is provided with a first plugging groove 52, and a plurality of first through holes 91 are provided on the left frame 9. The active rotating shaft 11 passes through the first through hole 91 and is plugged into the first plugging groove 52; the second connecting end is provided with a first clamping piece 53, and a first clamping hole 41 is provided on the second connecting rod 4. The first clamping piece 53 is clamped into the first clamping hole 41.

[0041] In the present invention, the second rocker arm 6 includes a second connecting arm and a third connecting end and a fourth connecting end located at both ends thereof, the third connecting end is provided with a second plug-in slot, the left frame 9 is provided with a second through hole 92, and the output shaft of the motor 2 passes through the second through hole 92 and is plugged into the second plug-in slot; the fourth connecting end is provided with a second clamping piece, the first connecting rod 3 is provided with a second clamping hole 31, and the second clamping piece is clamped in the second clamping hole 31.

[0042] Moreover, refer to Figure 6 and Figure 7 The first connecting rod 3 is rotatably connected to the second connecting rod 4 through the first latch pin 7. The first connecting rod 3 is provided with a third latch hole 32, and the second connecting rod 4 is provided with a fourth latch hole 42. The first latch pin 7 passes through the third latch hole 32 and then latches in the fourth latch hole 42; or, the first latch pin 7 passes through the fourth latch hole 42 and then latches in the third latch hole 32.

[0043] In other embodiments, one end of the first connecting rod 3 is rotatably connected to the output shaft of the motor 2 via a second latch pin, and a third plugging slot is provided on the second latch pin.

[0044] Reference Figure 1-Figure 3 The air valve also includes a limit connecting rod 8, and a hinge shaft 13 is provided on the air valve blade 1. Figure 4 The limit link 8 is provided with a plurality of hinge grooves 81 hinged to the hinge shaft 13 and at least one limit groove 82. The limit groove 82 is arranged between two adjacent hinge grooves 81. When at least two air valve blades 1 rotate to open or close the air outlet, the lower end of the air valve blade 1 rotates upward into the limit groove 82 or rotates downward out of the limit groove 82, thereby preventing the air valve blade 1 from excessively rotating and being unable to rotate through the limit groove 82.

[0045] Reference Figure 3The limiting groove 82 includes an arc-shaped portion and a limiting portion. When the plurality of air valve blades 1 rotate to open or close the air outlet, the lower end of the air valve blade 1 rotates upward along the arc-shaped portion into or rotates downward out of the limiting groove 82, and when the lower end of the air valve blade 1 rotates into the limiting groove 82, the air valve blade 1 abuts against the limiting portion, so that the arc-shaped portion can guide the rotation direction of the air valve blade 1, and the limiting portion can prevent the air valve blade 1 from flipping over and failing to rotate.

[0046] In the fresh air fan and its air valve in the embodiment of the present application, the motor 2 drives the connecting rod mechanism and the first rocker arm 5 to control the opening or closing of the fresh air fan air valve, and when the air valve of the fresh air fan is opened, its multiple air valve blades 1 are set to open at different angles to adapt to the flow direction of the turbulent flow in the air duct, reduce the wind resistance when the air flow passes through the air valve, reduce the noise of the fresh air fan, and reduce the energy consumption of the fresh air fan; further, the length of the first connecting arm 51 of the first rocker arm 5 is gradually increased from top to bottom, so that the driving angle of the active rotating shaft 11 of the connecting rod assembly driving the air valve blade 1 gradually becomes smaller, so that the opening angle of the air valve blades 1 arranged from top to bottom gradually becomes smaller, which can further adapt to the flow direction of the turbulent flow in the air duct; the present application also realizes the linkage of the air valve blades 1 by arranging a limiting connecting rod 8 on the air valve blades 1, thereby enhancing the coordination of the air valve blades 1.

[0047] The above embodiments only express the preferred implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. A wind valve of a fresh air fan, characterized in that: The invention comprises a frame, a plurality of air valve blades and a driving mechanism, wherein an air outlet is formed on the inner side of the frame, an active rotating shaft is arranged on the air valve blade, and the active rotating shaft extends from the air outlet to the outer side of the frame along the length direction of the air valve blade; the driving mechanism comprises a motor connected to the frame, a connecting rod mechanism and a plurality of first rocker arms arranged on the outer side of the frame, the first rocker arm comprises a first connecting arm and a first connecting end and a second connecting end located at both ends of the first connecting arm, the second connecting end is used to connect the connecting rod mechanism, the first connecting end is used to connect the active rotating shaft, the motor is used to drive the plurality of air valve blades to rotate through the connecting rod mechanism and the plurality of the first rocker arms to open or close the air outlet; for any two adjacent air valve blades, the lengths of the first connecting arms connected thereto are different; For each of the damper blades, the length of the first connecting arm connected thereto gradually increases along a direction approaching the bottom of the frame.

2. The air valve of the fresh air blower according to claim 1, characterized in that: The connecting rod mechanism includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the output shaft of the motor through a second rocker arm, and the other end of the first connecting rod is rotatably connected to the second connecting rod; the second connecting end of each first rocker arm is rotatably connected to the second connecting rod.

3. The air valve of the fresh air blower according to claim 2 is characterized in that: The first connecting end is provided with a first plug-in slot, and the active rotating shaft is plugged into the first plug-in slot; the second connecting end is provided with a first clamping piece, and the second connecting rod is provided with a first clamping hole, and the first clamping piece is clamped into the first clamping hole.

4. The air valve of the fresh air blower according to claim 2 is characterized in that: The second rocker arm includes a second connecting arm and a third connecting end and a fourth connecting end located at both ends thereof, the third connecting end is provided with a second plug-in slot, and the output shaft of the motor is plugged into the second plug-in slot; the fourth connecting end is provided with a second clamping piece, and the first connecting rod is provided with a second clamping hole, and the second clamping piece is clamped in the second clamping hole.

5. The air valve of the fresh air blower according to claim 2, characterized in that: The first connecting rod is rotatably connected to the second connecting rod through a first latch pin, a third latching hole is provided on the first connecting rod, and a fourth latching hole is provided on the second connecting rod. The first latch pin passes through the third latching hole and is latched in the fourth latching hole; or, the first latch pin passes through the fourth latching hole and is latched in the third latching hole.

6. The air valve of the fresh air blower according to claim 1, characterized in that: The connecting rod mechanism includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the output shaft of the motor through a second pin, and the other end of the first connecting rod is rotatably connected to the second connecting rod; the second connecting end of each first rocker arm is rotatably connected to the second connecting rod.

7. The air valve of the fresh air fan according to any one of claims 1 to 6, characterized in that: The air valve also includes a limiting connecting rod, a hinge shaft is arranged on the air valve blade, a plurality of hinge grooves hinged to the hinge shaft and at least one limiting groove are arranged on the limiting connecting rod, and the limiting groove is arranged between two adjacent hinge grooves. When the air valve blade rotates to open or close the air outlet, the lower end of the air valve blade rotates upward into the limiting groove or rotates downward out of the limiting groove.

8. The air valve of the fresh air blower according to claim 7, characterized in that: The limiting groove includes an arc portion and a limiting portion. When the plurality of air valve blades rotate to open or close the air outlet, the lower ends of the air valve blades rotate upward along the arc portion into the limiting groove or rotate downward out of the limiting groove. After the lower ends of the air valve blades rotate into the limiting groove, the air valve blades abut against the limiting portion.

9. A new air blower, characterized in that: A wind valve for a fresh air fan comprising the air valve of any one of claims 1-8.

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