A double-duct fan and its working method

Abstract

The present invention discloses a dual-duct fan and a working method thereof, wherein the dual-duct fan comprises a fan cavity, wherein the fan cavity comprises a symmetrically arranged duct one and duct two, wherein the duct one and duct two both comprise an air inlet, an air outlet, an impeller, a rotor, and a driving motor; the two air inlets are adjacently arranged and commonly connected to an air inlet cavity, wherein a rotating shaft is arranged in the air inlet cavity, and a baffle assembly is fixedly arranged on the rotating shaft for closing different air inlets following the rotation of the rotating shaft; by setting the air inlet cavity, a rotating shaft is arranged in the air inlet cavity, and a baffle assembly is fixedly arranged on the rotating shaft for closing different air inlets following the rotation of the rotating shaft for closing different air inlets, the air inlet of one of the air ducts can be closed while the other air inlet is running, thereby preventing the generation of air flow backflow in the other air duct when one air duct is running, thereby improving the energy consumption of the device.

Description

Technical Field

[0001] The invention relates to the field of fans, and in particular to a double-duct fan and a working method thereof. Background Art

[0002] Fans are widely used in various places in life. Current fans, especially high-speed fans, will generate a lot of heat during use. After long-term use, the high temperature generated will affect the life of internal parts, and the drive motor is also prone to damage after long-term operation.

[0003] In view of the above problems, some improvements have been proposed in the prior art, such as using a fan with dual air ducts, and the two fans are operated alternately to solve the above problems. However, the prior art still has the following problems:

[0004] 1. Some fans need to be installed between two devices to transport airflow, and their two air inlets need to be connected to the air outlet of the previous device at the same time. Since the two air ducts need to be used alternately, the two air inlets are often not equipped with shielding parts, resulting in one of the air ducts sucking in the airflow entering from the air outlet of the previous device and the airflow in the other air duct at the same time when it is in operation. The air outlets of the two air ducts are also connected to the air inlet of the next device. Often, some of the airflow flowing out of the air outlet will flow back to the air inlet from the other air duct. In this process, more energy will be lost, resulting in higher energy consumption of the device as a whole.

[0005] 2. A filter is often required to be installed at the air inlet of the fan to filter out some dust or impurities in the air. In a double-duct fan, a filter is installed in each duct, and the filter is fixedly installed inside the air inlet, which is inconvenient to disassemble and clean. Summary of the invention

[0006] Purpose of the invention: In order to overcome the problems existing in the prior art, the present invention provides a dual-duct fan and a working method thereof, by providing an air inlet cavity, a rotating shaft being provided in the air inlet cavity, and a baffle assembly being fixedly provided on the rotating shaft for rotating with the rotating shaft to close different air inlets, so that the air inlet of one air duct can be closed while the other air duct is running, thereby preventing the occurrence of air flow backflow in the other air duct when one air duct is running, thereby improving the energy consumption of the device.

[0007] To solve the above problems, the present invention adopts the following technical solutions:

[0008] A dual-duct fan includes a fan cavity, the fan cavity includes symmetrically arranged duct one and duct two, both duct one and duct two include an air inlet, an air outlet, an impeller, a rotor, and a drive motor; the two air inlets are adjacently arranged and commonly connected to an air inlet cavity, a rotating shaft is arranged in the air inlet cavity, and a baffle assembly is fixedly arranged on the rotating shaft to rotate with the rotating shaft to close different air inlets.

[0009] Furthermore, the air inlet cavity includes a cylindrical installation cavity perpendicular to the air inlet direction, one end of the installation cavity is connected to the two air inlets, and the other end is extended outward to be provided with an air inlet pipe, the axial direction of the air inlet pipe is aligned with the middle of the two air inlets, and the baffle assembly includes a first baffle and a second baffle fixedly arranged on the circumference of the rotating shaft, the angle between the first baffle and the second baffle is 120°, the distance A between the end of the first baffle away from the rotating shaft and the end of the second baffle away from the rotating shaft is greater than or equal to the diameter B of the air inlet pipe, and A is also greater than or equal to the sum of the diameter C of the two air inlets and the distance D between the two air inlets. Through this structure, when the first baffle or the second baffle is aligned with the middle of the two air inlets, the angle between the other baffle and the air inlet duct is an obtuse angle, which reduces the energy loss during air intake.

[0010] Furthermore, one end of the rotating shaft is rotatably connected to the inner wall of the air inlet cavity, and the other end extends to the outer end of the air inlet cavity and is provided with a slide groove inwardly, a control shaft coaxial with the rotating shaft is slidably connected in the slide groove, a connecting shaft is provided in the middle of the control shaft extending outwardly, a fixed shaft is provided on the connecting shaft toward the air inlet cavity, and a rotating block is provided at one end away from the slide groove, and four card slots adapted for the fixed shaft are also provided on the outer wall of the air inlet cavity, and the four card slots respectively correspond to the position of the first partition toward the position between the two air inlets, the position of the second partition toward the position between the two air inlets, the position of the first partition toward the middle of the air inlet pipe, and the position of the second partition toward the middle of the air inlet pipe when the fixed shaft is connected. This structure is convenient for fixing the rotating shaft, and each fixation corresponds to one air inlet situation.

[0011] Furthermore, a filter plate is fixedly arranged on the rotating shaft, and the angles between the filter plate and the first partition plate and the second partition plate are 120 degrees. A collecting tank is arranged at the bottom of the installation cavity, and a valve is arranged at the bottom of the collecting tank. The filter plate is arranged to filter the airflow, and at the same time, the filter plate can be swung when the rotating shaft rotates to change the air duct, and the dust or impurities on the filter plate can be swung away. The impurities can be collected by the collecting tank, which greatly increases the service life of the filter plate and reduces the frequency of cleaning or replacement.

[0012] Furthermore, a rotating block is fixedly provided at one end of the control shaft away from the slide slot, and a working condition diagram is provided on the rotating block. The working condition diagram includes reduced-size marks corresponding to the positions of the first partition, the second partition and the filter plate, that is, the reduced-size mark and the corresponding main body are located in the same circumference of the rotating shaft, so that the positions of the internal first partition, the second partition and the filter plate can be known at the outer end to understand the working condition of the internal air duct.

[0013] Furthermore, the two air outlets are arranged adjacent to each other and are commonly connected to an air outlet cavity.

[0014] Furthermore, the rotating shaft is arranged in the middle of the outer ends of the two air inlets, and the partition assembly includes a third partition fixedly connected to the rotating shaft. Different from the previously set installation cavity, this structure is directly installed in the middle of the two air inlets, which can avoid the setting of the installation cavity and can be directly connected to the air outlet of the previous device.

[0015] The present invention also discloses a working method of a double-duct fan, comprising the following steps:

[0016] S1: The fan is divided into two working states: A, single duct operation; B, double duct operation;

[0017] S2: Select A or B according to the air volume demand.

[0018] Further, in step S2, when A is selected according to the air volume demand, observe the positions of the first partition, the second partition and the filter plate marked in the reduced version on the working status diagram, adjust the first partition or the second partition to align with the position between the two air inlets, turn on the drive motor of the air duct connected to the reduced version mark, turn off the drive motor of the air duct after the air duct has run for a long time, adjust the other partition to align with the position between the two air inlets, turn on the other drive motor, and repeat the above steps at regular intervals.

[0019] Further, in step S2, when B is selected according to the air volume requirement, the first partition or the second partition is adjusted to a position aligned with the middle of the air inlet duct.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0021] 1. An air inlet cavity is provided, a rotating shaft is provided in the air inlet cavity, and a baffle assembly is fixedly provided on the rotating shaft to rotate with the rotating shaft to close different air inlets, so that the air inlet of one air duct can be closed while another air duct is running, thereby preventing the occurrence of air flow backflow in another air duct when one air duct is running, thereby improving the energy consumption of the device.

[0022] 2. The airflow is filtered by setting a filter plate. At the same time, the filter plate can be swung when the shaft rotates to change the air duct, so as to shake off the dust or impurities on the filter plate, and the impurities can be collected by cooperating with the collection groove, which greatly increases the service life of the filter plate and reduces the frequency of cleaning or replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an external structural diagram of a first embodiment of the present invention;

[0024] Figure 2 This is an internal structure diagram of a first embodiment of the present invention;

[0025] Figure 3 It is a perspective stereoscopic diagram of the air inlet cavity of the first embodiment of the present invention;

[0026] Figure 4 The operation diagram of the single air duct of the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 5 The operation diagram of the single air duct of the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0028] Figure 6 The operation diagram of the double air duct of the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 7 The operation diagram of the double air duct of the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 8 This is a schematic diagram of the operation of a single air duct in the second embodiment of the present invention;

[0031] Among them: 1. fan cavity; 11. air inlet; 12. air outlet; 13. impeller; 14. rotor; 15. drive motor; 2. air inlet cavity; 21. rotating shaft; 211. slide groove; 212. control shaft; 213. connecting shaft; 214. fixed shaft; 215. rotating block; 216. working status diagram; 221. first partition; 222. second partition; 223. filter plate; 23. installation cavity; 24. air inlet pipe; 26. slot. DETAILED DESCRIPTION

[0032] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0033] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other alternative features that are equivalent or have similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] like Figure 1-7 As shown, in the first embodiment of the present invention, a dual-duct fan includes a fan cavity, the fan cavity includes symmetrically arranged duct one and duct two, duct one and duct two both include a fan cavity 1, the fan cavity 1 includes an air inlet 11, an air outlet 12, an impeller 13, a rotor 14, and a drive motor 15; the two air inlets 11 are adjacently arranged and commonly connected to an air inlet cavity 2, a rotating shaft 21 is arranged in the air inlet cavity 2, and a partition assembly is fixedly arranged on the rotating shaft 21 for closing different air inlets by rotating with the rotating shaft.

[0036] In the following description, Figure 4-7 The air duct at the upper middle end is air duct one, and the air duct at the lower end is air duct two.

[0037] An air inlet cavity is provided, a rotating shaft is provided in the air inlet cavity, and a baffle assembly is fixedly provided on the rotating shaft for rotating with the rotating shaft to close different air inlets, so that the air inlet of one air duct can be closed while another air duct is running, thereby preventing the air flow backflow in another air duct when one air duct is running, thereby improving the energy consumption of the device.

[0038] In this embodiment, the air inlet cavity 2 includes a cylindrical mounting cavity 23 perpendicular to the air inlet direction, one end of the mounting cavity 23 is connected to the two air inlets 11, and the other end is extended outward to provide an air inlet pipe 24, and the axial direction of the air inlet pipe 24 is aligned with the middle of the two air inlets 11, and the partition assembly includes a first partition 221 and a second partition 222 fixedly arranged on the circumference of the rotating shaft, and the angle between the first partition 221 and the second partition 222 is 120°.

[0039] In this embodiment, the second partition is arranged in the counterclockwise direction of the first partition at 120°. It can be understood that if it is arranged in the clockwise direction, it will not affect the overall use of the device. The distance A between the end of the first partition 221 away from the rotating shaft and the end of the second partition 222 away from the rotating shaft is greater than or equal to the diameter B of the air inlet pipe 24, and A is also greater than or equal to the sum of the diameter C of the two air inlets 11 and the distance D between the two air inlets 11.

[0040] Through this structure, the above-mentioned size limitation allows the first partition to be aligned with the middle of the two air inlets, while the second partition is aligned with the upper right side of the installation cavity instead of the air inlet duct. At the same time, the angle between the first partition and the second partition is 120°, so that when the air is introduced, the airflow direction will not change significantly, thereby reducing the energy loss when the air is introduced.

[0041] In this embodiment, one end of the rotating shaft 21 is rotatably connected to the inner wall of the air inlet cavity 2, and the other end extends to the outer end of the air inlet cavity 2 and is provided with a slide groove 211 inwardly, and a control shaft 212 coaxial with the rotating shaft 21 is slidably connected in the slide groove 211, and a connecting shaft 213 is extended outward from the middle of the control shaft 212, and a fixed shaft 214 is provided on the connecting shaft toward the air inlet cavity, and a rotating block is provided at one end away from the slide groove. The outer wall of the air inlet cavity 2 is also provided with four card slots 26 adapted to the fixed shaft 214, and when the four card slots 26 are engaged with the fixed shaft 214, they respectively correspond to the position of the first partition toward the two air inlets 11 (the first working condition, only the air duct two is running), and the second partition toward the two air inlets. There are four situations: the position between the openings 11 (the second working condition, only air duct one is running), the position where the first partition is toward the middle of the air inlet pipe 24 (the third working condition, air duct one and air duct two are running at the same time, and the air flow path is installed at the upper end of the cavity), and the position where the second partition is toward the middle of the air inlet pipe 24 (the fourth working condition, air duct one and air duct two are running at the same time, and the air flow path is installed at the lower end of the cavity). When it is necessary to change the working condition of the air duct, it is only necessary to pull the control shaft 212 outward to drive the fixed shaft to disengage from the slot 26, and then rotate the control shaft 212 to drive the rotating shaft to rotate to other working conditions, and insert the fixed shaft 214 into different slots. This structure is used to facilitate fixing the rotating shaft, and each fixation corresponds to an air inlet condition.

[0042] In this embodiment, a filter plate 223 is fixedly arranged on the rotating shaft 21, and the angles between the filter plate 223 and the first partition plate 221 and the second partition plate 222 are both 120°. A collecting tank is arranged at the bottom of the installation cavity, and a valve is arranged at the bottom of the collecting tank. The filter plate is arranged to filter the airflow, and at the same time, the filter plate can be swung when the rotating shaft rotates to change the air duct, and the dust or impurities on the filter plate can be swung away. The impurities are collected by the collecting tank, which greatly increases the service life of the filter plate and reduces the frequency of cleaning or replacement. The angles between the filter plate and the first partition plate 221 and the second partition plate 222 are both 120°, and the angle between the first partition plate and the second partition plate is 120°, so that no matter which of the above working conditions corresponds to, the filter plate can filter the airflow along the way of the airflow.

[0043] In this embodiment, a rotating block 215 is fixedly provided at one end of the control shaft 212 away from the slide slot, and a working condition diagram 216 is provided on the rotating block 215, and the working condition diagram 216 includes a reduced version of the mark corresponding to the position of the first partition, the second partition and the filter plate. That is, the reduced version mark and its corresponding main body are located in the same circumference of the rotating shaft, so that the position of the internal first partition, the second partition and the filter plate can be known at the outer end to understand the working condition of the internal air duct. It is understandable that the working condition can also be directly marked at the slot position, and after the fixed shaft is inserted, the control of the drive motor is changed according to the marked working condition, that is, it is changed to the working condition at the slot.

[0044] In this embodiment, the two air outlets 12 are adjacently arranged and commonly connected to an air outlet cavity 3. A partition assembly can also be provided in the air outlet cavity to seal it to prevent the airflow from flowing out into another air duct when a single air duct is in operation.

[0045] In this embodiment, a working method of a dual-duct fan includes the following steps:

[0046] S1: The fan is divided into two working states: A, single duct operation; B, double duct operation;

[0047] S2: Select A or B according to the air volume demand.

[0048] Further, in step S2, when A is selected according to the air output demand, observe the positions of the first partition, the second partition and the filter plate marked on the reduced version of the working status diagram, adjust the first partition or the second partition to align with the position between the two air inlets, turn on the drive motor of the air duct connected on the reduced version mark, and after the air duct has been running for a long time (when one of the air ducts needs to be closed for cooling or maintenance), turn off the drive motor of the air duct, adjust the other partition to align with the position between the two air inlets, turn on the other drive motor, and repeat the above steps. The two air ducts can work in turn. Even if one of the air ducts fails, it will not affect the use of the device. At the same time, the temperature can be cooled in turn, thereby increasing the service life of the fan.

[0049] Further, in step S2, when B is selected according to the air volume requirement, the first partition or the second partition is adjusted to a position aligned with the middle of the air inlet duct. Generally, it does not matter whether the first partition or the second partition is aligned, the only difference is whether the airflow passes through the upper end or the lower end of the installation cavity.

[0050] like Figure 8As shown, in the second embodiment of the present invention, the rotating shaft 21 is arranged in the middle of the outer ends of the two air inlets, and the partition assembly includes a third partition 224 fixedly connected to the rotating shaft 21. The figure shows that the third partition closes the air duct. The overall working method is similar to that of embodiment 1 and will not be elaborated herein.

[0051] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to make the public understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the scope of protection of the present invention.

[0052] The above embodiments are not exhaustive enumerations of the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A double duct fan, characterized in that: The invention comprises a fan cavity (1), wherein the fan cavity (1) comprises a symmetrically arranged air duct 1 and an air duct 2, wherein the air duct 1 and the air duct 2 both comprise an air inlet (11), an air outlet (12), an impeller (13), a rotor (14), and a drive motor (15); the two air inlets (11) are arranged adjacent to each other and are commonly connected to an air inlet cavity (2); a rotating shaft (21) is arranged in the air inlet cavity (2), and a baffle assembly is fixedly arranged on the rotating shaft (21) for rotating with the rotating shaft to close different air inlets; the air inlet cavity (2) comprises a cylindrical installation cavity (23) perpendicular to the air inlet direction, and one end of the installation cavity (23) is connected to two The air inlets (11) are connected, and an air inlet pipe (24) is provided at the other end extending outward, and the axial direction of the air inlet pipe (24) is aligned with the middle of the two air inlets (11). The partition assembly comprises a first partition (221) and a second partition (222) fixedly arranged on the circumference of the rotating shaft, and the angle between the first partition (221) and the second partition (222) is 120°. The distance A between the end of the first partition (221) away from the rotating shaft and the end of the second partition (222) away from the rotating shaft is greater than or equal to the diameter B of the air inlet pipe (24), and A is also greater than or equal to the sum of the diameters C of the two air inlets (11) and the distance D between the two air inlets.

2. A dual-duct fan according to claim 1, characterized in that: One end of the rotating shaft (21) is rotatably connected to the inner wall of the air inlet cavity (2), and the other end extends to the outer end of the air inlet cavity (2) and is provided with a slide groove (211) inwardly. A control shaft (212) coaxial with the rotating shaft (21) is slidably connected in the slide groove (211). A connecting shaft (213) is provided in the middle of the control shaft (212) and extends outwardly. A fixed shaft (214) is provided on the connecting shaft toward the air inlet cavity, and a rotating block is provided at one end away from the slide groove. The outer wall of the air inlet cavity (2) is also provided with four slots (26) adapted to the fixed shaft (214). When the four slots (26) are engaged with the fixed shaft (214), they respectively correspond to four situations: the position of the first partition plate facing between the two air inlets (11), the position of the second partition plate facing between the two air inlets (11), the position of the first partition plate facing the middle of the air inlet pipe (24), and the position of the second partition plate facing the middle of the air inlet pipe (24).

3. A dual duct fan according to claim 2, characterized in that: A filter plate (223) is also fixedly mounted on the rotating shaft (21), and the angles between the filter plate (223) and the first partition plate (221) and the second partition plate (222) are all 120°. A collecting tank is disposed at the bottom of the installation cavity, and a valve is disposed at the bottom of the collecting tank.

4. A dual-duct fan according to claim 3, characterized in that: A rotating block (215) is fixedly arranged at one end of the control shaft (212) away from the slide slot, and a working condition diagram (216) is arranged on the rotating block (215). The working condition diagram (216) includes reduced version marks arranged corresponding to the positions of the first partition plate, the second partition plate and the filter plate.

5. The double-duct fan according to claim 1, characterized in that: The two air outlets (12) are arranged adjacent to each other and are commonly connected to an air outlet cavity (3).

6. A dual-duct fan according to claim 1, characterized in that: The rotating shaft (21) is arranged in the middle of the outer ends of the two air inlets, and the partition assembly comprises a third partition (224) fixedly connected to the rotating shaft (21).

7. A method for operating a dual-duct fan as claimed in claim 5, characterized in that: The following steps are involved: S1: The fan is divided into two working states: A, single duct operation; B, double duct operation; S2: Select A or B operation according to the air volume demand; In step S2, when A is selected according to the air volume demand, observe the positions of the first partition, the second partition and the filter plate marked in the reduced version on the working status diagram, adjust the first partition or the second partition to align with the position between the two air inlets, turn on the drive motor of the air duct connected to the reduced version mark, after the air duct has run for a long time, turn off the drive motor of the air duct, adjust the other partition to align with the position between the two air inlets, turn on the other drive motor, and repeat the above steps.

8. The operating method of the dual-duct fan according to claim 7, characterized in that: In step S2, when B is selected according to the air volume requirement, the first partition or the second partition is adjusted to a position aligned with the middle of the air inlet duct.

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