Airflow control device and exhaust device

Abstract

The utility model discloses an exhaust device with an airflow control device, the airflow control device comprises an outer pipe and an inner pipe, the outer pipe is provided with an air outlet passage, a flow guide passage, a first air inlet passage and a second air inlet passage, the inner pipe extends from the first air inlet passage to the air outlet passage through the flow guide passage, and the inner pipe is provided with an inner flow passage communicated with the first air inlet passage and the air outlet passage. The outer wall of the inner pipe and the inner wall of the flow guide channel are arranged at intervals to form an outer flow channel communicating with the air outlet channel and the second air inlet channel. The airflow control device is provided with the outer pipe and the inner pipe, the inner pipe extends into the inner pipe of the air outlet channel from the first air inlet channel through the flow guide channel, and the inner pipe is provided with the inner flow channel communicated with the first air inlet channel and the air outlet channel and is matched with the flow guide channel to form the outer flow channel communicated with the second air inlet channel and the air outlet channel. The ends, close to the air outlet channel, of the inner flow channel and the outer flow channel form pressure difference when one exhaust fan is started and the other exhaust fan is closed, air flows to the air outlet channel from the first airflow channel and the second airflow channel, the situation that the exhaust effect is affected by air backflow is avoided, and the exhaust effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust systems, in particular to an airflow control device and an exhaust device. Background Art

[0002] The exhaust system is a device used to pump indoor air to the outside to speed up the indoor air flow. It is used in kitchens and bathrooms. The exhaust system includes an exhaust pipe group connecting the indoor and outdoor and an exhaust fan installed on the exhaust pipe group. In order to simplify the exhaust pipeline and improve the exhaust efficiency, the exhaust pipe group is configured into multiple inlet pipes and outlet pipes connected to each inlet pipe, and each inlet pipe is equipped with an exhaust fan. Since each inlet pipe is connected to the outlet pipe, when the exhaust fan on one inlet pipe is working and the exhaust fans on the other inlet pipes are turned off, part of the airflow in the pipe is discharged from the outlet pipe and the other part is discharged from the other inlet pipes. Some gas reflux affects the exhaust effect. Utility Model Content

[0003] The utility model aims to provide an airflow control device to solve the problem that in the existing exhaust system, since the outlet pipe is connected to multiple intake pipes, when the exhaust fan on one intake pipe is working and the exhaust fans on the other intake pipes are turned off, part of the gas flows back from the other intake pipes, affecting the exhaust effect.

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

[0005] An airflow control device comprises an outer tube and an inner tube, wherein the outer tube has an air outlet, a flow guide, a first air inlet and a second air inlet, and the inner tube extends from the first air inlet through the flow guide to the air outlet, and the inner tube has an inner flow channel connecting the first air inlet and the air outlet, and the outer wall of the inner tube is spaced apart from the inner wall of the flow guide to form an outer flow channel connecting the air outlet and the second air inlet.

[0006] Furthermore, the flow guide channel is connected with the air outlet channel via an air outlet, the inner tube is connected with the air outlet channel via a connecting port, and the connecting port is concentrically arranged with the air outlet.

[0007] Further, the first air inlet duct is connected with the inner flow channel via a first air inlet, the guide channel is connected with the air outlet duct via an air outlet, the air outlet is concentrically arranged with the first air inlet, the guide channel has a main tube space extending from the first air inlet to the air outlet, the inner tube extends from the first air inlet through the air outlet into the air outlet and is coaxially arranged with the main tube space.

[0008] Further, the direction from the first air inlet toward the air outlet is defined as an air outlet direction, and the inner diameter of the inner tube gradually decreases in the air outlet direction.

[0009] Furthermore, the guide channel has an auxiliary tube space which is connected to the main tube space and is arranged at an angle with the main tube space, and the second air inlet channel is connected to the auxiliary tube space via a second air inlet port.

[0010] Furthermore, the inner tube and the outer tube are integrally formed.

[0011] Furthermore, reinforcing ribs are provided between the outer wall of the inner tube and the inner wall of the flow guide channel.

[0012] In order to solve the problem in the existing exhaust system that, since the outlet pipe is connected to multiple air inlet pipes, when the exhaust fan on one air inlet pipe is working and the exhaust fans on the other air inlet pipes are turned off, part of the gas refluxes from the other air inlet pipes to affect the exhaust effect, the utility model provides an air flow control device, and accordingly, provides an exhaust device, including an exhaust pipe, an exhaust fan, an exhaust pipe and the above-mentioned air flow control device, the exhaust pipe and the exhaust fan are both two, the two exhaust fans are respectively arranged on the two exhaust pipes, the outer pipe is connected to one of the exhaust pipes through the first air inlet duct, connected to the other exhaust pipe through the second air inlet duct, and connected to the exhaust pipe through the outlet duct.

[0013] Furthermore, the exhaust pipe is provided with a check valve between the exhaust fan and the airflow control device, the check valve includes a valve body and a check cover, the valve body has an inner channel connected to the exhaust pipe and a check portion located in the inner channel, the check portion divides the inner channel into channel one and channel two, the check portion has an air vent connecting channel one and channel two, the check cover is arranged in channel one and rotatably connected to the check portion for opening and closing the air vent.

[0014] Furthermore, the non-return cover is rotatably connected to the non-return portion above the vent, and a side of the non-return portion abutting against the non-return cover is defined as a non-return surface, and the non-return surface extends from top to bottom toward the channel.

[0015] The advantage of the present technical solution is that by configuring the airflow control device into an outer tube and an inner tube, the inner tube extends from the first air inlet duct through the guide channel into the inner tube of the air outlet duct, the inner tube has an inner flow channel connecting the first air inlet duct and the air outlet duct, and cooperates with the guide channel to form an outer flow channel connecting the second air inlet duct and the air outlet duct, and a pressure difference is formed between one end of the inner flow channel and the outer flow channel close to the air outlet when one exhaust fan is turned on and the other exhaust fan is turned off, so that the gas flows from the first airflow channel and the second airflow channel to the air outlet, avoiding gas reflux affecting the exhaust effect, and the exhaust effect is good. 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 paying any 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 perspective view of an exhaust device disclosed in an embodiment;

[0019] Figure 2 is a three-dimensional diagram of an airflow control device disclosed in an embodiment;

[0020] Figure 3 is a top view of the airflow control device disclosed in the embodiment;

[0021] Figure 4 yes Figure 3 Sectional view at AA in the middle;

[0022] Figure 5 is a side view of the airflow control device disclosed in the embodiment;

[0023] Figure 6 yes Figure 5 Sectional view at the middle BB;

[0024] Figure 7 is a front view of the airflow control device disclosed in the embodiment;

[0025] Figure 8 is a three-dimensional diagram of a check valve in an embodiment;

[0026] Fig. 9 2 is a cross-sectional view of the check valve in the embodiment. DETAILED DESCRIPTION

[0027] 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 of 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.

[0028] Example: Figure 1-9As shown, the exhaust device includes an exhaust pipe 1, an exhaust fan 2, an exhaust pipe 3 and an airflow control device 4. The exhaust pipe 1 and the exhaust fan 2 are both two, and the two exhaust fans 2 are respectively arranged on the two exhaust pipes 1. The airflow control device 4 includes an outer pipe 401 and an inner pipe 402. The outer pipe 401 has an air outlet 403, a guide channel 404, a first air inlet 405 and a second air inlet 406. The inner pipe 402 extends from the first air inlet 405 through the guide channel 404. To the air outlet 403, the inner tube 402 has an inner flow channel 407 connecting the first air inlet 405 and the air outlet 403, the outer wall of the inner tube 402 and the inner wall of the guide channel 404 are spaced apart to form an outer flow channel 408 connected to the air outlet 403 and the second air inlet 406, the outer tube 401 is connected to an exhaust pipe 1 through the first air inlet 405, is connected to another exhaust pipe 1 through the second air inlet 406, and is connected to the exhaust pipe 3 through the air outlet 403.

[0029] Among them, among the two exhaust pipes 1, one exhaust pipe 1 is defined as a first exhaust pipe, and the other exhaust pipe 1 is defined as a second exhaust pipe. Among the two exhaust fans 2, the exhaust fan 2 arranged on the first exhaust pipe is defined as the first exhaust fan, and the exhaust fan 2 arranged on the second exhaust pipe is defined as the second exhaust fan. The first exhaust pipe has a first exhaust duct connected to the first air inlet duct 405, and the second exhaust pipe has a second exhaust duct connected to the second air inlet duct 406. The first exhaust duct, the first air inlet duct 405, and the inner flow duct 407 are connected in sequence to form a first air flow channel, and the second exhaust duct, the second air inlet duct 406, and the outer flow duct 408 are connected in sequence to form a second air flow channel.

[0030] The exhaust process of the exhaust device is as follows: when the two exhaust fans 2 are started at the same time, the exhaust fans 2 drive the gas from the first airflow channel and the second airflow channel into the outlet channel 403 and then are discharged through the exhaust pipe 3; when one exhaust fan 2 is started and the other exhaust fan 2 is turned off, an air pressure difference is formed between the outer flow channel 408 and the inner flow channel 407 close to the outlet channel 403 (when the first exhaust fan is turned on and the second exhaust fan is turned off, the first exhaust fan drives the air flow from the first airflow channel into the outlet channel 403, and makes the outer flow channel 408 and the inner flow channel 407 close to the outlet channel A pressure difference is formed at one end of 403, thereby causing the gas to flow from the second air flow channel into the air outlet 403; when the second exhaust fan is turned on and the first exhaust fan is turned off, the second exhaust fan drives the air flow from the second air flow channel into the air outlet 403, and causes a pressure difference to be formed between the outer flow channel 408 and the inner flow channel 407 close to one end of the air outlet 403, thereby causing the gas to flow from the first air flow channel into the air outlet 403), and the gas flows from the first air flow channel and the second air flow channel into the air outlet 403 and is discharged through the exhaust pipe 3 to avoid gas reflux affecting the exhaust effect.

[0031] In summary, the present embodiment provides an exhaust device, by arranging an airflow control device on the exhaust pipe 1 and the exhaust pipe 3, to solve the problem that in the existing exhaust system, since the outlet pipe is connected to multiple air inlet pipes, when the exhaust fan on one air inlet pipe is working and the exhaust fans on the other air inlet pipes are turned off, part of the gas flows back from the other air inlet pipes to affect the exhaust effect, mainly by configuring the airflow control device into an outer pipe 401 and an inner pipe 402, the inner pipe 402 extends from the first air inlet 405 through the guide channel 404 into the air outlet 403 The inner tube 402 has an inner flow channel 407 connecting the first air inlet 405 and the air outlet 403, and cooperates with the guide channel 404 to form an outer flow channel 408 connecting the second air inlet 406 and the air outlet 403. When one exhaust fan 2 is turned on and the other exhaust fan 2 is turned off, a pressure difference is formed between the inner flow channel 407 and the outer flow channel 408, so that the gas flows from the first air flow channel and the second air flow channel to the air outlet 403, avoiding gas backflow to affect the exhaust effect, and the exhaust effect is good.

[0032] In the embodiment of the utility model, the guide channel 404 is connected to the air outlet 403 via the air outlet 409, and the inner tube 402 is connected to the air outlet 403 via the connecting port 410, and the connecting port 410 is concentrically arranged with the air outlet 409. Since the connecting port 410 is concentrically arranged with the air outlet 409, when one exhaust fan 2 is turned on and the other exhaust fan 2 is turned off, the pressure difference distribution of the inner flow channel 407 and the outer flow channel 408 at one end close to the air outlet 403 is balanced, and the exhaust effect is good.

[0033] In the embodiment of the utility model, the first air inlet 405 is connected to the inner flow channel 407 through the first air inlet 411, the air outlet 409 is arranged concentrically with the first air inlet 411, the guide channel 404 has a main cylinder space (not marked in the figure) extending from the first air inlet 411 to the air outlet 409, and the inner tube 402 extends from the first air inlet 411 through the air outlet 409 into the air outlet 403 and is arranged coaxially with the main cylinder space. Since the guide channel 404 has a main cylinder space extending from the first air inlet 411 to the air outlet 409, and the inner tube 402 is arranged coaxially with the main cylinder space, when one exhaust fan 2 is turned on and the other exhaust fan 2 is turned off, the pressure difference distribution of the inner flow channel 407 and the outer flow channel 408 at one end close to the air outlet 403 is balanced, and the exhaust effect is good.

[0034] In the embodiment of the present invention, the direction from the first air inlet 411 to the air outlet 409 is defined as an air outlet direction, and the inner diameter of the inner tube 402 gradually decreases in the air outlet direction.

[0035] In the embodiment of the utility model, the flow guide channel 404 has an auxiliary tube space (not shown in the figure) connected to the main tube space and arranged at an angle with the main tube space, and the second air inlet channel 406 is connected to the auxiliary tube space through the second air inlet port 415.

[0036] In the embodiment of the utility model, the inner tube 402 is integrally formed with the outer tube 401. Since the inner tube 402 and the outer tube 401 are integrally formed, the inner tube 402 and the outer tube 401 have good assembly stability, and the inner flow channel 407 and the outer flow channel 408 away from the end of the outlet 403 have good airtightness.

[0037] In the embodiment of the utility model, the outer wall of the inner tube 402 is provided with a reinforcing rib 414 extending to the inner wall of the flow guide 404. The above arrangement is provided with a reinforcing rib 414 extending to the inner wall of the flow guide 404 outside the inner tube 402, so that the inner tube 402 and the outer tube 401 are connected stably and have good anti-bending and anti-deformation capabilities.

[0038] In the embodiment of the utility model, the exhaust pipe 1 is provided with a check valve 5 between the exhaust fan 2 and the airflow control device 4. The check valve 5 includes a valve body 501 and a check cover 502. The valve body 501 has an inner channel (not shown) connected to the exhaust pipe 1 and a check portion 504 located in the inner channel. The check portion 504 divides the inner channel into a channel 1 505 and a channel 2 506. The check portion 504 has a vent 507 connecting the channel 1 505 and the channel 2 506. The check cover 502 is arranged in the channel 1 505 and is rotatably connected to the check portion 504 for opening and closing the vent 507. Among them, the channel 1 505 is close to the outer tube 401, and the channel 2 506 is farther away from the outer tube 401 than the channel 1 505. When the exhaust fan 2 is started, the non-return cover 502 is pushed by the air flow to flip upward to open the vent 507; when the exhaust fan 2 is turned off, the non-return cover 502 is turned downward under the action of gravity to close the vent 507. The above arrangement prevents outdoor air from flowing back into the room when both exhaust fans 2 are turned off by arranging the non-return valve 5 on the exhaust pipe 1.

[0039] In the embodiment of the utility model, the non-return cover 502 is rotatably connected with the non-return portion 504 above the vent 507, and the side where the non-return portion 504 abuts against the non-return cover 502 is defined as a non-return surface 508, and the non-return surface 508 extends from top to bottom toward the channel 1 505. The above arrangement sets the non-return surface 508 to extend from top to bottom toward the channel 1 505, so that the non-return cover 502 has a downward turning movement tendency when closing the vent 507, and the closing effect is good.

[0040] 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.

[0041] 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. An airflow control device, characterized in that: The invention comprises an outer tube and an inner tube, wherein the outer tube has an air outlet, a flow guide, a first air inlet and a second air inlet, the inner tube extends from the first air inlet through the flow guide to the air outlet, the inner tube has an inner flow channel connecting the first air inlet and the air outlet, and the outer wall of the inner tube is spaced apart from the inner wall of the flow guide to form an outer flow channel connecting the air outlet and the second air inlet.

2. The airflow control device according to claim 1, characterized in that: The flow guide channel is communicated with the air outlet channel via an air outlet, the inner tube is communicated with the air outlet channel via a communication port, and the communication port is concentrically arranged with the air outlet.

3. The airflow control device according to claim 1, characterized in that: The first air inlet is connected with the inner flow channel via the first air inlet, the guide channel is connected with the air outlet via the air outlet, the air outlet is concentrically arranged with the first air inlet, the guide channel has a main tube space extending from the first air inlet to the air outlet, the inner tube extends from the first air inlet through the air outlet into the air outlet and is coaxially arranged with the main tube space.

4. The airflow control device according to claim 3, characterized in that: The direction from the first air inlet toward the air outlet is defined as an air outlet direction, and the inner diameter of the inner tube gradually decreases in the air outlet direction.

5. The airflow control device according to claim 3, characterized in that: The flow guide passage has an auxiliary tube space which is in communication with the main tube space and is arranged at an angle with the main tube space, and the second air inlet passage is in communication with the auxiliary tube space via a second air inlet port.

6. The airflow control device according to claim 1, characterized in that: The inner tube and the outer tube are integrally formed.

7. The airflow control device according to claim 1, characterized in that: Reinforcing ribs are arranged between the outer wall of the inner tube and the inner wall of the flow guide channel.

8. Exhaust device, characterized in that, It includes an exhaust pipe, an exhaust fan, an exhaust pipe and an airflow control device as described in any one of claims 1 to 7, wherein there are two exhaust pipes and two exhaust fans, and the two exhaust fans are respectively arranged on the two exhaust pipes, and the outer pipe is connected with one exhaust pipe through the first air inlet duct, connected with the other exhaust pipe through the second air inlet duct, and connected with the exhaust pipe through the air outlet duct.

9. The exhaust device according to claim 8, characterized in that: The exhaust pipe is provided with a check valve between the exhaust fan and the airflow control device, the check valve includes a valve body and a check cover, the valve body has an inner channel connected to the exhaust pipe and a check portion located in the inner channel, the check portion divides the inner channel into channel one and channel two, the check portion has an air vent connecting channel one and channel two, the check cover is arranged in channel one and rotatably connected to the check portion for opening and closing the air vent.

10. The exhaust device according to claim 9, characterized in that: The non-return cover is rotatably connected to the non-return portion above the vent, and a side of the non-return portion abutting against the non-return cover is defined as a non-return surface, and the non-return surface extends from top to bottom toward the channel one.

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