External exhaust device of range hood

Abstract

The utility model discloses an external exhaust device of a range hood. The external exhaust device comprises a shell and a fan, the shell is provided with an air duct cavity and a transfer cavity, the air duct cavity is provided with an air inlet and an air outlet, the air duct cavity is communicated with the transfer cavity through the air outlet, the transfer cavity is located on one side of the air duct cavity in the horizontal direction, the air outlet is higher than the bottom of the transfer cavity, and the transfer cavity is provided with an exhaust outlet communicated with the outside; the fan is arranged on the shell and used for forming air flow in the direction from the air inlet to the air outlet in the air duct cavity. When external rainwater and other foreign matters accidentally enter the shell from the exhaust outlet, the air outlet is higher than the bottom of the transfer cavity, so that the rainwater and other foreign matters stay in the transfer cavity and are difficult to enter the air outlet, the risk that the rainwater and other foreign matters enter the air duct cavity through the air outlet can be reduced, and the service life of the external exhaust device is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of range hoods, in particular to an external exhaust device for range hoods. Background Art

[0002] A range hood is usually installed in the kitchen cooking area. Currently, the exhaust device of some range hoods is installed outdoors and connected to the indoor smoke hood through a smoke exhaust duct. This type of external exhaust device for a range hood includes a housing and a fan. The housing has an air duct cavity, an air inlet, and an air outlet. The fan is located in the air duct cavity, and the air duct cavity is connected to the smoke exhaust duct through the air inlet. When the fan is started, an airflow is formed in the air duct cavity, and then the indoor smoke is discharged through the air outlet through the smoke exhaust duct and smoke hood. However, with this type of external exhaust device, foreign matter such as rainwater may enter the air duct cavity through the air outlet, affecting the service life of the external exhaust device. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an external exhaust device for a range hood, which can reduce the risk of foreign matter such as rainwater entering the air duct cavity through the air outlet.

[0004] According to an embodiment of the present invention, the external exhaust device for a range hood comprises a housing and a fan. The housing is provided with an air duct cavity and a transfer cavity. The air duct cavity is provided with an air inlet and an air outlet. The air duct cavity is connected to the transfer cavity through the air outlet. The transfer cavity is located on one side of the air duct cavity in a horizontal direction. The air outlet is higher than the bottom of the transfer cavity. The transfer cavity is provided with an exhaust vent that communicates with the outside world. The fan is disposed in the housing and is used to form an air flow in the air duct cavity from the air inlet to the air outlet.

[0005] The external exhaust device of the range hood according to the embodiment of the present invention has at least the following beneficial effects: when the fan is started, an airflow is formed in the air duct cavity, and the smoke enters the air duct cavity from the air inlet, and then passes through the air outlet and the transfer cavity in sequence, and is finally discharged from the shell body through the air outlet, completing the exhaust; when foreign matter such as rainwater from the outside accidentally enters the inside of the shell body from the air outlet, since the air outlet is higher than the bottom of the transfer cavity, the rainwater and other foreign matter stay in the transfer cavity and are difficult to enter the air outlet, thereby reducing the risk of foreign matter such as rainwater entering the air duct cavity through the air outlet, and improving the service life of the external exhaust device.

[0006] According to some embodiments of the present invention, the air outlet and the air exhaust port are respectively disposed on opposite sides of the transfer chamber along the horizontal direction.

[0007] According to some embodiments of the present invention, a mesh body is further included, and the mesh body is arranged on the shell and covers the exhaust port.

[0008] According to some embodiments of the present invention, the mesh body and the shell are an integrally formed structure.

[0009] According to some embodiments of the present invention, the shell is further provided with an electric control cavity, which is located on the side of the air duct cavity away from the transfer cavity, and the shell is provided with an electric control module, which is located in the electric control cavity.

[0010] According to some embodiments of the present invention, the shell includes a main box body, a first partition and a second partition, the first partition and the second partition are arranged in parallel and spaced apart, the first partition and the second partition are both arranged in the up and down directions, the main box body is provided with a accommodating cavity, the first partition and the second partition are located in the main box body and divide the accommodating cavity into the electric control cavity, the air duct cavity and the transfer cavity, the air outlet is arranged on the first partition, and the air inlet and the exhaust outlet are arranged on the main box body.

[0011] According to some embodiments of the present invention, the electronic control module is installed on the second partition.

[0012] According to some embodiments of the present invention, a backflow prevention mechanism is further included, which is arranged on the shell and located at the air outlet. The backflow prevention mechanism includes a windproof plate and a stop block. The stop block is arranged on the shell. One end of the windproof plate is rotatably arranged on the shell and has an open state and a closed state. In the open state, the other end of the windproof plate rotates away from the air duct cavity to open the air outlet; in the closed state, the windproof plate rotates to abut against the stop block and covers the air outlet.

[0013] According to some embodiments of the present invention, the anti-return mechanism is provided with two windproof plates, the rotation axes of the two windproof plates are coaxially arranged, and the rotation axis of the windproof plates is located in the middle of the air outlet.

[0014] According to some embodiments of the present invention, the anti-return mechanism further includes an elastic member, which abuts against the windproof plate and is used to make the windproof plate have a tendency to rotate toward the closed state.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1This is a three-dimensional schematic diagram of an external exhaust device for a range hood according to an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram of an external exhaust device for a range hood according to an embodiment of the present invention;

[0019] Figure 3 For the embodiment of the utility model Figure 2 A local enlarged schematic diagram of point A.

[0020] Reference numerals:

[0021] Housing 100, air duct cavity 110, transfer cavity 120, air inlet 130, air outlet 140, exhaust vent 150, electronic control cavity 160, main box 170, first partition 180, rotating shaft 181, second partition 190;

[0022] Fan 200;

[0023] Net body 300;

[0024] Electronic control module 400;

[0025] Anti-return mechanism 500, windproof plate 510, stop block 520, elastic member 530. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0028] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] There are also some integrated range hoods that are installed indoors and directly discharge smoke to the outside through a smoke exhaust duct. However, in some cases, the smoke extraction capacity of the range hood is insufficient and cannot meet the needs of users.

[0031] Reference Figures 1 to 3 , which is an external exhaust device for a range hood according to an embodiment of the present invention, comprises a housing 100 and a fan 200. The housing 100 is provided with an air duct chamber 110 and a transfer chamber 120. The air duct chamber 110 is provided with an air inlet 130 and an air outlet 140. The air duct chamber 110 is connected to the transfer chamber 120 through the air outlet 140. The transfer chamber 120 is located on one side of the air duct chamber 110 in the horizontal direction. The air outlet 140 is higher than the bottom of the transfer chamber 120. The transfer chamber 120 is provided with an exhaust port 150 that communicates with the outside world. The fan 200 is disposed in the housing 100 and is used to form an air flow from the air inlet 130 to the air outlet 140 in the air duct chamber 110.

[0032] When the fan 200 is started, an airflow is formed in the air duct cavity 110, and the smoke enters the air duct cavity 110 from the air inlet 130, and then passes through the air outlet 140 and the transfer cavity 120 in sequence, and is finally discharged from the shell 100 through the exhaust port 150, completing the exhaust; when foreign matter such as rainwater from the outside accidentally enters the interior of the shell 100 from the exhaust port 150, since the air outlet 140 is higher than the bottom of the transfer cavity 120, the rainwater and other foreign matter stay in the transfer cavity 120 and are difficult to enter the air outlet 140, thereby reducing the risk of rainwater and other foreign matter entering the air duct cavity 110 through the air outlet 140 and improving the service life of the external exhaust device.

[0033] Specifically, the external exhaust device of the present invention can also be connected to a conventional integrated range hood through a smoke exhaust duct to increase the wind force of the integrated range hood and enhance the smoke extraction capacity of the range hood.

[0034] In this embodiment, the air outlet 140 and the exhaust port 150 are located on opposite sides of the transfer chamber 120 along the horizontal direction. This arrangement of the air outlet 140 and exhaust port 150 allows airflow to pass directly horizontally through the transfer chamber 120 before being discharged through the exhaust port 150. This linear airflow reduces wind loss and improves the exhaust device's ability to extract smoke.

[0035] Specifically, the air outlet 140 and the air exhaust port 150 are both higher than the bottom of the transfer chamber 120 , and the air outlet 140 is opposite to the upper middle portion of the transfer chamber 120 , while the air exhaust port 150 is opposite to the upper middle portion of the transfer chamber 120 .

[0036] In this embodiment, a mesh 300 is further included. The mesh 300 is disposed within the housing 100 and covers the exhaust port 150. When the exhaust device is installed outdoors, there is a risk that insects or birds may enter the housing 100 through the exhaust port 150, potentially shortening the service life of the external exhaust device. Therefore, the mesh 300 is provided to cover the exhaust port 150. This prevents insects or birds from accidentally entering the transfer chamber 120 or the air duct chamber 110 through the exhaust port 150, thereby increasing the service life of the external exhaust device.

[0037] In the embodiment, the mesh 300 and the housing 100 are integrally formed, which saves assembly steps and improves the connection strength between the mesh 300 and the housing 100. It is conceivable that in other embodiments, the mesh 300 and the housing 100 can be produced separately and assembled together by screw locking or welding.

[0038] Specifically, the mesh body 300 is a square grid mesh body 300. The size of the grid can be specifically configured by technical personnel in this field according to actual needs. The grid size should not be too small or too large. If it is too small, it will affect the smoke exhaust capacity of the external exhaust device. If it is too large, it will be difficult to block flying insects or birds.

[0039] In this embodiment, the housing 100 is further provided with an electrical control chamber 160, which is located on the side of the air duct chamber 110 facing away from the transfer chamber 120. The housing 100 is also provided with an electrical control module 400, which is located within the electrical control chamber 160. By providing an independent electrical control chamber 160 within the housing 100, smoke and rainwater are prevented from entering the electrical control module 400 within the electrical control chamber 160, thereby reducing the impact of smoke and rainwater on the electrical control module 400. Compared to the method of placing the electrical control module 400 within the air duct chamber 110, the independent electrical control chamber 160 can extend the service life of the electrical control module 400.

[0040] In an embodiment, the shell 100 includes a main box body 170, a first partition 180 and a second partition 190, the first partition 180 and the second partition 190 are arranged in parallel and spaced apart, the first partition 180 and the second partition 190 are both arranged in the up and down directions, the main box body 170 is provided with a accommodating cavity, the first partition 180 and the second partition 190 are located in the main box body 170 and divide the accommodating cavity into an electric control cavity 160, an air duct cavity 110 and a transfer cavity 120, the air outlet 140 is arranged on the first partition 180, and the air inlet 130 and the air outlet 150 are arranged on the main box body 170. The shell 100 divides the main box body 170 into an electric control chamber 160, an air duct chamber 110 and a transfer chamber 120 through a first partition 180 and a second partition 190 which are parallel to each other, so that the three chambers are independent of each other, and the first partition 180 is provided with an air outlet 140 to directly connect the air duct chamber 110 and the transfer chamber 120. The structure is simple and the processing and manufacturing is relatively convenient.

[0041] In this embodiment, the electronic control module 400 is mounted on the second partition 190, achieving a better installation effect. The electronic control module 400 is fixed to the second partition 190 via screws, eliminating the need to drill holes in the main housing 170 and preventing rainwater from entering the main housing 170. It is conceivable that the electronic control module 400 can also be installed in other locations, such as on the main housing 170.

[0042] Specifically, the housing 100 is further provided with air guide vanes, which are located in the air duct cavity 110 of the main box body 170 . The air guide vanes form a volute to improve the exhaust capacity of the fan 200 .

[0043] In an embodiment, a backflow prevention mechanism 500 is further included. The backflow prevention mechanism 500 is arranged on the shell 100 and located at the air outlet 140. The backflow prevention mechanism 500 includes a wind shield 510 and a stop block 520. The stop block 520 is arranged on the shell 100. One end of the wind shield 510 is rotatably arranged on the shell 100 and has an open state and a closed state. In the open state, the other end of the wind shield 510 rotates away from the air duct cavity 110 to open the air outlet 140; in the closed state, the wind shield 510 rotates to abut against the stop block 520 and covers the air outlet 140.

[0044] When the fan 200 is started, it generates airflow from the air inlet 130 to the air outlet 140. The airflow pushes open the wind shield 510, causing it to rotate to the open position. At this time, the exhaust device can normally discharge smoke. When the external wind is strong and blows the air back from the exhaust port 150 into the air outlet 140, the wind shield 510 can rotate to cover the air outlet 140. The stop block 520 abuts the wind shield 510 to maintain the position of the wind shield 510, so that the external airflow does not flow back into the air duct cavity 110. The above-mentioned anti-return mechanism 500 does not affect the normal use of the exhaust device and can reduce the risk of the exhaust device being backflowed by external air.

[0045] In an embodiment, the anti-return mechanism 500 is provided with two wind shields 510, and the rotation axes of the two wind shields 510 are coaxially arranged. The rotation axes of the wind shields 510 are located in the middle of the air outlet 140. The air outlet 140 is opened or closed by cooperating with the two wind shields 510, and the anti-return mechanism 500 has a better use effect.

[0046] Specifically, the first partition plate 180 is provided with a rotating shaft 181, and both windshield plates 510 are provided with an axial hole. The rotating shaft 181 is inserted into the axial holes of the two windshield plates 510, so that the rotation axes of the two windshield plates 510 are coaxial. It is conceivable that in other embodiments, the anti-return mechanism 500 may also include a single windshield plate 510; or the rotation axes of the two windshield plates 510 may not be coaxial.

[0047] Specifically, the wind shield 510 may be provided with a rotating shaft portion, and the housing 100 may be provided with an axial hole to achieve a rotational connection between the two.

[0048] In this embodiment, the anti-return mechanism 500 further includes an elastic member 530, which abuts against the wind shield 510 and is used to bias the wind shield 510 toward the closed position. When the fan 200 is turned off, the elastic member 530 automatically forces the wind shield 510 to close the air outlet 140, further enhancing the protection of the air duct cavity 110 and preventing the backflow of external airflow and the ingress of debris into the air duct cavity 110.

[0049] Specifically, elastic member 530 is a torsion spring mounted on rotating shaft 181. Its ends abut against the two wind shields 510, driving them to automatically rotate to the closed position when fan 200 is turned off. When fan 200 is turned on, the wind overcomes the spring's force and rotates the wind shields 510 to the open position, allowing airflow to exit the exhaust device in one direction.

[0050] It is conceivable that when the anti-return mechanism 500 is provided with a wind shield 510 , the torsion spring may have one end fixed to the housing 100 and the other end abutting against the wind shield 510 .

[0051] It is conceivable that the elastic member 530 may also be other structures, for example, the elastic member 530 is an elastic rope, one end of the elastic rope is connected to the shell 100, and the other end of the elastic rope is connected to the end of the wind shield 510 away from the rotating shaft 181. The elastic rope is in a naturally contracted state, causing the wind shield 510 to rotate to a closed state; when the fan 200 is started, the elastic rope stretches, allowing the wind shield 510 to rotate to an open state, thereby allowing the airflow to be discharged from the exhaust device in one direction.

[0052] Specifically, the fan 200 of the present invention is a centrifugal fan 200. It is understandable that the fan 200 may also be other types of fans 200, such as an axial flow fan 200, etc. Those skilled in the art may configure the fan 200 according to actual needs.

[0053] Specifically, the electric control module 400 may be a structure having a control circuit, such as a circuit board or a single chip microcomputer.

[0054] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A range hood external exhaust device, characterized in that: include: A housing (100) is provided with an air duct cavity (110) and a transfer cavity (120); the air duct cavity (110) is provided with an air inlet (130) and an air outlet (140); the air duct cavity (110) is communicated with the transfer cavity (120) through the air outlet (140); the transfer cavity (120) is located on one side of the air duct cavity (110) in a horizontal direction; the air outlet (140) is higher than the bottom of the transfer cavity (120); and the transfer cavity (120) is provided with an air outlet (150) communicated with the outside world; A fan (200) is provided in the housing (100), and the fan (200) is used to form an air flow in the air duct cavity (110) in a direction from the air inlet (130) to the air outlet (140).

2. The external exhaust device for range hood according to claim 1, characterized in that: The air outlet (140) and the air exhaust port (150) are respectively disposed on two opposite sides of the transfer chamber (120) in a horizontal direction.

3. The external exhaust device for range hood according to claim 1, characterized in that: It also includes a mesh body (300), which is arranged on the housing (100) and covers the air outlet (150).

4. The external exhaust device for range hood according to claim 3, characterized in that: The net body (300) and the shell (100) are an integrally formed structure.

5. The external exhaust device for range hood according to claim 1, characterized in that: The housing (100) is further provided with an electric control cavity (160), the electric control cavity (160) being located on a side of the air duct cavity (110) facing away from the transfer cavity (120), and the housing (100) is provided with an electric control module (400), the electric control module (400) being located in the electric control cavity (160).

6. The external exhaust device for a range hood according to claim 5, characterized in that: The shell (100) includes a main box body (170), a first partition (180) and a second partition (190), wherein the first partition (180) and the second partition (190) are arranged in parallel and spaced apart, and the first partition (180) and the second partition (190) are both arranged in the up-down direction. The main box body (170) is provided with a accommodating cavity, and the first partition (180) and the second partition (190) are located in the main box body (170) and divide the accommodating cavity into the electric control cavity (160), the air duct cavity (110) and the transfer cavity (120). The air outlet (140) is arranged on the first partition (180), and the air inlet (130) and the air outlet (150) are arranged on the main box body (170).

7. The external exhaust device for a range hood according to claim 6, characterized in that: The electric control module (400) is installed on the second partition (190).

8. The external exhaust device for a range hood according to claim 1, characterized in that: The invention also includes a backflow prevention mechanism (500), which is arranged on the shell (100) and located at the air outlet (140). The backflow prevention mechanism (500) includes a windproof plate (510) and a stop block (520). The stop block (520) is arranged on the shell (100). One end of the windproof plate (510) is rotatably arranged on the shell (100) and has an open state and a closed state. In the open state, the other end of the windproof plate (510) rotates away from the air duct cavity (110) to open the air outlet (140); in the closed state, the windproof plate (510) rotates to abut against the stop block (520) and covers the air outlet (140).

9. The external exhaust device for range hood according to claim 8, characterized in that: The anti-return mechanism (500) is provided with two windproof plates (510), the rotation axes of the two windproof plates (510) are coaxially arranged, and the rotation axes of the windproof plates (510) are located in the middle of the air outlet (140).

10. The external exhaust device for a range hood according to claim 8, characterized in that: The anti-return mechanism (500) further comprises an elastic member (530), wherein the elastic member (530) abuts against the windproof plate (510) and is used to cause the windproof plate (510) to have a tendency to rotate toward the closed state.

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