Uniform-air range hood

Abstract

The utility model discloses an air uniformizing smoke sucker which comprises a machine shell, the machine shell is provided with a smoke exhausting cavity, the smoke exhausting cavity is communicated with the outside through a smoke outlet and is provided with a main smoke exhausting cavity and a flow guide smoke cavity, at least part of the main smoke exhausting cavity is staggered with the smoke outlet, the flow guide smoke cavity extends to the smoke outlet from the main smoke exhausting cavity, a wind wheel is arranged in the main smoke exhausting cavity, and an air uniformizing plate is arranged in the flow guide smoke cavity. The air uniformizing plate extends around the outer side of the wind wheel in the direction far away from the smoke exhaust port to divide the flow guide smoke cavity into two air uniformizing cavities communicated with the main smoke suction cavity, and in the two air uniformizing cavities, the flow area of the air uniformizing cavity close to the wind wheel is smaller than that of the other air uniformizing cavity. The air uniformizing plate is arranged in the flow guide smoke cavity and extends around the outer side of the wind wheel in the direction far away from the smoke exhaust port to divide the flow guide smoke cavity into two air uniformizing cavities communicated with the main smoke exhaust cavity, so that the internal composition of the smoke exhaust cavity is changed, vortexes cannot be formed in the flow guide smoke cavity when the wind wheel rotates, and gas is prevented from being retained in the smoke exhaust cavity; and noise is eliminated while the air outlet volume of the smoke outlet is increased.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a uniform air extraction range hood. Background Technology

[0002] A downdraft range hood is a device that draws and exhausts smoke downwards to maintain clean air in the kitchen during cooking. Existing downdraft range hoods include a casing and a fan. The casing has a smoke extraction chamber, a smoke inlet, and a smoke exhaust outlet. The smoke inlet is located at the top of the casing, and the smoke exhaust outlet is located around the perimeter. The fan is positioned within the smoke extraction chamber to drive airflow from the smoke inlet into the chamber and from the smoke exhaust outlet, thus achieving downward smoke extraction. However, because the smoke extraction chamber is volute-shaped and partially offset from the smoke exhaust outlet, and the fan is positioned at this offset location, the exhaust volume is uneven, with a larger volume near the fan and a smaller volume further away. Utility Model Content

[0003] The purpose of this utility model is to provide a uniform airflow range hood to solve the problem of uneven airflow in existing downdraft range hoods, where the exhaust chamber and exhaust outlet are misaligned, and the fan is positioned at the misaligned location of the exhaust chamber and exhaust outlet. This results in a large airflow at the exhaust outlet near the fan and a small airflow at the exhaust outlet far from the fan.

[0004] This utility model is achieved through the following technical solution:

[0005] A uniform air extraction fan includes a housing with an extraction and exhaust chamber. The extraction and exhaust chamber is connected to the outside via an exhaust port and has a main extraction chamber and a guide chamber that are interconnected. The main extraction chamber is at least partially offset from the exhaust port. The guide chamber extends from the main extraction chamber to the exhaust port. A fan is provided in the main extraction chamber, and a uniform air distribution plate is provided in the guide chamber. The uniform air distribution plate extends around the outside of the fan in a direction away from the exhaust port, dividing the guide chamber into two uniform air distribution chambers that are connected to the main extraction chamber. In the two uniform air distribution chambers, the flow area of ​​the uniform air distribution chamber closer to the fan is smaller than the flow area of ​​the other uniform air distribution chamber.

[0006] Furthermore, the flow area of ​​the guiding smoke chamber gradually increases in the direction away from the smoke exhaust port, and the flow area of ​​the two equalizing air chambers gradually increases in the direction away from the smoke exhaust port.

[0007] Furthermore, the air distribution chamber near the impeller is defined as the left air distribution chamber. The smoke extraction chamber is provided with a guide plate that divides it into the main smoke extraction chamber and the guide smoke chamber. The guide plate extends from the side of the smoke outlet near the impeller along the circumference of the impeller. The guide plate and the air distribution plate are arranged opposite to each other to form the cavity wall of the left air distribution chamber.

[0008] Furthermore, the portion of the guide vane extending circumferentially along the wind turbine is directly opposite the wind turbine in the axial direction of the wind turbine.

[0009] Furthermore, the end of the air distribution plate near the smoke exhaust port is defined as the front end, the guide plate is semi-circular, and the rear end of the guide plate extends to the rear of the air distribution plate.

[0010] Furthermore, the air distribution plate and the air guide plate are integrally formed on the bottom of the exhaust chamber.

[0011] Furthermore, the end of the air distribution plate near the smoke exhaust port is defined as the front end, and the rear end of the air distribution plate extends to the side of the impeller away from the smoke exhaust port.

[0012] Furthermore, the housing is integrally formed with a volute component that constitutes the circumferential cavity wall of the exhaust chamber.

[0013] Furthermore, the volute is disposed on the bottom surface of the housing, and a reinforcing rib ring is integrally formed on the bottom surface of the housing below the impeller. The reinforcing rib ring is concentrically arranged with the impeller, and the exhaust port is opened on the periphery of the housing.

[0014] Furthermore, the housing includes a bottom shell and a top cover. The volute is integrally formed on the bottom surface of the bottom shell and surrounds the top cover to form the exhaust chamber. The top cover is detachably fixed to the bottom shell, and the top cover is provided with an inlet facing the impeller.

[0015] The advantage of this technical solution is that by configuring an air distribution plate in the guide smoke chamber, the air distribution plate extends around the outside of the impeller in the direction away from the exhaust port, dividing the guide smoke chamber into two air distribution chambers that are connected to the main smoke extraction chamber. This changes the internal structure of the smoke extraction and exhaust chamber, preventing the impeller from forming a vortex in the guide smoke chamber when it rotates, avoiding gas stagnation in the smoke extraction and exhaust chamber, increasing the air volume at the exhaust port, and eliminating noise. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a perspective view of the uniform airflow smoke extractor disclosed in the embodiment;

[0019] Figure 2 This is an exploded view of the uniform airflow smoke extractor disclosed in the embodiment;

[0020] Figure 3 This is a perspective view of the bottom shell in the embodiment;

[0021] Figure 4 This is a top view of the bottom shell in the embodiment. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Figure 1-4As shown, the uniform air extraction fan includes a housing 1, which has a smoke extraction chamber 101. The smoke extraction chamber 101 is connected to the outside via a smoke outlet 102 and has a main smoke extraction chamber 103 and a guide smoke chamber 104 that are interconnected. The main smoke extraction chamber 103 is at least partially offset from the smoke outlet 102. The guide smoke chamber 104 extends from the main smoke extraction chamber 103 to the smoke outlet 102. A fan 2 is provided inside the main smoke extraction chamber 103, and a uniform air distribution plate 105 is provided inside the guide smoke chamber 104. The uniform air distribution plate 105 extends around the outside of the fan 2 in a direction away from the smoke outlet 102, dividing the guide smoke chamber 104 into two uniform air distribution chambers 106 that are connected to the main smoke extraction chamber 103. In the two uniform air distribution chambers 106, the flow area of ​​the uniform air distribution chamber 106 closer to the fan 2 is smaller than that of the other uniform air distribution chamber 106. For ease of description, the end of the uniform air distribution plate 105 closer to the smoke outlet 102 is defined as the front end. This embodiment provides a uniform airflow range hood to solve the problem of uneven airflow in existing downdraft range hoods. This is because the exhaust chamber and exhaust outlet are misaligned, and the fan is positioned at the misaligned location, resulting in a large airflow near the fan at the exhaust outlet and a small airflow further away, leading to uneven airflow. The solution is to install a uniform airflow plate 105 within the guide chamber 104. The uniform airflow plate 105 extends around the outside of the impeller 2 in the direction away from the exhaust outlet 102, dividing the guide chamber 104 into two sections. The air distribution chamber 106 has a smaller flow area than the impeller 2 in the latter. This causes the airflow to be cut into two streams at the rear end of the air distribution plate 105 when it enters the guide chamber 104 from the extraction chamber 103. Because the flow area of ​​the air distribution chamber 106 near the impeller 2 is smaller than that of the other air distribution chamber 106, the airflow entering the two air distribution chambers tends to be more uniform, resulting in even airflow from the exhaust port 102 and excellent smoke extraction. Meanwhile, downdraft range hoods without the air distribution plate 105 are more prone to uneven airflow when the impeller 2 rotates. Figure 4 A vortex forms at point A, causing some air to stagnate in the smoke extraction chamber 101, affecting the airflow from the exhaust port 102 and generating noise. In this embodiment, an air distribution plate 105 is configured in the guide smoke chamber 104. The air distribution plate 105 extends around the outside of the impeller 2 in a direction away from the exhaust port 102, dividing the guide smoke chamber 104 into two air distribution chambers 106 that are connected to the main smoke extraction chamber 103. This changes the internal structure of the smoke extraction chamber 101, preventing the impeller 2 from forming a vortex at point A when it rotates, avoiding gas stagnation in the smoke extraction chamber 101, increasing the airflow from the exhaust port 102 and eliminating noise.

[0024] In this embodiment of the invention, the flow area of ​​the guide smoke chamber 104 gradually increases in the direction away from the exhaust port 102, and the flow area of ​​the two equalizing air chambers 106 also gradually increases in the direction away from the exhaust port 102. This arrangement, by configuring the guide smoke chamber 104 such that its flow area gradually increases in the direction away from the exhaust port 102, and the equalizing air chambers 106 such that their flow areas gradually increase in the direction away from the exhaust port 102, ensures smooth and uniform airflow from the equalizing air chambers 106.

[0025] In this embodiment of the invention, the rear end of the air distribution plate 105 extends to the side of the impeller 2 away from the smoke exhaust port 102. By configuring the air distribution plate 105 so that its rear end extends to the side of the impeller 2 away from the smoke exhaust port 102, the air distribution cavity 106 formed by the air distribution plate 105 has a good air distribution effect.

[0026] In this embodiment of the invention, the air distribution chamber 106 near the impeller 2 is defined as the left air distribution chamber. The exhaust chamber 101 is provided with a guide plate 107 that divides it into a main exhaust chamber 103 and a guide chamber 104. The guide plate 107 extends inward along the circumference of the impeller 2 from the side of the exhaust port 102 adjacent to the impeller 2. The guide plate 107 and the air distribution plate 105 are arranged opposite each other to form the circumferential wall of the left air distribution chamber. This arrangement, by configuring the guide plate 107 extending circumferentially along the impeller 2 from the side of the exhaust port 102 adjacent to the impeller 2 within the exhaust chamber 101, further alters the internal structure of the exhaust chamber 101, preventing the formation of a vortex at point A when the impeller 2 rotates, increasing the airflow from the exhaust port 102 while eliminating noise, and ensuring smooth airflow from the air distribution chamber 106 near the impeller 2.

[0027] In this embodiment of the invention, the portion of the guide plate 107 extending circumferentially along the impeller 2 is directly opposite the impeller 2 in the axial direction. This arrangement, by positioning the portion of the guide plate 107 extending circumferentially along the impeller 2 directly opposite the impeller 2 in the axial direction, ensures smooth airflow from the air distribution chamber 106 near the impeller 2.

[0028] In this embodiment of the invention, the guide plate 107 is semi-annular, and its rear end extends to the rear of the air distribution plate 105. By configuring the guide plate 107 into a semi-annular shape and extending its rear end to the rear of the air distribution plate 105, the air distribution cavity 106 near the impeller 2 is able to discharge air smoothly and with good air discharge effect.

[0029] In this embodiment of the invention, the air distribution plate 105 and the guide plate 107 are integrally formed on the bottom of the smoke extraction chamber 101. This configuration, by integrally forming the air distribution plate 105 and the guide plate 107 on the bottom of the smoke extraction chamber 101, ensures stable assembly and good structural strength for the air distribution plate 105 and the guide plate 107.

[0030] In this embodiment of the present invention, a volute 108 is integrally formed on the housing 1 to form the circumferential cavity wall of the smoke extraction chamber 101. The above-mentioned arrangement, by configuring the volute 108 integrally formed on the housing 1, and the volute 108 forming the circumferential cavity wall of the smoke extraction chamber 101, makes the structure of the housing 1 compact and reduces assembly and manufacturing steps.

[0031] In this embodiment of the invention, a volute 108 is disposed on the bottom surface of the housing 1. A reinforcing rib ring 109 is integrally formed on the bottom surface of the housing 1 below the impeller 2. The reinforcing rib ring 109 is concentrically arranged with the impeller 2, and the exhaust port 102 is opened on the periphery of the housing 1. The above arrangement, by configuring the reinforcing rib ring 109 integrally formed with the housing 1 below the impeller 2, ensures that the position of the housing 1 facing the impeller 2 has good structural strength, preventing deformation and breakage when the impeller 2 rotates.

[0032] In this embodiment of the invention, the housing 1 includes a bottom shell 110 and a top cover 111. A volute 108 is integrally formed on the bottom surface of the bottom shell 110 and surrounds the top cover 111 to form a smoke extraction chamber 101. The top cover 111 is detachably and fixedly connected to the bottom shell 110, and the top cover 111 has a smoke inlet (not shown in the figure) facing the impeller 2. By configuring the housing 1 as a detachably and fixedly connected bottom shell 110 and top cover 111, and with the volute 108 integrally formed on the bottom surface of the bottom shell 110 and surrounding the top cover 111 to form the smoke extraction chamber 101, the housing 1 has a compact structure and is easy and quick to assemble.

[0033] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] The above description provides one or more embodiments in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered as protected by this utility model.

Claims

1. An equalizing air extractor, comprising a casing, said casing having an air exhaust cavity, said air exhaust cavity being in communication with the outside through an air exhaust port and having a main air exhaust cavity and a flow guide air exhaust cavity which are in communication with each other, said main air exhaust cavity being at least partially staggered with said air exhaust port, said flow guide air exhaust cavity extending from said main air exhaust cavity to said air exhaust port, said main air exhaust cavity being provided with an air wheel, characterized in that, The air flow guiding cavity is provided with an air equalizing plate, which extends around the outer side of the air wheel in a direction away from the smoke outlet to divide the air flow guiding cavity into two air equalizing cavities in communication with the main smoke suction cavity.

2. The wind-unifying range hood according to claim 1, characterized in that, The cross-sectional area of the air flow guiding cavity gradually increases in a direction away from the smoke outlet, and the cross-sectional area of the two air equalizing cavities gradually increases in a direction away from the smoke outlet.

3. The wind-unifying range hood according to claim 1, characterized in that, The air equalizing cavity close to the air wheel is defined as a left air equalizing cavity, and the smoke suction and discharge cavity is provided with a flow guiding plate for dividing the smoke suction and discharge cavity into the main smoke suction cavity and the air flow guiding cavity.

4. The wind-unifying range hood according to claim 3, characterized in that, The part of the flow guiding plate extending along the circumferential direction of the air wheel is directly opposite the air wheel in the axial direction of the air wheel.

5. The wind-unifying range hood according to claim 3, wherein The end of the air equalizing plate close to the smoke outlet is defined as a front end, and the flow guiding plate is in the form of a semi-ring, with the rear end of the flow guiding plate extending to the rear of the air equalizing plate.

6. The wind-unifying range hood according to claim 3, characterized in that, The air equalizing plate and the flow guiding plate are integrally formed on the cavity bottom of the smoke suction and discharge cavity.

7. The wind-unifying range hood according to claim 1, characterized in that, The end of the air equalizing plate close to the smoke outlet is defined as a front end, and the rear end of the air equalizing plate extends to the side of the end of the air wheel away from the smoke outlet.

8. The wind-unifying range hood according to claim 1, characterized in that, The machine shell is integrally provided with a volute member constituting the circumferential cavity wall of the smoke suction and discharge cavity.

9. The wind-unifying range hood according to claim 8, characterized in that, The volute member is arranged on the bottom surface of the machine shell, and the bottom surface of the machine shell is integrally provided with a reinforcing ring below the air wheel, the reinforcing ring is arranged concentrically with the air wheel, and the smoke outlet is arranged on the circumferential side of the machine shell.

10. The wind-unifying range hood according to claim 8, characterized in that, The machine shell comprises a bottom shell and a top cover, the volute member is integrally formed on the bottom surface of the bottom shell and forms the smoke suction and discharge cavity together with the top cover, the top cover is detachably fixedly connected with the bottom shell, and the top cover is provided with a smoke inlet directly opposite the air wheel.

Images