Top-side double-suction type range hood
By designing a retractable smoke barrier, the problems of top-side double-suction range hoods blocking the view and adjusting the smoke inlet flow are solved, flexible smoke flow distribution is achieved, diverse cooking needs are met, and user experience and smoking effects are improved.
Patent Information
- Application Number
- CN202421793857.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The top of the existing top-side double-suction range hood can easily block the user's view or hit the head, and the top smoke inlet and side smoke inlet cannot adjust the flow distribution according to the oil smoke working conditions, making it difficult to meet the diverse cooking needs of users.
A retractable smoke barrier is designed, which can open the top smoke inlet and form a smoke-collecting area in the extended state, and close the top smoke inlet in the retracted state, so as to achieve the distribution and adjustment of the smoke flow rate, avoid blocking the line of sight or bumping the head, and optimize the suction distribution of the smoke inlet in different states.
While avoiding obstruction of vision or bumping of the head, it achieves flexible distribution of smoke flow, meets the oil fume extraction needs of different cooking environments, and improves user experience and smoking efficiency.
Smart Images
Figure CN222824430U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of range hoods, in particular to a top-side double-suction range hood. Background Art
[0002] With the improvement of people's quality of life, range hoods have gradually become an indispensable appliance in the kitchen. They are usually installed above the kitchen stove and can absorb the fumes generated during the cooking process, thereby purifying the kitchen environment and improving people's comfort when cooking.
[0003] Existing top-side double-suction range hoods usually have a top smoke inlet located at the top and a side smoke inlet located at the bottom on the smoke collection hood, so that the smoke can be sucked through the top smoke inlet and the side smoke inlet at the same time. However, in order to obtain a larger smoke collection area, the top of the smoke collection hood in the existing top-side double-suction range hood usually extends forward and encroaches on the user's head space, which can easily block the user's vision or bump the user's head, bringing adverse effects to the user's cooking. In addition, the top smoke inlet and the side smoke inlet in the existing top-side double-suction range hood suck smoke at the same time, and it is impossible to adjust the flow distribution according to the smoke working conditions, and it is impossible to meet the diverse cooking needs of users. Utility Model Content
[0004] In response to the problems that the top of the smoke hood of the existing top-side double-suction range hood easily blocks the user's line of sight or hits the user's head, and the two smoke inlets cannot distribute and adjust the flow according to the smoke working conditions, the present application provides a top-side double-suction range hood, which can achieve the distribution and adjustment of the smoke inlet flow while avoiding blocking the user's line of sight or hitting the user's head, so as to meet the diverse cooking needs of users.
[0005] In order to achieve at least one of the above advantages or other advantages and purposes of the utility model, the utility model provides a top-side double-suction range hood, comprising:
[0006] A fan, comprising a fan frame and a fan body arranged in the fan frame; and
[0007] A smoke collecting device is arranged below the fan frame and has a top smoke inlet arranged close to the fan frame and a side smoke inlet arranged away from the fan frame; wherein the smoke collecting device comprises a smoke collecting hood connected to the fan frame and having the side smoke inlet opened at the lower part, and a smoke barrier which is telescopically arranged at the upper part of the smoke collecting hood to switch between an extended state and a retracted state; when the smoke barrier is in the extended state, the smoke barrier extends forwardly from the smoke collecting hood to open the top smoke inlet and forms a smoke gathering area at the top smoke inlet; when the smoke barrier is in the retracted state, the smoke barrier retracts backwardly into the smoke collecting hood to close the top smoke inlet.
[0008] According to an embodiment of the present application, the top smoke inlet is opened in the smoke collecting hood or the smoke blocking member.
[0009] According to one embodiment of the present application, the smoke hood includes a first top plate connected to the fan frame and provided with a smoke outlet, a back plate extending downward from the first top plate, a front panel spaced apart from the back plate and provided with the lateral smoke inlet, a bottom plate connected to the back plate and the lower edge of the front panel, a second top plate spaced apart below the first top plate and connected to the upper edge of the front panel, and a pair of side plates connected to the first top plate, the back plate, the front panel, the bottom plate and the left and right edges of the second top plate; the first top plate, the second top plate and the two side plates together form a forward opening blocked by the smoke barrier.
[0010] According to an embodiment of the present application, the smoke outlet is located on the first top plate at a position adjacent to the back plate.
[0011] According to one embodiment of the present application, the smoke barrier includes a first box body slidably disposed between the first top plate and the second top plate, a second box body slidably mounted on the first box body, a first driving member drivingly connected to the first box body, and a second driving member drivingly connected to the second box body; the first box body extends out or retracts from the forward opening under the drive of the first driving member, and the second box body slides relative to the first box body under the drive of the second driving member to extend out or retract from the forward opening.
[0012] According to one embodiment of the present application, when the smoke barrier is in the retracted state, the front end surface of the smoke barrier is flush with the front side surface of the fan frame; when the smoke barrier is in the extended state, the distance between the front end surface of the smoke barrier and the back panel is greater than or equal to 1.5 times the thickness of the fan frame.
[0013] According to an embodiment of the present application, the length of the first box body is smaller than the length of the second box body; the length of the second box body is smaller than or equal to half the thickness of the wind turbine rack.
[0014] According to an embodiment of the present application, the first driving member is a telescopic rod disposed between the back plate of the smoke hood and the first box body; the second driving member is a telescopic rod disposed between the first box body and the second box body.
[0015] According to an embodiment of the present application, the top smoke inlet is opened on the lower wall of the second box body of the smoke barrier.
[0016] According to an embodiment of the present application, the top smoke inlet is opened at a position of the second top plate adjacent to the forward opening.
[0017] In summary, on the one hand, since the smoke barrier in the retracted state will retract the smoke collecting hood to close the top smoke inlet, the smoke barrier in the retracted state will not occupy the user's head space, block the user's sight or bump the user's head; at this time, the top-side double-suction range hood will distribute the smoke flow only to the side smoke inlet located at the bottom, so that the side smoke inlet has a greater suction force to suck out the small oil smoke, meeting the cooking environment with less oil smoke. On the other hand, since the smoke barrier in the extended state will extend out of the smoke collecting hood to form a smoke gathering area at the top smoke inlet while opening the top smoke inlet, the top-side double-suction range hood not only distributes the smoke flow to the side smoke inlet and the top smoke inlet at the same time, but also uses the smoke barrier that extends forward to play a smoke blocking role to prevent smoke from escaping, so as to meet the cooking environment with more oil smoke.
[0018] In addition, when the smoke barrier is in an extended state, the first box body and the second box body both extend forward from the front opening, and the second box body slides forward relative to the first box body, so that the first box body extends out of the second box body, so as to increase the overall length of the smoke barrier and thereby increase the smoke collecting range; when the smoke barrier is in a contracted state, the first box body and the second box body both retract backward from the front opening, and the second box body slides backward relative to the first box body, so that the first box body retracts into the second box body, so as to reduce the overall length of the smoke barrier and avoid interfering with the flow of oil smoke inhaled through the side smoke inlet. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A first example of a top-side double-suction range hood according to an embodiment of the utility model;
[0020] Figure 2 A schematic diagram showing the state of the top-side double-suction range hood according to the first example of the present application when the smoke shield is in a retracted state;
[0021] Figure 3 A schematic diagram showing the state of the top-side double-suction range hood according to the first example of the present application when the smoke shield is in an extended state;
[0022] Figure 4 This is a second example of the top-side double-suction range hood according to the above embodiment of the utility model.
[0023] Explanation of the main component symbols: 1. Smoke collecting device; 101. Top smoke inlet; 102. Side smoke inlet; 103. Forward opening; 10. Smoke collecting hood; 11. First top plate; 110. Smoke outlet; 12. Back plate; 13. Front panel; 14. Bottom plate; 140. Oil leakage port; 15. Second top plate; 16. Side plate; 20. Smoke barrier; 21. First box body; 22. Second box body; 23. First driving member; 24. Second driving member; 2. Fan frame; 3. Fan body; 4. Oil cup.
[0024] The above main component symbols are combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0031] Considering that the top of the existing top-side double-suction range hood is not only easy to block the user's sight or hit the user's head, but also the top smoke inlet and the side smoke inlet cannot be adjusted according to the smoke working conditions, it is difficult to meet the diverse cooking needs of users. Therefore, the present application provides a top-side double-suction range hood, which can achieve the distribution and adjustment of the smoke inlet flow while avoiding blocking the user's sight or hitting the user's head, so as to meet the diverse cooking needs of users.
[0032] Specifically, according to another aspect of the present application, Figures 1 to 4 As shown, one embodiment of the present application provides a top-side double-suction range hood, which may include a smoke collecting device 1 and a fan. The fan includes a fan frame 2 and a fan body 3 arranged in the fan frame 2. The smoke collecting device 1 is arranged below the fan frame 2 and has a top smoke inlet 101 arranged close to the fan frame 2 and a side smoke inlet 102 arranged away from the fan frame 2.
[0033] More specifically, if Figure 1 and Figure 4 As shown, the smoke collecting device 1 includes a smoke collecting hood 10 connected to the fan frame 2 and having the lateral smoke inlet 102 opened at the lower part, and a smoke shield 20 which is telescopically arranged at the upper part of the smoke collecting hood 10 to switch between an extended state and a retracted state; when the smoke shield 20 is in an extended state, the smoke shield 20 extends forward from the smoke collecting hood 10 to open the top smoke inlet 101 and forms a smoke collecting area at the top smoke inlet 101; when the smoke shield 20 is in a retracted state, the smoke shield 20 retracts backward from the smoke collecting hood 10 to close the top smoke inlet 101. It can be understood that the lateral smoke inlet 102 mentioned in the present application can be located at the rear side of the cooking stove to face forward so as to absorb oil smoke from the side of the cooking stove; the top smoke inlet 101 mentioned in the present application can be located above the cooking stove to face downward so as to absorb oil smoke from the top of the cooking stove.
[0034] It is worth noting that, on the one hand, Figure 2 As shown, since the smoke shield 20 in the retracted state will retract the smoke hood 10 to close the top smoke inlet 101, the smoke shield 20 in the retracted state will not occupy the user's head space, block the user's vision or bump the user's head; at this time, the top-side double-suction range hood will distribute the smoke flow only to the side smoke inlet 102 located at the bottom, so that the side smoke inlet 102 has a greater suction force to suck out the small oil smoke, meeting the cooking environment with less oil smoke. On the other hand, Figure 3 As shown, since the smoke barrier 20 in the extended state will extend out of the smoke collecting hood 10 to form a smoke collecting area at the top smoke inlet 101 while opening the top smoke inlet 101, the top-side double-suction range hood not only distributes the smoke flow rate to the side smoke inlet 102 and the top smoke inlet 101 at the same time, but also utilizes the forwardly extended smoke barrier 20 to play a smoke barrier role to prevent smoke escape, thereby meeting the cooking environment with larger oil smoke.
[0035] In addition, the top smoke inlet 101 of the present application can be opened on the upper part of the smoke collecting hood 10, and can also be opened on the smoke barrier 20, both of which can ensure that the top smoke inlet 101 is opened or closed when the smoke barrier 20 switches between the extended state and the retracted state.
[0036] For example, in the first example of the present application, Figures 1 to 3 As shown, the smoke hood 10 further has a forward opening 103 located above the top smoke inlet 101 and for the smoke barrier 20 to extend or retract; the top smoke inlet 101 is opened on the smoke hood 10 at a position adjacent to the forward opening 103, so as to open the top smoke inlet 101 when the smoke barrier 20 extends from the forward opening 103, and to block the top smoke inlet 101 when the smoke barrier 20 retracts from the forward opening 103.
[0037] Alternatively, if Figures 1 to 3 As shown, the smoke hood 10 includes a first top plate 11 connected to the fan frame 2 and having a smoke outlet 110, a back plate 12 extending downward from the first top plate 11, a front panel 13 spaced apart from the back plate 12 and having the lateral smoke inlet 102, a bottom plate 14 connected to the lower edges of the back plate 12 and the front panel 13, a second top plate 15 spaced apart below the first top plate 11 and connected to the upper edge of the front panel 13, and a pair of side plates 16 connected to the left and right edges of the first top plate 11, the back plate 12, the front panel 13, the bottom plate 14, and the second top plate 15. The first top plate 11, the second top plate 15, and the two side plates 16 together enclose a forward opening 103 blocked by the smoke blocking member 20; the top smoke inlet 101 is provided at a position on the second top plate 15 adjacent to the forward opening 103. In this way, when the smoke barrier 20 retracts backward from the forward opening 103, the smoke barrier 20 can fit onto the upper surface of the second top plate 15 to block the top smoke inlet 101 opened on the second top plate 15; and when the smoke barrier 20 extends forward from the forward opening 103, the smoke barrier 20 moves away from the top smoke inlet 101 opened on the second top plate 15 to open the top smoke inlet 101.
[0038] Alternatively, if Figure 2 and Figure 3 As shown, the smoke outlet 110 is located at a position on the first top plate 11 adjacent to the back plate 12, so as to form a first smoke passage connecting the top smoke inlet 101 with the smoke outlet 110 between the first top plate 11 and the second top plate 15, and a second smoke passage connecting the side smoke inlet 102 with the smoke outlet 110 between the back plate 12 and the front plate 13. In this way, the oil smoke inhaled through the top smoke inlet 101 will flow backward to the smoke outlet 110 through the first smoke passage, and then flow into the fan frame 2; at the same time, the oil smoke inhaled through the side smoke inlet 102 will flow upward to the smoke outlet 110 through the second smoke passage, so as to avoid a large angle change in flow direction and increase in oil smoke resistance.
[0039] It is worth noting that Figure 2 and Figure 3As shown, in order to prevent the smoke barrier 20 in a retracted state from blocking or blocking the second smoke channel, the smoke barrier 20 may include a first box body 21 slidably arranged between the first top plate 11 and the second top plate 15 to be located within the first smoke channel, a second box body 22 slidably mounted on the first box body 21, a first driving member 23 drivingly connected to the first box body 21, and a second driving member 24 drivingly connected to the second box body 22; the first box body 21 is driven by the first driving member 23 to extend or retract from the forward opening 103, and the second box body 22 is driven by the second driving member 24 to slide relative to the first box body 21 to extend or retract from the forward opening 103.
[0040] In this way, Figure 3 As shown in FIG. 1 , when the smoke barrier 20 is in the extended state, the first box body 21 and the second box body 22 both extend forward from the forward opening 103, and the second box body 22 slides forward relative to the first box body 21, so that the first box body 21 extends out of the second box body 22, thereby increasing the overall length of the smoke barrier 20 and thus increasing the smoke trapping range; Figure 2 As shown, when the smoke shield 20 is in the retracted state, the first box body 21 and the second box body 22 are both retracted backward from the forward opening 103, and the second box body 22 slides backward relative to the first box body 21, so that the first box body 21 retracts into the second box body 22, so as to reduce the overall length of the smoke shield 20 and avoid interfering with the flow of oil smoke sucked through the side smoke inlet 102. It is understandable that if the overall length of the smoke shield 20 in the retracted state is long to block the second oil smoke channel, the cross-sectional area of the second oil smoke channel is greatly reduced, which will cause the noise of the range hood to increase.
[0041] Alternatively, if Figure 2 As shown, when the smoke barrier 20 is in a retracted state, the front end surface of the smoke barrier 20 is substantially flush with the front side surface of the fan frame 2; when the smoke barrier 20 is in an extended state, the distance between the front end surface of the smoke barrier 20 and the back panel 12 is greater than or equal to 1.5 times the thickness of the fan frame 2, so as to prevent the smoke barrier 20 from occupying the user's head space when retracted, and increase the smoke collection range when extended to reduce the risk of oil smoke escape.
[0042] Optionally, the length of the first box body 21 is smaller than the length of the second box body 22, and the length of the second box body 22 is less than or equal to half the thickness of the fan frame 2. This can not only ensure that the first box body 21 can be completely accommodated in the second box body 22 to shorten the overall length of the smoke barrier 20 in the retracted state and avoid interference with the second oil fume channel; it can also ensure that the overall length of the first box body 21 when extending from the second box body 22 is greater than half the thickness of the fan frame 2, so as to meet the smoke collection requirements.
[0043] Alternatively, if Figure 2 and Figure 3 As shown, the first driving member 23 is implemented as a telescopic rod disposed between the back plate 12 of the smoke hood 10 and the first box 21, so as to drive the first box 21 to extend or retract from the front opening 103; the second driving member 24 is implemented as a telescopic rod disposed between the first box 21 and the second box 22, so as to drive the second box 22 to slide relative to the first box 21 to increase or decrease the overall length of the smoke shield 20. It can be understood that the telescopic rod mentioned in the present application can be implemented as, but not limited to, an electric push rod, a linear motor, a telescopic slide rail, a cylinder or a hydraulic rod, etc., as long as it can drive the first box 21 and the second box 22 to extend or retract from the front opening 103 respectively, and the present application will not repeat it.
[0044] It is worth noting that in other examples of the present application, the first box body 21 may also be slidably mounted outside the second box body 22; or the smoke shield 20 may further include other boxes. In addition, the smoke shield 20 of the present application may not include the second driving member 24, but only include the first driving member 23; in this case, the first driving member 23 is drivingly connected to the second box body 22, and a linkage limiting structure is provided between the first box body 21 and the second box body 22, so that when the second box body 22 is driven to extend or retract from the forward opening 103 by the first driving member 23, the first box body 21 is driven to extend or retract from the forward opening 103 by the second box body 22.
[0045] Optionally, the top-side double-suction range hood further includes an interactive interface (not shown in the figure), which is arranged on the front end surface of the smoke shield 20 so that the user can operate the interactive interface to control the top-side double-suction range hood.
[0046] Furthermore, in the second example of the present application, Figure 4 As shown, the top smoke inlet 101 can be provided in the smoke barrier 20, so as to open the top smoke inlet 101 when the smoke barrier 20 extends from the front opening 103, and block the top smoke inlet 101 when the smoke barrier 20 retracts from the front opening 103. In this way, when the smoke barrier 20 extends from the front opening 103, the negative pressure area formed by the top smoke inlet 101 provided in the smoke barrier 20 will be away from the smoke collecting hood 10, and closer to the top of the cooking stove, so that the oil smoke is not easy to escape.
[0047] Alternatively, if Figure 4As shown, the top smoke inlet 101 is opened on the lower wall of the second box body 22 of the smoke barrier 20, so as to ensure that the top smoke inlet 101 is as far away from the smoke hood 10 as possible when the smoke barrier 20 is in the extended state to prevent the escape of oil smoke. It can be understood that in other examples of the present application, the top smoke inlet 101 can also be opened on the lower wall of the first box body 21 of the smoke barrier 20, which can still meet the demand for oil smoke extraction, and this application will not repeat it.
[0048] According to the above embodiments of the present application, Figures 1 to 4 As shown, the top-side double-suction range hood may further include an oil cup 4 arranged below the smoke hood 10, the oil cup 4 is connected to the bottom plate 14 of the smoke hood 10, and the bottom plate 14 is provided with an oil leakage port 140 connected to the oil cup 4, so that the oil stains condensed in the smoke hood 10 and / or the fan frame 2 can flow into the oil cup 4 through the oil leakage port 140.
[0049] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0050] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. Top-side double-suction range hood, characterized in that: include: A fan, comprising a fan frame and a fan body arranged in the fan frame; and A smoke collecting device is arranged below the fan frame and has a top smoke inlet arranged close to the fan frame and a side smoke inlet arranged away from the fan frame; wherein the smoke collecting device comprises a smoke collecting hood connected to the fan frame and having the side smoke inlet opened at the bottom, and a smoke shielding member telescopically arranged at the upper part of the smoke collecting hood to switch between an extended state and a retracted state; When the smoke blocking member is in the extended state, the smoke blocking member extends forward from the smoke collecting cover to open the top smoke inlet and form a smoke collecting area at the top smoke inlet; When the smoke blocking member is in the retracted state, the smoke blocking member retracts backwards into the smoke collecting hood to close the top smoke inlet.
2. The top-side double-suction range hood according to claim 1, characterized in that: The top smoke inlet is arranged on the smoke collecting hood or the smoke blocking member.
3. The top-side double-suction range hood according to claim 1, characterized in that: The smoke hood includes a first top plate connected to the fan frame and provided with a smoke outlet, a back plate extending downward from the first top plate, a front panel spaced apart from the back plate and provided with the lateral smoke inlet, a bottom plate connected to the back plate and the lower edges of the front panel, a second top plate spaced apart below the first top plate and connected to the upper edge of the front panel, and a pair of side plates connected to the first top plate, the back plate, the front panel, the bottom plate and the left and right edges of the second top plate; the first top plate, the second top plate and the two side plates together form a forward opening blocked by the smoke barrier.
4. The top-side double-suction range hood according to claim 3, characterized in that: The smoke outlet is located on the first top plate at a position adjacent to the back plate.
5. The top-side double-suction range hood according to claim 4, characterized in that: The smoke barrier includes a first box body slidably arranged between the first top plate and the second top plate, a second box body slidably mounted on the first box body, a first driving member drivingly connected to the first box body, and a second driving member drivingly connected to the second box body; the first box body extends out or retracts from the front opening under the drive of the first driving member, and the second box body slides relative to the first box body under the drive of the second driving member to extend out or retract from the front opening.
6. The top-side double-suction range hood according to claim 5, characterized in that: When the smoke shield is in the retracted state, the front end surface of the smoke shield is flush with the front side surface of the fan frame; When the smoke shield is in the extended state, the distance between the front end surface of the smoke shield and the back plate is greater than or equal to 1.5 times the thickness of the fan frame.
7. The top-side double-suction range hood according to claim 6, characterized in that: The length of the first box body is smaller than the length of the second box body; the length of the second box body is smaller than or equal to half of the thickness of the wind turbine rack.
8. The top-side double-suction range hood according to claim 5, characterized in that: The first driving member is a telescopic rod arranged between the back plate of the smoke collecting hood and the first box body; the second driving member is a telescopic rod arranged between the first box body and the second box body.
9. The top-side double-suction range hood according to claim 5, characterized in that: The top smoke inlet is provided on the lower wall of the second box body of the smoke blocking member.
10. The top-side double-suction range hood according to any one of claims 3 to 8, characterized in that: The top smoke inlet is arranged on a portion of the second top plate adjacent to the forward opening.