Range hood

Abstract

The utility model relates to a range hood, which comprises a fan frame, the exhaust fume collecting hood is located below the fan frame, and the bottom of the exhaust fume collecting hood is provided with a first exhaust inlet and a second exhaust inlet which are arranged at an interval in the left-right direction; an air volume adjusting plate assembly is further arranged in the fan frame, and the air volume adjusting plate assembly and the fan frame jointly define a first air channel communicating with the first air suction opening and a second air channel communicating with the second air suction opening. The air volume adjusting plate assembly is driven by a movement mechanism to move in the left-right direction so that the air inlet volume of the first air channel and the air inlet volume of the second air channel can be changed. The range hood has the advantages that flow on the left and right sides can be reasonably distributed, and the cooking fume suction effect on the cooking side is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen appliance technical field especially, relate to a kind of range hood. BACKGROUND

[0002] Range hood is a kind of kitchen appliance that purifies kitchen environment. Range hood is generally divided into top suction type range hood and near suction type range hood. But the existing top suction type range hood generally only has a bottom middle air inlet, and its smoke suction effect is poor, and oil fume is easy to escape from the side.

[0003] Therefore, the Chinese utility model patent application with application number CN202221358667.5 (authorized announcement number: CN217928918U) discloses a T-shaped smoke machine, which includes a smoke collecting hood and an air exhaust shell. The bottom of the smoke collecting hood is provided with a main smoke gathering structure and an auxiliary smoke gathering structure. The main smoke gathering structure is used to define a concave main smoke gathering cavity, and the auxiliary smoke gathering structure is used to define a concave auxiliary smoke gathering cavity. Both the main smoke gathering cavity and the auxiliary smoke gathering cavity can be used to gather oil fume. Simultaneous air intake and smoke suction through the main smoke suction port group corresponding to the main smoke gathering cavity and the auxiliary smoke suction port group corresponding to the auxiliary smoke gathering cavity can help improve the oil fume suction and exhaust efficiency of the T-shaped smoke machine. By increasing the auxiliary smoke gathering structure and the auxiliary smoke suction port group on the left and right sides of the main smoke suction port group, oil fume escaping from the side can be effectively prevented. The Chinese utility model patent application with application number CN202123352958.1 (authorized announcement number: CN217209498U) also makes a similar disclosure.

[0004] However, the range hood in the above patent application still has some deficiencies. First, generally, the cooking range corresponding to the range hood has two left and right burners. For the case of unilateral cooking by the user, the above range hood cannot adjust the flow rate on the left and right sides, but directly increases the rotational speed of the impeller to increase the total air volume of the range hood. The increase in the total air volume leads to the simultaneous increase in the air volume on the left and right sides, but also causes a significant increase in noise, reduces the user's experience, and the actual cooking occurs on one side. The simultaneous increase in the air volume on the two sides leads to energy waste on the other side. Second, after the flue gas is sucked in through the auxiliary smoke suction port, it basically flows into the flow channel of the main smoke suction port immediately. That is, the auxiliary smoke suction port and the main smoke suction port basically share the same flow channel. This structural arrangement makes the air volume and air speed of the auxiliary air inlet unstable due to the influence of the flow channel of the main smoke suction port, which reduces the oil fume suction effect.

[0005] Therefore, the existing range hood still needs to be further improved. UTILITY MODEL CONTENTS

[0006] The first technical problem to be solved by the utility model is to provide a range hood capable of reasonably distributing the flow on the left and right sides and improving the oil smoke suction effect on the cooking side according to the prior art.

[0007] The second technical problem to be solved by the utility model is to provide a range hood capable of effectively ensuring the range hood effect of the middle and left and right suction ports according to the prior art.

[0008] The technical scheme adopted by the utility model to solve the first technical problem is as follows: a range hood comprises:

[0009] A fan frame;

[0010] A smoke collecting cover is arranged below the fan frame, and the bottom of the smoke collecting cover is provided with a first suction port and a second suction port arranged at intervals along the left and right directions;

[0011] The fan frame is further provided with a wind volume adjusting plate assembly, the wind volume adjusting plate assembly and the fan frame jointly define a first air duct communicated with the first suction port and a second air duct communicated with the second suction port, and the wind volume adjusting plate assembly is driven by a movement mechanism and can move along the left and right directions to change the air inlet volume of the first air duct and the second air duct.

[0012] In order to ensure that the wind volume adjusting plate assembly has sufficient moving space, the fan frame comprises a fan frame body and two guide covers arranged on the left and right sides of the fan frame body and arranged at the back, the right side of the guide cover arranged on the left side is communicated with the fan frame body, the bottom is communicated with the top of the left side area of the smoke collecting cover, the left side of the guide cover arranged on the right side is communicated with the fan frame body, the bottom is communicated with the top of the right side area of the smoke collecting cover, and the wind volume adjusting plate assembly is movably arranged in a moving cavity formed by the internal space of the two guide covers and the internal space of the fan frame body.

[0013] In order to reduce the air inlet resistance of the first air duct and the second air duct and facilitate accurate adjustment and control of the air inlet volume, the guide cover arranged on the left side is provided with a first guide plate inclined upward from left to right, the guide cover arranged on the right side is provided with a second guide plate inclined upward from right to left, the wind volume adjusting plate assembly comprises a bottom plate, a left side plate arranged on the left side of the bottom plate and inclined upward from left to right, and a right side plate arranged on the right side of the bottom plate and inclined upward from right to left, and the gap passage between the first guide plate and the left side plate in the moving cavity forms the first air duct, and the gap passage between the second guide plate and the right side plate in the moving cavity forms the second air duct.

[0014] In order to simplify the structure of the moving mechanism, the moving mechanism comprises a screw rod, a sliding block sliding on the screw rod, and a driving motor for driving the screw rod to rotate, the screw rod extends in the left-right direction and is rotatably arranged on the fan frame or the smoke hood, and the air volume adjusting plate assembly is connected with the sliding block and can move along the length direction of the screw rod.

[0015] In order to realize the firm connection with the sliding block, the bottom plate of the air volume adjusting plate assembly further has a downwardly extending support, and the support is connected with the sliding block.

[0016] In order to ensure the overall strength of the air volume adjusting plate, the air volume adjusting plate assembly further comprises a first support plate connected between the top of the left side plate and the bottom plate, a second support plate connected between the top of the right side plate and the bottom plate, and a top plate connected between the first support plate and the second support plate.

[0017] As an improvement, the left side of the smoke hood is internally defined as a first flow guide cavity, the bottom of the first air duct is connected with the top of the rear side of the first flow guide cavity, the right side of the smoke hood is internally defined as a second flow guide cavity, and the bottom of the second air duct is connected with the top of the rear side of the second flow guide cavity.

[0018] As an improvement, the left and right sides of the bottom of the smoke hood are further formed with a first smoke collecting cavity and a second smoke collecting cavity respectively, the top of the first smoke collecting cavity is provided with a first air inlet connected with the first flow guide cavity, and the top of the second smoke collecting cavity is provided with a second air inlet connected with the second flow guide cavity.

[0019] In order to further improve the oil fume suction effect, the bottom of the smoke hood is further provided with a main air inlet in the middle region in the left-right direction, and the first air inlet and the second air inlet are respectively located on the left and right sides of the main air inlet.

[0020] The technical scheme adopted by the utility model for solving the second technical problem is that: the inside of the fan frame is provided with a centrifugal fan, the centrifugal fan has first and second air inlets opposite to each other, the fan frame is internally defined as a front air duct and a rear air duct which are independent and arranged in sequence in the front-rear direction, the front air duct is in fluid communication with the first air inlet and the main air inlet, the rear air duct is in fluid communication with the second air inlet and the first and second air inlets, and the first and second air ducts form part of the rear air duct.

[0021] The negative pressure of the middle main air inlet at the bottom of the smoke hood is large, the rising oil fume can be gathered to the middle, and part of the oil fume not captured by the main air inlet can be diffused to the two sides and then be sucked and discharged through the first air inlets and the second air inlets on the left and right sides.

[0022] In order to form the front and rear air channels, the fan frame is provided with a partition plate extending vertically and arranged along the left-right direction, which is connected with the centrifugal fan, so as to separate the space in the fan frame into the front and rear air channels.

[0023] Compared with the prior art, the fan frame of the oil fume extractor is provided with the air volume adjusting plate assembly, the air volume adjusting plate assembly and the fan frame jointly define the first and second air channels, the air volume adjusting plate assembly is driven by the movement mechanism and can move along the left-right direction to change the air inlet air volume of the first and second air channels, and then the smoke suction effect of the first and second air inlets on the left and right sides is adjusted, the same side of the oil fume extractor corresponding to the single-side cooking can greatly improve the oil fume suction effect, and the oil fume escape problem is reduced, the structure design does not need to increase the total air volume of the centrifugal fan, that is, the centrifugal fan impeller speed can remain unchanged, and the noise problem and the fan energy consumption are not increased. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective structural schematic view of the oil fume extractor of the utility model embodiment;

[0025] Figure 2 It is a bottom view of the oil fume extractor of the utility model embodiment;

[0026] Figure 3 It is a perspective structural schematic view of the left side flow guide cover and the inside of the smoke hood of the oil fume extractor of the utility model embodiment;

[0027] Figure 4 It is a perspective structural schematic view of the rear side angle of the oil fume extractor of the utility model embodiment;

[0028] Figure 5 It is a rear view of the air volume adjusting plate position middle position of the oil fume extractor of the utility model embodiment;

[0029] Figure 6 It is a rear view of the air volume adjusting plate moving to one side of the oil fume extractor of the utility model embodiment;

[0030] Figure 7 The vertical sectional view of the range hood according to the embodiment of the present application is cut along the front-rear direction. DETAILED DESCRIPTION

[0031] The present application will be further described in detail with reference to the drawings.

[0032] In the specification and claims of the present application, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present application, but these terms are used herein only for the purpose of convenience of description and are determined based on the example orientation shown in the drawings. Since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating directions are only used for description and should not be considered as limitation, such as "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

[0033] Figures 1-7 Fig. 1 shows a preferred embodiment of the range hood of the present application. The range hood comprises a casing and a centrifugal fan 20 arranged in the casing, the casing generally comprises a fan frame 1 and a smoke collecting hood 30 arranged at the bottom of the fan frame 1, the inner cavity of the fan frame 1 is in communication with the inner cavity of the smoke collecting hood 30. The bottom of the smoke collecting hood 30 is provided with an air inlet, and external smoke can enter the smoke collecting hood 30 through the air inlet. The centrifugal fan 20 is arranged in the fan frame 1, and the centrifugal fan 20 generates negative pressure when operating, and external oil fume can be sucked into the smoke collecting hood 30 through the air inlet. The air inlet of the smoke collecting hood 30 comprises a main air inlet 31 located at the middle position and auxiliary air inlets located at the left and right sides of the main air inlet 31, the auxiliary air inlets comprise a first air inlet 321 located at the left side and a second air inlet 322 located at the right side. An oil screen is further arranged at the main air inlet 31 for filtering oil fume.

[0034] The fan stand 1 comprises a fan stand body 10 and two fairing covers 12 respectively located at left and right sides of the fan stand body 10. The two fairing covers 12 are respectively located at top rear sides of left and right side portions of the smoke collecting hood 30, and are both box structures arranged vertically. The left and right dimensions of the main body of the smoke collecting hood 30 are greater than the left and right dimensions of the fan stand body 10, wherein a first fairing cavity 331 is defined in the left side portion of the smoke collecting hood 30 (i.e. the shoulder portion protruding to the left relative to the fan stand body 10), and a second fairing cavity 332 is defined in the right side portion of the smoke collecting hood 30 (i.e. the shoulder portion protruding to the right relative to the fan stand body 10). The left and right sides of the bottom of the smoke collecting hood 30 are respectively provided with upwardly recessed smoke collecting cavities, i.e. a first smoke collecting cavity 341 located at the left side and a second smoke collecting cavity 342 located at the right side. The outer peripheral edges of the first and second smoke collecting cavities 341 and 342 are square in profile, and the top of the first smoke collecting cavity 341 is provided with a strip-shaped air inlet opening in communication with the first fairing cavity 331, which is the first air inlet opening 321. Similarly, the top of the second smoke collecting cavity 342 is provided with a strip-shaped air inlet opening in communication with the second fairing cavity 332, which is the second air inlet opening 322.

[0035] The right side portion of the left fairing cover 12 is in communication with the left side wall of the fan stand body 10. The bottom of the left fairing cover 12 is in communication with the rear top of the first fairing cavity 331 of the left side portion of the smoke collecting hood 30. The left side portion of the right fairing cover 12 is in communication with the right side wall of the fan stand body 10. The bottom of the right fairing cover 12 is in communication with the rear top of the second fairing cavity 332 of the right side portion of the smoke collecting hood 30.

[0036] The air volume adjusting plate assembly is movably arranged in a movable chamber formed by the inner space of the left and right fairing 12 and the inner space of the fan frame body 10. More specifically, the left fairing 12 is provided with a first guide plate 121 which is inclined upward from left to right, and the right fairing 12 is provided with a second guide plate 122 which is inclined upward from right to left. The air volume adjusting plate assembly includes a bottom plate 43, a left plate 41 arranged on the left side of the bottom plate 43 and inclined upward from left to right, and a right plate 42 arranged on the right side of the bottom plate 43 and inclined upward from right to left. The gap passage between the first guide plate 121 and the left plate 41 in the movable chamber forms a first air duct 1021 which is also inclined upward from left to right as a whole, so that the flue gas sucked from the first air inlet 321 can be guided into the inner cavity of the fan frame body 10. The inlet of the first air duct 1021 is in communication with the first guide cavity 331, and the outlet is correspondingly located in the inner part of the fan frame body 10. The gap passage between the second guide plate 122 and the right plate 42 in the movable chamber forms a second air duct 1022 which is also inclined upward from right to left as a whole, so that the flue gas sucked from the second air inlet 322 can be guided into the inner cavity of the fan frame body 10. The inlet of the second air duct 1022 is in communication with the second guide cavity 332, and the outlet is correspondingly located in the inner part of the fan frame body 10.

[0037] In some embodiments, the air volume adjusting plate assembly further includes a first support plate 44 connected between the top of the left plate 41 and the bottom plate 43, a second support plate 45 connected between the top of the right plate 42 and the bottom plate 43, and a top plate 46 connected between the first support plate 44 and the second support plate 45. The first support plate 44 and the second support plate 45 can increase the overall strength of the air volume adjusting plate assembly, and the top plate 46 located at the top position can block the space between the left plate 41 and the right plate 42, preventing the airflow from flowing downward and ensuring the smoothness of the airflow.

[0038] The air volume adjusting plate assembly is driven by a movement mechanism to move in the left-right direction to change the air volume of the first air duct 1021 and the second air duct 1022. Specifically, in the preferred embodiment, the movement mechanism includes a lead screw 52, a sliding block 53 sliding on the lead screw 52, and a driving motor (not shown) for driving the lead screw 52 to rotate. The lead screw 52 extends in the left-right direction and is rotatably arranged on the fan frame 1 or the smoke collecting hood 30, such as Figure 4As shown, the screw rod 52 is rotatably arranged in an isolated chamber in the rear region of the smoke hood 30. The bottom plate 43 of the air volume adjusting plate assembly has a downwardly extending support 431 connected with the sliding block. After the driving motor is started, the screw rod 52 can rotate in both directions, thereby driving the sliding block 53 and the air volume adjusting plate assembly to move along the length direction of the screw rod 52. When the air volume adjusting plate assembly moves to different positions to the left or to the right, the spacing between the first guide plate 121 and the left side plate 41 of the air volume adjusting plate assembly and the spacing between the second guide plate 122 and the right side plate 42 of the air volume adjusting plate assembly are different, so as to adjust the air volume of the first air duct 1021 and the second air duct 1022, and then the smoke suction effect of the first suction port 321 and the second suction port 322 on the left and right sides can be adjusted. When cooking on one side, the same side of the range hood corresponding to the cooking side can greatly improve the smoke suction effect and reduce the problem of smoke escaping. This structure design does not need to increase the total air volume of the centrifugal fan 20, that is, the impeller rotating speed of the centrifugal fan 20 can remain unchanged, which will not increase the noise problem and the energy consumption of the fan.

[0039] The adjustment of the left and right positions of the air volume adjusting plate assembly can be achieved by the user starting the driving motor to drive the air volume adjusting plate assembly to move, of course, the automatic adjustment of the position of the air volume adjusting plate assembly can also be achieved by detecting the oil smoke concentration on the left and right sides and feeding back to the controller, and then controlling the opening and closing of the driving motor by the controller.

[0040] The fan frame 1 of the embodiment is provided with a partition plate 11 extending vertically and arranged along the left and right directions. The partition plate 11 is in close contact with the rear cover plate of the centrifugal fan 20, so as to divide the space in the fan frame 1 into a front air duct 101 and a rear air duct 102, and the rear air duct 102 is located at the rear side of the front air duct 101. Figure 7 As shown, the front air duct 101 is in communication with the first air inlet 21 on the front side of the centrifugal fan 20, and the rear air duct 102 is in communication with the second air inlet 22 on the rear side of the centrifugal fan 20, that is, the first channel and the second channel are independent of each other, and the first air duct 1021 and the second air duct 1022 are part of the rear air duct 102. The front air duct 101 and the rear air duct 102 of the embodiment are independent of each other, so that the auxiliary suction ports on the left and right sides have independent air ducts and are not affected by the air duct of the main suction port 31, thereby making the smoke exhaust process of the auxiliary suction port have relatively stable air volume and air speed, and then ensuring the smoke suction effect.

[0041] The "fluid communication" in the utility model refers to the spatial position relation between two components or parts (hereinafter collectively referred to as a first part, a second part), that is, fluid (gas, liquid or mixture of both) can flow or / and be transported from the first part to the second part along the flow path, which can be directly connected between the first part and the second part, or indirectly connected between the first part and the second part through at least one third party, which can be a fluid passage such as a pipeline, a channel, a conduit, a flow guide, a hole, a groove, etc., or a chamber allowing fluid to flow or a combination thereof.

Claims

1. A range hood, comprising: a fan frame (1); a hood (30) located below the fan frame (1) and having a first air inlet (321) and a second air inlet (322) arranged at intervals in left and right directions at the bottom thereof; characterized in that the fan frame (1) further comprises a wind volume adjusting plate assembly which, together with the fan frame (1), defines a first air duct (1021) communicating with the first air inlet (321) and a second air duct (1022) communicating with the second air inlet (322), and the wind volume adjusting plate assembly is driven by a moving mechanism to move in left and right directions so as to change the air volume of the first air duct (1021) and the second air duct (1022).

2. The hood according to claim 1, characterized in that: The fan frame (1) comprises a fan frame body (10) and two guide covers (12) respectively located at left and right sides of the fan frame body (10) and arranged at the back, the right side of the guide cover (12) located at the left side communicates with the fan frame body (10), the bottom communicates with the top of the left side area of the hood (30), the left side of the guide cover (12) located at the right side communicates with the fan frame body (10), and the bottom communicates with the top of the right side area of the hood (30), and the wind volume adjusting plate assembly is movably arranged in a movable chamber formed by the inner space of the two guide covers (12) and the inner space of the fan frame body (10).

3. The hood according to claim 2, characterized in that: The guide cover (12) located at the left side is provided with a first guide plate (121) which is inclined upward from left to right, and the guide cover (12) located at the right side is provided with a second guide plate (122) which is inclined upward from right to left, the wind volume adjusting plate assembly comprises a bottom plate (43), a left side plate (41) arranged at the left side of the bottom plate (43) and inclined upward from left to right, and a right side plate (42) arranged at the right side of the bottom plate (43) and inclined upward from right to left, and a gap passage corresponding to the interval between the first guide plate (121) and the left side plate (41) in the movable chamber constitutes the first air duct (1021), and a gap passage corresponding to the interval between the second guide plate (122) and the right side plate (42) in the movable chamber constitutes the second air duct (1022).

4. The hood according to claim 3, characterized in that: The moving mechanism comprises a lead screw (52), a sliding block (53) slidingly arranged on the lead screw (52), and a driving motor for driving the lead screw (52) to rotate, the lead screw (52) extends in left and right directions and is rotatably arranged on the fan frame (1) or the hood (30), and the wind volume adjusting plate assembly is connected with the sliding block (53) and can move along the length direction of the lead screw (52) with the sliding block (53).

5. The hood according to claim 4, characterized in that: The bottom plate (43) of the wind volume adjusting plate assembly is further provided with a bracket (431) extending downward, and the bracket (431) is connected with the sliding block.

6. The hood according to claim 3, characterized in that: The air volume adjusting plate assembly further comprises a first support plate (44) connected between the top of the left side plate (41) and the bottom plate (43), a second support plate (45) connected between the top of the right side plate (42) and the bottom plate (43), and a top plate (46) connected between the first support plate (44) and the second support plate (45).

7. The hood according to claim 2, characterized in that: The left side of the smoke collecting cover (30) defines a first flow guide cavity (331), and the bottom of the first air duct (1021) is in communication with the top of the rear side of the first flow guide cavity (331). The right side of the smoke collecting cover (30) defines a second flow guide cavity (332), and the bottom of the second air duct (1022) is in communication with the top of the rear side of the second flow guide cavity (332).

8. The hood according to claim 7, characterized in that: The bottom of the smoke collecting cover (30) further forms a first smoke collecting cavity (341) and a second smoke collecting cavity (342) respectively on the left side and the right side, and the top of the first smoke collecting cavity (341) has a first air inlet (321) in communication with the first flow guide cavity (331), and the top of the second smoke collecting cavity (342) has a second air inlet (322) in communication with the second flow guide cavity (332).

9. The hood according to any one of claims 1-8, characterized in that: The bottom of the smoke collecting cover (30) further has a main air inlet (31) in the middle area in the left-right direction, and the first air inlet (321) and the second air inlet (322) are respectively located on the left side and the right side of the main air inlet (31).

10. The hood according to claim 9, characterized in that: The inside of the fan frame (1) is provided with a centrifugal fan (20), and the centrifugal fan (20) has a first air inlet (21) and a second air inlet (22) opposite to each other. The inside of the fan frame (1) defines a front air duct (101) and a rear air duct (102) arranged in sequence in the front-rear direction, and the front air duct (101) is in fluid communication with the first air inlet (21) and the main air inlet (31), and the rear air duct (102) is in fluid communication with the second air inlet (22), the first air inlet (321) and the second air inlet (322). The first air duct (1021) and the second air duct (1022) also constitute a part of the rear air duct (102).

11. The hood according to claim 10, characterized in that: The inside of the fan frame (1) is provided with a partition plate (11) extending vertically and arranged in the left-right direction, and the partition plate (11) is connected with the centrifugal fan (20), so as to divide the space in the fan frame (1) into the front air duct (101) and the rear air duct (102).

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