Range hood

Abstract

The utility model relates to a range hood, which comprises: an exhaust fume collecting hood, which is hollow inside to form a cavity and has an upward concave exhaust fume collecting cavity at the bottom; the side, facing a user, of the exhaust fume collecting hood serves as the front side, a front air inlet and a rear air inlet are formed in the wall of the exhaust fume collecting cavity, the front air inlet extends leftwards and rightwards and communicates with the cavity, the rear air inlet is located in the rear side of the front air inlet, and the air inlet area of the front air inlet is larger than that of the rear air inlet. A switch piece for opening or closing the front air inlet is arranged at the front air inlet; the rear air inlet is located on the lower side of the front air inlet. According to the range hood, the front air inlet can be opened or closed according to cooking conditions so as to ensure a better oil smoke suction effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of kitchen appliances, and particularly relates to a range hood. BACKGROUND

[0002] The range hood is a kind of kitchen appliance for purifying kitchen environment. Generally, the range hood includes top suction type and side suction type. The top suction type range hood generates a negative pressure area above the cooking table by using the principle that oil fume rises upward, and the oil fume generated during cooking is sucked and discharged. However, since the installation height of the top suction type range hood is far away from the cooking table, the oil fume is easily disturbed by the external environment during the upward rising process, and the problem of escaping to the surrounding area occurs, which affects the oil fume suction effect.

[0003] The traditional top suction type range hood mainly adopts the structure of installing a conical filter screen in the middle of the smoke collecting cover. For example, the Chinese utility model patent with the application number CN200720111155.8 and the authorized publication number CN201059659U discloses a top suction type range hood structure with a smoke collecting cavity. The flue of the range hood of this structure is straight up and straight down, and the oil fume is easy to escape to the surrounding area, so the efficiency of the range hood is not high.

[0004] At present, the top suction type range hood also sets a butterfly wing plate and other smoke guide plates below the air inlet, and uses the wall attachment effect to improve the oil fume suction effect. For example, the Chinese utility model patent with the application number CN202121316860.8 and the authorized publication number CN216079941U discloses a range hood, and the Chinese utility model patent with the application number CN202322337014.X and the authorized publication number CN220541188U discloses a range hood. However, the existing smoke guide plates are mostly installed through buckles and other detachable structures. The oil drops in the range hood fall on the upper plate surface of the smoke guide plate, and the user cleans the smoke guide plate by detaching it. However, when the smoke guide plate is detached, the oil drops are easily thrown out and fall, and the size of the smoke guide plate is generally larger than that of the household sink, so the smoke guide plate is not easy to clean. At the same time, since the negative pressure cavity is in the middle of the smoke collecting cavity, the oil fume channel is from the surrounding area to the middle, which easily causes the surface of the smoke collecting cavity and the smoke guide plate to be covered with oil, and the oil drops vertically fall, which pollutes the cooking appliance and the food in the pot.

[0005] The existing top suction type range hood also has a double-cavity double-plate structure, such as a double-cavity air inlet independent control tower type European range hood disclosed in a Chinese utility model patent with the application number CN201420505325.0 and the authorization announcement number CN204373015U, which comprises a main machine and a smoke collecting hood. The smoke collecting hood has a left-right double-cavity structure, and a horizontal block is arranged between the double cavities. An oil cup is arranged on the horizontal block. A net plate combination capable of being opened and closed is arranged in each of the double cavities and covers the air inlet of the smoke collecting hood. The net plate combination is inclined outwardly and downwardly along the left-right direction of the smoke collecting hood. The net plate combination and the side wall of the smoke collecting hood form a conical range hood cavity. The small mesh net around the net plate of the range hood is easy to be blocked by oil stains, and there is a cleaning dead angle. In addition, there is no flow guide structure in the range hood, and the air duct is not smooth.

[0006] Therefore, the existing top suction type range hood needs to be further improved. Utility model content

[0007] The utility model solves the technical problem in the prior art, and provides a range hood which can be adjusted according to the amount of oil fume generated during cooking to ensure the oil fume suction effect.

[0008] The utility model adopts the technical scheme that a range hood comprises the following parts:

[0009] The smoke collecting hood is internally hollow to form a cavity, and has a concave smoke collecting cavity at the bottom;

[0010] Characterized in that:

[0011] The side of the smoke collecting hood facing the user is the front side, the wall of the smoke collecting cavity is provided with a front air inlet extending leftward and rightward and communicating with the cavity and a rear air inlet located at the rear side of the front air inlet, the air inlet area of the front air inlet is greater than that of the rear air inlet, and a switch member for opening or closing the front air inlet is arranged at the front air inlet; and the rear air inlet is located at the lower side of the front air inlet.

[0012] In this way, when the range hood is in a non-working state, the front air inlet is closed; when cooking or boiling water, the amount of oil fume is small, at this time, the range hood works, the front air inlet is still in the closed state, the rear air inlet is in a negative pressure state, and the rear air inlet is located at the lower side of the front air inlet and relatively close to the cooking pot, so that the smoke generated during cooking or boiling water rises upward for a short distance and then enters the smoke collecting hood through the rear air inlet, thereby ensuring the oil fume suction effect; when stir-frying, the amount of oil fume is large, at this time, the front air inlet can be opened, so that the front air inlet serves as the main air inlet and the rear air inlet serves as the auxiliary air inlet to suck the oil fume into the smoke collecting hood. Thus, the utility model can open or close the front air inlet according to the cooking condition to ensure a better oil fume suction effect.

[0013] Preferably, the smoke collecting cavity has a top wall which is downwardly inclined from front to back, a side wall which extends downwardly from the periphery of the top wall, a front side portion of the top wall is provided with the front air inlet, and a rear side portion of the top wall is provided with the rear air inlet. Thus, the top wall of the smoke collecting cavity can function to receive oil stains, and the oil stains can flow downwardly along the top wall to be collected at one place.

[0014] Preferably, the front air inlet includes two strip-shaped air inlets which extend leftward and rightward, and the two strip-shaped air inlets are arranged in a left-right spaced manner and are opened or closed by the same switch member. In addition, the strip-shaped air inlet can also be only one.

[0015] In order to collect the oil stains, an oil cup is preferably further arranged below the rear air inlet to receive the oil stains dripping from the rear air inlet.

[0016] In the above-mentioned solutions, the switch member preferably includes a plate body which extends leftward and rightward and is movable to shield or open the front air inlet under the action of a driving mechanism.

[0017] Preferably, when the front air inlet is opened, the plate body is inclined rearwardly from bottom to top and is located above and rearward of the front air inlet. In this way, the front air inlet when opened will not block the user's view, and at the same time can guide the oil fume to flow upwardly into the smoke collecting hood.

[0018] Further, the plate body has a first plate surface and a second plate surface.

[0019] When the front air inlet is opened, the first plate surface of the plate body is arranged forwardly as a flow guide surface, and the second plate surface of the plate body is arranged rearwardly.

[0020] When the front air inlet is closed, the first plate surface of the plate body is arranged upwardly, the second plate surface of the plate body is arranged downwardly and is exposed above the front air inlet.

[0021] Thus, when the range hood is working and the front air inlet is opened, the first plate surface of the plate body as a flow guide surface can guide the oil fume to flow upwardly, at this time, the oil stains will adhere to the first plate surface of the plate body, and the second plate surface of the plate body has less oil stains. When the front air inlet is closed, the second plate surface of the plate body with less oil stains is arranged downwardly, and the first plate surface of the plate body with more oil stains is arranged upwardly, which can improve the user's experience, and at the same time, the oil stains adhering to the first plate surface can flow downwardly in the smoke collecting hood to be collected into the oil cup.

[0022] Preferably, the driving mechanism includes:

[0023] a motor arranged in the smoke collecting hood, and a rotating shaft of the motor extending leftward and rightward;

[0024] a driving rocker which has a first end sleeved on the outer periphery of the rotating shaft of the motor and can rotate with the rotating shaft;

[0025] a connecting rod, whose first end is rotatably connected with the second end of the driving rocker and whose rotation axis extends left and right;

[0026] a linkage rocker, whose central portion is rotatably connected with the second end of the connecting rod and whose rotation axis extends left and right, and whose first end is rotatably connected with the fume hood directly or indirectly and whose rotation axis extends left and right;

[0027] a connecting bracket, which is rotatably connected with the second end of the linkage rocker and whose rotation axis extends left and right, and which is constrained with the first plate surface of the plate body, and the connecting bracket is provided with a slide rod extending away from the first plate surface of the plate body;

[0028] a slide rod seat, which is provided with a plug hole for the slide rod to be inserted and longitudinally moved, and which is rotatably connected with the fume hood directly or indirectly and whose rotation axis extends left and right.

[0029] In the above-mentioned schemes, preferably, further comprising:

[0030] a fan frame, which is arranged above the fume hood and is in communication with the chamber inside the fume hood;

[0031] a centrifugal fan, which is arranged in the fan frame and is located at the front side of the rear air inlet and the rear side of the front air inlet.

[0032] Compared with the prior art, the advantages of the oil fume extractor lie in that: when the oil fume extractor is in a non-working state, the front air inlet is closed; when steaming or boiling water, the oil fume amount is small, at this time, the oil fume extractor works, the front air inlet is still in a closed state, the rear air inlet is in a negative pressure state, and the rear air inlet is located below the front air inlet and relatively close to the steaming pot, so that the smoke generated by steaming or boiling water is short-distance upwardly rising and then enters the fume hood through the rear air inlet, thereby ensuring the oil fume extraction effect; when explosive frying, the oil fume amount is large, at this time, the front air inlet can be opened, so that the front air inlet serves as a main air inlet and the rear air inlet serves as an auxiliary air inlet to suck the oil fume into the fume hood. Thus, the oil fume extractor can open or close the front air inlet according to the cooking condition to ensure a better oil fume extraction effect. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 a structure schematic view of the oil fume extractor according to the embodiment of the present application (the front air inlet is closed);

[0034] Figure 2 is Figure 1 a longitudinal sectional view of the oil fume extractor (the sectional plane is a vertical plane extending front and back);

[0035] Figure 3 is Figure 1 a transverse sectional view of the oil fume extractor (the sectional plane is a horizontal plane);

[0036] Figure 4For Figure 3 An enlarged view of part A in Fig. 1;

[0037] Figure 5 A perspective exploded view of the driving mechanism in the embodiment of the utility model;

[0038] Figure 6 A structural schematic view of the range hood (front air inlet open) in the embodiment of the utility model;

[0039] Figure 7 For Figure 6 A partial longitudinal sectional view of the range hood (the section plane is a vertical plane extending front and back) in Fig. 1;

[0040] Figure 8 For Figure 6 A transverse sectional view of the range hood (the section plane is a horizontal plane) in Fig. 1;

[0041] Figure 9 For Figure 8 An enlarged view of part B in Fig. 1. DETAILED DESCRIPTION

[0042] The utility model will be described in further detail below in combination with the embodiment of the drawings.

[0043] As Figures 1-9 shown, it is a preferred embodiment of the range hood of the utility model, and the range hood comprises a smoke collecting hood 1, an oil cup 2, a switch piece 3, a fan frame 4 and a centrifugal fan 5.

[0044] The bottom of the smoke collecting hood 1 has a concave smoke collecting cavity 10, and the side of the smoke collecting hood 1 facing the user is the front side, the smoke collecting cavity 10 has a top wall 11 downwardly inclined from front to back, a side wall 12 extending downward from the periphery of the top wall 11, and the front side portion of the top wall 11 is provided with left and right extending front air inlets 101, and the rear side portion of the top wall 11 is provided with left and right extending rear air inlets 102. The rear air inlets 102 are located below the front air inlets 101, and the air inlet area of the rear air inlets 102 is smaller than that of the front air inlets 101. In the embodiment, the front air inlets 101 comprise two left and right extending strip-shaped inlets 1011, and the two strip-shaped inlets 1011 are arranged in a left-right interval. At the same time, the cover body of the smoke collecting hood 1 is peripherally arranged around the smoke collecting cavity 10, and the lower edge of the cover body side wall 13 is engaged with the lower edge of the corresponding smoke collecting cavity 10 side wall 12 to jointly form a chamber 100 inside the smoke collecting hood 1, and the chamber 100 is communicated with the outside through the front air inlets 101 and the rear air inlets 102. And the joint between the rear side portion of the cover body side wall 13 and the smoke collecting cavity 10 rear side side wall 12 is provided with an oil leakage hole for the oil droplets in the chamber 100 to fall down.

[0045] In order to collect oil drops, the oil cup 2 is arranged below the smoke collecting hood 1, and the cup opening of the oil cup 2 faces upward and is opposite to the oil leakage hole and the rear air inlet 102, so that the oil drops flowing down from the rear air inlet 102 and the oil drops in the internal chamber 100 of the smoke collecting hood can be received.

[0046] The fan frame 4 and the centrifugal fan 5 are both prior art, and the fan frame 4 is arranged above the smoke collecting hood 1 and is connected to the inside of the smoke collecting hood 1. The centrifugal fan 5 is arranged in the fan frame 5 and is located in front of the rear air inlet 102 and behind the front air inlet 101, and is used to drive the oil fume to flow into the smoke collecting hood and the fan frame from the front air inlet and the rear air inlet, and to be discharged from the air outlet at the top of the fan frame 4.

[0047] The switch 3 is arranged at the front air inlet 101 to open or close the front air inlet 101. Specifically, the switch 3 includes a left and right extending plate body 31, the plate body 31 has a first plate face 311 and a second plate face 312, and the plate body 31 is movable under the action of a driving mechanism 32 to simultaneously block the two strip-shaped openings 1011 (i.e. to close the front air inlet 101) or to simultaneously open the two strip-shaped openings 1011 (i.e. to open the front air inlet 101). When the front air inlet 101 is opened, the plate body 31 is inclined from bottom to top and rearward, and is located above and rearward of the front air inlet 101, the first plate face 311 of the plate body 31 is arranged forward as a flow guide face, and the second plate face 312 of the plate body 31 is arranged rearward. For details, please refer to Figure 7 At this time, the plate body 31 can play a role of a flow guide plate to promote the oil fume to flow into the smoke collecting hood 1, and the plate body 31 will not block the user's view when it is opened. As shown in Figure 2 When the front air inlet 101 is closed, the plate body 31 covers the front air inlet 101 and is inclined downward from front to rear as a whole, and the first plate face 311 of the plate body 31 faces upward and the second plate face 312 faces downward and is exposed above the front air inlet 101. At this time, the oil stains on the first plate face 311 can flow downward along the first plate face 311 to the top wall 11 under the action of gravity, and then flow downward along the top wall 11 to be collected into the oil cup 2. The second plate face 311 with less oil stains can be seen by the user, which improves the user's experience.

[0048] As shown in Figures 3-5 and Figure 8 , 9As shown, in order to drive the plate body 31 to move, the driving mechanism 32 includes a motor 320, a driving rocker 322, a connecting rod 323, a linkage rocker 324, a connecting bracket 325 and a slide rod seat 327. The motor 320 is arranged at the right side of the fume hood 1, and the motor shaft 321 extends to the left. The first end of the driving rocker 322 is sleeved on the outer periphery of the motor shaft 321 and can rotate with the motor shaft 321. The first end of the connecting rod 323 is rotatably connected with the second end of the driving rocker 322, and the rotation axis extends left and right. The central part of the linkage rocker 324 is rotatably connected with the second end of the connecting rod 323, and the rotation axis extends left and right. The first end of the linkage rocker 324 is rotatably connected with the base 328 in the fume hood 1, and the rotation axis extends left and right. The connecting bracket 325 is rotatably connected with the second end of the linkage rocker 324, and the rotation axis extends left and right. The connecting bracket 325 is constrained with the first plate surface 311 of the right side of the plate body 31, and the slide rod 326 extends away from the first plate surface 311 of the plate body 31. The slide rod seat 327 is provided with a hole for the slide rod 326 to insert and move longitudinally, and the slide rod seat 327 is rotatably connected with the base 328 and the rotation axis extends left and right.

[0049] At the same time, in order to support the left side of the plate body 31, so that the whole plate body 31 can move stably under the action of the driving mechanism 32, the base 328, the linkage rocker 324, the connecting bracket 325, the slide rod 326 and the slide rod seat 327 are also arranged at the left side of the fume hood 1 in this embodiment. The connection relationship between the five is the same as that in the driving mechanism 32, and will not be repeated here.

[0050] When the motor 320 is energized, the motor shaft 321 drives the driving rocker 322 to rotate, the driving rocker 322 drives the connecting rod 323 to move, and the connecting rod 323 drives the linkage rocker 324 to move. Since the first end of the linkage rocker 324 is rotatably connected with the base 328, the linkage rocker 324 rotates in a circle under the action of the connecting rod 323, drives the connecting bracket connected with the second end of the linkage rocker 324 to move, and drives the slide rod 326 to move in and out of the slide rod seat 327 and the slide rod seat 327 to rotate relative to the base 328, realizing the non-point rotation of the connecting bracket. At the same time, it can be realized in a small space inside the fume hood.

[0051] As shown in Figure 1 , 2 When the range hood is in a non-working state, the front air inlet is closed; when cooking or boiling water, the amount of oil fume is small, at this time the range hood works, the front air inlet is still in a closed state, the rear air inlet is in a negative pressure state, and the rear air inlet is located below the front air inlet and relatively close to the cooking pot, so that the smoke generated by cooking or boiling water rises a short distance upward and then enters the fume hood through the rear air inlet, ensuring the oil fume suction effect, and the oil fume flow path is as shown in Figure 2The middle arrow indicates;

[0052] As Figure 6 , 7 When frying, the oil fume amount is large, at this time, the front air inlet can be opened, so that the front air inlet serves as the main air inlet, and the rear air inlet serves as the auxiliary air inlet to suck the oil fume into the smoke collecting hood.

[0053] And when the front air inlet is closed, only the side wall and the top wall of the smoke collecting cavity 10 need to be wiped, which is convenient for cleaning.

[0054] In the description and claims of the present application, terms are used to describe various example structures, components, and elements illustrated in the figures. When the adjectives "front", "back", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used to describe the various example structures and elements, these adjectives are not to be construed as limiting the scope of the application, but are merely used to facilitate the description. For example, "upper" and "lower" are not necessarily defined as directions in opposition to, or in agreement with, a gravitational force.

Claims

1. A range hood comprising: a hood (1) having a chamber (100) formed in the interior thereof, and having a concave smoke collecting cavity (10) at the bottom thereof; characterized in that: a front side of the hood (1) faces a user, and a front air inlet (101) extending leftward and rightward and communicating with the chamber (100) is arranged on a wall of the smoke collecting cavity (10), and a rear air inlet (102) located at a rear side of the front air inlet (101) is arranged on the wall of the smoke collecting cavity (10), an air inlet area of the front air inlet (101) is greater than an air inlet area of the rear air inlet (102), and a switch member (3) for opening or closing the front air inlet (101) is arranged at the front air inlet (101), and the rear air inlet (102) is located at a lower side of the front air inlet (101).

2. The hood according to claim 1, characterized in that: the smoke collecting cavity (10) has a top wall (11) inclined downward from front to rear, and a side wall (12) extending downward from a periphery of the top wall (11), a front side portion of the top wall (11) is provided with the front air inlet (101), and a rear side portion of the top wall (11) is provided with the rear air inlet (102).

3. The hood according to claim 2, characterized in that: the front air inlet (101) comprises two strip-shaped air inlets (1011) extending leftward and rightward, the two strip-shaped air inlets (1011) are arranged in a left-right interval, and are opened or closed by the same switch member (3).

4. The hood according to claim 2, characterized in that: further comprising an oil cup (2) arranged below the rear air inlet (102) and used for receiving oil stains dripping from the rear air inlet (102).

5. The hood according to any one of claims 1 to 4, characterized in that: the switch member (3) comprises a plate body (31) extending leftward and rightward, and the plate body (31) is driven by a driving mechanism (32) to shield or open the front air inlet (101).

6. The hood according to claim 5, characterized in that: when the front air inlet (101) is opened, the plate body (31) is inclined rearward from bottom to top and located above and at a rear side of the front air inlet (101).

7. The hood according to claim 6, characterized in that: the plate body (31) has a first plate surface (311) and a second plate surface (312). when the front air inlet (101) is opened, the first plate surface (311) of the plate body (31) is arranged forward as a flow guide surface, and the second plate surface (312) of the plate body (31) is arranged rearward. when the front air inlet (101) is closed, the first plate surface (311) of the plate body (31) is arranged upward, the second plate surface (312) of the plate body (31) is arranged downward, and the first plate surface (311) and the second plate surface (312) of the plate body (31) are exposed above the front air inlet (101).

8. The hood according to claim 7, characterized in that: the driving mechanism (32) comprises: a motor (320) arranged in the hood (1) and having a rotating shaft (321) extending leftward and rightward; a driving rocker (322) having a first end sleeved on an outer periphery of the rotating shaft (321) and being able to rotate with the rotating shaft (321); a connecting rod (323) having a first end rotatably connected with a second end of the driving rocker (322) and having a rotating axis extending leftward and rightward; a linkage rocker (324) having a central portion rotatably connected with a second end of the connecting rod (323) and having a rotating axis extending leftward and rightward, and having a first end rotatably connected with the hood (1) directly or indirectly and having a rotating axis extending leftward and rightward. A connecting bracket (325) is rotationally connected with the second end of the linkage rocker (324) and has an axis extending left and right, and is constrained with the first plate surface (311) of the plate body (31), and the connecting bracket (325) is provided with a sliding rod (326) extending away from the first plate surface (311) of the plate body (31); A sliding rod seat (327) is provided with a insertion hole for the sliding rod (326) to insert and longitudinally move, and the sliding rod seat (327) is rotationally connected with the smoke collecting cover (1) directly or indirectly and has an axis extending left and right.

9. The hood according to any one of claims 1-4, characterized in that Further comprising: A fan frame (4) is arranged above the smoke collecting cover (1) and communicates with the chamber (100) inside the smoke collecting cover (1); A centrifugal fan (5) is arranged in the fan frame (4) and is located in front of the rear air inlet (102) and behind the front air inlet (101).

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