CN213713175U

CN213713175U - Fume exhaust fan

Info

Publication number: CN213713175U
Application number: CN202022047193.XU
Authority: CN
Inventors: 杨伟刚; 黄友根; 李斌; 王曼
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-07-16
Anticipated expiration: 2030-09-17

Abstract

The utility model discloses a range hood, including the casing, its characterized in that: first air intake has been seted up respectively to the left and right sides of casing lower part, and every first air intake from top to bottom slopes to the centre from the side gradually, casing upper portion front side is provided with the air inlet subassembly, the second air intake has been seted up to the bottom of air inlet subassembly, the second air intake and the interior fluid intercommunication of casing. Compared with the prior art, the utility model has the advantages of: the first air inlets are formed in the two sides of the lower portion of the shell, the second air inlets are formed in the front side of the upper portion of the shell, the advantages of low suction, side suction and top suction are fully utilized, the first air inlets guarantee that most of oil smoke is sucked, the oil smoke is prone to being disturbed to escape under the condition that air flows or a pan is lifted, and the second air inlets in the top end guarantee that the oil smoke escaping under the condition is sucked, so that a good oil smoke suction effect is achieved under the cooking states of small oil smoke amount and large oil smoke amount.

Description

Fume exhaust fan

Technical Field

The utility model relates to an oil smoke purifier, especially a range hood.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

Currently, the common range hoods on the market include a top suction type, a side suction type and a bottom suction type.

The top-suction type range hood adopts an oil smoke rising principle, generates a negative pressure area right above a cooking bench, and sucks and exhausts naturally rising oil smoke generated during cooking.

The side-suction type range hood has the advantages that the side-suction type range hood is thin in body and not easy to touch the head when in operation, and has a good range hood effect because the installation height is low and the negative pressure area is close to a smoke source in a cooking state with small oil smoke amount.

The top suction type and the side suction type both have the defect of larger overall size, can not be completely wrapped by the cabinet when the cabinet normally works, and have poor hiding effect and aesthetic property.

The suction inlet of the downdraft range hood is closer to a cooking bench, the negative pressure area is close to a smoke source, the path of the movement of the smoke is reduced, and compared with other two forms, the downdraft range hood has a better smoke absorption effect, but has the following problems: firstly, under the condition of large oil smoke such as stir-frying, because the distribution range of the inlet negative pressure area is smaller, the capacity of capturing the oil smoke which is fried at high speed is poor, and the oil smoke is easy to escape to the periphery. When the top spoon is operated and the cooking is carried out in a high-pressure cooker (steamer), the installation height of the suction inlet from the cooking bench is 380 plus 420mm, the operation space is limited, certain depression is achieved, and bad experience is brought to users.

In order to improve the oil smoke absorption effect, the existing range hood combines the above modes, for example, chinese patents with application numbers 201320250895.5 and 201610588598.X disclose a top-suction type range hood, and in a cooking state with small oil smoke amount, a top smoke absorption port is also in an open state, which causes a negative pressure area of a bottom suction port to be reduced, effective air amount to be reduced, and the oil smoke absorption effect to be deteriorated. The application number is 201320124231.4's chinese patent discloses a three air inlet roof range hood, under the single pot culinary art state of little oil smoke volume, because the lampblack absorber air intake is many, the import runner is long, and single sunction inlet negative pressure zone is little, and effective fan reduces, and the oil absorption cigarette effect is relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art existence, provide a range hood, promote the oil smoke suction flow rate, avoid the oil smoke to escape.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a range hood, includes the casing, its characterized in that: first air intake has been seted up respectively to the left and right sides of casing lower part, and every first air intake from top to bottom slopes to the centre from the side gradually, casing upper portion front side is provided with the air inlet subassembly, the second air intake has been seted up to the bottom of air inlet subassembly, the second air intake and the interior fluid intercommunication of casing.

In order to bring the first air inlet into the smoke, a smoke baffle plate is arranged on the side face of the shell corresponding to the first air inlet and can open or close the first air inlet.

Preferably, in order to facilitate the action of automatically driving the smoke baffle, the top end of the smoke baffle is hinged with the shell, and the shell is further provided with a movement mechanism for driving the smoke baffle to overturn relative to the shell.

Preferably, in order to automatically control the smoke baffle according to the cooking state, a first temperature sensor and a second temperature sensor are respectively arranged at positions, close to the first air inlet, of the front side of the shell, the first temperature sensor is arranged at a position, close to the left bottom, of the shell, and the second temperature sensor is arranged at a position, close to the right bottom, of the shell; the range hood also comprises a control circuit for controlling the movement mechanism according to the data detected by the first temperature sensor and the second temperature sensor.

Preferably, the control circuit comprises a first feedback processing circuit, a first adjusting loop, a second feedback processing circuit, a second adjusting loop, a judging circuit and a smoke baffle motion adjusting circuit, wherein one input end of the first feedback processing circuit is connected with a first temperature sensor serving as a first monitoring unit, the other input end of the first feedback processing circuit is connected with the first adjusting loop, one input end of the second feedback processing circuit is connected with a second temperature sensor serving as a second monitoring unit, the other input end of the second feedback processing circuit is connected with the second adjusting loop, the respective output ends of the first feedback processing circuit and the second feedback processing circuit are respectively connected with the input end of the judging circuit, and the output end of the judging circuit is connected with the input end of the smoke baffle motion adjusting circuit used for controlling the motion mechanism.

In order to form the smoke collecting cavity for top suction, the air inlet assembly comprises a first baffle and second baffles positioned on the left side and the right side of the first baffle, the top of the first baffle is fixedly connected with the shell, the first baffle is gradually inclined forwards from top to bottom, the second baffles are gradually increased from top to bottom, and a second air inlet is formed between the bottom of the first baffle and the corresponding position of the shell.

In order to reduce the volume of the whole machine and save space, the air inlet of the fan is closer to a smoke source, the effect of absorbing oil smoke is improved, and the fan system is arranged in the shell.

In order to filter oil smoke conveniently, first air inlet department is provided with first filter screen, second air inlet department is provided with the second filter screen.

In order to collect grease conveniently, an oil cup is arranged at the position, between the two first air inlets, of the bottom of the shell.

Preferably, in order to guide grease in the casing into the oil cup, a part of the casing between the front sides of the two first air inlets forms a front side wall which is inclined from top to bottom gradually, a bottom wall which is inclined from front to back gradually downwards is arranged at the bottom of the casing, and an oil leakage hole is formed in the position, corresponding to the oil cup, of the rear end of the bottom wall.

Compared with the prior art, the utility model has the advantages of: the first air inlets are formed in the two sides of the lower portion of the shell, the second air inlets are formed in the front side of the upper portion of the shell, the advantages of low suction, side suction and top suction are fully utilized, the first air inlets ensure that most of oil smoke is sucked, the oil smoke is prone to being disturbed to escape under the condition that air flows or a pan is lifted, and the second air inlets at the top end ensure that the escaping oil smoke is sucked under the condition, so that a good oil smoke suction effect is achieved under the cooking states of small oil smoke amount and large oil smoke amount; by arranging the turnover smoke baffle plate, the cooking device has better smoke absorption effect in the cooking states of a single pot and double pots; the cooking state is monitored through the temperature sensor, so that the actions of the two smoke baffles are controlled, the opening and closing of the first air inlets are automatically controlled, the negative pressure area and the effective air volume of each first air inlet are ensured under different cooking states, and the oil smoke absorption effect is enhanced; the fan system is arranged below to form a structure without a fan frame, the resistance of the whole air channel is small, the distance between the inlet of the fan system and a smoke source is short, the air speed is high under the condition of the same rotating speed, the smoke suction effect is good, the volume is reduced, the occupied space is saved, the material consumption of the whole machine is less, the cost is low, the upper cabinet is saved during installation, the structure is compact, and the operation sight is good; the oil way design formed by the filter screen, the front side wall and/or the bottom wall can effectively ensure that oil flows into the oil cup.

Drawings

Fig. 1 is a schematic front view of a range hood according to an embodiment of the present invention;

fig. 2 is a schematic side view of a range hood according to an embodiment of the present invention;

fig. 3 is a sectional view of the range hood according to the embodiment of the present invention;

fig. 4 is a schematic view of an installation state of the range hood according to the embodiment of the present invention;

fig. 5 is a block diagram of a control circuit of the range hood according to the embodiment of the present invention;

fig. 6 is a control flow chart of the range hood according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the disclosed embodiments of the invention may be oriented in different directions and the directional terms are intended to be illustrative and should not be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 to 3, a range hood includes a housing 1, a fan system 2 disposed in the housing 1, and an oil cup 3 disposed at the bottom of the housing 1.

First air inlets 11 are respectively formed in the left side and the right side of the lower portion of the shell 1, each first air inlet 11 is gradually inclined from the side to the middle from top to bottom, namely, the first air inlet 11 on the left side is inclined from the left side to the middle from top to bottom, and the first air inlet 11 on the right side is inclined from the right side to the middle from top to bottom. The oil cup 3 is arranged at the bottom of the shell 1 between the two first air inlets 11. A first filter 12 may be disposed at the first air inlet 11 to filter the oil smoke. The portion of the casing 1 between the front sides of the two first air inlets 11 forms a front side wall 13 which is inclined gradually backward from top to bottom. The bottom of the shell 1 is provided with a bottom wall 14 which is gradually inclined downwards from front to back, and the rear end of the bottom wall 14 corresponding to the oil cup 3 is provided with an oil leakage hole 141.

The upper front side of the shell 1 is provided with an air inlet assembly 4, the air inlet assembly 4 comprises a first baffle plate 41 positioned on the front side and second baffle plates 42 positioned on the left and right sides of the first baffle plate 41, the top of the first baffle plate 41 can be fixedly connected with the shell 1, the first baffle plate 41 is gradually inclined forwards from top to bottom, the second baffle plates 42 can be roughly triangular and gradually increase from top to bottom, the bottom of the second baffle plates 42 can be an arc protruding downwards, and a space between the first baffle plate 41 and the second baffle plates 42 forms a cavity for holding cigarettes together. A second air inlet 43 is formed between the bottom of the first baffle 41 and the corresponding position of the casing 1, a second filter screen 44 can be arranged at the second air inlet 43, the second filter screen 44 can also be in an arc shape protruding downwards, and the left side and the right side of the second filter screen 44 are respectively connected with the second baffle 42 at the corresponding position. The intake assembly 4 is in fluid communication with the interior of the housing 1.

In this embodiment, both the first screen 12 and the second screen 44 may be a grated mesh.

The side of the casing 1 is provided with a smoke baffle 5 at a position corresponding to the first air inlet 11, and the top end of the smoke baffle 5 is hinged to the casing 1, so that the smoke baffle 5 can be turned over relative to the casing 1, and the first air inlet 11 can be opened or closed. The axis of rotation of the smoke barrier 5 extends forward and rearward. The housing 1 may be further provided with a moving mechanism 6 for driving the smoke barrier 5 to turn, and the moving mechanism 6 may be a combination of a stepping motor 61 and a connecting rod 62 (which may be hinged by a plurality of connecting rods) as commonly used in the art.

In order to automatically control the moving mechanism 6, a first temperature sensor 71 and a second temperature sensor 72 are respectively disposed at a position on the front side of the casing 1 near the first air inlet 11, wherein the first temperature sensor 71 is disposed at a position on the casing 1 near the bottom of the left side, and the second temperature sensor 72 is disposed at a position on the casing 1 near the bottom of the right side. The action of the corresponding motion mechanism 6 can be controlled according to the temperatures detected by the two temperature sensors, and the opening and closing of the smoke baffle 5 under different cooking states can be controlled according to the control circuit.

Referring to fig. 5, the control circuit of the motion mechanism 6 is shown, and includes a first feedback processing circuit 81, a first adjusting circuit 82, a second feedback processing circuit 83, a second adjusting circuit 84, a judging circuit 85, and a smoke barrier motion adjusting circuit 86, wherein one input end of the first feedback processing circuit 81 is connected to the first temperature sensor 71 as a first monitoring unit, the other input end is connected to the first adjusting circuit 82, one input end of the second feedback processing circuit 83 is connected to the second temperature sensor 72 as a second monitoring unit, and the other input end is connected to the second adjusting circuit 84. The two feedback processing circuits can be amplifying circuits, and play a role in strengthening the original input signals (rotating speed signals) so as to strengthen or weaken the input signals. Both regulation loops may be potentiometers, using pre-zeroing as a reference for the value detected by the corresponding temperature sensor. The output ends of the first feedback processing circuit 81 and the second feedback processing circuit 83 are respectively connected to the input end of the judging circuit 85, and the output end of the judging circuit 85 is connected to the input end of the smoke barrier movement adjusting circuit 86 for controlling the motor 61 of the movement mechanism 6. The judgment circuit 85 is a logic circuit and functions as a circuit for performing logic operation.

Through the control circuit, the utility model discloses a range hood's control flow, including following step:

1) starting the range hood;

2) the first temperature sensor 71 detects the temperature in the corresponding side pan, and inputs the temperature into the first feedback processing circuit 81, and the first adjusting circuit 82 inputs the initial ambient temperature into the first feedback processing circuit 81, and outputs the feedback temperature T1 after zero setting; the second temperature sensor 72 detects the temperature in the corresponding side pan and inputs the temperature into the second feedback processing circuit 83, and the second regulating circuit 84 inputs the initial ambient temperature into the second feedback processing circuit 83, and outputs the feedback temperature T2 after zero setting;

3) the judgment and corresponding control are carried out according to the feedback temperature values of the first temperature sensor 71 and the second temperature sensor 72, and the second air inlet 43 is always kept in an open state:

3.1) when T1 is greater than 0 and T2 is 0, it indicates that only the left burner of the cooker is in a cooking state, only the left smoke barrier 5 is opened, and the right smoke barrier 5 is kept in a closed state, so as to ensure the wind speed of the left first air inlet 11;

3.2) when T1 is more than 0 and T2 is more than 0, the left and right cooking holes of the cooker are both in a cooking state, and the two smoke baffles 5 are both kept in an open state;

3.3) when T1 is equal to 0 and T2 is greater than 0, it indicates that only the right burner of the cooker is in a cooking state, only the right smoke barrier 5 is opened, and the left smoke barrier 5 is kept in a closed state, so as to ensure the wind speed of the right first air inlet 11;

3.4) when T1 is 0 and T2 is 0, both smoke baffles 5 remain closed, indicating that both the left and right cooktops of the cooktop are in the uncooked state.

Referring to fig. 4, during installation, the range hood can be integrally installed below the cabinet, and the range hood does not block the sight, has a large operation space and is good in cooking experience of users.

Due to the inclined design of the front side wall 13 and the first baffle plate 41 and the arrangement of the first filter screen 12 and the second filter screen 44, the grease in the shell 1 can be ensured to flow into the oil cup 3 downwards along the front side wall 13, the first baffle plate 41 and the two filter screens, the grease separation degree is improved, the excessive grease is prevented from being accumulated on the surface of the motor of the fan system 2, and the service life of the fan system 2 is prolonged.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion or/and be transported to the second portion, and may be directly communicated between the first portion and the second portion, or indirectly communicated between the first portion and the second portion via at least one third member, which may be a fluid passage such as a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber allowing the fluid to flow therethrough, or a combination thereof.

Claims

1. A range hood, includes casing (1), its characterized in that: first air intake (11) have been seted up respectively to the left and right sides of casing (1) lower part, and every first air intake (11) from top to bottom gradually from the side to middle slope, casing (1) upper portion front side is provided with air inlet subassembly (4), second air intake (43) have been seted up to the bottom of air inlet subassembly (4), second air intake (43) and casing (1) interior fluid intercommunication.

2. The range hood of claim 1, wherein: the side of casing (1) is provided with cigarette board (5) with the position that first air intake (11) correspond, cigarette board (5) can be opened or close first air intake (11).

3. The range hood of claim 2, wherein: the top end of the smoke baffle (5) is hinged with the shell (1), and the shell (1) is further provided with a moving mechanism (6) used for driving the smoke baffle (5) to overturn relative to the shell (1).

4. The range hood of claim 3, wherein: a first temperature sensor (71) and a second temperature sensor (72) are respectively arranged at the positions, close to the first air inlet (11), of the front side of the shell (1), the first temperature sensor (71) is arranged at the position, close to the bottom of the left side, of the shell (1), and the second temperature sensor (72) is arranged at the position, close to the bottom of the right side, of the shell (1); the range hood also comprises a control circuit for controlling the movement mechanism (6) according to the data detected by the first temperature sensor (71) and the second temperature sensor (72).

5. The range hood of claim 4, wherein: the control circuit comprises a first feedback processing circuit (81), a first adjusting loop (82), a second feedback processing circuit (83), a second adjusting loop (84), a judging circuit (85) and a smoke baffle movement adjusting circuit (86), one input end of the first feedback processing circuit (81) is connected with a first temperature sensor (71) serving as a first monitoring unit, the other input end of the first feedback processing circuit is connected with a first regulating loop (82), one input end of the second feedback processing circuit (83) is connected with a second temperature sensor (72) serving as a second monitoring unit, the other input end of the second feedback processing circuit is connected with a second regulating loop (84), the output ends of the first feedback processing circuit (81) and the second feedback processing circuit (83) are respectively connected with the input end of the judging circuit (85), the output end of the judging circuit (85) is connected with the input end of a smoke baffle movement adjusting circuit (86) used for controlling the movement mechanism (6).

6. The range hood according to any one of claims 1 to 5, wherein: the air inlet assembly (4) comprises a first baffle (41) and second baffles (42) located on the left side and the right side of the first baffle (41), the top of the first baffle (41) is fixedly connected with the shell (1), the first baffle (41) is gradually inclined forwards from top to bottom, the second baffles (42) are gradually increased from top to bottom, and second air inlets (43) are formed between the bottom of the first baffle (41) and the corresponding position of the shell (1).

7. The range hood according to any one of claims 1 to 5, wherein: a fan system (2) is arranged in the shell (1).

8. The range hood according to any one of claims 1 to 5, wherein: first air intake (11) department is provided with first filter screen (12), second air intake (43) department is provided with second filter screen (44).

9. The range hood according to any one of claims 1 to 5, wherein: an oil cup (3) is arranged at the position, between the two first air inlets (11), of the bottom of the shell (1).

10. The range hood of claim 9, wherein: the part that casing (1) is located between two first air intake (11) front sides constitutes preceding lateral wall (13) that from top to bottom inclines gradually backward, and the bottom of casing (1) is provided with diapire (14) by preceding to back slope gradually down, oil leak hole (141) have been seted up to diapire (14) rear end and the position that oil cup (3) correspond.