CN211372540U

CN211372540U - Fume exhaust fan

Info

Publication number: CN211372540U
Application number: CN201921926079.5U
Authority: CN
Inventors: 杨伟刚
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-08-28
Anticipated expiration: 2029-11-07

Abstract

The utility model discloses a range hood, including first main part (1) and second main part (2) of setting at first main part (1) rear portion, first air intake (11) have been seted up to the bottom of first main part (1), second air intake (21) have been seted up to the lower part of second main part (2), second air intake (21) are located the below of first air intake (11), its characterized in that: the second main body (2) is provided with an induction device (3) which is used for detecting the distance between the second main body and a cooker (101) below the range hood so as to control the second main body (2) to lift. Compared with the prior art, the utility model has the advantages of: can detect the height of pan for the second air intake can move to suitable height according to the pan of co-altitude not, realizes the best oil absorption cigarette effect.

Description

Fume exhaust fan

Technical Field

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

Background

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 are large in overall size and cannot be completely wrapped by the cabinet in normal work. The hiding effect and the aesthetic property are poor.

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 deficiency of the existing range hood, a range hood with top suction and side suction combination appears on the market, chinese utility model patent with application number 201320250895.5 discloses a top suction and side suction combination range hood, including falling L-shaped machine case, machine case top sets up the collection petticoat pipe, settle the fan of vertical setting in the collection petticoat pipe, the fan air intake link up with quick-witted case, the air outlet setting of fan switches on with the external world in collection petticoat pipe top, quick-witted incasement portion forms a vertical wind channel and a horizontal wind channel, vertical wind channel bottom is provided with first smoke inlet, be equivalent to side suction, horizontal wind channel bottom surface is provided with the second smoke inlet, be equivalent to top suction, machine bottom of the case portion is provided with the oil cup, be provided with the controller in horizontal wind channel or the vertical wind channel.

However, the height of the cookware is different during cooking, so that the height of the smoke source is different, and the first smoke inlet with a fixed position cannot suck away the oil smoke at a proper height in time, so that the oil smoke escapes, and the oil smoke sucking effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned prior art not enough, provide one kind and can adjust the height of side air intake according to the height of pan, prevent the oil smoke that leads to because of the improper position of air intake and escape, promote the range hood of oil absorption cigarette effect.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a range hood, includes first main part and sets up the second main part at first main part rear portion, first air intake has been seted up to the bottom of first main part, the second air intake has been seted up to the lower part of second main part, the second air intake is located the below of first air intake, its characterized in that: the second main body is provided with an induction device which is used for detecting the distance between the second main body and a cooker below the range hood so as to control the second main body to lift.

In order to monitor the height of the pot, the sensing device comprises a first distance measuring sensor and a second distance measuring sensor which are arranged at the bottom of the second main body along the left-right direction at intervals.

In order to filter oil smoke, a first oil net is arranged at a first air inlet of the first main body, and a second oil net is arranged at a second air inlet of the second main body.

In order to play the roles of guiding and gathering the smoke, the range hood also comprises a smoke guide plate correspondingly arranged at the first air inlet.

In order to improve the oil fume suction effect, the second air inlet is gradually inclined downwards from front to back.

Compared with the prior art, the utility model has the advantages of: the second main body is movably arranged in the longitudinal direction, so that the longitudinal movement of the second air inlet can be realized; through set up induction system on the second main part to can detect the height of pan, make the second air intake can move to suitable height according to the pan of co-altitude not, realize the best oil absorption cigarette effect to different culinary art states.

Drawings

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

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

fig. 3 is a schematic view of the range hood according to the embodiment of the present invention after the smoke guide plate is hidden;

FIG. 4 is a schematic view of the installation and use status of the range hood of the present invention;

fig. 5 is a schematic diagram of a second air inlet lifting control circuit of the range hood according to the embodiment of the present invention;

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

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 3, the range hood includes a first main body 1 and a second main body 2 disposed at the rear of the first main body 1, and the first main body 1 and the second main body 2 are communicated with each other. The bottom of the first main body 1 is provided with a first air inlet 11, the lower part of the second main body 2 is provided with a second air inlet 21, the second air inlet 21 is gradually inclined downwards from front to back, and the second air inlet 21 is positioned below the first air inlet 11.

Referring to fig. 1, a first oil screen 4 is disposed at a first air inlet 11 of a first body 1, and a second oil screen 5 is disposed at a second air inlet 21 of a second body 2. A smoke guide plate 6 is correspondingly arranged below the first air inlet 11.

Referring to fig. 2, the second body 2 is provided with a sensing device 3 for detecting a distance from the cooker under the range hood so as to control the second body 2 to ascend and descend, and the second air inlet 21 is lifted and descended by the sensing device 3. The sensing device 3 includes a first distance measuring sensor 31 and a second distance measuring sensor 32 spaced apart in the left-right direction at the bottom of the second body 2. The first distance measuring sensor 31 and the second distance measuring sensor 32 in the present embodiment are both infrared sensors. Other sensors, such as laser sensors, etc., are also possible.

Referring to fig. 4, when the range hood is used, the cooking bench 100 below the range hood is generally a double-hole kitchen range, two pots 101 can be placed on the cooking bench 100 at intervals from left to right, the first distance measuring sensor 31 corresponds to one pot 101, and the second distance measuring sensor 32 corresponds to the other pot 101. The first distance measuring sensor 31 or the second distance measuring sensor 32 detects that the vertical distance from the top surface of the pot 101 is H, and the distance from the top of the second air inlet 21 to the top surface of the cooking bench 100 is S.

Referring to fig. 5, the second body 2 is connected to the first body 1 through an electric lifting mechanism, and the range hood may further include a control circuit for controlling the second body 2 (the second air inlet 21) to lift, where the control circuit includes a monitoring circuit, an adjusting circuit, a feedback processing circuit, a judging circuit, and a lifting mechanism adjusting circuit. The monitoring circuit comprises a first monitoring unit and a second monitoring unit, the regulation loop comprises a first regulation loop 71 and a second regulation loop 72, and the feedback circuit comprises a first feedback processing circuit 73 and a second feedback processing circuit 74. The first and

second regulation circuits

71 and 72 may be potentiometers (zero-setting circuits), respectively, using pre-zero as a reference for the first and second ranging

sensors

31 and 32. The first feedback processing circuit 73 and the second feedback processing circuit 74 may be amplification circuits, respectively. In this embodiment, the first monitoring unit and the second monitoring unit are a first distance measuring sensor 31 and a second distance measuring sensor 32, respectively. The first distance measuring sensor 31 and the first regulating loop 71 are respectively connected to the input of a first feedback circuit 73, and the second distance measuring sensor 32 and the second regulating loop 72 are respectively connected to the input of a second feedback processing circuit 74. The output terminal of the first feedback processing circuit 73 and the output terminal of the second feedback processing circuit 74 are connected to a determination circuit 75 (comparison circuit), respectively. The judgment circuit 75 is connected to the elevating mechanism adjusting circuit 76, and controls the elevating mechanism of the second body 2, thereby adjusting the height of the second air inlet 21 of the second body 2. The first adjustment circuit 71, the second adjustment circuit 72, the first feedback processing circuit 73, the second feedback processing circuit 74, the judgment circuit 75, and the lift mechanism adjustment circuit 76 constitute a main control unit.

By adopting the control circuit, the lifting control flow of the second main body 2 of the range hood is shown in fig. 6, and the control circuit comprises the following steps:

1) cooking is started, and the range hood starts to work;

2) the first distance measuring sensor 31 and the second distance measuring sensor 32 emit infrared rays to detect the distance between the cooker 101 and the cooker, the height of the initial value detected by the first distance measuring sensor 31 is H1 fed back to the judging circuit 75 by the first feedback processing circuit 73 after being zeroed by the first adjusting circuit 71, and the height of the initial value detected by the second distance measuring sensor 32 is H2 fed back to the judging circuit 75 by the second feedback processing circuit 74 after being zeroed by the second adjusting circuit 72;

3) judging the sizes of H1, H2 and Hm, wherein Hm is a preset value for controlling the lifting height of the second air inlet 21, and preferably, Hm is 160 mm; when H1 is more than or equal to Hm and H2 is more than or equal to Hm, entering the step 4); when H1 < Hm or H2 < Hm, entering step 5);

4) the judgment circuit 75 controls the second air inlet 21 to descend through the lifting mechanism adjusting circuit 76, and preferably, S is 480 mm.

5) The judgment circuit 75 controls the second air inlet 21 to descend through the lifting mechanism adjusting circuit 76, and preferably, S is 580 mm.

The utility model discloses make full use of hangs down the advantage of inhaling, side suction and top lampblack absorber, the air intake that the type of falling L arranged all has better oil absorption cigarette effect under little oil smoke volume, big oil smoke volume culinary art state, and the second air intake 21 that is located the below guarantees the suction of most oil smoke, and the oil smoke easily receives the disturbance production and escapes under the air flow or moves the pot condition, and the first air intake 11 that is located the top has guaranteed the suction of escaping the oil smoke under this kind of circumstances. And the sensing device 3 controls the longitudinal adjustment of the second air inlet 21 according to the cookware with different heights, so as to achieve the optimal oil smoke absorption height, prevent the oil smoke from escaping and improve the oil smoke absorption effect.

The utility model discloses a set up the infrared (ultrasonic wave) sensor of range finding and judge the culinary art state in kitchen, judge whether the user cooks and then opens and shuts through program control by oneself, realize under the different culinary art states, correspond opening and shutting of range hood air intake, guarantee the negative pressure zone and the effective amount of wind of every air intake, the reinforcing oil absorption cigarette effect.

Claims

1. The utility model provides a range hood, includes first main part (1) and sets up second main part (2) at first main part (1) rear portion, first air intake (11) have been seted up to the bottom of first main part (1), second air intake (21) have been seted up to the lower part of second main part (2), second air intake (21) are located the below of first air intake (11), its characterized in that: the second main body (2) is provided with an induction device (3) which is used for detecting the distance between the second main body and a cooker (101) below the range hood so as to control the second main body (2) to lift.

2. The range hood of claim 1, wherein: the induction device (3) comprises a first distance measuring sensor (31) and a second distance measuring sensor (32) which are arranged at the bottom of the second main body (2) at intervals along the left-right direction.

3. The range hood of claim 1 or 2, wherein: a first oil screen (4) is arranged at a first air inlet (11) of the first main body (1), and a second oil screen (5) is arranged at a second air inlet (21) of the second main body (2).

4. The range hood of claim 3, wherein: the smoke guide plate is correspondingly arranged at the first air inlet (11).

5. The range hood of claim 1 or 2, wherein: the second air inlet (21) is gradually inclined downwards from front to back.