CN116085844A

CN116085844A - Telescopic air curtain assembly and range hood with same

Info

Publication number: CN116085844A
Application number: CN202310218054.4A
Authority: CN
Inventors: 任勇; 李注佳
Original assignee: Guangdong Chengyi Technology Co ltd
Current assignee: Guangdong Chengyi Technology Co ltd
Priority date: 2023-03-08
Filing date: 2023-03-08
Publication date: 2023-05-09

Abstract

The invention discloses a telescopic air curtain component and a range hood with the same, wherein the telescopic air curtain component comprises: the telescopic main body comprises a hidden panel, and an air curtain exhaust outlet facing downwards is arranged on the hidden panel; the air curtain component is arranged on the telescopic main body; the driving mechanism drives the telescopic main body to move back and forth, so that the telescopic main body has a working state and a hiding state, and in the working state, the hiding panel moves out of the panel of the range hood, and the air curtain assembly operates; in the hidden state, the hidden panel is positioned in a smoke panel of the smoke exhaust ventilator; compared with the prior art, the telescopic air curtain component has the advantages that when the telescopic main body is in a working state, the hidden panel extends out of the smoke ventilator panel of the smoke ventilator, the air curtain component passes through the air curtain air outlet to form an air curtain and blocks polluted air from escaping, and when the telescopic main body is in the hidden state, the hidden panel is positioned in the smoke ventilator panel of the smoke ventilator, so that occupation of kitchen space can be reduced.

Description

Telescopic air curtain assembly and range hood with same

Technical Field

The invention relates to the technical field of kitchen appliances, in particular to a telescopic air curtain assembly and a range hood with the same.

Background

The fume exhauster is one kitchen appliance for purifying kitchen environment, and has the functions of exhausting fume produced during the burning of kitchen range and cooking process, reducing pollution, purifying air, etc. When the range hood works, air flow formed by oil smoke flows to the air suction inlet on the panel of the range hood under the action of the smoke exhaust fan, and in the flowing process of the air flow formed by the oil smoke, polluted air on the surface of the air flow can escape outwards and is sucked by a user, so that the health of the user is influenced. In order to prevent the escaped polluted air from being inhaled by a user, the existing range hood is provided with an air curtain assembly which blows downwards and forms an air curtain, and the air curtain can prevent the polluted air from escaping outwards. In this range hood, since the air supply formed by the air curtain assembly is located between the user and the suction inlet of the range hood, the top of the housing of the range hood needs to be provided with a portion extending toward the user, and the air curtain assembly is disposed at the portion. The range hood has the advantages that the position of the air curtain assembly does not change when the range hood is started or closed, and the part where the air curtain assembly is installed extends out of the shell and faces the user. In some small-sized kitchens, the range hood is arranged, and the occupied area of the range hood to the kitchen space is relatively large.

Disclosure of Invention

The invention aims to provide a telescopic air curtain assembly and a range hood with the same, which are used for solving the technical problems.

A telescoping air curtain assembly for a range hood, comprising:

the telescopic main body comprises a hidden panel, and an air curtain exhaust outlet facing downwards is arranged on the hidden panel;

the air curtain component is arranged on the telescopic main body;

the driving mechanism drives the telescopic main body to move back and forth, so that the telescopic main body has a working state and a hiding state, and in the working state, the hiding panel moves out of the panel of the range hood, and the air curtain assembly operates; in the hidden state, the hidden panel is positioned in the range hood panel of the range hood.

According to one embodiment of the present invention, the air curtain exhaust port is elongated and extends along the left-right direction of the hidden panel, and the air curtain formed by the air curtain exhaust port is parallel to at least one side of the air suction port of the range hood.

According to an embodiment of the present invention, the telescopic main body further includes a front panel and a hidden top plate, the hidden panel, the front panel and the hidden top plate enclose a receiving cavity together, and the front panel is provided with a touch key for controlling the driving mechanism to drive the telescopic main body to switch between a hidden state and a working state.

According to an embodiment of the invention, the hidden roof is provided with ventilation holes, in the state of the telescopic body in which the hidden roof is in the roof of the range hood, in the state of the telescopic body in which the hidden roof is in operation, the hidden roof protrudes out of the roof of the range hood, and the air intake ventilation holes are sucked in by the air curtain assembly.

According to one embodiment of the invention, the driving mechanism comprises a driving motor, a push rod and a guiding structure, wherein the driving end of the driving motor is connected to the push rod to realize that the push rod drives the telescopic main body to push and pull reciprocally, the guiding structure is arranged in the accommodating cavity, and the guiding structure comprises a guiding piece fixed in the accommodating cavity and a guiding rail sliding along the guiding piece; or the guide structure comprises a guide rail fixed in the accommodating cavity and a guide piece sliding along the guide rail.

The range hood comprises the telescopic air curtain assembly and further comprises a hood panel, wherein the hood panel is provided with an air suction opening extending in the left-right direction, and air exhausted by the air curtain air outlet is sucked by the air suction opening and enters a smoke exhaust channel of the range hood.

According to one embodiment of the invention, the air suction port is a long and narrow air suction port, the left side and the right side of the panel of the smoke machine are provided with the wind shields, and the air curtain exhaust port can move back and forth relative to the air suction port when the telescopic main body is driven by the driving mechanism to move.

According to one embodiment of the invention, the air curtain assembly comprises a cross flow wind wheel, an air curtain motor for driving the cross flow wind wheel and a volute for forming vertical air guide at the air outlet side, wherein the air guiding end of the volute is close to one side of the air curtain air outlet, the air curtain air outlet is divided into a plurality of slender strip-shaped air inlets, and the plurality of slender strip-shaped air inlets are arranged in 2-3 rows.

According to an embodiment of the invention, the air quality detection device is further arranged outside a space surrounded by the air curtain formed by the air curtain component, the smoke ventilator panel and the wind shielding plate, and the power of the smoke ventilator and the air curtain component of the smoke ventilator is controlled by detecting pollution.

According to one embodiment of the invention, when the telescopic main body is in a working state, the air curtain air outlet has an initial position and a limit position, and the air curtain air outlet varies between the initial position and the limit position according to the detection value of the air quality detection device.

Compared with the prior art, the telescopic air curtain assembly has the following advantages:

according to the telescopic air curtain assembly, when the telescopic main body is in a working state, the hidden panel extends out of the smoke panel of the smoke exhaust ventilator, the air curtain assembly passes through the air curtain air outlet to form the air curtain and prevent polluted air from escaping, and when the telescopic main body is in a hidden state, the hidden panel is positioned in the smoke panel of the smoke exhaust ventilator, so that occupation of kitchen space can be reduced.

Drawings

FIG. 1 is a schematic view of a telescopic air curtain assembly according to the present invention;

FIG. 2 is a schematic view of a structure of a curtain assembly of the telescoping curtain assembly of the present invention;

FIG. 3 is a cross-sectional view of an air curtain assembly of the telescoping air curtain assembly of the present invention;

FIG. 4 is a schematic illustration of a range hood having a telescoping air curtain assembly of the present invention with the hood closed;

fig. 5 is a schematic illustration of a range hood having an air curtain assembly of the telescoping air curtain assembly of the present invention when activated;

fig. 6 is a schematic view of a range hood having a curtain assembly of the telescopic air curtain assembly of the present invention;

fig. 7 is a bottom view of the extractor hood of the air curtain assembly of the telescoping air curtain assembly of the present invention;

in the figure: 1. the telescopic main body, 11, the hidden panel, 111, the air curtain exhaust outlet, 112, the lighting window, 12, the front panel, 2, the air curtain assembly, 21, the cross flow wind wheel, 22, the air curtain motor, 23, the volute, 231, the induced air end, 24, the volute tongue, 3, the driving mechanism, 31, the driving motor, 32, the push rod, 33, the guide piece, 34, the guide rail, 4, the smoke machine panel, 41, the air suction inlet, 5, the wind shield and 6, the lighting device

The implementation and advantages of the functions of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

Various embodiments of the invention are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the invention. That is, in some embodiments of the invention, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indicators (such as up, down, left and right, front and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the invention solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

For a further understanding of the nature, features, and efficacy of the present invention, the following examples are set forth in order to provide a further understanding of the invention, and are intended to be described in connection with the accompanying drawings:

referring to fig. 1, 2, 6 and 7, the invention discloses a telescopic air curtain assembly, which is used for a range hood, and comprises a telescopic main body 1, an air curtain assembly 2 and a driving mechanism 3, wherein the telescopic main body 1 comprises a hidden panel 11, and an air curtain exhaust outlet 111 facing downwards is arranged on the hidden panel 11; the air curtain component 2 is arranged on the telescopic main body 1; the driving mechanism 3 drives the telescopic main body 1 to move back and forth, so that the telescopic main body 1 has a working state and a hiding state, and in the working state, the hiding panel 11 moves out of a smoke panel of the range hood, and the air curtain assembly 2 operates; in the hidden state, the hidden panel 11 is in the hood panel of the range hood. According to the telescopic air curtain assembly, the hidden panel 11 is positioned on the lower surface of the telescopic main body 1, when the telescopic main body 1 is in a hidden state, the hidden panel 11 cannot be seen by a user, and when the telescopic main body 1 is in a working state, the hidden panel can be seen by the user; after being applied to the range hood, the hidden panel 11 is hidden in the range hood panel of the range hood when the telescopic main body 1 is in a hidden state, and the hidden panel 11 extends out of the range hood panel of the range hood when the telescopic main body 1 is in a working state; when the range hood is started, the driving mechanism 3 is started and switches the telescopic main body 1 to a working state, the hidden panel 11 stretches out of the range hood panel of the range hood and moves to the outer side of the range hood panel of the range hood, the downward-oriented air curtain exhaust port 111 on the hidden panel 11 is positioned between the air suction port of the range hood and a user, the air curtain assembly 2 is started and exhausts downwards through the air curtain exhaust port 111 to form an air curtain positioned between the air suction port of the range hood and the user, when the smoke exhaust fan of the range hood is started, air flow formed by cooking fume generated by the user starts to flow to the air suction port of the range hood, in the process of flowing to the air suction port of the range hood, the polluted air on the air flow surface can outwards escape, the escaped polluted air can be blocked by the air curtain, the escaped polluted air cannot pass through the air curtain to continue to outwards diffuse, the escaped polluted air sucked by the user can be avoided, and the air quality of a kitchen space is ensured. After the user finishes the cooking operation, the smoke exhaust fan of the range hood is closed, the air curtain component 2 is closed, the driving mechanism 3 is started and switches the telescopic main body 1 from the working state to the hiding state, the hiding panel 11 starts to move into the panel of the range hood, and the telescopic main body 1 is positioned in the panel of the range hood when being switched to the hiding state. According to the telescopic air curtain assembly, when the telescopic main body 1 is in a working state, the hidden panel 11 extends out of the smoke panel of the smoke exhaust ventilator, the air curtain assembly 2 passes through the air curtain air outlet 111 to form an air curtain and prevent polluted air from escaping, and when the telescopic main body 1 is in a hidden state, the hidden panel 11 is positioned in the smoke panel of the smoke exhaust ventilator, so that occupation of kitchen space can be reduced.

Referring to fig. 7, in the telescopic air curtain assembly of the present invention, the air curtain exhaust opening 111 is elongated, extends along the left and right directions of the hidden panel 11, and forms an air curtain parallel to at least one side of the air intake opening of the range hood. The left-right direction of the hidden panel 11 is the direction from the left side to the right side of the range hood when the telescopic air curtain assembly is applied to the range hood, the direction is also the width direction of the hood panel of the range hood, the width direction of the hidden panel 11 is also the width direction of the air curtain exhaust port 111, when the air curtain assembly 2 is started, the air curtain assembly 2 supplies air through the air curtain exhaust port 111, the formed air curtain is also unfolded along the width direction of the hidden panel 11, the air curtain is parallel to at least one side of the air suction port of the range hood, the air speed and the air pressure from the center line of the air suction port of the range hood to the position of the distance above the air curtain are the same, the air curtain is stable in blocking effect on escaping polluted air, the air curtain is also stable on the air outside the air curtain flowing to the air suction port of the range hood through the air curtain, when a user performs cooking operation, the generated cooking fume can form good air flow when flowing to the air suction port of the range hood, and the formed air flow can not diffuse to the air suction port of the range hood, and when the user cannot perform the cooking operation, the air can be prevented from being polluted, and the user can be prevented from having a healthy and the air-purifying effect when the user is operating the air.

Referring to fig. 1 and 6, in the telescopic air curtain assembly of the present invention, the telescopic main body 1 further includes a front panel 12 and a hidden top plate (not labeled in the drawing), the hidden panel 11, the front panel 12 and the hidden top plate jointly enclose a receiving cavity, the front panel 12 is provided with a touch button, and the touch button is used for controlling the driving mechanism 3 to drive the telescopic main body 1 to switch between a hidden state and a working state. The front panel 12 is a surface of the telescopic main body 1 facing the user, the hidden top plate is a surface of the telescopic main body 1 opposite to the hidden panel 11, the telescopic main body 1 can be seen by the user when the hidden main body is in a hidden state or a working state, and the air curtain assembly 2 is arranged in the hidden panel 11, the front panel 12 and the hidden top plate to jointly enclose a containing cavity. The front panel 12 faces the user and can be always seen by the user, the touch control keys on the front panel are also always seen by the user, the touch control keys are arranged on the front panel 12 to facilitate the user to operate and switch the state of the telescopic main body 1, the touch control keys are used for controlling the driving mechanism 3, when the telescopic main body 1 is in a hidden state, the user can start the driving mechanism 3 through the touch control keys, so that the driving mechanism 3 can switch the telescopic main body 1 from the hidden state to the working state, the driving mechanism 3 drives the telescopic main body 1 to move outside the range hood panel of the range hood, and the hidden panel 11 is moved outside the range hood panel of the range hood; when the telescopic main body 1 is in a working state, a user can start the driving mechanism 3 through the touch key, so that the driving mechanism 3 switches the telescopic main body 1 from the working state to the hiding state, the driving mechanism 3 drives the telescopic main body 1 to move into a range hood panel of the range hood, and the hiding panel 11 is positioned in the range hood panel of the range hood. In addition, since the air curtain air outlet 111 is disposed on the hidden panel 11, the front panel 12 is disposed at the outer side of the air curtain air outlet 111, that is, the air curtain formed by exhausting air through the air curtain air outlet 111 by the air curtain assembly 2 blocks the polluted air from escaping to the air curtain outer space where the front panel 12 is disposed, so that the oil dirt in the polluted air can be prevented from adhering to the front panel 12, and the sensitivity of the touch keys on the front panel 12 is prevented from being influenced, and the user operation is prevented from being influenced.

According to the telescopic air curtain assembly, the hidden top plate is provided with the ventilation holes, when the telescopic main body 1 is in the hidden state, the hidden top plate is positioned in the top plate of the range hood, when the telescopic main body 1 is in the working state, the hidden top plate extends out of the top plate of the range hood, and air enters the ventilation holes to be sucked by the air curtain assembly 2. When the telescopic main body 1 is in a hidden state, the hidden top plate is hidden in the top plate of the range hood, the vent hole on the hidden top plate is hidden in the top plate of the range hood, the hidden panel 11 is hidden in the range hood panel of the range hood, and the air curtain exhaust outlet 111 on the hidden panel 11 is hidden in the range hood panel of the range hood; when a user starts the driving mechanism 3 through the touch key, the driving mechanism 3 drives the telescopic main body 1 to move forwards, the telescopic main body 1 is switched to a working state, the hidden top plate of the telescopic main body 1 starts to move out of the top plate of the range hood, the hidden panel 11 of the telescopic main body 1 starts to move out of the range hood panel of the range hood, in the process that the telescopic main body 1 is switched from the hidden state to the working state, the vent hole on the hidden top plate starts to move out of the top plate of the range hood, the air curtain air outlet 111 on the hidden panel 11 starts to move out of the range hood panel of the range hood, after the telescopic main body 1 is switched to the working state, the hidden panel 11 moves out of the range hood panel of the range hood, the hidden top plate moves out of the top plate of the range hood, the vent hole moves out of the top plate of the range hood, when the air curtain assembly 2 is started, air enters the accommodating cavity through the vent hole on the hidden top plate, is sucked by the air curtain assembly 2, and the sucked air is discharged through the air curtain air outlet 111 to form an air curtain.

Referring to fig. 1, the driving mechanism 3 of the telescopic air curtain assembly of the present invention includes a driving motor 31, a push rod 32, and a guiding structure, wherein the driving end of the driving motor 31 is connected to the push rod 32 to realize that the push rod 32 drives the telescopic main body 1 to push and pull reciprocally, the guiding structure is disposed in the accommodating cavity, and the guiding structure includes a guiding member 33 fixed in the accommodating cavity and a guiding rail 34 sliding along the guiding member 33. The guide piece 33 of the guide structure is fixed in the accommodating cavity, the guide rails 34 of the guide structure are connected to the telescopic main body 1, when a user starts the driving mechanism 3 through the touch key, the driving motor 31 starts and drives the push rod 32 to move forwards or backwards, the push rod drives the telescopic main body 1 to move forwards or backwards, the telescopic main body 1 is switched to the working state from the hidden state or is switched to the hidden state from the working state, and in the process that the push rod 32 drives the telescopic main body 1 to move, the guide rails 34 connected with the telescopic main body 1 slide relative to the guide piece 33, so that the movement of the telescopic main body 1 is linear, the occurrence of cheapness of the telescopic main body 1 is avoided, and the moving process is blocked. As shown in the figure, the left and right sides of the telescopic main body 1 are both connected with guide rails 34, both sides of the accommodating cavity are provided with guide members 33, the guide rails 34 are in sliding connection with the guide members 33, when the telescopic main body 1 is in a hidden state, after a user starts the driving mechanism 3 through a touch key, the driving motor 31 is started, the push rod 32 is enabled to push the telescopic main body 1 outwards, the telescopic main body 1 starts to move outwards, the hidden panel 11 starts to move out of the range hood panel of the range hood, the hidden top panel starts to move out of the top plate of the range hood, the telescopic main body 1 drives the guide rails 34 to move outwards, and the guide rails 34 slide along the guide members 33 until the telescopic main body 1 is switched to a working state; when the telescopic main body 1 is in a working state, after the user starts the driving mechanism 3 through the touch key, the driving motor 31 is started, the push rod 32 is enabled to pull the telescopic main body 1 inwards, the telescopic main body 1 starts to move inwards, the hidden panel 11 starts to move inwards towards the inner east of the panel of the range hood, the hidden top plate starts to move inwards towards the top plate of the range hood, the telescopic main body 1 drives the guide rail 34 to move inwards, and the guide rail 34 slides along the guide piece 33 until the telescopic main body 1 is switched to the hidden state. There are various ways in which the driving motor 31 converts the rotation of its output end into the forward and backward movement of the push rod 32, for example, the output end of the driving motor 31 is connected with a screw rod, a screw rod blanking is connected to the screw rod, the push rod 32 is connected with a screw rod nut, when the driving motor 31 is started, the screw rod rotates, the screw rod nut slides along the screw rod, the screw rod nut drives the push rod 32 to move forward or backward, and the moving direction of the push rod 32 can be changed by changing the rotating direction of the driving motor 31. The manner in which the drive motor 31 converts the rotation of its output into the forward and backward movement of the push rod 32 can also be operated as follows: the output end of the driving motor 31 is connected with an output gear, the push rod 32 is connected with a rack, the gear is meshed with the rack, when the driving motor 31 is started, the gear rotates along with the output end of the driving motor 31 and rolls on the rack, so that the rack drives the push rod 32 to move back and forth, the moving direction of the push rod 32 can be changed still by changing the rotating direction of the driving motor 31.

In addition, the connection object of the guide 33 and the guide rail 34 of the guide structure can be flexibly adjusted. In other embodiments, the guide structure includes a rail 34 fixed in the receiving cavity and a guide 33 sliding along the rail 34. That is to say, the guide rail 34 is fixed in the accommodating cavity, the guide member 33 is connected with the telescopic body 1, when the driving motor 31 drives the telescopic body 1 to move back and forth through the push rod 32, the guide member 33 moves along with the telescopic body 1, and in the moving process, the guide member 33 slides along the guide rail 34, so that the telescopic body 1 can move stably, and the moving direction of the telescopic body 1 can be limited, so that the moving linearity of the telescopic body 1 is ensured.

Referring to fig. 4 to 7, the invention also discloses a range hood, which comprises the telescopic air curtain assembly and further comprises a hood panel 4, wherein the hood panel 4 is provided with an air suction opening 41 extending in the left-right direction, and air discharged by the air curtain air outlet 111 is sucked by the air suction opening 41 and enters a smoke exhaust channel of the range hood. According to the range hood, due to the fact that the telescopic air curtain assembly is arranged, in the shutdown state of the range hood, the telescopic main body 1 of the telescopic air curtain assembly is in the hidden state, the hidden panel 11 is arranged in the range hood panel 4, when the range hood works, a user starts the driving mechanism 3 through the touch key, the driving mechanism 3 pushes the telescopic main body 1 to move forwards and stretch out towards the user, when the telescopic main body 1 is switched to the working state, a smoke exhaust fan of the range hood is started, the air curtain assembly 2 of the telescopic air curtain assembly is started, the smoke exhaust fan forms negative pressure at the air suction surface 41, air flow formed by cooking fume of the user starts to flow to the air suction surface 41 under the negative pressure effect at the air suction surface 41, under the effect of the air curtain assembly 2, negative pressure is formed in the accommodating cavity, air above the hidden top plate starts to flow to the accommodating cavity through the vent, the air in the accommodating cavity is sucked through the air curtain exhaust opening 111 on the hidden panel 11 downwards to form an air curtain, in the process that the formed air flow to the air suction surface flows to the air suction surface 41, the air curtain is polluted in the air curtain is sucked to the air curtain exhaust opening, the air curtain is prevented from being polluted outside the air curtain surface, and the air curtain 12 can be prevented from being sucked to the air curtain surface to be escaped from the front side, and the air curtain 12 can be prevented from being escaped from being polluted in the front by the air curtain panel; meanwhile, as the air suction opening 41 is a negative pressure area, air discharged by the air curtain air outlet 111 is sucked into the negative pressure area at the air suction opening 41, then sucked by the air suction opening 41 and enters a smoke exhaust channel of the range hood through the air suction opening 41, in the process that the air discharged by the air curtain air outlet 111 flows towards the air suction opening 41, the polluted air escaping to the air curtain can flow towards the air suction opening 41 along with the air discharged by the air curtain air outlet 111 under the wrapping of the air discharged by the air curtain air outlet 111, so that the escaped polluted air enters the smoke exhaust channel again through the air suction opening 41 and is discharged, and the purifying effect of the range hood on the air in a kitchen space is ensured. After the purification of the air in the kitchen space is completed, a user can start the driving mechanism 3 through the touch key, so that the driving mechanism 3 drives the telescopic main body 1 to switch to the hidden state, the telescopic main body 1 starts to move backwards relative to the user, the hidden panel 11 is opened to move into the panel 4 of the range hood, the hidden top plate starts to move into the top plate of the range hood, the air curtain air outlet 111 and the ventilation hole also start to be hidden until the telescopic main body 1 is switched to the hidden state, and the driving mechanism 3 stops running. The range hood is provided with the telescopic air curtain component, the air curtain is formed when the range hood is started, and the polluted air on the airflow surface formed by the oil smoke is prevented from escaping outwards, so that a healthy kitchen environment is provided for a user.

Referring to fig. 7, in the range hood of the present invention, the air suction opening 41 is a long and narrow air suction opening, the left and right sides of the panel 4 of the range hood are provided with air shields 5, and the air curtain air outlet 111 can move back and forth relative to the air suction opening 41 when the telescopic body 1 is driven by the driving mechanism 3 to move. The smaller the effective ventilation area of the air suction port 41 is, the larger the negative pressure formed at the air suction port 41 by the smoke exhaust fan is under the condition that the power of the smoke exhaust fan is the same, and the larger the air suction speed at the air suction port 41 is; similarly, the larger the effective ventilation area of the air suction inlet 41, the smaller the negative pressure formed at the air suction inlet 41 by the smoke exhaust fan under the condition that the power of the smoke exhaust fan is the same, the smaller the air suction speed at the air suction inlet 41; according to the range hood disclosed by the invention, the air suction opening 41 is arranged as the narrow and long air suction opening arranged along the width direction of the panel 4 of the range hood, so that the effective ventilation area at the air suction opening 41 is smaller, the smoke exhaust fan operates with smaller power, larger negative pressure can be formed at the air suction opening 41, the energy consumption of the range hood can be saved, and the generated noise is relatively smaller when the smoke exhaust fan operates with lower power, so that the comfort level of a user can be improved. The telescopic main body 1 with the telescopic air curtain component is in a hidden state when the range hood is shut down, and extends out of the range hood when the range hood is started, so that the telescopic main body 1 moves back and forth relative to the air suction port 41 in the process that the driving mechanism 3 drives the telescopic main body 1 to switch between the hidden state and the working state, the air curtain air outlet 111 is arranged on the hidden panel 11, and the air curtain air outlet 111 moves back and forth relative to the air suction port 41 in the process that the hidden panel 11 moves along with the telescopic main body 1. The distance from the air curtain air outlet 111 to the smoke panel 4 is different, and the air curtain formed by downward air exhaust of the air curtain assembly 2 through the air curtain air outlet 111 is different from the area surrounded by the smoke panel 4 and the wind shields 5 on the left side and the right side of the smoke panel 4. When the range hood is started, the smoke exhaust fan forms negative pressure at the air suction inlet 41, the air suction inlet 41 sucks air in an area surrounded by the air curtain, the range hood panel 4 and the wind shields 5 on the left side and the right side of the range hood panel 4, the air outside the wind shields 5 on the left side and the right side can flow to the area through a gap between the wind shields 5 and the air curtain, and the inward flowing air flow can also prevent the air on the air flow surface formed by the oil smoke from escaping outwards through the gap between the wind shields 5 and the air curtain. The larger the distance from the air curtain exhaust port 111 to the hood panel 4, the larger the gap between the air curtain and the left and right wind shields 5, the smaller the flow velocity of the air flow flowing in at the gap between the air curtain and the left and right wind shields 5, the smaller the distance from the air curtain exhaust port 111 to the hood panel 4, the smaller the gap between the air curtain and the left and right wind shields 5, and the larger the flow velocity of the air flow flowing in at the gap between the air curtain and the left and right wind shields 5. The air curtain exhaust outlet 111 can move back and forth relative to the air suction opening 41, so that the gap between the air curtain and the wind shields 5 on the left and right sides can be adjusted in the process that the telescopic main body 1 moves back and forth relative to the user, the user can adjust the position of the air curtain exhaust outlet 111 according to the oil smoke generated during cooking, and the oil smoke in the area surrounded by the air curtain, the smoke machine panel 4 and the wind shields 5 on the left and right sides of the smoke machine panel 4 cannot escape outwards.

Referring to fig. 2 and 3, the air curtain assembly 2 of the range hood of the present invention includes a cross-flow wind wheel 21, an air curtain motor 22 driving the cross-flow wind wheel 21, and a volute 23 forming a vertical air guide at the air outlet side, wherein an air introducing end 231 of the volute 23 is close to one side of the air curtain air outlet 111, the air curtain air outlet 111 is divided into a plurality of elongated strip-shaped air outlets, and the plurality of elongated strip-shaped air outlets are arranged in 2-3 rows. The cross wind wheel 21 is arranged along the length direction of the air curtain air outlet 111, when the air curtain motor 22 is started, the cross wind wheel 21 is started by the air curtain motor 22 and rotates, air entering the accommodating cavity through the vent hole on the hidden top plate enters the air inlet side of the cross wind wheel 21 under the action of the cross wind wheel 21, then flows towards the air outlet side of the cross wind wheel 21, is guided by the volute 23 and flows towards the air introducing end 231 of the volute 23 when flowing out of the air outlet side of the cross wind wheel 21, then flows towards the air curtain air outlet 111 through the air introducing end 231 of the volute 23, and finally is discharged through a plurality of slender strip-shaped air inlets forming the air curtain air outlet 111. In the range hood, the cross-flow wind wheel 21 is arranged to extend along the left-right direction of the hidden panel 11, and the plurality of slender strip-shaped air inlets forming the air curtain air outlet 111 are also arranged to extend along the left-right direction of the hidden panel 11, so that when air flow is stirred by the cross-flow wind wheel 21 and is discharged to the air curtain air outlet 111, the air outlet quantity of each slender strip-shaped air inlet is the same, the formed air curtain is relatively stable, and the polluted air can be effectively prevented from escaping outwards through the air curtain. In addition, when the power of the cross flow wind wheel 21 is fixed, the larger the effective air outlet area of the air curtain air outlet 111 is, the smaller the air pressure at each elongated strip-shaped air port is, and the smaller the flow velocity of the air flow discharged through the elongated strip-shaped air port is; the smaller the effective air outlet area of the air curtain air outlet 111, the greater the air pressure at each elongated strip-shaped air outlet, and the greater the flow rate of the air flow discharged through the elongated strip-shaped air outlet; the better the air curtain formed by the air flow discharged through the air curtain outlet 111 is the blocking effect of the escaped polluted air. The air curtain air outlet 111 of the air curtain assembly 2 is formed by arranging 2-3 rows of elongated strip-shaped air openings along the left-right direction of the hidden panel 11, and intervals exist between the elongated strip-shaped air openings in the same row and between the elongated strip-shaped air openings in adjacent rows, so that the effective air exhaust area of the air curtain air outlet 111 can be reduced, the air pressure and the air exhaust speed at the elongated strip-shaped air openings are improved, and the air curtain formed by air flow exhausted through the elongated strip-shaped air openings can better block escaping polluted air.

In order to enable the air curtain formed by the air flow discharged through the elongated strip-shaped air openings to have continuity, the elongated strip-shaped air openings of two adjacent rows are arranged in a staggered mode, namely, the interval between the two adjacent elongated strip-shaped air openings of the first row is aligned with one elongated strip-shaped air opening of the second row, the interval between the two adjacent elongated strip-shaped air openings of the second row is aligned with one elongated strip-shaped air opening of the third row, and so on, the air flow discharged through the plurality of rows of elongated strip-shaped air openings has continuity in the left-right direction of the hidden panel 11, and the escape of polluted air can be effectively blocked.

When the power of the cross-flow wind wheel 21 is fixed, the smaller the effective area of the air curtain air outlet 111 is, the larger the wind pressure at the air curtain air outlet 111 is, the larger the flow velocity of the air flow discharged through the air curtain air outlet 111 is, the stronger the formed air curtain stability is, and the better the blocking effect on the escaped polluted air is. In addition, when the effective exhaust area of the air curtain exhaust port 111 is fixed, the smaller the width of the air curtain exhaust port 111 is, the larger the length is, and the greater the wind pressure at the air curtain exhaust port 111 is. On this basis, since the effective air outlet area of the air curtain air outlet 111 is composed of the areas of a plurality of elongated strip-shaped air inlets arranged in a plurality of rows, in order to increase the air outlet speed of the air curtain air outlet 111, the length of the elongated strip-shaped air inlet is far greater than the width of the elongated strip-shaped air inlet, the ratio of the width to the length of the elongated strip-shaped air inlet is too large, that is, the length of the elongated strip-shaped air inlet is not far greater than the width of the elongated strip-shaped air inlet, and when the width from the left side to the right side of the hidden panel 11 is definite, the number of rows of the elongated strip-shaped air inlets which can be formed on the hidden panel 11 is relatively small, and the air outlet speed of the elongated strip-shaped air inlet cannot be increased; however, if the ratio of the width to the length of the elongated slot is too small, that is, the length of the elongated slot is much longer than the width of the elongated slot, the same row needs to be composed of a plurality of elongated slots, and each elongated slot is spaced, which increases the weight and material cost of the hidden panel 11, and in addition, too many gaps between the air curtains of each layer affect the stability of the air curtain finally formed. The range of the length-width ratio of the long and thin strip-shaped air port of the range of 2-12 of the range hood disclosed by the invention can form a plurality of rows of long and thin strip-shaped air ports on the hidden panel 11, the strength of the hidden panel 11 is not influenced, the air outlet speed of the long and thin strip-shaped air port is ensured, the stability of a formed air curtain is ensured, and escaped polluted air can be effectively blocked.

Because the hidden panel 11 has a certain thickness, the elongated strip-shaped air port has a height extending along the air outlet direction, and the ratio of the width to the height of the elongated strip-shaped air port ranges from 0.3 to 0.5, so that the air curtain air channel formed by each elongated strip-shaped air port has a certain depth and is narrower in width, and when air passes through the elongated strip-shaped air port, the flow velocity of the air is increased, and the air outlet speed of the elongated strip-shaped air port can be ensured. The air channel corresponding to the elongated strip-shaped air port is an air curtain air channel formed by the elongated strip-shaped air port along the thickness direction of the hidden panel 11, and the length of the air channel corresponding to the elongated strip-shaped air port is the length of the elongated strip-shaped air port, so that the ratio of the length of the air channel corresponding to the elongated strip-shaped air port to the width of the elongated strip-shaped air port is consistent with the length-width ratio of the elongated strip-shaped air port and is 2-12, the air pressure at the elongated strip-shaped air port can be ensured within the thickness range of the hidden panel 11, the stability of the formed air curtain is relatively high, and the polluted air can be effectively prevented from escaping.

Referring to fig. 2 and 3, the air curtain assembly 2 of the present invention further includes a volute tongue 24, wherein the volute tongue 24 is disposed opposite to the volute 23, and the volute tongue 24 extends toward the air curtain exhaust opening 111 and extends to the other side of the air curtain exhaust opening 111; the extension of the tongue 24 is adjacent to the upper surface of the hidden panel 11 and is connected by fasteners. The air introducing end 231 of the volute 23 extends to one side of the air curtain exhaust opening 111, the volute tongue 24 extends to the air curtain exhaust opening 111 and extends to the other side of the air curtain exhaust opening 111, so that when the air curtain motor 22 drives the cross flow wind wheel 21 to rotate, the air flow discharged by the cross flow wind wheel 21 flows between the volute 23 and the volute tongue 24, flows to the air curtain exhaust opening 111 under the guidance of the air introducing end 231 of the volute 23 and one end of the volute tongue 24 extending to the air curtain exhaust opening, and is finally discharged by a plurality of slender strip-shaped air openings forming the air curtain exhaust opening 111. In addition, the end of the spiral case 23 and the spiral tongue 24 far away from the hidden panel 11 forms the air inlet side of the cross-flow wind wheel 21, when the cross-flow wind wheel 21 is driven by the air curtain motor 22 to rotate, air flow enters from the end of the spiral case 23 and the spiral tongue 24 far away from the hidden panel 11 under the driving of the cross-flow wind wheel 21, is discharged from the side of the spiral case 23 and the spiral tongue 24 near the hidden panel 11, and is discharged from the air curtain air outlet 111 on the hidden panel 11 to the outer side of the hidden panel 11.

The range hood also comprises an air quality detection device, wherein the air quality detection device is arranged outside a space surrounded by an air curtain formed by the air curtain assembly 2, the range hood panel 4 and the wind shield 5, and controls the power of a smoke exhaust fan of the range hood and the rotating speed of the cross flow wind wheel 21 under the condition of detecting pollution. The air quality detection device is arranged outside the space surrounded by the air curtain, the smoke ventilator panel 4 and the wind shield 5, the air quality condition detected outside the space by the air quality detection device is the air quality which can be inhaled by a user when cooking operation is carried out, if the air pollution index detected by the air quality detection device exceeds the purification standard, it is indicated that polluted air escapes outside the space surrounded by the air curtain, the smoke ventilator panel 4 and the wind shield 5, the power of the smoke ventilator and the wind wheel rotating speed of the smoke ventilator needs to be improved, the negative pressure formed by the smoke ventilator at the air suction opening 41 is increased, the suction force of smoke is increased, the rotating speed of the cross wind wheel 21 is also increased, and the blocking strength of the polluted air is increased when the flow speed of the air flow exhausted by the air curtain assembly 2 through the air curtain air outlet 111 is increased. When the air pollution index of the air quality detection device detected outside the space surrounded by the air curtain, the smoke ventilator panel 4 and the wind shield 5 is lower than the purification standard, the fact that no polluted air escapes outside the space surrounded by the air curtain, the smoke ventilator panel 4 and the wind shield 5 is indicated, and at the moment, the power of a smoke ventilator and the power of the air curtain assembly 2 of the smoke ventilator can be properly reduced, and the power waste is avoided. The range hood controls the power of the smoke exhaust fan of the range hood and the rotating speed of the cross-flow wind wheel 21 through the pollution control index detected outside the space surrounded by the air curtain, the range hood panel 4 and the wind shield 5 by the air quality detection device, so that the range hood can simplify the air in the kitchen space to meet the health standard of users, and meanwhile, the power waste of the smoke exhaust fan and the air curtain assembly 2 of the range hood can be avoided, and the energy consumption is reduced.

In the range hood of the present invention, when the telescopic body 1 is in an operating state, the air curtain air outlet 111 has an initial position and a limit position, and the air curtain air outlet 111 varies between the initial position and the limit position according to the detection value of the air quality detection device. When the telescopic air curtain component is in a working state, the hidden panel 11 and the hidden top plate are required to extend out of the top plates of the smoke ventilator panel 4 and the smoke ventilator respectively, so that an air curtain air outlet 111 on the hidden panel 11 and a vent hole on the hidden top plate can be exposed, and an air curtain can be formed when the air curtain component 2 is started. When the air curtain assembly 2 exhausts downwards through the air curtain air outlet 111 and forms an air curtain, if the air curtain air outlet 111 is too close to the air conditioner panel 4, the air flow forming the air curtain can impact the air flow formed by the polluted air flowing towards the air suction inlet 41 when flowing downwards, that is, the space between the air curtain and the air conditioner panel 4 does not enclose the air flow formed by the polluted air, so that the air flow formed by the polluted air is impacted by the lower end of the air curtain, the air flow is dispersed and escapes outwards, the air outside the air curtain is polluted, and the user sucks the polluted air. The initial position of the air curtain air outlet 111 refers to the position where the air curtain assembly 2 just surrounds the air flow formed by the air flow discharged downwards through the air curtain air outlet 111 and the air flow formed by the air conditioner panel 4, and the limit position of the air curtain air outlet 111 refers to the position where the air curtain air outlet 111 is located when the push rod 32 of the driving mechanism 3 pushes the telescopic body 1 to the farthest position towards the user, and the air curtain air outlet 111 moves between the initial position and the limit position, so that the space between the air curtain air outlet 111 and the air conditioner panel 4 can surround the widest part of the air flow formed by the polluted air, and the air flow formed by the polluted air is prevented from being impacted by the bottom of the air curtain, so that the polluted air is diffused out of the air curtain and polluted by the user. When the range hood is started, the smoke exhaust fan forms negative pressure at the air suction inlet 41, the air suction inlet 41 sucks air in an area surrounded by the air curtain, the range hood panel 4 and the wind shields 5 on the left side and the right side of the range hood panel 4, the air outside the wind shields 5 on the left side and the right side can flow to the area through a gap between the wind shields 5 and the air curtain, and the inward flowing air flow can also prevent the air on the air flow surface formed by the oil smoke from escaping outwards through the gap between the wind shields 5 and the air curtain. The larger the distance from the air curtain exhaust port 111 to the hood panel 4, the larger the gap between the air curtain and the left and right wind shields 5, the smaller the flow velocity of the air flow flowing in at the gap between the air curtain and the left and right wind shields 5, the smaller the distance from the air curtain exhaust port 111 to the hood panel 4, the smaller the gap between the air curtain and the left and right wind shields 5, and the larger the flow velocity of the air flow flowing in at the gap between the air curtain and the left and right wind shields 5. According to the detection value of the air quality detection device, the condition that polluted air escapes from the gap between the air curtain and the wind shields 5 on the left side and the right side can be judged, then the air curtain air outlet 111 moves back and forth between the initial position and the limit position relative to the air suction port 41, the gap between the air curtain and the wind shields 5 on the left side and the right side can be adjusted in the process that the telescopic main body 1 moves back and forth relative to a user, and the oil smoke in the area surrounded by the air curtain, the smoke machine panel 4 and the wind shields 5 on the left side and the right side of the smoke machine panel 4 can not escape outwards.

Referring to fig. 1, 6 and 7, the range hood of the present invention further includes a lighting device 6, wherein the lighting device 6 is disposed on the telescopic body 1, and includes a PCB board of a main lighting lamp and a lampshade, and a downwardly facing lighting window 112 is disposed on the hidden panel 11; when the telescopic main body 1 is in a working state, the hidden panel 11 moves out of a range hood panel of the range hood, and the lighting device 6 operates; in the hidden state of the telescopic body 1, the hidden panel 11 is positioned in the range hood panel of the range hood, and the lighting device 6 is turned off. When the range hood is started, the driving mechanism 3 is started and switches the telescopic main body 1 to a working state, the hidden panel 11 extends out of the range hood panel of the range hood and moves to the outer side of the range hood panel of the range hood, the downward-facing illumination window 112 on the hidden panel 11 is positioned between the range hood panel of the range hood and a user, the illumination device 6 operates, light emitted by the main illumination lamp is projected downwards through the illumination window 112 and illuminates food in cooking, and the user can observe the food in cooking conveniently; after the user finishes the cooking operation, the smoke exhaust fan of the range hood is turned off, the lighting device 6 is turned off, the main lighting lamp is turned off, the driving mechanism 3 is started and switches the telescopic main body 1 from the working state to the hiding state, the hiding panel 11 starts to move into the panel of the range hood, and the telescopic main body 1 is positioned in the panel of the range hood when being switched to the hiding state.

In the range hood, the illumination window 112 is arranged downwards, and the lampshade is arranged on the hidden panel 11 and covers the PCB of the main illumination lamp. The lamp in the kitchen sets up on the ceiling in kitchen, when the user carries out cooking operation, the user is shone downwards to the lamp on the ceiling, make the user produce the shadow, the shadow that the shadow of user produced down casts can influence the luminance of the region between the range hood panel of user and range hood, inconvenient user observes the food material that is cooked, set up illumination window 112 down on hiding panel 11, be switched to operating condition at telescopic body 1, and behind hiding panel 11 stretching out the range hood panel of range hood, the main light is located the region top that the user encloses with the range hood panel of range hood, the main light is lighted the back, the light that the main light sent down casts through illumination window 112, can be with the region that the user encloses with the range hood panel of range hood, the food material in the convenience of customers observation cooking. The lamp shade cover is arranged on the hidden panel 11 and covers the PCB of the main lighting lamp, so that the situation that the lampblack emitted by the food materials pollutes the PCB of the main lighting lamp through the lighting window 112 in the upward moving process when a user cooks the food materials can be avoided, and the service life of the PCB of the main lighting lamp is reduced.

Referring to fig. 7, in the range hood of the present invention, the illumination window 112 is located at the outer side of the air curtain air outlet 111, the illumination window 112 is disposed parallel to the air curtain air outlet 111 and extends continuously, and the distance L between the air curtain formed by downward air exhaust through the air curtain air outlet 111 and the illumination window 112 is kept between 0.2 cm and 5 cm. When the range hood is started, the driving mechanism 3 is started and switches the telescopic main body 1 to a working state, the hidden panel 11 stretches out of the range hood panel of the range hood and moves to the outer side of the range hood panel of the range hood, the air curtain air outlet 111 moves out of the range hood panel of the range hood and is positioned between the range hood panel of the range hood and a user, the air curtain formed by downwards exhausting air through the air curtain air outlet 111 is positioned at the inner side of the lighting device 6, when the smoke exhaust fan of the range hood is started, air flow formed by cooking fume generated by a user starts to flow to the air suction opening of the range hood, the air flow can outwards escape in the process of flowing to the air suction opening of the range hood, the escaped polluted air can be blocked by the air curtain and can not pass through the air curtain to continue to outwards diffuse, the escaped polluted air can be prevented from being inhaled by the user, the air quality of a kitchen space is ensured, meanwhile, the oil fume in the polluted air is not attached to the lighting window 112 positioned at the outer side of the air curtain air outlet 111 is prevented from being attached to the lighting window 112, the influence on the brightness of the lighting window 112 due to the appearance of the lighting window is avoided, and the influence on the main brightness of the lighting lamp is also avoided. After the user finishes the cooking operation, the smoke exhaust fan of the range hood is turned off, the lighting device 6 is turned off, the air curtain exhaust port 111 stops supplying air downwards, the driving mechanism 3 is started and switches the telescopic body 1 from the working state to the hiding state, and the hiding panel 11 starts to move into the panel of the range hood and is positioned in the panel of the range hood when the telescopic body 1 is switched to the hiding state. The distance L between an air curtain formed by downwards exhausting air through the air curtain exhaust opening 111 and the illumination window 112 is kept, the distance between one side of the air curtain exhaust opening 111, which is close to the smoke panel of the range hood, and one side of the illumination window 112, which is close to the smoke panel of the range hood, is L, the illumination window 112 and the air curtain exhaust opening 111 are both arranged on the hidden panel 11, the strength of the hidden panel 11 can be influenced due to the fact that the L is too small, the distance between the illumination window 112 and the smoke panel of the range hood is too large, the center of light projected downwards by the main illumination lamp is deviated to the user side, and the illumination effect of the main illumination lamp on food in cooking is influenced; and L is too big, the length of the hidden panel 11 that needs is also bigger, and when hidden panel 11 stretches out the range hood panel of range hood, hidden panel 11 stretches out the length ratio great, influences the station when the user operates. Therefore, the telescopic lighting assembly maintains the distance L between the air curtain formed by downwards exhausting air through the air curtain exhaust opening 111 and the lighting window 112, and L is 0.2 cm to 5 cm, so that the strength of the hidden panel 11 can be ensured, the center of light downwards projected by the main lighting lamp faces to cooked food during the process, and the standing position of a user during the cooking process is not influenced by the overlong extending length of the hidden panel 11.

In the range hood, the distance between the hidden top plate and the hidden panel 11 is 2 cm to 15 cm, and part of air flow passing through the vent holes passes through the outer side of the lampshade and is sucked by the air curtain component 2. The space between the hidden top plate and the hidden panel 11 is the height of the accommodating cavity, the air curtain component 2 cannot be arranged in the accommodating cavity, the height of the accommodating cavity is too high, and the larger the space required by the telescopic main body 1 of the range hood is, the whole size of the range hood is affected. When the air curtain component 2 is started, the air curtain component 2 extracts air in the accommodating cavity through the vent hole, so that negative pressure is formed in the accommodating cavity, air above the hidden top plate enters the accommodating cavity through the vent hole and forms air flow, and part of the air flow entering the accommodating cavity is extracted by the air curtain component 2 after passing through the outer side of the lampshade and is then discharged through the air curtain air outlet 111. When part of air flow entering the accommodating cavity passes through the outer side of the lampshade, heat of the lampshade is taken away, and the lampshade is cooled.

The range hood panel 4 is also provided with a panel illuminating lamp, the brightness of the panel illuminating lamp is smaller than that of the main illuminating lamp, the panel illuminating lamp faces to the lower side and the front side, and the angle between the facing direction and the vertical direction is 65-90 degrees. After the range hood is started, the panel illuminating lamp is lightened, light emitted by the panel illuminating lamp is emitted along the direction which is 65-90 degrees with the vertical direction, the brightness of the main illuminating lamp is supplemented, and when a kitchen lamp is further desalted and irradiated to a user and the range hood, the user and the lower range hood project to the kitchen setting position under the range hood, so that the user can more clearly observe food in cooking.

The range hood of the present invention further comprises a main controller electrically connected with the driving mechanism 3 and the touch key or the physical key, wherein when the movement direction of the driving telescopic body 1 is opposite to the direction of the user operating the touch key or the physical key, the front panel 12 moves to pass through the position of the finger of the user when the touch key or the physical key is triggered. The user starts the driving mechanism 3 through the touch key or the entity key, the direction of the user starting the touch key or the entity key is the direction of applying acting force to the touch key or the entity key far away from the user, after the touch key or the entity key is started, the touch key or the entity key starts the driving mechanism 3, the driving mechanism 3 stretches the movement of the main body 1, the driving mechanism 3 drives the telescopic body 1 and enables the running direction of the telescopic body 1 to be opposite to the direction of the user operating the touch key or the entity key, and the driving mechanism 3 drives the telescopic body 1 and enables the running direction of the telescopic body 1 to be identical to the direction of the user operating the touch key or the entity key. In the process that the driving mechanism drives the telescopic body 1 to move towards the direction where the user is located, the front panel 12 moves to the position where the user's finger is located when the touch key or the physical key is triggered, that is, the distance that the front panel 12 moves towards the user is greater than the distance that the user moves away from the finger when the user manipulates the touch key or the physical key.

The front panel 12 of the telescopic air curtain component of the range hood is provided with a window penetrating infrared rays, the window is arranged on one side or two sides of a touch key or a physical key, an infrared emitter and an infrared receiver are arranged in the window in a separated mode, and the infrared receiver judges whether a finger of a user exists according to whether reflected rays of infrared rays emitted by the infrared emitter are received or not. After a user starts the driving mechanism 3 through a touch key or a physical key, the driving mechanism 3 operates and drives the telescopic main body 1 to move towards the direction of the user, at this time, if the user's finger does not leave the front panel 12 in time, the driving mechanism 3 drives the telescopic main body 1 to move towards the side of the user, so that the front panel 12 can strike the user's finger, in order to avoid that the user's finger does not leave the front panel 12 in time, the driving mechanism 3 drives the telescopic main body 1 to move towards the side of the user, a window with infrared transmitting function is arranged on the front panel 12, an infrared emitter and an infrared receiver are separately arranged in the window, and when the user's finger leaves the front panel 12, the infrared emitted by the infrared emitter can be received by the infrared receiver, and when the user's finger does not leave the front panel 12, the existence of the user's finger can not enable the infrared emitted by the infrared emitter to be received by the infrared receiver. The infrared receiver judges whether a user finger exists according to whether the infrared receiver receives the reflected rays of the infrared rays emitted by the infrared emitter, when judging that the user finger exists, the driving mechanism 3 does not operate under the instruction of the main controller, when judging that the user finger does not exist, the driving mechanism 3 operates and drives the telescopic main body 1 to extend towards the side where the user exists, and in the extending process, the front panel 12 passes through the position where the user finger exists when the touch key or the physical key is triggered.

The hidden panel 11 and the front panel 12 of the range hood of the invention and the range hood panel of the range hood are provided with light guide gaps or light guide channels, the light guide gaps are communicated to the outside, and the light guide channels are communicated to a light transmission window on the range hood panel of the range hood; or a panel lighting lamp is arranged on the panel of the range hood. The hidden panel 11 and the front panel 12 of the telescopic main body 1 of the telescopic display control assembly and the range hood panel 4 of the range hood are provided with a light guide gap and a light guide channel, the light guide gap is communicated to the outside, and the light guide channel is communicated to a light transmission window on the range hood panel 4 of the range hood. After the touch key or the physical key is touched, the lighting device 6 is started together with the driving mechanism 3, the light emitted by the main lighting lamp of the lighting device 6 passes through the lighting window 112, and when the hidden panel 11 does not extend out of the interior of the cigarette machine panel 4, and the lighting window 112 is still in the interior of the cigarette machine panel 4, one part of the light passing through the lighting window 112 can be emitted from the light guide gap between the front panel 12 and the cigarette machine panel 4, and the other part of the light can enter the duct channel and then pass out from the light transmission window on the cigarette machine panel 4. The light emitted by the light guide gap and the light emitted by the light transmission window on the smoke ventilator panel 4 can enable a user to know whether the lighting device 6 is in a starting state when the telescopic main body 1 is switched to a working state; the light emitted by the light guide gap and the light emitted by the light transmission window on the smoke machine panel 4 can enable a user to know whether the lighting device 6 is in the closed state when the telescopic main body 1 is switched to the hidden state, and when the telescopic main body 1 is switched to the hidden state, if the light emitted by the light guide gap and the light transmission window on the smoke machine panel 4 still exists, the switching to the hidden state of the telescopic main body 1 is described, and when the lighting window 112 enters the smoke machine panel 4, the lighting device 6 is still not closed, so that the user can check conveniently, and the lighting device 6 is prevented from being closed.

In other embodiments, the hidden panel 11 and the front panel 12 of the telescopic main body 1 of the telescopic display control assembly and the range hood panel 4 of the range hood are provided with light guide gaps, the light guide gaps are communicated to the outside, a light transmission window is arranged on the range hood panel 4, and a panel illuminating lamp is arranged on the range hood panel 4. After the touch key or the physical key is touched, the lighting device 6 is started together with the driving mechanism 3, and the light emitted by the main lighting lamp of the lighting device 6 passes through the lighting window 112, and when the hidden panel 11 is not yet fully extended out of the smoke panel 4 and the lighting window 112 is still in the smoke panel 4, a part of the light passing through the lighting window 112 is emitted from the light guiding gap between the front panel 12 and the smoke panel 4.

The invention relates to a range hood, which comprises a main controller, a control device and a control device, wherein the main controller is used for controlling the operation method of the range hood to be as follows: after the range hood is started, a user operates on the touch key or the physical key, then the main controller detects whether the touch key or the physical key is triggered, if the main controller detects that the touch key or the physical key is triggered, namely, the lighting device 6 of the telescopic display control assembly and the panel lighting lamp on the range hood panel 4 are started, the infrared transmitter and the infrared receiver are simultaneously started, the panel lighting lamp on the lighting device 6 and the range hood panel 4 begin to flash, the infrared transmitter starts to emit infrared rays, if the infrared receiver does not receive a reflection signal, the finger of the user does not leave the front panel 12 in time, at this time, the main controller enables the lighting device 6 and the range hood panel 4 to keep flashing for a period of 0.1 to 5 seconds, after the infrared receiver receives the reflection signal, the main controller enables the lighting device 6 and the range hood panel 4 to stop flashing and to light normally, and simultaneously starts the driving mechanism 3 to enable the telescopic main body 1 to work tangentially from a hidden state, when the air curtain outlet 111 on the hidden panel 11 is exposed out of the range hood panel 4 of the range hood, the air curtain assembly 2 is started, and the air curtain assembly is enabled to pass through the air curtain outlet 111 to form an air curtain outlet 111.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.

Claims

1. A telescopic air curtain assembly for a range hood, comprising:

a telescopic body (1) comprising a hidden panel (11), wherein the hidden panel (11) is provided with an air curtain exhaust outlet (111) facing downwards;

an air curtain component (2) which is arranged on the telescopic main body (1);

the driving mechanism (3) drives the telescopic main body (1) to move forwards and backwards, so that the telescopic main body (1) has a working state and a hiding state, and in the working state, the hiding panel (11) moves out of a smoke ventilator panel of the smoke ventilator, and the air curtain assembly (2) operates; in the hidden state, the hidden panel (11) is positioned in a range hood panel of the range hood.

2. A telescopic air curtain assembly according to claim 1, wherein the air curtain exhaust opening (111) is elongated, extends along the left-right direction of the hidden panel (11), and forms an air curtain parallel to at least one side of the air intake opening of the range hood.

3. The telescopic air curtain assembly according to claim 1, wherein the telescopic main body (1) further comprises a front panel (12) and a hidden top plate, the hidden panel (11), the front panel (12) and the hidden top plate jointly enclose a containing cavity, the front panel (12) is provided with a touch key, and the touch key is used for controlling the driving mechanism (3) to drive the telescopic main body (1) to switch between a hidden state and a working state.

4. A telescopic air curtain assembly according to claim 3, wherein the hidden roof is provided with a vent, in the hidden state of the telescopic body (1) the hidden roof is in the roof of the range hood, in the operational state of the telescopic body (1) the hidden roof protrudes out of the roof of the range hood and air enters the vent to be inhaled by the air curtain assembly (2).

5. A telescopic air curtain assembly according to any one of claims 1 to 4, wherein the driving mechanism (3) comprises a driving motor (31), a push rod (32) and a guiding structure, the driving end of the driving motor (31) is connected to the push rod (32) to enable the push rod (32) to drive the telescopic main body (1) to push and pull reciprocally, the guiding structure is arranged in the accommodating cavity, and the guiding structure comprises a guiding piece (33) fixed in the accommodating cavity and a guiding rail (34) sliding along the guiding piece (33); or the guide structure comprises a guide rail (34) fixed in the accommodating cavity and a guide piece (33) sliding along the guide rail (34).

6. A range hood comprising a telescopic air curtain assembly according to any one of claims 1 to 5, and further comprising a hood panel (4), wherein the hood panel (4) is provided with an air suction opening (41) extending in the left-right direction, and air discharged from the air curtain air outlet (111) is sucked by the air suction opening (41) and enters a smoke exhaust channel of the range hood.

7. The range hood according to claim 6, wherein the air suction opening (41) is a long and narrow air suction opening, the left side and the right side of the hood panel (4) are provided with wind shields (5), and the air curtain air outlet (111) can move back and forth relative to the air suction opening (41) when the telescopic main body (1) is driven by the driving mechanism (3) to move.

8. The range hood according to claim 6, wherein the air curtain assembly (2) comprises a cross flow wind wheel (21), an air curtain motor (22) driving the cross flow wind wheel (21) and a volute (23) forming a vertical air guide on the air outlet side, an air introducing end (231) of the volute (23) is close to one side of the air curtain air outlet (111), the air curtain air outlet (111) is divided into a plurality of elongated strip-shaped air outlets, and the plurality of elongated strip-shaped air outlets are arranged in 2-3 rows.

9. The range hood according to claim 6, further comprising an air quality detection device, wherein the air quality detection device is arranged outside a space surrounded by an air curtain formed by the air curtain assembly (2) and the panel (4) and the wind shield (5) of the range hood, and controls the power of the smoke exhaust fan of the range hood and the power of the air curtain assembly (2) by detecting pollution.

10. The range hood according to claim 9, wherein the air curtain exhaust port (111) has an initial position and a limit position when the telescopic body (1) is in an operating state, and the air curtain exhaust port (111) is varied between the initial position and the limit position according to a detection value of the air quality detection device.