Range hood

Abstract

The utility model relates to the technical field of kitchen appliances, and discloses a range hood which comprises a range hood body, an exhaust fume collecting hood; each auxiliary ventilation device comprises an auxiliary air duct, and a first ventilation opening, a second ventilation opening and a third ventilation opening are formed in each auxiliary air duct; the control device is suitable for controlling the main wind wheel and the auxiliary wind wheel to be opened and controlling the first ventilation opening, the second ventilation opening and the third ventilation opening of the auxiliary ventilation device arranged corresponding to the first stove to be opened when the first stove works and the second stove is closed, so that the first ventilation opening arranged corresponding to the first stove blows air outwards; a first ventilation opening and a third ventilation opening of an auxiliary ventilation device corresponding to the second stove are controlled to be opened, and a second ventilation opening is controlled to be closed, so that the first ventilation opening corresponding to the second stove sucks air inwards. In this way, escaped oil smoke can be sucked into the range hood body through the auxiliary wind wheel, and the oil smoke suction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a range hood. Background Art

[0002] As people's living standards continue to improve, range hoods have gradually become an indispensable household appliance in the kitchen. Range hoods can discharge the fumes generated during cooking out of the kitchen, which not only purifies the kitchen environment, but is also beneficial to human health, greatly improving people's experience when cooking.

[0003] Although all range hoods have a smoke collecting chamber in their structure, which can increase the smoke collection effect of the range hood, the oil smoke generated when the user cooks is emitted in a disorderly state above the stove. The range hood is installed above the wok and can absorb the oil smoke, but some of the oil smoke will escape from the bottom edge of the smoke collecting chamber to the outside of the smoke collecting chamber, affecting the smoke collection effect.

[0004] In the prior art, the suction effect is improved by increasing the suction power of the range hood, but the suction power of the range hood is affected by many factors, among which noise is an important factor. The greater the suction power, the greater the noise. As a household kitchen appliance, the suction power of the oil fume cannot be increased indefinitely. Therefore, how to block this part of the escaping oil fume and allow the range hood to suck it away is a problem to be solved. Utility Model Content

[0005] In view of this, the utility model provides a range hood to solve the problem that part of the oil smoke escapes from the edge of the existing range hood when smoking, thus affecting the oil smoke extraction effect.

[0006] The utility model provides a range hood, which is suitable for being arranged above a stove, wherein the stove comprises a first stove and a second stove, and the range hood comprises:

[0007] A range hood body, wherein a main wind wheel and a main wind duct are arranged in the range hood body, wherein the main wind duct comprises an air inlet and an air outlet, and wherein the air outlet is suitable for communicating with the outside world;

[0008] A smoke collecting hood, wherein the smoke collecting hood has a smoke collecting cavity, and the smoke collecting cavity is connected to the air inlet;

[0009] At least two auxiliary ventilation devices are respectively arranged on at least two sides of the smoke collecting hood and are respectively arranged on the outer sides of the first cooker and the second cooker, the auxiliary ventilation device comprises an auxiliary air duct, an auxiliary wind wheel is arranged in the auxiliary air duct, a first ventilation port, a second ventilation port and a third ventilation port are arranged on the auxiliary air duct, the first ventilation port is communicated with the smoke collecting chamber, a second opening and closing structure is arranged at the second ventilation port, the second opening and closing structure is suitable for opening the second ventilation port to communicate with the outside, and the third ventilation port is communicated with the main air duct;

[0010] a control device connected with the main wind wheel, the auxiliary wind wheel and the second opening and closing structure, and adapted to control the main wind wheel and the auxiliary wind wheel to open, control the first vent, the second vent and the third vent of the auxiliary ventilation device corresponding to the first cooker to open, so that the first vent corresponding to the first cooker blows air outward; and control the first vent and the third vent of the auxiliary ventilation device corresponding to the second cooker to open and the second vent to close, so that the first vent corresponding to the second cooker draws air inward.

[0011] Beneficial effect: by arranging at least two auxiliary ventilation devices corresponding to the first cooker and the second cooker, and the auxiliary ventilation devices are respectively arranged on both sides of the smoke collecting hood, when the first cooker is working and the second cooker is turned off, oil smoke will be emitted from the first cooker, and the control device controls the main wind wheel to open, so that most of the oil smoke is sucked into the smoke collecting chamber by the main wind wheel and discharged from the air outlet, and the control device controls the auxiliary wind wheel to open, and controls the first ventilation port, the second ventilation port and the third ventilation port of the auxiliary ventilation device corresponding to the first cooker to be opened, so that the first ventilation port blows air outward, so that a wind curtain can be formed at the first ventilation port, preventing the oil smoke from escaping to the outside of the first ventilation port, and can only escape to the other side of the range hood, and because the control device will simultaneously control the first ventilation port and the third ventilation port of the auxiliary ventilation device corresponding to the second cooker to be opened and the second ventilation port to be closed, so that the first ventilation port sucks air inward, the oil smoke escaping to the other side will be sucked into the range hood body by the main wind wheel and the auxiliary wind wheel corresponding to the second cooker, thereby improving the oil smoke extraction effect.

[0012] In an optional embodiment, the range hood comprises:

[0013] The first opening and closing structure is arranged at the first vent, and the first opening and closing structure is connected to the control device, and is suitable for the control device to control the first opening and closing structure to open the first vent when the range hood is working, and to control the first opening and closing structure to close the first vent when the range hood is turned off.

[0014] Beneficial effect: By arranging the first opening and closing structure at the first vent, it is convenient for the control device to automatically open or close the first vent, so that the range hood is more automated.

[0015] In an optional embodiment, the first opening and closing structure and / or the second opening and closing structure includes:

[0016] A driving unit, fixedly connected in the auxiliary air duct, the driving unit being connected to the control device;

[0017] The shielding part has one end connected to the driving part and is suitable for rotating under the drive of the driving part to open and close the first vent and / or the second vent.

[0018] Beneficial effect: By configuring the first opening and closing structure and / or the second opening and closing structure to include a driving part and a shielding part, it is convenient to drive the shielding part to open and close the first vent and / or the second vent under the control of the control device, and the structure is relatively simple.

[0019] In an optional implementation, the driving part is a motor, and the shielding part is a windshield.

[0020] In an optional embodiment, when the first ventilation opening is opened, the wind shield extends out of the smoke collecting hood.

[0021] Beneficial effect: by setting the shielding part as a windshield, and the windshield extending out of the smoke collecting hood when the first vent is opened, the windshield can also play a certain role in blocking the oil smoke that is dispersed outside, thereby further improving the blocking effect of the oil smoke.

[0022] In an optional embodiment, the range hood comprises:

[0023] The third opening and closing structure is arranged at the third vent, and the third opening and closing structure is connected to the control device. It is suitable for the control device to control the third opening and closing structure to close the third vent when the first vent blows air outward, and to control the third opening and closing structure to open the third vent when the first vent sucks air inward.

[0024] Beneficial effect: By arranging the third opening and closing structure at the third vent, it is convenient for the control device to automatically open or close the third vent, so that the range hood is more automated. At the same time, when the first vent blows air outward, the third opening and closing structure is controlled to close the third vent, which can also prevent the external air introduced by the second vent from being sucked into the range hood body by the main wind wheel, affecting the formation of the wind curtain at the first vent and reducing the oil fume absorption effect. When the first vent sucks air inward, the third opening and closing structure is controlled to open the third vent, which is conducive to the oil fume being sucked into the main air duct.

[0025] In an optional embodiment, the control device is suitable for controlling the auxiliary wind wheel of the auxiliary ventilation device corresponding to the first cooker to rotate in a first direction, so that the first vent corresponding to the first cooker blows air outward; the control device controls the auxiliary wind wheel of the auxiliary ventilation device corresponding to the second cooker to rotate in a second direction, so that the first vent corresponding to the second cooker draws air inward, and the first direction is opposite to the second direction.

[0026] Beneficial effect: By controlling the auxiliary wind wheel to rotate in opposite directions, the first vent can blow air outwards and suck air inwards, and the structure is relatively simple.

[0027] In an optional embodiment, the control device is suitable for controlling the main wind wheel and the auxiliary wind wheel to open when the first cooker and the second cooker are both in operation, so that the first vents both blow air outwards.

[0028] Beneficial effect: When the first cooker and the second cooker are both working, the main wind wheel and the auxiliary wind wheel are controlled to be turned on, so that the first vents blow air outward, so that wind curtains are formed on the outsides of the first cooker and the second cooker respectively to prevent the oil smoke from escaping to the outside, so that the oil smoke is sucked into the inside of the range hood body by the main wind wheel and the auxiliary wind wheel, thereby improving the oil smoke adsorption effect.

[0029] In an optional embodiment, two auxiliary ventilation devices are provided, which are respectively arranged on both sides of the smoke collecting hood and are arranged in a one-to-one correspondence with the first stove and the second stove.

[0030] In an optional embodiment, the first vent is arranged at the lower end of the auxiliary air duct, the second vent is arranged at the middle of the auxiliary air duct, and the third vent is arranged at the upper end of the auxiliary air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A cross-sectional view of a range hood with an auxiliary ventilation device closed according to an embodiment of the utility model;

[0033] Figure 2 for Figure 1 A is a partial enlarged schematic diagram;

[0034] Figure 3 for Figure 1 A partial enlarged schematic diagram of B in the middle;

[0035] Figure 4 a cutaway view showing the auxiliary ventilation of the range hood;

[0036] Figure 5 for Figure 4 A partial enlarged schematic diagram of C in the middle;

[0037] Figure 6 A working principle diagram of a range hood with the first cooker working and the second cooker turned off;

[0038] Figure 7 A working principle diagram of a range hood for shutting down a second cooker for a first cooker;

[0039] Figure 8 This is a working principle diagram of a range hood in which a first cooker and a second cooker operate simultaneously.

[0040] Description of reference numerals:

[0041] 1- First cooker;

[0042] 2- Second cooking stove;

[0043] 3- Range hood body;

[0044] 4- Main wind wheel;

[0045] 5- Main air duct;

[0046] 6-smoke collecting hood; 601-smoke collecting chamber;

[0047] 7- auxiliary ventilation device; 701- auxiliary air duct; 702- first vent; 703- second vent; 704- third vent; 705- first opening and closing structure; 706- second opening and closing structure; 707- third opening and closing structure; 708- auxiliary wind wheel;

[0048] 8-Snail case;

[0049] 9- Main motor;

[0050] 10- Exhaust duct;

[0051] 11- Check valve. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0053] Combine the following Figures 1 to 8 , describing an embodiment of the utility model.

[0054] According to an embodiment of the utility model, a range hood is provided, which is suitable for being arranged above a stove, wherein the stove comprises a first stove 1 and a second stove 2, and the range hood comprises:

[0055] A range hood body 3, in which a main wind wheel 4 and a main wind duct 5 are arranged, the main wind duct 5 includes an air inlet and an air outlet, and the air outlet is suitable for communicating with the outside world;

[0056] A smoke collecting hood 6, wherein the smoke collecting hood 6 has a smoke collecting cavity 601, and the smoke collecting cavity 601 is connected to the air inlet;

[0057] At least two auxiliary ventilation devices 7 are respectively arranged on at least two sides of the smoke collecting hood 6, and are respectively arranged on the outsides of the first cooker 1 and the second cooker 2, the auxiliary ventilation device 7 comprises an auxiliary air duct 701, an auxiliary wind wheel 708 is arranged in the auxiliary air duct 701, a first vent 702, a second vent 703 and a third vent 704 are arranged on the auxiliary air duct 701, the first vent 702 is communicated with the smoke collecting chamber 601, a second opening and closing structure 706 is arranged at the second vent 703, the second opening and closing structure 706 is suitable for opening the second vent 703 to communicate with the outside, and the third vent 704 is communicated with the main air duct 5;

[0058] The control device is connected with the main wind wheel 4, the auxiliary wind wheel 708 and the second opening and closing structure 706, and is suitable for controlling the main wind wheel 4 and the auxiliary wind wheel 708 to open when the first cooker 1 is working and the second cooker 2 is closed, and controlling the first vent 702, the second vent 703 and the third vent 704 of the auxiliary ventilation device 7 corresponding to the first cooker 1 to be opened, so that the first vent 702 corresponding to the first cooker 1 blows air outward; and controlling the first vent 702 and the third vent 704 of the auxiliary ventilation device 7 corresponding to the second cooker 2 to be opened and the second vent 703 to be closed, so that the first vent 702 corresponding to the second cooker 2 draws air inward.

[0059] At least two auxiliary ventilation devices 7 are provided corresponding to the first stove 1 and the second stove 2, and the auxiliary ventilation devices 7 are respectively provided on both sides of the smoke collecting hood 6. When the first stove 1 is working and the second stove 2 is turned off, oil smoke will be emitted from the first stove 1. The control device controls the main wind wheel 4 to open, so that most of the oil smoke is sucked into the smoke collecting chamber 601 by the main wind wheel 4 and discharged from the air outlet after passing through the main air duct 5. The control device controls the auxiliary wind wheel 708 to open, and controls the first ventilation port 702, the second ventilation port 703 and the third ventilation port 704 of the auxiliary ventilation device 7 provided corresponding to the first stove 1 to open, so that The first vent 702 blows air outwards, so that a wind curtain can be formed at the first vent 702 to prevent the oil smoke from escaping to the outside of the first vent 702 and only dissipating it to the other side of the range hood. Since the control device will simultaneously control the first vent 702 and the third vent 704 of the auxiliary ventilation device 7 corresponding to the second cooker 2 to be opened and the second vent 703 to be closed, so that the first vent 702 draws air inwards, the oil smoke dissipated to the other side will be sucked into the interior of the range hood body 3 by the main wind wheel 4 and the auxiliary wind wheel 708 corresponding to the second cooker 2, thereby improving the oil smoke absorption effect.

[0060] like Figure 1 As shown, in this embodiment, there are two auxiliary ventilation devices 7, which are respectively arranged on both sides of the smoke collecting hood 6, and are arranged one by one with the first stove 1 and the second stove 2. Generally, the size of the smoke collecting hood 6 is set to be larger than the maximum distance between the first stove 1 and the second stove 2, so the auxiliary ventilation devices 7 on both sides are respectively arranged on the outside of the first stove 1 and the second stove 2. As a convertible embodiment, it is also possible to set more auxiliary ventilation devices 7, such as two auxiliary ventilation devices 7 are correspondingly arranged on the outside of the first stove 1, and two auxiliary ventilation devices 7 are correspondingly arranged on the outside of the second stove 2, or one auxiliary ventilation device 7 is correspondingly arranged on the outside of the first stove 1, and two auxiliary ventilation devices 7 are correspondingly arranged on the outside of the second stove 2, or more auxiliary ventilation devices 7 are arranged, and there is no excessive restriction here.

[0061] The specific arrangement of the main air duct 5 and the auxiliary ventilation device 7 is as follows Figure 1 As shown, the main air duct 5 is arranged in the middle of the range hood, and two auxiliary ventilation devices 7 are respectively arranged on both sides of the main air duct 5.

[0062] For the specific arrangement of the vents on the auxiliary ventilation device 7, as shown in FIG. Figure 2 and Figure 3As shown, the first vent 702 is arranged at the lower end of the auxiliary air duct 701, the second vent 703 is arranged at the middle of the auxiliary air duct 701, and the third vent 704 is arranged at the upper end of the auxiliary air duct 701. By arranging the second vent 703 at the middle of the auxiliary air duct 701, the second vent 703 is relatively far away from the first vent 702 and the third vent 704, so as to prevent the second vent 703 connected to the outside from affecting the oil fume adsorption effect.

[0063] The range hood in this embodiment includes: a first opening and closing structure 705, which is arranged at the first vent 702, and the first opening and closing structure 705 is connected to the control device, and is suitable for the control device to control the first opening and closing structure 705 to open the first vent 702 when the range hood is working, and to control the first opening and closing structure 705 to close the first vent 702 when the range hood is turned off.

[0064] By providing the first opening and closing structure 705 at the first vent 702, it is convenient for the control device to automatically open or close the first vent 702, so as to make the range hood more automated. As a convertible embodiment, it is also possible that the first opening and closing structure 705 is not provided at the first vent 702, but the first vent 702 is always opened and connected to the smoke collecting chamber 601.

[0065] There are many specific forms of the first opening and closing structure 705. In this embodiment, the first opening and closing structure 705 includes:

[0066] A driving unit is fixedly connected in the auxiliary air duct 701, and the driving unit is connected to the control device;

[0067] The shielding part has one end connected to the driving part and is suitable for rotating under the driving of the driving part to open and close the first vent 702.

[0068] By configuring the first opening and closing structure 705 to include a driving part and a shielding part, it is convenient to drive the shielding part to open and close the first vent 702 under the control of the control device, and the structure is relatively simple.

[0069] It should be noted that, in other embodiments, the first opening and closing structure 705 may also be a solenoid valve, which is connected to a control device, and the control device controls the solenoid valve to open or close the first vent 702 .

[0070] Specifically, the driving part is a motor, and the shielding part is a windshield. The motor rotates to drive the windshield to rotate. When the windshield completely blocks the first vent 702, the first vent 702 is closed. When the windshield rotates 90° relative to the first vent 702, the first vent 702 is opened. As a convertible embodiment, the driving part and the shielding part can also be in other forms, such as a form in which a motor drives a gear rack, and no excessive restrictions are made here.

[0071] In order to further improve the barrier effect of oil smoke, Figure 5 As shown, when the windshield opens the first vent 702, the windshield extends out of the smoke hood 6, so that the windshield can also play a certain role in blocking the oil smoke that is dispersed. As a convertible embodiment, it is also possible that when the windshield opens the first vent 702, the windshield does not extend out of the smoke hood 6, but only relies on the wind curtain blown out of the first vent 702 to block the oil smoke.

[0072] The specific structure of the second opening and closing structure 706 can be the same as the first opening and closing structure 705, both of which include a driving part and a shielding part, and the shielding part is suitable for rotating under the drive of the driving part to open and close the second vent 703. The second opening and closing structure 706 is used to control the source of air when blowing out the wind curtain. This air comes from the outside of the auxiliary air duct 701, that is, the outside air, ensuring that the air blown out from the first vent 702 to form the wind curtain is clean.

[0073] Of course, in other embodiments, the specific structure of the second opening and closing structure 706 may also be different from that of the first opening and closing structure 705 , such as the second opening and closing structure 706 being a solenoid valve.

[0074] The third ventilation opening 704 is the intersection of the auxiliary air duct 701 and the main air duct 5. The oil smoke sucked in from the auxiliary air duct 701 can flow into the main air duct 5 through the intersection and then be discharged from the air outlet.

[0075] like Figure 2 and Figure 3 As shown, the range hood in this embodiment includes:

[0076] The third opening and closing structure 707 is arranged at the third vent 704. The third opening and closing structure 707 is connected to the control device and is suitable for the control device to control the third opening and closing structure 707 to close the third vent 704 when the first vent 702 blows air outwards, and to control the third opening and closing structure 707 to open the third vent 704 when the first vent 702 sucks air inwards.

[0077] By arranging the third opening and closing structure 707 at the third vent 704, it is convenient for the control device to automatically open or close the third vent 704, so as to make the range hood more automated. At the same time, when the first vent 702 blows air outward, the third opening and closing structure 707 is controlled to close the third vent 704, which can also prevent the external air introduced by the second vent 703 from being sucked into the range hood body 3 by the main wind wheel 4, affecting the formation of the wind curtain at the first vent 702 and reducing the oil fume absorption effect. When the first vent 702 sucks air inward, the third opening and closing structure 707 is controlled to open the third vent 704, which is conducive to the oil fume being sucked into the main air duct 5.

[0078] As a convertible implementation, the third opening and closing structure 707 may not be provided at the third ventilation opening 704 , but the third ventilation opening 704 may be always in communication with the main air duct 5 .

[0079] The specific structure of the third opening and closing structure 707 may be the same as that of the first opening and closing structure 705 , both including a driving part and a shielding part, wherein the shielding part is adapted to rotate under the driving of the driving part to open and close the third vent 704 .

[0080] Of course, in other embodiments, the specific structure of the third opening and closing structure 707 may also be different from the first opening and closing structure 705, such as the third opening and closing structure 707 is a solenoid valve.

[0081] The control device in this embodiment is suitable for controlling the auxiliary wind wheel 708 of the auxiliary ventilation device 7 arranged corresponding to the first cooker 1 to rotate in a first direction, so that the first ventilation port 702 arranged corresponding to the first cooker 1 blows air outward; the control device controls the auxiliary wind wheel 708 of the auxiliary ventilation device 7 arranged corresponding to the second cooker 2 to rotate in a second direction, so that the first ventilation port 702 arranged corresponding to the second cooker 2 draws air inward, and the first direction is opposite to the second direction.

[0082] By controlling the auxiliary wind wheel 708 to rotate in opposite directions, the first vent 702 can blow air outwards and suck air inwards, and the structure is relatively simple.

[0083] As a convertible embodiment, the control of the two auxiliary wind wheels 708 can also be independent of each other, such as one of the auxiliary wind wheels 708 rotates along the first direction to make the first vent 702 corresponding thereto blow air outward, while the other auxiliary wind wheel 708 rotates along the first direction to make the first vent 702 corresponding thereto draw air inward.

[0084] An auxiliary motor is provided in the auxiliary ventilation device 7, and the auxiliary motor is connected to the auxiliary wind wheel 708 to drive the auxiliary wind wheel 708 to rotate. The auxiliary air duct 701 is installed on the periphery of the auxiliary wind wheel 708, covering the auxiliary motor and the auxiliary wind wheel 708 to form a channel cavity.

[0085] The auxiliary wind wheel 708 is installed behind the first opening and closing structure 705, and is used to absorb the oil smoke intercepted by the first opening and closing structure 705, and bring the escaped oil smoke into the auxiliary air duct 701; when the auxiliary wind wheel 708 reverses, a wind curtain can be blown out from the auxiliary air duct 701 to block the oil smoke, and when the auxiliary wind wheel 708 rotates forward, the oil smoke can be absorbed into the auxiliary air duct 701. Driven by the auxiliary motor, the auxiliary wind wheel 708 can rotate forward and reverse according to actual needs.

[0086] Since the user often uses the first cooker 1 and the second cooker 2 at the same time when cooking, in this embodiment, the control device is suitable for controlling the main wind wheel 4 and the auxiliary wind wheel 708 to open when both the first cooker 1 and the second cooker 2 are working, so that the first vents 702 blow air outwards.

[0087] When the first cooker 1 and the second cooker 2 are both in operation, the main wind wheel 4 and the auxiliary wind wheel 708 are controlled to be turned on, so that the first vents 702 blow air outwards, so that wind curtains are formed on the outsides of the first cooker 1 and the second cooker 2, respectively, to prevent the oil smoke from escaping to the outside, so that the oil smoke is sucked into the interior of the range hood body 3 by the main wind wheel 4 and the auxiliary wind wheel 708, thereby improving the oil smoke adsorption effect.

[0088] In order to facilitate the automatic linkage between the range hood and the first cooker 1 and the second cooker 2, the control device of the range hood in this embodiment can be wirelessly connected to the first cooker 1 and the second cooker 2 respectively, such as WIFI connection or Bluetooth connection. When the cookers are working and the range hood is turned on, the control device will receive a connection success signal, indicating that the cookers are working. For example, when the first cooker 1 on the left is working, the control device will receive a connection success signal on the left, indicating that the first cooker 1 is working; when the first cooker 1 on the right is working, the control device will receive a connection success signal on the right, indicating that the second cooker 2 is working; when the first cooker 1 and the second cooker 2 are working at the same time, the control device will receive two connection success signals, indicating that both cookers are working.

[0089] In other embodiments, a fume concentration sensor may be provided to detect whether the cooker is working or not. Specifically, two fume concentration sensors may be provided, and the two fume concentration sensors are provided corresponding to the first cooker 1 and the second cooker 2, respectively. The fume concentration sensors are connected to the control device, and are suitable for indicating that the first cooker 1 and / or the second cooker 2 is working when the fume concentration sensor detects that the fume concentration of the first cooker 1 and / or the second cooker 2 is greater than a first preset value. Because the cooker generates more fume when it is working, and less fume when it is not working, the first preset value may be set to an intermediate value.

[0090] like Figure 1 As shown, the range hood in this embodiment includes:

[0091] A volute 8 is disposed in the range hood body 3. A main air duct 5 is provided between the volute 8 and the range hood body 3. A main wind wheel 4 and a main motor 9 are disposed in the volute 8. The main motor 9 drives the main wind wheel 4 to rotate, so that the range hood body 3 is in a negative pressure state, thereby absorbing the oil smoke at the stove into the interior of the range hood body 3.

[0092] The exhaust pipe 10 is arranged outside the range hood body 3 and connected to the air outlet of the range hood body 3. The exhaust pipe 10 is connected to the outside world and is used to discharge the absorbed oil smoke to a public chimney or an outside space such as the outdoors;

[0093] The check valve 11 is disposed between the exhaust pipe 10 and the air outlet of the range hood body 3 to prevent the oil smoke from flowing back into the range hood body 3 .

[0094] The range hood in this embodiment is specifically a tower-type range hood. As a convertible implementation, the range hood can also be a T-type range hood or a side-suction range hood.

[0095] The smoke collecting hood 6 in this embodiment is used to cover the oil smoke floating up from the stove. Under the cover of the smoke collecting hood 6, part of the oil smoke is sucked away by the main wind wheel 4 through the main air duct 5, and the other part will crawl along the edge of the smoke collecting hood 6, overflow to the smoke cage area at the edge of the smoke collecting chamber 601, and be absorbed by the auxiliary ventilation device 7.

[0096] The range hood in this embodiment is provided with auxiliary ventilation devices 7 on both sides of the smoke hood 6. The escape path of the oil smoke can be blocked and changed under the action of the auxiliary ventilation devices 7. For example, when the first ventilation port 702 on one side blows air outward, a wind curtain can be formed on that side to block the oil smoke that may escape. In addition, under the function of the first ventilation port 702 of the auxiliary ventilation device 7 at a symmetrical position on the other side to suck air inward, the oil smoke that may escape can be effectively adsorbed into the air duct system of the range hood, thereby preventing the oil smoke from escaping and improving the smoking effect.

[0097] The complete working process of the range hood in this embodiment is as follows:

[0098] like Figure 6 As shown, when the range hood detects that the first stove 1 on the left is working, the auxiliary ventilation device 7 on the left is started to blow air outward from the first ventilation port 702 on the left to generate a wind curtain, thereby blocking the oil smoke generated by the working wok on the first stove 1 to prevent the oil smoke from spreading outwards. At the same time, the auxiliary ventilation device 7 on the right is started to suck air inward from the first ventilation port 702 on the right to absorb the sporadic oil smoke that spreads to the top of the second stove 2, and blow the sucked oil smoke to the main air duct 5 through the auxiliary air duct 701;

[0099] like Figure 7As shown, when the range hood detects that the second stove 2 on the right is working, the working tasks of the two auxiliary ventilation devices 7 on the left and right are just opposite, that is, when the second stove 2 on the right is working, the auxiliary ventilation device 7 on the right is started to blow air outward from the first ventilation port 702 on the right to generate a wind curtain to block the oil smoke generated by the working wok on the second stove 2 to prevent the oil smoke from spreading outward, and at the same time, the auxiliary ventilation device 7 on the left is started to suck air inward from the first ventilation port 702 on the left to absorb the sporadic oil smoke that spreads to the top of the first stove 1, and blow the sucked oil smoke to the main air duct 5 through the auxiliary air duct 701;

[0100] In this way, when one of the stoves is working and the other is turned off, the two auxiliary air ducts 701 on the left and right form a cycle, a positive cycle or a reverse cycle, depending on which of the left and right stoves is in working state.

[0101] However, when the range hood system detects that the stoves on both sides are working at the same time, Figure 8 As shown, the auxiliary ventilation devices 7 on the left and right sides are started to blow air to the stoves on both sides at the same time, and the first vents 702 of the left and right auxiliary ventilation devices 7 blow out wind curtains at the same time to isolate and block the oil smoke generated by the left and right stoves. The blocked oil smoke enters the main air duct 5 in the range hood body 3 through the air inlet, so as to prevent the oil smoke from overflowing and escaping.

[0102] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A range hood, suitable for being arranged above a stove, wherein the stove comprises a first stove (1) and a second stove (2), characterized in that: The range hood comprises: A range hood body (3), wherein a main wind wheel (4) and a main wind duct (5) are arranged inside the range hood body (3), wherein the main wind duct (5) comprises an air inlet and an air outlet, and the air outlet is suitable for communicating with the outside world; A smoke collecting hood (6), wherein the smoke collecting hood (6) is provided with a smoke collecting cavity (601), and the smoke collecting cavity (601) is communicated with the air inlet; At least two auxiliary ventilation devices (7), respectively arranged on at least two sides of the smoke collecting hood (6), and respectively arranged on the outer sides of the first cooker (1) and the second cooker (2), the auxiliary ventilation device (7) comprising an auxiliary air duct (701), an auxiliary wind wheel (708) being arranged in the auxiliary air duct (701), a first ventilation opening (702), a second ventilation opening (703) and a third ventilation opening (704) being arranged on the auxiliary air duct (701), the first ventilation opening (702) being connected to the smoke collecting chamber (601), a second opening and closing structure (706) being arranged at the second ventilation opening (703), the second opening and closing structure (706) being suitable for opening the second ventilation opening (703) to connect to the outside, and the third ventilation opening (704) being connected to the main air duct (5); A control device is connected to the main wind wheel (4), the auxiliary wind wheel (708) and the second opening and closing structure (706), and is suitable for controlling the main wind wheel (4) and the auxiliary wind wheel (708) to open when the first cooker (1) is working and the second cooker (2) is closed, and controlling the first ventilation port (702), the second ventilation port (703) and the third ventilation port (704) of the auxiliary ventilation device (7) corresponding to the first cooker (1) to open, so that the first ventilation port (702) corresponding to the first cooker (1) blows air outward; and controlling the first ventilation port (702) and the third ventilation port (704) of the auxiliary ventilation device (7) corresponding to the second cooker (2) to open and the second ventilation port (703) to close, so that the first ventilation port (702) corresponding to the second cooker (2) draws air inward.

2. The range hood according to claim 1, characterized in that: The range hood comprises: The first opening and closing structure (705) is arranged at the first vent (702), and the first opening and closing structure (705) is connected to the control device, and is suitable for when the range hood is working, the control device controls the first opening and closing structure (705) to open the first vent (702), and when the range hood is turned off, the control device controls the first opening and closing structure (705) to close the first vent (702).

3. The range hood according to claim 2, characterized in that: The first opening and closing structure (705) and / or the second opening and closing structure (706) include: A driving unit, fixedly connected in the auxiliary air duct (701), the driving unit being connected to the control device; The shielding part has one end connected to the driving part and is suitable for rotating under the drive of the driving part to open and close the first vent (702) and / or the second vent (703).

4. The range hood according to claim 3, characterized in that: The driving part is a motor, and the shielding part is a windshield.

5. The range hood according to claim 4, characterized in that: When the first ventilation opening (702) is opened, the wind shield extends out of the smoke collecting hood (6).

6. The range hood according to any one of claims 1 to 5, characterized in that: The range hood comprises: The third opening and closing structure (707) is arranged at the third vent (704). The third opening and closing structure (707) is connected to the control device and is suitable for controlling the third opening and closing structure (707) to close the third vent (704) when the first vent (702) blows air outwards, and controlling the third opening and closing structure (707) to open the third vent (704) when the first vent (702) draws air inwards.

7. The range hood according to any one of claims 1 to 5, characterized in that: The control device is suitable for controlling the auxiliary wind wheel (708) of the auxiliary ventilation device (7) corresponding to the first cooker (1) to rotate in a first direction so that the first ventilation opening (702) corresponding to the first cooker (1) blows air outwards; the control device controls the auxiliary wind wheel (708) of the auxiliary ventilation device (7) corresponding to the second cooker (2) to rotate in a second direction so that the first ventilation opening (702) corresponding to the second cooker (2) draws air inwards, and the first direction is opposite to the second direction.

8. The range hood according to any one of claims 1 to 5, characterized in that: The control device is suitable for controlling the main wind wheel (4) and the auxiliary wind wheel (708) to open when the first cooker (1) and the second cooker (2) are both in operation, so that the first vents (702) both blow air outwards.

9. The range hood according to any one of claims 1 to 5, characterized in that: Two auxiliary ventilation devices (7) are provided, which are respectively arranged on both sides of the smoke collecting hood (6) and are arranged in one-to-one correspondence with the first stove (1) and the second stove (2).

10. The range hood according to any one of claims 1 to 5, characterized in that: The first ventilation opening (702) is arranged at the lower end of the auxiliary air duct (701), the second ventilation opening (703) is arranged at the middle of the auxiliary air duct (701), and the third ventilation opening (704) is arranged at the upper end of the auxiliary air duct (701).

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