A smoke machine, a smoke range all-in-one machine and a smoke machine control method

Abstract

The application discloses a smoke machine, a smoke range all-in-one machine and a smoke machine control method. The smoke machine comprises an inner circulation air inlet and outlet assembly connected with a fan, and the inner circulation air inlet and outlet assembly comprises a wind curtain air outlet channel. An air inlet baffle is arranged at a smoke inlet of the wind curtain air outlet channel, and an auxiliary fan is arranged at a side wall of the wind curtain air outlet channel. After oil fume gas flows into the inner circulation air inlet and outlet assembly under the action of the fan, the oil fume gas is divided by the air inlet baffle and the auxiliary fan, so that part of the oil fume gas enters the wind curtain air outlet channel and is sprayed from the wind curtain air outlet channel to form a wind curtain. The wind curtain function can be selectively provided by the air inlet baffle and the auxiliary fan, and the oil fume suction rate and user experience are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to a range hood, a range hood and cooktop integrated unit, and a range hood control method. Background Technology

[0002] As times change, people are paying more and more attention to their quality of life. When cooking in the kitchen, the fumes produced contain many substances that are harmful to the human body. If you work in a room full of fumes for a long time, it can lead to many diseases. Therefore, range hoods are needed to filter the fumes, which puts more stringent requirements on them.

[0003] To address the problem of escaping cooking fumes, existing range hoods often incorporate air curtain devices to isolate users from the escaping fumes. However, these air curtain fans are typically separate units, requiring an auxiliary fan to be added outside the main range hood fan to achieve the air curtain function. This significantly increases equipment costs and energy consumption. Furthermore, the separate control design for the air curtain device also adds to the control burden. Summary of the Invention

[0004] This invention provides a range hood, a range hood and cooktop integrated unit, and a range hood control method to solve the problems of currently adding an auxiliary fan to achieve the air curtain function, which increases costs and equipment energy consumption, and cannot guarantee a good smoke extraction effect, thus increasing the control burden.

[0005] According to one aspect of the present invention, a range hood is provided, including an internal circulation air inlet / outlet assembly connected to a fan. The internal circulation air inlet / outlet assembly includes an air curtain outlet channel. The air curtain outlet channel has an air curtain inlet raft plate at its inlet and an auxiliary fan on its side wall. When the oily fume gas flows into the internal circulation air inlet / outlet assembly under the action of the fan, it is diverted by the air curtain inlet raft plate and the auxiliary fan, so that part of the oily fume gas enters the air curtain outlet channel and is ejected from the air curtain outlet channel to form an air curtain.

[0006] Optionally, the range hood also includes an air curtain lifting assembly fixed to the internal circulation air inlet and outlet assembly;

[0007] The air curtain lifting assembly includes an air curtain baffle and a lifting mechanism. The lifting mechanism drives the air curtain baffle to move up and down.

[0008] Optionally, the internal circulation air intake and exhaust assembly also includes an oil fume inlet channel and an air duct dividing baffle, with the air curtain outlet channel and the oil fume inlet channel separated by the air duct dividing baffle;

[0009] The range hood also includes a first oil fume monitoring sensor, which is installed in the oil fume inlet channel.

[0010] Optionally, the range hood may also include a second oil fume monitoring sensor, a wind speed sensor, and an oil fume purification module;

[0011] The second oil fume monitoring sensor and wind speed sensor are installed in the air curtain outlet channel;

[0012] The fume purification module is installed at the air outlet of the air curtain outlet channel to purify part of the oil fume gas entering the air curtain outlet channel.

[0013] Optionally, the range hood also includes an oil cup, an oil cup mounting port, and an oil cup mounting plate. The oil cup is inserted into the internal circulation air inlet and outlet assembly by pulling it out. The oil cup mounting plate is located on the underside of the oil cup.

[0014] The air curtain inlet raft plate intersects with the oil cup mounting plate on its upper side, closing the air curtain outlet channel;

[0015] The oil fume gas flows into the internal circulation air intake and exhaust assembly under the action of the fan. The auxiliary fan is then activated to make the mixed gas enter the air curtain outlet channel, so that it is sprayed out from the air curtain outlet channel to form an air curtain.

[0016] The mixed gas includes some cooking fumes and gases from the kitchen space.

[0017] Optionally, the internal circulation air intake and exhaust assembly also includes an internal circulation air outlet channel. The oil fume gas flows into the internal circulation air intake and exhaust assembly under the action of the fan and then enters the internal circulation air outlet channel. By starting the auxiliary fan, the mixed gas enters the air curtain air outlet channel, and another part of the oil fume gas is discharged outward from the internal circulation air outlet channel.

[0018] Optionally, after the oily fumes flow into the internal circulation air intake and exhaust components under the action of the fan, the inlet area of ​​the air curtain outlet channel is adjusted by rotating the air curtain inlet raft plate. At the same time, the auxiliary fan is started to divert the flow, so that some of the oily fumes enter the air curtain outlet channel and are sprayed out from the air curtain outlet channel to form an air curtain.

[0019] According to another aspect of the present invention, a range hood and cooktop integrated unit is provided, which includes a cooktop and a range hood according to any embodiment of the present invention.

[0020] According to another aspect of the present invention, a range hood control method is provided, applied to a range hood as described in any embodiment of the present invention, the range hood control method comprising:

[0021] Obtain the current oil fume concentration in the oil fume inlet channel of the range hood;

[0022] The auxiliary fan installed on the side wall of the air curtain outlet channel is activated and / or the air curtain inlet raft plate installed at the smoke inlet of the air curtain outlet channel is rotated according to the current oil fume concentration, so as to adjust the air curtain speed formed by the air curtain sprayed from the air curtain outlet channel of the internal circulation air intake and exhaust assembly.

[0023] Optionally, before obtaining the current oil fume concentration of the range hood, the following may also be included:

[0024] After the range hood is started, obtain the current speed setting of the range hood;

[0025] Determine the current position of the corresponding air curtain baffle based on the current gear, and control the lifting mechanism to adjust the air curtain baffle to the current position.

[0026] Optionally, after obtaining the current oil fume concentration of the range hood, the following may also be included:

[0027] If the current oil fume concentration is less than or equal to the first preset oil fume concentration, then control the air curtain baffle to remain in the current position;

[0028] If the current oil fume concentration is greater than the first preset oil fume concentration and the current oil fume concentration is less than or equal to the second preset oil fume concentration, then control the lifting mechanism to raise the air curtain baffle from the current position to the first target position;

[0029] If the current oil fume concentration is greater than the second preset oil fume concentration, the lifting mechanism is controlled to lift the air curtain baffle from the current position to the second target position. At the same time, it is determined whether the current oil fume concentration is greater than the third preset oil fume concentration, so as to adjust the speed of the air curtain formed by the air curtain outlet channel in the internal circulation air intake and exhaust assembly.

[0030] Among them, the upward extension height of the air curtain baffle corresponding to the first target position and the second target position is greater than the upward extension height of the air curtain baffle corresponding to the current position, the first preset oil fume concentration is less than the second preset oil fume concentration, and the second preset oil fume concentration is less than the third preset oil fume concentration.

[0031] Optionally, based on the current oil fume concentration, the auxiliary fan installed on the side wall of the air curtain outlet channel and / or the air curtain inlet raft plate installed at the smoke inlet of the air curtain outlet channel may be activated, including:

[0032] If the current oil fume concentration is greater than the third preset oil fume concentration, rotate the air curtain inlet raft plate set at the smoke inlet of the air curtain outlet channel, and at the same time start the auxiliary fan set on the side wall of the air curtain outlet channel.

[0033] If the current oil fume concentration is less than or equal to the third preset oil fume concentration, the auxiliary fan installed on the side wall of the air curtain outlet channel will be activated.

[0034] Optionally, the range hood control method also includes:

[0035] Obtain the oil fume concentration and air velocity at the air curtain outlet of the range hood;

[0036] If the wind speed at the air curtain outlet reaches the preset wind speed threshold, the fume purification module will be turned on, and the power of the fume purification module will be adjusted according to the fume concentration at the air curtain outlet.

[0037] If the wind speed at the air curtain outlet does not reach the preset wind speed threshold, the power of the auxiliary fan will be increased to enhance the wind speed of the air curtain formed by the air curtain ejected from the air curtain outlet channel.

[0038] Optionally, the power of the fume purification module can be adjusted based on the concentration of oil fumes at the air curtain outlet, including:

[0039] If the oil fume concentration at the air curtain outlet is greater than the fourth preset oil fume concentration, the power of the oil fume purification module will be increased.

[0040] If the oil fume concentration at the air curtain outlet is less than or equal to the fourth preset oil fume concentration, the oil fume concentration of the range hood will continue to be detected.

[0041] Optionally, the range hood control method also includes:

[0042] After the air curtain baffle is raised to the first target position, or after the air curtain baffle is kept in the current position, the oil fume concentration of the range hood will continue to be detected.

[0043] Optionally, the range hood control method also includes:

[0044] When the range hood receives a shutdown command, or when the current oil fume concentration of the range hood is less than the oil fume concentration limit, the range hood will be controlled to shut down after a set delay period.

[0045] The technical solution of this invention includes a range hood comprising an internal circulation air inlet / outlet assembly connected to a fan. The internal circulation air inlet / outlet assembly includes an air curtain outlet channel. An air curtain inlet raft is provided at the smoke inlet of the air curtain outlet channel, and an auxiliary fan is provided on the side wall of the air curtain outlet channel to enhance the air curtain effect and improve smoke extraction efficiency. Furthermore, after the oily fumes flow into the internal circulation air inlet / outlet assembly under the action of the fan, they are diverted by the air curtain inlet raft and the auxiliary fan, allowing some of the oily fumes to enter the air curtain outlet channel and be ejected from the air curtain outlet channel to form an air curtain. This achieves air curtain speed regulation, significantly improving the oil fume extraction rate and user experience.

[0046] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a structural schematic diagram of a range hood and cooktop integrated unit according to an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of the internal circulation flow of oil fumes and a partial cross-section of an integrated range hood and stove according to an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of adjusting the smoke inlet area of ​​the air curtain outlet channel according to an embodiment of the present invention.

[0051] Figure 4 This is a schematic diagram of adjusting the smoke inlet area of ​​the air curtain outlet channel according to an embodiment of the present invention.

[0052] Figure 5 This is a schematic flowchart of a smoke machine control method according to an embodiment of the present invention;

[0053] Figure 6 This is a schematic flowchart of a smoke machine control method according to an embodiment of the present invention;

[0054] Figure 7 This is a schematic flowchart of a smoke machine control method according to an embodiment of the present invention;

[0055] in:

[0056] 101 - Air curtain baffle; 102 - Lifting mechanism;

[0057] 200-Internal circulation air inlet and outlet assembly, 201-Air curtain inlet raft plate, 2011-Rotating shaft, 2012-Oil cup mounting plate, 2013-Auxiliary fan, 202-Air curtain outlet channel, 2021-Air curtain outlet guide net, 203-Fume inlet channel, 204-Air duct dividing baffle, 205-Internal circulation outlet channel, 2051-Guide filter net, 206-Internal circulation filter mechanism, 207-Filter assembly first limit baffle;

[0058] 300-Fan, 301-Guide ring, 302-Impeller, 303-Volume and its noise reduction components, 304-Drive motor, 3031-Connecting flange;

[0059] 401 - Oil fume filter;

[0060] 510 - First oil fume monitoring sensor; 520 - Wind speed sensor; 530 - Oil fume purification module;

[0061] 600 - Oil fume gas; 601 - Mixed gas entering the air curtain outlet channel 202; 602 - Part of the oil fume gas entering the internal circulation outlet channel 205.

[0062] 701 - Outer shell, 702 - Induction cooker, 7021 - Glass panel, 7022 - Heating surface area of ​​induction cooker. Detailed Implementation

[0063] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0064] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0065] Figure 1 This is a structural schematic diagram of an integrated range hood and cooktop provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the internal circulation flow of oil fumes and a partial cross-section of an integrated range hood and stove provided in an embodiment of the present invention. Figure 3 and Figure 4 This is a schematic diagram of the smoke inlet area adjustment of the air curtain outlet channel provided in this embodiment of the invention. This embodiment can be applied to the situation where the integrated range hood and stove share the same fan to achieve the air curtain effect.

[0066] like Figures 1 to 4As shown, the range hood includes an internal circulation air inlet / outlet assembly 200 connected to a fan 300. The internal circulation air inlet / outlet assembly 200 includes an air curtain outlet channel 202. The air curtain outlet channel 202 has an air curtain inlet raft 201 at its inlet and an auxiliary fan 2013 on its side wall. When the oily fumes flow into the internal circulation air inlet / outlet assembly 200 under the action of the fan 300, they are diverted by the air curtain inlet raft 201 and the auxiliary fan 2013, so that some of the oily fumes enter the air curtain outlet channel 202 and are ejected from the air curtain outlet channel 202 to form an air curtain.

[0067] The air curtain inlet raft plate 201 is rotated up and down via a rotating shaft 2011, thereby adjusting the smoke inlet area of ​​the air curtain outlet channel 202.

[0068] Specifically, the range hood also includes an oil cup, an oil cup mounting port, and an oil cup mounting plate 2012. The oil cup is inserted into the internal circulation air inlet / outlet assembly 200 via a pull-out mechanism. The oil cup mounting plate 2012 is located below the oil cup. See also... Figure 2 and Figure 3 As shown, the air curtain inlet raft plate 201 intersects with the oil cup mounting plate 2012 on its upper side, preventing the oil fume gas from entering the air curtain outlet channel 202. The air curtain outlet channel 202 is in a closed state. In this embodiment, the air curtain inlet raft plate 201 is not used to provide an air curtain. That is, in one embodiment, after the oil fume gas flows into the internal circulation inlet and outlet air assembly under the action of the fan, only the auxiliary fan 2013 is activated to allow the mixed gas 601 to enter the air curtain outlet channel 202, so that it is ejected from the air curtain outlet channel 202 to form an air curtain. The mixed gas 601 includes a portion of the oil fume gas 602 and kitchen space gas.

[0069] See also Figures 1 to 4 As shown, when only the auxiliary fan 2013 is activated to provide the air curtain, the internal circulation air inlet and outlet assembly 200 also includes an internal circulation air outlet channel 205. The oil fume gas flows into the internal circulation air inlet and outlet assembly 200 under the action of the fan 300 and then enters the internal circulation air outlet channel 205. By activating the auxiliary fan 2013, the mixed gas 601 enters the air curtain air outlet channel 202. Since the mixed gas 601 includes part of the oil fume gas 602, the other part of the oil fume gas is discharged outward from the internal circulation air outlet channel 205.

[0070] Among them, a flow guide filter 2051 is installed in the internal circulation air outlet channel 205. The flow guide filter 2051 is responsible for preventing foreign objects from entering and guiding the gas to be discharged.

[0071] In another embodiment, the air curtain is adjusted in coordination with the air curtain inlet raft plate 201 and the auxiliary fan 2013. Specifically, after the oil fume gas flows into the internal circulation air inlet and outlet assembly 200 under the action of the fan 300, the inlet area of ​​the air curtain outlet channel 202 is adjusted by rotating the air curtain inlet raft plate 201. At the same time, the auxiliary fan 2013 is started to divert the flow. At this time, part of the oil fume gas 602 entering the internal circulation outlet channel 205 is divided into two parts. Part of the oil fume gas 602 mixes with the gas in the kitchen space to obtain mixed gas 601, which enters the air curtain outlet channel 202. The other part of the oil fume gas 602 enters the air curtain outlet channel 202 through the air curtain inlet raft plate 201, so as to be sprayed out from the air curtain outlet channel 202 to form an air curtain.

[0072] See also Figure 1 and Figure 4 As shown, the range hood also includes an air curtain lifting assembly fixed on the internal circulation air inlet and outlet assembly 200; the air curtain lifting assembly includes an air curtain baffle 101 and a lifting mechanism 102, the lifting mechanism 102 drives the air curtain baffle 101 to move up and down.

[0073] Based on the above, the fan 300 and the internal circulation inlet / outlet air assembly 200 are connected to the volute outlet flange via connecting flange 3031 using bolts or other mechanical means. The fan is basically the same as the fan in a conventional smoke hood, so please refer to [link to relevant documentation]. Figure 1 As shown, the fan 300 also includes components such as a guide ring 301, an impeller 302, a volute and its noise reduction assembly 303, and a drive motor 304, which will not be described in detail in this embodiment.

[0074] See also Figure 1 As shown, the air curtain lifting assembly is placed below the fume filter 401. The fume filter 401 can be a metal mesh, which can have diamond or leaf-shaped metal holes, and different mesh counts can be selected. The metal mesh can also be made of materials such as galvanized sheet, aluminum alloy, or stainless steel. This embodiment does not impose any restrictions on this.

[0075] The lifting height of the air curtain lifting assembly is controllable, meaning it can be controlled by the internal control program of the lifting mechanism 102. The lifting mechanism 102 is connected and fixed to the internal circulation air intake and exhaust assembly 200 by screws or other connection methods. The air curtain baffle limiting mechanism is connected to the lifting mechanism 102, and under the action of the lifting mechanism 102, it drives the air curtain baffle 101 to move up and down, thereby controlling the raising and lowering of the air curtain baffle 101.

[0076] Based on the above, please continue to refer to Figure 3 and Figure 4As shown, the internal circulation air intake and exhaust assembly 200 also includes an internal circulation filter mechanism 206, a first limiting baffle 207 for the filter assembly, and a second limiting baffle for the filter assembly. The internal circulation filter mechanism 206 is located in front of the air curtain guide plate 201. The first limiting baffle 207 for the filter assembly is used to limit the left and right position of the internal circulation filter mechanism 206, and the second limiting baffle for the filter assembly is used to limit the up and down position of the internal circulation filter mechanism 206. A noise reduction hole is provided on the lower side of the second limiting baffle for the filter assembly. During installation, noise reduction cotton can also be attached to the lower side of the noise reduction hole to absorb the aerodynamic noise generated by the oil fume gas passing through the internal circulation filter mechanism 206.

[0077] The internal circulation filtration mechanism 206 can be a honeycomb carbon filter component, or a metal filter, ceramic filter, etc. Preferably, the internal circulation filtration mechanism 206 can be a block honeycomb carbon filter component composed of waterproof activated carbon. The internal circulation filtration mechanism 206 can adsorb oil fume particles and remove oil fume odors.

[0078] See also Figures 1 to 4 As shown, the internal circulation air intake and exhaust assembly 200 also includes an oil fume inlet channel 203 and an air duct dividing baffle 204. The air curtain outlet channel 202 and the oil fume inlet channel 203 are separated by the air duct dividing baffle 204 to form two channels.

[0079] Based on the above, the range hood also includes a first oil fume monitoring sensor 510, which is installed in the oil fume inlet channel 203 to monitor the oil fume concentration and flow rate at that point in real time. Optionally, the first oil fume monitoring sensor 510 can be implemented using an existing oil fume monitoring sensor.

[0080] Furthermore, the range hood also includes a second oil fume monitoring sensor, a wind speed sensor 520, and an oil fume purification module 530; the second oil fume monitoring sensor and the wind speed sensor 520 are both installed in the air curtain outlet channel 202; the oil fume purification module 530 is installed at the outlet of the air curtain outlet channel 202 and is used to purify part of the oil fume gas entering the air curtain outlet channel 202.

[0081] The second oil fume monitoring sensor is used to monitor the oil fume concentration at this point in real time, that is, the second oil fume monitoring sensor detects the oil fume concentration at the air curtain outlet in real time, and the wind speed sensor is used to detect the oil fume flow rate at this point in real time, that is, the wind speed sensor detects the wind speed at the air curtain outlet.

[0082] The fume purification module 530 is used to purify the fume gas at the second fume monitoring sensor and wind speed sensor 520 set in the air curtain outlet channel 202. The fume purification module 530 can be implemented using a negative ion carbon brush head. For example, the fume purification module 530 adjusts the power of the negative ion generator according to the detected fume concentration at that point, and generates negative ions through the negative ion carbon brush head to combine with the fume and purify the fume.

[0083] See also Figure 2 and Figure 3 The illustrated oil fume flow is as follows: when the stove is heated during cooking, oil fume gas 600 is generated. Under the action of the fan 300, the oil fume gas 600 flows from the oil fume filter 401 into the oil fume inlet channel 203, and is then sucked into the fan. Subsequently, under the action of centrifugal force, it flows into the internal circulation inlet and outlet air assembly 200. At this time, the air curtain inlet raft 201 is in the closed state, that is, the auxiliary fan 2013 is used to provide the air curtain alone. Part of the oil fume gas 602 enters the internal circulation outlet channel 205. By starting the auxiliary fan 2013, the mixed gas 601 enters the air curtain outlet channel 202, and the other part of the oil fume gas is discharged to the indoor space.

[0084] See also Figure 2 and Figure 4 The illustrated oil fume flow diagram shows that when the stove is heated during cooking, oil fume gas 600 is generated. Under the action of the fan 300, the oil fume gas 600 flows from the oil fume filter 401 into the oil fume inlet channel 203, and is then drawn into the fan. Subsequently, under the action of centrifugal force, it flows into the internal circulation inlet / outlet air assembly 200. At this time, the air curtain inlet raft 201 is in the open state, i.e. Figure 2 The position of the inlet raft plate 201 of the wind curtain can be adjusted to Figure 4 As can be seen, the position of the air curtain inlet raft plate 201 can be adjusted in real time according to the oil fume concentration. This embodiment does not impose any special restrictions on its specific position.

[0085] Furthermore, by coordinating the adjustment of the air curtain by the air curtain inlet raft 201 and the auxiliary fan 2013, some of the oil fume gas 602 enters the internal circulation air outlet channel 205. Since the air curtain inlet raft 201 is in the open state, a portion of the oil fume gas 602 enters the air curtain outlet channel 202. At the same time, the auxiliary fan 2013 is activated to mix another portion of the oil fume gas 602 with the gas in the kitchen space to obtain mixed gas 601, which enters the air curtain outlet channel 202. Then, a portion of the oil fume gas 602 and the mixed gas 601 move upward along the air curtain outlet channel 202, are ejected through the air curtain outlet guide net 2021, and move along the air curtain baffle 101, forming a negative pressure on the right side of the top of the air curtain baffle 101 to suppress the escape of oil fumes. On the basis of the above, another portion of the oil fume gas enters the internal circulation air outlet channel 205 and is discharged as purified internal circulation gas into the indoor space.

[0086] Based on the same inventive concept, embodiments of the present invention also provide an integrated range hood and cooktop, which includes a cooktop and a range hood according to any embodiment of the present invention.

[0087] Based on the above, please continue to refer to Figures 1 to 4 The integrated range hood and cooktop shown also includes a housing 701. For example, taking an induction cooktop as an example, the induction cooktop 702 includes a glass panel 7021 and an induction cooktop heating surface area 7022. The induction cooktop 702 is installed on the upper side of the upper partition plate of the smoke inlet cavity and is connected by screws or other means, and is embedded inside the housing 701.

[0088] The integrated range hood and cooktop provided in this embodiment of the invention includes a range hood, which includes an internal circulation air inlet / outlet assembly connected to a fan. The internal circulation air inlet / outlet assembly includes an air curtain outlet channel. The air curtain outlet channel has an air curtain inlet raft plate at its inlet and an auxiliary fan on its side wall to enhance the air curtain effect and improve smoke extraction efficiency. Furthermore, after the oily fumes flow into the internal circulation air inlet / outlet assembly under the action of the fan, they are diverted by the air curtain inlet raft plate and the auxiliary fan, allowing some of the oily fumes to enter the air curtain outlet channel and be ejected from the air curtain outlet channel to form an air curtain. This achieves air curtain speed regulation, significantly improving the oil fume extraction rate and user experience.

[0089] Based on the same inventive concept Figure 5 This invention provides a flowchart of a range hood control method, applicable to range hoods as described in any embodiment of the invention. Figure 5 As shown, the control method for the range hood includes:

[0090] S110. Obtain the current oil fume concentration of the range hood.

[0091] As those skilled in the art will know, a range hood can be set to multiple operating levels to meet the user's emission needs for oil fumes generated in different cooking situations. For example, it can be set to multiple operating levels such as stir-fry, strong, and weak. It is also understood that the oil fume concentration of the range hood is different under these three operating levels, and the air curtain baffle is adjusted to different positions accordingly.

[0092] Based on this, after the range hood is started, the current gear of the range hood is obtained. The current gear can be the gear input by the range hood user, or it can be the gear determined automatically based on the linkage between the range hood and the stove. This embodiment does not impose any restrictions on this.

[0093] Furthermore, the current position of the corresponding air curtain baffle is determined based on the current gear setting, and the lifting mechanism is controlled to adjust the air curtain baffle to the current position. For example, if the current gear setting is low, the amount of oil fumes is small, and the current position of the corresponding air curtain baffle can be at a lower height to meet the oil fume absorption requirements. If the current gear setting is high-heat setting, the amount of oil fumes is large, and due to the increase in the current gear setting, the current position of the corresponding air curtain baffle is raised to a higher height.

[0094] S120. Based on the current oil fume concentration, start the auxiliary fan installed on the side wall of the air curtain outlet channel and / or rotate the air curtain inlet raft plate installed at the smoke inlet of the air curtain outlet channel to adjust the air curtain speed formed by the air curtain sprayed from the air curtain outlet channel in the internal circulation air intake and exhaust assembly.

[0095] Based on the above, by real-time monitoring of the current oil fume concentration, the position of the air curtain baffle is adjusted in real time according to the changes in oil fume concentration, effectively suppressing the escape of oil fumes. Specifically, the current oil fume concentration is compared with the first preset oil fume concentration and the second preset oil fume concentration to determine whether to adjust the position of the air curtain baffle.

[0096] The first preset oil fume concentration and the second preset oil fume concentration can be preset by those skilled in the art according to the adjustment requirements of the air curtain baffle and the corresponding relationship with the oil fume concentration. Different integrated range hood and stove can preset different first preset oil fume concentrations and second preset oil fume concentrations. In this embodiment, no special restrictions are placed on the specific values ​​of the first preset oil fume concentration and the second preset oil fume concentration.

[0097] Specifically, if the current oil fume concentration is less than or equal to the first preset oil fume concentration, meaning the amount of oil fume is relatively small, keeping the air curtain baffle in its current position is sufficient to suppress oil fume escape. Simultaneously, there is no need to activate the air curtain to enhance the smoke extraction effect; therefore, there is no need to activate the auxiliary fan or open the air curtain inlet raft. The air curtain inlet raft is in the closed state at this time. Figure 2 and Figure 3 The location of the air curtain inlet raft plate 201 is shown.

[0098] If the current oil fume concentration is greater than the first preset oil fume concentration, considering the large amount of oil fume, in order to meet the requirements for oil fume absorption and further suppress oil fume escape, the current oil fume concentration is compared with the second preset oil fume concentration. Specifically, if the current oil fume concentration is less than or equal to the second preset oil fume concentration (i.e., the current oil fume concentration is greater than the first preset oil fume concentration but less than or equal to the second preset oil fume concentration), the lifting mechanism is controlled to raise the air curtain baffle from its current position to the first target position. That is, by raising the position of the air curtain baffle, the lateral escape of oil fume gas is prevented.

[0099] Furthermore, if the current oil fume concentration is greater than the second preset oil fume concentration, the lifting mechanism is controlled to raise the air curtain baffle from its current position to the second target position, that is, to further raise the position of the air curtain baffle. At the same time, it is determined whether the current oil fume concentration is greater than the third preset oil fume concentration. Based on the result of the determination that it is greater than the third preset oil fume concentration, the air curtain speed formed by the air curtain outlet channel in the internal circulation air intake and exhaust component is adjusted accordingly. That is, at this time, raising the position of the air curtain baffle is no longer sufficient to absorb oil fumes. The appropriate method can be selected to provide the air curtain function by combining the comparison between the current oil fume concentration and the third preset oil fume concentration.

[0100] Specifically, if the current oil fume concentration is less than or equal to the third preset oil fume concentration, although the amount of oil fume is also relatively large, the smoke extraction effect can be achieved simply by activating the auxiliary fan installed on the side wall of the air curtain outlet channel. In other words, the air curtain function is provided by the auxiliary fan, thus saving energy.

[0101] If the current oil fume concentration is greater than the third preset oil fume concentration, it indicates that the amount of oil fume is large. In this case, the auxiliary fan installed on the side wall of the air curtain outlet channel will be activated, and the air curtain inlet raft plate installed at the smoke inlet of the air curtain outlet channel will be rotated. The air curtain inlet raft plate will be in the open state to increase the area of ​​the smoke inlet of the air curtain outlet channel. Correspondingly, the air curtain velocity formed by the air curtain ejected from the air curtain outlet channel will increase, allowing some oil fume gas to enter the air curtain outlet channel and be ejected from the air curtain outlet channel to form an air curtain. That is, the auxiliary fan and the air curtain inlet raft plate work together to provide the air curtain function, so as to further improve the smoke extraction effect.

[0102] As is known, the air curtain speed can be adjusted by changing the position of the air curtain inlet raft plate, as will be discussed in the following section. Figure 2 The location of the air curtain inlet raft plate 201 shown has been adjusted to refer to [reference needed]. Figure 4 The air curtain inlet raft plate 201 is shown at the location of the air curtain inlet raft plate. At this time, the air curtain inlet raft plate is in the open state to increase the area of ​​the smoke inlet of the air curtain outlet channel. The corresponding air curtain velocity of the air curtain formed by the air curtain outlet channel increases, which allows some oil fume gas to enter the air curtain outlet channel and be ejected from the air curtain outlet channel to form an air curtain.

[0103] It should be noted that, in order to meet different oil fume absorption conditions, the position of the air curtain inlet raft plate can be adjusted in real time.

[0104] Among them, the upward extension height of the air curtain baffle corresponding to the first target position and the second target position is greater than the upward extension height of the air curtain baffle corresponding to the current position, the first preset oil fume concentration is less than the second preset oil fume concentration, and the second preset oil fume concentration is less than the third preset oil fume concentration.

[0105] Based on the above, by simply starting the auxiliary fan, or by coordinating the adjustment of the auxiliary fan and the air curtain inlet raft, the concentration of oil fumes at the air curtain outlet and the air velocity at the air curtain outlet of the range hood can be further obtained to purify the air curtain formed by the air sprayed out from the air curtain outlet, thereby further achieving the effect of purifying the air entering the room.

[0106] Specifically, after starting only the auxiliary fan, or coordinating the adjustment of the auxiliary fan and the air curtain inlet raft, if the obtained air velocity at the air curtain outlet reaches the preset air velocity threshold, the fume purification module is activated. Furthermore, the power of the fume purification module is adjusted based on the fume concentration at the air curtain outlet. That is, if the fume concentration at the air curtain outlet is greater than the fourth preset fume concentration, the power of the fume purification module is increased to purify the fume concentration and prevent a high fume concentration in the mixture of gas entering from the air curtain inlet raft and gas drawn in by the auxiliary fan inlet; if the fume concentration at the air curtain outlet is less than or equal to the fourth preset fume concentration, the fume concentration of the range hood continues to be monitored.

[0107] The fourth preset oil fume concentration can be preset by those skilled in the art according to the power adjustment requirements of the oil fume purification module and the corresponding relationship with the oil fume concentration. Different integrated range hoods and stoves can preset different fourth preset oil fume concentrations. This embodiment does not impose any special restrictions on the specific value of the fourth preset oil fume concentration.

[0108] Furthermore, if the wind speed at the air curtain outlet does not reach the preset wind speed threshold after only starting the auxiliary fan or coordinating the adjustment of the auxiliary fan and the air curtain inlet raft, the power of the auxiliary fan is increased to enhance the wind speed of the air curtain formed by the air curtain ejected from the air curtain outlet channel. The wind speed at the air curtain outlet is also monitored to achieve real-time control of the auxiliary fan and ensure the smoke extraction effect.

[0109] As can be seen, in order to flexibly adjust the air curtain speed in real time to meet different oil fume absorption conditions, after the air curtain baffle is raised to the first target position, or after the air curtain baffle is kept in the current position, the oil fume concentration of the range hood continues to be detected. Then, based on the detected oil fume concentration, the positions of the air curtain baffle and the air curtain inlet raft plate are adjusted in real time. The air curtain function is provided by relying on the auxiliary fan or by coordinating the auxiliary fan and the air curtain inlet raft plate to ensure the smoke extraction effect.

[0110] If the range hood receives a shutdown command during the above process, or if the current oil fume concentration of the range hood is less than the oil fume concentration limit, the range hood will be controlled to shut down after a set delay period.

[0111] The oil fume concentration limit is the minimum preset value of oil fume concentration. At this point, the range hood can be turned off without extracting the oil fumes. The oil fume concentration limit can be uniformly set by industry standards, or it can be selected and set by the range hood user or those skilled in the art. That is, the oil fume concentration limit can be different for different range hood and stove integrated units. This embodiment does not impose any special restrictions on this.

[0112] Similarly, the set time length can be uniformly defined by industry standards, or it can be selected and set by the range hood user or those skilled in the art. That is, the set time length can be different for different range hood and cooktop integrated units. This embodiment does not impose any special restrictions on this. Optionally, the set time length can be 3 minutes or 5 minutes.

[0113] Furthermore, after the smoke hood is turned off, the control lifting mechanism lowers the air curtain baffle until it is fully retracted to protect the air curtain baffle and increase its service life. Simultaneously, the air curtain inlet raft is adjusted as follows: Figure 2 and Figure 3 The system is in the off state as shown, and the auxiliary fan remains off.

[0114] The technical solution of this invention involves obtaining the current oil fume concentration of the range hood; and, based on the current oil fume concentration, activating an auxiliary fan installed on the side wall of the air curtain outlet channel and / or rotating the air curtain inlet raft plate installed at the smoke inlet of the air curtain outlet channel to adjust the air curtain speed formed by the air curtain ejected from the air curtain outlet channel in the internal circulation air intake and exhaust assembly. This invention, through the air curtain inlet raft plate and auxiliary fan, can selectively provide an air curtain function, significantly improving the oil fume absorption rate and user experience.

[0115] Based on the same inventive concept Figure 6 This is a flowchart of a range hood control method provided by an embodiment of the present invention. Based on the above embodiments, this embodiment provides an optional implementation method. For example... Figure 6 As shown, the control method for the range hood includes:

[0116] S210. After the range hood is started, obtain the current gear of the range hood.

[0117] S211. Determine the current position of the corresponding air curtain baffle based on the current gear, and control the lifting mechanism to adjust the air curtain baffle to the current position.

[0118] S212. Obtain the current oil fume concentration of the range hood.

[0119] S213. Determine whether the current oil fume concentration is greater than the first preset oil fume concentration. If yes, proceed to step S214; otherwise, proceed to step S215.

[0120] Specifically, if the current oil fume concentration is greater than the first preset oil fume concentration, then step S214 is executed to continue comparing the current oil fume concentration with the second preset oil fume concentration. The first preset oil fume concentration is less than the second preset oil fume concentration, and the second preset oil fume concentration is less than the third preset oil fume concentration.

[0121] If the current oil fume concentration is less than or equal to the first preset oil fume concentration, then step S215 is executed, indicating that the oil fume concentration is low and the air curtain does not need to be considered. At this time, the smoke extraction effect already meets the current oil fume concentration state, so it is not necessary to open the air curtain inlet raft 201 and maintain the air curtain inlet raft 201 in the position as shown. Figure 3 The system is in the off state as shown. At the same time, the auxiliary fan remains off, and the concentration of oil fumes continues to be monitored.

[0122] S214. Determine whether the current oil fume concentration is greater than the second preset oil fume concentration. If yes, proceed to step S216; otherwise, proceed to step S217.

[0123] Specifically, if the current oil fume concentration is greater than the second preset oil fume concentration, then step S216 is executed, controlling the lifting mechanism to lift the air curtain baffle from the current position to the second target position, and activating the air curtain function, that is, simultaneously determining whether the current oil fume concentration is greater than the third preset oil fume concentration, so as to adjust the air curtain speed formed by the air curtain outlet channel in the internal circulation air intake and exhaust assembly.

[0124] If the current oil fume concentration is less than or equal to the second preset oil fume concentration, then step S217 is executed to control the lifting mechanism to lift the air curtain baffle from the current position to the first target position to prevent the oil fume from escaping laterally.

[0125] Among them, the upward extension height of the wind curtain baffle corresponding to the first target position and the second target position is greater than the upward extension height of the wind curtain baffle corresponding to the current position, and the upward extension height of the wind curtain baffle corresponding to the first target position is lower than the upward extension height of the wind curtain baffle corresponding to the second target position.

[0126] S215. Control the air curtain baffle to remain in its current position.

[0127] S216. Control the lifting mechanism to raise the air curtain baffle from the current position to the second target position.

[0128] Specifically, when the current oil fume concentration is greater than the second preset oil fume concentration, after the control lifting mechanism drives the air curtain baffle to rise from the current position to the second target position, step S218 is executed to further compare the current oil fume concentration with the third preset oil fume concentration to adjust the air curtain speed.

[0129] S217. Control the lifting mechanism to raise the air curtain baffle from its current position to the first target position.

[0130] S218. Determine whether the current oil fume concentration is greater than the third preset oil fume concentration. If yes, proceed to step S219; otherwise, proceed to step S220.

[0131] Specifically, if the current oil fume concentration is greater than the third preset oil fume concentration, then step S219 is executed to coordinate the adjustment of the air curtain inlet raft plate and the auxiliary fan. That is, the air curtain inlet raft plate set at the smoke inlet of the air curtain outlet channel is rotated, the air curtain inlet raft plate is opened, and the air curtain inlet raft plate is controlled to flip downward to increase the air curtain speed and meet the greater oil fume absorption required by the range hood at this time.

[0132] If the current oil fume concentration is less than or equal to the third preset oil fume concentration, then step S220 is executed, that is, the air curtain inlet raft plate is controlled to intersect with the oil cup mounting plate on its upper side, and the air curtain inlet raft plate 201 is in the position as shown. Figure 3 The off state shown indicates that only the auxiliary fan is activated to provide an air curtain.

[0133] S219. Rotate the air curtain inlet raft plate located at the smoke inlet of the air curtain outlet channel, and simultaneously start the auxiliary fan located on the side wall of the air curtain outlet channel.

[0134] S220. Start the auxiliary fan installed on the side wall of the air curtain outlet channel.

[0135] S221. Obtain the oil fume concentration and air velocity at the air curtain outlet of the range hood.

[0136] S222. Determine whether the wind speed at the air curtain outlet has reached the preset wind speed threshold. If yes, proceed to step S223; otherwise, proceed to step S224.

[0137] The preset wind speed threshold can be selected and set according to the wind speed requirements of the air curtain. In this embodiment, its specific value is not specially limited.

[0138] Specifically, when the wind speed at the air curtain outlet reaches the preset wind speed threshold, step S223 is executed to activate the fume purification module. The fume at the air curtain outlet is purified by adjusting the power of the fume purification module to prevent the fume concentration at this location from becoming too high.

[0139] If the wind speed at the air curtain outlet does not reach the preset wind speed threshold, then step S224 is executed. The wind speed of the air curtain formed by the air curtain is increased by simply increasing the power of the auxiliary fan, thus achieving wind curtain wind speed control. This ensures the smoke extraction effect while effectively suppressing the escape of oil fumes.

[0140] S223, Turn on the fume purification module.

[0141] S224. Increase the power of the auxiliary fan to enhance the wind speed of the air curtain formed by the air curtain outlet channel.

[0142] Specifically, after increasing the power of the auxiliary fan, the concentration of oil fumes at the air curtain outlet and the air velocity at the air curtain outlet in the smoke fan are obtained, and then the process returns to step S221 to repeat the above control process.

[0143] S225. Determine whether the oil fume concentration at the air curtain outlet is greater than the fourth preset oil fume concentration. If yes, proceed to step S226; otherwise, proceed to step S227.

[0144] Specifically, if the oil fume concentration at the air curtain outlet is greater than the fourth preset oil fume concentration, then step S226 is executed. That is, if the oil fume concentration is too high, the power of the oil fume purification module needs to be further increased to purify the oil fume at the air curtain outlet and ensure the smoke extraction effect.

[0145] If the oil fume concentration at the air curtain outlet is less than or equal to the fourth preset oil fume concentration, then step S227 is executed. The current oil fume purification module power is sufficient to purify the oil fume at the air curtain outlet, and no further power adjustment is required.

[0146] S226. Increase the power of the fume purification module.

[0147] S227. Continue to monitor the oil fume concentration of the range hood.

[0148] Specifically, after the air curtain baffle is raised to the first target position, or after the air curtain baffle is kept in the current position, the oil fume concentration of the range hood continues to be detected. The oil fume concentration obtained again is compared with the first preset oil fume concentration and the second preset oil fume concentration, and the process returns to step S212 to repeat the above range hood control process.

[0149] Based on the same inventive concept Figure 7 This is a flowchart of a range hood control method provided by an embodiment of the present invention. Based on the above embodiments, this embodiment determines the current position of the corresponding air curtain baffle based on the current setting of the range hood, thereby satisfying the absorption of cooking fumes at the current setting. When the range hood receives a shutdown command, or when the current concentration of cooking fumes in the range hood is less than the limit, the range hood can be shut down, providing an optional implementation method. For example... Figure 7 As shown, the control method for the range hood includes:

[0150] S310. After the range hood is started, obtain the current gear of the range hood.

[0151] S320: Determine the current position of the corresponding air curtain baffle based on the current gear, and control the lifting mechanism to adjust the air curtain baffle to the current position.

[0152] S330: Obtain the current oil fume concentration of the range hood.

[0153] S340. Based on the current oil fume concentration, start the auxiliary fan installed on the side wall of the air curtain outlet channel and / or rotate the air curtain inlet raft plate installed at the smoke inlet of the air curtain outlet channel to adjust the air curtain speed formed by the air curtain sprayed from the air curtain outlet channel in the internal circulation air intake and exhaust assembly.

[0154] Specifically, if the current oil fume concentration is greater than the third preset oil fume concentration, the air curtain inlet raft plate set at the smoke inlet of the air curtain outlet channel will be rotated, and the auxiliary fan set on the side wall of the air curtain outlet channel will be started at the same time. That is, the auxiliary fan and the air curtain inlet raft plate will be coordinated to adjust the air curtain speed, thereby meeting the smoke extraction needs of the smoke machine.

[0155] If the current oil fume concentration is less than or equal to the third preset oil fume concentration, the auxiliary fan installed on the side wall of the air curtain outlet channel will be activated. That is, only the auxiliary fan needs to be activated to meet the oil fume absorption effect. No additional operation is required on the air curtain inlet raft plate. At this time, the air curtain inlet raft plate intersects with the oil cup mounting plate on its upper side.

[0156] When the current oil fume concentration of the range hood is less than the oil fume concentration limit, the range hood does not need to provide smoke extraction and can be turned off. At this time, the control lifting mechanism will lower the air curtain baffle until it is fully retracted to protect the air curtain baffle and increase its service life. Simultaneously, the air curtain inlet raft plate should be adjusted as follows: Figure 2 and Figure 3 The system is in the off state as shown, and the auxiliary fan remains off.

[0157] S350: When the range hood receives a shutdown command, or when the current oil fume concentration of the range hood is less than the oil fume concentration limit, the range hood will be controlled to shut down after a set delay period.

[0158] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0159] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A range hood, characterized in that, The range hood includes an internal circulation air inlet / outlet assembly connected to a fan. The internal circulation air inlet / outlet assembly includes an air curtain outlet channel. An air curtain inlet raft is provided at the smoke inlet of the air curtain outlet channel. An auxiliary fan is provided on the side wall of the air curtain outlet channel. Oily fumes flow into the internal circulation air inlet / outlet assembly under the action of the fan, and are then diverted by the air curtain inlet raft and the auxiliary fan, allowing some of the oily fumes to enter the air curtain outlet channel and be ejected from the air curtain outlet channel to form an air curtain. The range hood also includes an air curtain lifting assembly fixed to the internal circulation air inlet / outlet assembly. The air curtain lifting assembly includes an air curtain baffle and a lifting mechanism, which drives the air curtain baffle to move up and down. The method further includes, after obtaining the current oil fume concentration of the range hood, the following steps: if the current oil fume concentration is less than or equal to a first preset oil fume concentration, then control the air curtain baffle to remain at the current position; if the current oil fume concentration is greater than the first preset oil fume concentration and the current oil fume concentration is less than or equal to a second preset oil fume concentration, then control the lifting mechanism to lift the air curtain baffle from the current position to a first target position; if the current oil fume concentration is greater than the second preset oil fume concentration, then control the lifting mechanism to lift the air curtain baffle from the current position to a second target position, and simultaneously determine whether the current oil fume concentration is greater than a third preset oil fume concentration, so as to adjust the air curtain speed formed by the air curtain outlet channel in the internal circulation air intake and exhaust assembly; wherein, the upward extension height of the air curtain baffle corresponding to the first target position and the second target position is greater than the upward extension height of the air curtain baffle corresponding to the current position, the first preset oil fume concentration is less than the second preset oil fume concentration, and the second preset oil fume concentration is less than the third preset oil fume concentration.

2. The range hood according to claim 1, characterized in that, The internal circulation air intake and exhaust assembly also includes an oil fume inlet channel and an air duct dividing baffle. The air curtain outlet channel and the oil fume inlet channel are separated by the air duct dividing baffle. The range hood also includes a first oil fume monitoring sensor, which is disposed in the oil fume inlet channel.

3. The smoke hood according to claim 1, characterized in that, The range hood also includes a second oil fume monitoring sensor, a wind speed sensor, and an oil fume purification module; The second oil fume monitoring sensor and the wind speed sensor are installed in the air curtain outlet channel; The fume purification module is installed at the air outlet of the air curtain outlet channel and is used to purify a portion of the fume gas entering the air curtain outlet channel.

4. The range hood according to claim 1, characterized in that, The range hood also includes an oil cup, an oil cup mounting port, and an oil cup mounting plate. The oil cup is inserted into the internal circulation air inlet and outlet assembly by pulling it out. The oil cup mounting plate is located on the lower side of the oil cup. The air curtain inlet raft plate intersects with the oil cup mounting plate on its upper side, thus closing the air curtain outlet channel; After the oil fume gas flows into the internal circulation air inlet and outlet assembly under the action of the fan, the mixed gas is brought into the air curtain outlet channel by starting the auxiliary fan, so as to be sprayed out from the air curtain outlet channel to form an air curtain; The mixed gas includes a portion of the cooking fume gas and the gas in the kitchen space.

5. The range hood according to claim 4, characterized in that, The internal circulation air intake and exhaust assembly also includes an internal circulation air outlet channel. The oil fume gas flows into the internal circulation air intake and exhaust assembly under the action of the fan and then enters the internal circulation air outlet channel. By starting the auxiliary fan, the mixed gas enters the air curtain air outlet channel, and another part of the oil fume gas is discharged outward from the internal circulation air outlet channel.

6. The range hood according to claim 1, characterized in that, After the oily fumes flow into the internal circulation air inlet and outlet assembly under the action of the fan, the inlet area of ​​the air curtain outlet channel is adjusted by rotating the air curtain inlet raft plate. At the same time, the auxiliary fan is started to divert the flow, so that some of the oily fumes enter the air curtain outlet channel and are ejected from the air curtain outlet channel to form an air curtain.

7. A range hood and cooktop combo unit, characterized in that, The integrated range hood and cooktop unit includes a cooktop and a range hood as described in any one of claims 1-6.

8. A method for controlling a range hood, characterized in that, Applied to any one of the following smoke hoods, the smoke hood control method comprises: Obtain the current oil fume concentration in the oil fume inlet channel of the range hood; Based on the current oil fume concentration, the auxiliary fan installed on the side wall of the air curtain outlet channel and / or the air curtain inlet raft plate installed at the smoke inlet of the air curtain outlet channel are activated to adjust the air curtain speed formed by the air curtain sprayed from the air curtain outlet channel in the internal circulation air intake and exhaust assembly.

9. The smoke hood control method according to claim 8, characterized in that, Before obtaining the current oil fume concentration of the range hood, the following steps are also included: After the range hood is started, the current speed setting of the range hood is obtained; The current position of the air curtain baffle is determined based on the current gear position, and the lifting mechanism is controlled to adjust the air curtain baffle to the current position.

10. The smoke machine control method according to claim 8, characterized in that, Based on the current oil fume concentration, the auxiliary fan installed on the side wall of the air curtain outlet channel and / or the air curtain inlet raft plate installed at the smoke inlet of the air curtain outlet channel are activated, including: If the current oil fume concentration is greater than the third preset oil fume concentration, the air curtain inlet raft plate set at the smoke inlet of the air curtain outlet channel is rotated, and the auxiliary fan set on the side wall of the air curtain outlet channel is started at the same time. If the current oil fume concentration is less than or equal to the third preset oil fume concentration, then the auxiliary fan installed on the side wall of the air curtain outlet channel will be activated.

11. The smoke hood control method according to claim 10, characterized in that, The smoke hood control method also includes: The concentration of oil fumes at the air curtain outlet and the wind speed at the air curtain outlet of the range hood are obtained. If the wind speed at the air curtain outlet reaches a preset wind speed threshold, the fume purification module is activated, and the power of the fume purification module is adjusted based on the fume concentration at the air curtain outlet. If the wind speed at the air curtain outlet does not reach the preset wind speed threshold, the power of the auxiliary fan is increased to enhance the wind speed of the air curtain formed by the air curtain ejected from the air curtain outlet channel.

12. The smoke machine control method according to claim 11, characterized in that, Determining whether to adjust the power of the fume purification module based on the fume concentration at the air curtain outlet includes: If the oil fume concentration at the air curtain outlet is greater than the fourth preset oil fume concentration, then the power of the oil fume purification module is increased. If the oil fume concentration at the air curtain outlet is less than or equal to the fourth preset oil fume concentration, the oil fume concentration of the range hood will continue to be detected.

13. The smoke machine control method according to claim 10, characterized in that, The smoke hood control method also includes: After the air curtain baffle is raised to the first target position, or after the air curtain baffle is kept in the current position, the oil fume concentration of the range hood continues to be detected.

14. The smoke machine control method according to claim 8, characterized in that, The smoke hood control method also includes: When the range hood receives a shutdown command, or when the current oil fume concentration of the range hood is less than the oil fume concentration limit, the range hood is controlled to shut down after a set delay.

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