Downdraft smoke and stove integrated machine

Abstract

The present invention belongs to the technical field of kitchen appliances, and specifically refers to a downdraft stove and range hood, which includes a cabinet; a stove and a range hood are mounted on the cabinet, and the range hood includes a filter cover, a smoke box, a fan, and an exhaust duct; the filter cover is disposed in the middle of the stove and includes a hollow smoke box, the top of the smoke box is provided with an air intake near the stove, and the bottom is provided with a first columnar filter, the interior of the smoke box and the first filter form a smoke duct, the first filter is disposed in the smoke box, and an oil collection box is disposed at the bottom; the smoke box is provided with a fan, the air inlet of the fan is connected to the inner cavity of the smoke box, and the air outlet of the fan is connected to the exhaust duct. The filter cover of the present invention is columnar and disposed in the middle of the stove, and has the characteristics of being compact, easy to install, and having good oil fume extraction effect; the air intake is disposed on the side wall and the top surface, which is conducive to smoking. In addition, the first columnar filter can increase the filtering area by changing the height, thereby improving the filtering effect.

Description

Technical Field

[0001] The invention belongs to the technical field of kitchen appliances, and in particular relates to a downdraft smoke and stove integrated machine. Background Art

[0002] A range hood, also known as a cooker hood, is a kitchen appliance that purifies the kitchen environment. Installed above the kitchen stove, it quickly extracts waste from combustion and harmful cooking fumes, exhausting them outdoors. It also condenses and collects the fumes, reducing pollution, purifying the air, and providing safety features like anti-toxic and explosion protection.

[0003] Traditional range hoods and stoves are two separate appliances, which take up a lot of space and greatly affect the usable space of small kitchens. Therefore, a range hood and stove all-in-one appliance has appeared on the market. At the same time, it is also cheaper than purchasing two products.

[0004] The utility model with Chinese patent number CN201921032597.2 discloses "A smoke and stove integrated machine", which includes: a cabinet body; a stove body, which is installed on the cabinet body; a smoke hood, which is installed on the cabinet body; and an insulation panel, which is fixed to the top of the smoke hood and can be raised and lowered with the raising and lowering of the smoke hood, wherein the top of the insulation panel is provided with a heating part that can be used to heat food, and the bottom of the insulation panel is provided with a smoke guide part that can guide oil smoke, so that the smoke hood can achieve the smoking effect. By arranging the insulation panel on the top of the smoke hood, the insulation panel can realize the food heating function, thereby enriching the function of the smoke and stove integrated machine, and the smoke guide part at the bottom of the insulation panel can play a role in guiding oil smoke. Compared with the solution of adding a movable smoke guide plate in the prior art, while meeting the smoke guiding function, the structure of the entire smoke and stove integrated machine is simplified, the failure rate during the operation of the smoke and stove integrated machine is reduced, and the user experience is improved.

[0005] But there are the following problems:

[0006] 1. Since the position of the smoke hood and the stove will affect the smoke extraction effect, the above-mentioned smoke hood is set on the back of the stove and is long and narrow. However, it is relatively large and can only be used for two-burner stoves, but is not suitable for four-burner stoves.

[0007] 2. The smoke hood has only two positions through the lifting structure: the working position extended from the cabinet and the storage position retracted into the cabinet. When the height of the cooker is too high or too low, the smoke extraction effect is not ideal.

[0008] 3. The filter inside the smoke hood is a flat design, which is consistent with the cross-sectional size of the smoke hood. Due to the limited area of ​​the filter, the filter cannot conduct oil smoothly, and is blocked by oil, affecting the suction force and making the oil fume filtration effect poor.

[0009] 4. The interior of the cabinet is filled with range hood parts, the space utilization rate is relatively low, and the exhaust duct is inconvenient to install. Summary of the Invention

[0010] The purpose of the present invention is to provide a downdraft smoke and stove integrated machine with a simple structure, a reasonable layout, a good smoking effect and convenient operation.

[0011] The object of the present invention is achieved like this:

[0012] A downdraft smoke and stove integrated machine, comprising a cabinet body;

[0013] The stove is installed above the cabinet and is used for cooking food;

[0014] The range hood is installed on the cabinet to absorb and filter the fumes produced by cooking.

[0015] The range hood comprises a columnar filter screen arranged above the cabinet, a smoking box arranged in the cabinet, a fan and an exhaust passage;

[0016] The filter cover is arranged in the middle of the stove and includes a hollow smoke hood, a top of the smoke hood is provided with an air inlet close to the stove, and a bottom of the smoke hood is provided with a columnar first filter. The interior of the smoke hood and the first filter form a smoking channel. The first filter is arranged in the smoking box and an oil collection box is provided at the bottom of the smoke hood.

[0017] The smoking box is provided with a fan, an air inlet of the fan is connected to the inner cavity of the smoking box, and an air outlet of the fan is connected to an exhaust channel.

[0018] Preferably, the air suction port includes a plurality of side air suction holes opened above the side wall of the smoking hood and a plurality of upper air suction holes arranged on the top surface of the smoking hood.

[0019] Preferably, the first filter screen and the smoke hood are both cylindrical; the upper end of the first filter screen is connected to the smoke hood through a filter screen fixing ring, a filter hole is opened in the middle thereof, and an oil collecting box is fixed to the lower end thereof.

[0020] Preferably, an activated carbon filter is detachably provided on the passage between the first filter and the smoking hood.

[0021] Preferably, the activated carbon filter includes an upper mesh cover, a lower mesh cover and an activated carbon sponge arranged therebetween, and the upper mesh cover and the lower mesh cover are fixed by a second snap-fit ​​structure.

[0022] Preferably, the second clip structure includes a second limiting protrusion ring arranged on the upper mesh cover, a second clip arranged below the second limiting protrusion ring, and a second clip groove arranged on the side wall of the lower mesh cover, the second clip is clipped into the second clip groove and makes the second limiting protrusion ring abut against the end of the lower mesh cover; the second limiting protrusion ring is provided with a third clip groove, the upper end of the lower mesh cover is provided with a third protrusion, and the third protrusion is clipped into the third clip groove.

[0023] Preferably, a top cover is detachably provided at the upper end of the smoking hood, an upper air suction hole is provided on the top cover, and a hand-held portion is also provided in the middle thereof.

[0024] Preferably, the top cover and the smoking hood / the smoking hood and the filter fixing ring / the filter fixing ring and the activated carbon filter are detachably connected by a first buckle structure;

[0025] The first snap-fit ​​structure includes an L-shaped snap-fit ​​groove arranged around one component and a first snap-fit ​​protrusion arranged on another component. A first limiting groove is provided at the bottom of the L-shaped snap-fit ​​groove, and a first limiting protrusion is provided at the bottom of the first snap-fit ​​protrusion. The first snap-fit ​​structure can be detachably connected by rotation.

[0026] Preferably, a lifting drive device is provided between the smoking box and the filter cover via a sliding frame, and the lifting drive device includes lifting push rods respectively provided on both sides of the smoking box and lifting sliders movably provided in the lifting push rods, and the two lifting sliders are respectively connected to the two ends of the sliding frame; a lifting drive assembly for driving the lifting slider to move is provided in one or two of the lifting push rods, and the lifting drive assembly includes a driving motor provided on one side of the lifting push rod and a screw rod provided inside the lifting push rod, the lifting slider is mounted on the screw rod, and the lifting drive assembly is controlled by a circuit board.

[0027] Preferably, the two lifting push rods are driven by drive motors respectively, and a Hall element is provided at the tail of the drive motor, and the synchronous rotation of the two drive motors is achieved through the Hall element and a synchronous control system.

[0028] Preferably, the lifting push rod is a hollow rod, and a sliding groove for the lifting slider to pass through is opened on one side of the rod, and guide grooves are symmetrically provided on both sides of the inner cavity of the rod; the lifting slider includes a slider body arranged in the inner cavity of the rod and sleeved on the screw rod, and guide parts adapted to the shape of the guide groove are provided on both sides of the slider body. A connecting part is also provided on the slider body, and the connecting part passes through the sliding groove and is connected to one side of the sliding frame.

[0029] Preferably, the guide groove is surrounded by two groove bars and has a cross-section with a small opening and a large interior. The cross-section of the guide portion is fan-shaped to match it and abutting portions are provided at the bottom to abut the groove bars. The abutting portions are perpendicular to the side faces of the guide portion and a stress groove is provided at the intersection.

[0030] Preferably, the sliding frame is a support plate, the two sides of the support plate are bent and connected to the lifting slider, a mesh cover mounting hole A is opened in the middle of the support plate, the side wall of the mesh cover mounting hole A is provided with a mounting protrusion, and the filter mesh cover is provided with a mounting slot of corresponding shape, and both can be detachably installed.

[0031] Preferably, the fan is arranged on one side of the smoking box, and the fan installation surface is higher than the bottom surface of the smoking box where the filter cover is located, and a fan installation hole for installing the fan is opened on the fan installation surface, and the fan installation hole is connected to the exhaust channel.

[0032] Preferably, a liquid collecting hole is provided on the bottom surface of the smoking box where the filter screen is located, and a liquid collecting box is detachably provided at the bottom of the liquid collecting hole.

[0033] Preferably, a storage cabinet is provided at the cabinet body below the range hood, and the exhaust duct is composed of a circular-to-square joint, a plurality of square tubes and a square right-angle joint, the circular-to-square joint is connected to the circular air outlet of the fan, and the exhaust duct (4) is fixed in the cabinet body and arranged around the top, back and bottom of the storage cabinet.

[0034] Preferably, the exhaust passage is also provided at the bottom of the storage cabinet, and the air outlet is provided on one side of the bottom of the cabinet body through a flat elbow joint.

[0035] Preferably, the cooker includes a chassis arranged above the cabinet, a plurality of induction cooker modules are arranged on the chassis, and a glass panel is arranged above the induction cooker module; a mesh cover mounting hole B for installing a filter mesh cover is also provided on the chassis in the center of the induction cooker module.

[0036] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0037] The filter cover of the present invention is cylindrical and located in the center of the cooker. It is compact, easy to install, and has excellent smoke extraction. Its air intakes are located on the side walls and top surface, facilitating smoke extraction. Furthermore, the height of the cylindrical first filter can be adjusted to increase the filtration area, thereby improving the filtration effect.

[0038] 2. The passage between the first filter screen and the smoking hood of the present invention is detachably provided with an activated carbon filter screen, which is beneficial to improving the filtering effect.

[0039] 3. The filter screen cover of the present invention can be detachably installed by means of a snap-fit ​​structure, which is simple and convenient, and easy to clean and replace parts.

[0040] 4. The height of the filter cover can be manually adjusted through the circuit board according to the height of the cooker to achieve a better smoking effect. At the same time, when not in use, it can be lowered into the smoking box, which is beautiful and neat.

[0041] 5. The present invention uses a drive motor, and through the Hall element and synchronous control system, the two drive motors are synchronized to ensure the position of the filter cover and facilitate lifting. At the same time, the stable synchronous lifting structure can prevent the oil in the oil collection box from splashing out.

[0042] 6. The connection structure of the lifting push rod and the lifting slider of the present invention can ensure the stability and accuracy of the two during lifting.

[0043] 7. The exhaust duct designed by the present invention uses square tubes instead of round tubes and is arranged around the storage cabinet, which reduces the installation gap between the storage cabinet and the cabinet body, frees up more storage space for the storage cabinet, and greatly improves the space utilization rate of the cabinet body.

[0044] 8. The present invention can set the air outlet on any side of the bottom of the cabinet through a flat elbow joint at the bottom of the storage cabinet, which is convenient for the layout of the external exhaust channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is one of the structural diagrams of the smoke and stove integrated machine of the present invention.

[0046] Figure 2 This is the second structural diagram of the smoke and stove integrated machine of the present invention.

[0047] Figure 3 It is a structural diagram of the present invention after the cabinet is hidden.

[0048] Figure 4 It is a schematic diagram of the internal structure of the cooker of the present invention.

[0049] Figure 5 It is a structural schematic diagram of the bottom surface of the stove of the present invention.

[0050] Figure 6 It is a structural schematic diagram of the filter screen cover of the present invention.

[0051] Figure 7 It is an exploded view of the filter screen cover of the present invention.

[0052] Figure 8 It is a cross-sectional view of the filter screen cover of the present invention.

[0053] Figure 9 yes Figure 8 A partial enlarged view of the top cover connection structure at point A in the middle.

[0054] Figure 10 yes Figure 8 A partial enlarged view of the oil collecting box connection structure at point B in the middle.

[0055] Figure 11 yes Figure 8A partial enlarged view of the filter screen fixing ring connection structure at point C in the middle.

[0056] Figure 12 It is a structural diagram of the smoking box, the filter screen cover and the lifting drive device of the present invention.

[0057] Figure 13 It is a structural schematic diagram of the lifting drive device of the present invention.

[0058] Figure 14 It is a cross-sectional view of the lifting push rod and the lifting slider of the present invention.

[0059] Figure 15 It is an exploded view of the lifting push rod and the lifting slide block of the present invention.

[0060] Figure 16 This is a reference diagram of the use state of the filter screen cover of the present invention after it is lowered.

[0061] Figure 17 It is a structural diagram of the smoking box, the fan and the exhaust duct of the present invention.

[0062] Figure 18 It is a structural schematic diagram of the exhaust passage hidden behind the left side panel of the cabinet according to the present invention.

[0063] Figure 19 It is a structural schematic diagram of the second exhaust channel of the present invention.

[0064] Figure 20 It is a schematic structural diagram of the third exhaust channel of the present invention.

[0065] The meaning of the numbers in the figure:

[0066] 1- filter cover; 2- smoking box; 3- fan; 4- exhaust duct;

[0067] 11 - exhaust hood; 12 - air inlet; 12a - side air inlet; 12b - upper air inlet; 13 - first filter; 14 - oil collection box; 141 - fixing slot; 142 - oil collection gap; 15 - filter fixing ring; 16 - activated carbon filter; 161 - upper mesh cover; 162 - lower mesh cover; 163 - activated carbon sponge; 164 - second limiting protrusion; 165 - second buckle; 166 - second slot; 167 - third slot; 168 - third protrusion; 17 - top cover; 171 - handle; 172 - L-shaped slot; 173 - first buckle protrusion; 174 - first limiting slot; 175 - first limiting protrusion; 18 - mounting slot;

[0068] 20-sliding frame; 21-lifting drive device; 211-net cover mounting hole A; 212-mounting protrusion;

[0069] 22 - lift push rod; 221 - rod; 222 - slide; 223 - guide groove; 224 - slot; 225 - guide rail; 226 - mounting portion; 227 - screw rod mounting bracket; 23 - lift slider; 231 - slider body; 232 - guide portion; 233 - connecting portion; 234 - abutment portion; 235 - stress groove; 236 - guide bar; 24 - circuit board; 25 - drive motor; 26 - screw rod; 27 - Hall element; 28 - rubber ring; 29 - lift cover;

[0070] 31-semicircular fan blade; 32-fan mounting hole; 33-liquid collecting hole; 34-liquid collecting box;

[0071] 41-round to square joint; 42-square tube; 43-square right-angle joint; 44-flat elbow joint; 45-square to round joint;

[0072] 100-range hood;

[0073] 200 - Cooker; 201 - Chassis; 202 - Induction Cooker Module; 203 - Glass Panel; 204 - Grille Mounting Hole B; 205 - Heat Dissipation Vent; 206 - Control Panel; 207 - Power Supply Box;

[0074] 300-cabinet body; 301-storage cabinet. DETAILED DESCRIPTION

[0075] The present invention will be further described below in conjunction with specific embodiments:

[0076] like Figure 1 As shown, a downdraft range hood and stove integrated machine includes a cabinet 300, above which are arranged a stove 200 for cooking food and a range hood 100, which is used to absorb and filter the fumes generated by cooking food.

[0077] like Figure 2-4 As shown, the cooker 200 includes a chassis 201 mounted above a cabinet 300. Multiple induction cooker modules 202, preferably two or four, are mounted on the chassis 201. A glass panel 20 is positioned above the induction cooker modules 202. To dissipate heat, the sidewalls and bottom of the chassis 201 are provided with several heat dissipation vents 205 for dissipating heat from the induction cooker modules 202. A control panel 206 for controlling the cooker 200 and range hood 100, as well as a power supply box 207, are located in the center of the chassis 201. Alternatively, the cooker 200 of this embodiment may be a gas stove module.

[0078] The range hood 100 includes a columnar filter cover 1 disposed above a cabinet 300 , a smoking box 2 disposed within the cabinet 300 , a fan 3 , and an exhaust duct 4 .

[0079] The filter screen cover 1 is installed in the middle of the cooker 200, that is, a screen cover installation hole B204 for installing the filter screen cover 1 is opened on the chassis 201 at the center of the induction cooker module 202. The screen cover installation hole B204 is provided with the filter screen cover 1 to achieve all-round smoking on the left and right sides.

[0080] like Figure 6-8 As shown, the filter cover 1 includes a hollow smoke hood 11. The top of the smoke hood 11 is provided with an air intake 12 near the cooker 200. The air intake 12 includes a plurality of side air intake holes 12a provided above the side walls of the smoke hood 11 and a plurality of upper air intake holes 12b provided on the top surface of the smoke hood 11. The side air intake holes 12a and the upper air intake holes 12b are arranged in strips around the circumference to facilitate the absorption of surrounding oil smoke. To increase strength, the middle portion of the side air intake holes 12a is provided with reinforcing ribs.

[0081] A first columnar filter 13 is provided at the bottom of the smoking hood 11. The interior of the smoking hood 11 and the first filter 13 form a smoking passage. The first filter 13 is provided in the smoking box 2 and an oil collecting box 14 is provided at the bottom thereof. Specifically, the upper end of the first filter 13 is detachably connected to the smoking hood 11 via a filter fixing ring 15, a filter hole is provided in the middle thereof, and the oil collecting box 14 is fixed at the lower end thereof. Figure 10 As shown, a fixing groove 141 is provided at the bottom of the oil collecting box 14, and multiple layers of first filter screens 13 are fixed and fitted together in the fixing groove 141. The filter holes of different first filter screens 13 are staggered, and an oil collecting gap 142 is provided between the oil collecting wall of the oil collecting box 14 and the outermost first filter screen 13 to facilitate the collection of oil.

[0082] In this embodiment, for easy installation, the filter fixing ring 15, the first filter 13 and the oil collecting box 14 are an integral unit, and the integral unit is arranged in the smoking box 2 to retain the oil in the box to prevent contamination of other parts.

[0083] Preferably, both the first filter 13 and the smoke hood 11 are cylindrical. The cylindrical filter hood 1 occupies a relatively small footprint. Furthermore, compared to a cross-sectional filter arrangement, this structure significantly increases the filtration area of ​​the first filter 13 and facilitates vertical oil collection in the oil collection box 14. Of course, either the first filter 13 or the smoke hood 11 can also be designed in a square shape. In another embodiment, the smoke hood 11 is square and the first filter 13 is circular, and they are connected to each other via a filter retaining ring 15.

[0084] To better filter oil smoke, a removable activated carbon filter 16 is installed in the passage between the first filter 13 and the smoke hood 11. The activated carbon filter 16 comprises an upper mesh cover 161, a lower mesh cover 162, and an activated carbon sponge 163 disposed therebetween. The upper mesh cover 161 and the lower mesh cover 162 are secured together by a second snap-fit ​​structure 165, facilitating assembly and ensuring structural stability. The second snap-fit ​​structure 165 comprises a second retaining ring 164 disposed on the upper mesh cover 161, a second snap-fit ​​structure 165 disposed below the second retaining ring 164, and a second slot 166 disposed on the sidewall of the lower mesh cover 162. The second snap-fit ​​structure 165 engages within the second slot 166, causing the second retaining ring 164 to abut against the end of the lower mesh cover 162. Preferably, a third slot 167 is provided on the second retaining ring 164, and a third protrusion 168 is disposed on the upper end of the lower mesh cover 162, which engages within the third slot 167.

[0085] In order to facilitate the replacement of the activated carbon filter 16, a top cover 17 is detachably provided on the upper end of the smoking hood 11. The top cover 17 is provided with an upper air suction hole 12b and a handle 171 in the middle. At the same time, the top cover 17 can prevent food from falling into the smoking hood 11.

[0086] like Figure 7 、 9 As shown in Figures 11, in order to facilitate disassembly, the top cover 17 and the smoking hood 11 / the smoking hood 11 and the first filter 13 / the first filter 13 and the activated carbon filter 16 are detachably connected through a first snap-fit ​​structure.

[0087] The first snap-fit ​​structure includes an L-shaped slot 172 disposed around one component and a first snap-fit ​​protrusion 173 disposed on another component. A first retaining groove 174 is defined at the bottom of the L-shaped slot 172, and a first retaining protrusion 175 is defined at the bottom of the first snap-fit ​​protrusion 173. Rotation allows for detachable connection of the first snap-fit ​​structure. This structure facilitates disassembly and provides stable and reliable assembly.

[0088] In this embodiment, the top cover 17 is provided with an L-shaped slot 172, and the upper end of the smoke hood 11 is provided with a first latching protrusion 173 of a corresponding shape. The first filter 13 is connected to the other structures via the filter retaining ring 15. Specifically, the inner wall of the filter retaining ring 15 is provided with two rows of first latching protrusions 173, which respectively connect to the smoke hood 11 and the activated carbon filter 16. The bottom of the smoke hood 11 and the activated carbon filter 16 are provided with corresponding L-shaped slots 172.

[0089] In addition, a mounting slot 18 for mounting the filter screen cover 1 is provided on its outer side wall.

[0090] Since the height of the cooker is different, the height distance between the air inlet 12 and the cooker directly affects the smoking effect. Therefore, in this embodiment, the filter cover 1 is set to be liftable. The specific structure is as follows:

[0091] like Figure 12-13 As shown, a lifting drive device 21 is provided between the smoking box 2 and the filter screen 1 via a sliding frame 20. The sliding frame 20 is a support plate with two curved sides connected to the lifting slider 23. A screen mounting hole A211 is defined in the center of the support plate, and mounting protrusions 212 are provided on the sidewalls of the screen mounting hole A211. The filter screen 1 is provided with a correspondingly shaped mounting slot 18, allowing for removable mounting. Preferably, the mounting slot 18 is provided on the outer periphery of the filter screen retaining ring 15.

[0092] like Figure 16 As shown, the height of the smoking box 2 is greater than the height of the filter cover 1, that is, when the filter cover 1 is lowered, the filter cover 1 can be completely sunk into the smoking box 2, so that its upper surface is flush with the surface of the stove 200.

[0093] The lifting drive device 21 includes lifting push rods 22 respectively arranged on both sides of the smoking box 2 and lifting sliders 23 movably arranged in the lifting push rods 22. The two lifting sliders 23 are respectively connected to the two ends of the sliding frame 20.

[0094] One or both of the lift push rods 22 are equipped with a lift drive assembly that drives the lift slider 23. The lift drive assembly is controlled by a circuit board 24. The lift drive assembly includes a drive motor 25 located on one side of the lift push rod 22 and a screw 26 located within the lift push rod 22. Screw mounting brackets 227 are located at both ends of the rod 221. The screw 26 is rotatably mounted between the screw mounting brackets 227. The main shaft of the drive motor 25 is also located within one of the screw mounting brackets 227 and engages with the screw 26. The lift slider 23 is mounted on the screw 26 and moves through the rotation of the screw 26.

[0095] In this embodiment, the two lifting push rods 22 are driven by drive motors 25 respectively, and a Hall element 27 is provided at the tail of the drive motor 25. The Hall element 27 and the synchronous control system realize the synchronous rotation of the two drive motors 25.

[0096] In another embodiment, when the lifting push rods are both provided with screw rods and the lifting drive device has only one drive motor, the synchronization of the lifting sliders 23 on both sides can be ensured by a synchronous wheel, that is, the bottoms of the two screw rods 26 are respectively provided with synchronous wheels, and a synchronous belt is provided between the synchronous wheels, and the synchronous lifting of the lifting sliders 23 is achieved through the synchronous belt.

[0097] In order to utilize the height space of the bottom plate 201 , the top of the smoking box 2 is arranged inside the bottom plate 201 , so that the top surface is arranged inside the upper surface of the bottom plate 201 .

[0098] like Figure 14-15 As shown, the lifting push rod 22 is a hollow rod 221. A slot 222 is defined on one side of the rod 221, through which the lifting slider 23 passes. Corresponding notches are provided on either side of the smoking box 2. Mounting portions 226 extend from the rod 221 on either side of the slot 222. These mounting portions 226 are secured to the notches of the smoking box 2 via fasteners. Guide slots 223 are symmetrically defined on either side of the rod 221's interior. These guide slots 223 are formed by two grooves 224 and have a cross-section with a small opening and a large interior. The lifting slider 23 includes a slider body 231 disposed within the rod 221's interior. The slider body 231 has a threaded hole and is fitted over the screw rod 26. The slider body 231 is provided with guide portions 232 on both sides that match the shape of the guide groove 223. The guide portions 232 have a matching fan-shaped cross-section and are provided with abutment portions 234 at their bottoms that abut the groove 224. The abutment portions 234 and the side surfaces of the guide portions 232 are perpendicular to each other, and a stress groove 235 is provided at the intersection to prevent surface scratches. The slider body 231 is also provided with a connection portion 233, which passes through the slide groove 222 and connects to one side of the sliding frame 20.

[0099] Preferably, a guide bar 236 is provided on one side of the slider body 231 opposite to the connecting portion 233, and a corresponding guide rail 225 is provided in the inner cavity of the rod 221. The guide bar 236 and the guide rail 225 abut against each other to prevent the inner end from tilting and causing uneven sliding.

[0100] In order to protect the lifting drive device, a lifting cover 29 is installed on its outside; in order to facilitate the wiring of the lifting drive devices on both sides, a wiring hole for line installation is provided on the inner side of the smoking box 2 inside the lifting cover 29, and a rubber ring 28 is provided in the wiring hole. A grid piece is provided in the middle of the rubber ring 28 to prevent oil from splashing.

[0101] like Figure 17-18 As shown, in this embodiment, the fan 3 is an energy-efficient fan with front and rear double-sided air intake, and is arranged on one side of the smoking box 2. The first filter 13 is arranged side by side next to the fan 3, and the double-sided air intake realizes the rapid absorption, filtration and discharge of oil smoke. Figure 5 As shown, the fan mounting surface is provided with a fan mounting hole 32 for mounting the fan 3, and the fan mounting hole 32 is connected to the exhaust duct 4. The fan mounting surface should be higher than the bottom surface of the smoking box 2 where the filter cover 1 is located to prevent oil from escaping from the fan mounting hole 32.

[0102] In order to prevent water from entering the smoking box 2 through the smoking cover, a liquid collecting hole 33 is provided on the bottom surface of the smoking box 2 where the filter cover 1 is located. A liquid receiving box 34 is detachably provided at the bottom of the liquid collecting hole 33 .

[0103] Preferably, two semicircular fan blades 31 are rotatably provided at the fan mounting hole 32, and the fan blades seal the exhaust passage 4 through a reset member. When the fan 3 is working, the wind force will overcome the elastic force of the reset member to open the fan blades, thereby preventing small animals such as cockroaches and mice from crawling into the smoking box through the exhaust passage 4.

[0104] A storage cabinet 301 is located within the cabinet 300 below the range hood 100. The exhaust duct 4, comprised of a circular-to-square connector 41 connected to the fan mounting hole 32, several square tubes 42, and square right-angle connectors 43, is located above, behind, and below the storage cabinet 301. The exhaust duct design of the present invention utilizes square tubes instead of circular tubes and surrounds the storage cabinet, reducing the installation gap between the storage cabinet and the cabinet body. This frees up more storage space within the cabinet and significantly improves the cabinet's space utilization. Furthermore, the exhaust duct 4 of this embodiment can be a rigid metal or plastic tube, or a flexible tube.

[0105] Preferably, the exhaust duct 4 is also provided at the bottom of the storage cabinet 301, and the air outlet is provided at one side of the bottom of the cabinet body 300 through a flat elbow joint 44. Figure 4 As shown, in this embodiment, the air outlet of the exhaust duct 4 is arranged on the front side of the cabinet 300; Figure 19 As shown, the air outlet is arranged on the left side of the cabinet 300; Figure 20 As shown, this is an embodiment in which the air outlet is arranged on the right side of the cabinet 300.

[0106] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A downdraft smoke and stove integrated machine, comprising a cabinet (300); A stove (200) is installed above the cabinet (300) and is used for cooking food; The range hood (100) is mounted on the cabinet (300) and is used to absorb and filter the fumes generated by cooking food. The features include: The range hood (100) comprises a columnar filter screen (1) arranged above a cabinet (300), a smoking box (2) arranged in the cabinet (300), a fan (3) and an exhaust passage (4); The filter screen cover (1) is arranged in the middle of the stove (200) and includes a hollow smoking cover (11). The top of the smoking cover (11) is provided with an air inlet (12) close to the stove (200), and the bottom is provided with a columnar first filter screen (13). A filter hole is provided in the middle of the first filter screen (13). The interior of the smoking cover (11) and the first filter screen (13) forms a smoking passage. The first filter screen (13) is arranged in the smoking box (2) and an oil collecting box (14) is provided at the bottom. The smoking box (2) is provided with a fan (3), an air inlet of the fan (3) is connected to the inner cavity of the smoking box (2), and an air outlet of the fan (3) is connected to an exhaust passage (4); A lifting drive device (21) for adjusting the height of the filter screen (1) is provided between the smoking box (2) and the filter screen (1) via a sliding frame (20); the filter screen (1) and the sliding frame (20) are detachably mounted.

2. The downdraft smoke and stove integrated machine according to claim 1, characterized in that: The air suction port (12) comprises a plurality of side air suction holes (12a) provided above the side wall of the smoking hood (11) and a plurality of upper air suction holes (12b) provided on the top surface of the smoking hood (11).

3. The downdraft smoke and stove integrated machine according to claim 1, characterized in that: The first filter screen (13) and the smoking hood (11) are both cylindrical; the upper end of the first filter screen (13) is connected to the smoking hood (11) through a filter screen fixing ring (15), and the lower end thereof is fixed with an oil collecting box (14).

4. The downdraft smoke and stove integrated machine according to any one of claims 1 to 3, characterized in that: An activated carbon filter (16) is detachably provided on the passage between the first filter (13) and the smoking hood (11).

5. The downdraft smoke and stove integrated machine according to claim 4, characterized in that: The activated carbon filter (16) comprises an upper mesh cover (161), a lower mesh cover (162), and an activated carbon sponge (163) disposed therebetween. The upper mesh cover (161) and the lower mesh cover (162) are fixed via a second buckle (165) structure.

6. The downdraft smoke and stove integrated machine according to claim 5, characterized in that: The second snap-on (165) structure comprises a second limiting convex ring (164) provided on the upper mesh cover (161), a second snap-on (165) provided below the second limiting convex ring (164), and a second snap-on groove (166) provided on the side wall of the lower mesh cover (162); the second snap-on (165) is snap-fitted into the second snap-on groove (166) and causes the second limiting convex ring (164) to abut against the end of the lower mesh cover (162); a third snap-on groove (167) is provided on the second limiting convex ring (164); a third protrusion (168) is provided on the upper end of the lower mesh cover (162), and the third protrusion (168) is snap-fitted into the third snap-on groove (167).

7. The downdraft range hood and stove combination according to claim 6, characterized in that: The upper end of the smoking hood (11) is detachably provided with a top cover (17), an upper air suction hole (12b) is provided on the top cover (17), and a hand-held portion (171) is also provided in the middle thereof.

8. The downdraft smoke and stove integrated machine according to claim 7, characterized in that: The top cover (17) and the smoking hood (11) / the smoking hood (11) and the first filter (13) / the first filter (13) and the activated carbon filter (16) are detachably connected via a first buckle structure; The first snap-fit ​​structure comprises an L-shaped snap-fit ​​groove (172) arranged around one component and a first snap-fit ​​protrusion (173) arranged on another component. A first limiting groove (174) is provided at the bottom of the L-shaped snap-fit ​​groove (172), and a first limiting protrusion (175) is provided at the bottom of the first snap-fit ​​protrusion (173). The first snap-fit ​​structure is detachably connected by rotation.

9. The downdraft smoke and stove integrated machine according to claim 2 or 3, characterized in that: A lifting drive device (21) is provided between the smoking box (2) and the filter screen cover (1) via a sliding frame (20). The lifting drive device (21) comprises lifting push rods (22) respectively provided on both sides of the smoking box (2) and lifting sliders (23) movably provided in the lifting push rods (22). The two lifting sliders (23) are respectively connected to the two ends of the sliding frame (20). A lifting drive assembly for driving the lifting slider (23) to move is provided in one or two of the lifting push rods (22). The lifting drive assembly includes a drive motor (25) provided on one side of the lifting push rod (22) and a screw rod (26) provided inside the lifting push rod (22). The lifting slider (23) is sleeved on the screw rod (26). The lifting drive assembly is controlled by a circuit board (24).

10. The downdraft smoke and stove integrated machine according to claim 9, characterized in that: The two lifting push rods (22) are driven by driving motors (25) respectively, and the tail of the driving motor (25) is provided with a Hall element (27). The Hall element (27) and the synchronous control system realize the synchronous rotation of the two driving motors (25).

11. The downdraft range hood and stove combination according to claim 9, characterized in that: The lifting push rod (22) is a hollow rod (221), and a sliding groove (222) for the lifting slider (23) to pass through is opened on one side of the rod (221), and guide grooves (223) are symmetrically arranged on both sides of the inner cavity of the rod (221); the lifting slider (23) includes a slider body (231) arranged in the inner cavity of the rod (221) and sleeved on the screw rod (26), and guide parts (232) adapted to the shape of the guide groove (223) are arranged on both sides of the slider body (231), and a connecting part (233) is also arranged on the slider body (231), and the connecting part (233) passes through the sliding groove (222) and is connected to one side of the sliding frame (20).

12. The downdraft range hood and stove combination according to claim 11, characterized in that: The guide groove (223) is surrounded by two groove bars (224) and has a cross-section with a small opening and a large interior. The guide portion (232) has a cross-section that is adapted to the fan shape and has an abutting portion (234) at the bottom that abuts against the groove bar (224). The abutting portion (234) and the side surface of the guide portion (232) are perpendicular to each other, and a stress groove (235) is provided at the intersection.

13. The downdraft range hood and stove combination according to claim 9, characterized in that: The sliding frame (20) is a support plate, and the two sides of the support plate are bent and connected to the lifting slider (23). A mesh cover mounting hole A (211) is opened in the middle of the support plate, and a mounting protrusion (212) is provided on the side wall of the mesh cover mounting hole A (211). The filter mesh cover (1) is provided with a mounting slot (18) of a corresponding shape, and the two can be detachably installed.

14. The downdraft range hood and stove combination according to claim 1, characterized in that: The fan (3) is arranged on one side of the smoking box (2), and the fan installation surface is higher than the bottom surface of the smoking box (2) where the filter screen (1) is located. A fan installation hole (32) for installing the fan (3) is opened on the fan installation surface, and the fan installation hole (32) is connected to the exhaust channel (4).

15. The downdraft smoke and stove integrated machine according to claim 14, characterized in that: A liquid collecting hole (33) is provided on the bottom surface of the smoking box (2) where the filter screen cover (1) is located, and a liquid receiving box (34) is detachably provided at the bottom of the liquid collecting hole (33).

16. The downdraft range hood and stove combination according to claim 1, characterized in that: A storage cabinet (301) is provided on the cabinet body (300) below the range hood (100). The exhaust passage (4) is composed of a circular-to-square joint (41), a plurality of square tubes (42), and a square right-angle joint (43). The circular-to-square joint (41) is connected to the circular air outlet of the fan (3). The exhaust passage (4) is fixed in the cabinet body (300) and arranged around the top, back, and bottom of the storage cabinet (301).

17. The downdraft range hood and stove combination according to claim 16, characterized in that: The exhaust passage (4) is also provided at the bottom of the storage cabinet (301), and the air outlet is provided at one side of the bottom of the cabinet body (300) via a flat elbow joint (44).

18. The downdraft range hood and stove combination according to claim 1, characterized in that: The cooker (200) comprises a chassis (201) arranged above a cabinet (300); a plurality of induction cooker modules (202) are arranged on the chassis (201); a glass panel (203) is arranged above the induction cooker modules (202); and a filter screen mounting hole B (204) for mounting a filter screen (1) is also provided on the chassis (201) at the center of the induction cooker module (202).

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