Efficient desktop range hood

Abstract

The efficient table top range hood comprises a machine shell and a filtering device used for filtering oil smoke, a smoke suction channel is formed in the machine shell, a suction port and an exhaust port which are communicated with the smoke suction channel are formed in the front end and the rear end of the machine shell respectively, and a side air outlet channel is formed in the position, corresponding to the rear portion of the suction port, of the periphery of the machine shell. The side air outlet channel and the smoke suction channel are mutually independent, a side air outlet is formed in the side air outlet channel, airflow blown out by the side air outlet forms an air wall, the side air outlet channel is further provided with an air inlet, and the air inlet is used for being connected with a positive pressure air source. According to the ventilation wall formed by the ventilation wall forming device, airflow power is independently provided by the air supply fan, the coverage range and the air pressure effect of the ventilation wall are ensured, and therefore escape of oil smoke in the distance is reduced, and more oil smoke is further treated after entering the air suction channel.

Description

Technical Field

[0001] This invention relates to a desktop range hood, and more particularly to a desktop range hood with a wind wall. Background Technology

[0002] Chinese Patent Publication No. CN117366639A, published on January 9, 2024, discloses an air outlet structure, a fume extraction device, and a desktop range hood. The air outlet structure includes a guide member disposed near the air outlet, directly facing the air outlet, with a gap between the guide member and the air outlet. The guide member is adapted to block airflow from the front of the air outlet, and the airflow from the air outlet is guided out through the gap between the guide member and the air outlet, forming a side air outlet. This structure allows the range hood to emit side airflow, forming a wind wall to prevent fumes in front of the range hood from escaping behind the wind wall, thereby improving the fume extraction effect. However, because the range hood intake also has a filter, the air pressure and velocity at the exhaust outlet are significantly reduced, resulting in a smaller coverage area of ​​the wind wall, making it easier for fumes to escape.

[0003] In addition, the above-mentioned range hood has a filter screen at the inlet. The filtration area depends on the radial cross-sectional area of ​​the inlet. If the filtration area is small, the filtration effect will be affected. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency desktop range hood with a simple and reasonable structure, side air outlet generated by an independent fan, which can ensure the effective formation of the air wall, prevent the escape of oil fumes, and has a high oil fume inhalation rate.

[0005] The objective of this invention is achieved as follows: A high-efficiency desktop range hood includes a housing and a filter device for filtering oil fumes. The housing has a smoke extraction channel, and the front and rear ends of the housing are respectively provided with a suction port and an exhaust port communicating with the smoke extraction channel. A side air outlet channel is provided on the outer periphery of the housing corresponding to the rear of the suction port. The side air outlet channel is independent of the smoke extraction channel. The side air outlet channel is provided with a side air vent, and the air vent blows out air to form a wind wall. The side air outlet channel is also provided with an air inlet for connecting to a positive pressure air source.

[0006] The objective of this invention can also be achieved by the following technical measures: As a more specific embodiment, the housing is cylindrical, the smoke extraction channel includes an air duct and a smoke extraction fan, the air duct is formed inside the housing in a front-to-back direction, the smoke extraction fan is installed inside the air duct, the front and rear ends of the air duct are the suction port and the exhaust port respectively, and the side air outlet is located in front of the exhaust port.

[0007] As a further embodiment, the rear end of the housing is provided with a collar, which together with the housing forms the side air outlet channel. The upper and lower sides of the collar are respectively provided with the side air outlet and the air inlet. The side air outlet is slit-shaped, and the included angle α between the two ends of the side air outlet and the central axis of the housing is 90 degrees to 180 degrees.

[0008] As a further embodiment, the inner wall of the exhaust port is tapered, wider at the front end and narrower at the rear end.

[0009] As a further embodiment, the positive pressure air source includes an air supply duct and an air supply fan. The air supply fan is installed in the air supply duct, which has an air outlet and an air inlet connected to it. The air outlet is connected to the air inlet of the side air outlet duct, and the air inlet is connected to the outside. The air supply fan is connected in parallel with the smoke extraction fan; or, the air supply fan and the smoke extraction fan are controlled independently.

[0010] As a further embodiment, the front end of the housing corresponding to the suction port is provided with a smoke hood; or, the front end of the housing corresponding to the suction port is directly or through the smoke hood in telescopic cooperation with the sleeve, and the sleeve is directly or through the smoke hood in communication with the suction port.

[0011] As a further embodiment, the filtration device includes a primary filter screen disposed at the fixed suction port.

[0012] As a further embodiment, the filtration device includes a high-efficiency filter element, which includes a cylindrical filter layer and a flow guide cone. One end of the cylindrical filter layer faces the exhaust port, and the flow guide cone is disposed inside the cylindrical filter layer. The tip of the flow guide cone points to the exhaust port and extends to one end of the cylindrical filter layer, while the wide end of the flow guide cone blocks the other end of the cylindrical filter layer.

[0013] As a further embodiment, the air supply channel is oriented front to back; the bottom of the housing is also provided with a bracket connecting seat; or, the housing is mounted on a support base, and the air supply channel is oriented vertically and located inside the support base.

[0014] The beneficial effects of this invention are as follows: (1) The wind wall generated by the wind wall forming device of the present invention is powered by the air supply fan, which ensures the coverage and wind pressure effect of the wind wall, thereby reducing the escape of oil fumes from a distance and allowing more oil fumes to be further processed after entering the suction channel.

[0015] (2) In this invention, the blower that generates wind force for the wind wall can be set inside the support base, making the head part smaller and improving the design space of the product.

[0016] (3) The filter device of the present invention has a cylindrical filter layer, which can form a large filter area. At the same time, a guide cone is set inside the cylinder to guide the oil fumes discharged axially from the exhaust port to flow radially, so that they pass through the wall of the cylindrical filter layer, making the entire wall of the cylindrical filter layer an effective filter area, which greatly improves the filtration effect.

[0017] (4) Because the present invention has a larger filtration area and a larger flow rate, it reduces the pressure difference between the suction port and the exhaust port, thus reducing noise. It also helps to increase the speed of the smoke extraction fan during the design process, thereby increasing the suction strength.

[0018] (5) The front end of the range hood body of the present invention is provided with a sleeve, and the front end of the sleeve forms a movable suction port. The relative distance between the movable suction port and the range hood body can be adjusted, so as to move closer to the source of oil fumes, or to facilitate the user to adjust the movable suction port to the desired position. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the angle structure of the first embodiment of the smoke hood of the present invention.

[0020] Figure 2 for Figure 1 Another structural diagram from a different angle.

[0021] Figure 3 This is an exploded structural diagram of the present invention.

[0022] Figure 4 for Figure 3 Another structural diagram from a different angle.

[0023] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0024] Figure 6 for Figure 5 Schematic diagram of the AA section structure.

[0025] Figure 7 This is an exploded structural diagram of the first embodiment of the filtration device in this invention.

[0026] Figure 8 This is a schematic diagram of the assembled structure of the first embodiment of the filtration device in this invention.

[0027] Figure 9 This is a partial cross-sectional view of the magnetic connection between the filter device and the range hood body in this invention.

[0028] Figure 10 This is a schematic diagram of another embodiment of the collar in this invention.

[0029] Figure 11This is a schematic diagram of the structure of the first embodiment of the filter device in this invention after the snap-fit ​​is installed.

[0030] Figure 12 This is a three-dimensional structural diagram of the second embodiment of the filtration device in this invention.

[0031] Figure 13 This is a cross-sectional view of the second embodiment of the filtering device in this invention.

[0032] Figure 14 This is an exploded structural diagram of the second embodiment of the filtration device in this invention.

[0033] Figure 15 This is an exploded structural diagram of the third embodiment of the filtration device in this invention.

[0034] Figure 16 This is an exploded structural diagram of the fourth embodiment of the filtration device in this invention.

[0035] Figure 17 This is an exploded structural diagram of the second embodiment of the present invention.

[0036] Figure 18 This is a three-dimensional structural diagram of the second embodiment of the present invention.

[0037] Figure 19 This is a cross-sectional view of the second embodiment of the present invention.

[0038] Figure 20 This is a schematic diagram of the angle adjustment state structure according to the second embodiment of the present invention.

[0039] Figure 21 This is a schematic diagram of another embodiment of the second embodiment of the present invention.

[0040] Figure 22 This is a schematic diagram of the adjustment state structure in another embodiment of the second embodiment of the present invention.

[0041] Figure 23 This is a schematic diagram of the structure of the third embodiment of the present invention.

[0042] Figure 24 This is a schematic diagram of the second embodiment of the sleeve in the third embodiment of the present invention.

[0043] Figure 25 This is a schematic diagram of the third embodiment of the sleeve in this invention.

[0044] Figure 26 This is a cross-sectional structural diagram of another embodiment of the third embodiment of the present invention.

[0045] Figure 27 This is a schematic diagram of the connection structure between the desktop range hood and the electric heating cooker in this invention.

[0046] Figure 28 This is a cross-sectional view of the desktop range hood after the oil cup, mesh cover, and decorative sleeve are added. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1, see Figures 1 to 6 As shown, a desktop range hood with a wind wall function includes a housing 1, with a smoke-smoking channel inside the housing 1. The front and rear ends of the housing 1 are respectively provided with a suction port 11 and an exhaust port 15 communicating with the smoke-smoking channel. Filter devices are provided at the suction port 11 and the exhaust port 15. A wind wall forming device 2 is provided on the outer periphery of the housing 1 behind the suction port 11. This device includes a side air outlet 29 and a blower 25 that blows air into the side air outlet 29. The side air outlet 29 is independent of the smoke-smoking channel. A side air outlet 21 is provided on the upper side of the side air outlet 29. The side air outlet 21 is independent of the exhaust port 15. The airflow blown from the side air outlet 21 forms a wind wall. The blower 25 is located on the outer side of the housing 1.

[0048] The side air outlet 21 is slit-shaped, and the angle α between the two ends of the side air outlet 21 and the central axis of the housing 1 is 180 degrees (180 degrees is only a preferred angle at present, but it is not limited to this angle; it can be 90-360 degrees). The bottom of the housing 1 is also provided with a bracket connection position 14.

[0049] The housing 1 is cylindrical. The smoke extraction channel includes an air duct 17 and a smoke extraction fan. The air duct 17, pointing forward and backward, is formed inside the housing 1. The smoke extraction fan is disposed within the air duct 17. The front and rear ends of the air duct 17 are the suction port 11 and the exhaust port 15, respectively. The side air outlet 21 is located in front of the exhaust port 15. The air supply fan is disposed at the bottom of the housing 1. The smoke extraction fan includes an impeller 61 and a motor 62. The impeller 61 and the motor 62 are connected by a drive. A motor frame 12 is provided inside the air duct 17, and the motor 62 is mounted on the motor frame 12. A wire groove 16 is provided on the motor frame 12, which leads to the bracket connection position 14. The bracket connection position 14 is close to the air supply fan 25, facilitating the passage of wires connecting the air supply fan 25 and the smoke extraction fan through the wire groove 16.

[0050] The air supply fan and the smoke extraction fan are connected in parallel; or, the air supply fan and the smoke extraction fan are controlled independently of each other.

[0051] The rear end of the housing 1 is provided with a collar 27, which, together with the housing 1, forms the side air outlet channel 29. The upper and lower sides of the collar 27 are respectively provided with a side air outlet 21 and an air inlet 28. The air wall forming device also includes a pipe 26, in which a blower is installed. One end of the pipe 26 is connected to the air inlet 28 of the side air outlet channel 29, and the other end of the pipe 26 is an air intake 22 connected to the outside. The end of the pipe 26 connected to the air inlet 28 is also provided with a wire hole 23, allowing a wire drawn from the wire trough 16 to pass through the wire hole 23 and electrically connect to the blower 25 inside the pipe 26.

[0052] The inner wall of the exhaust port 15 is tapered, wider at the front end and narrower at the back end.

[0053] The rear end of the housing 1 is provided with a reduced diameter sleeve 13, and the inner side of the reduced diameter sleeve 13 forms the conical exhaust port 15. The outer periphery of the reduced diameter sleeve 13 is also provided with a support plate. The collar 27 includes a wall panel and a rear end ring surface. The center of the rear end ring surface forms a clearance opening, which is opposite to the exhaust port 15. The inner end of the rear end ring surface abuts against the rear end of the support plate, and the front end of the wall panel abuts against the front end of the support plate. The support plate, the wall panel, and the inner end of the rear end ring surface together form the side air outlet channel 29. The upper end of the wall panel is provided with a notch, which forms the side air outlet 21.

[0054] The front end of the suction port 11 is also provided with a smoke collection hood 4, and the smoke collection hood 4 is provided with the filter device, which is a primary filter screen 5.

[0055] The filtration device is provided outside the exhaust port 15, and the filtration device is the main filter element 3 or the main filter screen.

[0056] The main filter element 3 includes a cylindrical filter element or filter screen 31, and a conical guide shroud 32 is provided inside the filter element or filter screen 31. The tip of the conical guide shroud 32 points towards the exhaust port 15. The conical guide shroud 32 can change the direction of the exhaust airflow from horizontal to vertical, thereby contacting and filtering the filter element or filter screen 31.

[0057] The primary filter 5 mainly separates oil particles from smoke in the cooking fumes, while the smoke is mainly filtered by the main filter element 3. The primary filter 5 can be composed of multiple mesh panels stacked together. After the inhaled cooking fumes collide with the primary filter 5, the oil particles in the cooking fumes remain on the primary filter 5, and after accumulating to a certain amount, they drip off.

[0058] Combination Figure 7 and Figure 8 As shown, the filter device 3 also includes a front cover ring 34 and a rear cover ring 33. The rear cover ring 33 is connected to the outer periphery of the wide end of the guide cone 32. The cylindrical filter layer 31 is disposed between the front cover ring 34 and the rear cover ring 33. The filter device 3 is detachably connected to the desktop range hood 10 through the front cover ring 34.

[0059] The rear end of the front cover ring 34 and the front end of the rear cover ring 33 are both provided with annular grooves 331, and the end of the cylindrical filter layer 31 is inserted into the annular grooves 331.

[0060] The cylindrical filter layer 31 is a pleated filter cotton.

[0061] Combination Figure 9 As shown, the filter device 3 is magnetically connected to the desktop range hood 10. Specifically, a magnet 36 is provided on the collar 33, and an iron block 37 is correspondingly provided on the front cover ring 34 of the filter device 3. The filter device 3 is magnetically connected to the magnet 36 through the iron block 37.

[0062] join Figure 10 and Figure 11 As shown, the filter device 3 is fastened to the desktop range hood 10. Specifically, the collar 33 has two or more fastening holes 331 evenly distributed around its center, and the front cover ring 34 of the filter device 3 is correspondingly provided with a buckle 342, which engages with the fastening holes 331 by twisting. The wall surface of the fastening hole 331 is also provided with a backstop protrusion 332.

[0063] join Figures 12-14 As shown, the filter device 3 also includes a cage 37, the end of which is inserted into the annular groove 331, and the cylindrical filter layer 31 is wrapped around the cage 37.

[0064] The cage frame 37 includes a front cover ring 372, a rear cover ring 573, and a rib 371 connecting the front cover ring 372 and the rear cover ring 373.

[0065] The cylindrical filter layer 31 is formed by a filter screen and is wrapped around the outer periphery of the cage 37; the two ends of the filter screen overlap each other.

[0066] See Figure 15 As shown, the front cover ring at the front end of the cage frame 37 is removed, and the front end of the cage frame 37 is integrally formed with the front cover ring 34. Alternatively, see... Figure 16 As shown, the rear cover ring at the rear end of the cage frame 37 is removed, and the rear end of the cage frame 37 is integrally formed with the rear cover ring 33.

[0067] Example 2 differs from Example 1 in that: [Participants...] Figures 17 to 20 As shown, the housing 1 is mounted on the support base 7, and the air supply fan 25 of the air wall forming device 2 is mounted inside the support base 7.

[0068] A blower device is provided to supply air to the side air outlet 23, and the blower device is equipped with a blower 5.

[0069] The airflow forming device also includes a duct 26, within which a blower 25 is disposed. The upper end of the duct 26 is connected to the side air outlet channel 29. The blower 25 is located near the lower part of the support base 7 and is connected to the duct 26 via a nozzle 261. The nozzle 261 is wider at the end facing the blower 25 and narrower at the end connected to the duct 26. The nozzle 261 helps to compress the airflow blown by the blower 25, allowing it to be delivered to a farther location and increasing the air pressure, thereby improving the airflow's ability to prevent oil fume escape.

[0070] The support base 7 includes a sleeve 73 and a base 72. The sleeve 73 is disposed on the base 72. The base is provided with an air inlet 71. When the blower 25 is working, outside air is drawn in through the air inlet 71 and then sent to the side air outlet channel 29 through the nozzle 261 and the pipe 26 in sequence.

[0071] The wind wall forming device is suspended inside the support base 7. A hinge seat 271 is provided at the bottom of the housing 1 (in this embodiment, the bottom of the collar 27 on the housing 1). The sleeve 73 of the support base 7 is rotatably engaged with the hinge seat 271. The rotatable engagement can be a relatively tight fit; by forcefully swinging the housing, rotation can be achieved (see...). Figure 20 (As shown by the arrow R in the middle), without applying a swinging force, it can stop under the action of friction.

[0072] As another further implementation method, see Figure 21 and Figure 22 As shown, the sleeve 73 includes a fixed tube 732 and a movable tube 731 that are telescopically connected to each other. The fixed tube 732 is connected to the base 72, and the upper end of the movable tube 731 is rotatably engaged with the hinge seat 271. Therefore, the casing 1 of the smoke hood can move up and down in the direction of arrow H, and can also swing in the direction of arrow R.

[0073] Example 3 differs from Example 1 in that: See Figure 23 As shown, the front end of the desktop range hood is provided with a sleeve 8, and the rear end of the sleeve 8 is connected to the fixed suction port 11; the sleeve 8 is in a telescopic cooperation with the desktop range hood. The telescopic movement direction of the sleeve 8 is shown in [the diagram]. Figure 23 As indicated by the L-shaped arrow.

[0074] The sleeve 8 is generally in the shape of a straight cylindrical tube; or, the front and rear ends of the sleeve 8 are respectively flared and straight cylindrical tubes, resulting in a wider smoke collection range, see Figure 24 As shown; or, the sleeve 8 is a straight cylindrical shape with a slanted opening at the front end, the upper end of which extends forward to reduce the upward escape of oil fumes, see... Figure 25 As shown.

[0075] In this embodiment, the sleeve 8 is fitted onto the front end of the smoke hood 4.

[0076] As a further alternative, see Figure 26 As shown, the sleeve 8 directly engages with the suction port 11 at the front end of the housing 1 (eliminating the smoke hood), and the sleeve 8 is a telescopic tube (corrugated tube).

[0077] As a further option, the primary filter 5 can be replaced by being located at the active suction port 221 to reduce the accumulation of oil fumes on the inner wall of the sleeve 8.

[0078] The desktop range hoods of embodiments 1-3 described above can be further improved in the following way: Specifically, by combining... Figure 28 As shown, the rear end of the range hood body 1 is also provided with a mesh cover 40 corresponding to the outer side of the filter element, and the mesh cover 40 is separately connected to the range hood body 1.

[0079] The smoke hood 4 or the housing 1 is provided with an oil drain hole 41 below the primary filter 5, and an oil cup 42 is provided below the oil drain hole 41.

[0080] The main body 1 of the range hood is also provided with a decorative sleeve 30, which also covers the outside of the oil collection cup 42.

[0081] The decorative sleeve 30 includes a rear sleeve and a front sleeve. The rear sleeve mainly covers the outer shell 11 of the range hood body 1 and the air wall forming device 2. The rear sleeve also has a strip-shaped opening corresponding to the side air outlet 21. The front sleeve mainly covers the oil collection cup 42 and the smoke collection hood 4.

[0082] Example 4 differs from Example 1 in that: See [link to example 1] Figure 27 As shown, the desktop range hood 10 is rotatably engaged with the electric heating cooker 20 via a bracket 9, allowing the bracket 9 and the desktop range hood 10 to swing in the direction of arrow R1 for storage. The upper end of the bracket 9 is rotatably engaged with the desktop range hood 10, and its rotation can include horizontal rotation in the direction of arrow R2 to change the orientation of the desktop range hood 10, so that it can face the electric heating cooker 20 or face other positions besides the electric heating cooker 20; it can also simultaneously include vertical swinging in the direction of arrow R3 to change the orientation of the suction port 11.

[0083] The above describes the preferred embodiments of the present invention, illustrating and describing the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A high-efficiency desktop range hood, comprising a casing and a filtering device for filtering oil fume, the casing being provided with a smoke suction passage, the casing being provided with a suction port and an exhaust port at its front and rear ends respectively, the suction port and the exhaust port being in communication with the smoke suction passage, characterized in that: The outer periphery of the casing is provided with a side air outlet channel corresponding to the rear of the suction port, the side air outlet channel is independent of the smoke suction channel, the side air outlet channel is provided with a side air outlet, the side air outlet blows air flow to form a wind wall, and the side air outlet channel is further provided with an air inlet for connecting with a positive pressure air source.

2. The high efficiency desktop evaporative air cleaner of claim 1 wherein: The casing is in a cylindrical shape, the smoke suction channel comprises an air duct and a smoke suction fan, the air duct is formed in the casing and points forward and backward, the smoke suction fan is arranged in the air duct, the front and rear ends of the air duct are the suction port and the exhaust port respectively, and the side air outlet is located in front of the exhaust port.

3. The high efficiency desktop evaporative air cleaner of claim 1 wherein: The rear end of the casing is provided with a sleeve ring, the sleeve ring and the casing surround the side air outlet channel, the upper and lower sides of the sleeve ring are respectively provided with the side air outlet and the air inlet; the side air outlet is in a strip seam shape, and the included angle α between the two ends of the side air outlet to the center axis of the casing is 90-180 degrees.

4. The high efficiency desktop evaporative air cleaner of claim 1 wherein: The inner wall of the exhaust port is in a tapered shape with a wide front end and a narrow rear end.

5. The high efficiency desktop evaporative air cleaner of claim 1 wherein: The positive pressure air source comprises a air supply channel and an air supply fan, the air supply fan is arranged in the air supply channel, the air supply channel is provided with a blowing port and an air inlet in communication therewith, the blowing port is in communication with the air inlet of the side air outlet channel, and the air inlet is in communication with the outside; the air supply fan is connected in parallel with the smoke suction fan; or, the air supply fan and the smoke suction fan are independently controlled.

6. The high efficiency desktop evaporative air cleaner of claim 1 wherein: The front end of the casing corresponding to the suction port is provided with a smoke collection cover; or, the front end of the casing corresponding to the suction port is directly or through the smoke collection cover in telescopic cooperation with the sleeve pipe, and the sleeve pipe is directly or through the smoke collection cover in communication with the suction port.

7. The high efficiency desktop evaporative air cleaner of claim 1 wherein: The filter device comprises a primary filter screen arranged at the fixed suction port.

8. The high efficiency desktop evaporative air cleaner of claim 1 wherein: The filter device comprises a high-efficiency filter element, the high-efficiency filter element comprises a cylindrical filter layer and a flow guide cone, one end of the cylindrical filter layer is a cylinder port facing the exhaust port, the flow guide cone is arranged in the cylindrical filter layer, a pointed end of the flow guide cone points to the exhaust port and extends to the one end cylinder port of the cylindrical filter layer, and a wide end of the flow guide cone blocks the other end cylinder port of the cylindrical filter layer.

9. The high efficiency desktop evaporative air cleaner of claim 5 wherein: The air supply channel points forward and backward; the bottom of the casing is further provided with a support connecting seat; or, the casing is arranged on the support seat, and the air supply channel points upward and downward and is arranged in the support seat.

10. The high efficiency desktop evaporative air cleaner of claim 5 wherein: The tabletop smoke machine is connected with the electric heating cooker through the support.

Images