Smoke hood machine with self-cleaning function

Abstract

The invention discloses a hood machine with a self-cleaning function, which comprises a hood machine body, a purification module shell and a multi-blade switch valve, the purification module shell is installed on the hood machine body, the purification module shell is provided with an air inlet and an air outlet, the multi-blade switch valve is installed on the air inlet and / or the air outlet, and the multi-blade switch valve is installed on the air inlet and / or the air outlet. An electrostatic electric field and an exhaust fan are sequentially arranged in the direction from the air inlet to the air outlet, and one or more steam inlets are formed in the purification module shell. During self-cleaning, the exhaust fan is in a closed state, the multi-blade switch valve closes the air inlet and / or the air outlet, steam is introduced through the steam inlet, the steam is introduced into the purification module shell and the electrostatic electric field, and oil stains on the inner wall of the purification module shell and the electrostatic electric field are dissolved through the steam; during working, the exhaust fan is in a starting state, and the multi-blade switch valve is automatically opened. According to the smoke hood machine with the self-cleaning function, the function of automatically cleaning and purifying the interior of the module shell and the electrostatic electric field is achieved, and the cleaning efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of smoke hood machines, and in particular to a smoke hood machine with a self-cleaning function. Background Art

[0002] A large amount of oil smoke is generated during the cooking process. In order to reduce the harm of oil smoke to people's health, a fume hood is usually installed on the stove to extract the exhaust gas generated by the stove combustion and the oil smoke generated by the cooking process and discharge them outdoors.

[0003] The hood machine is provided with a shell and an electrostatic field in the shell. When the oil fume exhaust gas passes through the electrostatic field, the smoke is ionized under the action of the high voltage field and adsorbed on the electrode plate to purify the smoke. After the hood machine has been used for a period of time, a large amount of oil stains will gradually adhere to the inner wall of the shell and the electrostatic field. Since the oil stains have strong adhesion and the internal structure of the hood machine is complex, cleaning becomes extremely difficult. Most existing cleaning methods are manual cleaning, which requires the electrostatic field to be removed from the equipment for cleaning. Manual cleaning is inefficient and it is difficult to clean the inside of the shell.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a hood machine with a self-cleaning function, aiming to solve the technical problems in the prior art that the electrostatic field needs to be disassembled for cleaning and the cleaning inside the shell is difficult.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A hood machine with a self-cleaning function comprises a hood machine body, a purification module shell and a multi-leaf switch valve, wherein the purification module shell is mounted on the hood machine body, the purification module shell is provided with an air inlet and an air outlet, the multi-leaf switch valve is mounted on the air inlet and / or the air outlet, an electrostatic electric field and an exhaust fan are sequentially arranged along the direction from the air inlet to the air outlet, and the purification module shell is provided with more than one steam inlet; during self-cleaning, the exhaust fan is in a closed state, the multi-leaf switch valve closes the air inlet and / or the air outlet, steam is introduced through the steam inlet, and the steam is introduced into the purification module shell (2) and the electrostatic electric field (4) to dissolve the oil stains on the inner wall of the purification module shell and the electrostatic electric field; during operation, the exhaust fan is in an open state, and the multi-leaf switch valve automatically opens.

[0008] Furthermore, the multi-leaf switch valve includes a frame and a plurality of connecting rods rotatably connected to the frame, each connecting rod being provided with a blade; the connecting rod is arranged at a non-centerline position of the blade, and / or the weight of one side of the blade is greater than the weight of the other side; under the action of negative pressure, the plurality of blades rotate to a vertical state, and after the negative pressure disappears, the plurality of blades rotate to a horizontal state due to their own weight.

[0009] Furthermore, when the blades are in a horizontal state, there is a gap between two adjacent blades.

[0010] Furthermore, a rotating part is provided at the end of the connecting rod, and the rotating part is a cylindrical structure. A right-angle limiting part is provided on the peripheral wall of the rotating part, and two side edges of the right-angle limiting part are respectively tangent to the peripheral wall of the rotating part; a square hole is opened on the inner side of the frame, and the square hole is used to limit the rotation center position of the connecting rod; and a special-shaped hole is opened on the outer side of the frame, and the special-shaped hole is used to limit the rotation direction of the rotating part.

[0011] Furthermore, the blade is provided with a first V-shaped bending portion extending along its length direction, and the ends of the first V-shaped bending portion are provided with a plurality of second V-shaped bending portions opposite to the first V-shaped bending portion, the connecting rod is slidably connected to the second V-shaped bending portion, and the blade is provided with a plug body for limiting the movement of the connecting rod.

[0012] Furthermore, the inner wall of the frame is provided with a plurality of support rods for limiting the blades to maintain a horizontal state.

[0013] Furthermore, a support frame is provided in the purification module shell, and a plurality of parallel oil collecting grooves and oil guide grooves are provided at the ends of the plurality of oil collecting grooves at the bottom of the support frame. The oil guide groove has a first oil drain hole connected to the oil collecting groove, and a second oil drain hole is provided on the oil guide groove.

[0014] Furthermore, there are more than two electrostatic electric fields, and the steam inlet is arranged toward the electrostatic electric field, and / or the steam inlet is located between two electrostatic electric fields.

[0015] Furthermore, the outer wall of the purification module shell is provided with thermal insulation cotton.

[0016] Beneficial effects:

[0017] The present invention provides a smoke hood machine with a self-cleaning function. By setting a multi-leaf switch valve, the multi-leaf switch valve automatically opens and closes the air inlet and the air outlet under the start and stop of the exhaust fan. During self-cleaning, the multiple leaves on the multi-leaf switch valve rotate to a horizontal state due to their own weight, the air inlet and the air outlet are closed, and a closed space is formed inside the purification module shell. Steam enters the purification module shell through multiple steam inlets and dissolves the oil stains to achieve the function of automatically cleaning the inside of the purification module shell and the inside of the electrostatic electric field. The cleaning efficiency is high, and during the cleaning process, a slightly positive pressure state is formed inside the purification module shell, which is conducive to the discharge of the dissolved oil stains outside the purification module shell. When purifying smoke, the exhaust fan is started to form a negative pressure inside the purification module shell. The multiple leaves on the multi-leaf switch valve rotate to a vertical state under the action of the negative pressure. The smoke passes through the air inlet, the electrostatic electric field, and the exhaust fan in sequence and is discharged from the air outlet to achieve the purification of smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front view of a hood machine with a self-cleaning function provided by the present invention;

[0019] Figure 2 A structural diagram of a multi-leaf switch valve in a hood machine with a self-cleaning function provided by the present invention in a closed state;

[0020] Figure 3 A structural diagram of a multi-leaf switch valve in an open state in a hood machine with a self-cleaning function provided by the present invention;

[0021] Figure 4 A cross-sectional view of a multi-leaf switch valve in a hood machine with a self-cleaning function provided by the present invention;

[0022] Figure 5 A schematic diagram of the connection between the connecting rod and the square hole in the hood machine with self-cleaning function provided by the present invention;

[0023] Figure 6 Schematic diagram of the connection between the connecting rod and the special-shaped hole in the smoke hood machine with self-cleaning function provided by the present invention Figure 1 ;

[0024] Figure 7 Schematic diagram of the connection between the connecting rod and the special-shaped hole in the smoke hood machine with self-cleaning function provided by the present invention Figure 2 ;

[0025] Figure 8 An exploded view of a multi-leaf switch valve in a hood machine with a self-cleaning function provided by the present invention;

[0026] Fig. 9 The structure of the connecting rod in the smoke hood machine with self-cleaning function provided by the present invention Figure 1 ;

[0027] Fig.10 The explosion of the connecting rod in the smoke hood machine with self-cleaning function provided by the present invention Figure 1 ;

[0028] Fig.11 A cross-sectional view of a connecting rod in a fume hood machine with a self-cleaning function provided by the present invention;

[0029] Fig.12 The structure of the connecting rod in the smoke hood machine with self-cleaning function provided by the present invention Figure 2 ;

[0030] Fig.13 The explosion of the connecting rod in the smoke hood machine with self-cleaning function provided by the present invention Figure 2 ;

[0031] Fig.14 The local structure of the shell of the purification module in the fume hood machine with self-cleaning function provided by the present invention Figure 1 ;

[0032] Fig.15 The local structure of the shell of the purification module in the fume hood machine with self-cleaning function provided by the present invention Figure 2 ;

[0033] Fig.16 The local structure of the shell of the purification module in the fume hood machine with self-cleaning function provided by the present invention Figure 3 .

[0034] Figure numerals: hood body 1, purification module shell 2, air inlet 21, air outlet 22, support frame 23, oil collecting groove 24, oil guide groove 25, first oil drain hole 26, second oil drain hole 27, multi-leaf switch valve 3, frame 31, square hole 311, special-shaped hole 312, connecting rod 32, rotating part 321, right-angle limiting part 322, blade 33, first V-shaped bending part 331, second V-shaped bending part 332, mounting hole 333, third V-shaped bending part 334, plug body 34, plug block 341, support rod 35, electrostatic electric field 4, exhaust fan 5, steam inlet 6. DETAILED DESCRIPTION

[0035] The present invention provides a hood machine with a self-cleaning function. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", etc., which indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] See also Figure 1 , 2 , 3, 14, 16, the present invention provides a fume hood machine with a self-cleaning function, comprising a fume hood machine body 1, a purification module shell 2 and a multi-leaf switch valve 3, the purification module shell 2 is mounted on the fume hood machine body 1, the purification module shell 2 is provided with an air inlet 21 and an air outlet 22, the multi-leaf switch valve 3 is mounted on the air inlet 21 and / or the air outlet 22, an electrostatic electric field 4 and an exhaust fan 5 are sequentially arranged along the direction from the air inlet 21 to the air outlet 22, and one or more steam inlets 6 are provided on the purification module shell 2; during self-cleaning, the exhaust fan 5 is in a closed state, the multi-leaf switch valve 3 closes the air inlet 21 and / or the air outlet 22, steam is introduced through the steam inlet 6, and the steam passes into the purification module shell 2 and the electrostatic electric field 4 to dissolve the oil stains on the inner wall of the purification module shell 2 and the electrostatic electric field 4; during operation, the exhaust fan 5 is in an open state, and the multi-leaf switch valve 3 opens automatically.

[0038] In one embodiment, the multi-leaf switching valve 3 is installed in the air inlet 21. When cleaning the interior of the purification module shell 2 and the electrostatic electric field 4, the multi-leaf switching valve 3 closes the air inlet 21 to form a relatively closed space inside the purification module shell 2, and the high-temperature steam entering through the steam inlet 6 can fill the entire interior of the purification module shell 2.

[0039] In another embodiment, the multi-leaf switching valve 3 is installed at the air outlet 22. When cleaning the interior of the purification module shell 2 and the electrostatic electric field 4, the multi-leaf switching valve 3 closes the air outlet 22 to form a relatively closed space inside the purification module shell 2, and the high-temperature steam entering through the steam inlet 6 can fill the entire interior of the purification module shell 2.

[0040] In another embodiment, if Figure 1As shown, there are two multi-leaf switch valves 3, which are respectively installed at the air inlet 21 and the air outlet 22. When cleaning the interior of the purification module shell 2 and the electrostatic electric field 4, the two multi-leaf switch valves 3 close the air inlet 21 and the air outlet 22 respectively, so that a completely enclosed space is formed inside the purification module shell 2, and the high-temperature steam entering through the steam inlet 6 can fill the entire interior of the purification module shell 2.

[0041] In this embodiment, two multi-leaf switch valves 3 are used for illustration. During the fume purification process, the exhaust fan 5 is started to generate negative pressure inside the purification module housing 2, and the multi-leaf switch valve 3 automatically opens under the action of the negative pressure, and the air inlet 21 and the air outlet 22 are both in an open state. The fume enters the purification module housing 2 from the air inlet 21, and is discharged from the air outlet 22 after being purified by the electrostatic field 4, thereby achieving fume purification.

[0042] After a period of use, the exhaust fan 5 is turned off, the negative pressure disappears, the two multi-leaf switch valves 3 are automatically closed due to their own weight, and the air inlet 21 and the air outlet 22 are both in a closed state, so that a completely enclosed space is formed inside the purification module shell 2. Steam enters the purification module shell 2 from multiple steam inlets 6, and the high-temperature steam dissolves the oil stains adhering to the inner wall of the purification module shell 2, the electrostatic electric field 4 and other components inside the purification module shell 2. The dissolved oil stains will automatically flow downward, thereby realizing the self-cleaning function of the hood machine. Compared with the prior art, when cleaning, there is no need to disassemble the purification module shell 2, and its inner wall and electrostatic electric field 4 can be automatically cleaned, with high cleaning efficiency and simple operation.

[0043] By arranging the multi-leaf switch valve 3 at the air inlet 21 and / or the air outlet 22, the air inlet 21 and / or the air outlet 22 can be automatically opened and closed under the influence of the exhaust fan 5, so that during self-cleaning, the exhaust fan 5 is turned off, the air inlet 21 and / or the air outlet 22 are closed, and a sealed space is formed inside the purification module housing 2; while during purification work, the exhaust fan 5 is started, and the air inlet 21 and the air outlet 22 are opened. There is no need to use an additional power mechanism to drive the multi-leaf switch valve 3 to move, and only the start and close of the exhaust fan 5 is used to cause the multi-leaf switch valve 3 to move, so the movement is reliable and energy-saving.

[0044] In a preferred embodiment, see Figure 2 , 3 8. The multi-leaf switch valve 3 includes a frame 31 and a plurality of connecting rods 32 rotatably connected to the frame 31. Each connecting rod 32 is provided with a blade 33. Each blade 33 rotates around the axis of the connecting rod 32. The blade 33 can rotate to a vertical state and a horizontal state. When the plurality of blades 33 are in a vertical state, the air inlet 21 and the air outlet 22 are opened. When the plurality of blades 33 are in a horizontal state, the air inlet 21 and the air outlet 22 are closed.

[0045] The connecting rod 32 is arranged at a non-centerline position of the blade 33, and / or the weight of one side of the blade 33 is greater than the weight of the other side. Specifically, the connection structure of the connecting rod 32 and the blade 33 has the following three modes: the connecting rod 32 is arranged at a non-centerline position of the blade 33; the connecting rod 32 is arranged at the centerline position of the blade 33, and the weight of one side of the blade 33 is greater than the weight of the other side; Figure 5 As shown, the connecting rod 32 is located at a non-centerline position of the blade 33, and the weight of one side of the blade 33 is greater than the weight of the other side. Through the above-mentioned settings, the blades 33 are rotated to a horizontal state under the action of their own weight. Under the action of negative pressure, multiple blades 33 rotate to a vertical state, and the blades 33 in the vertical state do not affect the smoke entering the purification module shell 2, and being discharged from the purification module shell 2; after the negative pressure disappears, multiple blades 33 rotate to a horizontal state due to their own weight, and the blades 33 in the horizontal state are used to close the purification module shell 2.

[0046] In the above description, one side of the blade 33 is folded in half so that the weight of the side is greater than the weight of the other side.

[0047] In the above description, the structure of the frame 31 is preferably rectangular, so as to ensure that the plurality of horizontal blades 33 can close the air inlet 21 and the air outlet 22 .

[0048] Further, see Figure 4 When the blades 33 are in a horizontal state, there is a gap between two adjacent blades 33. Since oil stains have strong stickiness and adhesion, by setting the gap, the two blades 33 can be prevented from sticking together and being unable to rotate.

[0049] In a preferred embodiment, see Figure 5-8 The end of the connecting rod 32 is provided with a rotating part 321, which is a cylindrical structure. The peripheral wall of the rotating part 321 is provided with a right-angled stopper 322, and the two sides of the right-angled stopper 322 are respectively tangent to the peripheral wall of the rotating part 321; the inner side of the frame 31 is provided with a square hole 311, and the square hole 311 is used to limit the rotation center position of the connecting rod 32, and the outer side of the frame 31 is provided with a special-shaped hole 312, and the special-shaped hole 312 is used to limit the rotation direction of the rotating part 321. Specifically, as Figure 5 As shown, the square hole 311 is tangent to the peripheral wall of the connecting rod 32, and the center of the square hole 311 is located on the axis of the connecting rod 32, so that the connecting rod 32 can only rotate around its axis without translational movement. Figure 6 , 7As shown, the special-shaped hole 312 includes three straight edges and a semicircular arc, the diameter of the semicircular arc is the same as the diameter of the rotating part 321, and the area surrounded by the three straight edges is used to limit the moving direction of the right-angle limit part 322, so that the connecting rod 32 can only rotate 90° around its axis in the positive and negative rotation directions.

[0050] In one embodiment, Figure 8 As shown, the connecting rod 32 and the blade 33 are fixedly connected, and the connection method can be welding fixation or screw fixation, and the structure is stable.

[0051] In another embodiment, see Fig. 9 , 10 , 12, 13, the connection between the connecting rod 32 and the blade 33 is detachable. The blade 33 is provided with a first V-shaped bending portion 331 extending along the length direction thereof, and the first V-shaped bending portion 331 can improve the structural strength of the blade 33; the ends of the first V-shaped bending portion 331 are provided with a plurality of second V-shaped bending portions 332 which are opposite to the first V-shaped bending portion 331, and the connecting rod 32 is slidably connected with the second V-shaped bending portion 332. On the vertical projection plane, the first V-shaped bending portion 331 and the second V-shaped bending portion 332 form a quadrilateral structure, and the connecting rod 32 is slidably connected with the quadrilateral structure to limit the connection rod 32 and the blade 33 to only relative translation movement, and no relative rotation movement. The blade 33 is provided with a plug body 34 for limiting the movement of the connecting rod 32. During assembly, the two connecting rods 32 are respectively inserted into the quadrilateral structure without exceeding the end of the blade 33, and then the blade 33 is installed in the frame 31, and the rotating part 321 is aligned with the square hole 311 and the connecting rod 32 is pushed in, so that the rotating part 321 is installed on the frame 31, and finally the plug body 34 is installed to limit the axial movement of the connecting rod 32 and prevent the rotating part 321 from exiting the square hole 311. During disassembly, the plug body 34 is removed and the connecting rod 32 is pushed to move so that the rotating part 321 exits the square hole 311. Through the above arrangement, the assembly and disassembly of the blade 33 can be facilitated, which is conducive to replacing the blade 33.

[0052] Optionally, see Figure 9-11 The blade 33 is provided with a mounting hole 333 , and the plug body 34 is provided with an insert block 341 which can be inserted into the mounting hole 333 to achieve stable installation of the plug body 34 . After installation, the plug body 34 abuts against the end of the connecting rod 32 .

[0053] Optionally, see Fig.12 , 13 A third V-shaped bending portion 334 is provided on the first V-shaped bending portion 331 in the same direction as the second V-shaped bending portion 332 , and the plug body 34 is clamped on the two third V-shaped bending portions 334 to achieve stable installation of the plug body 34 . After installation, the plug body 34 abuts against the end of the connecting rod 32 .

[0054] It should be noted that the cross-sectional area of ​​the connecting rod 32 is larger than the cross-sectional area of ​​the rotating portion 321, so that the connecting rod 32 cannot extend into the square hole 311. Therefore, the square hole 311 and the plug body 34 cooperate to limit the axial movement of the connecting rod 32 to ensure the stability of the installation of the connecting rod 32 and the blade 33.

[0055] In a preferred embodiment, the inner wall of the frame 31 is provided with a plurality of support rods 35 for limiting the blades 33 to maintain a horizontal state. Figure 4 As shown, the support rods 35 on both sides of the frame 31 are L-shaped structures. The support rods 35 not only keep the blades 33 on both sides in a horizontal state, but also cooperate with the multiple blades 33 to close the air inlet 21 or the air outlet 22. The support rod 35 in the middle is a short column. The two ends of the blade 33 in the middle correspond to two short columns respectively. The short columns hold up the ends of the blade 33. The support rod 35 not only keeps the blade 33 in the middle in a horizontal state, but also avoids affecting the smoothness of the gas entering or exiting the purification module housing 2.

[0056] In a preferred embodiment, see Figure 14-16 The purification module housing 2 is provided with a support frame 23, and the bottom of the support frame 23 is provided with a plurality of oil collecting grooves 24 arranged in parallel and an oil guide groove 25 arranged at the ends of the plurality of oil collecting grooves 24, and the oil guide groove 25 is provided with a first oil drain hole 26 connected to the oil collecting groove 24, and a second oil drain hole 27 is provided on the oil guide groove 25. After the steam dissolves the oil stains adhering to the inner wall of the purification module housing 2 and the electrostatic electric field 4, the liquid oil stains slide down and gather on the plurality of oil collecting grooves 24. Preferably, the oil collecting grooves 24 are arranged obliquely, and the oil stains flow to the oil guide groove 25 through the first oil drain hole 26 under the guidance of the oil collecting groove 24, and finally discharge downward through the second oil drain hole 27. Since the high-temperature steam fills the entire interior of the purification module housing 2, the interior is maintained in a state of slight positive pressure, and the second oil drain hole 27 is in an atmospheric pressure environment, the slightly positive pressure steam can not only dissolve the oil stains, but also promote the oil stains accumulated in the oil guide groove 25 to flow toward the second oil drain hole 27, so as to facilitate oil drainage.

[0057] In the above, the air inlet 21 is located beside the multiple oil collecting grooves 24, and the air outlet 22 is located above the end of the purification module housing 2 away from the air inlet 21, providing a longer flow path for the flue gas. The electrostatic field 4 is located above the multiple oil collecting grooves 24, and the oil dissolved by the steam directly falls down into the oil collecting grooves 24.

[0058] In the above, the hood body 1 is also provided with an oil receiving pan located below the purification module housing 2, and the oil is uniformly discharged out of the hood under the guidance of the oil receiving pan. The oil receiving pan and the oil discharge structure of the hood belong to the current technology, and its specific structure and working distance are not repeated.

[0059] In a preferred embodiment, see Figure 1 , 16 , there are more than two electrostatic electric fields 4. In the present embodiment, the electrostatic electric field 4 is a cylindrical electrostatic electric field. When the steam inlet 6 is arranged toward the electrostatic electric field 4, and the steam is blown toward the electrostatic electric field 4, the steam can directly act on the wall of the anode cylinder, and can quickly dissolve the oil stains adhering to the inner surface of the anode cylinder. When the steam inlet 6 is located between the two electrostatic electric fields 4, the steam can quickly fill the interior of the entire purification module shell 2 to quickly dissolve the oil stains adhering to the inner wall of the purification module shell 2, the oil stains on the electrostatic electric field 4, and the oil stains on the surfaces of other components in the purification module shell 2, thereby realizing the self-cleaning function of the fume hood machine, with high cleaning efficiency and simple operation.

[0060] According to actual needs, an appropriate number of steam inlets 6 are provided so that the steam can quickly fill the interior of the purification module housing 2 .

[0061] In a preferred embodiment, the outer wall of the purification module housing 2 is provided with heat-insulating cotton, so as to play a role of heat preservation and reduce heat loss when the hood machine is steam self-cleaning.

[0062] In summary, when the hood machine is self-cleaning, the present invention closes the air inlet 21 and / or the air outlet 22 through the multi-leaf switch valve 3 to form a sealed space inside the purification module shell 2, and the steam enters the purification module shell 2 through multiple steam inlets 6. Part of the steam is directly blown to the electrostatic field 4 to quickly dissolve the oil stains adhering to the electrostatic field 4, and part of the steam acts on the surface of the inner wall of the purification module shell 2 and other components to dissolve the oil stains on various surfaces. The dissolved oil stains flow downward and gather in the oil collecting tank 24, and then are discharged after passing through the first oil drain hole 26, the oil guide groove 25, and the second oil drain hole 27, thereby achieving the internal cleaning of the electrostatic field 4 and the purification module shell 2, with high cleaning efficiency and simple operation. In addition, after the steam fills the purification module shell 2, a slightly positive pressure state is formed inside it, which is conducive to the discharge of oil stains from the second oil drain hole 27.

[0063] When the smoke hood machine performs smoke purification, the exhaust fan 5 is started, so that negative pressure is formed inside the purification module shell 2, the multi-leaf switch valve 3 is automatically opened, and the smoke passes through the air inlet 21, the electrostatic field 4, the exhaust fan 5 in sequence and is discharged from the air outlet 22 to achieve smoke purification.

[0064] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. A hood machine with self-cleaning function, characterized in that: The invention comprises a hood machine body (1), a purification module shell (2) and a multi-leaf switch valve (3), wherein the purification module shell (2) is mounted on the hood machine body (1), the purification module shell (2) is provided with an air inlet (21) and an air outlet (22), the multi-leaf switch valve (3) is mounted on the air inlet (21) and / or the air outlet (22), an electrostatic electric field (4) and an exhaust fan (5) are sequentially arranged along the direction from the air inlet (21) to the air outlet (22), and the purification module shell (2) is provided with a plurality of air inlets (21) and an exhaust fan (5). One or more steam inlets (6) are provided; during self-cleaning, the exhaust fan (5) is in a closed state, the multi-leaf switch valve (3) closes the air inlet (21) and / or the air outlet (22), and steam is introduced through the steam inlet (6). The steam is used to pass into the interior of the purification module housing (2) and the interior of the electrostatic electric field (4) to dissolve the oil stains on the inner wall of the purification module housing (2) and the electrostatic electric field (4); during operation, the exhaust fan (5) is in an open state, and the multi-leaf switch valve (3) automatically opens.

2. The hood machine with self-cleaning function according to claim 1, characterized in that: The multi-leaf switch valve (3) comprises a frame (31) and a plurality of connecting rods (32) rotatably connected to the frame (31), each connecting rod (32) being provided with a blade (33); the connecting rod (32) being provided at a non-centerline position of the blade (33), and / or the weight of one side of the blade (33) being greater than the weight of the other side; under the action of negative pressure, the plurality of blades (33) rotate to a vertical state, and after the negative pressure disappears, the plurality of blades (33) rotate to a horizontal state due to their own weight.

3. The hood machine with self-cleaning function according to claim 2, characterized in that: When the blades (33) are in a horizontal state, there is a gap between two adjacent blades (33).

4. The hood machine with self-cleaning function according to claim 2, characterized in that: A rotating part (321) is provided at the end of the connecting rod (32), and the rotating part (321) is a cylindrical structure. A right-angle limiting part (322) is provided on the peripheral wall of the rotating part (321), and two side edges of the right-angle limiting part (322) are respectively tangent to the peripheral wall of the rotating part (321); a square hole (311) is opened on the inner side of the frame (31), and the square hole (311) is used to limit the rotation center position of the connecting rod (32); and a special-shaped hole (312) is opened on the outer side of the frame (31), and the special-shaped hole (312) is used to limit the rotation direction of the rotating part (321).

5. The hood machine with self-cleaning function according to claim 2, characterized in that: The blade (33) is provided with a first V-shaped bending portion (331) extending along its length direction, and the ends of the first V-shaped bending portion (331) are provided with a plurality of second V-shaped bending portions (332) opposite to the first V-shaped bending portions (331). The connecting rod (32) is slidably connected to the second V-shaped bending portions (332), and the blade (33) is provided with a plug body (34) for limiting the movement of the connecting rod (32).

6. The hood machine with self-cleaning function according to claim 2, characterized in that: The inner wall of the frame (31) is provided with a plurality of support rods (35) for limiting the blades (33) to maintain a horizontal state.

7. The hood machine with self-cleaning function according to claim 1, characterized in that: A support frame (23) is provided in the purification module housing (2), and a plurality of oil collecting grooves (24) arranged in parallel and an oil guide groove (25) arranged at the ends of the plurality of oil collecting grooves (24) are provided at the bottom of the support frame (23). The oil guide groove (25) is provided with a first oil discharge hole (26) connected to the oil collecting groove (24), and a second oil discharge hole (27) is provided on the oil guide groove (25).

8. The hood machine with self-cleaning function according to claim 1, characterized in that: There are more than two electrostatic electric fields (4), the steam inlet (6) is arranged toward the electrostatic electric field (4), and / or the steam inlet (6) is located between two electrostatic electric fields (4).

9. The hood machine with self-cleaning function according to claim 1, characterized in that: The outer wall of the purification module housing (2) is provided with thermal insulation cotton.

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