Indoor direct exhaust hood

Abstract

The invention relates to an indoor direct exhaust hood. The indoor direct exhaust hood comprises an exhaust fume collecting hood; the purifier is fixedly connected to the top of the exhaust fume collecting hood; the back plate is U-shaped and is fixedly connected to the bottom of the exhaust fume collecting hood; the oil collecting groove is formed in the back plate and corresponds to an oil falling opening in the bottom of the exhaust fume collecting hood; the connecting part is arranged on the inner wall of the back plate and is used for detachably supporting the oil collecting groove; a main driving unit is fixedly connected to the back face of the oil collecting groove, a transmission unit is arranged on the surface of the connecting part, and the main driving unit and the transmission unit are matched to form a tilting transmission pair. According to the invention, by arranging a tilting transmission pair formed by the main driving unit and the transmission unit, when the oil collecting groove is pulled forwards, the oil collecting groove is inclined firstly, oil in the oil collecting groove is poured and received at the moment, and then the oil collecting groove is continuously pulled, so that the oil collecting groove can be detached from the back surface for cleaning; the oil collecting groove can prevent oil from being scattered to a cooking bench due to carelessness when a user disassembles the oil collecting groove, and meanwhile, the oil collecting groove is in an inclined state firstly, so that the oil discharging efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of fume hood technology, and specifically to an indoor direct-exhaust fume hood. Background Technology

[0002] An indoor direct exhaust hood is a type of fume hood typically installed above a kitchen stove to collect cooking fumes, steam, odors, and heat. These fumes are filtered by internal grease and activated carbon filters before being directly discharged into the room.

[0003] A search revealed that Chinese patent CN 111664489 A discloses an integrated range hood with a simple structure that provides good support and positioning for the main internal components. It performs secondary treatment of oil fumes and has a good filtration effect. However, it has an oil collection tank at the bottom of the hood. When there is a lot of oil in the tank, the user needs to use both hands to support it during disassembly. This disassembly method requires the user to keep their hands steady, and if they are not careful, the oil in the collection tank can easily spill onto the stove, causing trouble.

[0004] To address the aforementioned problems, this invention proposes an indoor direct-exhaust smoke hood. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide an indoor direct exhaust hood to solve the above-mentioned technical problems.

[0006] To achieve the objectives of this invention, the technical solution adopted is as follows: An indoor direct-exhaust fume hood includes: a fume hood; a purifier fixedly connected to the top of the fume hood; a U-shaped back panel fixedly connected to the bottom of the fume hood; an oil collection tank disposed inside the back panel and corresponding to the oil drain at the bottom of the fume hood; and a connecting part disposed on the inner wall of the back panel for detachably supporting the oil collection tank. A main drive unit is fixedly connected to the back of the oil collection tank, and a transmission unit is disposed on the surface of the connecting part. The main drive unit and the transmission unit cooperate to form a tilting transmission pair. When the oil collection tank is pulled forward, the tilting transmission pair drives the connecting part and the oil collection tank to tilt to a preset angle, and disassembly can be completed only after further pulling.

[0007] Furthermore, the main drive unit is a helical rack fixedly connected to the back of the oil collection tank, the transmission unit is a helical gear disposed on the surface of the connecting part, the helical rack meshes with the helical gear, a one-way bearing is fixedly connected to the surface of the connecting part, and the helical gear is fixedly connected to the outer ring surface of the one-way bearing.

[0008] Furthermore, the connecting part includes a rotating shaft rotatably connected to the inner wall of the back plate, a protruding limiting strip is fixedly connected to the surface of the rotating shaft, a limiting sleeve is fixedly connected to the bottom of the oil collecting groove, a limiting groove adapted to the limiting strip is opened on the inner wall of the limiting sleeve, a stop block is fixedly connected to the surface of the rotating shaft, and a limiting block is fixedly connected to the inner wall of the back plate.

[0009] Furthermore, the surface of the rotating shaft is provided with a groove, and a plate-shaped stop body is slidably connected to the inner wall of the groove. A spring is provided in the groove, one end of the spring is fixedly connected to the stop body, and the other end of the spring is fixedly connected to the inside of the groove. The inner wall of the limiting sleeve is provided with a stop groove that matches the stop body.

[0010] Furthermore, a housing is fixedly connected to the back of the back plate, one end of the rotating shaft passes through the back of the back plate and extends into the interior of the housing, a coil spring is fixedly connected to the surface of the rotating shaft, and the end of the coil spring away from the rotating shaft is fixedly connected to the inner wall of the housing.

[0011] Furthermore, the inner bottom wall of the oil collecting trough is arc-shaped, and one end of the oil collecting trough is open to form an oil outlet. A fixed shaft is rotatably connected to the inner wall of the oil collecting trough, and a valve disc is rotatably connected to the surface of the fixed shaft. A counterweight is embedded inside the valve disc, and a first torsion spring is sleeved on the surface of the fixed shaft. One end of the first torsion spring is fixedly connected to the valve disc, and the other end of the first torsion spring is fixedly connected to the inner top wall of the oil collecting trough.

[0012] Furthermore, an arc-shaped guide rail is fixedly connected to the inner wall of the back plate, and a support shaft is slidably connected inside the arc-shaped guide rail. A connecting sleeve adapted to the support shaft is fixedly connected to the bottom of the oil collection groove, and the connecting sleeve is sleeved on the outside of the support shaft.

[0013] Furthermore, the back plate has an opening on the side near the oil outlet end of the oil collection tank. A column is fixedly connected to the inner wall of the opening. A rotating seat is rotatably connected to the surface of the column. An auxiliary shaft is fixedly connected to the connecting end of the rotating seat. The auxiliary shaft is cylindrical and fits against the bottom of the connecting sleeve. A second torsion spring is sleeved on the surface of the column. One end of the second torsion spring is fixedly connected to the rotating seat, and the other end of the second torsion spring is fixedly connected to the inner wall of the opening. An insertion hole is formed between the rotating seat and the inner wall of the opening.

[0014] Furthermore, it also includes an oil receiving groove, the top of which is fixedly connected to a plug plate. When the plug plate is inserted into the socket, the abutting surface of the rotating seat presses against the rear side of the plug plate.

[0015] Furthermore, an HG mechanical metal cyclone separator is fixedly connected inside the smoke collection hood. An inlet communicating with the purifier is formed on the top of the smoke collection hood. The purifier includes a housing fixedly connected to the top of the smoke collection hood. A mounting bracket is fixedly connected inside the housing. From left to right, a coarse pre-filter, an electrostatic filter, a high-efficiency filter, and an activated carbon filter are installed inside the mounting bracket. A fan is fixedly connected to one side of the mounting bracket. A BPCO plasma generator is fixedly connected to the inner wall of the housing. An air outlet is provided on the top of the housing. A panel is detachably connected to the front of the housing.

[0016] Beneficial effects: 1. In this invention, by setting up a tilting transmission pair formed by the main drive unit and the transmission unit, when the oil collection tank is pulled forward, the oil collection tank is first tilted. At this time, the oil in the oil collection tank is poured out and collected. Then, by continuing to pull the oil collection tank, the oil collection tank can be disassembled from the back for cleaning. This can prevent the user from accidentally spilling oil onto the stove when disassembling the oil collection tank. At the same time, the oil collection tank is tilted first, which can increase the pouring speed of the oil and improve the efficiency of oil drainage.

[0017] 2. In this invention, by pulling the oil collection groove forward, the oil collection groove drives the helical rack to move, the helical rack drives the helical gear to rotate counterclockwise, the helical gear drives the rotating shaft to rotate, and the rotating shaft drives the limiting sleeve to rotate under the cooperation of the limiting strip and the limiting groove. The limiting sleeve drives the oil collection groove to rotate to a preset angle. At this time, the stop block rotates with the rotating shaft to the position of pressing against the limiting block, maintaining the tilt angle of the oil collection groove. By setting a stop and a stop groove, the user is reminded to pause pulling the oil collection groove for oil drainage. When the oil collection groove is pulled forward again, the helical rack disengages from the helical gear, the coil spring resets and drives the rotating shaft to rotate and reset, so that the oil collection groove is reset to a horizontal state and continues to move forward until it is disassembled. It has the effect of simple and convenient disassembly process.

[0018] 3. In this invention, an auxiliary shaft is provided to support the oil outlet end of the oil collection tank, improving stability and preventing accidental contact with the oil collection tank when it is not installed, thus preventing it from tilting. An insert plate is provided to be inserted into the socket for installation of the oil collection tank. When inserting the insert plate, the rotating seat is first pushed to rotate. When the insert plate is in the socket, the elastic force of the second torsion spring causes the contact surface to press against the rear side of the insert plate, maintaining the stability of the oil collection tank. At the same time, the rotation of the rotating seat drives the auxiliary shaft to rotate and be stored in the through-hole to release the support of the connecting sleeve. This facilitates the tilting of the oil collection tank during disassembly and has the effect of preventing accidental contact. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the smoke collection hood of the present invention; Figure 3 This is a side sectional view of the smoke collection hood of the present invention; Figure 4 This is a three-dimensional structural diagram of the back plate and oil collection tank of the present invention; Figure 5 This is one of the cross-sectional structural schematic diagrams of the back plate of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A; Figure 7 This is a cross-sectional view of the limiting sleeve of the present invention; Figure 8 This is a cross-sectional view of the rotating shaft of the present invention. Figure 9 This is a front view structural diagram of the back panel of the present invention; Figure 10 This is a second cross-sectional structural schematic diagram of the back plate of the present invention; Figure 11 For the present invention Figure 10 Enlarged structural diagram at point B; Figure 12 This is a three-dimensional structural diagram of the oil collection tank of the present invention; Figure 13 This is the third schematic diagram of the cross-sectional structure of the back plate of the present invention (in the state of inserting the plate). Figure 14 This is a schematic diagram of the cross-sectional structure of the smoke collection hood and purifier of the present invention; Figure 15 This is a three-dimensional structural diagram of the interior of the outer shell of the present invention.

[0020] The attached figures are labeled as follows: 1. Smoke hood; 101. Oil drain port; 102. Inlet port; 2. Purifier; 201. Housing; 202. Mounting bracket; 203. Coarse pre-filter; 204. Electrostatic filter; 205. High-efficiency filter; 206. Activated carbon filter; 207. Fan; 208. BPCO plasma generator; 209. Air outlet; 210. Panel; 3. Back plate; 301. Through port; 302. Column; 303. Rotating seat; 3031. Connecting end; 3032. Abutment surface; 304. Auxiliary shaft; 305. Second torsion spring; 306. Insert; 4. Oil collection tank; 401. Limiting sleeve; 40 2. Stop groove; 403. Oil outlet end; 404. Fixed shaft; 405. Valve disc; 406. Counterweight; 407. First torsion spring; 408. Connecting sleeve; 5. Connecting part; 501. Rotating shaft; 502. Limiting strip; 503. Stop block; 504. Groove; 505. Stop body; 506. Spring; 6. Main drive unit; 601. Helical rack; 7. Transmission unit; 701. Helical gear; 702. One-way bearing; 8. Limiting block; 9. Housing; 10. Arc-shaped guide rail; 11. Support shaft; 12. Oil receiving groove; 1201. Insert plate; 13. HG mechanical metal cyclone separator; 14. Coil spring. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-15 The present invention is further illustrated by the embodiments: like Figures 1-15 As shown, an indoor direct-exhaust fume hood includes: a fume hood 1 for collecting cooking fumes; a purifier 2 fixedly connected to the top of the fume hood 1 for purifying the fumes so that they can be directly discharged indoors; a back plate 3, U-shaped and fixedly connected to the bottom of the fume hood 1; an oil collection tank 4 disposed inside the back plate 3 and corresponding to the oil drain 101 at the bottom of the fume hood 1 for collecting falling oil; a connecting part 5 disposed on the inner wall of the back plate 3 for detachably supporting the oil collection tank 4; a main drive unit 6 fixedly connected to the back of the oil collection tank 4; a transmission unit 7 disposed on the surface of the connecting part 5; the main drive unit 6 and the transmission unit 7 cooperate to form a tilting transmission pair; when the oil collection tank 4 is pulled forward, the tilting transmission pair drives the connecting part 5 and the oil collection tank 4 to tilt to a preset angle, and detachment can be completed by continuing to pull.

[0022] Specifically, by setting up a tilting transmission pair formed by the main drive unit 6 and the transmission unit 7, when the oil collection tank 4 is pulled forward, the oil collection tank 4 is tilted first. At this time, the oil in the oil collection tank 4 is poured out and collected. Then, by continuing to pull the oil collection tank 4, the oil collection tank 4 can be disassembled from the back for cleaning. This can prevent the user from accidentally spilling oil onto the stove when disassembling the oil collection tank 4. At the same time, the oil collection tank 4 is tilted first, which can increase the pouring speed of the oil and improve the efficiency of oil drainage.

[0023] The main drive unit 6 is a helical rack 601 fixedly connected to the back of the oil collection tank 4, and the transmission unit 7 is a helical gear 701 disposed on the surface of the connecting part 5. The helical rack 601 meshes with the helical gear 701. The helical rack 601 and the helical gear 701 refer to a rack and gear arranged in a spiral and inclined manner. In this embodiment, the path of movement of the helical rack 601 is parallel to the axis of rotation of the helical gear 701. A one-way bearing 702 is fixedly connected to the surface of the connecting part 5. The helical gear 701 is fixedly connected to the outer ring surface of the one-way bearing 702. The one-way bearing 702 allows the helical gear 701 to drive the connecting part 5 to rotate counterclockwise, while preventing the helical gear 701 from driving the connecting part 5 to rotate clockwise, thus preventing the oil collection tank 4 from tilting upwards when it is installed.

[0024] The connecting part 5 includes a rotating shaft 501 that is rotatably connected to the inner wall of the back plate 3. A protruding limiting strip 502 is fixedly connected to the surface of the rotating shaft 501. A limiting sleeve 401 is fixedly connected to the bottom of the oil collection tank 4. A limiting groove adapted to the limiting strip 502 is opened on the inner wall of the limiting sleeve 401. By setting the limiting strip 502 and the limiting groove, the rotating shaft 501 can drive the limiting sleeve 401 to rotate synchronously. A stop block 503 is fixedly connected to the surface of the rotating shaft 501. A limiting block 8 is fixedly connected to the inner wall of the back plate 3. By setting the stop block 503 and the limiting block 8, the oil collection tank 4 is limited when tilted to a preset angle.

[0025] The surface of the rotating shaft 501 is provided with a groove 504. The inner wall of the groove 504 is slidably connected to a plate-shaped stop body 505. A spring 506 is provided in the groove 504. One end of the spring 506 is fixedly connected to the stop body 505, and the other end of the spring 506 is fixedly connected to the inside of the groove 504. The inner wall of the limiting sleeve 401 is provided with a stop groove 402 that matches the stop body 505. By setting the stop body 505 and the stop groove 402 to cooperate, when the oil collection tank 4 is tilted to a preset angle, that is, when the helical rack 601 is about to disengage from the helical gear 701, the positions of the groove 504 and the stop groove 402 correspond. At this time, the spring 506 resets and drives the stop body 505 to pop out and enter the stop groove 402, increasing the resistance to pulling the oil collection tank 4 and reminding the user to stop pulling the oil collection tank 4 for oil drainage.

[0026] The back of the back plate 3 is fixedly connected to the housing 9. One end of the rotating shaft 501 passes through the back of the back plate 3 and extends into the interior of the housing 9. A coil spring 14 is fixedly connected to the surface of the rotating shaft 501. The end of the coil spring 14 away from the rotating shaft 501 is fixedly connected to the inner wall of the housing 9. When the oil in the oil collection tank 4 is discharged and the oil collection tank 4 is pulled forward, the helical rack 601 disengages from the helical gear 701. The coil spring 14 resets and drives the rotating shaft 501 to rotate and reset, so that the oil collection tank 4 is reset to a horizontal state and continues to move forward until it is disassembled. This has the effect of simple and convenient disassembly.

[0027] The inner bottom wall of the oil collecting trough 4 is arc-shaped to facilitate oil flow. One end of the oil collecting trough 4 is open to form an oil outlet 403. A fixed shaft 404 is rotatably connected to the inner wall of the oil collecting trough 4. A valve disc 405 is rotatably connected to the surface of the fixed shaft 404. A counterweight 406 is embedded inside the valve disc 405. A first torsion spring 407 is sleeved on the surface of the fixed shaft 404. One end of the first torsion spring 407 is fixedly connected to the valve disc 405, and the other end of the first torsion spring 407 is fixedly connected to the inner top wall of the oil collecting trough 4. When the oil collecting trough 4 is tilted to a preset angle, the component force generated by the weight of the counterweight 406 overcomes the friction between the first torsion spring 407, the valve disc 405, and the oil collecting trough 4, causing the valve plate to rotate and open the opening of the oil outlet 403, allowing the oil in the oil collecting trough 4 to flow out. Correspondingly, a notch is provided on the side of the back plate 3 near the oil outlet 403 to facilitate oil collection.

[0028] An arc-shaped guide rail 10 is fixedly connected to the inner wall of the back plate 3. A support shaft 11 is slidably connected inside the arc-shaped guide rail 10. The arc-shaped guide rail 10 limits the support shaft 11. A connecting sleeve 408 that matches the support shaft 11 is fixedly connected to the bottom of the oil collection tank 4. The connecting sleeve 408 is sleeved on the outside of the support shaft 11, which facilitates the disassembly and installation of the oil collection tank 4. At the same time, the stability of the oil collection tank 4 when tilting is improved with the cooperation of the arc-shaped guide rail 10. Preferably, the length of the support shaft 11 is less than the length of the connecting sleeve 408.

[0029] A through-hole 301 is provided on one side of the back plate 3 near the oil outlet end 403 of the oil collection tank 4. A column 302 is fixedly connected to the inner wall of the through-hole 301. A rotating seat 303 is rotatably connected to the surface of the column 302. An auxiliary shaft 304 is fixedly connected to the connecting end 3031 of the rotating seat 303. The auxiliary shaft 304 is used to support the oil outlet end 403 of the oil collection tank 4 to improve stability. The auxiliary shaft 304 is cylindrical and fits against the bottom of the connecting sleeve 408, which makes it convenient to insert the connecting sleeve 408 when installing the oil collection tank 4. A second torsion spring 305 is sleeved on the surface of the column 302. One end of the second torsion spring 305 is fixedly connected to the rotating seat 303, and the other end of the second torsion spring 305 is fixedly connected to the inner wall of the through-hole 301. An insertion port 306 is formed between the rotating seat 303 and the inner wall of the through-hole 301.

[0030] It also includes an oil receiving groove 12, with a plate 1201 fixedly connected to the top of the oil receiving groove 12. When the plate 1201 is inserted into the socket 306, the abutting surface 3032 of the rotating seat 303 presses against the rear side of the plate 1201. An auxiliary shaft 304 is provided to prevent accidental contact with the oil collecting groove 4 when the oil receiving groove 12 is not installed, causing it to tilt. By providing the plate 1201, it can be inserted into the socket 306 to install the oil receiving groove 12. When the plate 1201 is inserted, the rotating seat 303 is first pushed to rotate. When the plate 1201 is in the socket 306... Subsequently, due to the elastic force of the second torsion spring 305, the abutment surface 3032 presses against the rear side of the insert plate 1201, maintaining the stability of the oil receiving groove 12. At the same time, the rotation of the rotating seat 303 drives the auxiliary shaft 304 to rotate and be stored in the through port 301, releasing the support of the connecting sleeve 408. This facilitates the tilting of the oil collecting groove 4 during disassembly and has the effect of preventing accidental contact. Preferably, when the abutment surface 3032 is directly facing the inner wall of the insert 306, the distance between the two is L, the width of the insert plate 1201 is equal to L, and L is greater than the width of the insert 306.

[0031] The smoke hood 1 is internally fixedly connected to an HG mechanical metal cyclone separator 13, which effectively removes liquid and solid particles of 10µm and above. The top of the smoke hood 1 has an inlet 102 connected to the purifier 2 for the flow of oil fumes. The purifier 2 includes a housing 201 fixedly connected to the top of the smoke hood 1. A mounting bracket 202 is fixedly connected inside the housing 201. From left to right, the mounting bracket 202 houses a coarse pre-filter 203 for filtering medium-sized particles in the oil fumes, and an electrostatic filter 204 for charging oil fume particles with static electricity as they pass through a high-voltage electric field, then collecting the finer particles on a magnetic field-generating collection plate. The system includes a high-efficiency filter 205 for removing fine particles from the fumes, an activated carbon filter 206 for adsorbing residual odors, especially VOCs, to significantly reduce odors, a fan 207 fixedly connected to one side of the mounting bracket 202, and a BPCO plasma generator 208 fixedly connected to the inner wall of the housing 201 for neutralizing odors and killing bacteria and microorganisms, thereby achieving high purification quality and ensuring the safety of direct discharge. The bottom of the mounting bracket 202 is provided with an oil drain hole for oil to enter the oil collection tank 4, the top of the housing 201 is provided with an air outlet 209, and a panel 210 is detachably connected to the front of the housing 201.

[0032] Working principle: When the indoor direct exhaust hood is in use, the oil fumes enter from the fume collection hood 1 and first pass through the HG mechanical metal cyclone separator 13, which effectively removes liquid and solid particles of 10µm and above. Then, they enter the purifier 2 through the inlet 102, pass through the coarse pre-filter 203 to filter medium-sized particles in the oil fumes, and then pass through the electrostatic filter 204, which causes the oil fume particles to carry static charge when passing through the high voltage electric field. Then, the fine oil fume particles are collected on the collection plate that generates the magnetic field to remove the fine oil fume particles. Then, they pass through the high efficiency filter 205 to remove ultrafine particles in the smoke, and then pass through the activated carbon filter 206 to adsorb the remaining odors, especially VOCs, to greatly reduce the odor. Then, the BPCO plasma generator 208 neutralizes the odors and kills bacteria and microorganisms. Finally, the fumes are discharged from the outlet 209, achieving high purification quality and ensuring the safety of direct exhaust. When there is too much oil in the oil collection tank 4 and it needs to be cleaned, the user first inserts the insert plate 1201 into the socket 306. The insert plate 1201 first pushes the rotating seat 303 to rotate until it is fully inserted into the socket 306. During this process, the rotating seat 303 rotates, causing the auxiliary shaft 304 to rotate and be stored in the through port 301 to release the support of the connecting sleeve 408 so that the oil collection tank 4 can tilt. At the same time, under the elastic force of the second torsion spring 305, the abutment surface 3032 presses against the rear side of the insert plate 1201 to keep the oil collection tank 12 stable. At this time, the oil collection tank 12 is located in the preset position. Then the user pulls the oil collection groove 4 forward. The oil collection groove 4 drives the helical rack 601 to move, the helical rack 601 drives the helical gear 701 to rotate counterclockwise, the helical gear 701 drives the rotating shaft 501 to rotate, and the rotating shaft 501 drives the limiting sleeve 401 to rotate under the cooperation of the limiting strip 502 and the limiting groove, until the groove 504 corresponds to the position of the stop groove 402. The spring 506 resets and drives the stop body 505 to pop out and enter the stop groove 402, increasing the resistance to pulling the oil collection groove 4, reminding the user to pause pulling the oil collection groove 4. At this time, the limiting sleeve 4 01 drives the oil collection tank 4 to rotate to a preset angle. At the same time, the stop block 503 rotates with the rotating shaft 501 to the position of pressing against the limit block 8, maintaining the tilt angle of the oil collection tank 4. On the other hand, the partial force generated by the weight of the counterweight block 406 overcomes the friction between the first torsion spring 407 and the valve disc 405 and the oil collection tank 4, causing the valve plate to rotate and open the opening of the oil outlet 403, so that the oil in the oil collection tank 4 can flow out and fall into the preset oil receiving tank 12. During this process, the rotating shaft 501 rotates to drive the coil spring 14 to store force to prepare for reset. After the oil in the oil collection tank 4 is drained, continue to pull the oil collection tank 4 forward. The helical rack 601 disengages from the helical gear 701, and the coil spring 14 resets, driving the rotating shaft 501 to rotate and reset. This allows the oil collection tank 4 to reset to a horizontal state and continue to move forward until it is disassembled. This prevents the user from accidentally spilling oil onto the stove when disassembling the oil collection tank 4.

[0033] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of the present invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An indoor direct-exhaust fume hood, characterized in that, include: Smoke hood (1); The purifier (2) is fixedly connected to the top of the smoke collection hood (1); The back panel (3) is U-shaped and fixedly connected to the bottom of the smoke hood (1); An oil collection trough (4) is located inside the back plate (3) and corresponds to the oil drain (101) at the bottom of the smoke hood (1); The connecting part (5) is provided on the inner wall of the back plate (3) for detachably supporting the oil collection tank (4). The back of the oil collection tank (4) is fixedly connected to the main drive unit (6), and the surface of the connecting part (5) is provided with a transmission unit (7). The main drive unit (6) and the transmission unit (7) cooperate to form a tilting transmission pair. When the oil collection tank (4) is pulled forward, the tilting transmission pair drives the connecting part (5) and the oil collection tank (4) to tilt to a preset angle. Only by continuing to pull can disassembly be completed.

2. The indoor direct-exhaust fume hood as described in claim 1, characterized in that: The main drive unit (6) is a helical rack (601) fixedly connected to the back of the oil collection tank (4), and the transmission unit (7) is a helical gear (701) set on the surface of the connecting part (5). The helical rack (601) meshes with the helical gear (701). A one-way bearing (702) is fixedly connected to the surface of the connecting part (5). The helical gear (701) is fixedly connected to the outer ring surface of the one-way bearing (702).

3. The indoor direct-exhaust smoke hood as described in claim 1, characterized in that: The connecting part (5) includes a rotating shaft (501) rotatably connected to the inner wall of the back plate (3). A protruding limiting strip (502) is fixedly connected to the surface of the rotating shaft (501). A limiting sleeve (401) is fixedly connected to the bottom of the oil collection groove (4). A limiting groove adapted to the limiting strip (502) is opened on the inner wall of the limiting sleeve (401). A stop block (503) is fixedly connected to the surface of the rotating shaft (501). A limiting block (8) is fixedly connected to the inner wall of the back plate (3).

4. An indoor direct-exhaust smoke hood as described in claim 3, characterized in that: The surface of the rotating shaft (501) is provided with a groove (504), and a plate-shaped stop body (505) is slidably connected to the inner wall of the groove (504). A spring (506) is provided in the groove (504). One end of the spring (506) is fixedly connected to the stop body (505), and the other end of the spring (506) is fixedly connected to the inside of the groove (504). The inner wall of the limiting sleeve (401) is provided with a stop groove (402) that matches the stop body (505).

5. An indoor direct-exhaust smoke hood as described in claim 3, characterized in that: The back of the back plate (3) is fixedly connected to the housing (9). One end of the rotating shaft (501) passes through the back of the back plate (3) and extends into the interior of the housing (9). A coil spring (14) is fixedly connected to the surface of the rotating shaft (501). The end of the coil spring (14) away from the rotating shaft (501) is fixedly connected to the inner wall of the housing (9).

6. An indoor direct-exhaust smoke hood as described in claim 1, characterized in that: The inner bottom wall of the oil collection tank (4) is arc-shaped, and one end of the oil collection tank (4) is open to form an oil outlet (403). The inner wall of the oil collection tank (4) is rotatably connected to a fixed shaft (404). A valve disc (405) is rotatably connected to the surface of the fixed shaft (404). A counterweight (406) is embedded inside the valve disc (405). A first torsion spring (407) is sleeved on the surface of the fixed shaft (404). One end of the first torsion spring (407) is fixedly connected to the valve disc (405), and the other end of the first torsion spring (407) is fixedly connected to the inner top wall of the oil collection tank (4).

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