A new air device for removing oil fume from restaurants

Abstract

The present invention is applicable to the technical field of fresh air equipment, and provides a fume removal catering fresh air equipment, including a chassis, a total heat exchanger is arranged inside the chassis, primary air filters are arranged on the left and right sides of the total heat exchanger, secondary air filters are arranged inside the old air inlet channel and the new air exhaust channel, the secondary air filter and the primary air filter are detachably installed in the chassis, the secondary air filter and the primary air filter include a filter mechanism and a lifting and adjusting mechanism for driving the filter mechanism to move up and down in the chassis: the present invention arranges a secondary air filter and a primary air filter that are detachably installed in the chassis, the secondary air filter and the primary air filter include a filter mechanism and a lifting and adjusting mechanism for driving the filter mechanism to move up and down in the chassis, when the filter is dismantled for inspection or cleaning, it is only necessary to remove the filter through the inspection port, so that the replacement and cleaning of the filter are convenient, and the use effect and service life of the fresh air equipment are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fresh air equipment, and in particular relates to a fume removal fresh air equipment for catering. Background Art

[0002] Restaurant fumes have become a major atmospheric pollutant, even surpassing industrial pollution emissions for the first time. How to reduce the harm caused by restaurant fumes and focus on reducing them at the source and monitoring them at the end has become the focus of current public opinion. Restaurant fumes have become one of the constraints in winning the battle to protect blue skies. Some experts pointed out that "in some cities, fumes account for an average of about 4.98% of PM2.5 sources, and during heavy pollution days, fumes may contribute more."

[0003] Restaurant fume exhaust, industrial waste gas and motor vehicle exhaust were once regarded as the three "tough problems" affecting urban environmental governance. While industrial air pollution control has achieved significant results in many parts of China, the control of fume pollution, one of the sources of air pollution, has become imminent. As an important part of my country's tertiary industry, the catering industry has seen a steady increase in output value and rapid urbanization, while the density of catering fume emission sources has also increased rapidly. Relevant data show that there are currently more than 4.6 million catering service outlets in my country. The continued growth of the catering industry and the successive introduction of the "Management Measures for the Prevention and Control of Environmental Pollution in the Catering Industry" in various regions across the country have provided a huge market growth space for catering fume fresh air systems.

[0004] Commercial kitchen fume purification generally uses metal filters and dynamic mesh disks to intercept grease particles. Some range hoods intercept fine particles in the fume by loading electrostatic modules, and use blowers to supply air to the kitchen. Common household range hoods increase the power of the range hood to increase the ability to discharge fume to the outside, and generally supply air to the kitchen through doors and windows. Common commercial range hoods lack energy recovery and purification of volatile organic compounds for the exhausted fume; the vast majority of household range hoods do not treat the fume, but directly discharge it into the atmosphere, causing air pollution. Summary of the invention

[0005] The present invention provides a cooking fume removal fresh air device, aiming to solve the problem that "the range hood does not process the cooking fume but directly discharges it into the atmosphere, causing air pollution".

[0006] The present invention is implemented as follows: a fume removal catering fresh air device comprises a chassis, a total heat exchanger is arranged inside the chassis, primary air filters are arranged on the left and right sides of the total heat exchanger, an old air inlet and a new air outlet are opened on the left side of the chassis, and an old air outlet and a new air inlet are opened on the right side of the chassis; a first fan and a second fan with opposite rotation directions are also rotatably installed inside the chassis; a partition is transversely installed inside the chassis between the primary air filter and the side wall of the chassis, and the partition comprises a second partition arranged on the left side and a first partition arranged on the right side, the first partition divides the right side area inside the chassis into a fresh air inlet channel and an old air exhaust channel, and the second partition divides the left side area inside the chassis into an old air inlet channel and a fresh air exhaust channel;

[0007] The old air inlet channel and the new air exhaust channel are provided with a removable secondary air filter, and the primary air filter is also removably installed in the chassis. The secondary air filter and the primary air filter both include a filter mechanism and a lifting and adjusting mechanism for driving the filter mechanism to move up and down in the chassis.

[0008] The filter screen of the filter screen mechanism in the secondary air filter is a multi-layer structure, including a first filter screen, a second filter screen and a third filter screen, wherein:

[0009] Secondary air filter in the fresh air exhaust channel: the first filter is an activated carbon filter, the second filter is a TVOC filter, and the third filter is a melt-blown non-woven fabric;

[0010] Secondary air filter in the old air inlet channel: the first filter is a fume filter, the second filter is a multi-layer heat exchange plate with a mesh structure, and the third filter is an activated carbon filter.

[0011] Preferably, the lifting and adjusting mechanism includes a shell, a U-shaped cavity is opened inside the shell, two adjusting screws are symmetrically rotatably installed on the left and right sides of the U-shaped cavity, an adjusting screw sleeve is threadedly connected to the adjusting screw, and the adjusting screw sleeve is slidingly connected to the U-shaped cavity, and a lifting frame is arranged below the shell, and the two sides of the lifting frame are fixedly connected to the two adjusting screw sleeves respectively.

[0012] Preferably, pulleys are fixedly mounted on the upper ends of the two adjusting screws, and the two pulleys are connected via a synchronous belt transmission.

[0013] Preferably, an adjusting knob is rotatably mounted on the outer side of the housing, and a rotating shaft of the adjusting knob extends into the vertical section of the U-shaped cavity and is drivingly connected to an adjusting screw through a bevel gear set.

[0014] Preferably, the lifting frame is also a U-shaped structure, the filter mechanism is installed on the lifting frame, at least one slide groove is vertically opened on the inner side of the side wall of the lifting frame, the filter mechanism includes a filter frame and a filter fixedly installed on the filter frame, and the side of the filter frame is slidably installed in the slide groove; the side wall of the lifting frame is provided with a fixing screw hole corresponding to the slide groove, and a fixing nut is connected and installed in the fixing screw hole, and the side wall of the filter frame is provided with an installation hole corresponding to the position of the fixing screw hole.

[0015] Preferably, the bottom of the chassis is provided with inspection openings below the primary air filter and the secondary air filter.

[0016] Preferably, the filter screens of the filter screen mechanism in the primary air filter also include a first filter screen, a second filter screen and a third filter screen, the first filter screen and the third filter screen are primary filter screens, and the second filter screen is a high-efficiency filter screen.

[0017] Preferably, an air inlet is provided at the bottom of the old air inlet channel, a bottom plate is fixedly installed in the air inlet, at least one through hole is provided on the bottom plate, a cover plate is also slidably installed at the bottom of the chassis at the air inlet, an oil fume hole matching the through hole is provided on the cover plate, after the cover plate slides until the through hole is aligned with the oil fume hole, the oil fume enters the old air inlet channel from the air inlet.

[0018] Preferably, an impeller is rotatably installed in the old air inlet channel, a generator is installed on the outside of the chassis, the rotating shaft of the impeller extends into the interior of the generator to drive the generator to generate electricity, and an adjusting cylinder that drives the cover plate to slide is also installed at the bottom of the chassis, and the adjusting cylinder is electrically connected to the generator.

[0019] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0020] 1. The present invention provides a secondary air filter and a primary air filter that are detachably mounted in the chassis. The secondary air filter and the primary air filter include a filter mechanism and a lifting and adjusting mechanism that drives the filter mechanism to move up and down in the chassis. When the filter is removed for inspection or cleaning, it is only necessary to remove the filter through the inspection port, which is convenient for replacement and cleaning of the filter and improves the use effect and service life of the fresh air equipment.

[0021] 2. The present invention uses a primary filter in the fresh air exhaust channel to intercept particles, eliminate odors, eliminate harmful substances and isolate bacteria in the fresh air entering the room, thereby effectively ensuring the air quality of the fresh air flowing into the room; uses a primary filter in the old air inlet channel to remove oil fumes overflowing from the range hood, and intercepts, cools, filters and removes odors from the oil fumes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a fume removal catering fresh air device provided by the present invention;

[0023] Figure 2 The present invention is a bottom view of a chassis of a fume removal catering fresh air device provided by the present invention.

[0024] Figure 3 It is a cross-sectional view of a lifting and adjusting mechanism of a fume removal catering fresh air equipment provided by the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of a lifting frame in a fume removal catering fresh air equipment provided by the present invention.

[0026] Figure 5 The present invention provides a schematic diagram of the structure of a filter mechanism in a fume removal catering fresh air device.

[0027] Figure 6 It is a structural schematic diagram of Example 2 of an oil fume removal catering fresh air equipment provided by the present invention.

[0028] Figure 7 It is a bottom view of the chassis in Example 2 of the oil fume removal catering fresh air equipment provided by the present invention.

[0029] In the figure: 1-chassis, 101-old air inlet, 102-new air outlet, 103-first fan, 104-second fan, 105-old air outlet, 106-new air inlet, 107-first baffle, 108-second baffle, 109-inspection port, 2-secondary air filter, 3-full heat exchanger, 4-primary air filter, 5-adjustment knob, 6-lifting adjustment mechanism, 601-housing, 602-adjustment screw sleeve , 603-adjusting screw, 604-U-shaped cavity, 605-synchronous belt, 606-lifting frame, 607-bevel gear set, 608-slide, 609-fixing screw hole, 610-fixing nut, 7-filter mechanism, 701-first filter, 702-second filter, 703-third filter, 704-adjusting cylinder, 8-impeller, 9-generator, 10-bottom plate, 11-air inlet, 12-cover plate. DETAILED DESCRIPTION

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] Embodiment 1:

[0033] The embodiment of the present invention provides a new air device for removing cooking fumes. Figure 1 As shown, Figure 1 is a schematic three-dimensional diagram of a fresh air machine chassis 1 according to an embodiment of the present invention. It should be noted that in order to more clearly show the internal structure of the chassis 1, Figure 1 The shell of the chassis 1 shown is partially removed. In practical applications, the shell of the chassis 1 is sealed as a whole;

[0034] like Figure 1 As shown, a total heat exchanger 3 is arranged inside the chassis 1, and primary air filters 4 are arranged on the left and right sides of the total heat exchanger 3. The size of the primary air filter 4 should be larger than the size of the air inlet and outlet of the total heat exchanger 3, and the primary air filter 4 should also be in close contact with the air inlet and outlet of the total heat exchanger 3 to ensure that the new and old air after heat exchange by the total heat exchanger 3 can all be filtered through the primary air filter 4. It should be noted that the new air in the embodiment of the present invention refers to the ambient air flowing from the outdoors into the indoors, and the old air refers to the indoor air flowing from the indoors into the outdoors; the left side of the chassis 1 is provided with an old air inlet 101 and a new air outlet 102, and the right side of the chassis 1 is provided with an old air outlet 105 and a new air inlet 106. The old air inlet 101 is provided with a new air outlet 106. 01. The fresh air outlet 102, the old air outlet 105 and the fresh air inlet 106 have the same structure and are all connected to the interior of the chassis 1, so that the air outside the chassis 1 can be introduced into or exported from the interior of the chassis 1; the first fan 103 and the second fan 104 are also rotatably installed inside the chassis 1, the first fan 103 is arranged on the same side as the fresh air outlet 102, the second fan 104 is arranged on the same side as the old air outlet 105, and the rotation direction of the first fan 103 is counterclockwise, and the rotation direction of the second fan 104 is clockwise. At this time, the first fan 103 acts as a fresh air intake fan to draw the ambient air outside the chassis 1 into the interior of the chassis 1, and the second fan 104 acts as an old air exhaust fan to draw the indoor air outside the chassis 1 into the chassis 1;

[0035] It should be noted that the old air inlet 101 and the fresh air outlet 102 are both connected to the room, and the fresh air inlet 106 and the old air outlet 105 are both connected to the outside. The specific connection relationship is generally connected by a pipeline in the prior art. It is worth noting here that the oil fume removal catering fresh air equipment disclosed in the present invention is applied to general restaurants. The indoor here refers to the restaurant room, including the dining area, the kitchen area, etc. The oil fume removal catering fresh air equipment can also be used in other places with large oil fumes;

[0036] Of course, the first fan 103 can also be changed into an old air exhaust fan, and the direction of the first fan 103 is changed to clockwise rotation. At this time, the fresh air outlet 102 is changed into the old air inlet, the fresh air inlet 106 is changed into the old air outlet, the second fan 104 is changed into the fresh air inlet fan, the old air inlet 101 is changed into the fresh air outlet, and the old air outlet 105 is changed into the fresh air inlet;

[0037] Regardless of the air inlet and outlet mode, the new and old air pass through the primary air filter 4 and then flow into the total heat exchanger 3 for energy transfer, presenting a heat and mass transfer phenomenon, causing a total heat exchange process, saving energy consumption for fresh air pretreatment, and achieving the purpose of energy-saving ventilation. As a prior art, the total heat exchanger 3, its internal structure and working principle are not described in detail here.

[0038] In one embodiment of the present invention, a partition is installed laterally inside the chassis 1 between the primary air filter 4 and the side wall of the chassis 1, and the partition includes a second partition 108 arranged on the left side and a first partition 107 arranged on the right side, the first partition 107 separates the right side area inside the chassis 1 into a fresh air inlet channel and an old air exhaust channel, and the second partition 108 separates the left side area inside the chassis 1 into an old air inlet channel and a fresh air exhaust channel. Of course, the old air inlet 101 is connected to the old air inlet channel, the fresh air outlet 102 is connected to the fresh air exhaust channel, the old air outlet 105 is connected to the old air exhaust channel, and the fresh air inlet 106 is connected to the fresh air inlet channel. It should be noted here that the right side area of ​​the chassis 1 refers to the space between the right side wall of the chassis 1 and the right primary air filter 4, and the left side area refers to the space between the left side wall of the chassis 1 and the left secondary air filter 2;

[0039] Further, in the embodiment of the present invention, secondary air filters 2 are installed inside the old air inlet channel and the new air exhaust channel. In the old air inlet channel, the secondary air filter 2 is an oil fume filter mechanism for removing the air with a large oil fume content inside the restaurant. In the new air exhaust channel, the secondary air filter 2 is a high-efficiency air filter mechanism for removing particulate matter contained in the outdoor fresh air, reducing the TVOC content, and sterilizing the fresh air to ensure that the fresh air flowing into the room is clean, hygienic and safe.

[0040] from Figure 1It can be seen that the secondary air filter 2 is close to the primary air filter 4. Of course, this is not the only installation position of the secondary air filter 2. It can be installed at any position in the old air inlet channel or the new air exhaust channel that does not affect the operation of the first fan 103, such as close to the old air inlet 101 or the new air outlet 102.

[0041] See also Figure 3 In another embodiment of the present invention, the secondary air filter 2 and the primary air filter 4 can be detachably mounted on the chassis 1, and the secondary air filter 2 and the primary air filter 4 both include a filter mechanism 7 and a lifting and adjusting mechanism 6 for driving the filter mechanism 7 to move up and down in the chassis 1, that is, the filter mechanism 7 is driven to move up and down by the lifting and adjusting mechanism 6, when the filter mechanism 7 is in use, the filter mechanism 7 is driven to rise into the chassis 1 for filtering, and when the filter mechanism 7 is inspected and cleaned, the filter mechanism 7 is driven to descend and extend out of the chassis 1;

[0042] Further, the lifting adjustment mechanism 6 includes a shell 601, a U-shaped cavity 604 is provided inside the shell 601, two adjusting screws 603 are symmetrically installed on the left and right sides of the U-shaped cavity 604, and an adjusting screw sleeve 602 is threadedly connected to the adjusting screw 603, and the adjusting screw sleeve 602 is slidably connected to the U-shaped cavity 604. A lifting frame 606 is provided below the shell 601, and the two sides of the lifting frame 606 are respectively fixedly connected to the two adjusting screw sleeves 602. When the adjusting screw 603 rotates, the lifting frame 606 is driven by the adjusting screw sleeve 602. 6 lifting movement, specifically, when the adjusting screw 603 rotates clockwise, the adjusting screw sleeve 602 slides downward along the vertical section of the U-shaped cavity 604, thereby driving the lifting frame 606 to slide downward; when the adjusting screw 603 rotates counterclockwise, the adjusting screw sleeve 602 slides upward along the vertical section of the U-shaped cavity 604, thereby driving the lifting frame 606 to slide upward; of course, the rotation direction of the thread on the adjusting screw 603 can also be changed, so that when the adjusting screw 603 rotates clockwise, the lifting frame 606 slides upward, and when the adjusting screw 603 rotates counterclockwise, the lifting frame 606 slides downward;

[0043] Furthermore, in the embodiment of the present invention, pulleys are fixedly mounted on the upper ends of the two adjusting screws 603, and the two pulleys are connected by a synchronous belt 605 to maintain synchronization when the two adjusting screws 603 rotate.

[0044] An adjusting knob 5 is rotatably mounted on the outer side of the housing 601 . The rotating shaft of the adjusting knob 5 extends into the vertical section of the U-shaped cavity 604 and is transmission-connected to an adjusting screw 603 via a bevel gear set 607 , so as to drive the adjusting screw 603 to rotate.

[0045] See also Figure 4In another embodiment of the present invention, the lifting frame 606 is also a U-shaped structure, the filter mechanism 7 is installed on the lifting frame 606, and at least one slide groove 608 is vertically opened on the inner side of the side wall of the lifting frame 606. The filter mechanism 7 includes a filter frame and a filter assembly fixedly installed on the filter frame. The side of the filter frame is slidably installed in the slide groove 608 and can slide up and down along the slide groove 608;

[0046] In order to fix the filter frame, a fixing screw hole 609 corresponding to the slide groove 608 is opened on the side wall of the lifting frame 606, and a fixing nut 610 is connected and installed in the fixing screw hole 609. The side wall of the filter frame is opened with an installation hole corresponding to the position of the fixing screw hole 609. The fixing nut 610 passes through the fixing screw hole 609 and the installation hole in turn and is tightened to fix the filter frame on the lifting frame 606 and move synchronously up and down along the lifting frame 606. When the filter frame and the filter need to be removed, the fixing nut 610 can be unscrewed.

[0047] See also Figure 2 ,like Figure 2 As shown, the bottom of the chassis 1 is provided with an inspection port 109 below the primary air filter 4 and the secondary air filter 2. When the filter is dismantled for inspection or cleaning, the filter only needs to be removed through the inspection port 109.

[0048] See also Figure 5 The filter components of the filter mechanism 7 in the secondary air filter 2 and the primary air filter 4 are both multi-layer structures. In the embodiment of the present invention, they are both three-layer structures, namely, a first filter 701, a second filter 702 and a third filter 703, wherein:

[0049] In the primary air filter 4, the first filter 701 and the third filter 703 are primary filter screens for intercepting large particles, and the second filter 702 is a high-efficiency filter screen for effectively filtering PM2.5, dust and other harmful substances;

[0050] Since one secondary air filter 2 is provided in each of the old air inlet channel and the new air exhaust channel, although both are three-layer filter structures, the structure of each layer of filter is not exactly the same, wherein:

[0051] Secondary air filter 2 in the fresh air exhaust channel: the first filter 701 is an activated carbon filter, the second filter 702 is a TVOC filter, and the third filter 703 is a melt-blown non-woven fabric, which intercepts particles, eliminates odors, eliminates harmful substances and isolates bacteria from the fresh air entering the room, effectively ensuring the air quality of the fresh air flowing into the room;

[0052] Secondary air filter 2 in the old air inlet channel: the first filter 701 is an oil fume filter, the second filter 702 is a multi-layer heat exchange plate with a mesh structure, and the third filter 703 is an activated carbon filter. In a restaurant environment, especially in a restaurant kitchen, oil fume is easily generated indoors. When the amount of oil fume is large, it is difficult for the range hood to remove it in time. The oil fume filter, the multi-layer heat exchange plate and the activated carbon filter can remove the oil fume overflowing from the range hood, and the oil fume can be intercepted, cooled, filtered and deodorized.

[0053] Embodiment 2:

[0054] See also Figure 6-7 The difference between this embodiment and embodiment 1 is that:

[0055] An air inlet 11 is provided at the bottom of the old air inlet passage, a bottom plate 10 is fixedly installed in the air inlet 11, and at least one through hole is provided on the bottom plate 10. A cover plate 12 is also slidably installed at the bottom of the chassis 1 at the air inlet 11, and an oil fume hole matching the through hole is provided on the cover plate 12. When the cover plate 12 is buckled with the air inlet 11, the through hole and the oil fume hole are staggered, and the oil fume cannot enter the air inlet 11. After the cover plate 12 slides until the through hole is aligned with the oil fume hole, the oil fume enters the old air inlet passage from the air inlet 11, thereby increasing the amount of oil fume entering and quickly removing the indoor oil fume.

[0056] Furthermore, an impeller 8 is rotatably installed in the old air inlet channel. After the old air (oil smoke) enters the old air inlet channel, it drives the impeller 8 to rotate. A generator 9 is installed on the outside of the chassis 1. The rotating shaft of the impeller 8 extends into the interior of the generator 9 to drive the generator 9 to generate electricity. An adjusting cylinder 704 that drives the cover plate 12 to slide is also installed at the bottom of the chassis 1. The adjusting cylinder 704 is electrically connected to the generator 9. After the old air (oil smoke) enters the old air inlet channel, it drives the impeller 8 to rotate. The impeller 8 drives the generator 9 to generate electricity. After being energized, the adjusting cylinder 704 extends, driving the cover plate 12 to slide until the through hole is aligned with the oil smoke hole, thereby increasing the amount of oil smoke intake.

[0057] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0058] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0059] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A fume removal catering fresh air device, comprising a chassis (1), wherein a total heat exchanger (3) is arranged inside the chassis (1), primary air filters (4) are arranged on both the left and right sides of the total heat exchanger (3), and a partition is installed laterally inside the chassis (1) between the primary air filter (4) and the side wall of the chassis (1), wherein the partition comprises a second partition (108) arranged on the left side and a first partition (107) arranged on the right side, wherein the first partition (107) separates the right side area inside the chassis (1) into a fresh air inlet channel and an old air exhaust channel, and the second partition (108) separates the left side area inside the chassis (1) into an old air inlet channel and a fresh air exhaust channel, wherein: A secondary air filter (2) is provided inside the old air inlet channel and the fresh air exhaust channel. The secondary air filter (2) and the primary air filter (4) are detachably mounted in the chassis (1). The secondary air filter (2) and the primary air filter (4) include a filter mechanism (7) and a lifting and adjusting mechanism (6) for driving the filter mechanism (7) to move up and down in the chassis (1); A first fan (103) and a second fan (104) are also rotatably mounted inside the chassis (1); an old air inlet (101) and a new air outlet (102) are provided on the left side of the chassis (1); an old air outlet (105) and a new air inlet (106) are provided on the right side of the chassis (1); the first fan (103) serves as a new air intake fan or an old air exhaust fan; the second fan (104) serves as an old air exhaust fan or a new air intake fan; the new air intake fan is used to draw ambient air outside the chassis (1) into the chassis (1); the old air exhaust fan is used to draw indoor air outside the chassis (1) into the chassis (1); wherein: When the first fan (103) serves as a fresh air intake fan, the second fan (104) serves as an old air exhaust fan; When the first fan (103) serves as an old air exhaust fan, the second fan (104) serves as a new air intake fan. At this time, the new air outlet (102) is changed to an old air inlet, the new air inlet (106) is changed to an old air outlet, the second fan (104) is changed to a new air intake fan, the old air inlet (101) is changed to a new air outlet, and the old air outlet (105) is changed to a new air inlet; The filter assembly of the filter mechanism (7) in the secondary air filter (2) and the primary air filter (4) is a multi-layer structure, including a first filter (701), a second filter (702) and a third filter (703); the secondary air filter (2) in the fresh air exhaust channel: the first filter (701) is an activated carbon filter, the second filter (702) is a TVOC filter, and the third filter (703) is a melt-blown non-woven fabric; the secondary air filter (2) in the old air inlet channel: the first filter (701) is a fume filter, the second filter (702) is a multi-layer heat exchange plate with a mesh structure, and the third filter (703) is an activated carbon filter; An air inlet is provided at the bottom of the old air inlet passage, a bottom plate (10) is fixedly installed in the air inlet, at least one through hole is provided on the bottom plate (10), a cover plate (12) is slidably installed at the bottom of the chassis (1) at the air inlet, an oil fume hole matching the through hole is provided on the cover plate (12), and after the cover plate (12) slides until the through hole is aligned with the oil fume hole, the oil fume is allowed to enter the old air inlet passage from the air inlet; An impeller (8) is also rotatably installed in the old air inlet channel. A generator (9) is installed on the outer side of the chassis (1). The rotating shaft of the impeller (8) extends into the interior of the generator (9) to drive the generator (9) to generate electricity. An adjusting cylinder (704) is also installed at the bottom of the chassis (1) to drive the cover plate (12) to slide. The adjusting cylinder (704) is electrically connected to the generator (9). After the old air enters the old air inlet channel, it drives the impeller (8) to rotate. The impeller (8) drives the generator (9) to generate electricity. After being energized, the adjusting cylinder (704) extends, driving the cover plate (12) to slide until the through hole is aligned with the oil fume hole, thereby increasing the amount of oil fume intake.

2. The cooking fume removal fresh air equipment according to claim 1, characterized in that: The lifting and adjusting mechanism (6) comprises a shell (601), a U-shaped cavity (604) is provided inside the shell (601), two adjusting screws (603) are symmetrically rotatably installed on the left and right sides of the U-shaped cavity (604), an adjusting screw sleeve (602) is threadedly connected to the adjusting screw sleeve (602), and the adjusting screw sleeve (602) is slidably connected to the U-shaped cavity (604), and a lifting frame (606) is provided below the shell (601), and the two sides of the lifting frame (606) are respectively fixedly connected to the two adjusting screw sleeves (602).

3. The oil fume removal catering fresh air equipment according to claim 2, characterized in that: The upper ends of the two adjusting screw rods (603) are fixedly mounted with pulleys, and the two pulleys are connected by a synchronous belt (605).

4. The cooking fume removal fresh air equipment according to claim 3, characterized in that: An adjusting knob (5) is rotatably mounted on the outer side of the housing (601), and the rotating shaft of the adjusting knob (5) extends into the vertical section of the U-shaped cavity (604) and is transmission-connected to an adjusting screw (603) via a bevel gear set (607).

5. The cooking fume removal fresh air equipment according to claim 4, characterized in that: The lifting frame (606) is also a U-shaped structure. The filter mechanism (7) is mounted on the lifting frame (606). At least one slide groove (608) is vertically opened on the inner side of the side wall of the lifting frame (606). The filter mechanism (7) comprises a filter frame and a filter fixedly mounted on the filter frame. The side of the filter frame is slidably mounted in the slide groove (608). The side wall of the lifting frame (606) is opened with a fixing screw hole (609) corresponding to the slide groove (608). A fixing nut (610) is connected and installed in the fixing screw hole (609). The side wall of the filter frame is opened with a mounting hole corresponding to the position of the fixing screw hole (609).

6. The cooking fume removal fresh air equipment according to claim 5, characterized in that: The bottom of the chassis (1) is provided with inspection openings (109) below the primary air filter (4) and the secondary air filter (2).

7. The oil fume removal catering fresh air equipment according to claim 1, characterized in that: In the primary air filter (4), the first filter screen (701) and the third filter screen (703) are primary filter screens, and the second filter screen (702) is a high-efficiency filter screen.

Images