CN109780598B

CN109780598B - Fume exhauster

Info

Publication number: CN109780598B
Application number: CN201711107829.1A
Authority: CN
Inventors: 梁雪斐; 周佳杰; 茅忠群; 诸永定; 刘戈
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2017-11-10
Filing date: 2017-11-10
Publication date: 2024-01-16
Anticipated expiration: 2037-11-10
Also published as: CN109780598A

Abstract

The invention discloses a range hood, which comprises a fume collecting hood, a case and a fume filtering device, wherein the case is arranged above the fume collecting hood, an air inlet is formed in the fume collecting hood, an air duct is formed in the case, the fume filtering device comprises an oil screen arranged at the air inlet, and the oil screen is integrally in a conical shape with a large upper part and a small lower part and extends downwards from the air inlet, and is characterized in that: the oil smoke filter device further comprises a rotary filter screen arranged in the case and at the inlet of the air duct. Through setting up oil net and rotary filter screen, the oil net can be to the air current rectification and guide, and rotary filter screen is favorable to the air current evenly distributed at the air intake, consequently both combine can be effectively rectified and guide the air current, reduces turbulent flow and the turbulent flow in the air current, forms smooth-going air current, reduces the swirl that the air current formed before getting into fan system.

Description

Fume exhauster

Technical Field

The invention relates to kitchen appliances, in particular to a range hood.

Background

The range hood has become one of the indispensable kitchen appliances in modern families. The conventional range hood comprises a top suction type range hood and a near suction type range hood, wherein the top suction type range hood utilizes the principle of rising hot air to suck and discharge the naturally rising oil smoke generated during cooking, and has wider and wider application due to the advantages of neatness, light weight, small occupied space and the like.

The oil smoke filter device is an important component of the range hood, and technical improvement on the oil smoke filter device is always a technical hot spot in the field of the range hood. The existing range hood is provided with a filter screen for collecting oil smoke, smoke dust and the like generated in cooking, such as a range hood disclosed in China patent with the application number of 201310359754.1, and comprises an oil filter screen, an oil receiving box and a fan assembly, wherein the oil receiving box is arranged below the oil filter screen, the oil smoke firstly passes through the oil filter screen to mechanically filter oil, and the filtered large-particle grease can fall into the oil receiving box due to the action of gravity; as disclosed in the chinese patent application No. 201610642513.1, the bionic filter screen is a metal thin shell of a cone, a cuboid or a square cone with a big top and a small bottom, and is arranged at the smoke cage at the lower end of the main machine of the range hood and at the air inlet at the upper end of the oil cup.

In recent years, the multilayering of oil nets and the meandering of oil smoke air flow channels are becoming a technical trend. The oil guiding structure of the novel European style range hood disclosed in China patent with the application number of 201410013980.9 comprises an outer oil net and a net rack positioned and arranged on the inner side of the outer oil net, wherein a plurality of through first vent holes and third vent holes are respectively formed in the outer oil net and the net rack, oil guiding grooves are formed in the periphery of the plurality of first vent holes, the openings of the plurality of oil guiding grooves face the interior of the range hood, the plurality of oil guiding grooves are communicated with each other to form a path for oil drops to flow, and a plurality of flat inner oil nets are positioned and arranged between the outer oil net and the net rack; another example is a compound screen panel of lampblack absorber that chinese patent of application number is 20161013691. X discloses, including the screen panel body, the screen panel body includes lateral part and bottom, and lateral part integrated into one piece has the round interval to set up and by outside-in convex boss, and the boss is rectangular form structure and one end setting at lateral part upper end edge, and the other end setting constitutes the oil groove between two adjacent bosses of lateral part internal surface, and a plurality of meshes are densely distributed at the boss top.

The existing multi-layer oil nets have the average proportion of the ventilation hole area of each layer of oil net to the total area of the layer of oil net not exceeding 50 percent. The exhaust efficiency and the noise of the range hood can be directly influenced by the proportion of the area of the vent hole to the total area of the oil net. And the filtering and rectifying functions cannot be achieved by only using a plurality of layers of oil nets. Therefore, further improvements are still needed.

Disclosure of Invention

The invention aims to solve the technical problems of the prior art and provides a range hood capable of improving the efficiency of fume suction and reducing noise.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a range hood, includes collection petticoat pipe, sets up quick-witted case and the oil smoke filter equipment in collection petticoat pipe top, be formed with the air intake on the collection petticoat pipe, the machine incasement is formed with the wind channel, the oil smoke filter equipment is including setting up the oil net of air intake department, the oil net is big-end-up, by the toper of air intake department downwardly extending wholly, its characterized in that: the oil smoke filter device further comprises a rotary filter screen arranged in the case and at the inlet of the air duct.

For being convenient for carry out the water conservancy diversion to the oil smoke for the oil smoke gas gets into the range hood more smoothly, and furthest strengthens the range hood's oil absorption ability, and ensure sufficient air inlet area, can avoid the direct whereabouts of oil droplet again to the top of a kitchen range on, the oil net includes inlayer oil net and the outer oil net of setting in inlayer oil net periphery, inlayer oil net includes inlayer net body and sets up the first ventilation hole on inlayer net body, outer oil net includes outer net body and sets up the second ventilation hole on outer net body, first ventilation hole is less than the second ventilation hole, first ventilation hole and second ventilation hole staggered arrangement make orthographic projection partially overlap on same horizontal plane.

In order to reduce the noise of oil smoke passing through, ensure enough air inlet area and ensure better filtering effect, the first ventilation holes are diamond-shaped, the length of each first ventilation hole is 1.0-2.0 mm, the width of each first ventilation hole is 1.0-2.0 mm, and the shortest edge distance between any two adjacent first ventilation holes is 0.3-0.6 mm.

Preferably, in order to facilitate the arrangement of the rotary filter screen, the rotary filter screen comprises a net disk for filtering oil smoke and a motor for driving the net disk to rotate, an output shaft of the motor is inserted into the center of the net disk to be fixedly connected, and the motor is fixedly connected with the case through a motor bracket.

In order to improve the rigidity of the net disk and the filtering effect as much as possible, arc-shaped grooves which are symmetrical along the center and are arranged in an array are formed in the surface of the net disk, each groove extends along the radial direction of the net disk, and at least two layers of grooves are distributed along the radial direction of the net disk.

In order to enable the oil fume to pass through the rotary filter screen at the minimum flow rate, the two are in contact with each other for a long time, so that a good filtering effect is achieved, and the air duct is in a shape gradually shrinking from bottom to top.

In order to prevent grease of the case and the fan from dripping below the range hood, an oil receiving disc is arranged in the case and below the rotary filter screen.

In order to be convenient for accept the grease that drops along the quick-witted case lateral wall, fan throw away, connect the food tray to include the dish body, the shape, the size of dish body and the cross section adaptation of quick-witted case to the edge of dish body is located the below of quick-witted case, and extends the bottom edge of quick-witted case and support in the air intake edge below of collection petticoat pipe.

In order to be convenient for guide the oil smoke air current, the centre of disk body forms the opening, the disk body upwards extends certain distance in the opening part and forms the water conservancy diversion portion, water conservancy diversion portion is relative with rotatory filter screen, rotatory filter screen's edge exceeds water conservancy diversion portion.

For realizing direct suction and direct discharge, the negative pressure area is concentrated, so that the pipeline resistance is reduced, the smoke discharge is smoother, a fan system is arranged in the case, the fan system is a ternary fan, and an air inlet of the fan system is arranged in the case forward and obliquely to the horizontal direction.

Compared with the prior art, the invention has the advantages that: by arranging the oil net and the rotary filter screen, the oil net can rectify and guide the air flow, and the rotary filter screen is beneficial to the air flow to be uniformly distributed at the air inlet, so that the air flow can be effectively rectified and guided by combining the oil net with the rotary filter screen, turbulence and turbulence in the air flow are reduced, smooth air flow is formed, and vortex formed before the air flow enters the fan system is reduced; by arranging the double-layer oil nets, because the ventilation holes of the two layers of oil nets are arranged in a staggered manner, oil drops dropping in the cavity can be blocked, so that the oil drops can not directly drop on the cooking bench, the air inlet area of the oil nets is ensured by limiting the arrangement mode of inner-layer meshes, the sizes of the meshes and the intervals among the meshes, and the outer-layer oil nets play a role in guiding the oil fume gas, so that the oil fume gas can more smoothly enter the range hood; the rotary filter screen is arranged at the air duct inlet in the case, so that the oil smoke passes through the rotary filter screen at a lower flow rate, the time of mutual contact between the rotary filter screen and the oil smoke is longer, and the oil smoke and the rotary filter screen can be fully collided, so that a better filtering effect is achieved.

Drawings

Fig. 1 is a schematic view of a range hood according to an embodiment of the present invention;

fig. 2 is a sectional view of a range hood according to an embodiment of the present invention;

fig. 3 is a schematic view of a front cover of a hidden chassis of the range hood according to an embodiment of the present invention;

fig. 4 is a schematic view of an oil screen of a range hood according to an embodiment of the present invention;

FIG. 5 is an exploded view of the oil screen of FIG. 4;

fig. 6 is a schematic view of a rotary screen of a range hood according to an embodiment of the present invention;

fig. 7 is a schematic view of an oil pan of a range hood according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

Referring to fig. 1 to 3, the range hood comprises a fume collecting hood 1 and a case 2 arranged above the fume collecting hood 1, wherein a fan system 4 is arranged in the case 2. The fume collecting hood 1 is provided with an air inlet 11, so that the fan system 4 in the case 2 can suck fume, enter the case 2 through the air inlet 11 and then are discharged to a public flue.

An air duct 25 is formed in the case, and the air duct 25 is preferably gradually reduced from bottom to top.

In this embodiment, the fan system 4 is a three-way fan, and the three-way fan may be a three-way fan according to the prior art, as disclosed in chinese patent No. 201310418009. The fan system 4 can be a single ternary fan, two ternary fans connected in parallel or two ternary fans connected in series, and the ternary fans have the characteristics of compact structure, relatively small size, high fan efficiency and high wind pressure, so that the negative pressure gradient can be generated, and the smoking efficiency can be greatly improved.

In this embodiment, the air inlet 41 of the three-way fan 4 is oriented forward and is disposed in the cabinet 2 obliquely to the horizontal direction. The ternary fan 4 is obliquely arranged in this way, so that direct suction and direct discharge are realized, the negative pressure area is concentrated, the pipeline resistance is reduced, and smoke discharge is smoother. An air outlet cover 5 connected with an air outlet of the fan system 4 is arranged above the case 2, so that the oil smoke can be discharged into a public flue through the air outlet cover 5.

The range hood further comprises a fume filtering device, in this embodiment two filters are used, comprising an upstream oil screen 8 and a downstream rotary screen 6. The rotary filter screen 6 is arranged in the case 2 and below the fan system 4 and at the bottom of the case 2. That is, the rotary filter 6 is disposed at the inlet of the air duct 25, and the air duct 25 gradually decreases from bottom to top, so that the oil smoke passing through the rotary filter 6 is not accelerated by the air duct 25, and at this time, the oil smoke passes through the rotary filter 6 at the minimum flow rate, and the time of contact between the two is long, so that the oil smoke and the rotary filter 6 can collide fully, thereby achieving a better filtering effect.

The rotary filter screen 6 needs to keep a certain distance from the fan system 4 to ensure that the oil smoke passes through the rotary filter screen 6 at a low flow rate so as to be filtered fully, and after the vortex of the oil smoke is broken by the rotary filter screen 6, the oil smoke reaches the fan system 4 through a flow path with a certain distance so as to ensure that the oil smoke is enough to be smooth; the distance between the two cannot be too far, otherwise the rotary screen 6 will exceed the maximum limit of the negative pressure zone of the fan system 4. The structure of the rotary screen 6 will be described in detail below.

The oil net 8 is arranged at the air inlet 11, and an oil cup 9 is arranged at the bottom of the oil net 8. The oil screen 8 is in a cone shape with a large upper part and a small lower part, and extends downwards from the air inlet 11. Referring to fig. 2, 4 and 5, the oil screen 8 includes an inner oil screen 81 and an outer oil screen 82 provided at the outer periphery of the inner oil screen 81, and both the inner oil screen 81 and the outer oil screen 82 have a tapered shape with large upper portions and small lower portions.

The inner layer oil net 81 comprises an inner layer net body 811 and a first vent hole 812 formed in the inner layer net body 811, in this embodiment, the first vent hole 812 is diamond-shaped, noise generated when oil smoke passes through the inner layer oil net 81 is reduced, and grease molecules with uneven sizes are guided into grease molecules with even sizes, so that the rotary filter screen 6 at the rear end can remove oil better. The thickness of the inner net body 81 is preferably 0.3 to 1mm, the length of the first ventilation holes 812 is 1.0 to 2.0mm, the width (the length of the shorter one of the diagonal lines) is 1.0 to 2.0mm, and the shortest edge distance between any two adjacent first ventilation holes 812 is 0.3 to 0.6mm, thereby not only ensuring the air inlet area of the inner net 81, but also ensuring a better filtering effect.

The outer oil screen 82 includes an outer screen body 821 and a second ventilation hole 822 formed in the outer screen body 821. The outer layer net body 821 is provided with four side walls which are all obliquely arranged, so that the oil smoke can be guided in four directions, the oil smoke gas can enter the range hood more smoothly, and the oil smoke absorbing capacity of the range hood is enhanced to the greatest extent. The second ventilation holes 822 are rectangular or elliptical extending vertically, and have a width of 6mm to 10mm, and the shortest side distance between any two adjacent second ventilation holes 822 is 2mm to 5mm.

The first ventilation holes 811 and the second ventilation holes 821 are staggered, that is, orthographic projections of the first ventilation holes 811 and the second ventilation holes 821 on the same horizontal plane are partially overlapped to form an overlapped part, the sizes of the two ventilation holes are different, the staggered part increases the oil smoke collecting area, and the overlapped part can block oil drops dropping in the range hood, so that the oil drops cannot directly drop on the cooking bench.

The oil smoke sucked into the negative pressure area is contacted with the oil net 8 before entering the air inlet channel, so that large-particle grease is attached to the inner oil net 81, and the large-particle grease is prevented from entering the range hood. The oil net 8 forms multiple oil particle separation such as condensation, rectification, impact and the like by overlapping and staggered two layers of oil nets under high-speed air flow, so that the oil smoke is absorbed more cleanly.

The rotary screen 6 includes a screen tray 61 for filtering oil smoke and a motor 62 for driving the screen tray 61 to rotate. Referring to fig. 2 and 6, arc-shaped grooves 611 are formed on the surface of the net disk 61, the grooves 611 are through grooves penetrating the net disk 61, at least two layers of groove 611 arrays can be radially formed on the surface of the net disk 61, and as the concentration distribution of the fume on the circumference is influenced by the rotating speed of the fan, the types of the impellers and the inlet and outlet angle parameters before the fume enters the fan impeller, the rigidity of the net disk 61 is improved after layered design, and on the other hand, each layer of grooves 611 can be more freely distributed to the optimal width size according to the actual fume concentration distribution characteristic after a specific fan system is selected, and the filtering effect is improved as much as possible.

The array of grooves 611 are arranged in a centrally symmetrical circular ring shape, and each groove 611 extends radially, preferably with a uniform curvature and curvature. By providing radially extending grooves 611 having a certain curvature, the grease can smoothly flow from inside to outside when it contacts the mesh plate 61, and a higher centrifugal force can be obtained to achieve a higher efficiency of the centrifugal separation of the grease.

The motor 62 is disposed above the net tray 61, and an output shaft 621 of the motor 62 may be inserted into the center of the net tray 61 to be fixedly connected thereto, whereby the motor 62 may drive the net tray 61 to rotate. The left and right sides of the motor 62 are respectively connected and fixed with the left and right side walls of the cabinet 2 through the motor bracket 622, thereby completing the installation of the rotary screen 6.

The bottom end of the cabinet 2 extends to the air inlet 11 of the fume collecting hood 1, and an oil receiving disc 7 is arranged in the cabinet 2 below the rotary filter screen 6, and referring to fig. 7, the oil receiving disc 7 comprises a disc body 71 and a flow guiding part 72, the shape and the size of the disc body 71 are matched with the cross section of the cabinet 2, the disc body 71 is horizontally or nearly horizontally arranged in the cabinet 2, and the edge of the disc body 71 is arranged below the cabinet 2 and beyond the bottom end edge of the cabinet 2 to be supported below the edge of the air inlet 11 of the fume collecting hood 1. Thus, the grease dropped in the casing 2 and the grease thrown out by the fan system 4 can fall onto the tray body 71. The sides of the air duct 25 of the housing 2 are inclined to facilitate the introduction of oil thrown off by the fan system 4 onto the pan body 71.

The middle of the disk body 71 forms an opening 711, the disk body 71 extends upwards at the opening 711 for a certain distance to form a diversion part 72, the diversion part 72 is opposite to the screen disk 61 of the rotary filter screen 6, the cross sections of the opening 711 and the diversion part 72 can also be round, and the edge of the screen disk 61 can exceed the diversion part 72, so that grease thrown out of the rotary filter screen 6 can fall onto the disk body 71, and meanwhile, the diversion part 72 can also play a role in diversion of the oil fume entering from the fume collecting hood 1.

Through setting up oil screen 8 and rotary filter screen 6, oil screen 8 can be to the air current rectification and guide, and rotary filter screen 6 is favorable to the air current evenly distributed at the air intake, consequently both combine can effectively rectify and guide the air current, reduces turbulent flow and the turbulent flow in the air current, forms smooth-going air current, reduces the swirl that the air current formed before getting into fan system 4.

Claims

1. The utility model provides a range hood, includes collection petticoat pipe (1), sets up quick-witted case (2) and the oil smoke filter equipment in collection petticoat pipe (1) top, be formed with air intake (11) on collection petticoat pipe (1), be formed with wind channel (25) in machine case (2), the oil smoke filter equipment is including setting up oil net (8) of air intake (11) department, oil net (8) are big-end-up, by the toper of air intake (11) department downwardly extending wholly, its characterized in that: the oil smoke filtering device also comprises a rotary filter screen (6) which is arranged in the case (2) and at the inlet of the air duct (25);

the oil net (8) comprises an inner-layer oil net (81) and an outer-layer oil net (82) arranged on the periphery of the inner-layer oil net (81), the inner-layer oil net (81) comprises an inner-layer net body (811) and first ventilation holes (812) formed in the inner-layer net body (811), the outer-layer oil net (82) comprises an outer-layer net body (821) and second ventilation holes (822) formed in the outer-layer net body (821), the first ventilation holes (812) are smaller than the second ventilation holes (822), and the first ventilation holes (812) and the second ventilation holes (822) are staggered so that orthographic projections on the same horizontal plane are partially overlapped;

the first ventilation holes (812) are diamond-shaped, the length of each first ventilation hole (812) is 1.0-2.0 mm, the width of each first ventilation hole (812) is 1.0-2.0 mm, and the shortest edge distance between any two adjacent first ventilation holes (812) is 0.3-0.6 mm;

the rotary filter screen (6) comprises a screen disc (61) for filtering oil smoke and a motor (62) for driving the screen disc (61) to rotate, an output shaft (621) of the motor (62) is inserted into the center of the screen disc (61) to be fixedly connected, and the motor (62) is fixedly connected with the chassis (2) through a motor bracket (622);

arc-shaped grooves (611) which are symmetrical along the center and are arranged in an array are formed in the surface of the net disc (61), each groove (611) extends along the radial direction of the net disc, and at least two layers of grooves (611) are distributed along the radial direction of the net disc (61);

the novel intelligent air conditioner is characterized in that a fan system (4) is arranged in the case (2), the fan system (4) is a ternary fan, and an air inlet (41) of the fan system (4) is arranged in the case (2) frontward and obliquely to the horizontal direction.

2. The range hood of claim 1, wherein: the air duct (25) is in a shape gradually shrinking from bottom to top.

3. The range hood of claim 1, wherein: an oil receiving disc (7) is arranged in the case (2) and below the rotary filter screen (6).

4. A range hood according to claim 3, wherein: the oil receiving disc (7) comprises a disc body (71), the shape and the size of the disc body (71) are matched with the cross section of the case (2), and the edge of the disc body (71) is positioned below the case (2) and extends out of the bottom edge of the case (2) to be supported below the edge of the air inlet (11) of the fume collecting hood (1).

5. The range hood of claim 4, wherein: an opening (711) is formed in the middle of the disc body (71), the disc body (71) extends upwards at the opening (711) for a certain distance to form a flow guide part (72), the flow guide part (72) is opposite to the rotary filter screen (6), and the edge of the rotary filter screen (6) exceeds the flow guide part (72).