CN111437653A

CN111437653A - Filter screen manufacturing method, filter screen and range hood

Info

Publication number: CN111437653A
Application number: CN202010390500.6A
Authority: CN
Inventors: 任富佳; 张玉; 吕立丰; 吕春明; 余国成
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2020-07-24

Abstract

The invention provides a filter screen manufacturing method, a filter screen and a range hood, and relates to the technical field of kitchen appliances, wherein the filter screen manufacturing method comprises the following steps: bending the first substrate with meshes, and fixedly connecting the head end and the tail end of the first substrate to form a surrounding plate; manufacturing a top plate; and fixedly connecting the enclosing plate and the top plate to form the filter screen. In the filter screen manufacturing method, the end parts of the first substrate only need to be fixedly connected in the manufacturing process of the enclosing plates, and the connecting positions are few, so that the problem that in the prior art, the manufacturing cost is high due to the fact that the enclosing plates are folded towards the same side of the top plate and then two adjacent enclosing plates are welded can be solved.

Description

Filter screen manufacturing method, filter screen and range hood

Technical Field

The invention relates to the technical field of kitchen appliances, in particular to a filter screen manufacturing method, a filter screen and a range hood.

Background

In the prior art, the filter screen of the range hood is generally manufactured by adopting an integral stretch forming method, but although the filter screen produced by the integral stretch forming method has strong part unity and is not spliced, the method cannot form a right angle or a negative angle, namely, the angle between the coaming 100 'and the top plate 200' is required to be larger than 90 degrees. For this reason, the filter screen in the prior art is manufactured by a method of four-side bending, as shown in fig. 1, folding four enclosing plates 100 ' to the same side of a top plate 200 ' and then welding two adjacent enclosing plates 100 ', which can form a right angle or a negative angle, but the manufacturing cost is relatively high.

Disclosure of Invention

The first purpose of the present invention is to provide a method for manufacturing a filter screen, so as to alleviate the technical problem of the prior art that the manufacturing cost of the filter screen is relatively high.

The invention provides a method for manufacturing a filter screen, which comprises the following steps:

bending the first substrate with meshes, and fixedly connecting the head end and the tail end of the first substrate to form a surrounding plate;

manufacturing a top plate;

fixedly connecting the coaming with the top plate to form the filter screen.

Further, the step of manufacturing the shroud includes:

before the first substrate is bent, a plurality of riveting sheets and a plurality of grooves are respectively formed at the head end and the tail end of the first substrate, and the riveting sheets correspond to the grooves one to one; after the first substrate is bent, riveting the riveting sheets and the grooves in a one-to-one correspondence manner;

or after the first substrate is bent, welding the head end and the tail end of the first substrate.

Further, the step of manufacturing the coaming further comprises: and after riveting or welding the head end and the tail end of the first substrate, reinforcing the head end and the tail end of the first substrate by using fasteners.

Further, the step of manufacturing the shroud includes: and forming a first flange edge at one end of the first substrate, which is used for being connected with the top plate, before bending the first substrate and after forming the rivet sheet and the groove.

Further, the step of manufacturing the coaming further comprises: before the first flange edge is formed, forming a plurality of notches at one end of the first substrate, which is far away from the first flange edge, wherein the notches are all positioned at different corners of the coaming after the coaming is manufactured; one end of the first base plate, which is far away from the first flange edge, is provided with a second flange edge, and the notch is located on the second flange edge, and the second flange edge is used for being connected with the smoke collecting cover.

Further, the step of fabricating the top plate includes: blanking to obtain a second substrate; and forming a flange at the periphery of the second base plate, wherein the flange is used for pressing and fixing the first flange edge to the first main body.

Further, the step of fixedly connecting the shroud and the top plate includes:

placing the first flange edge in the turned-over edge;

forming an acute angle between the flange and the main body part of the second substrate;

then, the angle between the flange and the main body portion of the second base plate is made 0 DEG and both are pressed.

Further, a plurality of protrusions are formed on a side of the flange adjacent to the first flange edge when the flange is pressed against the main body portion of the second base plate.

The filter screen manufacturing method provided by the invention can produce the following beneficial effects:

the filter screen manufacturing method provided by the invention comprises the steps of manufacturing the enclosing plate and the top plate respectively, and then fixedly connecting the enclosing plate and the top plate to form the filter screen, wherein the enclosing plate only needs to be fixedly connected with the head end and the tail end of the first substrate, and the connecting positions are few, so that the problem of high manufacturing cost caused by the fact that the enclosing plates are folded towards the same side of the top plate and then two adjacent enclosing plates are welded in the prior art can be solved.

A second object of the present invention is to provide a filter screen, so as to alleviate the technical problem of the prior art that the manufacturing cost of the filter screen is relatively high.

The filter screen provided by the invention comprises enclosing plates and a top plate, wherein the two ends of the enclosing plates along the circumferential direction are fixedly connected, and the top plate is fixedly connected with the enclosing plates.

Furthermore, a plurality of riveting sheets and a plurality of grooves are respectively arranged at two ends of the enclosing plate along the circumferential direction of the enclosing plate, and the riveting sheets and the grooves are riveted in a one-to-one correspondence manner;

or the two ends of the coaming along the circumferential direction are welded.

Further, the rivet sheet is in interference riveting with the groove.

Further, the two ends of the enclosing plate along the circumferential direction are fastened through fasteners.

Further, the enclosing plate comprises a first main body, and a first flange edge is arranged at one end, connected with the top plate, of the first main body; the top plate comprises a second main body and a flange arranged on the periphery of the second main body, and the first flange edge is clamped between the second main body and the flange.

Further, one end of the enclosing plate, which is far away from the first flange edge, is provided with a second flange edge, and the second flange edge is used for being connected with the smoke collecting cover.

Further, the second flange edge is provided with a plurality of gaps, and the gaps are located at different corners of the enclosing plate.

Furthermore, a plurality of protrusions are arranged on one side, close to the first flange edge, of the flanging.

The filter screen provided by the invention can produce the following beneficial effects:

the filter screen provided by the invention comprises the enclosing plates and the top plate, wherein the two ends of the enclosing plates along the circumferential direction are fixedly connected, and the connecting positions are few, so that the problem of high manufacturing cost caused by folding the enclosing plates to the same side of the top plate and then welding the two adjacent enclosing plates in the prior art can be solved.

The third objective of the present invention is to provide a range hood to alleviate the technical problem of high manufacturing cost of the filter screen in the prior art.

The range hood provided by the invention comprises the filter screen.

The range hood provided by the invention comprises all the beneficial effects of the filter screen, so that the description is omitted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of an expanded structure of a filter screen provided in the background art;

fig. 2 is a schematic step diagram of a first enclosure plate manufacturing method in the filter screen manufacturing method according to the embodiment of the present invention;

fig. 3 is a schematic step diagram of a second enclosure manufacturing method in the filter screen manufacturing method according to the embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a top plate manufacturing method in a filter screen manufacturing method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a method of fabricating a filter screen according to an embodiment of the present invention;

fig. 6 is a second schematic view illustrating a manufacturing method of a filter screen according to an embodiment of the present invention;

FIG. 7 is a sectional view of a portion of the structure of FIG. 6 taken along the X-direction of the turn-up edge;

FIG. 8 is a partially expanded view of a first shroud of the filter screen according to an embodiment of the present invention;

FIG. 9 is a schematic view of a first embodiment of a filter screen according to the present invention;

FIG. 10 is a partially expanded view of a second type of shroud of the filter screen provided in accordance with an embodiment of the present invention;

FIG. 11 is a schematic view of a second embodiment of a filter screen according to the present invention;

fig. 12 is a schematic view of a partial structure of a filter screen according to an embodiment of the present invention.

Icon:

100' -coaming; 200' -the top plate;

100-enclosing plates; 110-a first body; 120-riveting sheets; 130-a groove; 140-a first flanged edge; 150-a second flange edge; 151-notch; 160-a fastener; 170-welding seams;

200-a top plate; 210-a second body; 220-flanging; 221-projection.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Example one

The embodiment provides a method for manufacturing a filter screen, which comprises the following steps: bending the first substrate with meshes, and fixedly connecting the head end and the tail end of the first substrate to form a surrounding plate 100; manufacturing a top plate 200; the shroud 100 and top plate 200 are fixedly attached to form a screen.

The filter screen manufacturing method provided by the embodiment comprises the steps of manufacturing the enclosing plate 100 and the top plate 200 respectively, and then fixedly connecting the enclosing plate 100 and the top plate 200 to form the filter screen, wherein the enclosing plate 100 only needs to be fixedly connected with the head end and the tail end of the first substrate, and the connecting positions are few, so that the problem that in the prior art, the enclosing plates are folded towards the same side of the top plate, and then two adjacent enclosing plates are welded to cause higher manufacturing cost can be solved.

Specifically, in this embodiment, the first substrate is in a long strip shape, and the head end and the tail end of the first substrate refer to two ends of the first substrate in the length direction.

Fig. 2 is a schematic step view of a method for manufacturing a coaming in a method for manufacturing a filter screen according to this embodiment.

As shown in fig. 2, in this embodiment, the step of manufacturing the shroud 100 includes: before the first substrate is bent, a plurality of riveting sheets 120 and a plurality of grooves 130 are respectively arranged at the head end and the tail end of the first substrate, and the riveting sheets 120 correspond to the grooves 130 one by one; after the first substrate is bent, the plurality of rivet pieces 120 are riveted in one-to-one correspondence to the plurality of grooves 130. That is, in this embodiment, through the mode with the riveting of the head and the tail both ends of first base plate, need not the welding, there is not the welding seam to greatly reduced the cost of manufacture of bounding wall 100 and filter screen.

Specifically, in this embodiment, the head of the rivet piece 120 is large, the bottom is small, the bottom of the groove 130 is large, the neck is small, and the rivet piece 120 is in interference riveting with the groove 130, so that the rivet piece 120 and the groove 130 are not easy to loosen, and the firmness of connection between the rivet piece and the groove is enhanced.

Specifically, in this embodiment, a plurality of riveting pieces 120 are arranged at intervals on the end of the first substrate, a plurality of grooves 130 are arranged at intervals on the end of the first substrate, and the riveting pieces 120 arranged at intervals and the grooves 130 arranged at intervals can further enhance the connection of the two ends of the first substrate after being in interference fit, so that the connection of the two ends of the first substrate is firmer.

Specifically, in this embodiment, the punching area of the first substrate is regular, and a high-speed progressive punching method is adopted during punching, so that the efficiency is high, and the cost of the die can be reduced. In this embodiment, the shape of the holes is a diamond shape, however, in other embodiments of the present application, the shape of the holes may also be a circle, a hexagon, a square, or the like, which is not particularly limited in the present application.

In this embodiment, the step of manufacturing the shroud 100 further includes: after riveting the head and tail ends of the first substrate, the head and tail ends of the first substrate are reinforced with fasteners 160. The arrangement enhances the connection firmness of the head end and the tail end of the first substrate and the structural stability of the coaming 100.

Specifically, in this embodiment, a part of the through hole is formed at the head end and the tail end of the first substrate, and the two part of the through hole forms a complete through hole after the head end and the tail end of the first substrate are riveted, and the fastener 160 reinforces the connection of the head end and the tail end of the first substrate by clamping the head end and the tail end of the first substrate at the same time.

More specifically, in this embodiment, the fastener 160 is a blind rivet nut. However, in other embodiments of the present application, the fastener 160 is not limited to a blind rivet nut as long as the connection of the first substrate at the end and the end can be reinforced.

In this embodiment, the rivet nut can also be fixed in the collection petticoat pipe with the filter screen installation simultaneously when consolidating first base plate head and the tail both ends. That is, during the installation filter screen, can make the rivet nut pass the perforation on the mounting hole on the collection petticoat pipe and the filter screen, so set up, the rivet nut can enough be fixed in the collection petticoat pipe with the filter screen, has also effectively avoided the separation at bounding wall 100 head and the tail both ends simultaneously, plays the reinforcing action.

In this embodiment, the step of manufacturing the shroud 100 includes: before the first base plate is bent and after the rivet piece 120 and the groove 130 are formed, a first flange 140 is formed at one end of the first base plate for connection with the top plate 200, and the first flange 140 is used for connection with the top plate 200.

In this embodiment, the step of manufacturing the shroud 100 further includes: before the first flange edge 140 is formed, forming a plurality of notches 151 at one end of the first substrate, which is far away from the first flange edge 140, and after the enclosure plate 100 is manufactured, locating the plurality of notches 151 at different corners of the enclosure plate 100; a second flanged edge 150 is formed at an end of the first base plate remote from the first flanged edge 140, with the gap 151 being located in the second flanged edge 150, the second flanged edge 150 being for connection with the smoke cage. This arrangement effectively avoids the second flange 150 from cracking at the corners when bent to form the corners of the shroud 100.

In this embodiment, the first flange 140 and the second flange 150 are formed simultaneously, thereby further improving the efficiency.

In this embodiment, the shape of the enclosing plate 100 is quadrilateral, and the step of manufacturing the enclosing plate 100 further includes: bending the first substrate to form two corners of the enclosure 100 near the rivet 120 and the groove 130; the first base plate is bent to form the other two corners of the shroud 100.

In summary, in the present embodiment, the step of manufacturing the shroud 100 includes:

s110: a plurality of riveting sheets 120 and a plurality of grooves 130 are respectively formed at the head end and the tail end of the first substrate, and the plurality of riveting sheets 120 and the plurality of grooves 130 are in one-to-one correspondence; forming a plurality of notches 151 at one end of the first substrate, which is used for being connected with the top plate 200, wherein the notches 151 are located at different corners of the enclosure 100 after the enclosure 100 is manufactured;

s120: punching a hole in a main body portion of a first substrate;

s130: forming a first flange edge 140 at an end of the first substrate away from the gap 151; a second flange edge 150 is formed at one end of the enclosing plate 100 provided with the notch 151, the notch 151 is located on the second flange edge 150, and the second flange edge 150 is used for being connected with the smoke collecting cover;

s140: bending the first substrate to form two corners of the enclosure 100 near the rivet 120 and the groove 130;

s150: bending the second substrate to form the other two corners of the enclosure 100;

s160: riveting the plurality of riveting sheets 120 and the plurality of grooves 130 in a one-to-one correspondence;

s170: fasteners 160 are used to reinforce the ends and extremities of the shroud 100.

Fig. 4 is a schematic step diagram of a top plate manufacturing method in the filter screen manufacturing method provided in this embodiment.

In this embodiment, as shown in fig. 4, the step of manufacturing the top plate 200 includes:

s210: blanking to obtain a second substrate;

s220: a flange 220 is formed at the periphery of the second substrate, the flange 220 being used to press the first flange 140 to the first body 110.

Fig. 5 is a first schematic step diagram of a method for manufacturing a filter screen according to this embodiment, fig. 6 is a second schematic step diagram of the method for manufacturing a filter screen according to this embodiment, and fig. 7 is a cross-sectional view of a partial structure along the X direction of the turning edge in fig. 6.

In this embodiment, as shown in fig. 5 and 6, the step of fixedly connecting the enclosing plate 100 and the top plate 200 includes:

s310: placing the first flanged edge 140 within the flange 220;

s320: making the included angle between the flange 220 and the main body portion of the second substrate acute; specifically, the included angle between the turned-up edge 220 and the second main body 210 may be 45 ° -60 °;

s330: the angle between cuff 220 and the main portion of the second substrate is then brought to 0 deg. and both are squeezed.

In this embodiment, a plurality of protrusions 221 are formed on the side of the flange 220 adjacent to the first flange 140 when the flange 220 is pressed against the main body portion of the second substrate. In the process of flattening the turned edge 220, the protrusion 221 contacts with the first flange 140 first to limit the first flange 140, so that the first flange 140 can be effectively prevented from being separated.

Specifically, in the present embodiment, the first flange 140 is clamped between the bead 220 and the main body portion of the second base plate by a jig, and a forming portion for forming the projection 221 is provided on the jig, so that the projection 221 can be formed on the bead 220 while being pressed. Further, the burring 220 and the body portion of the second base may be pressed with a large force such that a recess corresponding to the protrusion 221 is formed at the side of the first flange 140 contacting the burring 220 while the protrusion 221 is formed at the burring 220.

Specifically, in the present embodiment, the protrusions 221 are disposed on the flange 220 at intervals, the recesses are disposed on the first flange 140 at intervals, and the recesses and the protrusions 221 are in one-to-one correspondence. When the turned-over edge 220 is flattened, that is, an included angle between the turned-over edge 220 and the main body part of the second substrate is 0 degree, the plurality of protrusions 221 and the plurality of concave parts are matched in a one-to-one correspondence manner, so that the limitation on the first flange edge 140 can be further strengthened, and the situation that the first flange edge 140 is separated from the second flange edge is further avoided; in addition, such an arrangement also improves the firmness of the connection between the shroud 100 and the top plate 200 and the structural stability of the screen.

Specifically, in the present embodiment, there are two types of structures of the protrusion 221, and in the view of fig. 5, the cross section of the protrusion 221 is arc-shaped; in the perspective of fig. 6 and 7, the projection 221 has a rectangular cross section. In other embodiments of the present application, the shape of the protrusion 221 may also be in other shapes as long as it can limit the detachment of the first flange 140, and the present application does not limit the specific structural form of the protrusion 221.

Example two

In the present embodiment, the two ends of the surrounding plate 100 along the circumferential direction are fixedly connected, and the top plate 200 is fixedly connected with the surrounding plate 100.

The filter screen that this embodiment provided, including bounding wall 100 and roof 200, and bounding wall 100 only has along the both ends fixed connection of its circumference, and hookup location is few to can solve among the prior art with the bounding wall to the roof with the same one side jack-up then with two adjacent bounding walls carry out the higher problem of cost of manufacture that the welding brought.

Specifically, the shroud 100 is provided with a mesh.

Fig. 8 is a partially expanded schematic view of a coaming of the filter screen provided in this embodiment, and fig. 9 is a schematic view of a structure of the filter screen provided in this embodiment.

Specifically, in the present embodiment, as shown in fig. 8 and 9, the two ends of the shroud plate 100 along the circumferential direction thereof are respectively provided with a plurality of rivet pieces 120 and a plurality of grooves 130, and the plurality of rivet pieces 120 and the plurality of grooves 130 are riveted in one-to-one correspondence. That is, in this embodiment, the two ends of the shroud 100 along the circumferential direction thereof are connected by riveting without welding seams, thereby greatly reducing the manufacturing cost of the shroud 100 and the filter screen.

Specifically, in the present embodiment, the rivet sheet 120 is interference-riveted with the groove 130. So set up to make difficult appearance not hard up between the two, strengthened the fastness of connection between the two.

Specifically, in this embodiment, the rivet plate 120 has a large head and a small bottom, while the recess 130 has a large bottom and a small neck. However, in other embodiments of the present application, the shapes of the rivet 120 and the groove 130 are not limited to the above-described forms as long as they can be rivet-fitted to fixedly connect both ends of the shroud 100 along its circumferential direction.

Specifically, in this embodiment, the plurality of riveting sheets 120 are disposed at intervals on the end portion of the first substrate, the plurality of grooves 130 are disposed at intervals on the end portion of the first substrate, and the connection between the two ends of the first substrate is further strengthened after the riveting sheets 120 disposed at intervals and the grooves 130 disposed at intervals are in interference fit, so that the connection between the two ends of the first substrate is firmer.

Specifically, in the present embodiment, the shape of the hole of the first body 110 is a diamond shape, however, in other embodiments of the present application, the shape of the hole may also be a circle, a hexagon, a square, or the like, which is not particularly limited in the present application.

Fig. 12 is a schematic view of a partial structure of the filter screen provided in this embodiment.

Specifically, in the present embodiment, as shown in fig. 12, both ends of the shroud 100 in the circumferential direction thereof are also fastened by fasteners 160. This arrangement enhances the fastening of the shroud 100 at both ends in its circumferential direction and the structural stability of the shroud 100.

Specifically, in this embodiment, the two ends of the shroud 100 along the circumferential direction thereof are respectively formed with a part of the through hole, the two parts of the through hole form a complete through hole, and the fastening member 160 plays a role of reinforcing the connection of the shroud 100 along the circumferential direction thereof by simultaneously clamping the two ends of the shroud 100 along the circumferential direction thereof.

More specifically, in this embodiment, the fastener 160 is a blind rivet nut. However, in other embodiments of the present application, the fastener 160 is not limited to a blind rivet nut as long as it can reinforce the connection of both ends of the shroud 100 in its circumferential direction.

In this embodiment, the blind rivet nut can also fix the filter screen to the smoke collecting hood while reinforcing both ends of the shroud 100 along the circumferential direction thereof. That is, during the installation filter screen, can make the rivet nut pass the perforation on the mounting hole on the collection petticoat pipe and the filter screen, so set up, the rivet nut can enough be fixed in the collection petticoat pipe with the filter screen, has also effectively avoided bounding wall 100 simultaneously along the separation at its circumference both ends, plays the reinforcing action.

Specifically, the shroud 100 includes a first body 110, and one end of the first body 110 connected to the top plate 200 is provided with a first flange 140; the top plate 200 includes a second body 210 and a flange 220 provided at the periphery of the second body 210, the second body 210 and the flange 220 clamping the first flange 140 therebetween.

Specifically, in the present embodiment, an end of the shroud 100 away from the first flange is provided with a second flange 150, and the second flange 150 is used for connecting with the smoke collecting hood.

Specifically, in the present embodiment, the second flange edge 150 is provided with a plurality of notches 151, and the plurality of notches 151 are located at different corners of the shroud 100.

Specifically, in the present embodiment, the flange 220 is provided with a plurality of protrusions 221 on a side thereof adjacent to the first flange 140. The protrusion 221 contacts the first flange 140 to limit the first flange 140, so that the first flange 140 can be effectively prevented from being separated.

Specifically, in the present embodiment, there are two types of structures of the protrusion 221, and in the view of fig. 5, the cross section of the protrusion 221 is arc-shaped; in the perspective of fig. 6 and 7, the projection 221 has a rectangular cross section. However, in other embodiments of the present application, the shape of the protrusion 221 may be in other shapes as long as it can limit the detachment of the first flange 140, and the present application does not limit the specific structural form of the protrusion 221.

Specifically, in this embodiment, the plurality of protrusions 221 are disposed at intervals on the flange 220, the plurality of recesses are disposed at intervals on the side of the first flange 140 contacting the flange 220, and the plurality of recesses and the plurality of protrusions 221 are in one-to-one correspondence, so that the limitation on the first flange 140 is further strengthened, and the first flange 140 is further prevented from being separated; in addition, such an arrangement also improves the firmness of the connection between the shroud 100 and the top plate 200 and the structural stability of the screen.

EXAMPLE III

The present embodiment provides a range hood, which includes the filter screen of the second embodiment, and has all the advantages of the filter screen of the second embodiment, and therefore, the description thereof is omitted here.

Example four

Fig. 3 is a schematic step view of a method for manufacturing a coaming in a method for manufacturing a filter screen according to this embodiment.

The present embodiment also provides a method for manufacturing a filter screen, as shown in fig. 3, in the method for manufacturing a filter screen, the step of manufacturing the enclosing plate 100 includes: after the first substrate is bent, the head end and the tail end of the first substrate are welded. That is, compared with the filter screen manufacturing method provided in the first embodiment, the filter screen manufacturing method provided in the present embodiment is different only in that: when the enclosure plate 100 is manufactured, the head end and the tail end of the enclosure plate 100 are welded without forming the rivet pieces 120 and the grooves 130 at the head end and the tail end of the enclosure plate 100 respectively.

The coaming 100 manufactured by the method for manufacturing the filter screen provided by the embodiment has only one welding line, and the number of the welding lines is small, so that the manufacturing cost generated by welding can be reduced, and the total cost is reduced.

EXAMPLE five

Fig. 10 is a partially expanded schematic view of a coaming of the filter screen provided in this embodiment, and fig. 11 is a schematic structural view of the filter screen provided in this embodiment.

This embodiment also provides a screen, as shown in fig. 10 and 11, in which the shroud 100 is welded along both ends in its circumferential direction. That is, compared with the filter screen provided in the second embodiment, the filter screen provided in this embodiment is different only in that: the shroud 100 is not provided with the rivet 120 or the groove 130 at both ends along its circumferential direction, but is directly welded together. The shroud plate 100 of the filter screen provided by the embodiment only has one welding seam 170, the number of the welding seams 170 is small, and the manufacturing cost is low.

EXAMPLE six

The present embodiment also provides a range hood, which includes the filter screen of the fifth embodiment, and has all the advantages of the filter screen of the fifth embodiment, and therefore, the description thereof is omitted here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a filter screen is characterized by comprising the following steps:

bending the first base plate with meshes, and fixedly connecting the head end and the tail end of the first base plate to form a coaming (100);

manufacturing a top plate (200);

fixedly connecting the shroud (100) and the top plate (200) to form the screen.

2. The method of making a screen according to claim 1, wherein the step of making the shroud (100) comprises:

before the first base plate is bent, a plurality of riveting sheets (120) and a plurality of grooves (130) are respectively formed at the head end and the tail end of the first base plate, and the riveting sheets (120) correspond to the grooves (130) one by one; after the first substrate is bent, riveting the riveting sheets (120) and the grooves (130) in a one-to-one correspondence manner;

3. The method of making a screen according to claim 2, wherein the step of making the shroud (100) further comprises: after riveting or welding the head and tail ends of the first substrate, the head and tail ends of the first substrate are reinforced by using fasteners (160).

4. The method of making a screen according to claim 2, wherein the step of making the shroud (100) comprises: forming a first flange (140) at an end of the first base plate for connection with the top plate (200) before bending the first base plate and after forming the rivet sheet (120) and the groove (130).

5. The method of making a screen according to claim 4, wherein the step of making the shroud (100) further comprises: before the first flange edge (140) is formed, forming a plurality of notches (151) at one end of the first substrate, which is far away from the first flange edge (140), and after the enclosing plate (100) is manufactured, positioning the notches (151) at different corners of the enclosing plate (100); forming a second flange edge (150) at an end of the first base plate remote from the first flange edge (140) with the gap (151) at the second flange edge (150), the second flange edge (150) being for connection with a fume collecting hood.

6. Method for making a sieve according to claim 4, wherein the step of making the top plate (200) comprises: blanking to obtain a second substrate; forming a flange (220) at the periphery of the second substrate, the flange (220) for securing the first flange (140) to the body portion of the first substrate.

7. The method of manufacturing a screen according to claim 6, wherein the step of fixedly connecting the skirt (100) and the top panel (200) comprises:

placing the first flange edge (140) in the flange (220);

making an included angle between the flange (220) and the main body part of the second substrate be an acute angle;

then, the angle between the flange (220) and the main body portion of the second base plate is made to be 0 DEG and the two are pressed.

8. The method of claim 7, wherein a plurality of protrusions (221) are formed on a side of the flange (220) adjacent to the first flange (140) when the flange (220) is pressed against the body portion of the second base plate.

9. The utility model provides a filter screen, its characterized in that includes bounding wall (100) and roof (200), both ends fixed connection along its circumference is followed to bounding wall (100), roof (200) with bounding wall (100) fixed connection.

10. The filter screen according to claim 9, wherein the shroud (100) is provided at both ends in the circumferential direction thereof with a plurality of rivet pieces (120) and a plurality of grooves (130), respectively, and the rivet pieces (120) and the grooves (130) are riveted in a one-to-one correspondence;

or the two ends of the coaming (100) along the circumferential direction are welded.

11. The filter screen of claim 10, wherein the rivet tabs (120) are interference riveted with the grooves (130).

12. The screen of claim 10, wherein the shroud (100) is fastened at both ends along its circumference by fasteners (160).

13. The filter screen according to claim 10, wherein the shroud (100) comprises a first body (110), wherein the end of the first body (110) connected to the top plate (200) is provided with a first flanged rim (140); the top plate (200) comprises a second main body (210) and a flange (220) arranged on the periphery of the second main body (210), and the first flange edge (140) is clamped between the second main body (210) and the flange (220).

14. The filter screen of claim 13, wherein an end of the shroud (100) distal from the first flanged edge (140) is provided with a second flanged edge (150), the second flanged edge (150) being for connection with a smoke collection cage.

15. The screen according to claim 14, wherein the second flanged edge (150) is provided with a plurality of indentations (151), and wherein the plurality of indentations (151) are located at different corners of the shroud (100).

16. The filter screen of claim 15, wherein the side of the bead (220) adjacent to the first flange (140) is provided with a plurality of protrusions (221).

17. A range hood comprising the filter screen of any one of claims 9-16.