CN109405261B

CN109405261B - Noise reduction structure and air conditioner

Info

Publication number: CN109405261B
Application number: CN201811260677.3A
Authority: CN
Inventors: 张挺; 杜伟; 孙臣见; 王成; 张新明; 尚凯锋
Original assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Current assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Priority date: 2018-10-26
Filing date: 2018-10-26
Publication date: 2021-04-02
Anticipated expiration: 2038-10-26
Also published as: CN109405261A

Abstract

The invention provides a noise reduction structure and an air conditioner, wherein the noise reduction structure comprises a baffle, wherein the baffle comprises a baffle body and a connecting edge; the baffle body is of a plane plate-shaped structure; the baffle body is connected with the connecting edge; the baffle is suitable for isolating an air channel formed by airflow generated by rotation of each wind wheel; the connecting edges comprise a first connecting edge and a second connecting edge; the first connecting edge is arranged on one side, close to the volute fixing plate, of the baffle body and is suitable for being fixedly connected with the volute fixing plate; the second connecting edge is arranged on one side, close to the bottom plate, of the baffle body and is suitable for being fixedly connected with the bottom plate. The noise reduction structure can eliminate the influence of vortex between wind wheels, and can be used for carding wind direction, so that the running noise of the air duct machine is reduced, and the heat exchange effect is effectively improved.

Description

Noise reduction structure and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a noise reduction structure and an air conditioner.

Background

The ducted air conditioner may also be called an air-conditioning ducted air conditioner or a ducted air conditioner, which is a common air conditioner. The tuber pipe machine has a plurality of wind wheels, and when the wind wheel number that sets up in the tuber pipe machine was three or more, the vortex that every wind wheel during operation produced can influence each other, produces the noise, influences heat transfer effect.

Disclosure of Invention

In view of this, the invention aims to provide a noise reduction structure to solve the technical problems that vortexes generated by each wind wheel during working can affect each other, generate noise and affect the heat exchange effect.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a noise reduction structure comprises a baffle plate, wherein the baffle plate comprises a baffle plate body and a connecting edge; the baffle body is of a plane plate-shaped structure; the baffle body is connected with the connecting edge; the baffle is suitable for isolating an air channel formed by airflow generated by rotation of each wind wheel; the connecting edges comprise a first connecting edge and a second connecting edge; the first connecting edge is arranged on one side, close to the volute fixing plate, of the baffle body and is suitable for being fixedly connected with the volute fixing plate; the second connecting edge is arranged on one side, close to the bottom plate, of the baffle body and is suitable for being fixedly connected with the bottom plate.

Furthermore, a gap is formed between the baffle body and the first connecting edge and between the baffle body and the second connecting edge, and the shape of the gap is matched with the connecting section of the volute casing fixing plate and the bottom plate.

Furthermore, the upper end face of the baffle body is of a curved surface structure, the curved surface structure is matched with one surface of the water receiving tray, which is close to the curved surface structure, in shape, and a gap is formed between the curved surface structure and the water receiving tray.

Further, the baffle body comprises a reinforcing rib, and the reinforcing rib is located on the surface of the baffle body.

Furthermore, the noise reduction structure also comprises an air guide component; the air guide piece is arranged in a gap between the evaporator assembly and the bottom plate; the air guide piece comprises an air guide piece body and a connecting plate; the air guide piece body is fixedly connected with the connecting plate;

the air guide member body comprises a guide part; the thickness of the guide part is gradually reduced from one side far away from the connecting plate to the direction close to the connecting plate until the thickness of the guide part is the same as that of the connecting plate.

Furthermore, the air guide piece body also comprises an extension part, and the cross section of the extension part is rectangular; the extension part is close to one side of the air outlet and is fixedly connected with the guide part.

Furthermore, the connecting plate and the guide part are connected into a whole through arc transition.

Further, after installation, the range of the vertical distance a between the upper surface of the guide portion and the outer side edge of the evaporator assembly is: 10-25 mm.

Compared with the prior art, the noise reduction structure has the following advantages:

(1) the noise reduction structure can eliminate the influence of vortex between wind wheels, and can be used for carding wind direction, so that the running noise of the air duct machine is reduced, and the heat exchange effect is effectively improved.

(2) The baffle plate of the noise reduction structure can change the air channel of the wind wheel, and the connecting edge arranged on the baffle plate is fixedly connected with the bottom plate and the volute fixing plate, so that the connecting stability of the baffle plate is enhanced;

(3) the air guide piece of the noise reduction structure has the function of air guide and also can play a role of heat preservation;

the invention also aims to provide an air conditioner to solve the technical problems that vortexes generated by each wind wheel during working can affect each other, generate noise and affect the heat exchange effect.

an air conditioner comprising the noise reduction structure of any one of the above.

The air return cover plate comprises an air return cover plate body, and a third connecting edge and a fourth connecting edge are arranged on two sides of the air return cover plate body in the width direction; the third connecting edge is parallel to the air return cover plate body; the third connecting edge is vertical to the air return cover plate body; the third connecting edge is connected with the top plate; the fourth connecting edge is connected with the rear panel;

the third connecting edge comprises an inserting sheet and a flange; the inserting pieces and the flanges are arranged at intervals; the distance formed between the horizontal end of the inserting piece and the horizontal plane of the flange is suitable for the insertion of the top plate.

Compared with the prior art, the air conditioner has the same advantages as the noise reduction structure, and the details are not repeated.

Except that the advantages of the noise reduction structure are the same as those of the noise reduction structure in the prior art, the return air cover plate of the air conditioner can effectively improve the assembly efficiency and reduce the use of parts such as screws and the like.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a structural view of a noise reducing structure mounted on an air conditioner in embodiments 1 to 9 of the present invention;

FIG. 2 is a view showing a structure in which a baffle plate is installed in an air conditioner in embodiments 1 to 5 of the present invention;

FIG. 3 is a front view of a baffle plate in embodiment 1 of the present invention;

FIG. 4 is a structural view of a baffle plate in embodiment 1 of the invention;

FIG. 5 is a structural view of a first connecting edge of a baffle plate in embodiments 1 and 4 of the present invention;

FIG. 6 is a structural view of a second connecting edge of the baffle in embodiments 1 and 4 of the present invention;

FIG. 7 is a structural view of reinforcing ribs of a baffle plate in embodiment 3 of the invention;

fig. 8 is a perspective view of the air guide in embodiments 6 to 9 of the present invention;

fig. 9 is a plan view of the air guide in embodiments 6 to 9 of the present invention;

fig. 10 is a front view of the wind guide according to embodiments 6 to 9 of the present invention;

fig. 11 is a left side view of the wind guide in embodiments 6 to 9 of the present invention;

fig. 12 is a structural view of the air guide member mounted on the air conditioner in embodiments 6 to 9 of the present invention;

fig. 13 is a schematic view illustrating an increase in the air outlet area of the lower portion of the ducted air conditioner after the air guide is installed in embodiment 6 to 9 of the present invention;

fig. 14 is a schematic view of the air return cover plate of embodiment 11 of the present invention installed in an air conditioner;

fig. 15 is a structural view of a return air cover plate of embodiment 12 of the invention;

fig. 16 is a perspective view of a return air cover in accordance with embodiments 12-17 of the present invention;

FIG. 17 is a structural view of a third connecting side in embodiments 11 and 13 of the present invention;

FIG. 18 is a structural view of a binding and inserting sheet according to example 16 of the present invention;

FIG. 19 is an enlarged view of an insert according to example 16 of the present invention;

FIG. 20 is a sectional view of an insert in an air conditioner according to embodiment 16 of the present invention;

FIG. 21 is an enlarged view of an insert in an air conditioner according to example 16 of the present invention;

FIG. 22 is a structural view of a tablet of example 17 of the present invention.

Description of reference numerals:

1-baffle, 11-connecting edge, 111-first connecting edge, 1100-screw hole, 1110-first screw hole, 112-second connecting edge, 1120-second screw hole, 12-baffle body, 13-reinforcing rib, 2-wind wheel, 3-volute fixing plate, 4-bottom plate, 6-evaporator component, 61-outer side edge of evaporator, 7-wind guide, 71-wind guide body, 711-extension part, 712-guide part, 72-connecting plate, 8-return cover plate, 81-return cover plate body, 82-third connecting edge, 83-fourth connecting edge, 821-inserting piece, 8211-bending part, 8212-inserting tongue part, 822-baffle edge, 8221-screw hole, 84-edge covering, 85-convex surface part, 9-tabletting and 10-top plate.

Detailed Description

The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate directions or positional relationships, and refer to orientations or positional relationships shown in the drawings; these positional relationships are merely for convenience and simplicity of description and do not indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation and therefore should not be construed as limiting the invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1-7, a noise reduction structure includes a baffle 1, where the baffle 1 is disposed at a volute fixing plate 3 outside a wind wheel 2 and corresponds to a space between the two wind wheels 2, and is used for isolating an air duct formed by airflow generated by rotation of each wind wheel 2 in a wind pipe machine. The use effect of the baffles and the cost of the air conditioner are integrated, and the optimal number of the baffles for mounting the air conditioner is 2; so as to ensure the balance of heat exchange of the whole evaporator. Such as: 1-2 partition plates can be arranged under the condition of the three wind wheels, 1 partition plate is optimally installed, and the installation position is far away from one end of the capillary tube assembly.

The baffle 1 comprises a baffle body 12 and a connecting edge 11, wherein the baffle body 12 is of a plate-shaped structure; the baffle body 12 is connected with the connecting edge 11.

The connecting edge 11 comprises a first connecting edge 111 and a second connecting edge 112; the first connecting edge 111 is arranged on one side of the baffle body 12 close to the volute fixing plate 3 and is fixedly connected with the volute fixing plate 3; the second connecting edge 112 is disposed on a side of the baffle body 12 close to the bottom plate 4, and is adapted to be fixedly connected with the bottom plate 4. The first connecting edge 111 and the second connecting edge 112 are respectively perpendicular to the baffle body 12 and are integrally formed with the baffle body 12; the first connecting edge 111 is fixedly connected with the baffle body 12 and the volute fixing plate 3 of the air duct machine; the second connecting edge 112 is fixedly connected with the baffle body 12 and the bottom plate 4 of the air duct machine. The connection side can effectively enhance the connection stability of the baffle.

As shown in fig. 1-4, the present embodiment is different from embodiment 1 in that the upper portion of the baffle body 12 is a curved surface, the shape of the curved surface is matched with the shape of a water receiving surface of a water receiving tray (not shown) of the wind pipe machine, and a gap is formed between the curved surface and the water receiving tray. The gap can ensure the normal dripping and outflow of the condensation of the evaporator, and the normal operation of the water pan is ensured.

The baffle plate can change the air channel, eliminate the vortex influence between the wind wheels, card the wind direction, reduce the running noise of the air pipe machine and effectively improve the heat exchange effect.

Example 2

As shown in fig. 1 and 2, the present embodiment is different from the above embodiment 1 in that a gap is formed between the baffle body 12 and the first connecting edge 111 and the second connecting edge 112, and the shape of the gap is matched with the connecting section of the volute casing fixing plate 3 and the bottom plate 4. Can guarantee baffle 1 and the inseparable laminating of spiral case fixed plate 3 and bottom plate, prevent that long-time air conditioner vibration from making the baffle not hard up to drop.

Example 3

As shown in fig. 7, the present embodiment is different from embodiment 1 in that the surface of the baffle body 12 is further provided with at least two ribs 13, and the ribs are respectively arranged in different directions. Preferably, the shape of the reinforcing rib 13 is an "X" shaped structure or a "triangular" shaped structure; the reinforcing ribs 13 are arranged on one side or two sides of the baffle body 12, and whether one side is arranged on the left side or the right side can be automatically arranged according to the wind direction and the type of the air conditioner; the shape of the reinforcing ribs 13 can be set according to the type of the air conditioner and the weight of the baffle body 12, and the shape capable of realizing the function of the reinforcing ribs can be any shape. The reinforcing ribs can strengthen the stable structure, and effectively prevent the baffle from shaking caused by overlarge wind power. The rib structure is more stable, the strength is high, the baffle plate is not easy to break, the strength of the baffle plate 1 is further enhanced, the bearing capacity of the baffle plate 1 is improved, and therefore the safety performance is improved.

Example 4

As shown in fig. 5 and 6, the present embodiment is different from the above embodiments in that a screw hole 1100 is formed on the connecting edge 11, a first screw hole 1110 is further formed on the first connecting edge 111, and the first connecting edge 111 is matched with a screw through the first screw hole 1110 to fixedly connect the volute casing fixing plate 3; the connection strength of the baffle plate 1 and the volute fixing plate 3 is increased, and shaking of the partition plate due to overlarge wind power is prevented.

The second connecting edge 112 is also provided with a second screw hole 1120, and the second connecting edge 112 is matched with a screw through the second screw hole 1120 to fixedly connect the bottom plate 4; increase joint strength for being connected of baffle 1 and bottom plate 4, prevent to rock because too big the production of wind-force to the baffle.

First screw hole 1110 and second screw hole 1120 simple structure, it is with low costs, and small, can not cause the influence to the stability of baffle 1 installation, and when baffle 1 broke down or need the maintenance, thereby only need pull down corresponding screw through first screw hole 1110 and second screw hole 1120 and just can demolish baffle 1 and carry out the maintenance and the maintenance of baffle 1, the problem of the baffle 1 of field maintenance tuber pipe machine and other peripheral parts operational difficulties has been solved, the installation is dismantled conveniently, simple manufacture.

Example 5

As shown in fig. 1, the difference between the present embodiment and the above embodiments is that when the baffle is installed in the air conditioner, the range of the distance C from the edge of the baffle body 12 close to the volute outlet is: 30-45 mm; the preferred distance is 38 mm; this distance can be better comb wind direction, improves the availability factor of wind, improves the heat transfer effect.

As shown in fig. 1, the present embodiment is different from the above embodiments in that the range of the distance B from the volute outlet to the air conditioner outlet is: 199 ~ 219mm, synthesize different models, the distance B is with the ratio of distance C: d, i.e.

The numerical range of the ratio D is: 4.4-7.3. When the ratio D is too small, the use effect of the baffle is reduced; when the value D is too large, the fin sound is easy to occur in the direct-blowing evaporator with the air out of the volute. Preferably, the value of the ratio D is: 5.5, the setting of the distance B between the volute air outlet and the air conditioner air outlet and the distance C between the edge of the baffle body 12 close to one side of the volute air outlet and the volute air outlet can improve the use efficiency of wind, improve the heat exchange effect and reduce the noise of the air conditioner.

When the air pipe machine works, the wind wheels 2 rotate to form air flow, the air flow is blown out from the gap of the volute fixing plate 3, and due to the existence of the baffle plate 1, the air flow between the adjacent wind wheels 2 is not influenced mutually and flows according to respective air channels. The invention effectively reduces the noise of the traditional wind pipe machine caused by the interaction of the airflow vortexes generated by the rotation of the adjacent wind wheels, and simultaneously, the baffle plate isolates the airflow vortexes generated by the rotation of the adjacent wind wheels, thereby effectively improving the heat exchange effect of the air conditioner.

Example 6

As shown in fig. 1, 8-13, the noise reducing structure further comprises: the air guide 7, the air guide 7 is set up between bottom and bottom plate 4 of the evaporator assembly 6; the air guide piece comprises an air guide piece body 71 and a connecting plate 72, wherein the air guide piece body 71 is fixedly connected with the connecting plate 72; the air guide body 71 comprises a guide part 712, and the thickness of the guide part 712 gradually decreases from the side far away from the connecting plate 72 to the side close to the connecting plate 72 until the thickness is the same as that of the connecting plate 72; the guiding portion 712 is located at one side of the air outlet, and the connecting plate is located at one side far away from the air outlet. The guide portion 712 can effectively reduce the generation of eddy current.

The air guide member body 71 further includes an extension portion 711, and the cross section of the extension portion 711 is rectangular; the extension 711 is fixed to the guide 712 near the outlet. The thickness of the extension 711 is the same as the height from the bottom plate 4 to the air outlet, and the air generated by the fan assembly can be better guided out to the air outlet.

The connecting plate 72 has a plate-like structure. The air guide piece body 71 and the connecting plate 72 are connected into a whole through arc transition, and the installation efficiency is further improved. Wherein the corner of the bottom of the evaporator assembly 6 is directly abutted against the surface of the connecting plate 72, which can further prevent the evaporator assembly from shaking to cause noise.

The air guide 7 is fixedly connected with the bottom plate 4; preferably, the air guide member 7 is provided with a threaded opening matched with the bottom plate, and the air guide member is connected with the bottom plate through a screw, so that the air guide member is effectively detached.

As shown in fig. 1 and 8 to 13, the air guide body 71 is integrally formed with the connection plate 72. The integrated into one piece can reduce the work when air guide body and connecting plate installation, effectual improvement installation effectiveness and reduce the cost. The air guide member 7 of the invention reduces the gap between the evaporator assembly and the bottom plate, enhances the connecting effect and the sealing effect, reduces the running noise of the air pipe machine, leads the air flow to be in natural transition and improves the refrigeration and heating efficiency.

Example 7

As shown in fig. 1 and 8 to 13, the present embodiment is different from the above-described embodiments in that the air guide 7 of the present embodiment is made of a foamed plastic. The air guide 7 of the existing air duct machine is made of sponge materials, so that powder can be generated due to aging of materials after long-time use, normal operation of the machine is influenced, and indoor air pollution can be caused. The air guide piece is made of foam materials, can block heat loss, prevents condensation from being generated, and can play a role in air guide.

Example 8

As shown in fig. 1, 8-13, in the present embodiment, the guiding portion 712 is a smooth plane, and the included angle a between the smooth plane and the lower surface of the evaporator assembly is in the range: 2-6 degrees; preferably, the included angle a is: 4 degrees. The included angle is used for adapting to the motion characteristic of wind along the curved surface, as shown in the attached figure 13, the air output of the lower part of the air pipe machine is increased by 5-7%, the air output distance of the lower part is increased by 1m, and the comfort level of a user is increased.

Example 9

As shown in fig. 1, 8-13, the present embodiment differs from the above embodiments in that, after installation, the vertical distance a between the upper surface of the guide portion 712 and the outer side edge 61 of the evaporator assembly is within the range of: 10-25 mm, preferably, the vertical distance a between the upper surface of the guiding part 712 and the outer side 61 of the evaporator assembly is: 16 mm. The distance is set for the dredging part to lift the air conditioner to blow to the air outlet, so as to prevent the formation of vortex, reduce the noise by 1.0dB and reduce the air loss by 9-12%.

Example 10

An air conditioner comprising a noise reducing structure as described in embodiments 1-9 above. The air conditioner provided by the invention can effectively change the air channel, eliminate the eddy influence between the wind wheels, comb the wind direction, reduce the operation noise of the air pipe machine and effectively improve the heat exchange effect.

Example 11

As shown in fig. 14, the difference between this embodiment and the above-mentioned embodiment 13 is that the air conditioner of this embodiment further includes a return air cover plate 8, the return air cover plate 8 includes a return air cover plate body 81, the return air cover plate body 81 is a plate-shaped structure, and a third connecting edge 82 and a fourth connecting edge 83 are disposed along two sides of the return air cover plate body 81 in the width direction; the third connecting edge 82 is parallel to the return air cover plate body 81; the fourth connecting edge 83 is perpendicular to the return air cover plate body 81; the third connecting edge 82 is connected to the top plate 10; the third connecting edge 82 is connected with the rear panel;

the third connecting edge 82 comprises an inserting sheet 821 and a blocking edge 822, wherein the inserting sheet 821 and the blocking edge 822 are arranged at intervals; the horizontal end of the insert 821 is positioned below the rib 822; the distance formed between the horizontal end of tab 821 and the horizontal surface of rib 822 can facilitate the insertion of top panel 10. When the air return cover plate 8 is inserted into the top plate 10, the insert 821 is inserted into the top plate 10 and contacts with the inner surface of the top plate 10; the rib 822 is located above the top plate 10 and contacts the outer surface of the top plate 10. This embodiment the return air apron, fix the return air apron through inserted sheet and flange complex mode, when improving assembly efficiency, can reduce the use of parts such as screw.

Example 12

As shown in fig. 15 to 17, the present embodiment is different from the above embodiments in that a screw port 8221 is further provided in the rib 822, and the screw port 8221 is matched with the screw port of the top plate 10, so that the connection relationship between the return air cover plate 8 and the top plate 10 is fixed by screws. The position of screw port 8221 can be set up according to roof 10 screw port correspondence, and the specific quantity of screw port can be set up according to the model of air conditioner. This embodiment return air apron, fix the return air apron through the mode that adds the screw combination on inserted sheet, separation blade and baffle, when improving assembly efficiency, further consolidation return air apron's relation of connection.

Example 13

As shown in fig. 16, the present embodiment is different from the above embodiments in that the return air cover plate 8 further includes two covered edges 84, which are respectively located at the left and right side edges of the return air cover plate body 81; and are respectively connected with the left and right lateral plates.

The left wrapping edge positioned on the air return cover plate body 81 is inclined relative to the left side of the air return cover plate body 81 and towards the direction of the air return cover plate body 81; the right edge of the return air cover plate body 81 is inclined toward the direction of the return air cover plate body 81 with respect to the right side of the return air cover plate body 81. After the installation, the two covered edges 84 are positioned at the inner sides of the left and right side plates and are jointed with the inner surfaces of the left and right side edges. The covering edge 84 is located on one side of the third connecting edge 82 and is fixedly connected with the fourth connecting edge 83. And the third connecting edge 82 is positioned at one side and is clamped with the inner volute plate. The return air apron, through the borduring that sets up can be connected the return air apron further with the return air apron with left and right curb plate, further firm return air apron's connection.

Example 14

As shown in fig. 15 and 16, the present embodiment is different from the above embodiments in that the return air cover plate body 81 is further provided with a convex portion 85, the convex portion 85 protrudes outward relative to the return air cover plate body 81, and the return air cover plate body 81 and the convex portion 85 are integrally formed. The convex surface portion 85 can play a role in improving the air return effect, and meanwhile, when an accident happens, such as the air pipe machine falls, the buffering effect can be achieved, and the air pipe machine is protected.

This embodiment return air apron, return air apron surface set up the bellying, reinforcing wind-guiding effect, can also play the cushioning effect when accident such as tuber pipe machine falls, protection air conditioner simultaneously.

Example 15

As shown in fig. 17, the present embodiment is different from the above embodiments in that a snap opening 831 connected with the rear panel is further provided on the fourth connecting edge 83; is connected with the fastener on the back panel. The number of the buckling openings 831 corresponds to that of the buckling pieces of the rear panel, the number of the buckling openings 831 is not limited, and the buckling openings can be automatically set according to the type of an air conditioner.

The fourth connecting edge 83 is further provided with a screw port 8221 for further fixing the connection between the fourth connecting edge 83 of the return air cover plate body 81 and the rear panel. The number of the screw ports 8221 is not limited, and the screw ports can be set by self according to the type of the air conditioner.

The return air apron, with the return air apron further carry out the buckle with the rear panel and be connected, the effectual relation of being connected of consolidating return air apron and rear panel.

Example 16

As shown in fig. 18 to 21, the present embodiment is different from the above embodiments in that the insert 821 includes a bent portion 8211 and a tongue portion 8212; the bent part 8211 is connected with the air return cover plate body 81; the tongue inserting portion 8212 is connected with the bending portion 8211; the included angle scope of the first included angle H formed by the plane of the bending portion 8211 and the return air cover plate body 81 is: 100-: 106 deg. The angle of a first included angle H formed by the bent part 8211 and the horizontal plane of the air return cover plate body 81 is too large, so that a large air leakage triangular area is easily formed; when the thickness is too small, the folded edge is easily cracked.

The included angle scope of the second included angle F formed between bending portion 8211 and tongue insertion portion 8212 is: 102-108 °; preferably, the included angle range of the second included angle F is: 105 deg.. When the angle of second contained angle F is undersize, the assembly degree of difficulty increases, and when too big, the buckle firmness is not enough, easily produces vibrations noise.

As shown in fig. 20 and 21, after installation, the distance E between the tongue portion 8212 and the volute casing plate is: 6-10mm, preferably E is 8 mm. When the distance E is too large or too small, the installation difficulty is increased.

Example 17

As shown in fig. 22, the present embodiment is different from the above embodiments in that after the return air cover plate 8 is installed, a pressing piece 9 is further provided on the return air cover plate 8, and the pressing piece 9 is used to further connect the return air cover plate 8 and the rear panel. The position setting of preforming 9 is in the intermediate position of return air apron 8, prevents because preforming position deviation central point, leads to return air apron and back panel junction to appear the gap, and leads to leaking out.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A noise reduction structure is characterized by comprising a baffle (1), wherein the baffle (1) comprises a baffle body (12) and a connecting edge (11); the baffle body (12) is of a plane plate-shaped structure; the baffle body (12) is connected with the connecting edge (11); the baffle is suitable for isolating an air channel formed by airflow generated by rotation of each wind wheel (2); the connecting edge (11) comprises a first connecting edge (111) and a second connecting edge (112); the first connecting edge (111) is arranged on one side, close to the volute fixing plate (3), of the baffle body (12) and is suitable for being fixedly connected with the volute fixing plate (3); the second connecting edge (112) is arranged on one side, close to the bottom plate (4), of the baffle body (12) and is suitable for being fixedly connected with the bottom plate (4);

the noise reduction structure also comprises an air guide component (7); the air guide piece (7) is arranged between the evaporator assembly (6) and the bottom plate (4); the air guide (7) comprises an air guide body (71) and a connecting plate (72); the air guide piece body (71) is fixedly connected with the connecting plate (72);

the air guide body (71) includes a guide portion (712); the thickness of the guide part (712) gradually decreases from the side far away from the connecting plate (72) to the side close to the connecting plate (72) until the thickness of the guide part is the same as that of the connecting plate (72).

2. Noise reduction structure according to claim 1, characterized in that a gap is formed between the baffle body (12) and the first connecting edge (111) and the second connecting edge (112), and the shape of the gap matches the connecting section of the volute securing plate (3) and the bottom plate (4).

3. The noise reduction structure according to claim 2, wherein the upper end surface of the baffle body (12) is a curved surface structure, the curved surface structure is matched with a surface of the water pan, which is close to the curved surface structure, in shape, and a gap is formed between the curved surface structure and the water pan.

4. Noise reducing structure according to claim 1, characterized in that the baffle body (12) comprises stiffening ribs (13), which stiffening ribs (13) are located on the surface of the baffle body (12).

5. The noise reduction structure according to claim 1, wherein the air guide body (71) further includes an extension portion (711), and a horizontal cross section of the extension portion (711) is a rectangle; the extension part (711) is close to one side of the air outlet and is fixedly connected with the guide part (712).

6. Noise reducing structure according to claim 1, characterized in that the web (72) is integrally connected to the guide (712) by a circular arc transition.

7. A noise reducing structure according to claim 6, characterized in that the vertical distance A between the upper surface of the guide (712) and the outer side edge (61) of the evaporator assembly (6) after mounting is in the range: 10-25 mm.

8. An air conditioner characterized by comprising the noise reduction structure according to any one of claims 1 to 7.

9. The air conditioner as claimed in claim 8, further comprising a return air cover plate (8), wherein the return air cover plate comprises a return air cover plate body (81), and a third connecting edge (82) and a fourth connecting edge (83) are arranged on two sides of the return air cover plate body (81) in the width direction; the third connecting edge (82) is parallel to the return air cover plate body (81); the third connecting edge (82) is vertical to the return air cover plate body (81); the third connecting edge (82) is connected with the top plate (10); the fourth connecting edge (83) is connected with the rear panel;

the third connecting edge (82) comprises an inserting sheet (821) and a blocking edge (822); the inserting pieces (821) and the flanges (822) are arranged at intervals; the distance formed between the horizontal end of the inserting sheet (821) and the horizontal surface of the rib (822) is suitable for inserting the top plate (10).