CN218295945U

CN218295945U - Air duct machine

Info

Publication number: CN218295945U
Application number: CN202221655791.8U
Authority: CN
Inventors: 杜辉; 刘华; 朱江程; 陈博强; 夏凯
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2023-01-13
Anticipated expiration: 2032-06-29

Abstract

The utility model discloses a ducted air conditioner, which comprises a shell and a centrifugal fan, wherein the centrifugal fan is arranged in the shell, a return air inlet is arranged on the shell, the centrifugal fan comprises a volute, the volute is provided with an air inlet, the volute is also provided with a pair of side walls which are oppositely arranged, and the air inlet is positioned on the side walls; a return air channel is formed between the side wall and the inner wall of the shell of the air pipe machine, and the air inlet is communicated with the return air inlet through the return air channel; in the direction from the air inlet of the volute to the air return inlet of the shell, the flow area of the air return channel is gradually increased. The utility model discloses an air duct machine is when the operation, and during the air current passed through the return air inlet and got into the return air passageway, rethread return air passageway got into the air intake of spiral case, because in the direction at the air intake of spiral case to the return air inlet of casing, the area of flow passing of return air passageway crescent, that is to say, compare with prior art, because the resistance that receives when centrifugal fan breathes in is littleer, consequently, centrifugal fan inspiratory airflow can be more, and the noise is also littleer.

Description

Air duct machine

Technical Field

The utility model relates to an air conditioner technical field, concretely relates to tuber pipe machine.

Background

The air duct machine is one of air conditioners, the existing air duct machine generally adopts a centrifugal fan, and in the use process of the centrifugal fan, air inlets of the centrifugal fan are arranged on two sides of a volute, and the air inlets of the air duct machine are generally a lower air inlet or a side air inlet, so that the air inlet condition of the centrifugal fan is limited, namely return air enters from between the volute and a shell, a return air channel is narrow, air inlet resistance is large, and the air volume of the air duct machine is small and the noise is large.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a tuber pipe machine has solved centrifugal fan's among the current tuber pipe machine return air passageway narrowly, leads to the amount of wind of tuber pipe machine little, the big problem of noise.

The utility model discloses a ducted air conditioner, which comprises a shell and a centrifugal fan, wherein the centrifugal fan is arranged in the shell, a return air inlet is arranged on the shell, the centrifugal fan comprises a volute, the volute is provided with an air inlet, the volute is also provided with a pair of side walls which are oppositely arranged, and the air inlet is positioned on the side walls; a return air channel is formed between the side wall and the inner wall of the shell of the air pipe machine, and the air inlet is communicated with the return air inlet through the return air channel; and the flow area of the return air channel is gradually increased in the direction from the air inlet of the volute to the return air inlet of the shell.

Furthermore, the number of the air inlets is two, and each air inlet is located on one side wall.

Furthermore, the number of the centrifugal fans is multiple, the centrifugal fans are arranged at intervals, a common air duct is formed between the side walls of two adjacent centrifugal fans, and the air inlets of the two centrifugal fans are communicated with the air return opening of the shell through the common air duct; and the flow area of the public air duct is gradually increased in the direction from the air inlet of the centrifugal fan to the air return inlet of the shell.

Further, the centrifugal fan further comprises: the flow diffuser is arranged on the volute and provided with a flow diffusing channel, the first end of the flow diffusing channel is communicated with the interior of the volute, and the second end of the flow diffusing channel forms an air outlet of the centrifugal fan; and the flow area of the flow expansion channel is gradually increased upwards from the first end to the second end of the flow expansion channel.

Further, the air duct machine further comprises a heat exchanger, the heat exchanger is arranged in the shell, the centrifugal fan is located between the heat exchanger and the air return opening, and the second end of the flow expansion channel faces the heat exchanger.

Further, the air outlet range of the diffuser covers all heat exchange areas of the heat exchanger.

Further, the centrifugal fan still includes: the motor support is arranged in the air return channel and is provided with a hollow structure.

Furthermore, the hollowed-out structure is an overflowing hole formed in the motor support, a flanging or edge folding structure is arranged on the motor support, and the flanging or edge folding structure is located at the position of the overflowing hole.

Further, the volute includes a first portion and a second portion that are removably connected.

Furthermore, the centrifugal fan further comprises a centrifugal fan blade, the centrifugal fan blade is arranged in the volute, and the centrifugal fan blade is close to the blade at the position of the air inlet and is arranged in an inclined mode.

The utility model discloses an air duct machine is when the operation, and during the air current passed through the return air inlet and got into the return air passageway, rethread return air passageway got into the air intake of spiral case, because in the direction at the air intake of spiral case to the return air inlet of casing, the area of flow passing of return air passageway crescent, that is to say, compare with prior art, because the resistance that receives when centrifugal fan breathes in is littleer, consequently, centrifugal fan inspiratory airflow can be more, and the noise is also littleer.

Drawings

Fig. 1 is a schematic structural diagram of an air duct machine according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a centrifugal fan of the air duct machine according to the embodiment of the present invention;

fig. 3 is a side view of a centrifugal fan of a ducted air conditioner according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a centrifugal fan of an air duct machine according to another embodiment of the present invention;

fig. 5 is an assembly view of a centrifugal fan of a ducted air conditioner in accordance with an embodiment of the present invention;

fig. 6 is a schematic structural view of a centrifugal fan blade of the air duct machine according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a volute of the ducted air conditioner according to an embodiment of the present invention;

legend: 10. a housing; 11. an air return inlet; 20. a centrifugal fan; 21. a volute; 21a, a first portion; 21b, a second portion; 211. an air inlet; 212. a side wall; 213. a centrifugal fan blade; 31. an air return channel; 32. a common air duct; 40. a diffuser; 41. a flow expansion channel; 50. a heat exchanger; 51. a secondary heat exchange area; 60. an air outlet gap; 70. a motor bracket; 71. a hollow structure.

Detailed Description

As shown in fig. 1, the embodiment of the present invention discloses an air duct machine, which comprises a casing 10 and a centrifugal fan 20, wherein the centrifugal fan 20 is disposed in the casing 10, and the casing 10 is provided with an air return opening 11.

As shown in fig. 1 and 2, the centrifugal fan 20 includes a volute 21, the volute 21 has an air inlet 211, the volute 21 further has a pair of side walls 212 disposed opposite to each other, and the air inlet 211 is located on the side walls 212; a return air channel 31 is formed between the side wall 212 and the inner wall of the shell 10 of the air duct machine, and the air inlet 211 is communicated with the return air inlet 11 through the return air channel 31; the flow area of the return air passage 31 gradually increases in the direction from the air inlet 211 of the scroll casing 21 to the return air inlet 11 of the housing 10.

The utility model discloses an air duct machine is when the operation, and the air current passes through in the return air inlet 11 gets into return air passageway 31, and rethread return air passageway 31 gets into spiral case 21's air intake 211, because in the direction of spiral case 21's air intake 211 to casing 10's return air inlet 11, the area of overflowing of return air passageway 31 crescent, that is to say, compare with prior art, because the resistance that receives when centrifugal fan 20 breathes in is littleer, consequently, centrifugal fan 20 inspiratory airflow can be more, and the noise is also littleer.

It should be noted that, in the present embodiment, the flow area of the return air channel 31 is gradually increased because the side walls 212 are disposed obliquely, and the two side walls 212 form an included angle. This is advantageous in that not only the flow area of the return air channel 31 gradually increases in the direction from the air inlet 211 of the volute casing 21 to the return air inlet 11 of the housing 10, but also, since the air inlet 211 is disposed on the side wall 212, when the side wall 212 inclines, the air inlet 211 of the volute casing 21 also inclines toward the return air inlet 11, so that the included angle between the flow surface of the air inlet 211 and the flow surface of the return air inlet 11 is smaller than 90 degrees, and the turning angle of the air flow after entering the return air inlet 11 is also reduced, thereby further reducing the loss of the air flow and improving the air inlet efficiency of the centrifugal fan 20. However, this is not limitative, and in some other embodiments not shown in the drawings, the inner wall of the housing 10 may be inclined, and also included in the protection scope of the present invention.

The number of the air inlets 211 is two, and each air inlet 211 is located on one side wall 212. Through setting up two air intakes 211, can improve air inlet efficiency.

As shown in fig. 1, the number of the centrifugal fans 20 is multiple, the centrifugal fans 20 are arranged at intervals, a common air duct 32 is formed between the side walls 212 of two adjacent centrifugal fans 20, and the air inlets 211 of the two centrifugal fans 20 are both communicated with the air return opening 11 of the housing 10 through the common air duct 32; the flow area of the common air duct 32 gradually increases in the direction from the air inlet 211 of the centrifugal fan 20 to the air return opening 11 of the housing 10. Through forming the contained angle with two lateral walls 212, when a plurality of centrifugal fan 20 are adjacent to be set up, the flow surface of the public wind channel 32 between two adjacent centrifugal fan 20 also can be in the direction of air intake 211 to air outlet crescent to reduce inspiratory resistance, improve the flow, noise abatement.

As shown in fig. 2 and fig. 3, the centrifugal fan 20 further includes a diffuser 40, the diffuser 40 is disposed on the scroll 21, the diffuser 40 has a diffuser passage 41, a first end of the diffuser passage 41 is communicated with the inside of the scroll 21, and a second end of the diffuser passage 41 forms an air outlet of the centrifugal fan 20; the flow area of the flow expansion channel 41 gradually increases upward from the first end to the second end of the flow expansion channel 41. By arranging the flow expander 40, the air outlet area can be enlarged through the flow expanding channel 41, so that the air outlet amount is increased, and the heat exchange efficiency is improved.

As shown in fig. 1, the duct machine further includes a heat exchanger 50, the heat exchanger 50 is disposed in the casing 10, the centrifugal fan 20 is located between the heat exchanger 50 and the air return opening 11, and the second end of the flow expansion channel 41 is disposed toward the heat exchanger 50. Because the second end of the flow expansion channel 41 is arranged towards the heat exchanger 50, the air outlet range of the flow passage after expansion can cover more heat exchange areas of the heat exchanger 50, so that the utilization rate of the heat exchanger 50 is improved, and the heat exchange efficiency is further improved.

Preferably, the outlet air range of the diffuser 40 covers all the heat exchange areas of the heat exchanger 50. As shown in fig. 1, when there are a plurality of centrifugal fans 20, because the centrifugal fans 20 are arranged at intervals, an air outlet gap 60 is formed between the air outlets of two adjacent fans, and a secondary heat exchange region 51 is formed in a region of the heat exchanger 50 corresponding to the air outlet gap 60; by arranging the diffuser 40, the air outlet range of the two centrifugal fans 20 can be expanded to the secondary heat exchange area 51, so that the air outlet of the centrifugal fans 20 can cover all the heat exchanger 50 areas of the heat exchanger 50. The heat exchanger 50 is more efficiently utilized thereby increasing the overall efficiency of the ducted air conditioner.

It should be noted that, as shown in fig. 3, from the air inlet 211 of the centrifugal fan 20 to the air outlet of the centrifugal fan 20, the sidewall 212 of the volute 21 and the outer wall of the diffuser 40 form a two-stage inclined expanding structure, and the outer wall inclination angle β of the diffuser 40 is greater than the inclination angle α of the sidewall 212 of the volute 21. Wherein the range of the inclination angle alpha is more than or equal to 0.5 degrees and less than or equal to 10 degrees, preferably more than or equal to 1 degree and less than or equal to 4 degrees; the inclination angle beta is in the range of 5 DEG to beta to 40 DEG, preferably 10 DEG to beta to 20 deg.

It should be noted that, in the present embodiment, the side wall 212 of the scroll casing 21 is a double side wall 212 as shown in fig. 3, but this is not limitative. In another embodiment shown in fig. 4, the sidewall 212 of the volute 21 may be inclined with a single side, and in general, the volute 21 is inclined with two sides in a double-side air inlet condition; the volute 21 is used for air inlet on one side and adopts single-side inclination.

As shown in fig. 5, the centrifugal fan 20 further includes a motor bracket 70, the motor bracket 70 is disposed in the return air channel 31, in order to reduce the resistance of the air flow, the motor bracket 70 has a hollow structure 71, and when the centrifugal fan 20 admits air, a part of the air flow can enter the air inlet 211 through the hollow structure 71, thereby reducing the air admission resistance.

It should be noted that the hollow structure 71 is an overflowing hole formed in the motor bracket 70, and in order to improve the strength and reliability of the motor bracket 70, a flanging or flanging structure is disposed on the motor bracket 70, and the flanging or flanging structure is located at the position of the overflowing hole.

The centrifugal fan 20 further includes a centrifugal blade 213, the centrifugal blade 213 is disposed in the volute 21, as shown in fig. 6, the blade of the centrifugal blade 213 near the air inlet 211 is disposed in an inclined manner. The blades of the centrifugal fan blade 213 close to the air inlet 211 are arranged in an inclined mode, so that the working area of the centrifugal fan blade 213 is ensured, the inflow area is increased, the inflow resistance and the inflow speed are reduced, the noise is reduced, and the flow is increased.

In order to facilitate the installation and disassembly of the centrifugal fan blade 213 or the motor, as shown in fig. 7, the volute casing 21 is of a split-type detachable structure, the volute casing 21 includes a first part 21a and a second part 21b, and the first part 21a and the second part 21b are detachably connected. The first part 21a and the second part 21b are provided with a buckle and a clamping groove which are matched with each other, so that the volute casing 21 can be conveniently assembled and separated. In some other embodiments not shown in the figures, the volute 21 may be further split into more than two parts.

It is to be understood that the above-described embodiments of the present invention are merely examples provided for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. It is not exhaustive here for all embodiments. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.

Claims

1. A ducted air conditioner comprises a shell (10) and a centrifugal fan (20), wherein the centrifugal fan (20) is arranged in the shell (10), an air return opening (11) is arranged on the shell (10), and the ducted air conditioner is characterized in that,

the centrifugal fan (20) comprises a volute (21), the volute (21) is provided with an air inlet (211), the volute (21) is also provided with a pair of side walls (212) which are arranged oppositely, and the air inlet (211) is positioned on the side walls (212);

an air return channel (31) is formed between the side wall (212) and the inner wall of the shell (10) of the air pipe machine, and the air inlet (211) is communicated with the air return inlet (11) through the air return channel (31);

in the direction from the air inlet (211) of the volute (21) to the air return opening (11) of the shell (10), the flow area of the air return channel (31) is gradually increased.

2. The duct machine of claim 1,

the number of the air inlets (211) is two, and each air inlet (211) is positioned on one side wall (212).

3. The ducted air conditioner of claim 2,

the centrifugal fans (20) are arranged at intervals, a common air duct (32) is formed between the side walls (212) of two adjacent centrifugal fans (20), and the air inlets (211) of the two centrifugal fans (20) are communicated with the air return opening (11) of the shell (10) through the common air duct (32);

and the flow area of the common air duct (32) is gradually increased in the direction from the air inlet (211) of the centrifugal fan (20) to the air return opening (11) of the shell (10).

4. The ducted air machine according to claim 1, wherein the centrifugal fan (20) further comprises:

the diffuser (40) is arranged on the volute (21), the diffuser (40) is provided with a diffuser passage (41), a first end of the diffuser passage (41) is communicated with the interior of the volute (21), and a second end of the diffuser passage (41) forms an air outlet of the centrifugal fan (20);

the flow area of the flow expansion channel (41) is gradually increased from the first end to the second end of the flow expansion channel (41).

5. The ducted air conditioner of claim 4,

the air duct machine further comprises a heat exchanger (50), the heat exchanger (50) is arranged in the shell (10), the centrifugal fan (20) is located between the heat exchanger (50) and the air return opening (11), and the second end of the flow expansion channel (41) faces the heat exchanger (50).

6. The ducted air conditioner of claim 5,

the air outlet range of the air diffuser (40) covers all heat exchange areas of the heat exchanger (50).

7. The ducted air machine according to claim 1, wherein the centrifugal fan (20) further comprises:

the air return device comprises a motor support (70), wherein the motor support (70) is arranged in the air return channel (31), and the motor support (70) is provided with a hollow structure (71).

8. The ducted air conditioner of claim 7,

the hollow structure (71) is an overflowing hole formed in the motor support (70), a flanging or edge folding structure is arranged on the motor support (70), and the flanging or edge folding structure is located at the position of the overflowing hole.

9. The ducted air conditioner of claim 1,

the volute (21) comprises a first portion (21 a) and a second portion (21 b), the first portion (21 a) and the second portion (21 b) being detachably connected.

10. The ducted air conditioner of claim 1,

the centrifugal fan (20) further comprises a centrifugal fan blade (213), the centrifugal fan blade (213) is arranged in the volute (21), and the centrifugal fan blade (213) is close to the blade at the position of the air inlet (211) and is arranged in an inclined mode.