CN211575275U - Air conditioner indoor unit and air conditioner - Google Patents
Air conditioner indoor unit and air conditioner Download PDFInfo
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- CN211575275U CN211575275U CN202020072950.6U CN202020072950U CN211575275U CN 211575275 U CN211575275 U CN 211575275U CN 202020072950 U CN202020072950 U CN 202020072950U CN 211575275 U CN211575275 U CN 211575275U
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- 238000004378 air conditioning Methods 0.000 abstract description 9
- 230000005284 excitation Effects 0.000 abstract description 5
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Abstract
The utility model provides an indoor unit of air conditioner and air conditioner can effectively weaken the fin sound that the heat exchanger produced when the fan was rotatory, can effectively weaken the rotational noise of fan simultaneously. The air-conditioning indoor unit comprises a box body, a backward centrifugal fan, a heat exchanger and a flow guide component, wherein the heat exchanger is provided with at least one fin area with the minimum center distance with the backward centrifugal fan, the flow guide component is arranged on the inner side surface of the fin area and comprises a base plate part, and the base plate part is in a flat plate shape and covers fins corresponding to the fin area. The utility model discloses machine in air conditioning, water conservancy diversion part not only can weaken the fin sound noise of air conditioner, and its base plate portion is flat-plate-shaped, does not have obvious vortex tongue structure for interval increase between water conservancy diversion part and the fan, thereby can obviously weaken the excitation effect that the fan comes to flow to water conservancy diversion part, thereby reach the purpose that reduces the BPF peak value.
Description
Technical Field
The utility model relates to an air conditioning equipment, concretely relates to can weaken machine and air conditioner in air conditioning of air supply noise.
Background
The centrifugal fan can be divided into a forward centrifugal fan and a backward centrifugal fan, the existing commercial Q2C ceiling fan, four directions, two directions and one direction generally use the backward centrifugal fan as an air supply fan, and the backward centrifugal fan has the advantage that the backward centrifugal fan can easily obtain larger air volume and lower noise at lower rotating speed and in a state without a volute.
However, since the heat exchanger surrounding fan is designed in the series of models, the tangential speed of the airflow passing through the surface of the heat exchanger approaches the maximum value when the fan rotates to the nearest point of the heat exchanger, and the interaction between the airflow and the heat exchanger fins causes the heat exchanger to generate fin sound, namely high-frequency (3000 Hz-5000 Hz) howling sound, also called 'whistle sound'. The fin sound has low energy at high frequency band and low or negligible contribution value relative to noise, but the fin sound causes great trouble to the comfort experience of users and is one of the main sources of air supply noise of the indoor unit of the air conditioner.
With the continuous development of air conditioning technology, the air supply noise of the indoor unit of the air conditioner is directly concerned by consumers, and the market competitiveness of the air conditioner is influenced, so that air conditioning equipment manufacturers continuously put forward technical improvement schemes for this purpose. Products in the industry typically turn the wind direction by adding baffles to eliminate the fin tones, as shown in fig. 1.
However, the design is used to add a volute tongue structure to the fan, and due to the existence of the spoiler similar to the volute tongue, the distance between the fan and the spoiler is small, and the interaction generates very obvious BPF (fan frequency doubling sound/rotation noise), i.e. when the fan blade passes through the tip of the spoiler during rotation, the BPF noise is subjected to a large pressure change, so that a large excitation effect is generated on the vibration of the impeller, noise generated by periodic vibration of the impeller blade is caused, and the rotation noise is also one of the most main noise sources during the operation of the air conditioner.
SUMMERY OF THE UTILITY MODEL
The utility model provides an indoor unit of air conditioner and air conditioner can effectively weaken the fin sound that the heat exchanger produced when the fan was rotatory, can effectively weaken the rotational noise of fan simultaneously.
In order to achieve the above technical effects, the utility model discloses a technical scheme is: an indoor unit of an air conditioner, comprising:
a box body;
the backward centrifugal fan is positioned in the box body and is vertically arranged on a bottom plate of the box body;
a heat exchanger positioned in the box body and vertically mounted on a bottom plate of the box body, the heat exchanger surrounding the backward centrifugal fan along a circumferential direction of the backward centrifugal fan, the heat exchanger having at least one fin region having a minimum distance from a center of the backward centrifugal fan;
a flow guide member provided on an inner side surface of the fin region;
the flow guide component comprises a base plate part, and the base plate part is flat and covers the fins corresponding to the fin area.
The flow guide part also comprises a plurality of strip-shaped flow guide parts protruding towards the side where the backward centrifugal fan is located, the flow guide parts are parallel to each other, the flow guide parts are inclined along the rotation direction of the backward centrifugal fan, and the surfaces of the flow guide parts are in smooth transition.
The acute angle included angle formed between the flow guide part and the bottom plate of the box body is 35-55 degrees.
And a through part positioned between two adjacent flow guide parts is also formed on the substrate part.
The number of the through parts between two adjacent flow guide parts is multiple, and the through parts are sequentially arranged along the direction parallel to the inclined direction of the flow guide parts.
The through part is an inclined hole, and the inclined direction of the through part is parallel to the inclined direction of the flow guide part.
The number of the fin areas is four, and the fin areas are respectively positioned at the front side, the rear side, the left side and the right side of the backward centrifugal fan.
The bottom end of the base plate part is flush with the bottom end of the backward centrifugal fan, the height of the base plate part is 2/3-2 times of the height of the backward centrifugal fan, and the distance between the bottom end of the base plate part and the bottom end of the backward centrifugal fan is 7-40 mm.
The surface of the flow guide part is a smooth concave-convex curved surface.
The utility model also provides an air conditioner, machine in the foretell air conditioning.
Compared with the prior art, the utility model has the advantages of it is following and positive effect:
1. the utility model discloses air-conditioning indoor unit, its heat exchanger have at least one with to the fin region that centrifugal fan's centre-to-centre spacing is minimum backward, and be equipped with the water conservancy diversion part on the regional medial surface of this fin, the base plate portion of water conservancy diversion part is flat-plate and covers the fin that the fin region corresponds, thereby can make the high-speed air current that blows off backward centrifugal fan can not directly blow to the fin that the fin region corresponds, air current direction of motion and speed change in this place, and then eliminate the factor that produces the fin sound, then can reduce or even eliminate the fin sound noise of air conditioner;
2. the base plate part of the flow guide component is in a flat plate shape and has no obvious vortex tongue structure, so that compared with a vortex tongue-shaped spoiler in the prior art, the distance between the flow guide component and the fan is increased, the excitation effect of the incoming flow of the fan on the flow guide component can be obviously weakened, and the aim of reducing the BPF peak value is fulfilled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view of an appearance structure of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic view of the internal structure of the indoor unit of the air conditioner in the embodiment of the present invention after a top plate is omitted;
fig. 3 is a schematic structural view of the relative positions of the heat exchanger and the backward centrifugal fan in the embodiment of the present invention;
FIG. 4 is a top view of FIG. 3;
fig. 5 is a schematic structural view of a heat exchanger in an embodiment of the present invention;
FIG. 6 is a front view of a deflector assembly according to an embodiment of the present invention;
FIG. 7 is a view taken along line A of FIG. 6;
fig. 8 is a schematic structural view of the relative position between the backward centrifugal fan and the flow guide member in the embodiment of the present invention.
Description of the drawings: 100-a box body; 110-a base plate; 120-a top plate; 130-circumferential side plates; 200-backward centrifugal fan; 300-a heat exchanger; 310-fin area; 400-a flow guide member; 410-a substrate portion; 420-a flow guide part; 430-a flow guide channel; 440-a jaw; 450-a through-hole.
Detailed Description
The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "front", "rear", "inside", "outside", and the like indicate the orientation or positional relationship based on the installation state of the indoor unit of the air conditioner.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
The present embodiment proposes an air conditioner, wherein the indoor unit 1 of the air conditioner, referring to fig. 1 and fig. 2, specifically includes a box 100, a backward centrifugal fan 200, a heat exchanger 300 and a flow guiding member 400, the box 100 is surrounded by a top plate 120, a bottom plate 110 and peripheral side plates 130, the backward centrifugal fan 200 is located in the box 100 and vertically mounted on the bottom plate 110 of the box 100, the heat exchanger 300 surrounds the backward centrifugal fan 200 along the circumferential direction of the backward centrifugal fan 200, and the heat exchanger 300 has at least one fin region 310 with the minimum distance from the center of the backward centrifugal fan 200; the flow guide member 400 is provided on the inner side of the fin region 310; the air guide member 400 includes a base plate portion 410, and the base plate portion 410 has a flat plate shape and covers the fins corresponding to the fin region 310.
The heat exchanger 300 described herein surrounds the backward centrifugal fan 200 in the circumferential direction of the backward centrifugal fan 200, and may be a partial surrounding or a complete surrounding, and the heat exchanger may be a U-shaped heat exchanger, a zigzag heat exchanger or a parallel straight plate heat exchanger. In the present embodiment, taking a U-shaped heat exchanger as an example, referring to fig. 3 to 5 in combination with fig. 1 and 2, the heat exchanger 300 has four fin regions 310 closest to the center of the backward centrifugal fan 200, which are respectively located at the front, rear, left, and right sides of the backward centrifugal fan 200. As described in the prior art, the fin area 310 is closest to the backward centrifugal fan 200, the tangential speed of the airflow passing through the inner side surface of the heat exchanger 300 of the backward centrifugal fan 200 is close to the maximum value, the interaction between the airflow and the fins of the heat exchanger in the partial area causes the heat exchanger 300 to generate a fin sound of a "whistle", and in order to reduce the fin noise of the indoor unit of the air conditioner, in this embodiment, the inner side surface of the fin area 310 is provided with the flow guide member 400, and referring to fig. 6 and 7, the flow guide member 400 includes a flat base plate portion 410, and the base plate portion 410 covers the fins corresponding to the fin area 310, so that the high-speed airflow blown out from the backward centrifugal fan 200 cannot directly blow onto the fins corresponding to the fin area 310, the moving direction and speed of the airflow are changed at the position, and further the factors generating; meanwhile, the base plate portion 410 is flat plate-shaped, and there is no obvious vortex tongue structure, so that the air-conditioning indoor units of the same model and the same specification and size adopt the flow guide member 400 of the flat plate-shaped base plate portion 410, compared with the vortex tongue-shaped spoiler in the prior art, the distance between the flow guide member 400 and the backward centrifugal fan 200 is increased, thereby the excitation effect of the incoming fan flow on the flow guide member 400 can be obviously weakened, and the aim of reducing the BPF peak value is achieved.
For the installation of the guide member 400, specifically, the claw 440 is arranged on the back surface thereof, that is, the surface of the side thereof away from the backward centrifugal fan 200, and the guide member 400 is clamped on the heat exchange tube of the heat exchanger 300 by the claw 440 in an elastic deformation manner, so that the installation is simple and convenient, and the production efficiency is greatly improved. The latch 440 may be provided at least one at each of the top and bottom of the guide member 400 to improve the installation reliability of the guide member 400.
Further, as shown in fig. 5 to 7, the flow guide member 400 further includes a plurality of strip-shaped flow guide portions 420 protruding toward the side where the backward centrifugal fan 200 is located, the flow guide portions 420 are parallel to each other, the flow guide portions 420 are inclined in the rotation direction of the backward centrifugal fan 200, and the surfaces of the flow guide portions 420 are smoothly transited. On one hand, the flow guiding parts 420 can play a role in enhancing the strength of the flow guiding component 400, on the other hand, the flow guiding parts 420 are inclined along the rotating direction of the backward centrifugal fan 200, a flow guiding channel 430 inclined along the rotating direction of the backward centrifugal fan 200 is formed between the adjacent flow guiding parts 420, when high-speed airflow blown out from the backward centrifugal fan 200 is blown onto the flow guiding component 400, the airflow is guided by the flow guiding channel 430 to flow through the flow guiding component 400, so that the airflow can change direction regularly when flowing through the flow guiding component 400, and the blocking effect of the flow guiding component 400 on the high-speed airflow blown out from the backward centrifugal fan 200 is reduced.
Meanwhile, the smooth surface transition of the flow guiding part 420 can avoid the existence of the tip part, and further avoid the vibration excitation effect on the flow guiding part 400 caused by the large pressure change generated when the blades of the backward centrifugal fan 200 pass through the tip part during rotation, thereby further reducing the BPF noise. Specifically, the surface of the flow guide part 420 may be a smooth arc surface, or may be a curved surface with different concave and convex portions, which is not limited herein.
In this embodiment, an acute angle α formed between the flow guiding portion 420 and the bottom plate 110 of the box 100, that is, an acute angle α formed between the flow guiding portion and the horizontal plane, is as shown in fig. 6, and the angle value is preferably 35 ° to 55 °, and the value of α is too large, so that the flow guiding portion 420 has a large blocking effect on the fan airflow, the value of α is too small, the difference from the incoming flow direction of the fan is too large, and the flow guiding effect is poor, and the value of α is preferably 35 ° to 55 ° as measured by experiments.
Although the flow guide member 400 is added to eliminate the whistling sound well, the heat exchange effect of the heat exchanger 300 is affected to a certain extent because the flow guide member needs to cover the fins covering the fin area 310, and in order to compensate for the effect, the base plate 410 is further provided with a through portion 450, such as a through hole, a through notch and the like, located between two adjacent flow guide portions 420, so that part of the airflow can be allowed to blow through the base plate 410 to reach the heat exchanger 300, and the influence on the heat exchange effect of the heat exchanger 300 is reduced as much as possible.
Further, the size of each through part 450 should be as small as possible so as not to make the air guide member 400 lose the function of eliminating the fin noise, and in order to achieve both the elimination of the fin noise by the air guide member 400 and the reduction of the influence on the heat exchange effect of the heat exchanger 300, it is preferable that the number of the through parts 450 between the adjacent two air guide parts 420 is plural, the size of each through part 450 may be small, and the plural through parts 450 are sequentially arranged in the direction parallel to the inclined direction of the air guide parts 420, so that the space between the adjacent two air guide parts 420 is processed and sufficiently utilized.
Further preferably, the through portion 450 is an inclined hole, and an inclined direction thereof is parallel to an inclined direction of the flow guide portion 420.
Referring to fig. 8, in the present embodiment, the bottom end of the base plate portion 410 is flush with the bottom end of the backward centrifugal fan 200, the height H of the base plate portion 410 is 2/3-2 times the height H of the backward centrifugal fan 200, and the distance L between the bottom end of the base plate portion 410 and the bottom end of the backward centrifugal fan 200 is 7-40 mm. The specific size of the base plate 410 and the specific inclination angle of the air guide part 420 are determined according to CFD simulation analysis by combining the specific model, the distance between the backward centrifugal fan 200 and the heat exchanger 300, the rotation speed of the backward centrifugal fan 200, the wind field distribution in the indoor unit, and other factors.
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 it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. An indoor unit of an air conditioner, comprising:
a box body;
the backward centrifugal fan is positioned in the box body and is vertically arranged on a bottom plate of the box body;
a heat exchanger positioned in the box body and vertically mounted on a bottom plate of the box body, the heat exchanger surrounding the backward centrifugal fan along a circumferential direction of the backward centrifugal fan, the heat exchanger having at least one fin region having a minimum distance from a center of the backward centrifugal fan;
a flow guide member provided on an inner side surface of the fin region;
it is characterized in that the preparation method is characterized in that,
the flow guide component comprises a base plate part, and the base plate part is flat and covers the fins corresponding to the fin area.
2. An indoor unit of an air conditioner according to claim 1,
the flow guide part also comprises a plurality of strip-shaped flow guide parts protruding towards the side where the backward centrifugal fan is located, the flow guide parts are parallel to each other, the flow guide parts are inclined along the rotation direction of the backward centrifugal fan, and the surfaces of the flow guide parts are in smooth transition.
3. An indoor unit of an air conditioner according to claim 1,
the acute angle included angle formed between the flow guide part and the bottom plate of the box body is 35-55 degrees.
4. An indoor unit of an air conditioner according to claim 1,
and a through part positioned between two adjacent flow guide parts is also formed on the substrate part.
5. An indoor unit of an air conditioner according to claim 4,
the number of the through parts between two adjacent flow guide parts is multiple, and the through parts are sequentially arranged along the direction parallel to the inclined direction of the flow guide parts.
6. An indoor unit of an air conditioner according to claim 5,
the through part is an inclined hole, and the inclined direction of the through part is parallel to the inclined direction of the flow guide part.
7. An indoor unit of an air conditioner according to any one of claims 1 to 6,
the number of the fin areas is four, and the fin areas are respectively positioned at the front side, the rear side, the left side and the right side of the backward centrifugal fan.
8. An indoor unit of an air conditioner according to claim 6,
the bottom end of the base plate part is flush with the bottom end of the backward centrifugal fan, the height of the base plate part is 2/3-2 times of the height of the backward centrifugal fan, and the distance between the bottom end of the base plate part and the bottom end of the backward centrifugal fan is 7-40 mm.
9. An indoor unit of an air conditioner according to claim 2,
the surface of the flow guide part is a smooth concave-convex curved surface.
10. An air conditioner, characterized in that: an indoor unit of an air conditioner comprising any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020072950.6U CN211575275U (en) | 2020-01-14 | 2020-01-14 | Air conditioner indoor unit and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020072950.6U CN211575275U (en) | 2020-01-14 | 2020-01-14 | Air conditioner indoor unit and air conditioner |
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| CN211575275U true CN211575275U (en) | 2020-09-25 |
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| CN202020072950.6U Active CN211575275U (en) | 2020-01-14 | 2020-01-14 | Air conditioner indoor unit and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115342441A (en) * | 2022-08-19 | 2022-11-15 | 青岛海信日立空调系统有限公司 | Air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115342441A (en) * | 2022-08-19 | 2022-11-15 | 青岛海信日立空调系统有限公司 | Air conditioner |
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Address after: No.1 Haixin Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province Patentee after: Hisense Air Conditioning Co.,Ltd. Country or region after: China Address before: No. 151, Zhuzhou Road, Laoshan District, Qingdao, Shandong Patentee before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. Country or region before: China |