CN109028310A

CN109028310A - Air conditioner

Info

Publication number: CN109028310A
Application number: CN201811019708.6A
Authority: CN
Inventors: 汪先送; 周何杰
Original assignee: Midea Group Co Ltd; Guangdong Midea Refrigeration Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2018-12-18

Abstract

The present invention discloses a kind of air conditioner, wherein air conditioner includes shell and heat exchanger, the shell has air inlet and air outlet, the heat exchanger corresponds to the air inlet setting, the air conditioner further include: axial flow blower component is set between the air outlet and the heat exchanger；The axial flow blower component includes chimney fan, and it is installed in the chimney fan, close to the rear fan blade of the heat exchanger, the diameter of the chimney fan is d0, described in 250mm≤do≤450mm after minimum range between fan blade and the heat exchanger be d1,20mm≤d1≤120mm.Technical solution of the present invention reduces the noise generated when air conditioner operation.

Description

Air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner.

Background

The axial flow fan assembly is internally provided with one axial flow wind wheel or two axial flow wind wheels or more than two axial flow wind wheels, and the air outlet quantity is larger when the axial flow fan provided with two or more than two axial flow wind wheels operates.

An axial flow fan assembly is installed in some existing air conditioners. As the axial flow fan component is operated, the larger noise can not be avoided.

Disclosure of Invention

The invention mainly aims to provide an air conditioner, aiming at solving the problem of high noise of the existing air conditioner.

In order to achieve the above object, the air conditioner provided by the present invention includes a housing and a heat exchanger, wherein the housing has an air inlet and an air outlet, the heat exchanger is disposed corresponding to the air inlet, and the air conditioner further includes:

the axial flow fan assembly is arranged between the air outlet and the heat exchanger; the axial flow fan assembly comprises an air outlet cylinder and a rear fan blade arranged in the air outlet cylinder and close to the heat exchanger, the diameter of the air outlet cylinder is d0, do is larger than or equal to 250mm and smaller than or equal to 450mm, the minimum distance between the rear fan blade and the heat exchanger is d1, and d1 is larger than or equal to 20mm and smaller than or equal to 120 mm.

Preferably, d1 is 60 mm-80 mm.

The air conditioner comprises an air conditioner indoor unit and an air conditioner outdoor unit, the axial flow fan assembly is placed in the air conditioner indoor unit, and the air conditioner indoor unit is a floor type air conditioner indoor unit or a ceiling type air conditioner indoor unit or a wall-mounted type air conditioner indoor unit; or the axial flow fan assembly is placed in the air conditioner outdoor unit.

Preferably, the axial flow fan assembly is a first fan, a second fan is further arranged in the air conditioner, the first fan and the second fan are both arranged in the indoor unit of the air conditioner, and d4 is more than or equal to 30mm and less than or equal to 40 mm; or,

the first fan and the second fan are both arranged in the air conditioner outdoor unit, and d4 is larger than or equal to 30mm and smaller than or equal to 40 mm.

Preferably, the axial flow fan assembly further comprises a front fan blade close to the air outlet, the distance between the front fan blade and the rear fan blade is d2, and d2 is not less than 10mm and not more than 50mm

Preferably, 20mm < d2 < 30 mm.

Preferably, the axial flow fan assembly further comprises a rear motor and a rear support, the rear fan blade is mounted on the rear motor, the rear motor is mounted on the rear support, and the rear support is located on the rear side of the rear fan blade.

Preferably, the minimum distance between the rear support and the rear fan blade is d3, and d3 is more than or equal to 5mm and less than or equal to 30mm

Preferably, 10mm < d3 < 20 mm.

Preferably, the axial flow fan assembly further comprises a front motor, a front fan blade and a front support, wherein the front fan blade is mounted on the front motor, the front motor is mounted on the front support, and the front support is located on the front side of the front fan blade.

Preferably, the minimum distance between the front support and the front fan blade is d4, and d4 is more than or equal to 5mm and less than or equal to 30 mm.

Preferably, 10mm < d4 < 20mm

Preferably, the axial flow fan assembly further comprises an air outlet cylinder and front fan blades close to the air outlet, the front fan blades and the rear fan blades are arranged in the air outlet cylinder, the distance between the front fan blades and/or the rear fan blades and the inner wall of the air outlet cylinder is d5, and d5 is not less than 3mm and not more than 15 mm.

Preferably, d5 is 6 mm-10 mm.

Preferably, the heat exchanger is a straight-line heat exchanger, or a V-shaped heat exchanger, or a C-shaped heat exchanger, or a U-shaped heat exchanger, or a W-shaped heat exchanger.

Preferably, the axial flow fan assembly further comprises a front fan blade close to the air outlet, and the rotation direction of the front fan blade when blowing the airflow to the air outlet is opposite to the rotation direction of the rear fan blade when blowing the airflow to the air outlet.

The technical proposal of the invention limits the diameter d0 of the air outlet cylinder of the axial flow fan component to be in the same range

Do is more than or equal to 250mm and less than or equal to 450mm, and the minimum distance d1 between the rear fan blade and the heat exchanger is limited to d1 which is more than or equal to 20mm and less than or equal to 120mm, so that the noise generated during the operation of the air conditioner is reduced to a great extent.

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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;

FIG. 2 is a front view of the air conditioner of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the air conditioner of FIG. 1 with the front panel removed;

fig. 4 is a sectional view of the air conditioner of fig. 2 taken along the line M-M.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Air conditioner	11	Outer casing
11a	Front panel	11b	Back plate
				110	Air outlet	12	Axial flow fan assembly
120	Air outlet cylinder	121a	Front fan blade
				122a	Front motor	123a	Front support
121b	Rear fan blade	122b	Rear motor
				123b	Rear support	13	Heat exchanger

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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 all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1, the present invention provides an air conditioner 10, which may be a floor type air conditioner, a ceiling type air conditioner, or the like. The following description of the air conditioner 10 will be given with reference to a floor-type air conditioning indoor unit 10 as a specific embodiment.

Referring to fig. 2, 3 and 4, the housing 11 has a front panel 11a and a back panel 11b, the front panel 11a has an air outlet 110, the air outlet 110 is provided with an air outlet frame, the back panel 11b has an air inlet, the air inlet is provided with an air inlet grille, a filter screen is arranged inside the air inlet grille, and the heat exchanger 13 is installed in the housing 11 and located between the air inlet and the air outlet 110. The heat exchanger 13 may be mounted to the back plate 11b or to the side plate, although other mounting methods are not excluded. The axial flow fan assembly 12 is installed at the air outlet 110, when the air conditioner 10 performs a refrigeration function, the axial flow fan assembly 12 operates, negative pressure is formed behind the axial flow fan assembly 12, and outside air passes through the heat exchanger 13 along the air inlet under the action of the negative pressure and is blown to the front of the air conditioner 10 by the axial flow fan assembly 12.

Specifically, the axial flow fan assembly 12 may be a single-stage axial flow fan (only one fan blade), or a multi-stage axial flow fan (a plurality of fan blades, for example, 2 fan blades, 3 fan blades, or even more fan blades are disposed in the air outlet cylinder, and the plurality of fan blades are distributed at intervals along the axial direction of the air outlet cylinder). For the multi-stage axial flow fan, the following embodiments will be specifically described with reference to a cyclone fan as a specific embodiment. For the counter-rotating fan, a front fan blade and a rear fan blade are arranged in the air outlet cylinder, and the rotating direction of the front fan blade when blowing airflow to the air outlet is opposite to the rotating direction of the rear fan blade when blowing airflow to the air outlet. The axial flow fan assembly 12 includes an air outlet duct 120, front blades 121a, a front support 123a, a front motor 122a, rear blades 121b (if there is only one blade in the axial flow fan assembly 12, the named blade is a rear blade), a rear support 123b and a rear motor 122 b. The air outlet barrel 120 is installed at the air outlet 110, and two ends of the air outlet barrel 120 are open. The rear bracket 123b is installed in the air outlet barrel 120 and is arranged close to the air inlet end thereof. The rear motor 122b is mounted to the rear bracket 123 b. The rear fan blade 121b is located in the air outlet cylinder 120 and is installed on the rear motor 122 b. The front bracket 123a is installed in the air outlet barrel 120 and is arranged close to the air outlet end thereof. The front motor 122a is mounted to the front bracket 123 a. The rear fan blade 121b is located in the air outlet cylinder 120 and is installed on the rear motor 122 b.

The heat exchanger 13 may be straight, V-shaped, C-shaped, U-shaped, or W-shaped.

Referring to fig. 1 to 4, the diameter d0, d0 and 450mm of the outlet housing 120 is 250mm and 450mm, such as d0 and 280mm, 300mm, 330mm, 350mm, 380mm, 400mm, 420mm or 440 mm. Of course, d0 e [300mm,400mm ] is preferred here.

The minimum distance between the rear fan blade 121b and the heat exchanger 13 is d1, d1 e [20mm,120mm ], for example, d1 is 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, and the like.

To test the influence of d1 on the noise of the air conditioner 10, taking the diameter of the outlet barrel 120 as 360mm and the air volume at 1200 square as an example, the experiment is as follows:

TABLE 1A

Normally, the larger d1, the lower the noise associated with the air flow of axial fan assembly 12. However, as can be seen from table 1, when d1 is greater than 120mm, the noise variation at the same air volume is not obvious, so that from the noise perspective, d1 is preferably 120mm, but when d1 is too large, the thickness of the whole machine is affected, the manufacturing cost is also increased, and when d1 is greater than 60mm, the noise reduction range at the same air volume is reduced, so in summary, d1 is preferably 60mm to 80 mm.

The above embodiments are directed to a single bipolar axial flow fan (counter-rotating fan).

In addition, through tests, when a single bipolar axial flow fan (a counter-rotating fan, which is named as a first fan) and other fans (named as second fans) are arranged in the air conditioner, such as an axial flow fan, a cross-flow fan or a centrifugal fan, the optimal value of d1 changes. Of course, the first fan and the second fan may be both disposed in the indoor unit of the air conditioner or both disposed in the outdoor unit of the air conditioner.

In order to test the relationship between the noise generated by more than two fans and d1, the experiment is as follows (taking an indoor unit as an example):

TABLE 1B

As can be seen from table 1B, when d1 is 60mm to 80mm, the noise of the air-conditioning indoor unit is relatively high, and conversely, when d1 is 30mm to 40mm, the noise of the air-conditioning indoor unit is at the lowest level, and particularly, when d4 is 30mm, the noise value is at the lowest state.

In addition to the significant effect of d1 on the noise of the axial fan assembly 12, other parameters may also have different effects on the noise of the axial fan assembly 12, for example, the distance between the front blade 121a and the rear blade 121b is d 2.

The minimum distance between the rear bracket 123b and the rear fan blade 121b is d 3.

The minimum distance between the front bracket 123a and the front fan blade 121a is d 4.

The distance between the front fan blade 121a and/or the rear fan blade 121b and the inner wall of the air outlet barrel 120 is d5, and the like.

The above parameters were tested separately in order to reduce the noise of the axial fan assembly 12 to a lower level.

To test the influence of d2 on the noise of the air conditioner 10, taking the diameter of the outlet barrel 120 as 360mm and the air volume at 1200 square as an example, the experiment is as follows:

TABLE 2

It can be seen from table 2 that the smaller d2 is, the larger the air volume of the axial flow fan assembly 12 at the same rotation speed is, and the lower the noise of the fan at the same air volume is, but because the whole machine has assembly error, deformation in the transportation process, and deformation caused by stress during the operation of the fan blades, the distance between the two fan blades should not be too small in order to ensure the reliability of the operation of the fan. Referring to table 2, the noise was lower than 50dB in the range of 10mm to 50mm for d 2. When d2 is in 20mm to 30mm within range, both can satisfy the noise lower, can also effectively prevent to lead to the problem of interference because of the interval is too low between two fan blades.

To test the influence of d3 on the noise of the air conditioner 10, taking the diameter of the outlet barrel 120 as 360mm and the air volume at 1200 square as an example, the experiment is as follows:

TABLE 3

Theoretically, the smaller the d3, the better, but considering the assembly of the rear fan blade 121b, the errors and the deformation in the transportation and operation processes, the d3 should not be too large or too small. Therefore, d3 is preferably between 5mm and 30mm, and the noise level is below 50dB in this interval.

In addition, it can also be seen from table 3 that when d3 rises from 15mm to 20mm, the noise level suddenly drops to a lower level, and then rises again as the rise continues from 20 mm. The reason may be that when d3 is between 5mm and 15mm, partial vortex is generated between two fan blades, so that wind resistance, energy consumption and noise are all increased, and when d3 is between 15mm and 20mm, vortex effect is reduced, so that noise is reduced. As d3 continues to rise, the eddy current effect is intensified, resulting in a higher noise level.

For the minimum distance d4 between the front bracket 123a and the front blade 121a, the situation is similar to that of the rear bracket 123b and the rear blade 121b, namely d4 ∈ [5mm,30mm ], preferably, d4 ∈ [10mm,20mm ].

To test the effect of d5 on the noise of the device 10, the diameter of the outlet barrel 120 is 360mm, and the air volume at 1200 square is taken as an example, and the experiment is as follows:

TABLE 4

For d5, theoretical and testing prove that the smaller d5 is, the larger the air volume of the axial flow fan assembly 12 with the same rotating speed is, and the lower the fan noise with the same air volume is, but in consideration of possible errors or deformation in assembly, transportation and fan operation, in order to avoid interference of the fan blades with the inner wall of the air outlet cylinder 120, the d5 is not suitable to be too large or too small.

Because the manufacturing tolerance of the 360mm air-out cylinder 120 is ± 2mm, when d5 is 2mm, interference between the fan blades and the inner wall of the air-out cylinder 120 is easily caused. In view of this, in the present embodiment, d5 is 3mm or more.

As can be seen from table 4, when d5 is 15mm, the corresponding noise value is 49.8mm, which is very close to 50mm, so d5 is preferably in the range of 3mm to 15 mm.

In addition, as can be seen from Table 4, the noise value rises slowly as d5 increases gradually from 2mm to 10mm, while the noise value increases faster as d5 increases from 8mm to 10mm, based on which 6 mm. ltoreq. d 5. ltoreq.10 mm, mm, preferably 7 mm.

When the air conditioner 10 performs air supply, the rear fan blade 121b rotates in the counterclockwise direction, at this time, under the action of the rear fan blade 121b, the external air passes through the heat exchanger 13 and flows to the front of the rear fan blade 121b, and the airflow has kinetic energy rotating in the counterclockwise direction and kinetic energy in the axial direction of the rear fan blade 121 b. If the rotation direction of the front fan blade 121a is the same as that of the rear fan blade 121b when the front fan blade 121a actively supplies air forward, the airflow guided out by the front fan blade 121a has higher rotation energy, and thus, the air supply distance is shortened.

In view of this, in this embodiment, the rotation direction of the rear fan blade 121b when the air flow is guided from the air inlet end to the air outlet end is opposite to the rotation direction of the front fan blade 121a when the air flow is guided from the air inlet end to the air outlet end. Therefore, when the airflow between the two axial-flow wind wheels flows out from the front wind blades 121a, most of the rotational kinetic energy of the airflow is converted into axial kinetic energy, and thus, the air supply distance is longer.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An air conditioner, includes casing and heat exchanger, the shell has air intake and air outlet, the heat exchanger corresponds the air intake setting, its characterized in that still includes:

2. The air conditioner as claimed in claim 1, wherein d1 is 60mm 80 mm.

3. The air conditioner as claimed in claim 1, wherein the air conditioner comprises an indoor air conditioner unit and an outdoor air conditioner unit, the axial flow fan assembly is placed in the indoor air conditioner unit, and the indoor air conditioner unit is a floor type indoor air conditioner unit, a ceiling type indoor air conditioner unit or a wall-mounted type indoor air conditioner unit; or the axial flow fan assembly is placed in the air conditioner outdoor unit.

4. The air conditioner as claimed in claim 1, wherein the axial flow fan assembly is a first fan, a second fan is further provided in the air conditioner, the first fan and the second fan are both provided in the indoor unit of the air conditioner, and d4 is greater than or equal to 30mm and less than or equal to 40 mm; or,

5. The air conditioner as claimed in claim 1, wherein the axial flow fan assembly further comprises a front fan blade close to the air outlet, a distance between the front fan blade and the rear fan blade is d2, and d2 is not less than 10mm and not more than 50 mm.

6. The air conditioner according to claim 5, wherein 20 mm. ltoreq. d 2. ltoreq.30 mm.

7. The air conditioner according to claim 1, wherein said axial flow fan assembly further comprises a rear motor and a rear bracket, said rear fan blade being mounted to said rear motor, said rear motor being mounted to said rear bracket, said rear bracket being located at a rear side of said rear fan blade.

8. The air conditioner as claimed in claim 7, wherein the minimum distance between the rear bracket and the rear fan blade is d3, and d3 is 5mm or more and 30mm or less.

9. The air conditioner as claimed in claim 8, wherein d3 is 10mm 20 mm.

10. The air conditioner according to claim 1, wherein said axial flow fan assembly further comprises a front motor, a front blade and a front bracket, said front blade is mounted to said front motor, said front motor is mounted to said front bracket, and said front bracket is located at a front side of said front blade.

11. The air conditioner as claimed in claim 10, wherein the minimum distance between the front bracket and the front fan blade is d4, and d4 is 5mm or more and 30mm or less.

12. The air conditioner as claimed in claim 11, wherein d4 is 10mm 20 mm.

13. The air conditioner as claimed in claim 1, wherein the axial flow fan assembly further comprises an air outlet barrel and a front blade close to the air outlet, the front blade and the rear blade are disposed in the air outlet barrel, a distance between the front blade and/or the rear blade and an inner wall of the air outlet barrel is d5, and d5 is not less than 3mm and not more than 15 mm.

14. The air conditioner as claimed in claim 13, wherein d5 is 6mm 10 mm.

15. The air conditioner as claimed in claim 1, wherein the heat exchanger is a straight-line type heat exchanger, or a V-type heat exchanger, or a C-type heat exchanger, or a U-type heat exchanger, or a W-type heat exchanger.

16. The air conditioner of claim 1, wherein the axial fan assembly further comprises a front blade adjacent to the air outlet, wherein a rotational direction of the front blade when blowing the airflow to the air outlet is opposite to a rotational direction of the rear blade when blowing the airflow to the air outlet.