WO2015192493A1

WO2015192493A1 - Indoor air-conditioning unit

Info

Publication number: WO2015192493A1
Application number: PCT/CN2014/086386
Authority: WO
Inventors: 董明珠; 谭建明; 苏玉海; 杜辉; 王成; 雷新建; 岳耀标; 旷文琦; 周伙喜; 陈泽波; 冯汇远; 林伟雪; 赵成龙; 潘亚前; 章迎松
Original assignee: 珠海格力电器股份有限公司
Priority date: 2014-06-17
Filing date: 2014-09-12
Publication date: 2015-12-23
Also published as: CN104061668B; CN104061668A

Abstract

An indoor air-conditioning unit, comprising a shell (1) and a heat exchanger (3) and a cross-flow fan (2) that are disposed in the shell (1). The cross-flow fan (2) comprises a cross-flow wind wheel (22) and a volute that are mutually matched. The volute comprises a top cover (21) and a volute tongue (23). A diffusion portion of the cross-flow fan (2) is formed between the top cover (21) and the volute tongue (23). The diffusion portion is downward and an air outlet is formed in a lower side surface of the shell (1). A rear side surface and/or an upper side surface of the shell (1) is provided with an air return port. An included angle λ of the connection lines of two end points of a molded line of the top cover (21) and the center of the cross-flow wind wheel (22) ranges from 185° to 225°.

Description

Air conditioner indoor unit

Related application

The present application claims priority to Chinese Patent Application No. 2014-1027060, filed on Jun.

Technical field

The invention relates to the field of refrigeration, and in particular to an indoor unit of an air conditioner.

Background technique

With the improvement of people's living standards, people pay more and more attention to the decoration of the room. Due to the concealment of the hidden room air conditioning unit, the hidden room air conditioning unit often adopts a partial ceiling to save the ceiling space. At the same time, the air conditioning unit adopts the side. Back to the air circulation mode, the airflow can easily reach the middle and lower parts of the room. However, the existing hidden room air conditioning unit has a prominent noise problem when the air volume is increased, and it is impossible to control the noise within a reasonable range while further increasing the air volume.

Summary of the invention

In view of the current state of the art, an object of the present invention is to provide an air conditioner indoor unit that reduces noise of an air conditioner indoor unit and improves air output efficiency. In order to achieve the above object, the technical solution of the present invention is as follows:

An air conditioner indoor unit includes a housing, and a heat exchanger and a cross flow fan disposed inside the housing, the cross flow fan including a cross flow wind wheel and a volute disposed in cooperation with each other;

The volute includes a top cover and a volute tongue, and a diffuser portion of the cross flow fan is formed between the top cover and the volute tongue, the pressing portion faces downward and forms on a lower side of the casing Air outlet

a return air inlet on the rear side and/or the upper side of the housing;

An angle λ between the two ends of the profile line of the top cover and the center line of the cross flow wind wheel is 185° to 225°.

In one embodiment, an angle λ between the ends of the profile line of the top cover and the center line of the cross flow wind wheel is 190°-220°.

In one embodiment, the minimum gap δ1 between the edge of the cross-flow wind wheel and the volute tongue is 7 mm to 9 mm, and the minimum gap δ2 between the edge of the cross-flow wind wheel and the top cover is 2 mm. ~14mm.

In one embodiment, the angle between the inner side edge and the outer side edge of the volute tongue toward the end of the cross flow wind wheel and the line connecting the center of the cross flow wind wheel is Ψ, wherein 21° ≤ Ψ ≤43°.

In one embodiment, an angle between the volute tongue and the top cover is flared toward the air outlet side to form a pressure angle γ of the diffuser, wherein 11° ≤ γ ≤ 39°.

In one embodiment, the heat exchanger is a two-fold heat exchanger, and an angle θ1 between the first fold of the heat exchanger and the second fold of the heat exchanger is between 36° and 149° .

In one embodiment, the heat exchanger is a heat exchanger that is more than three fold.

In one embodiment, an angle ω between the line of the closest point of the top cover from the cross-flow wind wheel and the center of the cross-flow wind wheel is between 41° and 119°.

In one embodiment, the vertical distance L of the center of the cross-flow wind wheel to the air outlet on the lower side of the casing is 65 mm to 175 mm.

In one embodiment, the cross-flow fan has an intake angle α of 121° to 249°, and the cross-flow fan has an outlet angle β of 111° to 239°, wherein α+β=360°.

The beneficial effects of the invention are:

The air conditioner indoor unit of the invention has the air outlet opening on the lower side surface, and the air return opening is arranged on the rear side surface and/or the lower side surface to realize partial ceiling of the room, saving a large amount of room ceiling space, and realizing the wind to be delivered to the room. In the middle and lower part (ie, the active area of the person), by optimizing the top cover, the angle between the two ends of the profile line of the top cover and the center line of the cross-flow wind wheel is 185° to 225°, and the structure is lowered. The noise of the air conditioner indoor unit improves the efficiency of the air outlet and the comfort of heating.

DRAWINGS

1 is a perspective view of an embodiment of an air conditioning indoor unit of the present invention;

Figure 2 is a cross-sectional view of the air-conditioning indoor unit shown in Figure 1 along the radial direction of the cross-flow wind wheel;

3 is a schematic view showing the positional relationship between Ψ and θ1 of the air conditioning indoor unit shown in FIG. 2;

4 is a schematic view showing the relationship between δ1, δ2, α, and β of the air conditioner indoor unit shown in FIG. 2;

Figure 5 is a schematic view showing the relationship of ω, γ, L position of the air-conditioning indoor unit shown in Figure 2;

Fig. 6 is a schematic view showing the air circulation of the side-return type of the air-conditioning indoor unit shown in Fig. 1.

detailed description

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the air conditioning indoor unit of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 to 6, an embodiment of an air conditioner indoor unit of the present invention includes a housing 1, and a heat exchanger 3 and a cross flow fan 2 disposed inside the housing 1, and a water receiving tray 4 is disposed at a lower portion of the heat exchanger 3. , cross flow fan 2 includes mutual cooperation The cross-flow wind wheel 22 and the volute, the volute includes a top cover 21 and a volute tongue 23, and a diffuser portion of the cross flow fan 2 is formed between the top cover 21 and the volute tongue 23, the pressing portion facing downward and at The lower side of the casing 1 forms an air outlet; the rear side and/or the upper side of the casing 1 has a return air opening.

The angle λ (the central angle corresponding to the top cover line) formed by the line ends of the top cover 21 and the center line of the cross flow wind wheel 22 is 185° to 225°, as shown in Fig. 2, λ is preferred. 190 ° ~ 220 °.

The angle between the inner side and the outer side of the end portion of the volute 23 facing the cross-flow wind wheel 22 and the line connecting the center of the cross-flow wind wheel 22 is Ψ, as shown in FIG. 3, where 21° ≤ Ψ ≤ 43 °, Ψ is preferably 25° or 35°.

The angle between the volute tongue 23 and the top cover 21 is opened to the wind exit side (opening downward in FIG. 5), forming a pressure angle γ of the diffuser, wherein 11° ≤ γ ≤ 39° γ is preferably any one of 24°, 25° and 26°.

As an embodiment, the angle between the line connecting the closest point of the top cover 21 to the center of the cross flow wind wheel 22 and the center of the cross flow wind wheel 22 is 41° to 119°, as shown in FIG. 5, and ω is preferably 65°. ~95°, ω is best at 85°.

As an embodiment, as shown in FIG. 4, the intake angle α of the cross flow fan 2 is 121° to 249°, and the outlet angle β of the cross flow fan 2 is 111° to 239°, wherein α+β= 360°. The intake angle of the cross flow fan 2 is the shortest distance from the center of the top cover 21 to the center of the cross flow wind wheel 22 to the center of the cross flow wind wheel 22 and the shortest distance from the center of the worm tongue 23 to the center of the cross flow wind wheel 22. The angle connecting the center of the flow wind wheel 22 on the intake side of the cross flow fan; the exit angle of the cross flow fan 2 is: the shortest distance from the center of the top cover to the center of the cross flow wind wheel 22 to the center line of the cross flow wind wheel 22 The angle from the shortest distance from the cross-flow wind wheel on the volute 23 to the center line of the cross-flow wind wheel on the outlet side of the cross-flow fan.

The minimum gap δ1 between the edge of the cross flow wind wheel 22 and the volute tongue 23 is 7 mm to 9 mm, preferably 8 mm. The minimum gap δ2 between the edge of the cross flow wind wheel 22 and the top cover 21 is 2 mm to 14 mm, preferably 7 mm.

As an embodiment, as shown in FIG. 2, the heat exchanger 3 is a two-fold heat exchanger, and the angle θ1 between the first fold of the heat exchanger 3 and the second fold of the heat exchanger 3 is 36°. ～149°, θ1 is preferably 50°. The first fold of the heat exchanger 3 is the first heat exchange portion 3a, and the second heat exchanger 3 is folded into the second heat exchange portion 3b, and the first heat exchange portion 31 and the second heat exchange portion 3b are connected to each other to form a change. In the heat exchanger 3, the angle between the first heat exchange portion 3a and the second heat exchange portion 3b is θ1. Of course, the heat exchanger 3 can also be a heat exchanger with more than three folds, and the angle θ2 between two adjacent folds is 15° to 150°. The schematic diagram of the airflow cycle of the side-to-out type of the air-conditioning indoor unit is shown in Fig. 6, and the direction of the arrow in the figure indicates the wind direction.

As an embodiment, as shown in FIG. 5, the vertical distance L of the center of the cross flow wind wheel 22 to the lower side of the casing 1 is 65 mm to 175 mm, and L is preferably 115 mm and 125 mm. .

Taking an air conditioner with a rated cooling capacity of 3.5kw as the testing machine, the diameter of the cross-flow wind wheel 22 is 108mm, the center angle of the volute tongue 23 is 30°, the diffusing angle γ is 16°, and the cross-flow wind wheel The minimum gap between the edge of 22 and the volute 23 is δ1=6 mm, the minimum gap between the edge of the cross-flow wind wheel 22 and the top cover 21 is δ2=5 mm, and the heat exchanger 3 is used as the evaporator. The total heat exchange U tube number of the two-fold evaporator is 16 heat exchange U tubes. The angle between the two folds of the heat exchanger is 48°, and each fold is at an angle of 24° to the horizontal plane. 330mm*195mm (long* High), by adjusting the central angle λ corresponding to the volute tongue 23, the following experimental data is obtained:

Table 1 The center angle corresponding to the different volutes, the highest air volume and noise data of the unit

It can be seen from Table 1 that the central angle λ corresponding to the volute of the unit has an important influence on the airflow of the cross-flow fan. The volute guides the change of the airflow. The bending length of the volute determines the angle of the airflow and evaporates. The top cover type line guides the airflow into the wind field, and the outlet side cover type line guides the wind direction. Due to the side return type air conditioning airflow form, in order to obtain a better air volume and noise effect, the top cover type line The bending length is constant. According to the experimental data, when the value of λ is 185 to 225 degrees, the unit can obtain a higher air-to-noise ratio and there is no wind instability. The optimum range is when the value of λ is 185 to 225 degrees.

In the air conditioner indoor unit of the above embodiment, the air outlet is disposed on the lower side, and the air return port is disposed on the rear side and/or the lower side to realize a partial ceiling of the room, which saves a large amount of room ceiling space, and can simultaneously deliver the wind to the room. The middle and lower part (ie, the active area of the person), by optimizing the top cover, the angle between the two ends of the profile line of the top cover and the center of the cross-flow wind wheel is 185° to 225°, and the structure is The noise of the air conditioner indoor unit is reduced, the air efficiency and the heating comfort are improved, thereby improving the comfort of the room.

The above described embodiments merely express several embodiments of the present invention, the description of which is more specific and detailed, but does not Therefore, it is understood that the scope of the invention is limited. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

An air conditioner indoor unit includes a casing, and a heat exchanger and a cross flow fan disposed inside the casing, wherein:

The cross flow fan comprises a cross flow wind wheel and a volute arranged in cooperation with each other;

The volute includes a top cover and a volute tongue, and a diffuser portion of the cross flow fan is formed between the top cover and the volute tongue, the pressing portion faces downward and forms on a lower side of the casing Air outlet

a return air inlet on the rear side and/or the upper side of the housing;

An angle λ between the two ends of the profile line of the top cover and the center line of the cross flow wind wheel is 185° to 225°.
The air conditioner indoor unit according to claim 1, wherein:

An angle λ between the two ends of the profile of the top cover and the center line of the cross-flow wind wheel is 190°-220°.
The air conditioning indoor unit according to claim 1 or 2, wherein:

The minimum gap δ1 between the edge of the cross flow wind wheel and the volute tongue is 7 mm to 9 mm, and the minimum gap δ2 between the edge of the cross flow wind wheel and the top cover is 2 mm to 14 mm.
The air conditioning indoor unit according to claim 1 or 2, wherein:

The angle between the inner side and the outer side of the end of the worm tongue toward the cross-flow wind wheel and the line connecting the center of the cross-flow wind wheel is Ψ, where 21° ≤ Ψ ≤ 43°.
The air conditioning indoor unit according to claim 1 or 2, wherein:

An angle between the volute tongue and the top cover is opened toward the air outlet side to form a pressure angle γ of the diffuser portion, wherein 11° ≤ γ ≤ 39°.
The air conditioning indoor unit according to claim 1 or 2, wherein:

The heat exchanger is a two-fold heat exchanger, and an angle θ1 between the first fold of the heat exchanger and the second fold of the heat exchanger is between 36° and 149°.
The air conditioning indoor unit according to claim 1 or 2, wherein:

The heat exchanger is a heat exchanger with more than three folds.
The air conditioning indoor unit according to claim 1 or 2, wherein:

The angle between the line connecting the top point of the top cover from the cross-flow wind wheel and the center of the cross-flow wind wheel and the horizontal line ω is 41° to 119°.
The air conditioning indoor unit according to claim 1 or 2, wherein:

The vertical distance L of the center of the cross-flow wind wheel to the air outlet on the lower side of the casing is 65 mm to 175 mm.
The air conditioning indoor unit according to claim 1 or 2, wherein:

The cross-flow fan has an intake angle α of 121° to 249°, and the cross-flow fan has an outlet angle β of 111° to 239°, wherein α+β=360°.