JP2002250535A - Air conditioning indoor unit, and air conditioner equipped with the air conditioning indoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning indoor unit and an air conditioner equipped with the former air conditioning indoor unit wherein it can reduce pressure variations caused by a blade of an air fan passing therethrough and an NZ sound can be reduced by reducing a pressure difference produced in a space extending between a fan stabilizer and the air fan. SOLUTION: The title air conditioner is characterized in that there is provided pressure equalizing means 100 on a fan stabilizer 118 of an air conditioning indoor unit for communicating a space on the side of an indoor heat exchanger in the fan stabilizer 118 and a space on the side of a cross flow fan while penetrating the fan stabilizer 118 in the direction of a plate thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit for air conditioning and an air conditioner provided with the indoor unit for air conditioning, and more particularly to a fan stabilizer in the indoor unit for air conditioning.

[0002]

2. Description of the Related Art FIG. 7 is a sectional view of an indoor unit 10 for air conditioning. The indoor unit 10 for air conditioning generally has suction grills (suction ports) 11, 1 for taking in indoor air.
2 and an indoor heat exchanger 1 for cooling or heating indoor air taken in from the suction grills 11 and 12.
3, 14, 15 and the indoor heat exchangers 13, 14, 15
An outlet 16 for returning the air heat exchanged in the room to the room,
While taking in air from the suction grills 11 and 12,
A cross flow fan (fan) 17 for blowing out the heat-exchanged air from the outlet 16 into the room, and between the indoor heat exchanger 13 and the cross flow fan 17, the indoor heat exchanger 13 and the cross flow fan 17 and a plate-shaped fan stabilizer 18 extending in parallel with each other as main components.

The fan stabilizer 18 extends from a drain pan 19 located at a lower front part of the air conditioning indoor unit 10 toward the cross flow fan 17. That is, the fan stabilizer 18 is a member that extends obliquely upward to the right from the drain pan 19 in FIG.

[0004] The fan stabilizer 18 has a bent portion 2
At 0, it is bent obliquely upward to the left at an angle of about 90 °. The bent portion 20 is chamfered (R is rounded). Further, an inclined surface is formed on the side of the cross flow fan 17 from the bent portion 20 to the distal end portion 21.

With this configuration, the cross flow fan 17
Is rotated, the air taken in from the intake grills 11, 12 shown in FIG.
The heat is then exchanged, and then blown into the room from the outlet 16. At this time, a pressure distribution as shown in FIG. 8 is formed in the indoor unit 10 for air conditioning.

That is, the highest pressure (30 Pa in FIG. 8) is generated near the bent portion 20 located at the rising portion (root portion) of the fan stabilizer 18.
In addition, the lowest pressure in the vicinity of the fan 17 facing the distal end portion 21 of the fan stabilizer 18 (−5 in FIG. 8).
0 Pa) has occurred.

[0007]

By the way, in the above-mentioned conventional air-conditioning indoor unit, the highest pressure and the lowest pressure are generated in the space on the side of the fan of the fan stabilizer as described above. Therefore, when the blades of the fan pass through a space having such a large pressure difference, a large pressure fluctuation occurs, which causes a problem that a large NZ (noise) sound is generated.

The present invention has been made in view of the above circumstances, and reduces a pressure difference generated in a space between a fan stabilizer and a fan, thereby reducing pressure fluctuation caused by passage of a fan blade. With NZ
It is an object of the present invention to provide an air conditioning indoor unit capable of reducing noise and an air conditioner including the air conditioning indoor unit.

[0009]

Means for Solving the Problems In order to solve the above problems, the following means are adopted in the air conditioning indoor unit and the air conditioner provided with the air conditioning indoor unit according to the present invention. That is, according to the indoor unit for air conditioning according to the first aspect, a suction port for taking in indoor air, an indoor heat exchanger for cooling or heating the air taken in from the suction port, and the indoor heat exchanger An outlet for returning the air heat exchanged by the exchanger to the room, a fan for taking in air from the suction port and blowing out the heat exchanged air from the air outlet into the room, and An indoor unit for air-conditioning comprising, between a fan and the fan, a plate-shaped fan stabilizer extending in parallel with the indoor heat exchanger and the fan, wherein the fan stabilizer is provided with the fan stabilizer in a plate thickness direction. And a pressure equalizing means for penetrating the fan stabilizer and connecting the space on the side of the indoor heat exchanger with the space on the side of the fan. The features. In this air conditioning indoor unit, the space on the indoor heat exchanger side and the space on the fan side of the fan stabilizer are communicated. That is, the high pressure generated in the space on the fan side is guided to the space on the indoor heat exchanger side where the pressure is low, and the pressure difference in the space on the fan side is reduced.

According to the air conditioning indoor unit of the second aspect, in the air conditioning indoor unit of the first aspect, a plurality of the pressure equalizing means are provided along a longitudinal direction of the fan stabilizer. It is characterized by the following. In this air-conditioning indoor unit, since a plurality of pressure equalizing means for communicating the space on the indoor heat exchanger side and the space on the fan side in the fan stabilizer are provided along the longitudinal direction of the fan stabilizer, the fan High pressure generated in the fan-side space over the entire length of the stabilizer is guided to the low-pressure indoor heat exchanger-side space, and the pressure difference in the fan-side space is reduced over the entire length of the fan stabilizer. Will be done.

According to a third aspect of the present invention, in the air conditioning indoor unit according to the second aspect, each of the pressure equalizing means has a circular shape in plan view. In this air-conditioning indoor unit, since the shape of the pressure equalizing means in plan view is each circular, it can be manufactured easily and at low cost using a drill or the like.

According to a fourth aspect of the present invention, in the air conditioning indoor unit according to the second aspect, each of the pressure equalizing means has a rectangular shape in plan view. In this air-conditioning indoor unit, since the planarizing shape of the pressure equalizing means is formed in a rectangular shape, the pressure equalizing means is equalized over a wide area with a small number in the longitudinal direction of the fan stabilizer or in a direction orthogonal to the longitudinal direction. Means will be formed. That is, in the longitudinal direction of the fan stabilizer or in a direction orthogonal to the longitudinal direction, the high pressure generated in the space on the fan side is guided substantially uniformly to the space on the indoor heat exchanger side where the pressure is low.

According to the indoor unit for air conditioning according to the fifth aspect, in the indoor unit for air conditioning according to the second aspect, the pressure equalizing means is cut into a predetermined distance from a tip end of the fan stabilizer to form a comb. It is characterized by being formed. In this air conditioning indoor unit, the pressure equalizing means is cut in a direction perpendicular to the longitudinal direction of the fan stabilizer from the tip end position of the fan stabilizer. That is, the pressure equalizing means is formed over a wide area in the direction orthogonal to the longitudinal direction of the fan stabilizer. Therefore, in the direction orthogonal to the longitudinal direction of the fan stabilizer, the high pressure generated in the space on the fan side is substantially uniformly led to the space on the indoor heat exchanger side where the pressure is low.

According to the indoor unit for air conditioning according to the sixth aspect, in the indoor unit for air conditioning according to the first aspect, the pressure equalizing means has at least one horizontally elongated hole shape in the longitudinal direction of the fan stabilizer. It is characterized by being provided in. In this air conditioning indoor unit, since the pressure equalizing means is provided in the shape of at least one horizontally long hole over the longitudinal direction of the fan stabilizer, the space on the indoor heat exchanger side in the fan stabilizer over the longitudinal direction of the stabilizer. And the space on the fan side are communicated. That is, the high pressure generated in the space on the fan side over the entire longitudinal direction of the fan stabilizer is guided substantially uniformly to the space on the indoor heat exchanger side where the pressure is low.

According to a seventh aspect of the present invention, in the air conditioning indoor unit according to the third aspect, the diameter of the circle is 0.5 mm to 1.0 mm. In this air-conditioning indoor unit, since the pressure equalizing means is formed in a circular shape having a diameter of 0.5 mm to 1.0 mm, it can be manufactured easily and at low cost by using a drill or the like.

According to the air-conditioning indoor unit according to the eighth aspect, in the air-conditioning indoor unit according to any one of the first to seventh aspects, the space on the side of the indoor heat exchanger in the fan stabilizer includes: A sound absorbing material is provided adjacent to the pressure equalizing means. In this air conditioning indoor unit, the sound absorbing material is provided adjacent to the pressure equalizing means in the space on the indoor heat exchanger side of the fan stabilizer, so that the vibration energy passing through the pressure equalizing means further reduces the sound absorbing material. You will pass.

According to the air conditioner of the ninth aspect, the indoor unit for air conditioning according to any one of the first to eighth aspects, a compressor for compressing the refrigerant, and the refrigerant and the outdoor air. Air-conditioning outdoor unit having an outdoor heat exchanger for performing heat exchange with the air-conditioning indoor unit and the air-conditioning outdoor unit, and connecting the refrigerant between the air-conditioning indoor unit and the air-conditioning outdoor unit. And a refrigerant pipe for circulation. In this air conditioner, the space on the indoor heat exchanger side and the space on the fan side of the fan stabilizer of the indoor unit for air conditioning communicate with each other. That is, the high pressure generated in the space on the fan side is guided to the space on the indoor heat exchanger side where the pressure is low, and the pressure difference in the space on the fan side is reduced.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. Note that the outline of the air conditioning indoor unit 10 is the same as that of the conventional unit described with reference to FIG. Therefore, only the features of the present invention will be described here. Further, the same members as those in the related art are denoted by the same reference numerals.

FIG. 1 is an overall perspective view of the fan stabilizer 118, and FIG. 2 is a side sectional view of FIG. As shown in FIG. 2, the fan stabilizer 118 penetrates the fan stabilizer 118 in the plate thickness direction and has a space on the side of the indoor heat exchanger 13 and a space on the side of the cross flow fan (fan) 17 in the fan stabilizer 118. And a communication hole (pressure equalizing means) 100 for communicating the pressure and the pressure.

As shown in FIG. 1, a plurality of communication holes 100 are provided in two rows along the longitudinal direction of the fan stabilizer 118 and in a staggered manner. As shown in FIG. 2, these communication holes 100 are desirably provided in the vicinity of the bent portion 20, that is, at the position where the highest pressure is generated.

Each of the communication holes 100 has a circular shape in plan view. The diameter of the circle is preferably 0.5 mm to 1.0 mm.

With this configuration, the space on the side of the indoor heat exchanger in the fan stabilizer and the space on the side of the fan communicate with each other, and the high pressure generated in the bent portion 19 of the fan stabilizer 18 shown in FIG. Fan stabilizer 18
Can be led to the low-pressure side space.

That is, the high pressure generated in the space on the cross flow fan 17 side of the fan stabilizer 118 causes
The pressure is guided to the space on the side of the indoor heat exchanger 13 where the pressure is low, and the pressure difference in the space on the side of the cross flow fan 17 is reduced. Therefore, the pressure fluctuation generated when the blades of the cross flow fan 17 pass can be suppressed low, and N
The Z sound can be reduced.

As shown in FIG. 3, a communication hole 10 is provided in the fan stabilizer 118 on the side of the indoor heat exchanger.
The sound absorbing material 101 can be provided adjacent to the zero. Thus, the vibration energy passing through the communication hole 100 can be positively attenuated, and the NZ sound can be more effectively reduced.

Further, the pressure equalizing means is provided with the communication hole 10 described above.
It is not limited to 0, but may be a rectangle, that is, a slot 200, as shown in FIG. Thereby, the longitudinal direction of the fan stabilizer 218,
Alternatively, in a direction orthogonal to the longitudinal direction, high pressure generated on the side of the cross flow fan 17 can be guided substantially uniformly to the indoor heat exchanger 13 having a low pressure, and NZ noise can be reduced substantially uniformly. Can be done.

Further, as shown in FIG. 5, the pressure equalizing means may be in the form of a comb, that is, a slit 300 cut from the tip 318a of the fan stabilizer 318 by a predetermined distance. As a result, the bent portion 3 is extended from the tip 318a.
In the vicinity of 20, the high pressure generated on the side of the cross flow fan 17 can be guided substantially uniformly to the indoor heat exchanger 13 having a low pressure, and the NZ noise can be reduced substantially uniformly.

Further, as shown in FIG. 6, the pressure equalizing means has at least one slot shape, that is, the oblong hole 4 over the longitudinal direction of the fan stabilizer 418.
00 can also be set. As a result, in the longitudinal direction of the fan stabilizer 418, the cross flow fan 17
The high pressure generated on the side of the indoor heat exchanger 1
3 can be guided substantially uniformly, and the NZ sound can be reduced substantially uniformly.

As described above, these slots 200,
The slot 300, the slit 300, and the oblong hole 40 are also provided on the side of the indoor heat exchanger 13 in the fan stabilizer 118.
The sound absorbing material 101 can be provided adjacent to the zero. Thereby, the vibration energy passing through the slot 200, the slit 300, and the horizontally long hole 400 can be positively attenuated, and the NZ sound can be more effectively reduced.

[0029]

According to the air conditioning indoor unit and the air conditioner provided with the air conditioning indoor unit of the present invention, the following effects can be obtained. That is, the high pressure generated in the space on the cross-flow fan side is led to the space on the indoor heat exchanger side with a low pressure, so that the pressure difference generated in the space on the cross-flow fan side on the indoor heat exchanger side is high. Can be reduced, and the NZ sound generated when the blades of the cross flow fan pass can be greatly reduced.

A plurality of pressure equalizing means for communicating the space on the indoor heat exchanger side and the space on the cross flow fan side in the fan stabilizer are provided along the longitudinal direction of the fan stabilizer. The high pressure generated in the space on the cross flow fan side over the entire longitudinal direction is led to the space on the indoor heat exchanger side where the pressure is low, and the pressure difference of the space on the cross flow fan side over the entire longitudinal direction of the fan stabilizer. Therefore, it is possible to significantly reduce the NZ noise generated when the blades of the cross flow fan pass.

Further, since the pressure equalizing means is formed in a circular shape in a plan view, it can be easily manufactured by a drill or the like and the manufacturing cost can be reduced.

Furthermore, since the planarizing shapes of the pressure equalizing means are each formed in a rectangular shape, the pressure equalizing means can be formed over a wide area with a small number in the longitudinal direction of the fan stabilizer or in the direction orthogonal to the longitudinal direction. Will be formed. Therefore, in the longitudinal direction of the fan stabilizer or in a direction perpendicular to the longitudinal direction, the high pressure generated in the space on the cross flow fan side is guided substantially uniformly to the space on the indoor heat exchanger side where the pressure is low, and Since the pressure difference in the space on the flow fan side can be reduced, it is possible to significantly reduce the NZ noise generated when the blades of the cross flow fan pass.

Furthermore, the pressure equalizing means is cut in a direction perpendicular to the longitudinal direction of the fan stabilizer from the tip position of the fan stabilizer. Therefore, the high pressure generated in the space on the cross flow fan side in the direction orthogonal to the longitudinal direction of the fan stabilizer is guided almost uniformly to the low pressure indoor heat exchanger side space,
Since the pressure difference in the space on the side of the cross flow fan can be reduced, the effect that the NZ sound generated when the blades of the cross flow fan pass can be greatly reduced can be obtained.

Furthermore, since the pressure equalizing means is provided in the shape of at least one oblong hole in the longitudinal direction of the fan stabilizer, a high pressure generated in the space on the cross flow fan side in the longitudinal direction of the stabilizer is obtained. In addition to being guided to the space on the side of the indoor heat exchanger with low pressure and reducing the pressure difference in the space on the cross flow fan side, the NZ noise generated when the cross flow fan blades pass is greatly reduced. The effect that it can be made to play is produced.

Further, the pressure equalizing means has a diameter of 0.5 mm or less.
Since it is formed in a circular shape of 1.0 mm, there is an effect that these equalizing means can be easily and easily manufactured by a drill or the like.

Further, a sound absorbing material is provided adjacent to the pressure equalizing means on the side of the indoor heat exchanger in the fan stabilizer, and the vibration energy passing through the pressure equalizing means can be further attenuated by the sound absorbing material. Therefore, it is possible to reduce the NZ sound more efficiently.

Further, the air conditioner according to the present invention comprises:
Since the fan stabilizer has a uniformizing means for communicating the space on the side of the indoor heat exchanger and the space on the side of the fan, the high pressure generated in the space on the side of the cross flow fan reduces the indoor heat exchanger having a low pressure. Since it is guided to the space on the side, the pressure difference generated in the space on the side of the indoor heat exchanger in the cross flow fan can be reduced, and the NZ sound generated when the blades of the cross flow fan pass is greatly reduced. This has the effect of being able to be reduced.

[Brief description of the drawings]

FIG. 1 shows an embodiment according to the present invention,
It is a whole perspective view of a fan stabilizer.

FIG. 2 is a side sectional view of the fan stabilizer shown in FIG. 1;

FIG. 3 is a diagram showing a state where a sound absorbing material is attached to an indoor heat exchanger side of the fan stabilizer shown in FIG. 2;

FIG. 4 is a view showing another embodiment according to the present invention, and is an overall perspective view of a fan stabilizer.

FIG. 5 is a view showing another embodiment according to the present invention, and is an overall perspective view of a fan stabilizer.

FIG. 6 is a view showing still another embodiment according to the present invention, and is an overall perspective view of a fan stabilizer.

FIG. 7 is a side sectional view of a conventional air conditioning indoor unit.

8 is a distribution diagram of pressure generated around a fan stabilizer and a cross flow fan of the indoor unit for air conditioning in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Suction grill (suction port) 12 Suction grill (suction port) 13 Indoor heat exchanger 16 Blow-out port 17 Cross flow fan (fan) 18 Fan stabilizer 100 Communication hole (equalizing means) 101 Sound absorbing material 118 Fan stabilizer 200 slot ( Equalizing means) 218 Fan stabilizer 300 Slit (Equalizing means) 318 Fan stabilizer 400 Horizontal oblong hole (Equalizing means) 418 Fan stabilizer

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F24F 5/00 F24F 5/00 N (72) Inventor Satoshi Watanabe 1 Ichimichi, Iwazuka-cho, Nakamura-ku, Nagoya-shi, Aichi, Mitsubishi Nagoya Research Laboratories of Heavy Industries, Ltd. (72) Inventor Kazuhiro Suzuki 3-1-1 Asahicho, Nishi-Biwajima-cho, Nishi-Kasugai-gun, Aichi Prefecture F-term (Ref.) 3H031 AA03 BA33 3H034 AA02 AA18 BB02 BB09 CC03 DD04 DD28 EE06 EE08 3H035 DD04 DD05 3L049 BB04 BB08 BB09 BB11 BC01 BD02 3L054 BC05

Claims (9)

[Claims] 1. An air inlet for taking in indoor air, an indoor heat exchanger for cooling or heating the air taken in from the air inlet, and an air heat exchanged by the indoor heat exchanger in the room. A fan for returning air to the room, and a fan for taking in air from the suction port and blowing out the air that has been heat-exchanged into the room from the air outlet, between the indoor heat exchanger and the fan, An indoor unit for air-conditioning comprising: an indoor heat exchanger and a plate-shaped fan stabilizer extending in parallel with a fan, wherein the fan stabilizer is formed by penetrating the fan stabilizer in a plate thickness direction. An air-conditioning indoor unit, further comprising pressure equalizing means for communicating a space on the heat exchanger side with a space on the fan side. 2. The air conditioning indoor unit according to claim 1, wherein a plurality of the pressure equalizing means are provided along a longitudinal direction of the fan stabilizer. 3. The air conditioning indoor unit according to claim 2, wherein each of the pressure equalizing means has a circular shape in plan view. 4. The air conditioning indoor unit according to claim 2, wherein each of the pressure equalizing means has a rectangular shape in a plan view. 5. The air conditioning indoor unit according to claim 2, wherein the pressure equalizing means is cut into a predetermined distance from a tip of the fan stabilizer and formed in a comb shape. Indoor unit. 6. The air conditioning indoor unit according to claim 1, wherein the pressure equalizing means is provided in a shape of at least one horizontally long hole over a longitudinal direction of the fan stabilizer. For indoor unit. 7. The air conditioning indoor unit according to claim 3, wherein the diameter of the circle is 0.5 mm to 1.0 mm. 8. The indoor unit for air conditioning according to claim 1, wherein a sound absorbing material is provided on the side of the indoor heat exchanger of the fan stabilizer adjacent to the pressure equalizing means. An indoor unit for air conditioning, which is provided. 9. An indoor unit for air conditioning according to claim 1, a compressor for compressing a refrigerant, and outdoor heat for causing heat exchange between the refrigerant and outdoor air. An air conditioning outdoor unit having an exchanger, and a refrigerant pipe for connecting the air conditioning indoor unit and the air conditioning outdoor unit and circulating a refrigerant between the air conditioning indoor unit and the air conditioning outdoor unit. An air conditioner characterized by comprising: