JPH071093B2 - Air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air conditioner.

2. Description of the Related Art Conventionally, in an air conditioner having a cross flow fan, various measures have been taken to improve the air volume and noise performance.

An example of the above-described conventional air conditioner will be described below with reference to the drawings.

5 and 6 show a structure of a ventilation circuit of an air conditioner having a conventional cross flow fan. As shown in the figure, a cross flow fan impeller 1 composed of a plurality of blades 5 and a support plate 5a for supporting the respective blades is centered around a stabilizer 2 and a rear guider 3, and a stabilizer 2 and a rear guider 3 are provided. The air outlet 4 was formed with the rear guide 3 to form a cross flow blower. As shown by the arrow in Fig. 5, the cross-flow fan has a structure in which the inflow direction and the outflow direction of air are opposite to each other, or when the blower is extended in the axial direction, it is proportional to the proportion of its length. It has been widely used in recent years because it has features not found in other blowers, such as an increase in air volume.

By the way, in this type of air conditioner, it is known that the gap S between the cross flow fan 1 and the stabilizer 2 occupies a large specific weight in the air volume and noise characteristics. A method of narrowing the gap S between the cross flow fan 1 and the cross flow fan 1 is adopted.

However, in the configuration of FIGS. 5 and 6, if the gap S between the crossflow fan 1 and the stabilizer 2 is narrowed, the air flow characteristic is improved, but conversely, the noise characteristic is deteriorated. As shown in FIG. 7, rotational noise (generally nZ, 2nZ) due to the number of blades and the number of rotations of the cross flow fan 1 is projected, so the gap S must be determined in consideration of noise performance and air flow performance. was there.

Further, the crossflow fan 1 and the stabilizer 2 are opposed to each other in the longitudinal direction for a long time, and the gap S between the crossflow fan 1 and the stabilizer 2 is the shortest distance.
Since the upper position P is on the same line with respect to the longitudinal direction, mutual interference is on the line and rotational noise is more likely to occur.

The present invention has been made in view of the above problems, and an object thereof is to reduce noise in an air conditioner and improve airflow performance.

Means for Solving the Problems In order to solve the above problems, the present invention separates a stabilizer from a crossflow fan by a predetermined dimension while facing the crossflow fan, and a distance between the crossflow fan and the stabilizer is predetermined. The dimension is gradually expanded at a predetermined expansion angle in the axial direction of the cross flow fan.

Further, according to the present invention, the position where the distance between the crossflow fan and the stabilizer has a predetermined dimension is gradually expanded at a predetermined expansion angle with respect to the axial center direction of the crossflow fan, and the expanded shape is the crossflow fan. A stabilizer shape corresponding to each series and corresponding to a series of adjacent cross flow fans is formed in the same expanded shape.

Further, according to the present invention, the position where the distance between the crossflow fan and the stabilizer has a predetermined dimension gradually expands at a predetermined expansion angle with respect to the axial direction of the crossflow fan, and the expanded shape has a crossflow fan shape. A stabilizer shape corresponding to each series and corresponding to a series of adjacent cross flow fans is formed in an opposite expanded shape.

Effect The present invention, with the above-described configuration, can reduce the rotational noise generated by the rotation of the cross flow fan and improve the air volume characteristic.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to FIG.

In the figure, 1 and 3 indicate the cross flow fan and the rear guider as in the conventional case. The stabilizer 2a of the present invention is arranged parallel to the axial direction of the cross flow fan 1. The shortest distance between the stabilizer 2a and the cross flow fan 1 is that the gap S is constant, and the position P on the stabilizer 2a where the gap S is the shortest distance is from θ ₁ to θ in the axial direction of the cross flow fan 1. _Since it gradually expands to _2, it changes linearly with P ₀ , P ₁ , P ₃ ... P _n .

Therefore, when the conventional cross-flow fan 1 makes one revolution, it linearly interferes with the stabilizer 2 to generate rotational noise, while the stabilizer 2a interferes with pointwise mutual noise, reducing rotational noise. As a result, the air volume characteristic can be improved. FIG. 4 shows the relationship between frequency and noise at that time.

Next, a second embodiment of the present invention will be described with reference to FIG.

Here, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the figure, the stabilizer 2b has the same shape that is gradually expanded in the axial direction of the crossflow fan ₁ from θ ₁ to θ ₂ with a constant gap S corresponding to each series of the crossflow fan 1. It has been repeated.

Therefore, similar to the first embodiment, when the cross flow fan 1 makes one revolution, the interfering points interfere with the stabilizer 2b, so that the rotation noise can be reduced, and as a result, the air volume characteristic can be improved. Further, since the developed shape is formed corresponding to each series of the cross flow fan 1, the noise reduction effect is larger than that of the first embodiment.

Finally, a third embodiment of the present invention will be described with reference to FIG.

Here, the same components as those in the previous embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the figure, the shape of the stabilizer 2c is gradually expanded from θ ₁ to θ ₂ in the axial direction of the crossflow fan 1 with the gap S being constant corresponding to each series of the crossflow fan 1, and If the stabilizer shape corresponding to the first series is expanded from θ ₁ to θ _2, the stabilizer shape corresponding to the next second series is the repetition of the shape expanded from θ ₂ to θ ₁ . .

Therefore, similar to the first and second embodiments, when the crossflow fan 1 makes one revolution, point-to-point mutual interference with the stabilizer 2c occurs, so that rotational noise can be reduced and, as a result, airflow characteristics can be improved. . Further developed shape formed to correspond to each series of the cross flow fan 1, and because of the smooth shape Fu say expand the stabilizer 2c from theta ₁ to the theta ₂ also reduced from theta ₂ to the theta _1, Since the pressure fluctuation does not occur at one time, the rotation noise can be further reduced as compared with the second embodiment.

EFFECTS OF THE INVENTION As is clear from the above embodiments, the present invention provides an air passage for communicating the air outlet and the air inlet, and a plurality of blades in the air passage and a plurality of support plates (ream) that support this blade. A crossflow fan impeller, a fan motor for driving the impeller, a rear guider, and a stabilizer provided separately from and facing the impeller, in a cross-flow blower, the stabilizer having a predetermined size while facing the crossflow fan. Only by separating it from the cross flow fan and gradually expanding it at a predetermined deployment angle with respect to the axial direction of the cross flow fan, it is possible to make point-like mutual interference and reduce rotational noise. As a result, the air volume characteristic can be improved.

Further, since the expanded shape corresponds to each series of cross flow fans and the stabilizer shapes corresponding to the series of adjacent cross flow fans are the same expanded shape, it is possible to further reduce noise.

Furthermore, the expanded shape corresponds to each series of cross flow fans, and the stabilizer shape corresponding to the series of adjacent cross flow fans is formed in the opposite expanded shape,
It has a smooth stabilizer shape and pressure fluctuation does not occur at once,
Greater noise reduction can be achieved.

[Brief description of drawings]

FIG. 1 is an internal sectional view of an indoor unit of a separate type air conditioner showing a first embodiment of the present invention, and FIG. 2 is an internal sectional view of an indoor unit showing a second embodiment of the present invention. FIG. 4 is an internal cross-sectional view of an indoor unit showing a third embodiment of the present invention, FIG. 4 is a characteristic diagram showing the relationship between frequency and noise characteristics showing the effect of the first embodiment of the present invention, FIG. FIG. 6 is a perspective view and a sectional view showing the structure of a conventional indoor unit, and FIG. 7 is a characteristic diagram showing the relationship between conventional frequency and noise characteristics. 1 ... Cross-flow fan, 2 ... Stabilizer, 3 ...
... Ria Gaida.

Claims (3)

[Claims] 1. A cross-flow fan impeller comprising a plurality of blades and a plurality of support plates (series) for supporting the blades provided with an air passage for communicating the air outlet with the air inlet. A fan motor for driving the vehicle, a rear guider, and an impeller are provided with a stabilizer that is opposed to the crossflow fan to form a cross-flow fan. An air conditioner having a stabilizer in which a position where the distance between the fan and the stabilizer has a predetermined dimension (position of the shortest distance) is gradually expanded at a predetermined expansion angle with respect to the axial direction of the crossflow fan. 2. A position where the distance between the crossflow fan and the stabilizer has a predetermined dimension (a position of the shortest distance) gradually expands at a predetermined expansion angle with respect to the axial direction of the crossflow fan, and the expanded shape. 2. The air conditioner according to claim 1, wherein each of the cross flow fans corresponds to a series of cross flow fans, and the stabilizer shapes corresponding to a series of adjacent cross flow fans have the same expanded shape. 3. A position where the distance between the crossflow fan and the stabilizer has a predetermined dimension (position of the shortest distance) gradually expands at a predetermined expansion angle with respect to the axial direction of the crossflow fan, and the expanded shape. 3. The air conditioner according to claim 1 or 2, wherein is corresponding to each series of cross-flow fans, and the stabilizer shape corresponding to a series of adjacent cross-flow fans is a reverse expanded shape.