JPS61138036A - Air blowing device - Google Patents

Abstract

PURPOSE:To enable to blow steadily and effectively the each different amount of air into both ventilating rooms by a method wherein two impellers having respective large and small impeller diameter are arranged with facing to two ventilating rooms. CONSTITUTION:A centrifugal blower 31 is divided by a center plate 20, also provided with two impellers, that is, an indoor side impeller 32 and an outdoor side impeller 33 in a space parts which are respectively faced to both ventilating rooms 3, 4. The both impellers 32, 33 are structured to be respectively provided with a large and a small impeller diameter. Thereby, at the blowing operation, two different amount of air blowings proportional to the square of each impeller radius are sucked through inlet ports 7, 18 and blown-off through outlet ports 8, 19.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blower device suitable for implementation in, for example, an air conditioner.

[Conventional technology]

Conventionally, air conditioners equipped with this type of blower were developed in Japanese Patent Application Laid-open No. 5
No. 8-55627 and is constructed as shown in FIG. To explain this based on the figure, 1 is a housing having two ventilation chambers 3 and 4 defined by a partition plate 2, and 5 is an indoor heat disposed inside the ventilation ★3 of this housing 1. 6 is a water tray disposed below the heat exchanger 5; 7 and 8 are an inlet and an outlet opening to the indoor side of the ventilation chamber 3; 9 is a suction lower and an indoor heat exchanger; 10 is a blower casing on the indoor side; 11 is a blower disposed in the housing 1 and has an indoor impeller 12 and an outdoor impeller 13; 14 is the blower 11; 15 is an outdoor heat exchanger disposed in the ventilation chamber 4; 16 is this heat exchanger 15;
17 is a water tray disposed below the indoor impeller 1;
2, a ventilation casing on the outdoor side having approximately the same size as the ventilation casing 10; 18 and 19, an inlet and an outlet opening to the outdoor side of the ventilation chamber 4; 20, the periphery thereof; This portion is a core plate that faces the receiving portion 2a provided on the partition plate 2 and has a U-shaped cross section and separates both the impellers 12 and 13. Further, 21 is a wind direction guide plate, 22 is an output shaft of the electric motor 14, and 23 is a compressor. Note that arrows in the figure indicate air flow.

In the blower device configured in this way, the indoor air sucked in by the indoor impeller 12 from the direction of arrow a passes through the blower casing lO and is discharged indoors from the outlet 8, and from the direction of arrow C. The outdoor air sucked by the outer impeller 13 passes through the blower casing 17 and is discharged outdoors from the outlet 19. Note that the indoor air and outdoor air exchange heat when passing through the heat exchanger 5.15.

[Problem that the invention seeks to solve]

However, in conventional blower devices, when sending air of different sizes to the air passages in the two-way wind chamber 3.4, the air passage resistance or blade width is changed, resulting in a decrease in efficiency. When used in an air conditioner or the like, there was a problem in that the casing became large in the axial direction.

The present invention has been made in view of these circumstances, and provides an air blowing device that can efficiently send different amounts of air into both ventilation chambers.

[Means for solving problems]

The blower device according to the present invention includes a centrifugal blower having two impellers separated by a core plate and facing into both ventilation chambers, and both impellers of the blower are set to have different blade diameters.

[For production]

In the present invention, since both impellers of the blower are set to have different blade diameters, the amount of air sucked in from the suction port and blown out from the outlet is different between the indoor side and the outdoor side.

〔Example〕

FIG. 1 is a sectional view showing an embodiment of the air blower according to the present invention used in an air conditioner. In the figure, the same members as in FIG. Explanation will be omitted. In the same figure, the reference numeral 31 designates a centrifugal blower, which is divided by the core plate 20 and has two indoor impellers 32. It has an outdoor impeller 33 and is disposed within the housing 1 so that the partition plate 2 is inserted therethrough. In this centrifugal blower 31, both the impellers 32 and 33 have different blade diameters, that is, the blade diameter of the outdoor impeller 33 is different from that of the indoor impeller 3.
It is set larger than the blade diameter of No. 2. As a result, when the blower is in operation, different amounts of air are drawn in from the suction lower 18 on the indoor side and on the outdoor side in proportion to the square of the blade diameter, and are blown out from the outlet 8.degree. 19.゛ □ Therefore, the air sucked in from the suction lower by the indoor impeller '32 undergoes heat exchange with the indoor heat exchanger 5, enters the ventilation casing 10, passes through the spiral passage in the ventilation chamber 3, and then passes through the spiral passage in the ventilation chamber 3. It is discharged into the room from the air outlet 8.

On the other hand, the air sucked in from the suction port 18 by the outdoor impeller 33 undergoes heat exchange in the outdoor heat exchanger 15, enters the ventilation casing 17, passes through the spiral passage in the ventilation chamber 4, and then passes through the air outlet 19. is released outdoors.

In the blower device configured in this way, both impellers 3
Since the diameters of the 2.33 blades are set to different sizes, air with different volumes is efficiently sent between the indoor and outdoor sides. In addition, an indoor impeller 32 and an outdoor impeller 33
Since there is a *b tank structure in a space of 3° 4 □ in each ventilation chamber, when used in an air conditioner or the like, it can be designed without increasing the axial dimension of the housing 1.

Although the present embodiment shows an example in which the electric motor 14 is positioned outside both impellers 32 and 33, the present invention is not limited to this, and the electric motor 14 is positioned inside the outdoor impeller 33 as shown in FIG. A space 34 is formed, and the electric motor 14 is installed in this space 34.
It is also possible to have a structure in which a part of the building is exposed. Thereby, when used in an air conditioner or the like, the axial dimension of the housing 1 can be reduced.

Further, as shown in FIG.
The peripheral edge of the core plate 20 may be configured to face the partition plate 2 in order to prevent air generated by the rotation of the core plate 3 from leaking into the anti-recirculation chamber 3°4. This eliminates the need to provide the receiving portion 2a with a U-shaped cross section on the partition plate 2, which was conventionally required.
The structure and workability can be simplified.

〔Effect of the invention〕

As explained above, according to the present invention, there are two
A centrifugal blower with two impellers is provided, and both impellers of this blower are set to have different blade diameters, so different amounts of air can be efficiently and reliably sent into both ventilation chambers. Furthermore, since the structure does not change the blade width of the impeller, there is no need to make the casing large in the axial direction as in the conventional case, and it is extremely effective when implemented in, for example, an air conditioner.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the air blower according to the present invention used in an air conditioner, FIGS. 2 and 3 are longitudinal sectional views showing other embodiments, and FIG. It is a longitudinal cross-sectional view showing an example of a case where a conventional air blower is used in an air conditioner. 1... Housing, 2... Partition plate, 3.4... Ventilation chamber, 20... Core plate, 31... Centrifugal blower, 3
2... Indoor impeller, 33... Outdoor impeller. Agent Masuo Daiiwa Figure 1 Figure 2:4τψ脹 Figure 4 Figure 2j Figure 3

Claims (3)

[Claims] (1) A centrifugal blower having two impellers disposed in a housing defined by a partition plate into two ventilation chambers, separated by a core plate, and facing each of the two ventilation chambers,
A blower device characterized in that both impellers of the blower are set to have different blade diameters. (2) The blower device according to claim 1, wherein one of the two impellers has a space formed inside thereof, into which an electric motor that drives the centrifugal blower faces. (3) The blower device according to claim 1, wherein the peripheral edge of the core plate faces the partition plate.