JPH102581A - Outdoor machine for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compact and slim a heat exchanging unit to improve heat exchanging performance by a method wherein one end of the end unit side of scroll of a heat exchanger is extended straightly by a predetermined length to the back surface side of the end of the scroll. SOLUTION: A scroll fan 2 is arranged so that the upstream side (air sucking end part) 10a of a scroll unit 10 is approximated to the rear end 3b side of a heat exchanger 3 while the rear end 3b of the heat exchanger 3 is extended by a predetermined length L straightly to the, back of the upstream end 10a of the scroll unit 10 and the extension line (a) is constituted so as to be intersected with the tangential line (b) of the imaginary curved surface R of the upstream end 10a of the scroll unit 10. According to this method, the scroll fan is formed so that the flow of air, entering the scroll fan 2, is opposed to the blade of the scroll fan 2 whereby effective reverse pre-whirling effect is generated and the efficiency of the fan is improved. Accordingly, the heat exchanging unit can be compacted and slimed while the heat exchanging performance of the same can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the structure of an outdoor unit for an air conditioner.

[0002]

2. Description of the Related Art In a conventional outdoor unit for an air conditioner, an L-shaped heat exchanger is disposed in a generally box-shaped outdoor unit casing, and a propeller fan is provided at a rear corner of the heat exchanger. To form a heat exchange unit,
On one side, a machine room having a compressor and electrical components is arranged adjacently through a partition wall.

However, the use of the propeller fan has a disadvantage that it is difficult to make the main body of the outdoor unit compact and slim.

In view of the above, for example, some proposals have been made in which a cross-flow fan is employed in place of the propeller fan and the outdoor unit main body is made to be vertically long to achieve compactness and slimness.

[0005] Among those adopting the cross-flow fan, for example, a substantially L-shaped heat exchanger is arranged from the front side to one side in an outdoor unit casing, and a cross-flow fan is provided on the other side. Forming an air passage in the left-right direction such that air is sucked from an air suction port formed on the one side of the outdoor unit casing and blown out from an air outlet formed on the other side of the outdoor unit casing, Further, a machine room is provided on the back side of the air passage through a partition wall (see Japanese Patent Publication No. 6-63655),
In addition, a flat heat exchanger is arranged only on the front side inside the outdoor unit casing, and a cross flow fan is provided behind the heat exchanger via a scroll part, and air blown from the cross flow fan is blown to the side of the outdoor unit casing. (See JP-A-55-118562).

However, in these devices, when the outdoor unit itself is made compact and slimmer, the heat exchange area itself of the heat exchanger is inevitably reduced, and the fan blowing capacity is also reduced. There is a disadvantage that the heat exchange capacity is reduced.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and has the following means for solving the problems.

First, an outdoor unit for an air conditioner according to the present invention, as shown in FIGS. 1 to 3, for example, has an air inlet 12a of an air passage 12 formed with a scroll portion 10.
An air conditioner outdoor unit comprising a cross flow fan 2 provided in the vicinity and a heat exchanger 3 bent so as to surround the cross flow fan 2 around the cross flow fan 2. The end 3b on the scroll end side of the container 3 is straightened to the scroll end 1 by a predetermined length.
A predetermined length is extended to the back side of Oa.

As described above, the cross flow fan 2 is provided near the air suction port 12a of the air passage 12 formed with the scroll portion 10, and the cross flow fan 2 is provided around the cross flow fan 2 around the cross flow fan 2. If the heat exchanger 3 bent so as to surround the fan 2 is provided, the heat exchanger 3 can be reduced in size as much as possible as a whole by the bent structure, and still have sufficient heat exchange. The area can be secured, and the heat exchange unit itself can be made compact and slim.

Further, since the cross flow fan 2 is located between the heat exchangers 3 bent so as to surround the cross flow fan 2, the suction air flow by the driving of the cross flow fan 2 is efficiently performed. As a result, the heat passes through the entire heat exchanger 3 well and the heat exchange performance is improved.

In particular, in this configuration, in addition to the above configuration, one end 3b of the heat exchanger 3 on the scroll end 10a side is straightly extended for a predetermined length to a rear side of the scroll end 10a for a predetermined length. Therefore, the heat exchange area of the heat exchanger 3 can be further increased by that much, and the heat exchange performance can be further improved.

In addition, since the extending portion extends straight as described above, the straight portion can be effectively used as a grip portion for bending the heat exchanger 3 in the heat exchanger unit manufacturing process. it can.

Further, in the outdoor unit for an air conditioner of the present invention, in the above configuration, the extension line a
Is a tangent b to the virtual radius surface R of the scroll end 10a.
It is extended so that it may cross.

Therefore, the flow of the air flowing into the air passage 12 through the extended portion of the heat exchanger 3 is improved, and the expanded heat exchange area can be effectively used, and the heat exchange performance can be improved. improves.

Further, in the above configuration, when the compressor 5 is disposed in the space inside the casing 7 outside the scroll portion 10, the inside of the casing 7 outside the scroll portion 10 is reduced by the above-mentioned compact and slim operation. A sufficient extra space can be formed in the space, and the layout of the compressor 5 is facilitated.

[0016]

As described above, according to the outdoor unit for an air conditioner of the present invention, the following advantageous effects can be obtained.

It is possible to make the device as compact and slim as possible.

The heat exchange performance is improved.

The layout of the compressor is facilitated.

It can be relatively easily installed even in a narrow installation place such as a veranda.

The cost of materials such as a casing can be reduced, and the cost can be reduced.

[0022]

1 to 3 show the construction of an outdoor unit for an air conditioner according to an embodiment of the present invention.

First, in the figure, reference numeral 1 denotes the same outdoor unit. The outdoor unit 1 includes a heat exchange unit 1A including, for example, a cross flow fan 2, a heat exchanger 3, a fan motor 4, and the like, and a compressor 5, refrigerant pipes 5a, 5a,
A machine room unit 1B provided with various electrical components 6 and the like. These two unit portions 1A and 1B are appropriately arranged and integrated on substantially both sides via a scroll portion 10 and housed in a cassette type casing 7. As a whole, it is formed in a vertically long and thin slim structure.

The casing 7 of the outdoor unit 1
The first and second tapered surfaces are formed such that a central portion on the front side is formed on a flat surface 7a, and both left and right portions of the flat surface 7a are inclined with a slight radius from the front surface to the rear side. 7b and 7c.

In the heat exchange unit 1A, four surfaces from the front flat surface 7a of the casing 7 to the second tapered surface 7c on the right side, the right side surface 7d, and the right side surface 7e on the rear side are formed as follows. A first tapered surface 7b on the front left side is formed on an air suction grille portion corresponding to a wide outer peripheral surface of the heat exchanger 3 bent into a substantially U-shaped cross section, which will be described later. 12 air outlets 1
2b is formed in the air blowing grille section.

Then, as described above, the front side flat surface 7
a to the right side second tapered surface 7c, the right side surface 7d, and the space portion inside the air suction grill portion formed substantially over the entire surface from the rear right side surface 7e portion along the bending direction of each surface. As described above, the heat exchanger 3 which is bent into a substantially U-shaped cross section and has a bent structure is provided. The heat exchanger 3
As will be described in detail later, the rear end portion 3b is disposed to extend straight behind the upstream end 10a of the scroll portion 10 by a predetermined length L.

The front and rear ends of the heat exchanger 3 located near the center in the back side from the inside of the air blow-out grill portion are located inside the air blow-out grill portion formed on the front left tapered surface 7b. A scroll portion 10 is provided extending in a parabolic shape as shown in the drawing to a position closer to the inner side between the portions 3a and 3b. An air passage 12 for the cross flow fan 2 is formed. The air inlet 12a of the air passage 12 is connected to the air suction grill through the heat exchanger 3, and the air outlet 12b is connected to the air outlet grill. As described later, the compressor 5 and refrigerant pipes (communication pipes) 5a, 5a for the compressor 5 and various electrical components are provided on the rear left side (corner part) of the scroll part 10 forming the air passage 12 as described later. A machine room space 13 in which the articles 6 and the like are installed extends vertically.

On the heat exchange unit 1A side,
A fan motor 4 for driving the cross flow fan 2 is provided above the cross flow fan 2, while the refrigerant pipes 5 a, 5 a of the compressor 5 extend upward on the machine room unit 1 B side. By providing the joints (closing valves) 5b, 5b, a top joint structure that can be easily connected to the indoor unit is realized.

The inside of the front and rear ends 3a and 3b of the heat exchanger 3 having the U-shaped cross section and the scroll
A cross-flow fan 2 is provided in the vicinity of the air inlet 12a of the air passage 12 formed by the blower and extending in the vertical direction. The cross flow fan 2 has its lower end (not shown) rotatably supported by a bearing provided on the bottom wall (not shown) of the casing 7 on the heat exchange unit 1A side. On the other hand, the upper end of the rotary shaft 14 is connected to the heat exchange unit 1A of the casing 7 described above.
The fan motor 4 can be driven by being connected to a drive shaft 4a of the fan motor 4 fixedly provided on the lower surface side of the side ceiling wall via a mounting bracket (not shown).

Therefore, when the fan motor 4 is driven, the cross flow fan 2 is rotated by the fan motor 4 and the outside air is sucked in from the air suction grille side, so that the heat exchanger 3 and the cross flow The air that has been heat-exchanged through the fan 2 and the air passage 12 is efficiently blown to the outside from the air blowing grill portion.

In this case, for example, as shown in FIG. 3, the cross flow fan 2 is moved toward the rear end 3b of the heat exchanger 3 at the upstream end (air inlet end) 10a of the scroll portion 10. And the rear end portion 3b of the heat exchanger 3 extends straight behind the upstream end 10a of the scroll portion 10 by a predetermined length L as described above,
The extended line “a” is configured to intersect with the tangent “b” of the virtual round surface R at the upstream end 10 a of the scroll portion 10. With this configuration, first, with the former configuration, the flow of air flowing into the cross flow fan 2 is formed so as to face the blades of the cross flow fan 2 as shown in FIG. 3, for example. Thus, an effective reverse pre-swirl effect occurs, and the fan efficiency is improved. As a result, the blowing performance is improved and the blowing sound is reduced. Further, with the latter configuration, a sufficient machine room space 1 is provided between the scroll portion 10 and the cassette casing 7.
3 is formed, and the flowability of air flowing into the cross flow fan 2 through the extending portion is improved,
Heat exchange performance is improved.

As described above, first, in the outdoor unit for an air conditioner according to the embodiment of the present invention, the heat exchange unit 1A, which is the basic component thereof, has the crossflow fan 2 as the center and the outer periphery thereof. The heat exchanger 3 has a U-shaped cross section so as to surround the cross flow fan 2.

Therefore, the heat exchanger 3 can be made as compact and small as possible as a whole, and a sufficient heat exchange area can be ensured. The cross flow fan 2, the heat exchanger 3, and the fan The heat exchange unit 1A including the motor 4 and the like can be made compact.

As a result, the cross flow fan 2 and the heat exchanger 3 are compactly housed in the casing 7 of the heat exchange unit 1A, so that the entire outdoor unit can be designed to be small and slim.

As a result, restrictions on the installation location are reduced,
Installation work is also easy.

The cross flow fan 2 is located almost completely surrounded by the heat exchangers 3 bent in a U-shaped cross section so as to surround the cross flow fan 2. , The suction airflow is efficiently and evenly passed through the heat exchanger 3, and the heat exchange performance is further improved. Moreover, in this case, the relationship between the above-mentioned cross flow fan 2 and its scroll portion 10 and heat exchanger 3 is as shown in FIGS. 2 and 3, so that the flow of air flowing into the cross flow fan 2 is reduced. The blade is formed so as to face the blade, and the fan efficiency is improved by the reverse pre-swirl effect. As a result, the fan efficiency is improved and the blowing noise is considerably reduced as compared with the conventional structure.

The scroll end side one end 3b of the heat exchanger 3 is extended straight behind the upstream end 10a of the scroll portion 10 by a predetermined length L, and an extension line a thereof is connected to the scroll portion. It is configured to intersect the tangent b of the virtual round surface R of the upstream end 10a. Accordingly, a sufficient machine room space 13 is formed between the scroll portion 10 and the cassette casing 7, and the flow of air flowing into the cross flow fan 2 through the extension portion is improved, so that the heat exchange performance is improved. improves.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of an outdoor unit for an air conditioner according to an embodiment of the present invention as viewed from the front side.

FIG. 2 is a schematic horizontal sectional view as viewed from above the outdoor unit.

FIG. 3 is a schematic sectional view showing an operation of a main part of the outdoor unit.

[Explanation of symbols]

1 is an outdoor unit, 1A is a heat exchange unit, 1B is a machine room unit, 2 is a cross flow fan, 3 is a heat exchanger, 4 is a fan motor, 5 is a compressor, 6 is electrical equipment, 7
Denotes a casing, 10 denotes a scroll portion, 10a denotes an upstream end of the scroll portion, 12 denotes an air passage, and 12a denotes an air inlet of the air passage.

Claims (3)

[Claims] 1. A cross flow fan (2) is provided near an air inlet (12a) of an air passage (12) formed with a scroll portion (10), and a cross flow fan (2) is provided around the cross flow fan (2). An outdoor unit for an air conditioner comprising a heat exchanger (3) bent so as to surround the cross flow fan (2), wherein one end (3b) of the heat exchanger (3) on a scroll end side is provided. ) Is extended straight to a rear side of the scroll end (10a) for a predetermined length. 2. An extension line (a) of the extension portion is extended so as to intersect with a tangent line (b) of a virtual round surface (R) of the scroll end portion (10a). Item 3. An outdoor unit for an air conditioner according to Item 1. 3. The air conditioner according to claim 1, wherein a compressor (5) is provided in an inner space (13) of the casing (7) outside the scroll portion (10). Outdoor unit.