JP3039360B2 - Outdoor unit for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit for an air conditioner, and more particularly to an arrangement structure of electric components in an outdoor unit for an air conditioner controlled by an inverter.

[0002]

2. Description of the Related Art In general, the interior of a casing of an outdoor unit for an air conditioner is provided with a heat exchanger and a heat exchange chamber in which a fan is disposed without being affected by water. And a component storage chamber in which the components are disposed via a partition member extending in the front-rear direction of the casing (see, for example, Japanese Utility Model Laid-Open No. 1-116331). The storage was arranged.

Meanwhile, in recent years, a technique for improving the performance by controlling the frequency of the operation of the compressor (in other words, inverter control) has been frequently used. In this case, high temperature heat is generated during operation. An inverter control element (for example, a power transistor, a diode, or the like) is required, and the inverter control element needs to be cooled.

In view of the above requirements, in the prior art, the inverter control element is arranged on the back side of the cooling fin formed on the partition member, while the control board having various operation control elements is mounted on the front of the component storage chamber of the casing. In this case, an L-shaped layout in which the two are separated from each other has been taken.

[0005]

However, in the case of an L-shaped layout in which the inverter control element and the control board are separated from each other as described above, the cooling performance is reduced because the control board is separated from the ventilation path, It may cause an increase in the size of the switch box surrounding the control element and the control board, or may deteriorate the assemblability of the switch box,
There has been a problem that the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and improves the cooling performance and reduces the size of a portion where electric parts are provided by arranging an inverter control element and a control board integrally and substantially vertically. -It is intended to reduce the weight and cost.

[0007]

The basic structure of the present invention is as follows.
Is a box-shaped cable
A partition extending in the front and rear direction of the casing 1 inside the thing 1
The member 4 is provided, and the heat exchanger 5 and the
The heat exchange chamber 2 where the fan 6 is installed and the various electrical parts
For an air conditioner having a compartment formed with the component storage room 3 to be installed
In the outdoor unit, the partition member 4And the casing 1
A partition plate 11 that is attached to the partition plate 11;
Orthogonal to the front surface 1a of the casing 1 and the heat exchange chamber
Switch box 1 having a first vertical surface 12a facing the second box 2
2 and the switch box 12
In the first vertical plane 12aOn the heat exchange room 2 side,cooling
Fins 16, 16 ...While installing the switch
In the first vertical plane (12a) of box 12The parts
Inverter control element 2 that generates heat during operation
6Corresponding to the cooling fins 16, 16,.Installation
Ke,furtherThe inverter control element 26Heat exchange room side
Next, a control board 27 having various operation control elements
Of thing 1So as to be perpendicular to the front surface 1aAlmost verticalTake in posture
AttachmentTo improve cooling performance and reduce the size of electrical parts
It is possible to reduce the weight, weight, and cost.

In the basic configuration of the present invention, it is preferable to arrange a high-frequency service control element among the various operation control elements in the control board 27 on the front side in that the serviceability of the control board 27 can be ensured.

It is preferable that the control board 27 is disposed in the heat exhaust passage 37 from the component storage chamber 3 to the heat exchange chamber 2 because the cooling performance of the control board 27 is further improved.

Further, it is preferable that a terminal block 33 for power supply connection is disposed in a surplus space formed on the side of the control board 27 so as to face the terminal block 33, since workability with the terminal block 33 can be ensured.

[0011]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

This outdoor unit for an air conditioner has a box-shaped casing 1 in which a heat exchanger 5 is provided.
And a heat exchange chamber 2 in which a fan 6 is disposed and a component storage chamber 3 in which a compressor 7 and various electric components are disposed via a partition member 4 extending in the front-rear direction of the casing 1.

The casing 1 has air inlets 8 on the back and one side of the heat exchange chamber 2, and an air outlet 9 on the front of the heat exchange chamber 2, respectively. The heat exchanger 5 has an L-shaped cross section and is arranged along the air inlets 8. The fan 6 is of an axial flow type, and is disposed so as to face the air outlet 9. Reference numeral 10 denotes a fan motor.

The partition member 4 partitions the casing 1 from the front surface 1a to the rear surface 1b. In the present embodiment, the partition member 11 is attached to the partition plate 11 (described in detail later). Switch box 12
(See FIGS. 4 and 5).

As shown in FIGS. 4 and 5, the switch box 12 has a first vertical surface 12a orthogonal to the front surface 1a of the casing, and a lateral side from the rear end of the first vertical surface 12a. A second vertical surface 12b extending at a right angle toward the third vertical surface 12b, a third vertical surface 12c extending at a right angle forward from a side end of the second vertical surface 12b, and a third vertical surface 12c. A fourth vertical surface 12d extending at a right angle from the front end to the side, and the first vertical surface 1d.
2a, a flange portion 12e extending laterally
Are integrally extended. Reference numeral 13 denotes the flange 1
A bottom plate 14 covers from the lower end of 2e to the center of the lower end of the second vertical surface 12b, and 14 is a horizontal flange extending forward from the lower end of the fourth vertical surface 12d.

The heat exchange chamber 2 of the first vertical surface 12a
On the side, there is provided a hood 15 having a rectangular cross section which is located at the upper end and serves as a discharge port for exhausting heat, and a number of horizontal cooling fins 16 are provided immediately below the hood 15. ing.

The hood 15 has a U-shaped cross section open at the top and bottom, and has a rib 17 protruding from the first vertical surface 12a and an anti-first vertical at its middle part and lower end in the vertical direction. Ribs 18 protruding from the surface side to the position overlapping with the ribs 17 are formed. By doing so, the inside of the hood 15 becomes a meandering passage formed by the ribs 17 and 18, and water that has entered the heat exchange chamber 2 does not enter the component storage chamber 3 from below the hood 15. is there.

The cooling fins 16, 16,... Are fixed to the first vertical surface 12a by screws or the like, and are arranged in the vertical direction of the first vertical surface 12a. The reason for this is that the air flow flowing in the heat exchange chamber 2 due to the operation of the fan 6 becomes a flow in the front-rear direction in the cooling fins 16, 16.

As shown in FIGS. 1 and 4, the partition plate 11 is disposed in the component storage chamber 3, and has a central portion recessed toward the heat exchange chamber 2 so as to avoid interference with the compressor 7. The switch box 12 is provided substantially at the center thereof.
A notch hole 19 for attaching a hole is formed.
reference).

On the other hand, guide rails 21, 22 and 23 for engaging the front and rear edges 19a, 19b of the notch hole 19 of the partition plate 11 are provided on the flange portion 12e and the second vertical surface 12b of the switch box 12. , 24 are attached (see FIG. 4).

The guide rails 21, 22, and 23,
24, the guide rails 21 and 23 on the component storage chamber 3 side.
Extend over the entire vertical length of the flange portion 12e and the second vertical surface 12b, and extend along the guide rails 22, 24 on the heat exchange chamber 2 side.
Is shorter than the guide rails 21 and 23. By doing so, the notch hole edges 19a, 19b are sandwiched between the guide rails 21, 22, 23, and 24, and from the heat exchange chamber 2 side to the component storage chamber 3 via the engaging portions of both. Water does not enter, and the waterproof effect is improved. Further, the guide rails 22 on the heat exchange chamber 2 side,
24 is shorter than the guide rails 21 and 23 on the component storage chamber 3 side, so that the switch box 12
When installing the switch box 1
2 is slightly inclined to the heat exchange chamber 2 side, and the guide rails 21 and 23
The guide rails 21, 22 and 23, 23
The engagement of the cutout edges 19a, 19b with the switch box 24 can be performed easily, and the mounting of the switch box 12 can be performed easily and smoothly. The bottom plate 13 of the switch box 12
A seal member 20 for securing water tightness with the lower edge of the notch 19 is attached to the lower surface (see FIGS. 2 and 5).

The upper end of the partition plate 11, the portion of the flange 12e on the heat exchange chamber 2 side with respect to the guide rails 21 and 22, the upper end of the first vertical surface 12a except for the mounting portion of the hood 15, and the upper end of the hood 15. And a portion of the upper end of the second vertical surface 12b closer to the heat exchange chamber 2 than the guide rails 23 and 24 is continuous at the same height, and constitutes the partition member 4 which is in contact with the top plate 1c of the casing 1. Has become. Accordingly, the upper surface of the hood 15 is also sealed by the casing top plate 1c, and the hood 1
Water does not enter the switch box 12 through the inside of the switch box 5. That is, the casing top plate 1c doubles as the lid of the switch box 12. Reference numeral 25 denotes a seal member for ensuring watertightness with the casing top plate 1c and preventing dew condensation on the casing top plate 1c.

By the way, an inverter control element (for example, a power transistor) that generates heat at a high temperature when activated at a position corresponding to the cooling fins 16, 16,. , Diodes, etc.) 26 are attached. That is, the heat generated in the inverter control element 26 is radiated by the cooling fins 16, 16,.

A control board 27 having various operation control elements is directly mounted on the inverter element 26. The control board 27 is perpendicular to the front surface 1a of the casing 1 and in a vertical posture. Switch box 1
2 are attached to the first vertical surface 12a at appropriate locations via fasteners 38, 38,. By doing so, the inverter control element 26 and the control board 2
7 are arranged in the switch box 12 with the widthwise dimension kept as small as possible, so that the cooling performance of the inverter control element 26 is ensured, and the size, weight and cost of the switch box 12 are reduced. This is extremely advantageous for downing. The control board 27 is provided with various operation control elements. Among them, the elements having a high service frequency (for example, the light emitting diode 28, the connectors 29
) Are concentrated on the front side. If you do this,
Since a service lid (not shown) is provided on the front surface 1a of the casing 1 (specifically, the front surface of the component storage chamber 3), the control board 27 is arranged orthogonal to the front surface 1a of the casing 1. Even so, serviceability will not be impaired.

An electric field capacitor 30 is mounted on the front surface of the second vertical surface 12b of the switch box 12, and a reactor 31 is provided on the side surface of the third vertical surface 12c.
And a noise filter 32, and a terminal block 33 for power supply connection is mounted on the front surface of the fourth vertical surface 12d. Reactor 31 which is a high heat generating electric component which is high in temperature (for example, 170 ° C.) during operation and has high heat resistance.
Is a control board 27 which is a low heat generation electric component that generates a small amount of heat during operation and has low heat resistance (for example, 60 to 80 ° C.).
In this way, the radiant heat from the reactor 31 does not reach the control board 27.

Further, a part of the upper end of the first vertical surface 12a (that is, a part surrounded by the hood 15) and a part of the upper end of the third vertical surface 12c of the switch box 12 are cut out portions 34 lower than the upper end of the hood 15. , 35.
Here, the notch 34 surrounded by the hood 15 is provided with a heat exhaust passage 3 from the component storage chamber 3 side to the heat exchange chamber 2 side as described later.
It is the exit for 6,37. The two notches 34,
A baffle member 36 having a U-shaped cross section is provided between the members 35. The air guide member 36 has an effect of connecting the first vertical surface 12a and the third vertical surface 12c of the switch box 12 to enhance the rigidity of the vertical surfaces 12a and 12c.

The space surrounded by the first, second, and third vertical surfaces 12a, 12b, and 13c and the cutout portion 34 of the first vertical surface 12a guide the air that has cooled the control board 27 to the hood 15. And the wind guide member 36 constitutes a second heat exhaust passage for guiding the air that has cooled the reactor 31 to the hood 15.

Therefore, the operation of the fan 6
The air W ₁ (see FIGS. 2 and 5) that has cooled the control board 27 is supplied to the heat exchange chamber 2 through the first exhaust heat passage 37, the notch 34, and the hood 15.
The air W ₂ (see FIGS. 2 and 5) which has been sucked into the reactor 31 and cooled the reactor 31 is sucked into the heat exchange chamber 2 via the second exhaust heat passage (that is, the air guide member 36) and the hood 15. It becomes. That is, the first and second
The exhaust heat passages 37 and 36 are provided in the hood 15 as one exhaust port.
And is communicated to the heat exchange chamber 2 side via the.

That is, the reactor 3 which is a high heat generating electric component
1 and the control board 27, which is a low heat-generating electric component having inferior heat resistance, are disposed in separate heat exhaust passages 37 and 36, so that the cooling performance of the reactor 31 can be secured.
This can effectively prevent the thermal influence on the control board 27. The notch 3 is formed so that the amount of heat exhausted from the first heat exhaust passage 37 is larger than the amount of heat exhausted from the second heat exhaust passage 36.
The cross-sectional area of the notch 34 is larger than the cross-sectional areas of the notch 5 and the air guide member 36. Reference numeral 39 denotes an air intake to the component storage chamber 3.

[0030]

According to the present invention, according to the present invention, the partition member 4 that partitions the casing 1 into a heat exchange chamber 2 and the equipment housing 3, the
A partition plate 11 for partitioning the casing 1 and the partition plate 11
And is orthogonal to the front surface 1a of the casing 1 and
A switch having a first vertical surface 12a facing the heat exchange chamber 2.
And the switch 12
The first vertical surface 12a of the box 12 on the heat exchange chamber 2 side
, Cooling fins 16, 16
Parts storage room 3 of first vertical plane 12a in box 12
At the side corresponding to the cooling fins 16, 16,...
Inverter control element 26 that generates heat when activated
The inverter control element 26 is connected to the cooling fin 1
6, 16... Has an effect of being effectively cooled.

Also, the counter heat exchange of the inverter control element 26 is performed.
A control board 27 having various control elements for operation is located in front of the room.
A substantially vertical posture so as to be orthogonal to the front surface 1a of the casing 1.
, The inverter control element 26 and
The width dimension of the control board 27 can be kept small,
This has the effect of reducing the size, weight, and cost of the electrical component installation portion.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a casing top plate of an outdoor unit for an air conditioner according to an embodiment of the present invention is removed.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a plan view of a switch box in the outdoor unit for an air conditioner according to the embodiment of the present invention.

FIG. 5 is a front view of a switch box in the outdoor unit for an air conditioner according to the embodiment of the present invention.

[Explanation of symbols]

1 is a casing, 1a is a casing front, 1b is a casing back, 1c is a casing top plate, 2 is a heat exchange room, 3 is a parts storage room, 4 is a partition member, 5 is a heat exchanger, 6 is a fan, and 11 is a partition. Plate, 12 is a switch box, 12a is a first vertical surface, 12b is a second vertical surface, 12c is a third vertical surface, 12d is a fourth vertical surface, 12e is a flange portion, 16 is a cooling fin, 26 is an inverter control element , 27 is a control board, 28 is a light emitting diode, 29 is a connector, 33 is a terminal block, 36 is a second heat exhaust passage (wind guide member), and 37 is a first heat exhaust passage.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hajime Kurata 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries, Ltd. Sakai Works Kanaoka Factory (56) References JP-A-7-55200 (JP, A) JP-A-3-152325 (JP, A) JP-A-8-145411 (JP, A) JP-A-8-86473 (JP, A) JP-A-6-51734 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) F24F 5/00

Claims (4)

(57) [Claims] 1. A partition member (4) extending in the front-rear direction of a casing (1) is disposed in a box-shaped casing (1), and the heat exchanger (5) and the heat exchanger (5) are arranged by the partition member (4). An outdoor unit for an air conditioner in which a heat exchange chamber (2) for disposing a fan (6) and a component storage chamber (3) for disposing various electric components and the like are defined, and the partition member ( 4), the Quai
Plate (11) for partitioning the packaging (1), and the partition plate
(11) attached to the front surface of the casing (1)
First lead orthogonal to (1a) and facing the heat exchange chamber (2)
A switch box (12) having a face (12a)
And the switch box (12)
The said heat exchange chamber (2) side of the first vertical surface (12a), the cooling fins (16), one mounting (16) ..
On the other hand, the first vertical surface (12) of the switch box (12)
The said equipment housing (3) side in a), the cooling fins of the inverter control element which generates heat during operation (26)
(16), (16) ... and mounted so as to correspond, further <br/> counterclockwise heat exchange chamber side of the inverter control element (26), said control board (27) having various operation control device A substantially vertical view perpendicular to the front surface (1a) of the casing (1)
An outdoor unit for an air conditioner, wherein the outdoor unit is mounted at a high speed. 2. The outdoor unit for an air conditioner according to claim 1, wherein, among the various operation control elements on the control board (27), those having a high service frequency are arranged on the front side. 3. A heat exhaust passage (37) for transferring said control board (27) from said component storage chamber (3) to said heat exchange chamber (2).
The said claim 1 and Claim characterized by being arrange | positioned inside.
Item 3. An outdoor unit for an air conditioner according to any one of Item 2 . Wherein said claims 1 to 3, characterized in that the forward placement terminal block for power connections (33) for surplus space formed on a side of the control board (27) The outdoor unit for an air conditioner according to any one of the above.