JP3079990B2 - 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 the structure of a switch box in an outdoor unit for an air conditioner.

[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.

[0003]

By the way, a normal switch box can be arranged at a position distant from a partition plate. For example, in the case of an outdoor unit for an air conditioner in which a compressor is inverter-controlled. Since the inverter control element, which generates heat at high temperature during operation, is required, the switch box in which the inverter control element is disposed must be cooled. (Ie, the side of the heat exchange chamber provided with the fan), and the high temperature air accumulated in the switch box needs to be released to the side of the heat exchange chamber.

Due to the above-mentioned restrictions, the conventional switch box has a closed upper surface to prevent water from entering the inside. However, in this case, the structure becomes complicated and the cost is disadvantageous. Becomes In addition, the use of the hermetic structure causes a new problem that the structure for exhausting heat from the inside of the switch box becomes complicated.

The present invention has been made in view of the above points, and has as its object to ensure the waterproof function of a switch box in an outdoor unit for an air conditioner, to simplify the structure, and to reduce the cost. Is what you do.

[0006]

According to the basic structure of the present invention, as a means for solving the above-mentioned problems, a heat exchange chamber 2 and a parts storage chamber 3 are defined in a casing 1 by a partition plate 11. In the air conditioner outdoor unit having the switch plate 12 attached to the partition plate 11,
While it serves the casing top plate 1c as the lid of the switch box 12 by contact via the sealing member 25 to the upper surface the top plate 1c of the opening to the casing 1 of the switch box 12, the switch box
The heat exchange chamber from the component storage chamber 3 side
While forming the outlet 34 of the exhaust heat passage 37 to the 2 side,
Around the heat exchange chamber 2 side of the exhaust heat passage outlet 34,
The sealing member 25 is attached to the casing top plate 1c.
Waterproof cover with an upper surface abutted and an open top and bottom
Annexed to over leads 15, the inside of the hood 15, cross each other
A meandering passage formed by horizontal ribs 17, 18 ;
The waterproof function of the switch box 12 is ensured, the structure is simplified, and the cost is reduced.

In particular, the hood 15 is connected to the outlet of the exhaust heat passage 34.
Configuring the path and a waterproof member to the exhaust heat passage outlet 34;
Water in the switch box 12
Can be effectively prevented.

The inside of the hood 15 crosses each other.
Meandering passage formed by horizontal ribs 17 and 18
Water is prevented from entering from below the hood 15.
This prevents water from entering the switch box 12.
Stopping is more perfect.

[0009]

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 4 is attached to the partition plate 11 (to be 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 surface extending from a rear end of the first vertical surface 12a. A second vertical surface 12b extending at a right angle toward the front surface, 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 with the flange portion 12e and the second vertical surface 12b of the switch box 12, respectively. , 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).

Then, the upper end of the partition plate 11, the portion of the flange 12e at the upper end of the guide rails 21 and 22 closer to the heat exchange chamber 2, 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) which 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 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 notched 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.

[0028]

According to the present invention, the upper surface of the switch box 12 attached to the partition plate 11 for partitioning the inside of the casing 1 into the heat exchange chamber 2 and the parts storage chamber 3 is opened, and the top plate 1c of the casing 1 is opened. On the other hand, the casing top plate 1c is also used as a lid of the switch box 12 by abutting through the seal member 25, so that the waterproof function of the switch box 12 can be ensured without a conventional closed structure. Thus, there is an effect that the structure can be simplified and the cost can be reduced while securing the prevention function.

The hood 15 is connected to the outlet of the exhaust heat passage 34.
Configuring the path and a waterproof member to the exhaust heat passage outlet 34;
Water in the switch box 12
Is also effectively prevented.

The inside of the hood 15 crosses each other.
Meandering passage formed by horizontal ribs 17 and 18
Water is prevented from entering from below the hood 15.
This prevents water from entering the switch box 12.
There is also an effect that stopping is more perfect.

[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, 5 is a heat exchanger, 6 is a fan, 11 is a partition plate, and 12 is a switch. Box, 12a is the first vertical plane, 1
2b is the second vertical plane, 12c is the third vertical plane, 12d is the fourth vertical plane
Vertical plane, 12e is a flange, 15 is a hood, 17, 1
8 is a rib, 25 is a seal member, 34 is an exhaust heat passage outlet (notch), and 37 is an exhaust heat passage.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 5/00

Claims (1)

(57) [Claims] 1. A partition plate (11) in a casing (1).
A heat exchange chamber (2) and a component storage chamber (3) are formed by partitioning the switch box (1) on the partition plate (11).
An outdoor unit for an air conditioner to which a switch member (2) is attached, wherein an upper surface of the switch box (12) is opened and a sealing member (2) is attached to a top plate (1c) of the casing (1).
5) to contact the casing top plate (1).
also serves as a c) as the lid of the switch box (12)
On the other hand, on the upper surface of the switch box (12),
Exhausted heat from the parts storage room (3) to the heat exchange room (2)
An outlet (34) for the passage (37) is formed, and
When surrounding the heat exchange chamber (2) side of the heat passage outlet (34)
In addition, the sealing portion is attached to the casing top plate (1c).
The upper surface is in contact with the material (25) and the upper and lower sides are open.
A waterproof hood (15),
Inside the horizontal ribs (17) and (18) that intersect each other
An outdoor unit for an air conditioner, wherein the outdoor unit is a meandering passage formed .