JP2993420B2 - Switch box mounting structure for 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 a switch box mounting structure for 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 room in which the components are disposed via a partition plate extending in the front-rear direction of the casing (for example, see Japanese Utility Model Application Laid-Open No. 1-116331). The storage was arranged.

[0003]

In the ordinary switch box mounting structure, it is sufficient to hook the switch box on the partition plate. However, for example, an air conditioner of the type in which a compressor is inverter-controlled. In the case of an outdoor unit for use, since an inverter control element which generates heat at a high temperature during operation is required, a switch box in which the inverter control element is disposed needs to cool the inverter control element. It must be exposed to the ventilation passage (that is, the heat exchange chamber side provided with the fan) which may cause such a problem, and it is necessary to release the high-temperature air accumulated in the switch box to the heat exchange chamber side.

[0004] In order to satisfy the above restrictions, waterproofing between the switch box and the partition plate is a major issue.

[0005] However, when a conventional mounting structure in which the switch box is hooked on the partition plate is employed, it is necessary to use a seal member to prevent water from entering from both mounting portions.

[0006] The present invention has been made in view of the above points, and by devising a structure for attaching a switch box to a partition plate, it is possible to ensure waterproofness by using a minimum of seal members. It is intended to be.

[0007]

According to the basic structure of the present invention, as a means for solving the above-mentioned problems, a casing 1 is divided into a heat exchange chamber 2 and a parts storage chamber 3 by a partition plate 11. In a switch box mounting structure for an outdoor unit for an air conditioner to which the switch box 12 is mounted, a notch hole 19 for mounting the switch box 12 is formed in the partition plate 11, and the notch holes are formed on both sides of the switch box 12. Vertical guide rails 21, 22 and 23, 24 are provided, respectively, in which the opposing rims 19a, 19b of 19 are slid and engaged, so that the switch box 12 can be easily mounted and also has waterproofness. I am trying to get it.

In the basic configuration of the present invention, one of the guide rails 21, 22, and 23, 24 has substantially the same length as the notch hole edges 19a, 19b, and the other side has a shorter length. Is preferable in that the notched hole edges 19a, 19b can be easily slidably engaged with the guide rails 21, 22, 23, 24 while using the longer guide rails 21, 23 as guides. If the guide piece 40 for guiding the notch hole edges 19a, 19b is integrally extended at the shorter lower end of the guide rails 21, 22, 23, 24, the guide rails 21 of the notch hole edges 19a, 19b are provided. , 22 and 23, 24 can be more reliably engaged.

[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 vertical surface 12a perpendicular to the front surface 1a of the casing, and a lateral surface extending from the rear end of the first vertical surface 12a. Second vertical plane 12 extending at right angles
b, a third vertical surface 12c extending perpendicularly forward from a side end of the second vertical surface 12b, and a third vertical surface 1c.
4th extending perpendicularly to the side from the front end of 2c
The first vertical surface 12a.
A flange portion 12e extending laterally is integrally extended at a front end portion. Reference numeral 13 denotes the flange portion 12e.
A bottom plate 14 covers from the lower end of the second vertical surface 12b to the center of the lower end of the second vertical surface 12b. Reference numeral 14 denotes 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 an exhaust port for exhaust heat extraction, and a number of horizontal cooling fins 16, 16... Have been.

The hood 15 has a U-shaped cross section, and has a first vertical surface 1 at an intermediate portion and a lower end in the vertical direction.
A rib 17 protruding from the side 2a and a rib 18 protruding from a side opposite to the first vertical plane to a position overlapping with the rib 17
Are formed respectively. By doing so, the inside of the hood 15 becomes a meandering passage formed by the ribs 17 and 18, and the water that has entered the heat exchange chamber 2 receives the water from the hood 1.
5 does not enter the component storage room 3 side.

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 has a central portion recessed toward the heat exchange chamber 2 so as to avoid interference with the compressor 7 disposed in the component storage chamber 3. 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 and 22 for slidingly engaging the front and rear edges 19a and 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. 2
3, 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.

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. Moreover, in the present embodiment, a guide piece 40 for guiding the notch hole edges 19a, 19b is integrally provided at the lower ends of the shorter guide rails 22, 24. By doing so, the notch hole edges 19a, 1
The sliding engagement of the 9b with the guide rails 21, 22 and 23, 24 can be performed more reliably.

On the lower surface of the bottom plate 13 of the switch box 12, a seal member 20 for securing water tightness with the lower edge of the cutout hole 19 is attached (see FIGS. 2 and 5). It is also possible to omit the sealing member 20, in which case the bottom plate 1 of the switch box 12
If a guide rail 41 (shown by a dashed line in FIG. 5) which is continuous with the guide rails 21 and 23 is provided on the lower surface of the device 3, a sufficient waterproof function can be obtained.

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. Reference numeral 25 denotes a seal member for ensuring watertightness with the casing top plate 1c. That is,
The casing top plate 1c also serves as the lid of the switch box 12. Reference numeral 25 denotes a seal member for ensuring watertightness with 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 switched perpendicularly to the front surface of the casing 1 and in a vertical posture. It is attached to the first vertical surface 12a of the box 12 at appropriate locations via fasteners 38, 38,. In this way, the inverter control element 26 and the control board 27 are arranged in the switch box 12 with the width dimension kept as small as possible, and the cooling performance of the inverter control element 26 is ensured. , Switch box 1
This is extremely advantageous in reducing the size, weight, and cost of (2). Various operation control elements are provided on the control board 27, and elements having a high service frequency (for example, light emitting diodes 28, connectors 29, etc.) are concentrated on the front side. In this case, since the service lid (not shown) is provided on the front surface 1a of the casing (specifically, the front surface of the component storage chamber 3), the control board 27 is moved relative to the front surface of the casing 1. Even if it arrange | positions orthogonally, 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. The reactor 31, which is a high electric power generating heat component (eg, 170 ° C.) during operation, is disposed away from the control board 27 which is a low heat generating electric component having low heat resistance (eg, 60 to 80 ° C.). , This way,
The influence of the heat generation of 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,
Between the notches 34, 35, a wind guide member 36 having a U-shaped cross section is provided.
Has been erected. 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. The heat guide member 36 constitutes a second heat exhaust passage for cooling the reactor 31 and guiding air 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 sucked into the heat exchange chamber 2 through the first exhaust heat passage 37 and the hood 15 from the point where the windward side has a negative pressure. The air W ₂ (see FIGS. 2 and 5) that has cooled the reactor 31 is sucked into the heat exchange chamber 2 via the second exhaust heat passage (that is, the baffle member 36) and the hood 15. That is, the first and second exhaust heat passages 3
Reference numerals 7 and 36 are to communicate with the heat exchange chamber 2 via the hood 15 which is one discharge port.

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 cutout portion 34 is larger than the cross-sectional areas of the notch 5 and the air guide passage 36. Reference numeral 39 denotes an air intake to the component storage chamber 3.

[0030]

According to the present invention, a notch hole 19 for mounting the switch box 12 is formed in the partition plate 11 for partitioning the inside of the casing 1 into the heat exchange chamber 2 and the component storage chamber 3, and the switch box 12 is provided. Guide rails 21, 22 and 2 in which the opposite edges 19a and 19b of the notch hole 19 are slidably engaged on both sides of the
3 and 24, respectively, and the notch edges 19a, 19
Since the switch box 12 is mounted by sliding engagement between the guide box 21 and the guide rails 21, 22, and 23, 24, an excellent effect that the switch box 12 can be easily mounted and the prevention property can be secured. There is.

[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 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.

FIG. 6 is a front view of a partition plate in the outdoor unit for an air conditioner according to the embodiment of the present invention.

[Explanation of symbols]

1 is a casing, 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, 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, 19 is a notch hole, 19a and 19b are notch hole edges, 21, 22, 23, and 24 are guide rails, and 40 is a guide piece.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-318110 (JP, A) JP-A-7-293940 (JP, A) JP-A-3-152324 (JP, A) 26026 (JP, U) Japanese Utility Model 1-116331 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F24F 5/00

Claims (3)

(57) [Claims] 1. A heat exchange chamber (2) in a casing (1).
A switch box mounting structure for an outdoor unit for an air conditioner, wherein a switch box (12) is mounted on a partition plate (11) partitioned into a partition and a component storage room (3), wherein the switch is mounted on the partition plate (11). A notch hole (19) for mounting the box (12) is formed, and opposite edges (19a) and (19b) of the notch hole (19) slide on both sides of the switch box (12). Vertical guide rails (21) to be engaged,
A switch box mounting structure in an outdoor unit for an air conditioner, wherein (22), (23) and (24) are provided. 2. One of the guide rails (21), (22) and (23), (24) has substantially the same length as the notch hole edges (19a), (19b), and the other side has a shorter length. The switch box mounting structure for an outdoor unit for an air conditioner according to claim 1, wherein the switch box is mounted. 3. A guide piece (40) for guiding said notch hole edges (19a) and (19b) at a shorter lower end of said guide rails (21) and (22) and (23) and (24). 3. The outdoor unit for an air conditioner according to claim 2, wherein the components are integrally extended.