JP3139365B2 - 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 the partition plate. For example, in the case of an outdoor unit for an air conditioner in which a compressor is inverter-controlled, high temperature heat is generated during operation. Since the inverter control element is required, the switch box in which the inverter control element is disposed is used. The switch box is required to cool the inverter control element. And the high-temperature air accumulated in the switch box needs to be released to the heat exchange chamber side.

In view of the above demands, in the prior art, the inverter control element is disposed on the back side of the cooling fin formed on the partition plate, while the control board having various operation control elements is mounted on the front of the casing in 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 control board is separated from the ventilation path (in other words, the heat exchange chamber). Cooling performance is reduced,
There have been problems that the size of the switch box surrounding the inverter control element and the control board is increased, the assemblability of the switch box is deteriorated, and the cost is increased.

The present invention has been made in view of the above points, and improves the cooling performance by arranging an inverter control element and a control board integrally and vertically in a switch box having cooling fins in a forward posture. It is another object of the present invention to reduce the size, weight, and cost of the switch box.

[0007]

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,
The switch box 12, straddling the said heat exchange chamber 2 and the equipment housing 3 in the casing 1, cable
A single front side of the placed sideways and the switch box 12, and a cold <br/> retirement fins 16, 16 is located so as to face the heat exchange chamber 2, the cooling fins 16, 16,
An inverter control device 26 which is located on the casing front side generates heat during operation of -, Ke of the inverter control element 26
Pacing arranged a control board 27 having a control element for various operation which is the front direction vertical posture on the front side, the improvement of the cooling performance, to obtain achieving a size reduction, weight reduction and cost reduction of the switch box 12 I have to.

In the basic configuration of the present invention, the cooling fins 16, 16,... Are parallel to a main component of a vertical component and a horizontal component of the cooling air flowing through the portion where the cooling fins 16, 16,. Is preferable because the contact area between the cooling fins 16, 16,... And the cooling air increases, and the cooling effect can be maximized.

[0009] In addition, Keshi of the switch box 12
When the high heat-generating component 31 which is located on the component storage room 3 side and generates high temperature is disposed on the back side of the ring , the high heat-generating component 31 and the control board 27 having poor heat resistance are isolated.
This is preferable in that radiant heat from the high heat generating component 31 does not affect the control board 27 and the like.

In the switch box 12, a first heat exhaust passage 37 for cooling the control board 27 and exhausting heat to the heat exchange chamber 2, and cooling the high heat generating component 31 for the heat exchange. The case where the second heat exhaust passage 36 for exhausting heat to the chamber 2 is formed is preferable in that the control board 27 and the high heat generating component 31 can be effectively cooled.

[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. 3 to 5).

As shown in FIGS. 3 to 5, the switch box 12 has a vertical surface 12a perpendicular to the front surface 1a of the casing, and a side from the rear side end of the first vertical surface 12a. Second vertical plane 12 extending at right angles
The first vertical surface 12a is integrally formed with a flange portion 12c extending laterally at a front end portion of the first vertical surface 12a. The first vertical surface 12a is relatively short,
The second vertical surface 12b is larger than the lateral dimension of the component storage chamber 3. Reference numeral 13 denotes a bottom plate that covers from the lower end of the flange portion 12c to the front side of the second vertical surface 12b.
Reference numeral 14 denotes a flange portion extending forward from a side end of the second vertical surface 12b.

The switch box 12 extends laterally across the heat exchange chamber 2 and the component storage chamber 3 in the casing 1 (ie, the second vertical surface 12b).
(In a posture parallel to the casing front surface 1a). Further, at the position facing the heat exchange chamber 2 in the second vertical plane 12, a large number of cooling fins 16, 16,.
Is provided. The cooling fins 16, 16,... Are the main components of the vertical component and the horizontal component of the cooling air flowing through the portion where the cooling fins 16, 16,. Since it is the front right corner, it is formed so as to be parallel to the vertical component. When the cooling fins 16 are provided below the figure,
Since the main component in the cooling air is a horizontal component, the cooling fins 16, 16,... Are formed to extend in the horizontal direction.

On the heat exchange chamber 2 side of the first vertical surface 12a, 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. The hood 15 has a U-shaped cross section with an open top and bottom, and has a rib 17 protruding from the first vertical surface 12a and an anti-first vertical surface at its middle and lower ends in the vertical direction. Ribs 18 projecting to positions 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,
The water that has entered the heat exchange chamber 2 does not enter the component storage chamber 3 from below the hood 15. The lower portion of the hood 15 is cut obliquely to avoid interference with the fan 6.

As shown in FIGS. 1 and 3, 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. A notch hole 19 for mounting the switch box 12 is formed in the front part thereof (see FIG. 5).

On the other hand, guide rails 21, 22 and 23 for engaging the front and rear edges 19a and 19b of the notch hole 19 of the partition plate 11 are provided on the flange portion 12c and the second vertical surface 12b of the switch box 12. , 24 are attached (see FIG. 3). By doing so, the notch hole edges 19a and 19b are
Because it will be sandwiched between 1,22 and 23,24,
Water does not enter the component storage chamber 3 from the heat exchange chamber 2 side through the engagement portion of both, and the waterproof effect is improved. In addition, a seal member 20 for securing water tightness with the lower edge of the notch 19 is attached to the lower surface of the bottom plate 13 of the switch box 12 (see FIGS. 2 and 4).

The upper end of the partition plate 11, the portion of the flange 12c 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.

On the front surface of the second vertical surface 12b of the switch box 12, the cooling fin 1 is provided.
An inverter control element (for example, a power transistor, a diode, or the like) 26 that generates heat at a high temperature during operation is attached to a position corresponding to 6, 16,. That is, the heat generated in the inverter control element 26 is
The heat is radiated by 6, 16,.

A control board 27 having various operation control elements is directly mounted on the inverter element 26. The control board 27 is parallel and perpendicular to the front surface 1a of the casing 1. Switch box 1
2 are attached to the second vertical surface 12b 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. In addition, 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), serviceability for the control board 27 can be ensured.

On the back side of the second vertical surface 12b in the switch box 12, an electric field capacitor 30,
A reactor 31 and a noise filter 32 are attached, and a terminal block 33 for power supply connection is attached to a lower end of the second vertical surface 12 b via a bracket 40. That is, the reactor 31 that is a high heat-generating component that becomes high temperature (for example, 170 ° C.) during operation has low heat resistance (for example,
(60 to 80 ° C.). The control board 27 is disposed away from the control board 27, so that the influence of the heat generated by the reactor 31 does not reach the control board 27.

Further, a part of the upper end of the first vertical surface 12a of the switch box 12 (ie, a part surrounded by the hood 15) and a part of the upper end of the second vertical surface 12b (ie, the upper end of the arrangement part of the reactor 31) ) Is food 1
5. The cutouts 34 and 35 are lower than the upper end. Here, the notch 34 surrounded by the hood 15 is provided with a heat exhaust passage 36 from the component storage chamber 3 side to the heat exchange chamber 2 side, as described later.
It is the exit of 37.

The first and second vertical surfaces 12
a, 12b and the notch 34 of the first vertical surface 12a allow the air cooled in the control board 27 to pass through the hood 15
A first heat-dissipating passage 37 is formed for guiding to the notch 35 of the second vertical surface 12b and the switch box 1
The second upper space forms a second heat exhaust passage 36 for guiding the air cooled in the reactor 31 to the hood 15. In other words, the operation of the fan 6 causes a negative pressure on the windward side of the fan 6, and the control board 27
Air W ₁ having cooled is sucked through the first heat passage 37 and the hood 15 to the heat exchange chamber 2, reactor 31
Air W ₂ which has cooled the second exhaust heat passage and hood 15
Is sucked into the heat exchange chamber 2 through the heat exchanger (see FIG. 4). Therefore, the reactor 31 having a high temperature and the control board 27 having poor heat resistance are separated from the heat exhaust passages 37 and 3.
6, the cooling performance of the reactor 31 can be ensured, and the thermal influence on the control board 27 can be effectively prevented. Reference numeral 39 denotes an air intake to the component storage chamber 3.

[0026]

According to the present invention, the switch box 1 is provided.
2 is laid over the heat exchange chamber 2 and the component storage chamber 3 partitioned by the partition plate 11 in the casing 1 and
The grayed front side of the placed sideways and the switch box 12, the cooling fins 16, 16 is located so as to face the heat exchange chamber 2, of the cooling fins 16, 16
An inverter control element 26 which generates heat during operation is located on the casing front side, Keshi of the inverter control element 26
Having arranged a control board 27 having various operation control device, which is the front direction vertical posture ring front side, with the inverter control element 26 is effectively cooled by the cooling fins 16, 16, inverter control Since the front and rear width dimensions of the element 26 and the control board 27 can be kept small, there is an excellent effect that the cooling performance can be improved, and the size, weight, and cost of the switch box 12 can be reduced.

Further, since the front-rear width of the switch box 12 can be reduced, a large space can be secured in the rear part of the component storage chamber 3, and there is also an effect that piping connection to the heat exchanger becomes easy.

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

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a view taken in the direction of arrow A in FIG. 3;

[Explanation of symbols]

1 is a casing, 1a is a front surface of 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 flange portion, 15 is a hood, 16 is a cooling fin, 17 and 18 are ribs, 26 is an inverter control element, 27 Is a control board, 31 is a high heat generating component (reactor), 34 and 35 are notches, 36 is a second heat exhaust passage, and 37 is a second heat exhaust passage.

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masafumi Hashimoto 1304 Kanaokacho, Sakai City, Osaka Prefecture Daikin Industries, Ltd. Sakai Works Kanaoka Factory (56) References Japanese Utility Model Reference Sho 64-51124 (JP, U) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) F24F 5/00

Claims (4)

(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).
2) An outdoor unit for an air conditioner to which the switch box (12) is attached, wherein the switch box (12) is attached to the casing (1).
Inside the heat exchange chamber (2) and the component storage chamber (3), and are disposed laterally from the front side of the casing, and the switch box (12) is provided with the heat exchange chamber (2). cooling fins positioned to face (16), (1
6) ... and, said cooling fins (16), (16) ... of Ke
An inverter control element (26) located on the front side of the casing and generating heat during operation;
Air conditioning apparatus outdoor unit, characterized in that a control board (27) having various operation control device, which is the front direction vertical posture on the casing front side. 2. The cooling fins (16), (16)...
Is formed substantially parallel to a main component of a vertical component and a horizontal component of cooling air flowing through a portion where the cooling fins (16), (16),... Are arranged. The outdoor unit for an air conditioner as described in the above. Wherein Keshi said switch box (12)
The heat generating component (31) located at the component storage room (3) side and generating high temperature heat is disposed on the back side of the ring. Outdoor unit for air conditioner. 4. In the switch box (12),
A first heat exhaust passage (37) for cooling the control board (27) and exhausting heat to the heat exchange chamber (2); and a heat exchange chamber (2) for cooling the high heat generating component (31). 2nd heat exhaust
The outdoor unit for an air conditioner according to claim 3, wherein the exhaust heat passage (36) is formed.