JP2000104950A - Outdoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which facilitates cooling and also prevents penetration of rainwater, by providing openings on the blower chamber side of the bottom part of an electrical component box of an outdoor unit of an inverter type air conditioner and in a partition plate of the unit to which a reactor is fitted. SOLUTION: An opening is provided in a piercing manner in the vicinity of a heat sink in the bottom part on the blower chamber side of an electrical component box 3 and a metallic cover is provided at a position where it covers this opening so that an air flow opening is formed. A metallic top-plate cover 16 positioned at the upper part of the electrical component box 3 is fitted inside the upper side of a front cover. On the compressor chamber side near the upper end part of a partition plate 2, a reactor 10 is fixed to the partition plate 2 so that heat is transferred, and an opening part is provided in a piercing manner. This opening part is provided at a position where an orifice of a blower hides it when projection is made radially from the axis of rotation of the blower. Moreover a reactor cover 11 having an opening is provided at the opening part of the partition plate, at a position where the orifice 14 of the blower hides the opening. The reactor cover 11 is constituted of the partition plate 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit of an inverter type air conditioner with a variable compressor speed, which is provided with an opening serving as an air flow opening for improving heat radiation of a heat sink, a reactor, etc., and rainwater from the opening. It relates to prevention of intrusion.

[0002]

2. Description of the Related Art A vertical metal partition plate standing on a bottom plate of an outdoor unit separates a blower room in which a heat exchanger and a blower are installed from a compressor room in which electric components such as a compressor are installed. At the upper end of the partition plate, an electric component box in which a control circuit board assembly and the like are fixed is installed so as to straddle the blower room side and the compressor room side. 2. Description of the Related Art There has been known an electric component box in which a heat sink (heat sink) such as a transistor that generates a high current by flowing a large current to a machine and has an opening formed in an electric component box and faces the blower room side.

It is also known that a compressor, piping and the like are installed in a lower portion on the side of the compressor chamber, and a reactor is fixed to an upper compressor chamber side of a partition plate located between the compressor and an electric component box.

[0004]

Conventionally, a heat sink has been provided through an opening at the bottom of an electric component box to cool the heat using a blower for a heat exchanger. It was also desired to circulate air inside the electric parts box and cool the inside of the electric parts box.However, if an opening is provided at the bottom of the electric parts box on the side of the blower room, rainwater will flow inside the electric parts box by the rotation of the blower. It could not be implemented due to the risk of intrusion.

[0005] Usually, the electric component box is often formed of a resin molded product. This is because, in order to prevent rainwater intrusion, a mounting boss for an internal electric component is easily provided without providing an opening at the bottom portion, and this is for insulation measures with the electric component.

However, a large-capacity capacitor is installed in the internal electric parts, and it cannot be said that there is no danger of puncturing and firing. Even if there is a fire or if the electric parts box melts due to high temperature, it will prevent the spread of fire to other resin molded parts, maintain strength, and prevent electromagnetic noise from electric parts. For this reason, the outside of the electric component box was sometimes covered with a metal plate.

[0007] Further, when the reactor is fixed to the upper compressor chamber side of the partition plate located between the compressor and the electric component box,
In order to promote heat radiation from the reactor, we wanted to make an opening in the partition plate of the reactor mounting part and use the air from the blower, but as mentioned above, this also caused the rainwater to enter the electrical component box by the rotation of the blower. It could not be implemented due to the risk of intrusion.

An object of the present invention is to provide an electric component box and a reactor mounting portion structure in which an opening is provided in a blower room side of a bottom portion of an electric component box and a partition plate on which a reactor is mounted to promote cooling and prevent rainwater from entering. It is intended for.

[0009]

In the outdoor unit of the air conditioner according to the present invention, a blower room and a compressor room are partitioned by a vertical metal partition plate erected on the bottom plate of the outdoor unit. A compressor and the like are arranged at the same time, and an electric component box is installed at the upper end of the partition plate so as to straddle the blower room side and the compressor room side, and a heat sink penetrates the blower room side of the electric component box. In an outdoor unit of an air conditioner in which electric components such as a control circuit board assembly are installed in the compressor room side direction, a compressor room side housing of the outdoor unit and a compressor room side of the electric component box are provided. In addition to providing an air intake port as appropriate, an opening is provided in the vicinity of the heat sink at the bottom of the electric component box on the side of the blower room, and at a position covering the opening when projected from the rotation center of the blower installed in the blower room. A metal cover is provided to serve as an air circulation port Than it is.

An outdoor unit of an air conditioner in which an outer shell (housing) made of a synthetic resin comprising a front cover having an upper surface and a front surface and a rear cover having a rear surface and both side surfaces is attached to the bottom plate. And a top plate portion facing the bottom plate portion of the electric component box, and connected to a periphery of the top plate portion,
A metal top plate cover having a downwardly extending eave portion covering the peripheral side wall of the electric component box is mounted inside the upper surface of the front cover.

Further, a reactor is heat-fixed to the partition plate near the upper end of the partition plate near the compressor chamber, and an opening is formed through the partition plate near the reactor to form an air flow port. It is a thing.

In addition, in the outdoor unit of an air conditioner in which a blower room and a compressor room are partitioned by a vertical metal partition plate erected on the outdoor unit bottom plate, and a compressor and the like are arranged in the compressor room. In addition, an air intake port is appropriately provided in the compressor chamber side housing of the outdoor unit, and a reactor is heat conductively fixed to the partition plate on the compressor chamber side of the partition plate, and an opening is formed in the partition plate near the reactor. No air flow port through the section,
The opening is an orifice of the blower when projected radially from the rotation axis of the blower, and is located at a hidden position, thereby preventing intrusion of rainwater and the like from the blower rotation axis direction.

Further, a reactor cover having an opening is provided on the side of the opening of the partition plate on the side of the blower chamber, and the reactor cover opening is hidden by an orifice of the blower when projected radially from the rotation axis of the blower. Thus, intrusion of rainwater or the like from the rotation axis direction of the blower is prevented.

Further, the reactor plate is formed by cutting and raising the partition plate, squeezing the cut portion, or welding a metal plate separately without using a separate reactor cover. is there.

According to the above configuration, an opening is provided in the vicinity of the heat sink at the bottom of the electric component box on the side of the blower chamber, and the inside of the electric component box can be cooled by the outside air from the air intake. In the past, air could be exhausted from the top of the electrical component box, but could not be exhausted from the bottom of the electrical component box.
The stagnation of the high temperature inside the electric component box can be solved by the opening of the bottom part by drawing air from the blower.

On the other hand, when projected from the center of rotation of the blower installed in the blower room, since a metal cover is provided at a position covering this opening, there is a risk that rainwater will enter the electric component box due to the rotation of the blower. This has been resolved.

Further, the metal cover can be used as a metal plate for covering the outside of the electric component box for the purpose of igniting the resin electric component box, taking measures against high temperature (prevention of burning, maintaining strength) and preventing electromagnetic wave noise. No additional parts are required.

Further, a metal ceiling having a top plate facing the bottom plate of the electric component box, and an eave portion extending downward, covering the peripheral side wall of the electric component box, connected to the periphery of the top plate. Since the plate cover was mounted inside the upper surface of the front cover,
Even if water enters the housing of the outdoor unit, it is prevented from entering the interior of the electrical component box, and the high-temperature air inside the electrical component box is blown through the gap between the eaves of the top cover and the peripheral side wall of the electrical component box. Can be discharged by the invitation of That is, the high temperature inside the electric component box is efficiently cooled by the discharge from the top of the box and the above-described discharge from the bottom of the box.

This top plate cover, in combination with the above-mentioned metal cover for covering the electric component box, serves as a measure to prevent burning of the resin front cover against electric component fire and to prevent electromagnetic wave noise. In addition, since the top cover is mounted inside the upper surface of the front cover, the top cover is not forgotten or closed.

Further, the reactor is fixed to the compressor chamber side near the upper end of the partition plate to penetrate the opening to form an air circulation port, so that high-temperature air generated by the reactor generates heat from the electric component box and the partition plate. No more stagnation in the area surrounded by.

Further, since the reactor is fixed to the partition plate by heat transfer, the partition plate takes away the heat of the reactor and becomes a kind of radiator plate. .

Further, since the reactor is fixed to the partition plate on the side of the compressor chamber by heat transfer, the partition plate is cooled by the heat radiating plate effect, and the opening is formed in the vicinity of the reactor to open the air. Because of the circulation port, the reactor can easily radiate heat from the through-hole, and the high-temperature air is discharged from the opening by the induction of the blower, thereby cooling the reactor efficiently.

Further, since the opening of the partition plate is located at a position hidden by the orifice of the blower when projected radially from the rotation axis of the blower, rainwater does not enter due to the rotation of the blower.

In addition, a reactor cover having an opening at a position hidden by an orifice of the blower when projected radially from the rotation axis of the blower to the blower chamber side of the opening of the partition plate is installed. Therefore, the reactor fixing position can be provided at a position away from the front side of the outdoor unit.

Further, the reactor plate can be formed by cutting and raising the partition plate, squeezing after cutting, or welding a metal plate separately, without using a separate reactor cover.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an outdoor unit of an air conditioner according to the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view for explaining a housing configuration of an outdoor unit according to the present invention. FIG. 2 is a perspective view showing a state in which a front cover 5 constituting the front and top surfaces of the housing is removed from the outdoor unit. FIG. 3A is a front view of FIG. 2 and a part is shown in a cross section. FIG. 3B is a side sectional view of FIG. FIG. 4 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is a top view of the electric component box 3, and FIG. 6 is an electric component box 3 and the reactor 10.
It is the fragmentary sectional view seen from the front of an attachment part.

Referring to FIG. 1, the housing configuration of the outdoor unit will be described. A heat exchanger 4 and a partition plate 2 made of a metal plate are installed on a bottom plate 1 made of a metal plate, and an electric component box 3 of a resin molded product whose outside is covered with a metal plate is provided at the upper end of the partition plate 2 in FIG.
2 is provided so as to extend over the side of the blower room 12 where the heat exchanger 4 is located and the side of the compressor room 13 where the compressor 9 is located as shown in FIG. The rear cover 6 is a resin molded product that forms the rear surface and both side surfaces of the housing, and the front cover 5 is a resin molded product that forms the front surface and the top surface of the housing. The outer body 7 is composed of the rear cover 6 and the front cover 5.

In FIG. 2, FIG. 3 and FIG.
0 denotes a partition plate 2 on the compressor chamber 13 side near the upper end of the partition plate 2.
The fixing portion (iron plate) of the reactor 10 is heat-conductively fixed to a narrowed portion 25 which is squeezed toward the compressor chamber 13 by screws. An opening 24 is provided in the partition plate 2 where the reactor 10 is attached, and the reactor 10 is
Facing the side.

Since the reactor 10 is installed so as to float from the partition plate 2 at the throttle unit 25, high-temperature air is discharged through the opening 24 of the partition plate 2.

The reactor cover 11 is provided on the side of the blower chamber 12 with respect to the opening 24, and the opening 26 is located on the front side with respect to the rear end 27 of the orifice 14 of the blower 8 installed on the front cover 5. Therefore, even if the blower 8 sprays rainwater, the opening 26 of the
There is no danger that rainwater will enter the reactor 10 via.

In this embodiment, the case where the reactor cover 11 is used is shown in FIG. 4 and the like, but the opening 24 of the partition plate 2 is projected radially from the rotation axis of the blower 8 without using the reactor cover 11 separately. If the air blower 8 is located at a position hidden by the orifice 14 of the blower 8, rainwater or the like does not enter due to the rotation of the blower 8.

However, if the reactor cover 11 having the opening 26 at a position hidden by the orifice 14 of the blower 8 when projected radially from the rotation axis of the blower 8,
The opening 24 of the partition plate 2 and thus the fixed position of the reactor 10 can be provided at a position distant from the front side of the outdoor unit.

Further, the reactor plate 11 may be formed by cutting and raising the partition plate 2, cutting and squeezing the partition plate 2 without using the reactor cover 11, or welding the metal plate separately. Can also. FIG. 7 illustrates this example. In this case, since the bottom (metal plate) of the reactor 10 is fixed to the partition plate 2 with screws in close contact with the partition plate 2, the heat of the reactor 10 is further transferred to the partition plate 2 as compared with the fixing method of the reactor 10 in FIG. To further dissipate heat.

Next, a description will be given with reference to FIGS. 2, 3, 5, and 6. FIG. An electric component box 3 is installed at the upper end of the partition plate 2,
A heat sink 17 having a control circuit board assembly 21 on which a capacitor 20 is mounted, a power transistor module 18, and a diode bridge 19 on the back surface is fixed. As shown in FIG. 6, the heat sink 17 has its radiating fins penetrating the bottom of the electric component box 3 on the side of the blower room 12, and is cooled by the blower 8.

Although it depends on the rotational locus of the blower 8 and the positional relationship of the orifice 14, the bottom of the electric component box 3 on which the heat sink 17 is installed is one step higher than the other bottoms. Most of the control circuit board assembly 21 is provided on the compressor room 13 side. Heat sink 17 and control circuit board assembly 2
An opening 28 is provided in the front and rear direction at the bottom where the control circuit board assembly 21 is installed between the two.

The outside of the electric component box 3 is covered with the metal plate 15. In particular, in the vicinity of the opening 28, an opening 29 is provided by being cut along the opening 28 and then squeezed.
Combined with 8, it becomes an air circulation port. Since the opening 28 is covered with the metal plate 15, there is no danger of rainwater entering the inside of the electric component box 3 through the opening 28 of the electric component box 3 even if rainwater is sprayed by the rotation of the blower 8.

A terminal plate 22 is provided on the metal plate 15 at the end of the electric component box 3 on the side of the compressor chamber 13, and an opening 30 is provided on the side of the housing for wiring connection from the indoor unit. A two-way valve / three-way valve 31 for connecting a refrigerant pipe from the indoor unit is provided at a lower portion of the side surface, and an opening 32 is provided for convenience of this installation.

As shown in FIG. 2, an opening 33 is also provided on the peripheral side wall of the electric component box 3 for wiring connection with electric components inside the electric component box 3. Further, a connection portion cover 34 which is a resin molded product for covering the wiring connection portion and the refrigerant pipe connection portion is provided.

The outside air is sucked through the openings 33 through the openings 30 and 31, and the high-temperature air is discharged from the openings 28 and 29 at the bottom of the electric component box 3 toward the blower room 12, thereby promoting heat radiation of the reactor 10.

Next, the vicinity of the top plate cover 16 will be described with reference to FIG. Inside the top surface of the front cover 5, a top plate cover 16 is installed on the top surface with screws. Top plate cover 1
As shown in FIG. 3, there is a gap between the electric component 6 and the electric component box 3, and the heat generated from the electric component is not
The air is cooled by the outside air sucked from the air blower 2, and is discharged to the blower room 12 side by the air blow of the blower 8.

The top plate cover 16 is made of a metal such as an iron plate, and together with the metal plate 15 such as an iron plate that covers the outside of the electric component box 3, an electric component such as the capacitor 20 ignites or becomes abnormally hot. This is also for the purpose of preventing the front cover 5 and the electric component box 3 which are resin molded products from burning, maintaining the strength during melting and softening, and also has the purpose of preventing electromagnetic wave noise.

Further, since the top plate cover 16 is connected to the peripheral edge of the top plate portion and has an eave portion extending downward and covering the peripheral side wall of the electric component box 3, the top plate cover 16 is sucked through the openings 30 and 32 on the side surface of the housing. Since outside air flows along the eaves and the top panel of the top panel cover 16, it also has the effect of actively cooling the upper part of the electric component box 3.

The heat radiation of the compressor chamber 13 and the electric component box 3 in the above configuration will be described. In the compressor room 13, the compressor 9 and the reactor 10 generate heat, and generate heat from the power transistor module 18, the diode bridge 19, and the heat sink 17 as a heat radiating plate in the electric component box 3.

The outside air sucked from the opening 32 on the side surface of the outdoor unit housing becomes high temperature while cooling the compressor 9 and the reactor 10 and rises upward. A part is discharged through the upper part of the electric component box 3, and a part is discharged to the blower chamber 12 side through the opening 24 of the reactor 10 mounting portion of the partition plate 2 and the opening 26 of the reactor cover 11.

The outside air is also sucked from the opening 30 on the side of the housing, through the opening 28 above the electric component box 3 and the bottom of the electric component box 3, and partially through the opening of the partition plate 2 at the mounting portion of the reactor 10. The air is discharged to the blower room 12 via the air blower 24.

The opening 24 of the partition plate 2 at the mounting portion of the reactor 10 prevents the high-temperature air from stagnating at the lower part of the electric component box 3 and fresh air is discharged by the opening 24 so that the openings 30 and 32 on the side of the housing. More sucked. The electric component box 3 can be cooled by fresh air accordingly.

Since air is discharged to the blower room 12 through the opening 28 at the bottom of the electric component box 3, high-temperature air does not stagnate inside the electric component box 3, and the control circuit board set by the heat of the heat sink 17. The influence on the product 21 can be reduced. Since the radiating fins of the heat sink 17 penetrate through the opening at the bottom of the electric component box 3, they are cooled by the blower 8, but the aluminum heat sink 17 also faces the inside of the electric component box 3. Therefore, the effect of the opening 28 is large.

Since the air is drawn toward the rotation center of the blower 8, the opening 28 at the bottom of the electric component box 3 is effective. Conversely, there is a possibility that rainwater or the like may enter due to the rotation of the blower 8 from the direction of the rotation center of the blower 8, but as shown in FIG. 3A, the metal plate 15 prevents this.

The present invention is not limited to the above embodiment.

[0050]

According to the first aspect of the present invention, in the first aspect, an opening is provided in the vicinity of the heat sink at the bottom of the electric component box on the side of the blower chamber, and the inside of the electric component box can be cooled by the outside air from the air intake. When projecting from the center of rotation of the blower installed in the blower room without stagnation of high temperature inside the electrical parts box, a metal cover is provided at a position covering this opening, so rainwater is generated by rotation of the blower. There is no risk of intrusion into the inside of the parts box.

Further, the metal cover can be used as a metal plate for covering the outside of the electric component box in order to prevent ignition of the electric component box made of resin, measures against high temperature (prevention of burning and maintaining strength), and measures against electromagnetic wave noise.

According to a second aspect of the present invention, there is provided a top plate portion facing the bottom plate portion of the electric component box, and an eave portion connected to the peripheral edge of the top plate portion and extending downward to cover the peripheral side wall of the electric component box. Since the metal top plate cover is mounted inside the upper surface of the front cover, even if water enters inside the housing of the outdoor unit, it is prevented from entering the inside of the electric component box, and the eaves of the top plate cover are protected. The high-temperature air inside the electric component box can be discharged from the gap between the part and the peripheral side wall of the electric component box by the induction of the blower. That is, the high temperature inside the electric component box is efficiently cooled by the discharge from the top of the box and the above-described discharge from the bottom of the box.

This top plate cover, in combination with the above-described metal cover that covers the electric component box, serves as a measure to prevent the burning of the resin front cover against electric component fire and to prevent electromagnetic noise. In addition, since the top cover is mounted inside the upper surface of the front cover, the top cover is not forgotten or closed.

According to the third aspect of the present invention, the reactor is further fixed to the compressor chamber near the upper end of the partition plate, and the opening is formed through the opening to form an air flow port. The stagnation does not occur in the part surrounded by the parts box and the partition plate.

Further, since the reactor is fixed to the partition plate by heat conduction, the partition plate takes away the heat of the reactor and becomes a kind of heat radiating plate. .

According to the fourth aspect of the present invention, the reactor is heat-conductively fixed to the partition plate on the compressor chamber side of the partition plate, so that the partition plate is cooled by the heat radiating plate effect and the opening penetrates the vicinity of the reactor. Since the reactor is provided as an air circulation port, the reactor easily radiates heat from the opening formed therethrough, and high-temperature air is discharged from the opening by the induction of the blower, thereby cooling the reactor efficiently.

Further, since the opening of the partition plate is in a position hidden by the orifice of the blower when projected radially from the rotation axis of the blower, rainwater or the like does not enter due to the rotation of the blower.

According to the fifth aspect of the present invention, the reactor cover having the opening at a position hidden by the orifice of the blower when projected radially from the rotation axis of the blower to the blower chamber side of the opening of the partition plate is provided. The opening of the partition plate and thus the reactor fixing position can be provided at a position further away from the front side of the outdoor unit.

According to the sixth aspect of the present invention, the partition plate is cut and raised without using a separate reactor cover, and the diaphragm is squeezed after cutting.
Alternatively, the reactor plate may be constituted by the partition plate itself by welding a metal plate separately.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view for explaining a housing configuration of an outdoor unit according to the present invention.

FIG. 2 is a perspective view of the outdoor unit according to the present invention in a state where a front cover 5 constituting a front surface and a top surface of a housing is removed.

FIG. 3 (a) is a front view of FIG. 2 according to the present invention, a part of which is shown in cross section. (B) is a side sectional view of FIG. 2.

FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3A according to the present invention, and is a diagram for explaining a mounting state of a reactor 10 and a reactor cover 11.

FIG. 5 is a top view of the electric component box 3 according to the present invention.

FIG. 6 is a partial sectional view of the electric component box 3 and the reactor 10 mounting portion according to the present invention as viewed from the front.

FIG. 7 is a cross-sectional view of a principal part corresponding to FIG. 4 of another embodiment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom plate 2 Partition plate 3 Electric parts box 5 Front cover 7 Outer trunk 8 Blower 9 Compressor 10 Reactor 11 Reactor cover 12 Blower room 13 Compressor room 14 Orifice 15 (of the blower 8) 15 (covers the outside of the electric parts box 3) Metal plate 16 Top cover 17 Heat sink 24 Opening (of partition plate 2) 26 Opening (of reactor cover 11) 28 Opening (at the bottom of electrical component box 3) 29 Opening (of metal plate 15) 30 (On the side of the housing) Opening 32 (in the vicinity of the two-way valve / three-way valve 31) 33 Opening (on the side wall of the electric component box 3)

Claims (6)

[Claims] 1. A blower room and a compressor room are partitioned by a vertical metal partition plate erected on an outdoor unit bottom plate, and a compressor and the like are arranged in the compressor room. An electric component box is installed so as to straddle the blower room side and the compressor room side, and a heat sink is penetrated in the blower room side of the electric component box, and a control circuit board assembly or the like is directed in the compressor room side. In the outdoor unit of the air conditioner in which the electric parts are installed, an air intake port is appropriately provided in the compressor room side housing of the outdoor unit and the compressor room side of the electric parts box, and the blower of the electric parts box is provided. An opening is provided in the vicinity of the heat sink at the bottom of the chamber side, and a metal cover is provided at a position covering the opening when projected from the rotation center of the blower installed in the blower chamber to form an air circulation port. The outdoor unit of the air conditioner. 2. An outdoor unit of an air conditioner in which a synthetic resin outer body (housing) comprising a front cover having an upper surface and a front surface and a rear cover having a rear surface and both side surfaces is attached to the bottom plate. Further, a metal top plate having a top plate portion facing the bottom plate portion of the electric component box, and an eave portion connected to the periphery of the top plate portion and extending downward to cover the peripheral side wall of the electric component box. The outdoor unit of an air conditioner according to claim 1, wherein a cover is mounted inside an upper surface of the front cover. 3. The partition plate is characterized in that a reactor is heat-conductively fixed to the partition plate near the upper end of the partition plate on the compressor chamber side, and an opening is formed through the partition plate near the reactor. The outdoor unit of the air conditioner according to claim 1 or 2. 4. An outdoor unit of an air conditioner in which a blower room and a compressor room are partitioned by a vertical metal partition plate erected on a bottom plate of the outdoor unit, and a compressor and the like are arranged in the compressor room. In addition, an air intake port is appropriately provided in the compressor chamber side housing of the outdoor unit, and a reactor is heat conductively fixed to the partition plate on the compressor chamber side of the partition plate, and an opening is formed in the partition plate near the reactor. An outdoor unit of the air conditioner, wherein the opening is located at a position hidden by an orifice of the blower when projected radially from a rotation axis of the blower. 5. A reactor cover having an opening on the side of the blower chamber at an opening of the partition plate, wherein the reactor cover opening is hidden by an orifice of the blower when projected radially from a rotation axis of the blower. The outdoor unit of an air conditioner according to claim 4, wherein: 6. The outdoor unit of an air conditioner according to claim 5, wherein the reactor cover is constituted by a partition plate.