JP2015161475A - Outdoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit of an air conditioner capable of stably fixing an exhaust air duct at a position which does not become an obstacle of a draft air passage.SOLUTION: The inside of an outdoor unit 1 body is partitioned into a machinery chamber 4 and a blower chamber 5 by a partition plate 3 and a heat exchanger side plate 30. In the blower chamber 5, a blower fan 51 is arranged in the center and a heat exchanger 50 is arranged on a back surface side. In the machinery chamber 4, an electrical component unit 6 is arranged at an upper part. A square cylindrical exhaust air duct 7 is arranged at an upper surface of the heat exchanger 50. The exhaust air duct 7 forms one or more vent holes 72 on the surface on the blower fan 51 side by extending an opening part 70 to the machinery chamber 4. The surface on which the vent holes 72 are formed is made to be a front surface 71, the surface facing the front surface 71 is made to be a back surface 75 and the heat exchanger 50 is held by a pair of mounting plates 73 extending downward from the front surface 71 and the back surface 75 respectively.

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to a structure that improves a heat dissipation effect in an electrical component box.

  Conventionally, an air conditioner installed in a building such as a condominium or a general house is composed of an outdoor unit installed outdoors and an indoor unit installed on an indoor ceiling or wall. What is connected with refrigerant | coolant piping is known. The interior of the outdoor unit is divided into a blower chamber in which a heat exchanger and a blower fan are installed, and a machine room in which a compressor, an accumulator, and the like are installed, by a partition plate attached to a bottom plate that constitutes the casing of the outdoor unit. It is partitioned. In the machine room, a power supply unit that supplies driving power to devices such as a compressor and a blower fan, and an electrical component box equipped with electrical components such as a control board that controls the operation of the outdoor unit are located above the compressor and accumulator. Has been placed.

  The electrical component is a component that generates heat. In order to cool the electrical component, the machine room has an air introduction hole for taking in air, and an exhaust hole for exhausting the taken air to the blower chamber side. A water shielding lid is attached to the blower chamber side, and rain or drain water drops from the exhaust hole of the electrical component box into the electrical component box while exhausting the air exhausted from the exhaust hole of the electrical component box to the blower chamber. Prevents intrusion. (For example, refer to Patent Document 1).

However, with recent outdoor units, the amount of heat generated by the electrical components increases as performance increases, and the cooling effect of the electrical components is not sufficient only by the exhaust holes provided in the partition plate.
Therefore, an exhaust duct connected to the exhaust hole is provided, and the opening end of the exhaust duct is extended to a negative pressure region generated in the blower chamber when the blower fan is driven. In order to promote, there is a thing in which more air is taken in than the hole for air introduction. (For example, refer to Patent Document 2).

JP2012-159225A JP 2012-137229 A

However, since the exhaust duct is disposed on the air passage connecting the heat exchanger, the air blowing fan, and the air outlet, the air duct becomes an obstacle to the air passage, and the air duct protrudes from the air passage and is suspended in the air. It can also be predicted that vibration will occur and cause noise due to the wind generated by the fan.
Then, the subject of this invention is providing the outdoor unit of the air conditioner which improves a thermal radiation effect by fixing an exhaust duct stably in the position which does not become an obstruction of a ventilation path.

In order to achieve the above-described object, the present invention divides the interior of an outdoor unit into a machine room and a blower room by a partition plate and a heat exchanger side plate, and heat exchange is performed in the middle of the blower room and a blower fan in the center. In the outdoor unit of an air conditioner in which an electrical component unit is disposed in the upper part of the machine room,
A square tube-shaped exhaust duct is disposed on the upper surface of the heat exchanger, and the exhaust duct extends to an opening of the machine room to form one or more ventilation holes on the surface on the side of the blower fan, The surface on which the air holes are formed is a front surface, the surface facing the front surface is a back surface, and the heat exchanger is sandwiched between a pair of mounting plates extending downward from the front surface and the back surface.

  The exhaust duct may be pressed by a top plate that covers the ceiling of the outdoor unit main body.

According to the present invention, a rectangular tube-shaped exhaust duct is disposed on the upper surface of the heat exchanger of the outdoor unit of the air conditioner, and the exhaust duct extends the opening of the tube over the heat exchanger side plate to the machine room. One or more ventilation holes are provided on the front surface of the blower fan side, and the heat exchanger is sandwiched between a pair of mounting plates extending downward from the front and rear surfaces of the exhaust duct. The air in the electrical component box can be circulated from the air, and the air exhausted from the vent hole becomes a flow with a high wind speed by the induction of the wind passing through the heat exchanger below the vent hole. Can be efficiently cooled.
Moreover, it is not obstructed by the air passage because it is arranged at a position other than the air passage for the air taken from the heat exchanger on the upper surface of the heat exchanger, and is sandwiched between the pair of mounting plates on the heat exchanger. Thus, it is possible to provide an outdoor unit of an air conditioner that is stably fixed and does not generate noise due to vibration.

It is a front view of the outdoor unit by this invention. It is a figure which shows the internal mechanism seen from the back upper surface of the outdoor unit by this invention. It is the top view which removed the top plate of the outdoor unit by this invention. It is the figure which removed the top plate of the outdoor unit by this invention, and was seen from the front upper direction. It is a figure which shows typically the longitudinal cross-section of the exhaust duct vicinity of the outdoor unit by this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings. In addition, a present Example is only an Example and embodiment of this invention is not limited to this invention.

  The outdoor unit of an air conditioner according to the present invention is installed in a commercial facility or the like outdoors, and is used for a large indoor unit or a large air conditioner connected to two or three indoor units via a refrigerant pipe. Is.

In the outdoor unit 1, as shown in FIGS. 1 and 2, the outer trunk 10 constituting the outer shell has a substantially rectangular parallelepiped shape, and the base 11 and the front panel 12 erected on the base 11 can be removed at the time of installation or maintenance. It consists of a maintenance panel 13 and a rear panel 21, and a top panel 14 that covers the ceiling of the front panel 12, the maintenance panel 13, and the rear panel 21. These are formed by pressing a steel plate material.
The front panel 12 has an air outlet 15 for blowing out air blown from a blower fan 51 described later, and the air outlet 15 is covered with a fan guard 16.
The rear panel 21 is provided with an intake hole 17 for taking outside air into a machine room 4 to be described later at a position below the center.

In the following, in FIG. 1, the surface with the front panel 12 and the maintenance panel 13 is defined as the front surface, the side surface on the front panel 12 side when viewed from the front surface is the left side surface, and the side surface with the maintenance panel 13 is the right side surface. 2, the surface of the rear panel 21 having the intake holes 17 will be described as the back surface.
Accordingly, the maintenance panel 13 covers from the front side to a part of the right side, the back panel 21 abuts the maintenance panel 13 on the right side and covers a part of the back side, and although not shown, the front panel 12 is the front side of the left side. The left corner and the back corner are supported by the column 18.

  As shown in FIGS. 2 and 3, the inside of the outer body 10 is erected on the base 11, the partition plate 3 having one side fixed to the front panel 12 and having a height up to the top plate 14, and the base 11. Then, the machine room 4 and the blower room 5 are partitioned by a heat exchanger side plate 30 having one side fixed to the partition plate 3 and the other side fixed to the back panel 21.

As shown in FIGS. 2 to 4, a heat exchanger 50 bent in an L shape from the left side surface to the back surface is disposed in the blower chamber 5 so as to be exposed to the suction port 19 on the left side surface and the back surface. . The heat exchanger 50 includes fins 501 arranged in parallel and a plurality of refrigerant tubes 502 penetrating the fins 501. The upper surface of the heat exchanger 50 becomes a flat surface by the fins 501 arranged in parallel, and receives the exhaust duct 7 described later on the upper surface. The heat exchanger 50 is supported by the heat exchanger side plate 30 erected on the base 11 and fixed to the base 11.
The refrigerant pipe 502 of the heat exchanger 50 penetrates the heat exchanger side plate 30, and the penetrating refrigerant pipe 502 is connected by a path pipe 503.

In addition, a fan motor (not shown) is fixed to a motor mounting base 53 erected on the base 11 in front of the heat exchanger 50 at the center in the blower chamber 5, and the fan is positioned at a position facing the air outlet 15 of the front panel 12. A blower fan 51 is pivotally supported on the shaft of the motor. The upper end of the motor mount 53 is fixed to the upper motor mount 54, and the upper motor mount 54 is fixed across the upper end of the front panel 12 and the upper end of the heat exchanger 50.
A bell mouth 20 that guides air is formed integrally with the front panel 12 at the air outlet 15 of the front panel 12.

  With the above configuration, the air passage 55 that connects the suction port 19, the heat exchanger 50, the blower fan 51, and the blower outlet 15 is formed, and the air sucked from the suction port 19 by the rotation of the blower fan 51 is the heat exchanger 50. After the heat exchange with the refrigerant in FIG.

In the machine room 4, as shown in FIGS. 2 to 4, a compressor 40 and an accumulator 41 are attached on the base 11, and the electrical component unit 6 is disposed on the upper part of the machine room 4. The electrical component unit 6 includes various electrical components 60 provided on the back side of the maintenance panel 13 and the surface of the partition plate 3 on the machine room 4 side. The electrical component 60 includes a main control board 61 on which various electronic parts for controlling the compressor 40 and connected indoor units are mounted on the maintenance panel 13 side, and an inverter board 62 disposed on the side surface of the partition plate 3. There are a power module 63 disposed on the inverter board 62, a choke coil 64 disposed on the back side of the partition plate 3, and the like.
The upper surface of the electrical component unit 6 is covered with a lid-shaped electrical component unit lid 65. A seal member (not shown) is integrally attached to the inside of the electrical component unit lid 65 to prevent rainwater from entering the electrical component unit 6.

  The electrical component 60 has many components that generate heat, and the inverter board 62 includes a heat sink 66. The heat sink 66 is disposed in the blower passage 55 from an opening (not shown) provided in the partition plate 3 so as to face the blower chamber 5 side. A part of the outside air guided to 51 and introduced through the heat exchanger 50 hits the heat sink 66, thereby cooling the inverter board 62.

In order to cool the electric component 60 that generates heat including the inverter board 62, an exhaust hole 31 that discharges heat in the electric component unit 6 to the blower chamber 5 side is provided on the side surface of the partition plate 3 next to the power module 63. ing. A box-shaped impermeable lid 67 that prevents intrusion of rainwater or drain water from the exhaust hole 31 into the electrical component unit 6 is provided on the blower chamber 5 side of the exhaust hole 31.
As shown in FIG. 2, the heat generated from the electrical component 60 is guided to the outside air taken in from the intake holes 17 provided in the rear panel 21 by the rotation of the blower fan 51, and passes through the water shielding cover 67 from the exhaust holes 31. 5 is exhausted.

  However, as the performance of the air conditioner increases, the amount of heat generated by the electrical component 60 also increases. As a result, it is not possible to obtain a sufficient cooling effect of the electrical component 60 using only the exhaust holes 31 provided in the partition plate 3. Therefore, the outdoor unit 1 is provided with an exhaust duct 7 in addition to the exhaust hole 31 as shown in FIGS.

  On the flat upper surface of the heat exchanger 50 in the blower chamber 5, there is a wind shield member 52 shaped in an L shape of the heat exchanger 50 from the left side surface of the heat exchanger 50 to the lower side of the upper motor mounting base 54 on the rear surface. Is provided. And the exhaust duct 7 is provided in the upper surface of the heat exchanger 50 in which the wind-shielding member 52 is not provided.

The exhaust duct 7 is a bottomed cylindrical duct made of resin, and the cylindrical shape is a rectangular cylinder in the embodiment, and is arranged with the rectangular cylinder lying down, and the bottom surface of the rectangular cylinder is brought into contact with the wind shielding member 52. The opening 70 on the opposite side of the bottom surface is extended to the machine room 4 on the heat exchanger side plate 30. Further, the exhaust duct 7 may have a cylindrical shape without a bottom, and the wind shielding member 52 may be in close contact with the bottom surface.
The height of the heat exchanger side plate 30 and the heat exchanger 50 is lower than the partition plate 3 having a height up to the top plate 14, so that the opening 70 of the exhaust duct 7 can be accommodated in the step portion. Yes.

The exhaust duct 7 has a vent hole 72 formed on the surface of the square tube on the side of the blower fan 51 toward a negative pressure region generated by the rotation of the blower fan 51. The ventilation hole 72 is composed of one or more holes arranged in parallel to the surface on the air blowing fan 51 side. The surface on which the air holes 72 are formed is referred to as a front surface 71, and the opposite surface is referred to as a back surface 75.
As a result, the heat generated from the electrical component 60 is caused by the flow of the air S that is exhausted from the opening 72 of the exhaust duct 7 through the exhaust duct 7 through the exhaust duct 7 to the blower chamber 5 by the rotation of the blower fan 51. Can be led to exhaust.

A plurality of air holes 72 are provided toward the negative pressure region generated by the rotation of the blower fan 51 by making use of the length of the exhaust duct 7, so that the air S drawn from the plurality of air holes 72 to the negative pressure region is provided. Can make a flow.
Further, since there is the wind T passing through the heat exchanger 50 below the vent hole 72, the air S flowing from the vent hole 72 has a wind speed due to the attraction of the wind T passing through the heat exchanger 50 by the rotation of the blower fan 51. Can make a fast flow. The air S flowing through the vent hole 72 becomes a flow having a high wind speed, so that the heat in the electrical component unit 6 can be efficiently exhausted and the electrical component 60 can be cooled.

The exhaust duct 7 is provided with a mounting piece 74 extending downward from the opening 70. The attachment piece 74 extends from the lower end of the opening 70 along the heat exchanger side plate 30 and has a screw insertion hole. Further, as shown in FIG. 5, the exhaust duct 7 includes a pair of attachment plates 73 that extend downward from the lower ends of the front surface 71 and the back surface 75. 2 and 4, the pair of mounting plates 73 are on the wind shielding member 52 side of the exhaust duct 7, and extend downward from the front surface 71 below the vent hole 72 and are opposed to the vent hole 72. It has a length that extends downward from 75, does not hinder the wind T passing through the heat exchanger 50, and can be stably fixed.
The exhaust duct 7 can be stably fixed by fixing the mounting piece 74 to the heat exchanger side plate 30 using screws and holding the mounting piece 74 on the heat exchanger 50 by a pair of mounting plates 73.

Furthermore, the exhaust duct 7 can be prevented from being displaced from the heat exchanger 50 or caused by ventilation due to being pressed by the top plate 14.
In addition, when there is a margin between the exhaust duct 7 and the top plate 14, a wind shielding member 52 may be further provided on the exhaust duct 7.

  According to the outdoor unit 1 described above, the exhaust duct 7 is arranged at a position on the upper surface of the heat exchanger 50 so as not to contact the air blowing path 55 taken from the heat exchanger 50. The heat exchanger 50 is sandwiched between the pair of mounting plates 73 of the exhaust duct 7 so that the exhaust duct 7 can be stably fixed to the upper surface of the heat exchanger 50. Further, since the exhaust duct 7 does not hit the wind generated by the blower fan 51, no noise is generated by vibration.

  Further, since the opening 70 is provided on the heat exchanger side plate 30, even if water enters from the vent hole 72, it flows down onto the refrigerant pipe 502 of the heat exchanger 50. There is no impact and no structure for water shielding is required.

  Furthermore, since heat can be radiated from the two places of the exhaust duct 7 and the exhaust hole 31, the heat in the electrical component unit 6 can be more efficiently cooled.

1: outdoor unit, 10: housing, 11: base, 12: front panel, 14: top plate, 15: air outlet, 17: air inlet, 19: air inlet 3: partition plate, 30: heat exchanger side plate, 31 : Exhaust hole 4: Machine room 5: Blower room, 50: Heat exchanger, 502: Refrigerant pipe, 51: Blower fan, 52: Wind shield member, 55: Air passage 6: Electrical component unit, 60: Electrical component, 67 : Water shielding lid 7: Exhaust duct, 70: Opening part, 71: Front surface, 72: Air hole, 73: Mounting plate, 74: Mounting piece, 75: Back surface

Claims (2)

The interior of the outdoor unit is partitioned into a machine room and a blower room by a partition plate and a heat exchanger side plate, and a blower fan and a heat exchanger are arranged at the center in the blower room, and the machine room is at the top. In the outdoor unit of an air conditioner with an electrical component unit,
A square tube-shaped exhaust duct is disposed on the upper surface of the heat exchanger, and the exhaust duct extends to an opening of the machine room to form one or more ventilation holes on the surface on the side of the blower fan, An air characterized in that a surface in which air holes are formed is a front surface, a surface opposite to the front surface is a back surface, and the heat exchanger is sandwiched between a pair of mounting plates extending downward from the front surface and the back surface, respectively. Harmonic outdoor unit.   The outdoor unit of an air conditioner according to claim 1, wherein the exhaust duct is pressed by a top plate that covers a ceiling of the outdoor unit main body.

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