JPH10267325A - Outdoor device of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable outdoor device of an air conditioner in which dusts and water droplets near electrical components are prevented from adhering to the components. SOLUTION: An outdoor device of the air conditioner is constructed such that its inner section is divided by a wall section 13, a control circuit board 12 with its parts surface being faced upward and another control circuit board 11 with its parts surface being faced downward are stored in an electrical component box 4 provided with an air suction port 6 and an air discharging port 7. The control circuit board 12 with its parts surface being faced upward is provided with a heat sink 15 projected out of the electrical component box 4 at its counter parts surface. This circuit board itself is of anti-close enclosure type, the control circuit board 11 with the parts surface being faced downward is cooled with air stream taken from an external area and then the control circuit board 12 with its parts being faced upward is cooled only with the heat sink 15 without using any air stream flowing in the electrical component box 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a current-carrying part used in an outdoor unit of an air conditioner.

[0002]

2. Description of the Related Art In recent years, in an outdoor unit of an air conditioner having a current-carrying part inside the body, water droplets and dust enter the outside of the body and from exposed portions inside the body, and these adhere to or accumulate on the live parts. Insulation failure and conduction abnormalities may occur, and the operation of energized components may become unreliable and cause a failure.Water droplets and dust are prevented from entering near the energized components, and the reliability of the outdoor unit of the air conditioner is reduced. It is required to establish a structure that enhances

[0003] Further, in a configuration in which the current-carrying parts in the airframe are mounted near the lower portion in the airframe, the airflow is discharged when the airframe is flooded or when the airframe melts frost adhering to the heat exchanger. If the amount of drain water generated is extremely large, the current-carrying parts may be flooded and cause a failure.In such a case, the current-carrying parts will not be flooded, and the outdoor unit of the air conditioner with high reliability will not be provided. It has been demanded.

A commonly used means for preventing the intrusion of water droplets and dust is to use a sealing material. However, if a large amount of sealing material is used, it is difficult to avoid an increase in the cost of the product itself. Depending on the method of sticking the material, the assemblability of the product may be degraded, and a structure that prevents the entry of dust and water droplets near the current-carrying parts without using a sealing material as much as possible,
There is a need to establish a method for attaching a sealing material that avoids deterioration in assemblability.

Conventionally, such an outdoor unit of an air conditioner has a configuration as shown in FIGS.

Hereinafter, the outdoor unit of the air conditioner will be described with reference to FIGS. Figure 5 shows the actual opening 61-
As shown in FIG. 7, an exhaust duct 103 is provided above an electrical box 102 for accommodating the control board 101, and the electrical box 102 and the heat exchanger room 104 are communicated with each other. The airflow induced by the outdoor fan in the
To cool the inside of the electrical box 102.

FIG. 6 is an excerpt from Japanese Patent Laid-Open Publication No. Hei 8-189672. As shown in FIG. 6, a partition plate 108 for dividing the reactor 105 into a heat exchanger room 106 and a compressor room 107 is shown. Fixed to the side of the compressor chamber 107,
A ventilation path 109 communicating with the heat exchanger chamber 106 is provided near the reactor 105, and the airflow induced by the outdoor fan is passed through the ventilation path 109 to cool the reactor 105.

FIG. 7 is an excerpt from Japanese Patent Application Laid-Open No. 5-99458. As shown in FIG. 7, the reactor 110 has a lower corner near the outdoor fan on the heat exchanger room 111 side, that is, a lower portion of the body. It was configured to be placed near.

Generally, as shown in FIG. 8, a sealing material 112 is attached to a sheet metal part 113, and a sheet metal part 114 is brought into direct contact with the sealing material 112 to maintain airtightness between the sheet metal part 113 and the sheet metal part 114. Had a configuration.

[0010]

In the conventional air conditioner outdoor unit as shown in FIG. 5, when the airflow passing through the exhaust duct 103 is to be supplied from the outside of the body, the airflow is generated from the outside of the body. Transport. Further, in general, since the exhaust port 103a for taking in the airflow from the outside of the airframe is made as small as possible in order to ensure the waterproof performance, it may be smaller than the cross-sectional area orthogonal to the streamline direction of the airflow passing through the exhaust duct 103. Therefore, when the airflow reaches the inside of the electrical equipment box 102, the flow velocity thereof is lower than that at the time when the airflow passes through the exhaust port 103a.

Further, in the vicinity of the component surface of the control board, the component itself fixed on the control board 101 becomes an obstacle to the airflow, and the flow velocity of the airflow becomes particularly slow. For this reason, the dust contained in the airflow starts to fall naturally when it reaches the inside of the electrical box 102. In particular, when the control board 101 in the electrical box 102 faces the component side, dust accumulates on the control board 101, Dust once deposited is hardly blown off by the airflow. If the operation is continued in this state, the control substrate 101 may have poor conduction or
It may cause insulation failure and cause a failure. Therefore, it is required to provide a structure in which dust does not accumulate on the control board 101 even if an airflow containing dust enters the electrical component box 102.

[0012] In the conventional outdoor unit of an air conditioner as shown in FIG.
6 is provided, and the airflow induced by the outdoor fan is passed through the ventilation path 109 to cool the reactor 105. Therefore, the outdoor fan is stopped, and the airframe receives the external wind pressure. When the static pressure on the heat exchanger room 106 side is higher than the static pressure on the compressor room 107 side, the airflow from the heat exchanger room 106 side to the vicinity of the reactor 105 passes through the ventilation passage 109. Become. At this time, if the outside air pressure contains water droplets, the reactor 105 is exposed to an air current containing water droplets, which may cause a failure. Therefore, it is required to provide a structure in which water droplets do not adhere to the reactor 105 even when the outdoor fan stops and external air pressure including water droplets is applied to the airframe.

Further, in the conventional air conditioner outdoor unit as shown in FIG. 7, since the reactor 110 is disposed at a relatively lower portion of the airframe, when the airframe is partially flooded or the airframe adheres to the heat exchanger. In the case where the amount of drain water discharged when frost is thawed is extremely large, the reactor 110 may be flooded. In such a case, it is necessary to provide a structure that does not flood the reactor 110. Has been requested.

Further, in the conventional outdoor unit of an air conditioner as shown in FIG. 8, the use of the sealing material 112 itself inevitably increases the cost of the product. Also, the sealing material 112 is unavoidable.
Is used, since the sealing material 112 is interposed between the sheet metal part 113 and the sheet metal part 114, especially when it is necessary to screw the sheet metal part 113 and the sheet metal part 114 together, The screw holes of the sheet metal part 114 are difficult to align, which may cause deterioration of workability.
Therefore, there is a demand for a structure that maintains confidentiality without using a sealant as much as possible and a method of attaching a sealant that does not affect the assembling performance of sheet metal parts.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and it is an object of the present invention to provide a highly reliable outdoor unit of an air conditioner which prevents the attachment and accumulation of water droplets and dust on a current-carrying part. One purpose.

The second object is that even when the main body is submerged to some extent or when the amount of drain water discharged from the main body is extremely large, the current-carrying part is not flooded and the outdoor unit of the air conditioner having high reliability is provided. Is to provide a machine.

The third object is to minimize the use of the sealing material and, in the case of unavoidable use, to attach the sealing material so as not to hinder the assembling work. Is to provide a means.

[0018]

Means for Solving the Problems One means of the outdoor unit of the air conditioner according to the present invention for solving the above-mentioned problems is that a control board fixed in the electrical box with the component surface facing upward is provided inside the electrical box. The cooling is performed by a heat sink that is fixed in a closed space provided in the air passage and protrudes into an air passage.

Another means is that a projecting portion projecting toward the heat exchanger chamber is provided on a part of a partition plate having a main body separated into a heat exchanger chamber and a compressor chamber along the compressor. And the reactor is fixed to the side of the protruding portion on the side of the compressor chamber.

According to the present invention, there is provided an outdoor unit of an air conditioner which can prevent dust and water droplets from adhering to the energized portion by the above means.

Another means is to select and fix at least a place above the upper end of the bottom plate constituting the bottom surface of the fuselage when assembling the reactor to the partition plate as described above.

According to the present invention, the outdoor unit of the air conditioner in which the current-carrying portion is not flooded even when the main body is submerged to some extent or when the drain water discharged from the main body is extremely large is provided by the above means. can get.

Another means is to provide an electrical box with a flange which is in close contact with the partition plate and is parallel to the partition plate.

Another means is that a sealing material is attached to a top plate constituting an upper surface of the body, and an exterior part forming a side surface of the body in contact with the top plate comes into contact with an outer peripheral end surface of the sealing material. It is.

According to the present invention, when the sealing member is not used as much as possible by the above means, and the sealing member is used unavoidably, the sealing member does not hinder the screwing operation and the like, and the air having the cheap and simple sealing means is provided. An outdoor unit of a harmony device is obtained.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention is directed to a control board having a component surface facing upward in an electrical component box having an interior partitioned by a wall and having an intake port and an exhaust port. A control board with the surface facing downward is accommodated, and the control board with the component surface facing upward has a heat sink protruding out of the electrical component box on the opposite component surface, and the substrate itself is anti-sealed, and the component surface is facing downward. The control board is cooled by an airflow taken from the outside, and the control board with the component surface facing upward is cooled only by the heat sink without using the airflow flowing inside the electrical box. This has the effect of preventing dust from being deposited on the control board with the component surface inside the box facing upward.

According to a second aspect of the present invention, the interior of the machine is divided into a heat exchanger room accommodating a heat exchanger and a compressor room accommodating a compressor by a partition plate. The upper part is configured to straddle the heat exchanger chamber and the compressor chamber, and a part of the partition plate is provided with a protruding part protruding toward the heat exchanger chamber, and a reactor is disposed on the compressor chamber side of the protruding part. The cooling of the reactor is performed by an airflow flowing from the compressor chamber to the heat exchanger chamber via the electrical equipment box, and near the reactor of the partition plate, the ventilation for the reactor cooling is provided. It is characterized by not having a port, and has an effect of preventing water droplets from adhering to the reactor without substantially reducing the heat exchange efficiency of the heat exchanger.

According to a third aspect of the present invention, in addition to the features of the second aspect, the projecting portion accommodating the reactor is provided at least on the partition plate from the upper end surface of the bottom plate constituting the bottom of the fuselage. Yes, even when the aircraft is flooded to some extent, or when the aircraft removes frost adhering to the heat exchanger and the drain water discharged is extremely large,
It has the effect of preventing the reactor from being flooded.

According to a fourth aspect of the present invention, in addition to the features of the first and second aspects, a portion of the bottom of the electrical box which is in contact with the partition plate is provided with a heat exchanger chamber parallel to the partition plate and of the partition plate. With a flange that closely adheres to the side surface,
This has the effect of preventing the airflow containing water droplets from entering the compressor chamber side from the heat exchanger chamber side without using a specific sealing material.

According to a fifth aspect of the present invention, there is provided an outdoor unit in which an electric box for accommodating a control board for controlling the outdoor unit is disposed immediately below a top plate of an exterior, wherein the electric box is provided above the electric box. A sealing material for keeping the airtightness is adhered, and an exterior component that forms a side portion of the outdoor unit and is in line contact with the top plate and the sealing material is in contact with the exterior component. Has the effect of ensuring the airtightness of the upper part of the electrical component box without hindering the screwing work of the electrical component box.

[0031]

【Example】

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to FIG.

FIG. 1 shows the construction of the outdoor unit of the air conditioner and the interior of the electrical equipment box. In the figure, the interior of the body consisting of the compressor room 1 and the heat exchanger room 2 has a partition plate 3 separating the two rooms.
And electrical box 4 for accommodating a control board for controlling the outdoor unit
And an outdoor fan 5 for performing heat exchange by forced convection on the heat exchanger chamber 2 side.

The electrical box 4 is fixed to the upper part of the partition plate 3 over the compressor chamber 1 and the heat exchanger chamber 2. An exhaust port 7 is provided on the side surface, and the compressor room 1 and the heat exchanger room 2 communicate with each other via the space of the electrical box 4.

Further, the exterior component 8 has an exterior intake port 9 on the side surface on the compressor chamber 1 side and an exterior exhaust port 10 in front of the outdoor fan 5.

Also, the control board 11 with the component surface facing downward
The electrical box 4 accommodating the control board 12 with the component surface facing upward, the wall 13 contacting the outer periphery of the control board 12 with the component surface facing upward, the electrical cover 14 contacting the wall 13, A heat sink 15 is provided which is in contact with the opposite side (solder surface side) of the control board 12 with the component surface facing upward and is exposed to the heat exchanger chamber 2 side.

In the above configuration, when the outdoor fan 5 is driven by the electric motor, an airflow that passes through the heat exchanger and is exhausted from the exterior exhaust port 10 to the outside of the body is induced.
The static pressure on the heat exchanger room 2 side is lower than the static pressure on the compressor room 1 side, and the exterior intake port 9, the compressor chamber 1, the intake port 6, the inside of the electrical box 4, the exhaust port 7, An airflow that passes through the heat exchanger chamber 2 and the exterior exhaust port 10 in this order is induced. The control board accommodated in the electrical box 4 is cooled by the airflow. Also, the control board 12 with the component surface facing upwards
Is cooled by only the heat sink 15 which receives the airflow that has almost passed through the heat exchanger without being directly exposed to the airflow for cooling the inside of the electrical box 4. Therefore, the wall portion 13 can prevent dust contained in the air current for cooling the inside of the electrical component box 4 from accumulating on the control board 12 with the component surface facing upward.

(Embodiment 2) Hereinafter, Embodiment 2 of the present invention will be described with reference to FIGS.

FIG. 2 shows details of an outdoor unit of the air conditioner and a partition plate for dividing the inside of the outdoor unit into a heat exchanger room and a compressor room.

In FIGS. 1 and 2, an airframe composed of a compressor room 1 and a heat exchanger room 2 includes a partition plate 3, an electric box 4 for accommodating a control board for controlling an outdoor unit, and a heat exchanger room 2
An outdoor fan 5 for performing heat exchange by forced convection is provided on the side.

The electrical box 4 is fixed to the upper part of the partition plate 3 so as to straddle the compressor chamber 1 and the heat exchanger chamber 2. The compressor chamber 1 and the heat exchanger chamber 2 communicate with each other via the electrical box 4. Further, the exterior component 8 has an exterior intake port 9 on the side surface of the compressor chamber 1 side and an exterior exhaust port 10 on the front part of the outdoor fan 5.

The partition plate 3 is basically formed along the compressor so as to make the heat exchanger chamber 2 side as wide as possible, and partly projects toward the heat exchanger chamber 2 for accommodating the reactor 16. The projection 17 is provided.

In the above configuration, when the outdoor fan 5 is driven by the electric motor, an airflow that passes through the heat exchanger and is exhausted from the exterior exhaust port 10 to the outside of the body is induced.
The static pressure on the heat exchanger room 2 side is lower than the static pressure on the compressor room 1 side, and the exterior intake port 9, the compressor room 1,
An airflow passing through the air inlet 7, the inside of the electrical component box 4, the exhaust port 7, the heat exchanger chamber 2, and the exterior exhaust port 10 is induced, and the reactor 16 is cooled by the airflow.

When the outdoor fan 5 is stopped,
When receiving a wind pressure from the exterior exhaust port 10 toward the outdoor fan 5 including water droplets, the exterior exhaust port 10,
An airflow passes through the heat exchanger room 2, the exhaust port 7, the inside of the electrical component box 4, the intake port 6, the protrusion 17, the compressor room 1, and the exterior intake port 9 in this order. Since no air passage communicating with the two sides is provided, the reactor 16 is not directly exposed to an air current containing water droplets.

In addition, by forming the portion other than the projecting portion 17 of the partition plate 3 basically along the compressor, it is possible to suppress the adverse effect on the air flow induced by the outdoor fan 5 and passing through the heat exchanger. Can be. Therefore, the projecting portion 17 provided on the partition plate 3 functions to prevent water droplets from adhering to the reactor 16 without substantially reducing the efficiency of the heat exchanger.

If the projecting portion 17 is provided at least above the upper end portion of the bottom plate 18 forming the bottom surface of the body, when the body is submerged to some extent or when the body removes frost adhering to the heat exchanger. It is possible to prevent the reactor 16 from being submerged even if the amount of drain water discharged to the reactor is extremely large.

(Embodiment 3) Hereinafter, Embodiment 3 of the present invention will be described with reference to FIGS.

FIG. 3 shows details of an outdoor unit of the air conditioner and a partition plate for dividing the interior of the outdoor unit into a heat exchanger room and a compressor room.

In FIG. 1 and FIG. 3, the interior of the machine is composed of a compressor room 1 and a heat exchanger room 2 divided by a partition plate 3, and a control board for controlling the outdoor unit is accommodated above the partition plate 3. An electrical box 4 is provided, and an exterior exhaust port 10 for discharging an airflow that has passed through the heat exchanger to the outside of the aircraft is provided in front of the exterior of the aircraft.

The electrical component box 4 is fixed to the upper part of the partition plate 3 so as to extend over the compressor chamber 1 and the heat exchanger chamber 2. The partition plate 3 is provided on the bottom of the electrical component box 4.
A flange 19 is provided in parallel with the partition plate 3 and in close contact with the partition plate 3 along with the electric component box 4.

In the above configuration, when an airflow that includes water droplets and enters the heat exchanger chamber 2 from the exterior exhaust port 10 is received, a portion where the partition plate 3 and the electrical component box 4 come into contact is concealed by the flange 19. Therefore, an airflow including water droplets does not enter the compressor chamber 1 from a gap between a portion where the partition plate 3 and the electrical component box 4 come into contact with each other. Therefore, the flange 19 can prevent an airflow including water droplets from entering the compressor chamber 1 from the heat exchanger chamber 2 side without using a specific sealing material.

Further, if such a configuration is applied to the outdoor unit of the air conditioner described in the second embodiment, it is possible to prevent water droplets from adhering to the reactor 16 without using a specific sealing material.

Embodiment 4 Hereinafter, Embodiment 4 of the present invention will be described with reference to FIG.

FIG. 4 shows an outdoor unit of an air conditioner, which comprises a top plate 20 constituting a top surface of the airframe, an electrical box 4 accommodating a control device for controlling the outdoor unit, and a side surface of the airframe. An exterior component 21 is provided. A sealing material 22 for maintaining the airtightness of the upper part of the electrical component box 4 is attached to the top plate 20, and the size and the attaching position of the sealing material 22 are such that the outer peripheral end surface of the sealing material 22 contacts the exterior component 8. Stipulated.

In the above configuration, the sealing material 22 is
Since it is not sandwiched between the exterior component 21 and the exterior component 21, the exterior component 21 does not hinder the contact with the top plate 20. Therefore, the method of attaching the sealing material 22 is based on the exterior component 21 and the top plate 20.
Thus, the airtightness of the upper part of the electrical component box 4 is ensured without hindering the screwing work.

[0055]

As described above, according to the present invention, even if there is a control board having a structure for cooling the inside of an electrical box by an airflow taken in from outside the machine body and having a component surface facing upward in the electrical box. This has the effect of preventing dust from accumulating on the control board, increasing the reliability of the control board, and increasing the reliability of the outdoor unit of the air conditioner.

Further, even when the body is flooded, the amount of drain water discharged from the body is extremely large, or even when the outdoor fan is stopped, water drops are prevented from adhering to the reactor, thereby improving the reliability of the outdoor unit. can get.

Further, by preventing the intrusion of water droplets into the compressor room without using a specific sealing material, there is an effect that an inexpensive indoor unit of an air conditioner can be provided.

Further, by realizing a method of attaching a sealing material for facilitating the screwing of the top plate and the exterior parts, it is possible to improve the production efficiency and to provide a more inexpensive and highly reliable outdoor unit of an air conditioner. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional perspective view showing a configuration inside an outdoor unit and an electric component box of an air conditioner according to Embodiments 1 to 3 of the present invention, including a partial development.

FIG. 2 is a partial cross-sectional view showing the configuration of an outdoor unit and a partition plate of the air conditioner according to the second embodiment.

FIG. 3 is a partial cross-sectional view illustrating a detailed configuration of an outdoor unit and a partition plate of the air conditioner according to the third embodiment.

FIG. 4 is a cross-sectional view showing the configuration near the top plate of the outdoor unit of the air conditioner according to the fourth embodiment.

FIG. 5 is a structural sectional view showing a cooling means in an electric equipment box of a conventional air conditioner.

FIG. 6 is a partial perspective view showing a configuration of a cooling means of the reactor.

FIG. 7 is a structural diagram showing an arrangement of the reactor.

FIG. 8 is a cross-sectional view showing a configuration near a top plate of the outdoor unit.

DESCRIPTION OF SYMBOLS 1 Compressor room 2 Heat exchanger room 3 Partition plate 4 Electrical box 6 Intake port 7 Exhaust port 11 Control board with component surface facing down 12 Control board with component surface facing up 13 Wall 15 Heat sink 16 Reactor 17 Projecting portion 18 Bottom plate 19 Flange 20 Top plate 21 Exterior parts 22 Sealing material

Claims (5)

[Claims] A control board having a component surface facing upward and a control board having a component surface facing downward are accommodated in an electrical box having an interior partitioned by walls and having an intake port and an exhaust port.
The control board with the component side facing upward has a heat sink protruding out of the electrical box on the opposite component side and the board itself is anti-sealed, and the control board with the component side facing downward cools by an airflow taken from outside. An outdoor unit of an air conditioner, wherein the control board with the component surface facing upward is cooled only by the heat sink without using an airflow flowing inside the electrical box. 2. The interior of the outdoor unit is divided into a heat exchanger room for housing a heat exchanger and a compressor room for housing a compressor by a partition plate, and an electrical box is provided above the partition plate with the heat exchange. A part protruding toward the heat exchanger chamber is provided on a part of the partition plate, and a reactor is fixed to a side of the protruding part on the compressor chamber side. The cooling of the reactor is performed by an airflow flowing from the compressor chamber to the heat exchanger chamber via the electrical equipment box, and the partition plate is not provided with a vent hole for cooling the reactor in the vicinity of the reactor. An outdoor unit of an air conditioner characterized by the above. 3. The outdoor unit of an air conditioner according to claim 2, wherein the projecting portion accommodating the reactor is provided on at least a partition plate above an end face of a curved portion of a bottom plate constituting a bottom surface of the outdoor unit. . 4. The air conditioner according to claim 1, further comprising a flange parallel to said partition plate and being in close contact with a surface of said partition plate on the heat exchanger chamber side at a portion in contact with the partition plate on the bottom surface of the electrical box. Machine outdoor unit. 5. An outdoor unit in which a control board for controlling an outdoor unit is housed immediately below a top plate of an exterior, wherein the electric box is provided on the top plate to maintain airtightness of an upper part of the electric box. An outdoor unit of an air conditioner, wherein a sealing material is attached and an exterior component that forms a side surface of the outdoor unit and makes line contact with the top plate and the sealing material is in contact with the exterior member.