KR100570257B1 - Outdoor unit of air conditioner - Google Patents

Abstract

An object of the present invention is to provide an outdoor unit of an air conditioner, which effectively cools the inside of an electric box and at the same time increases the reliability of a control board installed in the electric box.

The partition plate 3 is partitioned into a machine room B and a heat exchanger chamber A at the upper part of the partition plate 3, and is spread over the upper part of the machine room B and the upper part of the heat exchanger chamber A. In the outdoor unit 1 of the air conditioner which arrange | positions the electrical equipment box 7 extended substantially horizontally, this electrical equipment box 7 has the exterior board which comprises the upper and lower sides, and the side, and arrange | positioned the control board in this exterior board. , An air inlet port 27 is provided on one exterior plate on the machine room B side of the electrical equipment box 7, an air outlet port 41 is provided on the heat exchanger room A side, and the control board is provided with an air inlet port ( 27) The outer periphery of the solder surface of the control board is brought into contact with one of the exterior plates 26 to 24 or the ribs 40 and 47 provided inside the exterior plate while being disposed outside the peripheral edge.

In addition, the partition plate 3 is erected and installed on the bottom plate constituting the housing, and the partition plate 3 is provided as a machine chamber B having a compressor and a heat exchanger chamber A having a heat exchanger and a blower. It is partitioned and installed in the upper part of the said partition board, and arrange | positions the electrical equipment box 7 extended substantially horizontally over the upper part of the machine room B, and the upper part of the heat exchanger chamber A, and in this electrical equipment box 7, In the outdoor unit of an air conditioner having a control board having a soldering surface on one side, the electric box 7 has an air inlet 27 on the machine room B side and an air outlet 41 on the heat exchanger chamber A side. ) And a ventilation path 28 for communicating these air inlets 27 and air outlets 41, wherein the control board contacts the inner circumference of the electric box 7 to the periphery of the solder surface to vent the solder surface. Block from furnace 28.

Heat exchanger room, partition plate, control board, electric box, heat sink

Description

Outdoor unit of air conditioner {OUTDOOR UNIT OF AIR CONDITIONER}

1 is an exploded perspective view of an outdoor unit in one embodiment of the present invention;

2 is a front view of the outdoor unit with the front panel removed.

3 is a perspective view of a battlefield box.

4 is a longitudinal sectional view of the electrical equipment box;

<Explanation of symbols for the main parts of the drawings>

A: heat exchanger room

B: machine room

1: outdoor unit

2: bottom plate

3: partition plate

4: compressor

7: battlefield box

8: outdoor heat exchanger

9: outdoor blower

12: left side plate

13, 25: right side plate

14: ceiling

15: front panel

20a: upper substrate
20b: lower substrate

22: front plate (exterior plate)

23: rear plate (exterior plate)

24: lower plate (exterior plate)

25a: upper frame plate

25b: lower frame plate

26: top plate (exterior plate)

27: air inlet

28: ventilation path

31, 32: projection member

36a, 36b: heat sink

40 rib (slope)

41: air outlet

43a, 43b, 44a, 44b: protrusion member

47: rib (inner frame)

The present invention relates to cooling in an electric box installed in an outdoor unit of an air conditioner.

Generally, the outdoor unit of the air conditioner which accommodated the compressor, the heat exchanger, the blower, etc. in the housing is known. In this kind of housing, the housing is composed of a bottom plate and a steel plate cover to arrange a front panel, a side plate and a back plate around the bottom plate, and to assemble a ceiling plate on the front panel, the side plate and the back plate. It is. The inside of the housing is partitioned into a heat exchanger chamber and a machine chamber by partition plates installed on the bottom plate, a heat exchanger and a blower are arranged in the heat exchanger chamber, and a compressor, an accumulator, and the like are arranged in the machine chamber.

Moreover, the electrical equipment box is arrange | positioned substantially horizontally over the upper part of a machine room, and a part of upper part of a heat exchanger room at the upper part of a partition plate. A control board for controlling the operation of the air conditioner is provided in the electric box, and an electric component that generates heat during operation is mounted on the control board so that the temperature in the electric box is increased. For this reason, a plurality of openings are provided in the electrical equipment box to create a ventilation path, and the inside of the electrical equipment box is cooled by flowing cooling air through the ventilation path (see Patent Document 1, for example).

[Patent Document 1]

Japanese Patent Laid-Open No. 2001-296041

However, in the electrical equipment box of the outdoor unit as described above, with the passage of cooling air therein, contaminated air containing dust, salt, contaminants, etc. may be introduced into the electrical equipment box from outside the machine body. If these dusts, salts, and contaminants adhere to the conductive parts of the electrical components, in particular, the solder surface of the control board, there is a possibility that the air conditioner may fail due to poor insulation or abnormal conduction. It is necessary to reduce the cause of such a failure as much as possible to increase the reliability of the air conditioner.

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional circumstances as described above, and an object thereof is to provide an outdoor unit of an air conditioner that effectively cools the inside of an electronic box and improves reliability of a control board installed in the electronic box.

In order to achieve the above object, the invention described in claim 1 is provided with a partition plate standing up on the bottom plate constituting the housing, the machine room having a compressor on the partition plate boundary, and a heat exchanger chamber having a heat exchanger and a blower It is partitioned and installed in the upper part of the said partition board, and arrange | positions the electrical equipment box which extends substantially horizontally over the upper part of a machine room, and the upper part of a heat exchanger chamber, This electrical equipment box has the exterior board which comprises the upper and lower sides, and the side board. In an outdoor unit of an air conditioner in which a control board is disposed in the air conditioner, an air inlet is provided on one exterior plate on the machine room side of the electrical equipment box, and an air outlet is provided on the heat exchanger room side so that the control board is positioned outside the periphery of the air inlet port. At the same time placing the entire periphery of the solder surface of the control board in contact with any one of the exterior plates or ribs provided inside the exterior plates It is characterized by.

Invention of Claim 2 provided the said control board in multiple numbers in the outdoor unit of the air conditioner of Claim 1. It is characterized by the above-mentioned.

Invention of Claim 3 is arrange | positioned horizontally in the outdoor unit of the air conditioner of Claim 1 or Claim 2 as the inner width dimension of an electrical equipment box.

In the invention according to claim 4, in the outdoor unit of the air conditioner according to any one of claims 1 to 3, a rib is provided on the inner periphery of the lid, using the upper face plate of the electrical equipment box as a cover, The solder surface of the control substrate is brought into contact with each other.

Invention of Claim 5 WHEREIN: The said control board was arrange | positioned vertically in the outdoor unit of the air conditioner of Claim 1 or Claim 2 as an inner height dimension of an electrical equipment box.

According to the invention of claim 6, a partition plate is installed on the bottom plate constituting the housing, and the partition plate is divided into a machine room having a compressor and a heat exchanger room having a heat exchanger and a blower at the upper part of the partition plate. And an electric equipment box disposed substantially horizontally across the upper part of the machine room and the upper part of the heat exchanger chamber, and in the electric outdoor unit of an air conditioner having a control board having a solder surface on one surface thereof. The box is provided with an air inlet on the machine room side, an air outlet on the side of the heat exchanger chamber, and a ventilation path communicating these air inlets and air outlets, and the control board contacts the inner surface of the electrical box to contact the solder surface. Characterized in that blocked from the ventilation path.

Invention of Claim 7 provided the protrusion member which further contacts a control board in the inner wall surface of the said electrical equipment box in the outdoor unit of the air conditioner of Claim 6. It is characterized by the above-mentioned.

Invention of Claim 8 WHEREIN: In the outdoor unit of the air conditioner of Claim 6 or 7, the plurality of control boards were provided in the said electrical equipment box. It is characterized by the above-mentioned.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described based on drawing.

1 is an exploded perspective view of an outdoor unit according to an embodiment of the present invention. In Fig. 1, reference numeral 1 denotes an outdoor unit having a rectangular parallelepiped. The outdoor unit 1 is similarly provided with a steel plate partition plate 3 on a steel plate bottom plate 2, and this partition plate 3 The heat exchanger chamber (A) and the machine chamber (B) are provided on both sides of the structure.

In the machine room (B), a compressor (4), an accumulator (5), a refrigerant pipe (6), an electrical equipment box (7), or the like, which constitute a part of a refrigeration cycle, is arranged. In the heat exchanger chamber (A), an outdoor heat exchanger (8) is arranged. ), An outdoor blower 9 and the like are provided.

The outdoor unit 1 has left and right both side plates 12 and 13, a ceiling plate 14, a front panel 15, and a back plate 16 made of steel, and a plurality of openings having shutters in the left plate 12. Is formed, the right side plate 13 is formed with an outlet for taking out the refrigerant pipe 6 and the cable between the units, and an opening with a lattice is formed in the front panel 15.

The front panel 15 and the ceiling plate 14 are integrally formed to form an approximately L shape, and the rear side of the heat exchanger chamber A is opened, and the outdoor heat exchanger 8 is disposed on the open rear side. . The right side plate 13 and the back plate 16 are formed integrally in a substantially L-shape and are arranged on the back side of the machine room B. As shown in FIG. Moreover, the reinforcement board 17 is arrange | positioned at the upper part of the outdoor heat exchanger 8, and this reinforcement board 17 is provided over substantially the full width of the heat exchanger room A and the machine room B. As shown in FIG. The ceiling plate 14 is mounted and fixed on the left and right side plates 12 and 13 and the reinforcing plate 17 disposed above the outdoor heat exchanger 8. These constitute a housing that surrounds the heat exchanger chamber (A) and the machine chamber (B).

2 is a front view of the outdoor unit with the front panel removed. In FIG. 2, the electrical equipment box 7 is installed substantially horizontally in the upper part of the said partition board 3, and this electrical equipment box 7 spreads the heat exchanger chamber A from the machine room B side over the partition board 3. In FIG. It extends to the side. The electrical component box 7 is provided with heat sinks 36a and 36b having control parts housed therein and having a plurality of heat dissipation fins on a side surface extending to the heat exchange chamber A side. The heat generated by the control components in the electric box 7 is transmitted to these heat sinks 36a and 36b. The air passing through the heat exchange chamber A is blown through these heat sinks 36a and 36b to cool the heat generated by the control components in the electric box 7.

In addition, the sealing box 18 of the sponge type is arrange | positioned in the electrical equipment box 7 from the ceiling surface to the front surface. This sealing material 18 is arrange | positioned at the upper part of the position where the partition plate 3 is arrange | positioned, and the sealing material 18 is the upper surface (ceiling surface) and front surface of the electrical equipment box 7, and the illustration is abbreviate | omitted, but The watertightness of the heat exchanger chamber A and the machine room B is ensured by pinching by 14 and the front panel 15. As shown in FIG. As a result, rainwater penetrates into the heat exchanger chamber A from the opening of the front panel 15 and the left side plate 12, etc., but the machine room B includes the ceiling plate 14, the front panel 15, and the right side plate 13; ) And back plate 16, so that rainwater does not invade.

Fig. 3 is a perspective view of the electrical equipment box cut away except a part of the front plate, and Fig. 4 is a longitudinal sectional view of the electrical equipment box. In Figs. 3 and 4, the electric box 7 is formed in a box member shape so that the upper plate 26, the front plate 22, the rear plate 23, the lower plate 24 and the right plate 25, which are exterior plates, are formed. The front plate 22, the rear plate 23, and the upper plate 26 cover the entirety of the front face, the rear face and the top face of the electrical equipment box 7, respectively. Openings are provided in the lower plate 24 and the right side plate 25, and a ventilation path 28 communicating with the openings of the lower plate 24 and the right side plate 25 is formed in the electrical equipment box 7. The front plate 22, the rear plate 23, the lower plate 24, and the right plate 25 are integrally formed, and the upper plate 26 is formed separately as a cover. In the inside of the electrical equipment box 7, two control boards, the upper board | substrate 20a and the lower board | substrate 20b, are arrange | positioned in the upper part and the lower part horizontally. These front and back widths of these control boards are made in the front and back widths of the electrical box 7, and one surface is a solder surface and the other surface is an electrical component surface on which an electrical component is loaded.

An air inlet port 27 as an air inlet port of the electrical equipment box 7 is formed in the substantially center of the right side plate 25, and the upper substrate (upper frame plate) 25a of the side plate 25 protrudes inward to form an upper substrate. The projection member 31 which supports 20a from the lower part is provided, and the projection member 32 which presses the lower board 20b from the upper part is provided in the lower part (lower frame plate) 25b of the side plate 25. . On the upper and lower portions of the inner wall surface of the right side plate 25, projection members 31 and 32 protruding inward over the front and rear widths are provided, respectively. In addition, an attachment plate 33 protruding outwardly (downward) is attached to the lower frame plate 25b (below the outside), and this attachment plate 33 is a right plate 13 of the outdoor unit 1 (Fig. 1), and a terminal block 34 for wiring to a power supply and an indoor unit is mounted and stacked.

In addition, the left side surface is opened to the heat exchanger chamber A, and the two heat sinks 36a and 36b are screwed to the upper and lower stages and the periphery of the opening so as to block the opening. These heat sinks 36a and 36b are screwed to upper and lower stages and to attachment portions (not shown) provided at the periphery of the opening. Power modules 37a and 37b for generating a large amount of heat are attached to these heat sinks 36a and 36b, respectively, and these heat sinks 36a and 36b are also connected to the control board by attachment holes, respectively.

On the inner wall surface of the front plate 22, two upper and lower projecting members 43a and 43b projecting rearward are provided over the substantially horizontal width so as to load the front edge of the control board, respectively.

Similarly, two upper and lower projection members 44a and 44b projecting forward are provided on the inner wall surface of the rear plate 23 so as to load the rear edge of the control board, respectively.

The lower plate 24 is provided with a plurality of bosses 38 having screw holes for supporting and fixing the lower substrate 20b. Further, the left end of the lower plate 24 has a groove 39 for supporting the heat sink 36b from the left side, an air outlet 41 serving as an air outlet opening to the heat exchanger chamber A on the right side of the groove 39, and A rib (inclined plate) 40 is formed at the right edge of the air outlet 41 over the front and rear widths inclined upwardly and over the front and rear widths. An angled cylindrical guide duct 42 facing (3) is formed.

At the left end of the front plate 22, two upper and lower protrusion members 43a and 43b protruding rearward are formed to support the upper substrate 20a from the lower side with the upper protrusion member 43a, and the lower protrusion member 43b. The lower substrate 20b is pressed from above.

Similarly, two upper and lower protrusion members 44a and 44b protruding forward are formed at the left end of the rear plate 23 to support the upper substrate 20a from the lower side with the upper protrusion member 44a, and the lower protrusion member ( The lower substrate 20b is pressed from the top with 44b.

The upper plate 26 functions as a cover of the electric box 7, and at its periphery is formed a rectangular outer frame 45 which projects downward, and the outer frame 45 is the front plate 22 and the right plate. It is to be externally fitted in the upper edge of the 25, the back board 23, and the heat sink 36a. A protruding plate 46 which protrudes downward from the inner end of the outer frame and presses the heat sink 36a, and a rectangular frame rib (inner frame) pressed in contact with the periphery of the upper substrate 20a around the inner side. 47 is formed. That is, a rectangular rib (inner frame) 47 is formed inside the outer frame 45 and protrudes downward in the same size as the upper substrate 20a, and the rib (inner frame) 47 is formed on the upper substrate. It is made to contact the periphery of the upper surface of 20a. Moreover, the protrusion member 46 which protrudes below and presses the heat sink 36a between the outer frame 45 and the rib (inner frame) of the left end part is formed.

In the electrical equipment box 7 comprised in this way, the upper board | substrate 20a has the solder surface as an upper side, and the lower side is the projection board 31 and the projection members 43a and 44a, and the upper side is the rib (inner frame) 47. It is fixed by pinching with. Since the peripheral surface of the solder surface of the upper substrate 20a is pressed against the rib (inner frame) 47 of the rectangular frame type, the solder surface is kept airtight from the outside air. That is, when attaching the upper board 20a to the electrical equipment box 7 comprised as mentioned above, the upper board 20a is arrange | positioned with the solder surface up. The lower surface of the upper substrate 20a contacts the protruding members 43a, 44a, and 31, and the peripheral edge of the upper surface of the upper substrate 20a contacts the rib (inner frame) 47 of the upper plate 26. It is fixed. Since the peripheral edge of the upper surface of the upper substrate 20a contacts the ribs (inner frame) 47 so that the solder surface is covered by the upper plate 26, the solder surface is kept almost airtight, and the solder surface is ventilated. Is blocked). As a result, even if a contaminant or the like penetrates into the ventilation path 28, it is possible to prevent intrusion into the solder surface and to suppress the deterioration of the solder as much as possible.

In addition, the lower substrate 20b is fixed by fixing the lower surface to the boss 38 and the upper side to the lower projection board 32 and the projection members 43b and 44b with the solder surface as the lower side. Since the right edge is pressed against the lower frame plate 25b, the front edge to the front plate 22, the rear edge to the rear plate 23, and the lower end of the left end to the rib (slope plate) 40, the solder surface This is kept confidential from the outside air. That is, the lower substrate 20b is disposed with the solder surface down, and contacts the protruding members 43b and 44b and the ribs (inclined plate) 40 to the front and rear and left edges of the lower surface, and to the right edge of the upper surface. It contacts with the projection member 32, and is fixed to the boss 38 by an attachment screw. Since the edges of the lower and upper surfaces of the lower substrate 20b contact the protruding members 43b and 44b, the ribs 40 and the protruding members 32, the solder surface is covered by the lower plate 24, so that the solder The face is kept almost airtight and shut off from the vent 28. As a result, even if a contaminant or the like penetrates into the ventilation path 28, it is possible to prevent intrusion into the solder surface and to suppress the deterioration of the solder as much as possible.

In the electric box 7 comprised in this way, when the outdoor blower 9 is operated at the time of air conditioning operation, the outside air blown in into the heat exchanger chamber A through the heat exchanger 8 is taken out from the front panel 15. As shown in FIG. As a result, as the wind flows through the heat exchanger chamber A, the air pressure in the heat exchanger chamber A is lowered, and the air in the electrical equipment box 7 is discharged from the air outlet 41 extending into the heat exchanger chamber A. By being discharged, air that has entered the machine room B from a small gap of the outdoor unit 1 (for example, a gap between the refrigerant pipe and the portion where the cable between the units is drawn out) is air as shown by the solid arrow in FIG. It enters into the electrical equipment box 7 through the inlet port 27, flows between the electric component surfaces of the control board, and flows out from the air outlet 41 to the heat exchanger chamber A. Thereby, the electrical component on the control board is cooled.

At this time, the air flowing into the electronic box 7 may contain dust, salt, and contaminants, but the control board turns the solder surface from the air inlet 27, and the solder surface of the control board is ventilated. Since it is kept almost airtight from the furnace 28 (from the outside air), it is difficult to attach dust, salt, or contaminants to the solder surface, and the occurrence of poor insulation and abnormality in conduction of the control board is reduced.

As mentioned above, although this invention was implemented based on one Embodiment, this invention is not limited to this, A various deformation | transformation is possible.

In the present embodiment, the control board is arranged horizontally, but the solder surface may be arranged airtight toward the front plate 22 or the rear plate 23 with the control board vertical. In addition, in this embodiment, although the control board is arrange | positioned horizontally, you may arrange | position vertically, In that case, the solder surface of a control board is arrange | positioned toward the front board 22 or the back board 23, The peripheral edge is brought into contact with the inner wall surface (or the projection member provided on the inner wall surface), and the solder surface is blocked from the ventilation path 28.

As described above, the electrical equipment box of the present invention has a structure in which the solder surface of the control board does not come into contact with the outside air. Therefore, when dust, salt, or contaminants are contained in the outside air, it is possible to prevent adhesion to these solder surfaces. By reducing the cause of the failure, the outdoor unit of the air conditioner can be improved in reliability.

Claims (8)

A partition plate is installed on the bottom plate constituting the housing, and is partitioned into a machine room having a compressor at the boundary and a heat exchanger room having a heat exchanger and a blower and installed at the upper part of the partition plate. In an outdoor unit of an air conditioner having an electrical equipment box extending substantially horizontally over an upper portion and an upper portion of a heat exchanger chamber, and in the electrical equipment box having a control board having a solder surface on one surface thereof, The electrical box is provided with an air inlet on the machine room side, an air outlet on the heat exchanger chamber side, and a ventilation path communicating these air inlets and air outlets, and the control board contacts the inner edge of the electric box with the solder for soldering. An outdoor unit of an air conditioner, wherein a surface is blocked from the ventilation path. The outdoor unit of the air conditioner according to claim 1, wherein a projection member is provided on an inner wall surface of the electric box to contact a control board. The outdoor unit of the air conditioner according to claim 1 or 2, wherein a plurality of control boards are provided in the electrical equipment box. delete delete delete delete delete

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