JP2015055466A - Air conditioner outdoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner outdoor unit in which a blower chamber communicates with an electronic component unit via a vent hole for cooling electronic components, capable of surely preventing entry of water into the electronic component unit from the blower chamber even in poor situations such as stormy weather.SOLUTION: First water shield means 8 including a water shield plate is provided in the side of a blower chamber FC at a vent hole 50 communicating the blower chamber FC with an electronic component unit 7, and second water shield means constituted by a water shield box 54 having an open upper surface is provided in the side of the electronic component unit 7 at the vent hole 50, thereby providing double water shield structures.

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to a technique for preventing water from entering into an electrical component unit provided in the outdoor unit.

  The interior of the outdoor unit is usually partitioned into a blower room including a heat exchanger and a blower fan, and a machine room including a compressor and an electrical component unit via a partition plate that is erected almost vertically. (For example, see FIG. 3 of Patent Document 1 in particular).

  In many cases, the compressor and its piping are arranged on the lower side on the machine room side, and the electrical component unit is arranged on the upper side. In the electrical component unit, electrical components for driving the compressor, electrical components such as a circuit board and a power supply unit are accommodated.

  These electric parts include heat generating parts such as a reactor coil and an inverter circuit, and these heat generating parts need to be cooled.

  Therefore, in Patent Document 1, a plurality of air holes are provided in the upper part of the partition plate in the electrical component unit, and the air in the electrical component unit is blown by utilizing the fact that the blower chamber becomes negative pressure by driving the blower fan. By sucking in the room side, the heat in the electrical component unit is exhausted.

  As described above, in the conventional outdoor unit, in order to cool the heat generating components in the electrical component unit, the electrical component unit and the blower chamber are communicated with each other through the vent hole. The water may fall into the electrical component unit.

  In other words, water can easily enter the blower chamber from the heat exchanger, the air blow grill of the blower fan, etc., and drain water or infiltrated water can collect on the bottom plate and be swept up by the blower fan and enter the electrical component unit. is there.

  Therefore, in Patent Document 1, a water shielding means including a water shielding lid and a water shielding box that covers the vent hole is attached to the blower chamber side to prevent water from entering the electrical component unit.

  However, in the case of a storm such as a typhoon, for example, more water enters the blower chamber, so that the water shielding means on the blower chamber side is not sufficient, and a part of the water that has entered the blower chamber is blocked by the water shielding means. If the electric component part enters the electric component unit, the electric component is adversely affected. In the worst case, the electric component may break down.

JP2012-159225A

  Accordingly, an object of the present invention is to provide an air conditioner outdoor unit in which the blower chamber and the electrical component unit communicate with each other via a ventilation port for cooling the electrical component, for example, even under poor conditions such as a storm. The object is to reliably prevent water from entering the electrical component unit from the chamber.

  In order to solve the above-described problems, the present invention provides a blower chamber including a heat exchanger and a blower fan, a compressor disposed at the lower portion, and electrical components accommodated at the upper portion, by a partition plate standing inside the housing. The electrical component unit is attached to the partition plate, and the air in the electrical component unit is directed to the blower chamber side on the partition plate in contact with the electrical component unit. In the outdoor unit of the air conditioner provided with an inflow vent, in the vent, in order to prevent intrusion of water from the blower chamber toward the electrical component unit, A first water shielding means comprising a water shielding plate and a water shielding lid is provided, and is formed on the electrical component unit side so as to project to the electrical component unit side, and faces the upper surface and the vent hole. of There second water blocking means consisting of opened water-impervious box is characterized by being provided.

  Moreover, the aspect which equips the bottom face with the inclined surface used as the downward slope toward the said blower chamber side from the said electrical equipment unit side is also contained in the said water shielding box.

  Furthermore, the said water shielding box is provided respectively facing at least 2 or more vents arrange | positioned side by side, and the aspect formed integrally with the board | substrate holder which fixes the said electrical component to the said partition plate is also contained.

  Further, the first water shielding means includes a water shielding plate having a partition plate opposed to each of the two or more vent holes with a predetermined interval, and has a ventilation portion on a peripheral surface to cover the entire water shielding plate. The aspect provided with the watertight cover formed in the box shape is also included.

  ADVANTAGE OF THE INVENTION According to this invention, the penetration | invasion in the electrical equipment unit of the water which entered the air blower room at the time of a storm etc. can be blocked | prevented reliably.

The perspective view which shows the external appearance of the outdoor unit of the air conditioner which concerns on one Embodiment of this invention. The perspective view which shows the internal structure of the said outdoor unit. The perspective view which shows the state by which the electrical component is mounted | worn with the partition plate within an electrical component unit. The perspective view which shows the state which attached the ventilation duct to the partition plate within the electrical component unit. The perspective view which shows the state which looked at the back side of the ventilation duct from the downward direction. The cross-sectional view which shows the state which assembled | attached the ventilation duct to the partition plate. The perspective view which shows the modification of the attachment aspect of a ventilation duct. The perspective view which shows the 1st water-impervious means provided in the air blower chamber side of a partition plate. The disassembled perspective view of a 1st water shielding means. The longitudinal cross-sectional view which shows the state which attached the 1st water-impervious means to the partition plate. The perspective view which shows the modification of the vent provided in a partition plate.

  Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

  First, referring to FIG. 1 and FIG. 2, an outdoor unit 1 of an air conditioner according to this embodiment has a housing 4 provided with a blowing grill 41 of a blower fan 2 on the front surface (front side in FIG. 1). The interior of the housing 4 is partitioned into a blower chamber FC and a machine chamber MC by a partition plate 5 erected inside the housing 4.

  The blower chamber FC includes a blower fan 2 and a heat exchanger 3 inside thereof, and is disposed on the front left side of the housing 4 in FIG.

  The machine room MC has a compressor 61 and a receiver tank 62 and its piping (not shown) in the lower part, and a circuit board and an active circuit necessary for driving the outdoor unit 1 in the upper part of the compressor 61 and the receiver tank 62. An electrical component unit 7 that houses electrical components including heat generating electrical components such as a filter module (hereinafter abbreviated as “ACTPM”) 71 and a reactor 72 is provided, and is disposed on the right front side of the housing 4 in FIG. . On the back side of the housing 4 on the machine room MC side, an air intake hole 11 for taking air into the machine room MC and distributing it to the electrical component unit 7 is provided.

  In this invention, the specific structure of the ventilation fan 2, the housing | casing 4, the heat exchanger 3, the compressor 61, the receiver tank 62, and its piping may be arbitrary, The description is abbreviate | omitted.

  The partition plate 5 is a molded product of a highly rigid metal plate, and is erected almost vertically from the bottom surface of the housing 4 to the ceiling surface. Further, the partition plate 5 is formed at a height from the bottom surface of the housing 4 to below the electrical component unit 7, and an electrical component unit partition plate constituting a part of the electrical component unit 7 on the upper end surface thereof. May be placed.

  As shown in FIG. 3, in the electrical component unit 7, the upper side of the partition plate 5 enters the machine room MC from the intake hole 11 due to an atmospheric pressure difference (negative pressure) caused by the operation of the blower fan 2. A vent 50 is provided that forms a vent path through which the air cools the heat generating electrical components and flows into the blower chamber FC.

  In this embodiment, two vent holes 51 and 52 are provided as the vent hole 50. The vent holes 51 and 52 are arranged side by side on the left and right sides, and each has a rectangular hole. When it is not necessary to distinguish between the vents 51 and 52, the vents 50 are collectively referred to as the vent 50.

  The first water shielding means 8 for preventing water from entering the electrical component unit 7 from the blower chamber FC side is provided on the blower chamber FC side of the vent 50 (51, 52). The water shielding means 8 will be described later.

  A substrate holder 53 for ACTPM 71 is provided on the electrical component unit 7 side of the partition plate 5. The substrate holder 53 is made of a flame-retardant synthetic resin plate-like panel and is screwed along the partition plate 5.

  On the upper part of the substrate holder 53, water shielding boxes 54 a and 54 b are provided integrally with the substrate holder 53 so as to surround the vent holes 51 and 52, respectively. The impermeable boxes 54a and 54b have the same configuration and are collectively referred to as the impermeable box 54 when it is not necessary to distinguish them.

  The water shielding box 54 functions as second water shielding means for preventing water that could not be prevented by the first water shielding means 8 from entering the electrical component unit 7. That is, the outdoor unit 1 includes first and second double water shielding means 8 and 54.

  Referring also to FIG. 10, the water shielding box 54 is bent at a substantially right angle toward the upper side from the front end surface of the bottom plate 541 and the bottom plate 541 extending from the lower side of the vent 50 into the electrical component unit 7. A front plate 542 and a pair of left and right side plates 543 and 543 that are bent at a substantially right angle upward from each side of both end surfaces of the bottom plate 541, and one remaining side surface facing the vent 50, An upper surface 544 is opened.

  The bottom plate 541 forms an inclined surface that gradually descends at a predetermined angle θ from the electrical component unit 7 side toward the vent 50. As a result, even if water enters the impermeable box 54 beyond the first impermeable means 8, the inclined surface of the bottom plate 541 naturally returns to the first impermeable means 8 side. Note that the inclination angle θ of the bottom plate 541 may be arbitrarily changed according to the specifications.

  Referring to FIG. 3 again, in this embodiment, the substrate holder 53 is formed with an opening 55, and the opening 55 is installed so as to protrude toward the blower chamber FC with the partition plate 5 interposed therebetween. The ACTPM 71 is placed on the opposite surface of the heat sink and the heat sink (not shown). A reactor 72 is juxtaposed to the right of the ACTPM 71. The reactor 72 is attached to the partition plate 5 via a reactor attachment plate 56 attached to the partition plate 5.

  The ACTPM 71 and the reactor 72 are both high heat-generating parts (heat-generating electrical parts) used in the inverter device. In this embodiment, the ACTPM 71 is disposed below the one air vent 51 (hereinafter referred to as the first air vent 51). The reactor 72 is disposed on the lower side of the other vent 52 (hereinafter referred to as the second vent 52).

  The substrate holder 53 is further provided with one partition plate (hereinafter referred to as a first partition plate) 57 for forming two independent air passages 92 and 93 between a later-described ventilation duct 9 and the partition plate 5. ing.

  The first partition plate 57 is a plate body standing substantially vertically from the plate surface 53 a of the substrate holder 53, and is positioned between the ACTPM 71 and the reactor 72. The first partition plate 57 has an upper end side provided above the vent holes 51 and 52, and a lower end side extending below the ACTPM 71 and the reactor 72.

  As shown in FIG. 2, a first circuit board 73 and a second circuit board 74 are further provided in the electrical component unit 7. Referring also to FIG. 3, an inverter switching element or a large electrolytic capacitor 731 is mounted on the first circuit board 73 as a heating electrical component, and is attached to the lower side of the board holder 53.

Electronic components of a control system and a power supply system are mainly mounted on the second circuit board. A cantilever arm 58 protruding from the center of the upper end of the partition plate 5 into the electrical component unit 7 is attached to the electrical component unit 7 in the vicinity of the second circuit board 74.

  The ACTPM 71 and the reactor 72 are electrical components that generate a high temperature among electrical components, and it is desired to cool them efficiently. Therefore, in order to increase the flow velocity of air near the ACTPM 71 and the reactor 72 and increase the cooling efficiency, the vent holes 51 and 52 are provided above the ACTPM 71 and the reactor 72, respectively, to form a ventilation path. A ventilation duct 9 is provided in the ventilation path.

  As shown in FIGS. 4 to 6, the ventilation duct 9 has a second partition plate 91 that is substantially perpendicular to the inner surface of the ventilation duct 9 on the inner surface (the surface facing the partition plate 5) that matches the first partition plate 57. Is erected. The ventilation duct 9 is preferably formed from a synthetic resin plate which is an electrical insulating material.

  As shown in FIG. 6, when the tip of the second partition plate 91 and the tip of the first partition plate 57 are in contact with each other, two independent ventilation paths 92 and 93 are provided between the partition plate 5 and the ventilation duct 9. Is formed.

  One air passage 92 (hereinafter referred to as the first air passage 92) has a first cover portion 94 that covers the ACTPM 71 and a second cover portion 95 that covers the first air vent 51, and these are integrally formed. Is formed.

  In this embodiment, the first cover portion 94 is arranged so as to cover the ACTPM 71 in a state where the left side surface is opened from other design requirements in addition to the lower end. include.

  The second cover portion 95 is formed so as to cover the entire surface of the water shielding box 54a in a state where a predetermined air passage is secured around the water shielding box 54a provided in the first vent 51, and the lower surface side thereof is formed. The first cover portion 94 is integrally connected to the upper end side.

  Here, the height of the first cover portion 94 is made lower than the second cover portion 95 according to the height of the ACTPM 71 and the distance from the partition plate 5 is shortened. The flow can be made faster, and as a result, the ACTPM 71 can be cooled more efficiently.

  The other air passage 93 (hereinafter referred to as the second air passage 93) is formed so as to cover the whole of the water shielding box 54b provided in the reactor 72 and the second air vent 52, and only the lower end side is opened. Has been. In this embodiment, the height of the ventilation duct 9 constituting the second ventilation path 93 is the same from the upper end to the lower end.

  As shown in FIG. 4, in this embodiment, a part (notch portion 93 a) on the right side surface side of the ventilation duct 9 is notched, and the notch portion 93 a is erected from the partition plate 5. By covering, the right side is closed. The shielding plate 96 prevents radiation of noise generated from the reactor 72.

  According to this, with the operation of the blower fan 2 in the blower chamber FC, the air sucked from the intake holes 11 rises and enters the first ventilation path 92 and the second ventilation path 93 in the electrical component unit 7. Since the air is sucked and the flow velocity is increased in each of the air passages 92 and 93 and flows into the blower chamber FC side from the first air vent 51 and the second air vent 52, the ACTPM 71 and the reactor 72, which are heat generating electrical components, are efficiently used. Can be cooled.

  Further, since the first circuit board 73 disposed on the lower end side of the air duct 9 is also exposed to the air flow sucked into the air duct 9, the heat generating electrical components mounted on the circuit board 73 can also be efficiently used. Can be cooled.

  Depending on the specifications of the air conditioner, for example, there is a case where the amount of heat generated on the ACTPM 71 side is not so large, and only the reactor 72 side has a large amount of heat generated.

  In such a case, since the ACTPM 71 does not need to be actively cooled, the ventilation duct 9 is used as a reactor-specific ventilation duct 9A as in another embodiment shown in FIG. It is sufficient to cover only the reactor 72. The electrical component unit 7 may be an electrical component box that is disposed above the partition plate 5 and includes electrical components and their substrates.

  Next, with reference to FIG. 8 thru | or FIG. 10, the specific structure of the 1st water shielding means 8 provided in the fan room FC side is demonstrated.

  In this embodiment, the first water-blocking means 8 includes a water-blocking lid 81 and a water-blocking plate 82 disposed inside the water-blocking lid 81, and the first on the side surface of the partition plate 5 on the fan chamber FC side. And it is attached so that the 2nd vent holes 51 and 52 may be covered.

  The water shielding lid 81 is formed of a box body having an opening attached to the partition plate 5, and a plurality of slit-shaped ventilation openings 83 having eaves on the top are provided on the peripheral surface. A flange portion 84 to be attached to the partition plate 5 is provided at the periphery of the opening portion of the water shielding lid 81. The water shielding lid 81 is formed by bending a sheet metal.

  The water shielding plate 82 includes a base end portion 85 attached to the partition plate 5, a horizontal plate portion 86 bent substantially at right angles from the upper side of the base end portion 85 into the water shielding cover 81, and the horizontal plate portion 86. A pair of partitioning portions 87, 87 which are bent at a substantially right angle upward from the end portion and are arranged at a predetermined interval to be a ventilation path with respect to the vent holes 51, 52, and between the partitioning portions 87, 87 A tongue piece 88 is formed that is bent substantially at a right angle into the impermeable lid 81. The water shielding plate 82 is formed by bending a sheet metal, and is attached to the partition plate 5 so that the horizontal plate portion 86 is horizontal.

  The water shielding plate 82 is attached to the partition plate 5 with its base end portion 85 sandwiched between the partition plate 5 and the flange portion 84 of the water shielding lid 81, and covers the water shielding plate 82. A water lid 81 is attached to the partition plate 5 by welding.

  According to this water-blocking structure, the water that has entered the blower chamber FC is almost water-blocked by the water-blocking lid 81 and the water-blocking plate 82 of the first water-blocking means 8. Even if a large amount of water enters the blower chamber FC and enters the electrical component unit 7 side beyond the first water shielding means 8, the water shielding box 54 as the second water shielding means is provided on the electrical component unit 7 side. Therefore, there is no possibility that the intrusion water will drip into the electrical component unit 7.

  In addition, about mist water (mist-like water), the airflow which goes to the air blower room FC side from the electrical equipment unit 7 side has generate | occur | produced in the vent 50 (51, 52) by the driving | operation of a ventilation fan. The mist water hardly enters the electrical component unit 7.

  In the above-described embodiment, there are mainly two parts to be cooled, ACTPM 71 and reactor 72. Accordingly, there are two vent holes 50, 51 and 52 corresponding to this, but one vent is provided. A plurality of heat generating electrical components (in this example, the ACTPM 71 and the reactor 72) can be cooled by the port 50.

  That is, as shown in FIG. 11, a horizontally long vent 51A is formed above the ACTPM 71 and the reactor 72 as a vent 50 so as to straddle them, and a horizontally impermeable box 54A corresponding to the vent 51A. Is provided. The basic form of the water shielding box 54A is the same as the above-described water shielding box 54 (54a, 54b), and its upper surface is open.

  In the embodiment of FIG. 11, the ventilation duct 9 is attached so as to cover from the vent 51 </ b> A to the ACTPM 71 and the reactor 72, and the inside of the ventilation duct 9 is similar to the first embodiment with the first ventilation path 92 on the ACTPM 71 side. When dividing into the 2nd ventilation path 93 by the side of the reactor 72, the partition plates 57 and 91 (refer FIG. 6) are provided so that it may extend toward the downward direction from the lower surface of the water shielding box 54A.

  As described above, according to the present invention, the first water shielding means 8 is provided on the blower chamber HC side of the vent 50 communicating the blower chamber HC and the electrical component unit 7, and the electrical component unit of the vent 50 is provided. By providing a second water-impervious means consisting of a water-impervious box 54 on the 7 side and having a double water-impervious structure, water that has entered the blower chamber in the event of a storm or the like can be reliably infiltrated into the electrical component unit. Can be blocked.

1 Air conditioner (outdoor unit)
2 Ventilation fan 3 Heat exchanger 4 Housing 5 Partition plate 50 (50A, 51, 52) Vent 54 (54a, 54b) Water shielding box (second water shielding means)
55, 56 Opening 57 First partition plate 58 Arm 6 Heat source mechanism of refrigeration cycle 61 Compressor 7 Electrical component unit 71 ACTPM (active filter module)
72 reactor 73 first circuit board 74 second circuit board 8 first water shielding means 81 water shielding lid 82 water shielding plate 9 vent duct 91 second partition plate 92 first vent passage 93 second vent passage HC blower chamber MC machine chamber

Claims (4)

By a partition plate standing upright inside the housing, it is divided into a blower chamber including a heat exchanger and a blower fan, and a machine chamber having an electrical component unit in which a compressor is disposed in the lower portion and electrical components are accommodated in the upper portion. An air conditioner in which the electrical component unit is attached to the partition plate, and the partition plate in contact with the electrical component unit is provided with a vent through which air in the electrical component unit flows into the blower chamber side In the outdoor unit of
The vent is provided with a first water shielding means including a water shielding plate and a water shielding lid on the side of the blower chamber in order to prevent water from entering from the blower chamber toward the electrical component unit. And a second water shielding means comprising a water shielding box formed on the electrical component unit side so as to project to the electrical component unit side and having only an upper surface and a side surface facing the vent hole opened. An air conditioner outdoor unit characterized by   2. The outdoor unit for an air conditioner according to claim 1, wherein the impermeable box has an inclined surface that is inclined downward from the electrical component unit side toward the blower chamber side on the bottom surface thereof.   The water shielding box is provided so as to face at least two or more vents arranged side by side, and is formed integrally with a substrate holder for fixing the electrical component to the partition plate. The outdoor unit of the air conditioner as described in 1 or 2.   The first water shielding means has a water shielding plate having a partition plate opposed to each of the two or more vent holes with a predetermined interval, and has a ventilation portion on a peripheral surface so as to cover the whole of the water shielding plate. The outdoor unit for an air conditioner according to claim 1 or 3, further comprising a water shielding lid formed in a box shape.

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