JP2011094926A - Outdoor unit for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an outdoor unit for an air conditioner, reducing the size of a control box and discharging outside rainwater having intruded to the control box. <P>SOLUTION: The outdoor unit for the air conditioner includes the control box 70 installed on a partition plate astride an air blower chamber and a machine chamber, storing a control device controlling a compressor, communicated with the air blower chamber and the machine chamber, and enabling ventilation inside. The outdoor unit for the air conditioner is also equipped with: a box-shaped duct 80 provided on the air blower chamber side of the control box 70; first water shielding ventilation holes 81a provided on one side of a water shielding plate 81 on the air blower chamber side of the duct 80; second water shielding ventilation holes provided on the other side of a waterproof plate on the control box 70 side of the duct 80; a bottom ventilation hole provided at the bottom of the control box 70 and opened within the duct 80; and a water discharge port 83a provided in the duct 80 and discharging water made to drop down to a bottom plate of the duct 80 to outside of the duct 80. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an outdoor unit of an air conditioner.

  Conventionally, a water shielding wall having a ventilation opening between a blower chamber in which a blower is installed and a storage room for electrical components, a baffle plate provided so that the ventilation opening cannot be directly viewed, and the baffle plate in cooperation with each other An air conditioner configured to include a duct cover provided so that the ventilation opening cannot be directly viewed, and a duct defined by the water shielding wall, the baffle plate, and the duct cover so that the cooling air of the electrical component flows. In this outdoor unit, an air conditioner provided with an electrical box provided with a waterproof wall on the side of the storage chamber from the impermeable wall and provided with a deceleration chamber having a flow passage cross-sectional area larger than the ventilation opening area with the impermeable wall. An outdoor unit of a machine is disclosed (for example, see Patent Document 1).

JP 2008-116123 A

  However, the conventional technique described in Patent Document 1 has a problem in that the electrical box becomes large because the duct and the speed reduction chamber are provided on the fan chamber side of the electrical box. In addition, when rainwater has entered the electrical component storage chamber, there is a problem that the rainwater that has entered cannot be discharged into the blower chamber.

  This invention is made in view of the above, Comprising: While being able to make an electrical equipment box (control box) small, the air conditioning which can discharge the rain water which entered the electrical equipment box to the exterior (blower room) The purpose is to obtain an outdoor unit.

  In order to solve the above-described problems and achieve the object, the present invention includes a blower chamber in which an outdoor blower is installed, a machine chamber in which a compressor is partitioned by the blower chamber and a partition plate, and the blower chamber and the machine. An air conditioner that is installed on the partition plate across the chamber, houses a control device that controls the compressor, communicates with the blower chamber and the machine chamber, and is capable of ventilating the inside. In the outdoor unit, a box-shaped duct provided on the blower chamber side of the control box, a first water shielding vent hole provided on one side of a water shielding plate on the fan chamber side of the duct, A second water-blocking ventilation hole provided on the other side of the waterproof plate on the control box side of the duct; a bottom ventilation hole provided in the bottom of the control box and opening into the duct; and provided in the duct. A drain outlet for draining water that has fallen to the bottom plate of the duct to the outside of the duct; Characterized in that it comprises.

  The outdoor unit of the air conditioner according to the present invention has a small control box and can discharge rainwater that has entered the control box to the outside.

FIG. 1 is a perspective view showing an internal structure of an embodiment of an outdoor unit of an air conditioner according to the present invention. FIG. 2 is an exploded perspective view of the control box of the embodiment. FIG. 3 is a perspective view of the control box of the embodiment. FIG. 4 is a perspective view seen from another direction of the control box of the embodiment. FIG. 5 is a partial front view of the control box of the embodiment.

  Hereinafter, embodiments of an outdoor unit of an air conditioner according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  FIG. 1 is a perspective view showing an internal structure of an embodiment of an outdoor unit of an air conditioner according to the present invention. As shown in FIG. 1, the outdoor unit 90 of the air conditioner of an Example is mounted on the base 10, the compressor 20, the outdoor heat exchanger 30, the outdoor air blower 40, the compressor 20 (and outdoor). And a control unit 50 that drives and controls the blower 40). The entire outdoor unit 90 is accommodated in the housing 60 and connected to the indoor unit (not shown) by piping and a cable (not shown).

  The control unit 50 of the outdoor unit 90 controls the compressor 20 and control valves in accordance with instructions from the indoor unit, circulates the refrigerant discharged from the compressor 20 to the refrigeration cycle, and exchanges outdoor heat with the outdoor fan 40. The outside air is circulated through the vessel 30 and the air conditioning operation is performed.

  The outdoor blower 40 rotates clockwise as viewed from the direction of FIG. 1, sucks outside air from the outdoor heat exchanger 30 side, and blows it out to the opposite side (the front side of the outdoor unit 90). A partition plate 61 is installed between the outdoor blower 40 and the compressor 20, and the partition plate 61 partitions the inside of the housing 60 into a blower chamber 62 and a machine chamber 63. In the machine room 63, a compressor 20, an accumulator (not shown), a refrigerant pipe 21 and the like are installed and accommodated.

  The electrical components (inverter control device and the like) of the control unit 50 are accommodated in the control box 70, and the control box 70 is installed above the partition plate 61 across the blower chamber 62 and the machine chamber 63. Heat generation of electrical components such as an inverter control device (hereinafter simply referred to as “control device”) uses the heat sink installed in the control box 70 and the negative pressure of the outdoor blower 40 that ventilates the outside air into the blower chamber 62. Then, the outside air is circulated in the control box 70 to cool it. Further, when raining, water droplets repelled from the outdoor blower 40 are prevented from entering the control box 70.

  Next, the structure of the control box 70 will be described with reference to FIGS. 2 is an exploded perspective view of the control box of the embodiment, FIG. 3 is a perspective view of the control box of the embodiment, and FIG. 4 is a perspective view seen from another direction of the control box of the embodiment. FIG. 5 is a partial front view of the control box of the embodiment.

  A control device (not shown) of the control unit 50 is attached to the substrate and housed in a control box 70 formed in a step shape. The control box 70 includes a bottom plate 72, a lid 78 (see FIG. 1), a waterproof plate 73, a front plate 74, a back plate 75, an upper bottom plate 76, and an upper water shielding plate 77. The machine room 63 side of the control box 70 is opened, and the control box 70 communicates with the machine room 63. The machine room 63 communicates with the outside air outside the housing 60.

  The upper bottom plate 76 is provided with a rectangular opening 76a, and a heat sink (not shown) for radiating the heat of the IPM of the control device and the diode bridge is attached to the opening 76a with the radiating fins facing downward. As a result, the heat sink can dissipate heat in the blower chamber 62. On the machine room 63 side of the control box 70, an electrolytic capacitor (not shown) of the control device mounted on the lower side of the substrate is housed.

  On the upper water shielding plate 77 side of the back plate 75, a notch 75a is provided through which a cable connecting the motor of the outdoor blower 40 and the control device is passed. The upper water shielding plate 77 is provided with an engaging convex portion 77 a that engages with an engaging concave portion (not shown) provided on the lid 78.

  A box-shaped duct 80 having the waterproof plate 73 side opened is attached to the outside of the waterproof plate 73 (on the side of the blower chamber 62). The open surface of the duct 80 is closed by the waterproof board 73. The bottom plate 82 of the duct 80 is positioned lower than the bottom plate 72 of the control box 70. The blower chamber 62 side of the duct 80 is closed by a water shielding plate 81, and the lower part of the control box 70 side is closed by a lower water shielding plate 84.

  On the front side (one side; the front side of the outdoor unit 90) of the water shielding plate 81 (plate on the side of the blower chamber 62), a plurality (11 pieces) of vertical louvers 81a as first water shielding vent holes are provided. Is provided. The vertical louver 81a is cut and raised outside the water shielding plate 81 (on the blower chamber 62 side) so that the ventilation slit 81b faces the back side (outdoor heat exchanger 30 side) of the outdoor unit 90.

  On the back side (other side) of the outdoor unit 90 of the waterproof plate 73, a plurality of (four) horizontal louvers 73a are provided as second water-impervious ventilation holes. The horizontal louver 73a is cut and raised to the outside (the duct 80 side) of the waterproof plate 73 so that the ventilation slit 73b faces upward.

  Near the waterproof plate 73 of the bottom plate 72 of the control box 70, a louver 72a as a bottom ventilation hole is provided. The louver 72a cuts and raises the bottom plate 72 downward so that the ventilation slit 72b opens into the duct 80. In addition, as a bottom part ventilation hole, you may provide the louver 72t (only an arrangement position is shown in FIG. 5) in the lower part (bottom part) of the waterproof board 73. FIG. That is, the bottom ventilation hole may be provided at the bottom of the control box 70 such as the bottom of the bottom plate 72 or the waterproof plate 73.

  A beading 72 c as a weir that prevents water that has entered the control box 70 and dropped onto the bottom plate 72 from dripping into the mechanical chamber 63 is provided on the bottom plate 72 on the machine chamber 63 side. Under the front plate 83 of the duct 80, a drain outlet 83a is provided for draining water that has dropped onto the bottom plate 82 of the duct 80 into the blower chamber 62 (outside the duct 80). The drain port 83a may be provided in the bottom plate 82 of the duct 80.

  Next, ventilation and waterproofing of the control box 70 when the outdoor unit 90 of the air conditioner having the above-described structure is operated will be described with reference to FIGS. During normal air conditioning operation, outdoor fan 40 rotates in the direction of the solid arrow in FIG. At this time, the air around the outdoor unit 90 flows from the back side of the outdoor unit 90 (outside the outdoor heat exchanger 30) through the blower chamber 62 to the front side of the outdoor unit 90. Negative pressure relative to the surrounding ambient pressure.

  Therefore, outside air around the machine room 63 side of the outdoor unit 90 is sucked into the machine room 63 through the gap of the housing 60 and is sucked into the control box 70 from the machine room 63 side of the control box 70. The air sucked into the control box 70 cools the control device, and is sucked into the duct 80 through the ventilation slit 73b of the horizontal louver 73a and the ventilation slit 72b of the louver 72a (or louver 72t) of the bottom plate 72. It is.

  The air sucked into the duct 80 is sucked into the blower chamber 62 from the ventilation slit 81b of the vertical louver 81a. As described above, during normal operation, an air flow is generated in the control box 70 due to the negative pressure in the blower chamber 62 due to the ventilation of the outdoor blower 40, and the control device is cooled.

  Further, the heat sink is cooled by the rotating airflow generated in the outer peripheral portion of the outdoor blower 40, and the IPM and the diode bridge of the control device are cooled. In this way, the outdoor unit 90 of the air conditioner can continue to operate normally.

  Next, driving in rainy weather will be described. In the case of rain, the flow of air around the outdoor unit 90 by the outdoor blower 40 passes through the blower chamber 62 from the back side of the outdoor unit 90 (outside the outdoor heat exchanger 30) without changing from the normal operation described above. The air flows to the front side of the outdoor unit 90, and the inside of the blower chamber 62 becomes negative with respect to the surrounding external air pressure.

  However, the outdoor blower 40 is rained, and the water blows out in the rotation direction due to the rotation of the outdoor blower 40. Most of the splashed water droplets are blocked by the water shielding plate 81 and the vertical louver 81a of the duct 80, and hardly enter the duct 80.

  In addition, water droplets entering from a fan grill (not shown) on the front side of the outdoor unit 90 and water droplets splashing from the outdoor blower 40 and splashed by the fan grill are provided by the ventilation slit 81b of the vertical louver 81a. Since it faces the back side of 90, it hardly enters the duct 80 from the ventilation slit 81b.

  Some water droplets enter the duct 80 from the ventilation slit 81b, but settle in the duct 80 and fall to the bottom plate 82, or hit the waterproof plate 73 in the duct 80, and travel through the waterproof plate 73 to the bottom plate. It falls to 82, flows on the bottom plate 82, and is drained from the drainage port 83a to the blower chamber 62.

  A small amount of water droplets hitting the waterproof plate 73 become fine water droplets (mist) and float in the duct 80, but are pushed by the airflow flowing through the duct 80 toward the air slit 81b and are on the side of the blower chamber 62 , And hardly enters the control box 70 through the ventilation slit 73b.

  As described above, even in rainy weather, water droplets or mist hardly enter the control box 70, and the control device is controlled by the air flow generated by the outdoor blower 40 and the air flow in the control box 70 due to negative pressure. The IPM, the diode bridge, the electrolytic capacitor, and the like are cooled, and the outdoor unit 90 of the air conditioner can continue to operate normally.

  Next, the case where the outdoor unit 90 is stopped during a storm will be described. In extreme cases, strong wind blows into the blower chamber 62 from the fan grill on the front surface of the blower chamber 62 during a storm, and the outdoor blower 40 rotates in the reverse direction. It flows to the back side of the machine 90 (outside the outdoor heat exchanger 30), and the blower chamber 62 has a positive pressure (high pressure) with respect to the surrounding outside air pressure.

  Further, the outdoor blower 40 rotates in the reverse direction and rainwater is repelled in the rotation direction, and is scattered near the water shielding plate 81 of the duct 80. Further, when the pressure in the blower chamber 62 becomes positive, air flows in the duct 80 and the control box 70 in the direction opposite to the normal operation described above.

  That is, the air in the blower chamber 62 enters the duct 80 through the ventilation slit 81b of the vertical louver 81a, and the louver 72a (or louver 72t) provided in the ventilation slit 73b of the horizontal louver 73a and the bottom plate 72. ) Enters the control box 70 through the ventilation slit 72b, and is pushed out of the outdoor unit 90 from the gap of the housing 60 through the machine room 63 from the machine room 63 side of the control box 70.

  On the other hand, the rainwater bounced by the outdoor blower 40 is mostly blocked by the vertical louver 81a because the ventilation slit 81b of the vertical louver 81a faces the back side of the outdoor unit 90, and from the ventilation slit 81b. The water droplets and mist that enter the duct 80 together with the air flowing in the duct 80 are only a part.

  Most of the water droplets and mist that have entered the duct 80 settle in the duct 80 and fall to the bottom plate 82, or hit the waterproof plate 73 in the duct 80, travel through the waterproof plate 73, and drop to the bottom plate 82. Then, it flows on the bottom plate 82 and is drained from the drainage port 83a to the blower chamber 62.

  A small portion of the water droplets and mist that have entered the duct 80 flows along the airflow toward the horizontal louver 73a through the airflow, and is pushed back toward the water shielding plate 81 by the upward inclined surface of the horizontal louver 73a. It travels through the water shielding plate 81 and falls to the bottom plate 82, flows on the bottom plate 82, and is drained from the drain port 83 a to the blower chamber 62. Further, a part is captured by the horizontal louver 73 a, passes through the waterproof plate 73, and falls to the bottom plate 82 of the duct 80 or the bottom plate 72 of the control box 70.

  The water dropped on the bottom plate 72 of the control box 70 is returned into the duct 80 from the ventilation slit 72b of the louver 72a (or louver 72t), flows on the bottom plate 82, and is drained from the drain port 83a to the blower chamber 62. Thus, there is almost no rainwater enters the control box 70 through the ventilation slit 73b.

  Even if rainwater enters the control box 70, the bead 72c as a weir is provided on the machine chamber 63 side of the bottom plate 72 of the control box 70. Can be prevented from dripping into the machine chamber 63 and wetting the cable connection terminals of the compressor 20.

  Further, conventionally, a sealing material has been attached to the butt corners (for example, reference numeral 79 shown in FIG. 2) of each plate of the control box 70 and the notch 75a so as to prevent rainwater from entering, Although there were problems of man-hour increase and cost increase, the ventilation slit 72b was provided in the bottom plate 72 of the control box 70 (or the lower part of the waterproof plate 73), so that even if some rainwater entered the control box 70, there was a problem. The sticking of the sealing material can be omitted. Moreover, since the ventilation slit 72b was provided in the bottom plate 72 (or the lower part of the waterproof board 73) of the control box 70, the heat dissipation effect of the control box 70 can be improved.

  As described above, the outdoor unit for an air conditioner according to the present invention is suitable for operation in rainy weather or storm.

DESCRIPTION OF SYMBOLS 10 Base 20 Compressor 21 Refrigerant piping 30 Outdoor heat exchanger 40 Outdoor blower 50 Control part 60 Housing 61 Partition plate 62 Blower room 63 Machine room 70 Control box 72 Bottom plate 72a Louver (bottom ventilation hole)
72b Ventilation slit 72c Beading (weir)
72t louver (bottom ventilation hole)
73 Waterproof board 73a Horizontal louver (second impermeable vent)
73b Ventilation slit 74 Front plate 75 Back plate 75a Notch 76 Upper bottom plate 76a Opening 77 Upper water shielding plate 77a Engaging projection 78 Lid 79 Butting corner 80 Duct 81 Water shielding plate 81a Vertical louver (first shielding) Water vent)
81b Ventilation slit 82 Bottom plate 83 Front plate 83a Drain port 84 Lower water shielding plate 90 Air conditioner outdoor unit

Claims (5)

A fan room with an outdoor fan installed,
A machine room partitioned by the blower room and a partition plate and provided with a compressor;
A control box that is installed on the partition plate across the blower chamber and the machine room, stores a control device that controls the compressor, communicates with the blower chamber and the machine chamber, and is capable of ventilating the inside.
In an outdoor unit of an air conditioner comprising:
A box-shaped duct provided on the blower chamber side of the control box;
A first water shielding vent hole provided on one side of the water shielding plate on the fan chamber side of the duct;
A second impermeable air hole provided on the other side of the waterproof plate on the control box side of the duct;
A bottom ventilation hole provided at the bottom of the control box and opening into the duct;
A drain outlet for draining water dropped on the duct bottom plate to the outside of the duct;
An air conditioner outdoor unit comprising:   The first water-blocking vent hole, the second water-blocking vent hole, and the bottom vent hole are formed by louvers that are formed by cutting and raising the water-blocking plate, the waterproof plate, and the bottom of the control box, respectively. The outdoor unit of the air conditioner according to claim 1.   The first water shielding vent is a vertical louver in which the front side of the water shielding plate is vertically cut and raised to the blower chamber side so that the ventilation slit faces the back side of the outdoor unit. The outdoor unit of the air conditioner according to claim 2.   3. The air conditioner according to claim 2, wherein the second water-impervious ventilation hole is a horizontal louver that is cut and raised sideways on the duct side so that the ventilation slit faces upward. Outdoor unit.   The outdoor unit of the air conditioner according to claim 2, wherein the bottom ventilation hole is a louver that is formed by cutting and raising the bottom of the control box in the duct so that a ventilation slit is opened in the duct. .

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