JP4391368B2 - Outdoor unit and air conditioner - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner and an air conditioner using the outdoor unit, and more particularly to cooling of an electrical box of the outdoor unit.

Cooling of the electrical equipment box of the conventional outdoor unit is performed by the outdoor fan, and the outdoor air sucked from the airflow inlet passes through the airflow section, passes through the electrical equipment box, cools the electrical equipment, and heat exchanger from the airflow outlet. This is done by blowing from the outlet through the chamber and orifice. At this time, it is assumed that water droplets entering with the outdoor air hit the upper and lower waterproof walls in the airflow portion and do not enter the electrical box (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 6-257796 (5th page, FIG. 4)

  However, in the cooling of the electrical equipment box, when wind and rain with wind pressure due to a typhoon or the like enters from the outside air flow inlet, water droplets get over the waterproof wall and enter the electrical equipment box. Further, even in the case of air containing dust with wind pressure applied, dust easily enters the electrical equipment box due to the wind pressure. Therefore, there is a problem that the electrical components may be damaged by these water droplets and dust.

  The present invention has been made to solve the above-described problems, and prevents water droplets and dust from entering the electrical box even when wind and rain or dust with wind pressure enters from the outside air flow inlet. An object is to obtain an outdoor unit and an air conditioner using the outdoor unit.

The outdoor unit of the present invention includes a cooling inlet through which external air flows, a first air passage that guides external air sucked from the cooling intake, a flow direction of the first air passage and the external air is different, and an end portion In the same direction as the flow direction of the external air in the first air passage, the second air passage communicating with the electrical box, the space where the end portion of the first air passage and the start end portion of the second air passage are combined, A ventilation structure having an exhaust port provided ahead of the space, an electrical box is provided on the upper side of the housing, and the ventilation structure is attached to the side of the housing on the electrical box side. Is an external panel in which a generally long container-shaped body is mounted in the vertical direction on the side surface on the electrical equipment box installation side of the housing, with the concave portion on the side surface, and between the side surface of the housing and the external panel. It is arranged so as to be covered by the panel, and is also a generally long container without a side plate on the lower side, with the concave side on the side surface of the housing. It consists of an internal panel with the shape body mounted in the vertical direction, a cooling inlet that sucks in external air is provided at the top of the external panel, and an exhaust outlet is provided below the space at the bottom. The panel and the internal panel form a first air path in which the external air sucked from the cooling suction port flows downward, and the second air flows in the upward direction by the side surface of the housing and the internal panel. The lower side of the inner panel that forms a path and further forms the side surface of the housing and the start end of the second air path is below the cooling inlet of the outer panel, and the exhaust port is connected to the indoor unit The refrigerant piping with the heat insulating material and the internal / external connection wiring pass therethrough .

The outdoor unit of the present invention includes a first air passage that guides external air from the cooling inlet, a second air passage that has a different direction of flow of external air from the first air passage, and a terminal portion that communicates with the electrical box, A space portion where the end portion of the first air passage and the start end portion of the second air passage are combined, and an exhaust port provided in front of the space portion in the same direction as the flow direction of the external air of the first air passage ; An electrical box is provided on the upper side surface in the housing, and a ventilation structure is attached to the side surface of the housing on the electrical equipment box side. It is arranged so that it is covered by the external panel between the side surface of the casing and the outer panel, and the recess side is also the side face of the casing. As the side, it consists of an inner panel with a vertically long container shape body without a side plate on the lower side. A cooling inlet that sucks in external air is provided at the top of the panel, an exhaust port is provided below the space in the lower part, and external air sucked from the cooling inlet by the external panel and the internal panel is A first air passage that flows downward is formed, and a second air passage through which external air flows upward is formed by the side surface of the housing and the inner panel. Further, the side surface of the housing and the second air passage Because the lower end of the inner panel that forms the start end is below the cooling inlet of the outer panel, and the exhaust outlet is connected to the refrigerant piping with heat insulating material connected to the indoor unit and the internal and external connection wiring , Normally, outside air is sucked from the cooling inlet by the outdoor fan, led to the first air path, led to the electrical box through the second air path through the space, and when the wind pressure of the external air is strong, The external air guided to the first air passage passes through the space and becomes the wind pressure. As the air is exhausted to the outside through the exhaust outlet in the same direction, water droplets and dust can be prevented from entering the electrical box even when wind pressure or rain or dust comes into the external airflow inlet. It is possible to prevent the failure of electrical parts.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing the overall configuration of the outdoor unit main body of the outdoor unit according to Embodiment 1 of the present invention, and FIG. 2 is a diagram for explaining the ventilation structure for cooling the electrical box of the outdoor unit main body of FIG. FIG. 3 is a partial cross-sectional view, and FIG. 3 is an exploded perspective view showing an outer panel and an inner panel constituting the ventilation structure of FIG.
In these drawings, the outdoor unit main body 10 of the outdoor unit has a box-like appearance, and the box-shaped housing includes a compressor in which a heat exchange chamber 30 and a side end portion in the housing are partitioned by a partition wall 15. It is partitioned into a chamber 16. The heat exchange chamber 30 accommodates an outdoor heat exchanger (not shown) on the back side, an outdoor fan 20 driven by a fan motor (not shown) on the front side, an orifice 31 and the like. The compressor chamber 16 accommodates a compressor 17 and the like. Furthermore, it has the electrical equipment box 8 arrange | positioned ranging over the upper part of the heat exchange chamber 30 from the upper part of the compression chamber 16. In addition, a suction port (not shown) is provided on the back surface of the housing, and an air outlet 32 is provided on the front surface.

The outdoor unit main body 10 of the outdoor unit is provided with a ventilation structure for performing ventilation for cooling the electrical components in the electrical box 8 on the side surface of the casing on the compressor chamber 16 side. The ventilation structure is disposed between the outer panel 1 and the outer panel 1 so as to be covered by the outer panel 1 and the inner panel mounted on the side of the casing. And 3.
The external panel 1 is generally a container shape body that is substantially the same as the height of the side surface of the housing and whose width direction is smaller than the top and bottom direction and is long in the up and down direction. The bottom plate and the surrounding side plates form a container-shaped body, with the upper side being shallow and the lower side being deep. The concave side of the container-shaped body that is the outer panel 1 is the side surface of the housing, and the edge of the side plate of the outer panel 1 is closely fixed to the side surface of the housing, and is surrounded by the side surface of the housing and the outer panel 1. Form a space.
A ventilation opening louver 2 which is a cooling inlet for sucking outside air is formed in the bottom plate portion of the shallow container-shaped body on the upper side of the outer panel 1. Further, an exhaust vent 6 that is an exhaust outlet is formed in a deep container-shaped side plate on the lower side.

The space enclosed by the side surface of the housing and the upper side of the outer panel 1 is divided into two parts, and the inner panel 3 is arranged vertically between the side surface of the housing and the bottom plate of the shallow container-shaped body on the upper side of the outer panel 1. Install.
The inner panel 3 is a long and shallow container-shaped body as a whole, and forms a container-shaped body with a bottom plate and surrounding side plates, but there is no lower side plate. Further, the lowermost end portion on the lower side is formed to be lower than the lowermost end portion of the ventilation opening louver 2 of the outer panel 1. And the edge part of a side plate is closely fixed to the side surface of a housing | casing except for the lower part side.

Thus, the ventilation structure formed by the outer panel 1 and the inner panel 3 is formed by the outer panel 1 and the inner panel 3, and the first air passage 4a through which the sucked-out external air flows downward, and the housing And a second air passage 4b that flows upward and is formed by the side surface and the inner panel 3.
And the upper part of the 1st air path 4a is obstruct | occluded suitably, and prevents the external air which flowed in from the opening louver 2 for ventilation flows upwards.
Further, the end of the first air passage 4 a formed by the lowermost end portion of the inner panel 3 and the outer panel 1, and the start end of the second air passage 4 b formed by the side surface of the housing and the lowermost end portion of the inner panel 3. The space portion 5 in which the portion (the cooling vent 7 in FIG. 2) is united, that is, the space portion 5 that connects the two air passages 4a and 4b, and the space portion that stores the inflowing air flowing downward through the first air passage. 5 is formed in the outer panel 1 below the two air passages 4a and 4b. Then, below this space portion 5, an exhaust vent which is an exhaust port is provided on the side plate of the container-shaped body in the space (air channel) formed by the side surface of the housing and the deep container-shaped body on the lower side of the outer panel 1. 6 is formed.
Further, the upper part of the second air passage 4 b formed by the side surface of the housing and the internal panel 3 communicates with the opening of the electrical equipment box 8.

In such a ventilation structure, the external air sucked from the ventilation opening louver 2 by the outdoor fan 20 collides with the internal panel 3, is guided downward through the first air passage 4, and reaches the space portion 5. The second air passage 4b is raised from the cooling vent 7 formed by the side surface of the housing and the lowermost end of the partition plate 3, enters the electrical box 8, cools the internal electrical components, and the heat exchange chamber 30. Enters the heat exchange chamber 30 from the external airflow outlet 9 opening to the outside, is sucked from the suction port on the back of the housing, passes through the orifice 31 together with the external air that has passed through the heat exchanger, and blows out from the blowout port 32 on the front side Is done.
Further, when the outside is in a wind and rain state where wind pressure is applied due to a typhoon or the like, water droplets and dust are introduced from the ventilation opening louver 2 together with the external air subjected to wind pressure. The external air containing water droplets and dust is guided downward through the first air passage 4a after colliding with the inner panel 3, and is somewhat weakened by the collision with the inner panel 3, but still passes through the space portion 5 due to strong wind pressure. Then, the air is discharged from the exhaust vent 6 in the lower air passage following the first air passage. Then, external air free from water droplets and dust in the space 5 is sucked from the cooling vent 7.
In addition, as shown in FIG. 3, the refrigerant | coolant piping with a heat insulating material and internal / external connection wiring (illustration omitted) which connect with an indoor unit pass through the exhaust ventilation opening 6, and these are block | closed and opening becomes small.

The ventilation structure that cools the electrical box 8 is not limited to the structure in which the outer panel 1 and the inner panel 3 are used to overlap the outer first air path 4a and the inner second air path 4b. For example, in FIG. 3, the container depth of the inner panel 3 is made deeper in the same way as the upper container shape of the outer panel 1, and both panels 1, 3 are juxtaposed on the side of the casing, The part 5 is connected to the internal panel 3 by another panel or the like, and the first air passage 4a is formed by the back surface of the housing and the external panel 1, and the second surface is formed by the back surface of the housing and the internal panel 3. The air path 4b may be formed.
In short, the flow direction of the external air is different from the first air passage 4a that guides the external air sucked from the ventilation opening louver 2 that is the cooling inlet, and the terminal portion communicates with the electrical box 8. In the same direction as the flow direction of the external air in the first air passage 4a, the space portion 5 where the second air passage 4b, the end portion of the first air passage 4a and the start end portion of the second air passage 4b are combined, A ventilation structure provided with an exhaust ventilation opening 6 provided in the ventilation path ahead of the section 5, and sucks external air from the ventilation opening louver 2 by the outdoor fan 20, and the first ventilation path 4a To the electrical box 8 through the second air passage 4b through the space 5 and when the external air pressure is strong, the external air introduced to the first air passage 4a passes through the space 5 As long as it is exhausted to the outside from the exhaust vent 6 in the air passage in the same direction, the same effect can be obtained. It is.
In addition, regarding the flow direction of the external air (inflowing air) between the first air passage 4a and the second air passage 4b, the difference in the flow direction means that the upper air direction (the angle formed by both directions is 180 degrees with respect to the lower direction) Not only in the vertical direction) but also in the diagonally upward direction with respect to the downward direction.

  This outdoor unit forms an air conditioner by connecting the indoor unit and refrigerant piping. Such an air conditioner is highly reliable without failure of the electrical components of the electrical box 8 of the outdoor unit.

1 is a cross-sectional view showing an overall configuration of an outdoor unit main body according to Embodiment 1 of the present invention. It is principal part sectional drawing explaining the ventilation structure which cools the electrical equipment box of the outdoor unit main body of FIG. It is a disassembled perspective view which shows the external panel and internal panel which comprise the ventilation structure of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 External panel, 2 cooling inlet, 3 internal panel, 4a 1st air path, 4b 2nd air path, 5 space part, 6 exhaust port, 8 electrical equipment box, 17 compressor, 20 outdoor fan, 32 blower outlet.

Claims (2)

A heat exchanger, an outdoor fan, a compressor, an electrical box, and the like are included in the housing, and external air is sucked by the outdoor fan from a suction port provided on the outer surface of the housing, and the heat exchanger is passed through. In the outdoor unit that blows out from the air outlet provided on another outer surface of the housing,
A cooling inlet through which external air flows,
A first air path for guiding external air sucked from the cooling inlet;
A flow direction of the external air is different from that of the first air path, and a second air path whose end portion communicates with the electrical box;
A space where the end portion of the first air path and the start end of the second air path merge;
An exhaust port provided in the air path ahead of the space portion in the same direction as the flow direction of the external air in the first air path;
A ventilation structure with
The electrical equipment box is provided on the upper side surface side in the housing, and the ventilation structure is attached to the electrical equipment box side surface of the housing,
The ventilation structure has an external panel in which a generally long container-shaped body is attached in the vertical direction on the side surface of the housing on the electrical equipment box installation side, with the recessed portion side as the side surface side, and the housing A generally long container-shaped body that is disposed between a side surface and the outer panel so as to be covered by the outer panel, and has no side plate on the lower side, with the recess side as the side surface side. With an internal panel mounted vertically
Further, the cooling inlet for sucking outside air is provided in the upper part of the outer panel, and the exhaust port is provided in the lower part below the space part,
Further, the outer panel and the inner panel form the first air passage through which the external air sucked from the cooling inlet flows downward, and the side surface of the casing and the inner panel form an external portion. Forming the second air passage through which air flows upward;
Furthermore, the lower end portion of the inner panel that forms the side surface of the housing and the starting end portion of the second air passage is below the cooling inlet of the outer panel,
Wherein the exhaust port, chamber outboard motor you characterized by refrigerant pipes and the inner and outer connection wiring with heat insulating material to be connected to the indoor unit passes. An air conditioner, wherein the outdoor unit according to claim 1 and the indoor unit are connected by a refrigerant pipe.

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