JP2017015280A - Outdoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit of an air conditioner which has a constitution capable of improving a heat radiation effect of a heat sink for cooling electric components without deteriorating beautiful appearance of the outdoor unit.SOLUTION: A front panel 14 has a blowout port 20 and an auxiliary suction port 28. A fan guard 29 which has a frame body 31 in which one part is arranged opposing to the auxiliary suction port 28, and a guard part 30 which is rimmed by the frame body 31 and arranged opposing to the blowout port 20 is mounted on the front side of the front panel 14. The frame body 31 includes: a cover surface 31a for covering the auxiliary suction port 28 when viewed from the front side; an outside air introduction part 32 opened to the guard part 30 side and for introducing the outside air to a heat sink 26 via the auxiliary suction port 28; and an air guide plate 34 inserted in the auxiliary suction port 28 and for guiding the outside air introduced to the auxiliary suction port 28 toward the heat sink 26.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to a structure that improves the aesthetics of an outdoor unit and improves the heat dissipation effect of a heat sink that cools electrical components mounted on the outdoor unit.

  In a conventional outdoor unit of an air conditioner, the inside of the housing is partitioned by a partition plate into a machine room provided with a compressor and a heat exchange chamber provided with a heat exchanger and a blower fan. The electrical component box having a heat sink on the top is arranged so as to straddle the machine room and the heat exchange chamber. The front panel forming the front side of the housing is provided with an auxiliary suction port including an opening for introducing outside air into the heat sink to improve the cooling effect, and the heat sink is provided on the rear side of the auxiliary suction port. Is attached. In addition, a guard part formed in a lattice shape with vertical and horizontal bars is provided on the front surface, and a fan guard that integrally covers the air outlet and the auxiliary suction port of the front panel with the guard part is attached to the front panel. There is an outdoor unit (see, for example, Patent Document 1).

  Furthermore, in the outdoor unit described in Patent Document 1, a guide portion is provided at the lower back of the auxiliary suction port in order to efficiently guide the outside air taken in from the auxiliary suction port toward the heat sink. .

JP 2008-134008 A.

  In the conventional outdoor unit of an air conditioner described in Patent Document 1, the front panel is formed by resin molding, and the fan guard and the guide part are formed integrally with the front panel. However, in the current products, the exterior parts of the casing including the front panel are generally made of sheet metal from the viewpoint of preventing the spread of flames generated inside and outside the casing. It is difficult to make a complex structure like an outdoor unit, and there is a problem that the cost becomes high if the structure is complicated. In addition, the outside air introduction portion that introduces outside air into the heat sink has a structure that can be viewed from the front through the lattice-like gaps of the fan guard. Therefore, there is a problem that impairs the beauty as a product.

  Therefore, the present invention has been made in view of the above problems, and is an outdoor unit of an air conditioner having a structure capable of improving the heat dissipation effect of a heat sink that cools electrical components without deteriorating the aesthetics of the outdoor unit. The purpose is to provide.

  The present invention is an outdoor unit of an air conditioner that has been proposed to achieve the above object, and the present invention according to claim 1 has a front panel on the front surface, and the interior is partitioned by a machine room and a heat exchange chamber. An air conditioner outdoor unit, wherein the front panel has a blower outlet and an auxiliary suction port, and the heat exchange chamber includes at least a heat exchanger disposed on the back side, and the heat exchanger The machine room includes an electrical component box having an electrical component therein, and the electrical component box has a heat sink for cooling the electrical component. The heat sink is disposed facing the heat exchange chamber so as to face the auxiliary suction port, and a part of the heat sink is disposed facing the auxiliary suction port. A fan having a guard portion disposed opposite the outlet The frame is attached to the front side of the front panel, and the frame body covers the auxiliary suction port when viewed from the front side, and opens to the guard part side through the auxiliary suction port to the heat sink. An outside air introduction part that introduces outside air and a baffle plate that is inserted into the auxiliary suction port and guides the outside air introduced into the auxiliary suction port toward the heat sink are provided.

  According to this configuration, the outside air introduction portion that introduces outside air into the heat sink is provided on the frame of the fan guard that is disposed to partially face the auxiliary suction port of the front panel. Therefore, when the outdoor unit is viewed from the front side, the auxiliary suction port is covered with the cover surface of the frame. Similarly, the outside air introduction part and the air guide plate are also covered with the cover surface of the frame. Thereby, even when the outdoor unit is viewed from the front side, the auxiliary suction port and the external introduction portion are not seen through the lattice-like gaps of the fan guard. Moreover, the outside air introduced from the outside air introduction part is guided by the air guide plate and guided to the heat sink, and the heat sink can be efficiently cooled.

  The present invention according to claim 2 is configured such that the auxiliary suction port and the air guide plate are disposed adjacent to each other in the frame.

  According to this configuration, the path from the outside air introduction port to the auxiliary suction port is shortened and the flow path resistance is reduced, so that more outside air can be guided to the heat sink.

  ADVANTAGE OF THE INVENTION According to this invention, the beauty | look of an outdoor unit can be improved, without reducing the heat dissipation effect of the heat sink mounted in the outdoor unit.

  Moreover, the outside air introduced from the outside air introduction part is guided by the air guide plate and guided to the heat sink, and the heat dissipation effect of the heat sink can be improved.

It is a front view of the outdoor unit by this invention. It is a principal part disassembled perspective view of an outdoor unit same as the above. It is the sectional view on the AA line of FIG. It is the B section enlarged view of FIG. It is a schematic structure perspective view of the part corresponded to the B section of FIG. It is a figure explaining the structure of the external air introducing | transducing part and the baffle plate provided in the frame of the outdoor unit same as the above, (a) is the top view which looked at a part of frame from the front side, (b) is one of the frames It is the perspective view which looked at the part from the back side. It is CC sectional view taken on the line of Fig.6 (a). It is the DD sectional view taken on the line of Fig.6 (a). It is the perspective view which showed the electrical component box periphery structure in the outdoor unit by this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings. In addition, this embodiment is only an example and embodiment of this invention is not limited to this invention.

  FIG. 1 is a front view of an outdoor unit in an embodiment of an air conditioner according to the present invention, FIG. 2 is an exploded perspective view of a main part of the outdoor unit, FIG. 3 is a cross-sectional view taken along the line AA in FIG. 3 is an enlarged view of part B, FIG. 5 is a schematic perspective view of a portion corresponding to part B of FIG. 3, and FIG. 6 is a diagram for explaining the structure of the outside air introduction part and the air guide plate provided in the frame of the outdoor unit. (A) is a plan view of a part of the frame body as seen from the front side, (b) is a perspective view of a part of the frame body as seen from the back side, and FIG. 7 is a CC view of FIG. FIG. 8 is a sectional view taken along line D-D of FIG. 6A, and FIG. 9 is a perspective view showing the peripheral structure of the electrical component box.

  The outdoor unit 10 of the air conditioner by this invention is provided with the outdoor unit main body 11 as shown in FIGS. 1-3. As shown in FIG. 2, the outdoor unit main body 11 has a U-shaped cross section on a long rectangular base 12 having a pair of left and right legs 12a so as to surround both left and right sides from the back of the base 12. The outer cylinder 13 is erected, a front panel 14 is erected on the front surface of the base 12, and a top plate 15 is further attached to the top surface to form a box shape.

  The interior of the outdoor unit body 11 is partitioned into two chambers, that is, a machine chamber 17 and a heat exchange chamber 18 by a partition plate 16 erected on the base 12. As shown in FIG. 3, a suction port 19 that can take in outside air is provided in the back surface portion of the outer body 13 that forms the back surface of the outdoor unit main body 11, as shown in FIG. 3. . On the other hand, the front panel 14 that forms the front surface of the outdoor unit main body 11 has an air outlet 20 for discharging the air in the heat exchange chamber 18 to the outside of the outdoor unit main body 11 corresponding to the heat exchange chamber 18. Is provided.

  In the machine room 17 of the outdoor unit main body 11, an accumulator, an expansion valve and the like (not shown) are provided together with the compressor 21. On the other hand, in the heat exchange chamber 18, a heat exchanger 22, a blower fan (propeller fan) 23 disposed on the front side of the heat exchanger 22 so as to face the outlet 20, and a fan motor 24 that rotationally drives the fan 23. And.

  The heat exchanger 22 includes a plurality of fins arranged in parallel and heat transfer tubes arranged in a meandering manner so as to be orthogonal to the fins. The heat exchanger 22 is disposed at least on the back side of the heat exchange chamber 18, and in the present embodiment, is formed in an L shape so as to be disposed from the left side to the back. Furthermore, an electrical component box 25 that houses electrical components 251 such as switching elements and control boards is disposed in the upper part of the machine room 17, and a heat sink 26 for cooling the electrical components in the electrical component box 25 is heated. It arrange | positions so that the exchange chamber 18 side may be faced. The heat sink 26 is thermally connected to the electrical components in the electrical component box 25, and the heat of the electrical components is radiated from the heat sink 26 to the air flowing in the heat exchange chamber 18.

  When the blower fan 23 is driven by the fan motor 24, as shown in FIGS. 2 and 3, the air is sent out by the blower fan 23 from the suction port 19 on the back surface of the blower fan 23 to enter the heat exchange chamber 18. Air (outside air) is inhaled. The air is sent to the outside of the outdoor unit 10 from the blower outlet 20 through the blower passage 27 formed via the suction port 19, the heat exchanger 22, the blower fan 23, and the blower outlet 20. Yes.

  The heat sink 26 is made of aluminum having excellent heat conductivity. As shown in FIG. 3, the base 26a formed in a rectangular shape and a plurality of heat radiation fins 26b suspended from the lower surface of the base 26a. It is provided integrally. As shown in FIG. 2, the heat sink 26 is disposed on the heat exchange chamber 18 side opposite to the electrical component box 25 with the partition plate 16 in between, and on the heat exchange chamber 18 side as shown in FIG. It is provided at a position that is not on the air passage 27, that is, a position that is out of the air passage 27. Heat generated from the electrical components in the electrical component box 25 is transmitted to the heat sink 26 and radiated to the surroundings by the heat radiation fins 26b.

  The front panel 14 is made of sheet metal, and the front panel 14 is provided with an auxiliary suction port 28 for taking in outside air that cools the heat sink 26. The auxiliary suction port 28 is formed so as to penetrate the back side so as to face the heat radiation fins 26 b of the heat sink 26. Further, a fan guard 29 that covers the entire outlet 20 and auxiliary suction port 28 is attached to the front surface of the front panel 14.

  The fan guard 29 is a resin molded product (resin material). This fan guard 29 borders the outer periphery of the guard part 30 formed in the panel shape attached to the front panel 14 so that the blower outlet 20 and the auxiliary suction port 28 may be covered, and the guard part 30 is When attached to the front panel 14, the upper part 311 includes a frame 31 attached so that a part of the upper part 311 faces the auxiliary suction port 28. The fan guard 29 is fixed and attached with screws or the like in a state where a plurality of locking claws (not shown) provided on the frame 31 are inserted into a plurality of locking holes (not shown) provided on the front panel 14. In addition, the guard part 30 and the frame 31 may be integrally molded with a resin material, or may be molded individually and then joined together.

  As shown in FIGS. 1 and 2, the guard unit 30 includes a plurality of horizontal rails arranged in parallel in the horizontal direction on the front surface, and a plurality of vertical rails arranged in parallel in the vertical direction so as to be orthogonal to the horizontal rails. Thus, a plurality of openings 30a formed in a lattice shape are provided to form a substantially square plate network, and air sent from the blower fan 23 through the outlet 20 passes through the openings 30a. It can be blown out of the outdoor unit 10. On the other hand, the auxiliary suction port 28 is adapted to suck outside air into the heat exchange chamber 18 from the front side of the front panel 14 through the opening 30a.

  As shown in FIGS. 2 to 5, the frame body 31 borders the outer periphery of the guard portion 30, and the air outlet 20 of the front panel 14 has a part of the upper portion 311 facing the auxiliary suction port 28. It is attached to the outer periphery. When the outdoor unit 10 is viewed from the front, that is, when the fan guard 29 is viewed from the front side of the outdoor unit 10, the auxiliary suction port 28 is covered with the frame body 31.

  The part facing the auxiliary suction port 28 of the upper part 311 of the frame body 31 will be described in more detail. The upper part 311 of the frame body 31 includes a cover part 31a that covers the auxiliary suction port 28 in the front view of the outdoor unit 10 and its cover part. An outer peripheral portion 31b that is bent at a substantially right angle from the upper end of 31a and extends horizontally to the back side (front panel 14 side), and is also bent at a substantially right angle from the lower end of the cover portion 31a to the back side in parallel with the outer peripheral portion 31b. The upper portion 311 of the frame body is formed by the cover portion 31a, the outer peripheral portion 31b, and the inner peripheral portion 31c in FIG. 4 (an enlarged view of the B portion in FIG. 3 which is a cross-sectional view taken along the line AA in FIG. 1). As shown, the cross section is formed in a substantially U-shape opening toward the back side. The plurality of crosspieces constituting the guard portion 30 are provided on the plane of the inner peripheral portion 31b. Further, the inner peripheral portion 31c of the frame body 31 is provided with a cutout portion 32 in which a part of the inner peripheral portion 31c is cut out in a rectangular shape from the rear end portion (opening side). It is an outside air introduction section that introduces outside air. Therefore, hereinafter, the cutout portion 32 is referred to as an outside air introduction portion 32.

  In addition, an outside air introduction portion 32 and an air guide plate 34 are provided on the inner peripheral portion 31 c of the frame body 31. The air guide plate 34 corresponds to the auxiliary suction port 28 of the front panel 14, and a part of the inner peripheral portion 31 c thereof is directed from the rear end (opening side) to the back side (the heat radiation fin 26 b side of the heat sink 26). Thus, it is formed as an extending portion that extends in a convex shape. On the other hand, the outside air introduction part 32 is formed as a notch part in which a part of the inner peripheral part 31 c is notched into a rectangular concave shape from the rear end part (opening side) at a position adjacent to the air guide plate 34. .

  When the fan guard 29 is attached to a predetermined position of the front panel 14 in the frame body 31 formed in this way, at the same time as this attachment, a part of the front end portion of the inner peripheral portion 31c, that is, the air guide plate 34, As shown in FIGS. 3, 4, 5, 7, and 8, the fan guard 29 is inserted in the auxiliary suction port 28 to position the fan guard 29 in the left-right direction, and the air guide plate 34 faces the heat sink 26. It is arranged in a state of protruding horizontally. On the other hand, the outside air introduction part 32 is arranged in an open state facing downward, and the auxiliary suction port 28 of the front panel 14 is covered by the cover part 31a of the frame 31 in front view.

  In the frame body 31 and the front panel 14, the outside air in front of the front panel 14 enters the frame body 31 from the outside air introduction section 32 through the openings of the outside air introduction section 32 and the auxiliary suction port 28, and the inside of the frame body 31. Further, a heat sink cooling air passage 33 is formed through the auxiliary suction port 28 of the front panel 14 toward the heat sink 26. Note that the position where the outside air introduction part 32 is provided does not necessarily have to be a position adjacent to the air guide plate 34. In other words, the position may be a close position where the heat sink cooling air passage 33 through which the outside air smoothly flows is formed.

  Next, the flow of cooling air will be described. When the blower fan 23 is driven by the fan motor 24, air (outside air) is brought into the heat exchange chamber 18 from the suction port 19 provided on the back side of the blower fan 23 by sending out air by the blower fan 23. Sucked into. 2 and 3, the sucked air passes through the air inlet 27, the heat exchanger 22, the blower fan 23, the blower outlet 20, and the air passage 27 passing through the opening 30a of the fan guard 29. It flows through the heat exchange chamber 18 and is then delivered from the outlet 20. This air flow causes heat exchange between the air and the refrigerant in the heat exchanger 22.

  Further, when air flows through the air passage 27, the inside of the heat exchange chamber 18 becomes a negative pressure at a location outside the rotation trajectory of the outer peripheral edge of the air fan 23 of the air passage 27. And when the said location (henceforth, a negative pressure location) turns into a negative pressure, as shown in FIGS. 3-5, some external air which exists in the front side periphery of the outdoor unit 10 is provided facing a negative pressure location. Then, the air is sucked as heat sink cooling air into the heat exchange chamber 18 through the air flow path 33 for cooling the heat sink formed by the outside air introduction portion 32 and the auxiliary suction port 28. In the heat sink cooling air passage 33, as shown in FIGS. 5, 6 (b), 7 and 8, the heat sink cooling air sucked into the frame body 31 from the outside air introduction section 32 is transferred to the frame body 31. It flows from the inside toward the auxiliary suction port 28 side of the front panel 14, and is further guided from the auxiliary suction port 28 to the air guide plate 34 and flows toward the heat sink 26. Further, the heat sink cooling air that is guided by the air guide plate 34 and directed toward the heat sink 26 flows in the heat exchange chamber 18 toward the back side along the heat radiation fins 26 b of the heat sink 26, and touches the heat sink 26. Take away heat. Further, the heat sink cooling air that has flowed to the back side in the heat exchange chamber 18 along the heat dissipating fins 26 b of the heat sink 26 is mixed with the outside air from the suction port 19 passing through the air passage 27, and the outdoor unit 10 from the blowout port 20. Sent outside the. As a result, the heat of the heat sink 26 can be efficiently removed, the heat dissipation effect of the heat sink 26 can be improved, and the electrical components in the electrical component box 25 can be cooled.

  As described above, the outdoor unit 10 of the conditioner of this embodiment has the front panel 14 on the front surface, and the inside is partitioned into the machine room 17 and the heat exchange chamber 18 by the partition plate 16, and the front panel 14 is a blowout port. 20 and an auxiliary suction port 28, the heat exchange chamber 18 includes at least a heat exchanger 22 disposed on the back surface side, and a blower fan 23 disposed on the front surface side of the heat exchanger 22 so as to face the air outlet 20. The machine room 17 includes an electrical component box 25 having an electrical component 251 therein. The electrical component box 25 includes a heat sink 26 that cools the electrical component 251 so that the heat sink 26 faces the auxiliary suction port 28. The frame 31 is disposed facing the heat exchange chamber 18 and a part of the frame 31 is opposed to the auxiliary suction port 28, and the guard 30 is fringed by the frame 31 and disposed opposite the air outlet 20. The fan guard 29 having The frame 31 is attached to the front side of the face panel 14 and covers the auxiliary suction port 28 when viewed from the front side. The frame 31 opens to the guard portion 30 side and opens to the heat sink 26 via the auxiliary suction port 28. Is provided with an outside air introduction portion 32 for introducing air and an air guide plate 34 that is inserted into the auxiliary suction port 28 and guides the outside air introduced into the auxiliary suction port 28 toward the heat sink 26.

  In other words, the outside air introduction portion 32 for introducing outside air into the heat sink 26 is provided in the frame body 31 disposed to face the auxiliary suction port 28 of the front panel 14, and the frame body 31 is disposed on the guard portion 30 side. An introduction part 32 is provided. Therefore, when the outdoor unit 10 is viewed from the front side, the auxiliary suction port 28 is covered by the cover portion 31a of the frame body 31, and the outside air introduction portion 32 is also covered by the cover portion 31a of the frame body 31. Both 28 and the outside air introduction part 32 can be hidden from the front side. This makes it possible to prevent the auxiliary suction port 28 and the outside air introduction part 32 from being seen from the front side through the lattice-shaped opening 30a of the fan guard 29, so that the appearance of the outdoor unit 10 is not deteriorated. The heat dissipation effect of the heat sink 26 can be improved.

  Further, since the air guide plate 34 is provided on the inner peripheral portion 31 c of the frame body 31, the outside air introduced into the frame body 31 from the outside air introduction portion 32 is guided toward the heat sink 26 by the air guide plate 34. Since the heat sink 26 is touched and cooled, the heat sink 26 can be efficiently cooled.

  In the present embodiment, a case has been disclosed in which a part of the upper portion 311 of the frame body 31 that borders the entire guard portion 30 partially faces the auxiliary suction port 28 of the front panel 14. Alternatively, for example, the part 31 of the frame facing the auxiliary suction port 28 may be separated and the outside air introduction part 32 may be provided in the part. Furthermore, in this embodiment, the case where the auxiliary suction port 28 is covered with the upper part of the frame 31 (the upper part of the four sides bordering the rectangular guard part 30, the lower part, the right part, and the upper part of the left part) is disclosed. However, since the position of the auxiliary suction port 28 is set by the position of the heat sink 26 inside, for example, the auxiliary suction port 28 is covered with the right side portion 312 (see FIG. 1) of the frame body 31 and the right side portion 312 of the frame body 31 is covered. You may provide the external air introduction part 32 in the inner peripheral part 31c.

  Further, the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within a scope where the object of the present invention can be achieved are included in the present invention.

DESCRIPTION OF SYMBOLS 10 Outdoor unit 11 Outdoor unit main body 14 Front panel 19 Suction inlet 20 Outlet 25 Electrical component box 26 Heat sink 26a Base body 26b Heat radiation fin 27 Blower path 28 Auxiliary inlet 29 Fan guard 30 Guard part 30a Opening 31 Frame 31a Cover part 31b Outer peripheral part 31c Inner peripheral part 32 Notch part (outside air introduction part)
33 Heat sink cooling air passage 34 Air guide plate (extension part)

Claims (2)

Has a front panel on the front,
An air conditioner outdoor unit whose interior is partitioned into a machine room and a heat exchange chamber by a partition plate,
The front panel has an air outlet and an auxiliary air inlet,
The heat exchange chamber is
A heat exchanger disposed at least on the back side, and a blower fan disposed on the front side of the heat exchanger so as to face the outlet.
The machine room is
Equipped with an electrical component box with electrical components inside,
The electrical component box has a heat sink for cooling the electrical component,
The heat sink is arranged facing the heat exchange chamber so as to face the auxiliary suction port,
A fan guard having a frame part disposed partly facing the auxiliary suction port and a guard part bordered by the frame part and disposed facing the air outlet is attached to the front side of the front panel And
The frame includes a cover surface that covers the auxiliary suction port when viewed from the front side, an outside air introduction portion that opens to the guard portion side and introduces outside air to the heat sink via the auxiliary suction port, and the auxiliary suction An outdoor unit for an air conditioner, comprising an air guide plate that guides outside air that is inserted into a mouth and introduced into the auxiliary suction port toward the heat sink.   The outdoor unit of an air conditioner according to claim 1 or 2, wherein the frame body has the auxiliary suction port and the air guide plate disposed close to each other.

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