JP5985952B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to a separation type air conditioner in which an indoor unit and an outdoor unit are separated, and more particularly to an improvement in a heat exchanger holding structure in the outdoor unit.

  An example of a heat exchanger holding structure for an outdoor unit of this type of air conditioner is shown in Patent Document 1. The bottom plate of the outdoor unit of Patent Document 1 is a middle plate surface on which a heat exchanger mounting surface composed of a low step surface on which a heat exchanger is mounted by pressing a metal plate and a compressor is mounted on the bottom plate. And a compressor mounting surface composed of a high step surface.

  On the heat exchanger mounting surface, drain water that quickly drains not only drain water generated by the outdoor heat exchanger but also drain water led from the drainage channel of the compressor mounting surface to the heat exchanger mounting surface. Water drainage holes are formed. Further, a positioning protrusion having a small area is squeezed out at the corner of the heat exchanger mounting surface, and the bent portion of the outdoor heat exchanger formed in an L shape in a plan view is positioned and held.

JP 2001-317766

  By the way, in the outdoor unit of Patent Document 1, a bottom plate is formed on the bottom plate, and evaporating water (defrost water) or rainwater of a heat exchanger generated during heating is guided to the drain plate on the bottom plate. However, since these waters may freeze in cold regions, it is desirable to install the drain holes formed in the low stage surface only at the lower part of the heat exchanger as much as possible.

  On the other hand, as a holding mechanism for the outdoor heat exchanger, a positioning protrusion having a small area is squeezed and formed on the heat exchanger mounting surface, which is the lower step surface of the bottom plate, and the outdoor heat exchanger is held by this protrusion. The heat exchanger mounting surface of the bottom plate serving as the path had to be narrowed by the positioning protrusions, which hindered prompt drainage.

  In view of the above, the present invention provides an outdoor unit of an air conditioner that can prevent freezing in the drainage channel without blocking the drainage channel of the bottom plate by devising a holding mechanism that holds the heat exchanger. It is aimed.

  In order to achieve the above object, the present invention provides an outdoor unit in which a drain water drainage channel is formed on a bottom plate of a cabinet, wherein a main heat exchanger and an auxiliary heat exchanger having different effective lengths are arranged on the bottom plate. Are arranged adjacent to each other, and a holding mechanism for holding the main heat exchanger and the auxiliary heat exchanger on the bottom plate is provided, and the end of the auxiliary heat exchanger is used as a holding mechanism on the auxiliary heat exchanger side. A tube plate standing on the bottom plate is provided so as to be held, and a holding piece that protrudes toward the main heat exchanger side and holds the bottom portion of the main heat exchanger is provided on the tube plate.

  The holding piece may have any form as long as it can hold the main heat exchanger, but may be configured to have a drain hole that can drain water generated by the heat exchanger.

  Further, the main heat exchanger having a long effective length is bent into an L shape in plan view from the vicinity of the end of the auxiliary heat exchanger having a shorter effective length, and the bottom portion near the bent portion of the main heat exchanger. However, a configuration in which the holding piece is held by the holding piece may be adopted.

  Further, the main heat exchanger may be composed of a plurality of heat exchangers arranged adjacent to each other with their ventilation surfaces facing each other.

  In this case, it is desirable that the length of the holding piece is set to a length capable of holding the bottoms of the plurality of heat exchangers constituting the main heat exchanger.

  As described above, according to the present invention, the holding plate that protrudes toward the main heat exchanger and holds the bottom of the main heat exchanger is provided on the tube plate that holds the auxiliary heat exchanger. It is not necessary to provide a projection for holding the main heat exchanger in the channel, and accordingly, the drain channel can be prevented from freezing without reducing the area of the drain channel.

It is a perspective view of the baseplate of the outdoor unit of the air conditioner concerning the embodiment of the present invention. It is a perspective view of a tube sheet similarly. It is a perspective view which shows the state which incorporated only the auxiliary heat exchanger in the baseplate of the outdoor unit. It is a top view which shows the state which incorporated the main heat exchanger and the auxiliary heat exchanger in the bottom plate of the outdoor unit. It is AA sectional drawing of FIG. It is the perspective view seen from the right side of FIG. It is the perspective view seen from the left side of FIG.

  Hereinafter, embodiments of an outdoor unit of an air conditioner will be described based on the drawings of FIGS. 1 to 7. FIG. 1 is a perspective view of a bottom plate of an outdoor unit of an air conditioner. In the outdoor unit, a side wall (not shown) is erected along the periphery of the bottom plate 1, and a box-shaped cabinet is configured from a top plate (not shown) that closes the upper end portion of the side wall. In FIG. 1, only the bottom plate constituting the cabinet is shown, and the side walls and the top plate are omitted.

  On the bottom plate 1, although not shown, a partition plate (not shown) is provided as appropriate and is divided into left and right space spaces. The space on the right side of the partition plate is a machine room that accommodates a group of pipes (not shown) such as a compressor, a suction cup, and a four-way valve. The space on the left side of the partition plate is a heat exchange chamber in which the outdoor heat exchanger 2, the blower, and a support base (both not shown) that support the blower are accommodated.

  The bottom plate 1 has a rectangular shape whose lateral length in the width direction is about twice as long as the longitudinal length in the depth direction. As the material of the bottom plate 1, a metal plate such as a coated steel plate coated with a hot dip galvanized steel plate or a hot-dip aluminum-zinc alloy plated steel plate is employed. The bottom plate 1 is formed by pressing this metal plate.

  The bottom plate 1 is provided with a flange 3 that is bent in a stepped cross section from its bottom surface to its upper edge. The bottom surface of the bottom plate 1 is roughly composed of a lowermost surface 5 having a drainage hole 4, a low step surface 7 and a middle step surface 8 to be a drainage channel 6, a middle / high step surface 9, a high step surface 10, and an uppermost surface 11. It is formed in six steps.

  In FIG. 4, the region of the lowermost surface 5 is indicated by normal hatching, the region of the low step surface 7 is indicated by hatching with a close interval, the region of the middle step surface 8 is indicated by hatching with a rough interval, and the region of the middle and high step surface 9 Is indicated by hatching with further coarse spacing. The region of the high-level surface 10 is indicated by dashed hatching, and the region of the uppermost surface 11 is indicated by two-dot chain hatching.

  The region of the lowermost surface 5 is formed substantially at the center in the left-right direction of the bottom plate 1 and on the rear side in the front-rear direction, and is formed substantially below the heat exchanger 2. A drain hole 4 for discharging drain water is formed in the lowermost surface 5 so that all water generated in the bottom plate 1 can be drained.

  A low step surface 7 is disposed around the lowermost surface 5 via an inclined surface 12. The low step surface 7 constitutes a part of the drainage channel 6, and the water flowing from the middle step surface 8 which also becomes the drainage channel 6 is guided to the drainage hole 4 in the lowermost surface 5. The low step surface 7 is continuously formed around the lowermost surface 5 and around the uppermost surface 11 on which the support base of the blower is installed.

  The region of the middle step surface 8 is formed over almost the entire area of the bottom plate 1. A drainage channel 6 of the bottom plate 1 is formed by the middle step surface 8, the lower step surface 7, and the lowermost surface 5.

  The region of the middle and high step surface 9 is provided on the left side of the bottom plate 1 adjacent to the land portion forming the high step surface 10 in the inner region of the L-shaped heat exchanger 2 in plan view.

  The region of the high-level surface 10 is formed over substantially the entire area except for the L-shaped region in the plan view of the rear and left sides of the bottom plate 1 where the L-shaped heat exchanger 2 is arranged in plan view. A plurality of land portions 10a that are substantially rectangular in a plan view are arranged at intervals, and the high step surface 10 is formed by the land portions 10a. Part of the middle step surface 8 and the lower step surface 7 is formed between the plurality of land portions 10a, and a drainage channel 6 for water flowing down from the land portion 10a is formed.

  Positioning drawing portions 15 having a circular shape in a plan view and a cross-section having a trapezoidal shape are projected by drawing processing at the three land portions on the right side of the high step surface 10. One of the drawn portions 15 has a leg portion extending in four directions protruding from a circular outer peripheral portion in plan view. Further, screw holes 16 are formed in the central portions of the three positioning throttle portions 15.

  Further, a land portion 17 for attaching a support base for attaching a support base of the blower is formed at the center of the land portion in the region of the high step surface 10 in front of the drain hole 4. Further, at the four corners of the bottom plate 1, uppermost step portions 18 having the same height as the land portion 17 for attaching the support base and the throttle portion 15 for attaching the compressor are formed. A region of the uppermost surface 11 is formed by the land portion 17 for attaching the support base, the throttle portion 15 for attaching the compressor, and the uppermost step portion 18 at the four corners of the bottom plate.

  A mounting hole 19 is formed in the support base mounting land portion 17, and drainage holes 20 and 21 are formed in a region of the middle / high step surface 9 and a part of the middle step surface adjacent to the lowermost surface 5, respectively. Yes.

  In the rear region of the bottom plate 1, an inclined surface 12 is formed toward the lowermost surface 5 having the drain hole 4 formed in the center in the left-right direction, and a low step surface 7 is formed around the upper end. The left and right low step surfaces 7 are connected to the region of the middle step surface 8 at both left and right ends of the bottom plate 1 by an inclined surface 23 inclined downward toward the low step surface side.

  A heat exchanger 2 is arranged in an L-shaped heat exchanger installation area formed in a plan view on the rear and left sides of the bottom plate 1. The heat exchanger 2 includes a main heat exchanger 32 and an auxiliary heat exchanger 33 having different effective lengths arranged adjacent to each other with their ventilation surfaces facing each other. The main heat exchanger 32 further includes a first heat exchanger 32a and a second heat exchanger 32b arranged in the front-rear direction.

  Each of the heat exchangers 32 and 33 has a large number of radiating fins 34 arranged in parallel at equal intervals in the horizontal direction, and a plurality of stages of refrigerant pipes 35 penetrating the radiating fins. Are connected by a U-shaped connecting pipe 36 to form a meandering refrigerant flow path. Tube plates 37, 38, 39 made of steel plates are provided on the side surfaces of the heat exchanger 2, and these tube plates 37, 38, 39 connect the main heat exchanger 32 and the auxiliary heat exchanger 33 to the bottom plate 1, respectively. A part of the holding mechanism 44 is held.

  The holding mechanism 44 of the auxiliary heat exchanger 33 includes tube plates 37 and 38 disposed on the left and right sides of the auxiliary heat exchanger 33. The tube plates 37 and 38 of the auxiliary heat exchanger 33 are fixed to the flange of the bottom plate 1, the side wall of the cabinet, and further to the partition plate that divides the machine room and the heat exchange chamber with screws, screws, and the like.

  The holding mechanism 44 of the main heat exchanger 32 includes a tube plate 39 disposed on both sides of the main heat exchanger 32 and a tube plate 37 on the left side of the auxiliary heat exchanger 33 near the bent portion of the main heat exchanger 32. The holding piece 45 is configured to protrude to the main heat exchanger side 32 and hold the bottom of the main heat exchanger 32. That is, as the holding mechanism 44 of the main heat exchanger 32, the tube plate 37 on one side of the auxiliary heat exchanger 33 is used, and the holding piece 45 is projected from the tube plate 37 so that the intermediate portion of the main heat exchanger 32 To keep. More specifically, in the holding mechanism 44 of the main heat exchanger 32, the flanges of the bottom plate 1, the side walls of the cabinet, and the machine room are provided by the tube plates 39 located on both sides of the main heat exchanger 32 as in the conventional case. Is fixed to a partition plate that partitions the heat exchanger chamber by screws, screws, or the like, but the intermediate portion of the main heat exchanger 32 is held by a holding piece 45 using a tube plate 37 on the auxiliary heat exchanger 33 side. ing.

  As shown in FIG. 2, the tube plate 37 of the auxiliary heat exchanger 33 includes a tube plate portion 40 fixed to the side surface of the auxiliary heat exchanger 33 and an attachment plate portion 41 fixed to the flange of the bottom plate 1. It consists of a steel plate bent into a letter shape. The tube plate 37 is fastened to the flange 3 of the bottom plate 1 by fastening with a screw or a screw passing through a screw hole 41a formed in the mounting plate portion 41 and a through hole (not shown) of the flange 3. Is done. Insertion holes 40 a are formed in a plurality of stages in the height direction in the tube plate portion 40, and the tube end of the refrigerant tube 35 is inserted into the insertion hole 40 a, and after insertion of the tube end of the refrigerant tube 35, a U-shaped connecting tube 36 are connected. The lower portion of the tube plate portion 40 protrudes downward from the radiating fin 34 to form an L-shaped leg portion 42, and the leg portion 42 is erected on the middle stage surface 8 of the bottom plate 1 to support the auxiliary heat exchanger 33. doing.

  The auxiliary heat exchanger 33 has a plate shape and a flat shape, and is arranged along the back surface of the rear portion of the bottom plate 1. The effective length of the auxiliary heat exchanger 33 is substantially close to the left and right width of the bottom plate 1. The effective length of the main heat exchanger 32 is longer than the auxiliary heat exchanger 33 and is bent in an L shape in plan view, that is, a length close to the sum of the left and right widths and the front and rear widths of the bottom plate 1. Is done. The main heat exchanger 32 is bent into an L shape in plan view from the vicinity of the end of the auxiliary heat exchanger 33.

  Here, the effective length of the heat exchanger is defined by the length of the refrigerant tube 35 sandwiched between the tube plates on both sides. When the refrigerant pipe 35 sandwiched between the tube plates 39 on both sides is bent halfway like the main heat exchanger 32, the length along the refrigerant pipe becomes the effective length. When the refrigerant pipe 35 sandwiched between the left and right tube plates 37 and 38 is linear like the auxiliary heat exchanger 33, the linear length is an effective length.

  The holding piece 45 will be described in further detail. As shown in FIG. 2, the holding piece 45 includes a rib 46 formed on the lower side of the tube plate portion 40 in a bent manner on the opposite side in parallel to the mounting plate portion 41, and the rib 46. It is comprised from the holding | maintenance part 47 bent perpendicularly | vertically in the front-back direction from the upper end. A plurality of drain holes 48 for draining water falling from the main heat exchanger 32 are formed in the holding portion 47 at intervals in the front-rear direction. The length of the holding part 47 is set to a length that can hold the bottom part of the first heat exchanger 32a and the bottom part of the second heat exchanger 32b, and is formed to project forward.

  In the holding mechanism 44 of the auxiliary heat exchanger 33, the tube plate 38 fixed to the other side surface of the auxiliary heat exchanger 33 is erected in the region of the middle surface 8 of the bottom plate 1. The auxiliary heat exchanger 33 is positioned integrally formed by squeezing on the right inclined surface 23 connecting the lower step surface 7 around the lowermost surface 5 and the right middle step surface 8 so as to be continuous with the flange 3 of the bottom plate 1. It is placed on the protrusion 50.

  Further, the holding mechanism 44 of the main heat exchanger 32 has a leg portion of the right side tube plate 39 standing in the region of the middle step surface 8 on the right side, and a leg portion of the left tube plate 39 is a middle step surface of the left front portion. Eight areas are installed. A pair of legs 51 that are long in the front-rear direction are provided on the back surface of the bottom plate 1.

  In the above configuration, condensed water is generated on the surface of the component connected to the compressor by the operation of the refrigeration cycle, and even if this condensed water drops on the bottom plate 1, the low-stage surface is provided via the drainage channel 6 of the middle surface 8. 7. It is guided to the drainage channel 6 on the lowermost surface 5 and can be drained from the drainage hole 4. Therefore, water can be prevented from accumulating at the bottom of the machine room, and adverse effects due to moisture on the electrical components in the machine room can be prevented.

  At this time, as the holding mechanism 44 of the main heat exchanger 32, the tube plate 37 of the auxiliary heat exchanger 33 having a short effective length is used, and the holding piece 45 is provided on the tube plate 37 so as to project the main heat exchanger 32. Therefore, the drainage channel 6 of the bottom plate 1 does not need to be provided with a projection as in the prior art, and accordingly, the area of the drainage channel 6 is not reduced and the drainage efficiency is improved.

  Further, since the water generated in the main heat exchanger 32 can be dropped into the drainage channel 6 through the plurality of drain holes 48 formed in the holding piece 45, drainage becomes more efficient.

  As is apparent from the above description of the embodiment, the present invention is an outdoor unit in which the drain water drainage channel 6 is formed on the bottom plate 1 of the cabinet. Heat exchangers 33 are arranged adjacent to each other with their ventilation surfaces facing each other, and a holding mechanism 44 that holds the main heat exchanger 32 and the auxiliary heat exchanger 33 on the bottom plate 1 is provided. The holding mechanism 44 is provided with a tube plate 37 erected on the bottom plate 1 so as to hold the end portion of the auxiliary heat exchanger 33, and protrudes toward the main heat exchanger on the tube plate 37 so that the main heat exchange is performed. A holding piece 45 for holding the bottom of the vessel 32 is provided.

  According to the above configuration, as the holding mechanism 44 of the main heat exchanger 32, the tube plate 37 of the auxiliary heat exchanger 33 having a short effective length is used, and the holding piece 45 is protruded from the tube plate 37 so that the main heat Since the exchanger 32 is held, it is not necessary to provide a protrusion in the drainage channel 6 of the bottom plate 1, and the area of the drainage channel is not reduced correspondingly.

  The holding piece 45 may have any form as long as the main heat exchanger 32 can be held, but may employ a configuration including a drain hole 48 that can drain water generated by the heat exchanger. . By providing the drain hole 48, drainage can be performed more efficiently.

  Also, the main heat exchanger 32 having a long effective length is bent into an L shape in plan view from the vicinity of the end of the auxiliary heat exchanger 33 having a shorter effective length, and the bent portion of the main heat exchanger 32 is bent. You may employ | adopt the structure by which the near bottom part was hold | maintained by the said holding piece 45. FIG.

  Here, the main heat exchanger 32 may have a plate shape that is long in the left-right direction. In this case, the auxiliary heat exchanger 33 may be in the form of a plate facing the main heat exchanger 32. Further, as described above, when the L-shaped form is adopted in a plan view in which the main heat exchanger 32 is bent from the back side to the side of the bottom plate 1, by holding the vicinity of the bent portion with the holding piece 45, The main heat exchanger 32 can be held more stably. In this case, the auxiliary heat exchanger 33 may be similarly bent in an L shape, and the effective length of the auxiliary heat exchanger 33 is near the bent portion of the main heat exchanger 32. It may be a flat plate shape.

  Further, the main heat exchanger 32 may be a heat exchanger in which the refrigerant pipes are arranged in a row in the front-rear direction or in a plurality of rows. Furthermore, the main heat exchanger 32 may be composed of a plurality of heat exchangers. For example, the main heat exchanger 32 may be configured by a first heat exchanger 32a and a second heat exchanger 32b that are adjacently disposed with the ventilation surfaces facing each other.

  In this case, the length of the holding piece 45 is preferably set to a length capable of holding the bottoms of the plurality of heat exchangers 32a and 32b constituting the main heat exchanger 32. Thereby, a some heat exchanger can be hold | maintained more reliably. Further, the plurality of heat exchangers constituting the main heat exchanger may be constituted by three heat exchangers or four heat exchangers.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Bottom plate 2 Outdoor heat exchanger 3 Flange 4 Drain hole 5 Bottom surface 6 Drainage channel 7 Low step surface 8 Middle step surface 9 Middle and high step surface 10 High step surface 11 Top surface 10a Land portion 15 Restriction portion 17 Land portion for mounting the support base 18 Top surface step portion 19 Mounting holes 20, 21 Drain hole 23 Inclined surface 32 Main heat exchanger 33 Auxiliary heat exchanger 32 a First heat exchanger 32 b Second heat exchanger 34 Radiation fin 35 Refrigerant pipe 36 Connecting pipe 37 , 38, 39 Tube plate 40 Tube plate portion 40a Insertion hole 41 Mounting plate portion 41a Screw hole 42 Leg portion 44 Holding mechanism 45 Holding piece 46 Rib 47 Holding portion 48 Drain hole 50 Positioning protrusion 51 Leg

Claims (5)

  In an outdoor unit in which a drain water drainage channel is formed on the bottom plate of the cabinet, a main heat exchanger and an auxiliary heat exchanger having different effective lengths are arranged adjacent to each other with their ventilation surfaces facing each other, and the main heat A holding mechanism for holding the exchanger and the auxiliary heat exchanger on the bottom plate is provided, and as the holding mechanism on the auxiliary heat exchanger side, the holding plate is erected on the bottom plate so as to hold the end of the auxiliary heat exchanger. An outdoor unit for an air conditioner, comprising a tube plate, wherein the tube plate is provided with a holding piece that protrudes toward the main heat exchanger and holds the bottom of the main heat exchanger.   The outdoor unit of the air conditioner according to claim 1, wherein a drain hole is formed in the holding piece.   The main heat exchanger having a long effective length is bent into an L shape in plan view from the vicinity of the end of the auxiliary heat exchanger having a shorter effective length, and the bottom near the bent portion of the main heat exchanger is The outdoor unit according to claim 1, wherein the outdoor unit is held by the holding piece.   The outdoor unit according to any one of claims 1 to 3, wherein the main heat exchanger is composed of a plurality of heat exchangers arranged adjacent to each other with their ventilation surfaces facing each other.   The outdoor unit according to claim 4, wherein a length of the holding piece is set to a length capable of holding bottoms of a plurality of heat exchangers constituting the main heat exchanger.

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