JP5461213B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner in which a compressor or the like is disposed on a bottom plate of a housing.

  In general, an outdoor unit of an air conditioner including a compressor and a heat exchanger arranged on a bottom plate of a housing is known (see, for example, Patent Document 1). This type of outdoor unit is connected to the indoor heat exchanger of the indoor unit with a refrigerant pipe to circulate the refrigerant. Therefore, the refrigerant pipe is led out to the front plate or the bottom plate of the casing of the outdoor unit. A lead-out hole (knockout hole) is formed, and when the outdoor unit is installed on site, the lead-out hole suitable for the installation location is punched and opened.

Japanese Patent No. 3495499

By the way, in the conventional structure, since the lead-out hole was formed in the bottom plate, a mold for press-molding the lead-out hole was required, and there was a problem that the manufacturing process and the manufacturing cost increased. Moreover, when the lead-out hole formed in the bottom plate is punched on site, the work is performed in a narrow place, and workability is deteriorated.
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an outdoor unit of an air conditioner that can easily derive a refrigerant pipe from a front plate or a bottom plate of a housing with a simple configuration.

  In order to achieve the above object, the present invention provides an outdoor unit of an air conditioner including a compressor and a heat exchanger disposed on a bottom plate of a housing, and a front panel disposed on the front side of the housing. A substantially L-shaped panel member disposed between a lower end portion of the front panel and a front end portion of the bottom plate, and the panel member includes a front plate portion connected to a lower end portion of the front panel, The present invention is characterized in that a knockout hole is provided in each of the bottom plate portions connected to the front end portion of the bottom plate.

  In this configuration, the front panel may be disposed with a space in the depth direction and the height direction with respect to the bottom plate, and the panel member may be disposed so as to cover the space. The panel member may include a bent portion obtained by step-bending a tip of the bottom plate portion, and the bent portion may be extended on the front end portion of the bottom plate. Moreover, the support | pillar arrange | positioned at the four corners of the said housing may be provided, and the said panel member may be fixed to the said support | pillar arrange | positioned at the front side.

  The panel member is divided into two in the width direction of the housing, and a knockout hole for leading out electrical wiring is formed on one side, and a knockout hole for leading out refrigerant piping is formed on the other side. It may be formed. In addition, a pipe connection portion fixed to the column may be provided above the other panel member in which the knockout hole for leading out the refrigerant pipe is formed.

  According to the present invention, a substantially L-shaped panel member disposed between the lower end portion of the front panel and the front end portion of the bottom plate is provided, and the panel member includes a front plate portion continuous with the lower end portion of the front panel, and Since the knockout holes are provided in the bottom plate portions connected to the front end portion of the bottom plate, it is not necessary to provide the knockout holes in the bottom plate and the front panel, and the configuration of the bottom plate and the front panel can be simplified. In addition, the panel member provided with the knockout hole is arranged between the lower end of the front panel and the front end of the bottom plate. Can be punched out.

It is an external appearance perspective view of the outdoor unit of the air conditioning apparatus which shows one embodiment of this invention. It is a front view of an outdoor unit in the state where a front panel was removed. It is a sectional side view of an outdoor unit. It is a top view which shows the internal structure of an outdoor unit. It is a disassembled perspective view which shows the structure of a baseplate. It is a bottom view which shows the structure of a baseplate. It is a perspective view which shows the front lower part of a housing. It is side sectional drawing which shows the front lower part of a housing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The air conditioner according to this embodiment includes an outdoor unit 10 and an indoor unit (not shown), and performs a cooling operation and a heating operation by flowing a refrigerant through a refrigerant circuit connected by a refrigerant pipe. The outdoor unit 10 is installed outside, exchanges heat with outdoor air, condenses the refrigerant during the cooling operation and releases heat to the outside air, and evaporates the refrigerant during the heating operation and takes in heat from the outside air. In addition, the directions such as up and down and left and right described below indicate directions when the outdoor unit 10 is viewed from the front side in a state where the outdoor unit 10 is installed.

FIG. 1 is an external perspective view of the outdoor unit 10, and FIG. 2 is a front view of the outdoor unit 10 with the front panel removed. The outdoor unit 10 includes a unit case (housing) 11 having a substantially rectangular parallelepiped box shape, and the unit case 11 is bridged and fixed on a pair of leg members 13 and 13 extending in the front-rear direction, The bottom plate 12 includes support columns 14 extending in the vertical direction from four corners and a front panel 15.
A heat exchanger 21 to be described later is disposed on the bottom plate 12, and the back surface and the left and right side surfaces of the unit case 11 are formed by the heat exchanger 21. In addition, a blower 22 and a bell mouth 25 are arranged around the blower 22 at the upper part of the heat exchanger 21, and a fan guard for preventing contact with the blower 22 in the blowout opening 25 </ b> A of the bell mouth 25. 26 is arranged. A decorative panel 27 provided with a heat insulating material such as foamed polystyrene is provided around the bell mouth 25.

The front panel 15 includes an upper panel 15A and a lower panel 15B which are divided into two parts in the vertical direction. The upper panel 15A and the lower panel 15B are bridged and fixed between the columns 14 and 14 on the front side. Further, lead-out panels (panel members) 18 and 19 fixed to the front columns 14 and 14 are provided side by side at the lower portion of the front panel 15, that is, the lower end portion of the lower panel 15B. The panel members 18 and 19 are respectively formed with knockout holes that are punched and opened when the refrigerant piping and the electrical wiring are led out from the unit case 11.
As shown in FIG. 2, refrigerant circuit components 32 such as compressors 30 </ b> A and 30 </ b> B, a valve body such as a four-way valve 31 and an expansion valve are piped on the front side of the unit case 11. An electrical box 34 for controlling various devices of the outdoor unit 10 is disposed above the compressors 30A, 30B and the like. For this reason, by removing the front panel 15, the operator can easily perform maintenance work of the electrical components in the compressors 30 </ b> A and 30 </ b> B and the electrical equipment box 34 from the front side.

Next, the arrangement configuration of each device in the unit case 11 will be described.
FIG. 3 is a side sectional view of the outdoor unit 10, and FIG. 4 is a top view showing an internal configuration of the outdoor unit 10.

As shown in FIG. 3, the blower 22 includes a fan motor 23 disposed above the heat exchanger 21, and a propeller fan (impeller) 24 attached to the shaft of the fan motor 23. . A connection member (not shown) that connects the support columns 14, 14 is provided between the adjacent support columns 14, 14 at a position corresponding to the upper end of the heat exchanger 21, and the fan motor 23 spans between the connection members. The support frame 16 is fixed.
When the propeller fan 24 is driven to rotate by the fan motor 23, as shown by the arrow X in the periphery of the outdoor unit 10, more specifically, as shown by the arrow X in FIGS. Outside air is sucked into the unit case 11 from the side and right side, and is discharged outside through the blowout opening 25 </ b> A of the bell mouth 25 provided on the upper surface of the unit case 11. That is, the outdoor unit 10 is configured as a top blowing type that blows out air after heat exchange from the top surface.

  As shown in FIG. 4, the unit case 11 is formed in a substantially rectangular shape in which the length L1 in the depth direction is longer than the length L2 in the width direction. Further, the blower 22 is arranged so that the rotation axis O of the propeller fan 24 is located at a position that is approximately equal distance from the back side and both side surfaces of the unit case 11. Therefore, in this configuration, the blower 22 is disposed at a position where the rotation shaft O of the propeller fan 24 has moved to the back side, so that a space is formed on the front side of the blower 22 accordingly. An electrical box 34 is disposed in the space formed in front of the blower 22, and the electrical box 34 is disposed at a position overlapping with the blower 22 and the bell mouth 25 in the height direction, and is fixed to the columns 14 and 14. Has been. As a result, the electrical box 34 passes through the heat exchanger 21 and does not impede the flow of air blown from the blower 22, and the ventilation resistance in the unit case 11 can be reduced. The blowing noise can be reduced without increasing the size of the fan.

  On the bottom plate 12 of the unit case 11, a heat exchanger 21 formed by being bent in a substantially U-shaped cross section is disposed. The heat exchanger 21 extends from the left side surface of the unit case 11 to the back surface and the right side surface. Are arranged. In the present embodiment, the heat exchanger 21 is integrally formed by bending in a substantially U-shaped cross section. For example, two heat exchangers formed in a substantially L-shaped cross section are used. May be arranged opposite to each other in a substantially U-shaped cross section.

  Inside the heat exchanger 21, an accumulator 35, an oil separator 36, and a receiver tank 37 that constitute a part of the refrigerant circuit together with the compressors 30 </ b> A and 30 </ b> B and the refrigerant circuit component 32 are arranged on the bottom plate 12. Has been. The frame 17 is fixed to the center of the upper portion of the accumulator 35. The frame 17 extends from the upper end of the accumulator 35 and is fixed to a connecting member that connects the columns 14 and 14, and prevents the accumulator 35 from swinging. ing.

  These accumulator 35, oil separator 36 and receiver tank 37 are pressure vessels for temporarily storing refrigerant or refrigerating machine oil, and have a low maintenance frequency. On the other hand, since the compressors 30A and 30B and the refrigerant circuit component 32 described above include electric elements such as a motor and a coil, maintenance frequency is high. For this reason, in this configuration, a partition plate 38 extending upward from the bottom plate 12 to the lower end portion of the electrical box 34 is provided, and by this partition plate 38, the inside of the unit case 11 is heat exchange chamber 39 as shown in FIG. And the machine room 40. The machine room 40 accommodates compressors 30A and 30B and refrigerant circuit components 32 having a high maintenance frequency, and the heat exchange chamber 39 has a heat exchanger 21, an accumulator 35, an oil separator 36, and a low maintenance frequency. A receiver tank 37 is accommodated. The partition plate 38 prevents raindrops from being directly applied to the devices accommodated in the machine room 40.

  As shown in FIG. 5, the bottom plate 12 is formed in a corrugated plate shape having projections and depressions extending in the width direction, and includes a front bottom plate 12 </ b> A and a rear bottom plate 12 </ b> B that are divided into front and rear parts. . The front bottom plate 12A and the rear bottom plate 12B are bridged and fixed on the pair of leg members 13 and 13. Although the front bottom plate 12A and the rear bottom plate 12B may be formed of the same sheet metal material and the same plate thickness, in this embodiment, the sheet metal of the front bottom plate 12A on which the compressors 30A and 30B are disposed is used as the rear bottom plate 12B. The strength of the front bottom plate 12A is increased.

  The front bottom plate 12A and the rear bottom plate 12B are each provided with a single recess 12C extending in the width direction formed by trapezoidal bending for reinforcement, whereby the front bottom plate 12A and the rear bottom plate 12B are formed in a substantially corrugated shape. Has been. The recesses 12C are respectively formed on the front bottom plate 12A and the rear bottom plate 12B using the same press die. In the present embodiment, the bottom plate 12 is divided into two parts in the front-rear direction, and a single recess 12C having the same shape extending in the width direction is formed in each of the front bottom plate 12A and the rear bottom plate 12B. Thereby, each recessed part 12C can be formed with a partial type press die, and compared with what forms a plurality of reinforcing grooves in a single bottom plate using the whole die, labor for manufacturing the bottom plate and Material costs can be greatly reduced.

The front end portion 12G of the front bottom plate 12A is formed in a substantially U-shaped cross section by folding the front end 12G1 of the plate material downward and then folding it back. Similarly, the rear end portion 12H of the rear bottom plate 12B is formed in a substantially U-shaped cross-section by folding the front end 12H1 of the plate material downward and then folding it forward. This further increases the strength of the front bottom plate 12A and the rear bottom plate 12B.
Further, Z-bending (step bending) processing is performed on the rear end portion of the front bottom plate 12A and the front end portion of the rear bottom plate 12B, which are split surfaces of the bottom plate 12, to form bent portions 12D and 12E. . The bent portions 12D and 12E are formed so as to be substantially parallel to the concave portion 12C and are located below the concave portion 12C. The bent portions 12D and 12E are bent to substantially the same depth as the front end portion 12G of the front bottom plate 12A and the rear end portion 12H of the rear bottom plate 12B. The bending depths of the bent portions 12D and 12E, the front end portion 12G of the front bottom plate 12A, and the rear end portion 12H of the rear bottom plate 12B are made deeper than the depth of the recess 12C to further increase the strength of the front bottom plate 12A and the rear bottom plate 12B. ing. In this structure, as shown in FIG. 4, the accumulator 35 is arrange | positioned so that bending part 12D, 12E may be straddled. As a result, the accumulator which is disposed at the substantially central portion of the bottom plate 12 and increases in weight because the refrigerant is stored is disposed across the bending portions 12D and 12E having high strength due to the bending process. Therefore, it is possible to prevent the central portion of the bottom plate 12 from being bent by the weight of the accumulator.
The front bottom plate 12A and the rear bottom plate 12B are provided with attachment portions 12F having screw holes at front and rear ends of both side edge portions, respectively. These mounting portions 12F are provided so as to be at substantially the same height as the recess 12C from the mounting surface of the bottom plate 12, and are mounted on the upper surfaces 13A of the leg members 13 and 13 together with the recess 12C.

Leg members 13, 13 are formed of channel steel or the like. In order to make the left and right of the leg members 13 and 13 into a common part, the upper surface 13A of the leg members 13 and 13 is formed with a plurality of screw holes at positions corresponding to the screw holes provided on the left and right ends of the bottom plate 12. Have been provided. Further, a plurality of fasteners 13B formed integrally with the leg members 13, 13 by cutting and raising are provided on the inner side surfaces of the leg members 13, 13, and the bent portions 12D, 12E and the front portions are provided on these fasteners 13B. The front end 12G1 of the front end 12G of the bottom plate 12A and the front end 12H1 of the rear end 12H of the rear bottom plate 12B are screwed.
Further, as shown in FIG. 6, reinforcing members B1 and B2 formed in a substantially Z shape are screwed to the bottom plate 12 and are provided below the front bottom plate 12A and the rear bottom plate 12B. B2 prevents the bottom plate 12 from being bent in the depth direction, and the strength of the bottom plate 12 is increased.

By the way, the outdoor unit 10 is provided with the panel members 18 and 19 described above at the lower part of the unit case 11. As shown in FIG. 7, the panel members 18 and 19 include front plate portions 18A and 19A that are continuous with the lower end portion 15B1 (FIG. 1) of the lower panel 15B, and bottom plate portions 18B and 18B that are continuous with the front end portion 12G of the front bottom plate 12A, respectively. 19B and a substantially L-shaped cross section. One panel member 18 is formed with two large and small knockout holes 50A, 50B, 51A, 51B for leading out electrical wiring in the front plate portion 18A and the bottom plate portion 18B, respectively. The other panel member 19 is formed with large knockout holes 52 and 53 for leading out the refrigerant piping in the front plate portion 19A and the bottom plate portion 19B, respectively.
In the present embodiment, one panel member 18 screws the left edge of the front plate portion 18A to the support column 14, and screws the upper edge of the front plate portion 18A to the lower end portion 15B1 (FIG. 1) of the lower panel 15B. And fixed. Similarly, the other panel member 19 has the right edge of the front plate portion 19A screwed to the support column 14, and the upper edge of the front plate portion 19A screwed to the lower end portion 15B1 (FIG. 1) of the lower panel 15B. And fixed.

Further, on the other panel member 19, a valve base (pipe connection part) 45 fixed to the support column 14 on the front left side of the unit case 11 is provided. Service valves 46, 47 and 48 are concentrated on the valve base 45. The service valves 46, 47, and 48 are a gas pipe service valve 46, a liquid pipe service valve 47, and an oil balance pipe service valve 48, respectively. One end of the valve base 45 is screwed to the column 14, and the gas pipe service valve 46 having the highest piping pressure is disposed at a position closest to the portion screwed to the column 14. One end of a support member 49 is screwed near the center of the valve base 45, and the other end of the support member 49 is fixed to the front bottom plate 12A to improve the strength of the valve base 45. The support member 49 may be configured to use a reinforcing metal fitting such as an L-shaped metal fitting.
As described above, since the gas pipe service valve 46, the liquid pipe service valve 47, and the oil balance pipe service valve 48 are concentrated on the valve base 45 on the other panel member 19, these service valves are arranged. The refrigerant piping can be easily routed when the refrigerant piping connected to is led out through the knockout holes 52 and 53.

  In this configuration, the lower panel 15B of the front panel 15 is arranged with spaces A in the depth direction and the height direction with respect to the front bottom plate 12A, as shown in FIG. It arrange | positions so that the space A may be covered. In this configuration, the bottom plate 12 can be formed smaller than the installation area of the unit case 11. As described above, since various heavy objects such as the compressors 30 </ b> A and 30 </ b> B are placed on the bottom plate 12, the manufacturing cost is increased by increasing the plate thickness. In this configuration, the bottom plate 12 can be reduced by disposing the panel members 18 and 19 formed in an L shape between the lower panel 15B of the front panel 15 and the front bottom plate 12A. Manufacturing costs can be reduced.

  As shown in FIG. 8, the panel members 18, 19 have the bottom plate portions 18 </ b> B, 19 </ b> B bent upward at the tips. Specifically, the panel members 18 and 19 are united with the rising portions 18C and 19C formed by bending the tip end portions of the bottom plate portions 18B and 19B upward at a substantially right angle, and the leading end portions of these rising portions 18C and 19C. Bending portions 18D and 19D formed by being bent substantially horizontally in the depth direction of the case 11 are provided. In this configuration, when the panel members 18 and 19 are fixed to the unit case 11, the rising portions 18C and 19C abut against the end surface 12G2 of the front end portion 12G of the front bottom plate 12A, and the bent portions 18D and 19D are connected to the front bottom plate 12A. It extends on the front end portion 12G and overlaps with the upper surface 12G3 of the front end portion 12G. According to this configuration, since the bent portions 18D and 19D are overlapped with the upper surface 12G3 of the front end portion 12G, the tips (bending portions 18D and 19D) of the bottom plate portions 18B and 19B are hooked on the upper surface 12G3 of the front end portion 12G. Thus, the front plate portions 18A and 19A can be screwed, and attachment / detachment work can be easily performed. Further, since the rising portions 18C and 19C are in contact with the end surface 12G2 of the front end portion 12G of the front bottom plate 12A, even when a load is applied to the panel members 18 and 19 in the depth direction of the unit case 11. Further, when the rising portions 18C and 19C are abutted against the end face 12G2 of the front end portion 12G, deformation and distortion of the panel members 18 and 19 can be prevented.

  As described above, according to the present embodiment, the front panel 15 disposed on the front side of the unit case 11, the lower end 15B1 of the lower panel 15B of the front panel 15, and the front end 12G of the front bottom plate 12A The panel members 18 and 19 are arranged between the front plate portions 18A and 19A and the front end of the front bottom plate 12A, which are connected to the lower end portion 15B1 of the lower panel 15B. Since the knockout holes 50A, 50B, 51A, 51B, 52, and 53 are provided in the bottom plate portions 18B and 19B connected to the portion 12G, it is not necessary to provide the knockout holes in the front panel 15 of the bottom plate 12, and the front panel of the bottom plate 12 is provided. The configuration of 15 can be simplified. Further, the panel members 18 and 19 provided with the knockout holes 50A, 50B, 51A, 51B, 52, and 53 are disposed between the lower end portion 15B1 of the lower panel 15B and the front end portion 12G of the front bottom plate 12A. By removing the panel members 18 and 19 and performing the work, it is possible to easily punch out the knockout hole even at the site.

  Further, according to the present embodiment, the front panel 15 is disposed with a space A in the depth direction and the height direction with respect to the front bottom plate 12A, and the panel members 18 and 19 are disposed so as to cover the space A. Therefore, the bottom plate 12 (the front bottom plate 12A and the rear bottom plate 12B) can be formed smaller than the installation area of the unit case 11, and the manufacturing cost of the bottom plate 12 can be reduced accordingly.

  Further, according to the present embodiment, the panel members 18 and 19 include the bent portions 18D and 19D in which the tips of the bottom plate portions 18B and 19B are stepped upward, and the bent portions 18D and 19D are the front end portions of the front bottom plate 12A. The front plate portions 18A and 19A are screwed in a state where the tips (bending portions 18D and 19D) of the bottom plate portions 18B and 19B are hooked on the upper surface 12G3 of the front end portion 12G because they are extended on the upper surface 12G3 of the 12G. Can be easily attached and detached.

  In addition, according to the present embodiment, the columns 14 and 14 are provided at the four corners of the unit case 11, and the panel members 18 and 19 are fixed to the pair of columns 14 and 14 disposed on the front side. The structure for attaching and detaching the panel members 18 and 19 can be simplified.

  In addition, according to the present embodiment, the panel members 18 and 19 are divided into two parts in the width direction of the unit case 11, and the knockout holes 50 </ b> A, 50 </ b> B for leading electrical wiring are provided in one panel member 18. 51A and 51B are formed, and the other panel member 19 is formed with knockout holes 52 and 53 for leading out the refrigerant pipe. Therefore, the electrical wiring and the refrigerant pipe are connected and led out from the front side of the unit case 11. Can be easily performed.

  In addition, according to the present embodiment, the valve base 45 fixed to the column 14 is provided above the other panel member 19 in which the knockout holes 52 and 53 for leading out the refrigerant pipe are formed. By arranging the service valves on the valve base 45 in a concentrated manner, the refrigerant pipes can be easily routed when the refrigerant pipes connected to the service valves are led out through the knockout holes 52 and 53. it can.

10 Outdoor unit 11 Unit case (frame)
12 Bottom plate 12A Front bottom plate 12B Rear bottom plate 12C Recessed portion 12G Front end portion 12G2 End surface 12G3 Upper surface 13 Leg member 13A Upper surface 14 Column 15 Front panel 15A Upper panel 15B Lower panel 15B1 Lower end portion 18, 19 Panel member 18A, 19A Front plate portion 18B19 Bottom plate part 18C, 19C Rising part 18D, 19D Bending part 21 Heat exchanger 30A, 30B Compressor 35 Accumulator 45 Valve stand (pipe connection part)
50A, 50B, 51A, 51B, 52, 53 Knockout Hall

Claims (6)

In an outdoor unit of an air conditioner including a compressor and a heat exchanger disposed on a bottom plate of a housing,
A front panel disposed on the front side of the housing, and a substantially L-shaped panel member disposed between a lower end portion of the front panel and a front end portion of the bottom plate,
An outdoor unit of an air conditioner, wherein the panel member is provided with knockout holes in a front plate portion connected to a lower end portion of the front panel and a bottom plate portion connected to a front end portion of the bottom plate.   2. The front panel according to claim 1, wherein the front panel is disposed with a space in the depth direction and the height direction with respect to the bottom plate, and the panel member is disposed to cover the space. Outdoor unit of air conditioner.   The air conditioner according to claim 1 or 2, wherein the panel member includes a bent portion obtained by step-bending a tip of the bottom plate portion, and the bent portion is extended on a front end portion of the bottom plate. Outdoor unit.   The outdoor unit of the air conditioner according to any one of claims 1 to 3, further comprising columns disposed at four corners of the housing, wherein the panel member is fixed to the columns disposed on the front side. .   The panel member is divided into two in the width direction of the casing, and a knockout hole for leading out electrical wiring is formed on one side, and a knockout hole for leading out refrigerant piping is formed on the other side. The outdoor unit of the air conditioning apparatus according to any one of claims 1 to 4, wherein the outdoor unit is provided.   6. The air conditioner according to claim 5, wherein a pipe connection portion fixed to the support column is provided above the other panel member in which a knockout hole for leading out the refrigerant pipe is formed. The outdoor unit of the device.

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