JP7600645B2 - Air conditioner outdoor unit - Google Patents

Description

The present invention relates to an outdoor unit of an air conditioner, and more specifically, to a heat exchanger disposed within the outdoor unit.

Most outdoor units of air conditioners (hereafter sometimes simply referred to as "outdoor units") have a rectangular parallelepiped housing. The inside of the housing is divided by a partition into a blower chamber (also called a heat exchanger chamber) that houses the heat exchanger and blower, and a machine chamber that houses the compressor.

Normally, the heat exchanger is arranged in an L-shape from the back to the side of the blower room. For models with large air conditioning capacity, the heat exchangers are arranged in three rows, for example an outer row, a middle row, and an inner row, to obtain the desired air conditioning capacity.

When assembling the outdoor unit, after the three rows of heat exchangers are mounted, for example when it is transported to another process, the ends of each row (the U-shaped tubes connected to the tube ends) are not fixed to each other and are therefore unstable. As a result, the heat exchangers in each row vibrate and collide with each other due to shocks and vibrations during transport, which can damage the surface of the heat exchanger (the tips of the fins through which the refrigerant piping is inserted), or the heat exchangers in the inner and outer rows can fall over and their tips can come into contact with the floor or other surface and be damaged.

To prevent this, the ends of each row are secured with binders or fasteners such as cable ties to prevent the heat exchangers in each row from vibrating individually, thereby increasing the strength of the entire heat exchanger.

However, in the three-row heat exchanger illustrated above, the length of the heat exchanger in the direction from the back to the side of the blower chamber (hereinafter also referred to as the width of the heat exchanger) is different for each row, so the tip of the inner row may be located further back than the tip of the outer row when viewed from the front of the housing. If the tips of the rows are not aligned and there is a step, it is difficult to secure (connect) each tip with a cable tie or fastener.

Patent document 1 discloses a spacer that is attached to the header portion of a heat exchanger, but this spacer is for a single-row heat exchanger and cannot be applied to multiple-row heat exchangers.

JP 2014-137157 A (FIGS. 3 and 4)

The objective of the present invention is to make it possible to easily fix (connect) the ends of multiple rows of heat exchangers in an outdoor unit for an air conditioner, even if the ends of the rows are not aligned and there is a step.

In order to solve the above problems, the present invention provides an outdoor unit for an air conditioner having a rectangular parallelepiped housing in which heat exchangers formed to run from the back surface to the side surface within the housing are arranged in multiple rows including an outer row and an inner row, the outdoor unit comprising a buffer block arranged between the back surface of a front panel arranged on the front surface of the housing and each end of the heat exchangers, the buffer block integrally comprising a first engagement surface having a first fitting groove formed therein into which a U-shaped tube provided at the end of at least the outer row fits, and a second engagement surface having a second fitting groove formed therein into which a U-shaped tube provided at the end of the inner row fits , the groove width of the second fitting groove being greater than the groove width of the first fitting groove .

According to the present invention, in an outdoor unit of an air conditioner that has multiple rows of heat exchangers, even if there is a step at the end of each row, those ends can be easily fixed (connected) to each other.

1 is an external perspective view showing an outdoor unit of an air conditioner according to an embodiment of the present invention. FIG. 2 is a perspective view showing the internal structure of the outdoor unit with the front, side and top panels removed. FIG. 3 is an enlarged perspective view of the electrical equipment storage section of FIG. 2 . FIG. 4 is a side view showing a power terminal board and a pipe connection unit arranged on a side surface of the outdoor unit. 5 is a side view similar to FIG. 4, showing a state in which a power cord is connected to the power terminal board. 6 is an enlarged view of a power cord connection portion for the power terminal board in FIG. 5 . FIG. FIG. 4 is a perspective view showing the power terminal board with a terminal board cover attached thereto. FIG. 4 is a perspective view showing the terminal board cover, the metal cover for preventing the spread of fire, and the side panel, separated from each other. FIG. 4 is a perspective view showing a cord clamp provided in the outdoor unit. FIG. FIG. FIG. FIG. 4 is a front perspective view of a state in which the buffer block of the outdoor unit is attached to a heat exchanger. FIG. 4 is a front perspective view of the buffer block removed from the heat exchanger. FIG. FIG. 4 is a perspective view of a control board provided in the outdoor unit as viewed from below. FIG. 4 is a perspective view of the control board flipped 180 degrees.

Next, several embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these.

First, referring to FIG. 1, the outdoor unit 1 according to this embodiment has a rectangular parallelepiped housing 10. That is, the housing 10 has six sides: a bottom, a front, a back, a left side, a right side, and a top. FIG. 1 shows a front panel 11 located on the front and left side, a right side panel 12 (see FIG. 2) located on the right side and part of the back, and a top panel 13 located on the top.

Figure 2 shows the base substrate 14 that is placed on the bottom surface of the housing 10. The interior of the outdoor unit 1 is divided by a partition plate 16 that is erected on the base substrate 14 into a machine chamber 17 that houses a compressor 171, an accumulator 172, etc., and a blower chamber 18 that has a heat exchanger 180 and a blower fan 190.

Referring to Figures 1 to 4, the piping connection unit 20 is disposed on the side panel 12 side of the housing 10. The side panel 12 also has an opening (hereinafter also referred to as the opening surface 301) for the board storage section 30, which will be described later. The piping connection unit 20 and the opening surface 301 of the board storage section 30 are covered by a piping cover 15. The piping cover 15 is removable.

The pipe connection unit 20 and the board storage section 30 may be arranged on the left side of the housing 10. In any case, arranging the pipe connection unit 20 and the board storage section 30 close to each other on the same side of the housing 10 contributes to the miniaturization of the outdoor unit 1 and makes maintenance, etc. easier.

This outdoor unit 1 is a multi-type outdoor unit to which five indoor units (not shown) can be connected. Therefore, the piping connection unit 20 is provided with connection valves for the five indoor units. Furthermore, a power terminal board 31 and a display board 33 are stored in the board storage section 30. The power terminal board 31 and the display board 33 are arranged so that they can be seen from the opening surface 301 of the board storage section 30 (hereinafter, also referred to as being arranged so as to face the opening surface 301). Therefore, an operator can access the power terminal board 31 from the opening surface 301 of the board storage section 30, and can also operate the display board 33.

The power supply terminal board 31 is provided with six terminal blocks 32 (32a to 32f). With reference to Figures 5 and 7, of these, terminal block 32a is a terminal block for the main power supply to which the main power supply cord MC of the outdoor unit 1 is connected, and the remaining terminal blocks 32b to 32f are terminal blocks for the indoor units to which the power supply cords SC (SC1 to SC5) of the indoor units are connected. The main power supply cord MC supplies power to the outdoor unit 1 from an external source (not shown).

In this embodiment, the power terminal board 31 is arranged in two levels, an upper level and an lower level, with the lower level having a terminal block row in which four terminal blocks 32a to 32d are arranged side by side. The upper level has a terminal block row in which two terminal blocks 32e and 32f are arranged side by side.

In addition, a display board 33 is disposed beside the terminal block 32f on the upper level of the power supply terminal board 31. The display board 33 is essentially a function setting board, and is provided with a group of switches 331 for setting the outdoor unit 1 to an operation mode such as quiet operation, energy saving operation, test operation, etc. The display board 33 is also provided with an indicator 332 such as an LED that displays the operation mode, etc.

[Terminal board cover]
The display board 33 is operated by an operator. As the outdoor unit 1 becomes smaller, if the display board 33 and the terminal block 32 are arranged close to each other, the distance between them becomes narrow, and there is a risk that an operator may accidentally touch the terminal block 32 to which a main power cord or the like carrying a high voltage is connected when operating the display board 33.

The outdoor unit 1 is therefore equipped with a terminal board cover 40 as shown in Figures 8 and 9. This terminal board cover 40 is provided on the side panel 12 so as to cover the terminal blocks 32 (32a to 32f), and a notch 41 is formed in a portion of the terminal board cover 40. Even though the terminal board cover 40 is provided, the formation of this notch 41 allows the operator to operate the display board 33 without removing the terminal board cover 40.

In this embodiment, the terminal board cover 40 has two engagement claws 421 at the left and right of its lower part that engage with engagement grooves 122 formed on the side panel 12, and a screw insertion hole 422 is drilled in one side of the terminal board cover 40.

As a result, the terminal board cover 40 covers the power terminal board 31 and is attached to the side panel 12 by engaging the engagement claws 421 with the engagement grooves 122 and screwing the screw insertion holes 422 with male screws 423, but the display board 33 can be accessed through the cutouts 41.

This prevents accidental contact with the terminal block 32 when operating the display board 33. When operating the terminal block 32, the terminal board cover 40 can be easily removed by simply removing the male screw 423.

The terminal board cover 40 is made of sheet metal, and preferably has ventilation louvers 424 formed in the area corresponding to the terminal block 32.

As shown in FIG. 1, the opening surface 301 of the piping connection unit 20 and the board storage section 30 is covered by the piping cover 15, but as shown in FIG. 9, a metal cover 430 is provided on the inner surface of the piping cover 15 in the area corresponding to the terminal board cover 40 to prevent the spread of fire.

More specifically, the metal cover 430 has a portion (cutout covering portion 432) that corresponds to the cutout 41 of the terminal board cover 40, and is provided so as to cover the cutout 41. The terminal board cover 40 covers the terminal blocks 32 (32a to 32f) and also covers the opening surface 301 of the circuit board storage section 30. However, since the terminal board cover 40 has the cutout 41, it is unable to cover the entire opening surface 301. On the other hand, since the metal cover 430 covers the cutout 41, it also functions as a cutout cover. Therefore, the terminal board cover 40 and the metal cover 430, which is the cutout cover, can cover the entire opening surface 301 of the circuit board storage section 30.

If the terminal board cover 40 is made of a flame-retardant material (e.g., metal), it can be combined with the metal cover 430 to form a cover for preventing the spread of fire. The terminal board cover 40 is formed to rise from the locations where the engagement claws 421 and the like are provided so that it is a predetermined distance away from the side panel 12, thereby covering the terminal blocks 32 (32a to 32f) while maintaining an insulating distance from the power cord.

The piping cover 15 has a ventilation opening 151, and the metal cover 430 also has a ventilation opening 431. With this, when the blower fan 190 is operated, outside air flows through the ventilation openings 151, 431 and the louvers 424 of the terminal board cover 40 toward the power terminal board 31, thereby cooling the power terminal board 31.

[Cord clamp]
As described above, in addition to the main power cord MC, power cords SC (SC1 to SC5) for the five indoor units are connected to power terminal board 31. Therefore, it is necessary to bundle the five power cords SC of these indoor units with a cord clamp and secure them at a specified location (power terminal board 31 or nearby); however, in order to contribute to the miniaturization of the outdoor unit 1, it is preferable that the cord clamp be as short in length as possible.

Referring to Figures 10 to 13, the outdoor unit 1 uses a cord clamp 50 as a cord clamp for this purpose. Note that this cord clamp 50 is for the indoor unit's power cord SC, and for the main power cord MC, a cord clamp 501 for one cord is used, for example, as shown in Figure 6.

The cord clamp 50 according to this embodiment includes a lower clamp 510 that is attached to the power terminal board 31 or in its vicinity, and an upper clamp 530 that is pressed against the lower clamp 510 so as to clamp the power cord SC between the lower clamp 510 and the upper clamp 530. Both the lower clamp 510 and the upper clamp 530 are elongated and have approximately the same length.

The space between the lower clamp 510 and the upper clamp 530 is divided into multiple cord clamping sections by dividing legs 550, but in this embodiment, the number of legs 550 is reduced to further shorten the length of the cord clamp 50 in the longitudinal direction (hereinafter also referred to as the left and right of the cord clamp 50).

Taking a five-cord clamp as an example, conventionally, four partition legs 550 are required to form five cord clamping sections, but in this embodiment, the number of partition legs 550 is reduced by half, using two partition legs 550, thereby shortening the length of the cord clamp accordingly.

That is, in the cord clamp 50 according to this embodiment, one clamping portion 51a for clamping one power cord SC and two clamping portions 51b for simultaneously bundling two power cords SC side-by-side are provided between the lower clamp 510 and the upper clamp 530. As a result, two separating legs 550 are sufficient, and the left-right length of the cord clamp 50 is shortened by the width of two legs 550.

The lower clamp 510 has screw insertion holes 511, 511 at both ends. Also, the lower clamp 510 has locking claws 513, 513 at both ends. In the area between the screw insertion holes 511, 511 at both ends of the lower clamp 510 (hereinafter also referred to as the middle part of the lower clamp 510) corresponding to the legs 550, 550, openings 512, 512 for inserting the legs are formed.

At both ends of the upper clamp 530, screw insertion holes 531, 531 are drilled, which are aligned coaxially with the screw insertion holes 511, 511. In addition, at both ends of the upper clamp 530, locking claws 532, 532 that lock onto the side panel 12 are provided.

Each of the legs 550, 550 has a fixing portion 551 including a small-diameter head portion 551a that fits into the opening 512 and a contact portion 551b that is larger in diameter than the head portion 551a and contacts the periphery of the opening 512. A screw insertion hole 552 is drilled in the fixing portion 551.

As shown in Figures 12 and 13, the side panel 12 to which the cord clamp 50 is attached has female screw holes 121 formed at locations corresponding to the screw insertion holes 511, 511 and the screw insertion holes 552, 552.

In addition, the side panel 12 is formed with a locking hole 123 that is a mating part of the locking claw 513 of the lower clamp 510. The side panel 12 is also formed with a locking hole that is a mating part of the locking claw 532 of the upper clamp 530, but this is not shown in the figure.

When attaching the cord clamp 50, first, the locking claw 513 of the lower clamp 510 is engaged with the locking hole 123 of the side panel 12 to temporarily fix the lower clamp 510 to the side panel 12, and then the power cord SC is wired to the designated clamping portion.

Next, the upper clamp 530 is placed against the lower clamp 510, and the screw insertion holes 511 and 531 are aligned, and the head 551a of the leg 550 is aligned with the opening 512. The upper clamp 530 is temporarily fixed to the side panel 12 with the locking claw 532, and then the four male screws 502 are inserted through the screw insertion holes 511, 531 at both ends and the screw insertion holes 552 of the fixing part 551, and each male screw 502 is screwed into the female screw hole 121. This fixes the lower clamp 510 together with the upper clamp 530 to the side panel 12.

Next, a preferred wiring method for the power cord SC will be described with reference to Figures 5 and 6. As described above, the cord clamp 50 according to this embodiment has one clamping portion 51a for one cord and two clamping portions 51b for two cords. In Figures 5 and 6, the clamping portion for two cords on the left side is designated 51bL, and the clamping portion for two cords on the right side is designated 51bR.

The power cord SC3 connected to the nearest terminal block 32d is inserted into the single-wire clamping portion 51a. The power cord connected to the upper terminal block and the power cord connected to the lower terminal block are inserted as a pair into the double-wire clamping portion 51b.

In this embodiment, the left two-piece clamping portion 51bL is used to insert the power cord SC2 connected to the nearest terminal block 32c on the lower level, and the power cord SC5 connected to the terminal block 82f located on the left side of the terminal blocks 32e and 32f on the upper level.

The upper terminal block 32f is located to the left of the lower terminal block 32b and to the right of terminal block 32c. Therefore, after the power cord SC5 is inserted into the two-cord clamping portion 51bL, it can be wired without crossing with the power cords SC2 and SC1. Also, by locating the terminal block 32f on the upper side to the right of the terminal block 32c, the power cord SC5 can be wired without being bent excessively.

The right two-wire clamping section 51bR is used to insert the power cord SC1, which is connected to the nearest terminal block 32b on the lower level, and the power cord SC4, which is connected to the terminal block 32e located on the right side of the upper level. The upper terminal block 32e is located to the left of the lower terminal block 32a and to the right of the terminal block 32b. Therefore, after the power cord SC4 is inserted into the two-wire clamping section 51bR, it can be wired without crossing the power cord SC1 or the power cord MC. Also, by locating the terminal block 32e on the upper level to the right of the terminal block 32b, the power cord SC4 can be wired without being bent excessively.

By wiring in this manner, five power cords SC can be connected to the terminal block without crossing. Also, the power cords inserted into the two-cord clamping portion 51b can be neatly wired without excessive bending. Note that electrical cords other than power cords, such as communication lines, may also be used. Also, as long as the power cords can be firmly clamped, three or more cords may be clamped.

[Buffer block]
2, this outdoor unit 1 is required to have a large air conditioning capacity because a maximum of five indoor units are connected to it. For this reason, a multi-row configuration, in this embodiment a three-row configuration of an outer row, a middle row, and an inner row, is used for the heat exchanger 180. The heat exchangers in each row are fin-tube type heat exchangers configured by inserting refrigerant piping through plate-shaped fins.

The outer row heat exchanger is designated 181, the middle row heat exchanger 182, and the inner row heat exchanger 183. Each row is formed in an L-shape along the rear side of the housing 10, and the width W along the side is approximately the same for the outer row heat exchanger 181 and the middle row heat exchanger 182, but as shown in Figures 2 and 15, the width W of the inner row heat exchanger 183 is shorter than the outer row heat exchanger 181 and the middle row heat exchanger 182.

Therefore, the end 183a of the inner row is farther away from the front surface of the housing 10 than the ends 181a, 182a of the outer and middle rows. In other words, when viewed from the front surface of the housing 10, the end 183a of the inner row is located further back than the ends 181a, 182a of the outer and middle rows. U-shaped tubes 181b, 182b, 183b are provided at the ends 181a, 182a, 183a of each row, respectively.

When heat exchangers 180 are configured in multiple rows, they need to be integrated to increase their strength. For this reason, the ends of each row are usually fixed with binders or fasteners such as cable ties, but if there are steps at the ends of each row as described above, this fixing work becomes difficult.

Referring to Figures 14 to 16, a buffer block 60 is provided that can integrate the heat exchangers 181, 182, and 183 of each row by simply fitting it into the ends 181a, 182a, and 183a of the heat exchangers 181, 182, and 183 of each row.

In this embodiment, the buffer block 60 is made of polystyrene foam and is disposed between the rear surface of the front panel 11 and the end of the heat exchanger 180. The buffer block 60 has an abutment surface 610 against the rear surface of the front panel 11 on one side, and a first opposing surface (first engagement surface) 621 opposing the respective ends 181a, 182a of the heat exchanger 181 in the outer row and the heat exchanger 182 in the middle row on the other side, and a second opposing surface (second engagement surface) 622 opposing the end 183a of the heat exchanger 183 in the inner row. The buffer block 60 has a first engagement groove that engages with a heat exchanger having a long width W among the multiple rows of heat exchangers, and a second engagement groove that engages with a heat exchanger having a short width W.

As shown in FIG. 16, the first opposing surface 621 is formed with a first fitting groove, which is a fitting groove 631 into which the U-shaped tube 181b provided at the end 181a of the heat exchanger 181 in the outer row fits, and a fitting groove 632 into which the U-shaped tube 182b provided at the end 182a of the heat exchanger 182 in the middle row fits. The second opposing surface 622 is formed with a second fitting groove, which is a fitting groove 633 into which the U-shaped tube 183b provided at the end 183a of the heat exchanger 183 in the inner row fits.

When bending each row of heat exchangers 180 into an L-shape, as shown in FIG. 2, the heat exchangers 183 in the inner row are bent more sharply than the heat exchangers 181 in the outer row (in other words, the curvature of the heat exchangers in the inner row is greater than that of the heat exchangers 181 in the outer row). Therefore, the stress (compressive stress and tensile stress) generated in the bent portion of the heat exchanger 183 in the inner row during bending is also large, and the bent portion opens in an attempt to return to its original shape after bending, which is called springback, is likely to occur. Therefore, the heat exchanger 183 in the inner row is bent until the angle of the bent portion becomes smaller than 90 degrees, taking springback into consideration. As a result, the position of the U-shaped tube 183b of the heat exchanger 183 in the inner row is likely to vary after bending depending on the degree of springback of the bent portion. To address this, the groove width Wa of the fitting groove 633 is made larger than the groove width Wb of the other fitting grooves 631 and 632.

The distance L2 from the second opposing surface 622 to the abutment surface 610 is longer than the distance L1 from the first opposing surface 621 to the abutment surface 610. This allows the heat exchangers 181, 182, and 183 in each row to be integrated by the buffer block 60, even if the end 183a of the heat exchanger 183 in the inner row is located further back than the ends 181a and 182a of the heat exchanger 181 in the outer row and the heat exchanger 182 in the middle row.

In addition, because the distance L2 is long, the heat exchanger 183 (particularly the U-shaped tube) can be protected even if the outdoor unit 1 accidentally falls with the front panel 11 side down during transportation, etc. If the outdoor unit 1 falls with the front panel 11 side down, each heat exchanger 181 to 183 will fall with the inner row heat exchanger 183 on the bottom and the back side of the outer row heat exchanger 181 and the middle row heat exchanger 182 overlapping on top of it. At this time, the weight of the outer row and middle row heat exchangers 181 and 182 is added to the inner row heat exchanger 183, and a large impact is applied to the second opposing surface 622 side of the buffer member 60. Here, by forming the distance L2 from the second opposing surface 622 to the abutting surface 610 to be long, the volume of the buffer member 60 increases, the impact can be absorbed, and the heat exchanger 183 (particularly the U-shaped tube) is protected.

This buffer block 60 allows the outer, middle and inner rows of heat exchangers 181, 182, 183 to be integrated simply by fitting it to the end of the heat exchanger 180. In addition, the U-shaped tubes at the tube ends can be protected even if the heat exchanger 180 falls forward due to an impact during transportation during the manufacturing process.

[Control board]
The outdoor unit 1 according to this embodiment is a multi-type outdoor unit that is based on a single-type outdoor unit and can connect up to five indoor units. In the case of a single-type outdoor unit, the inverter control unit and the main control unit that controls the expansion valve, communication system, etc. can be housed on a single control board.

However, as the number of connected indoor units increases, the number of inputs and outputs, particularly of the main control unit, increases, and the size of the board also increases. Remaking a new control board requires design changes, including its placement location, which increases costs. For this reason, in this embodiment, the control board is shared with the single-type outdoor unit, minimizing the increase in costs.

Referring to Figures 2 and 3, in this embodiment, the control board 70 is disposed at the top of the machine room 17. The control board 70 has two boards, an inverter board 710 and a main board 730. The inverter board 710 is the same size as the inverter board used in a single-type outdoor unit, but the components mounted thereon are not necessarily the same as those in the single-type outdoor unit. The main board 730 is a board newly prepared for use in a multi-type outdoor unit.

Referring to Figures 17 and 18, the inverter board 710 is mounted with heat-generating components that require cooling, such as an IPM (intelligent power module) and a large electrolytic capacitor for rectification. For this reason, the inverter board 710 is provided with a heat sink 711. In Figure 3, the heat sink 711 is disposed on the left end (rear end) side of the inverter board 710, and the power terminal board 31 is disposed on the right end (front end) side of the inverter board 710.

The inverter board 710 is supported by the upper end of the partition plate 16, just like the single-type outdoor unit, and is screwed to the partition plate 16 and the motor bracket 191 of the blower fan 190. At this time, the heat sink 711 is placed inside the blower chamber 18, climbing over the partition plate 16, in order to enhance its heat dissipation effect. The power supply terminal board 31 is also placed inside the board storage section 30.

The main board 730 is equipped with control circuits such as an expansion valve and a four-way valve, a temperature measurement circuit using a thermistor in the refrigerant piping, and a communication circuit with the indoor unit. The main board 730 does not require any cooling because it is not equipped with any heat-generating components.

The main board 730 is attached almost perpendicularly to the inverter board 710 via a support bracket 740. The attachment position of the main board 730 to the inverter board 710 is on the front panel 11 side for ease of maintenance. This allows easy access to the main board 730 by removing the front panel 11.

As shown in FIG. 17, the support bracket 740 is screwed to the inverter board 710 at two points on the top left and right, and is treated as one unit with the inverter board 710.

The support bracket 740 has a locking claw 732 and a screw-fastening portion 733 on the left side for the partition plate 16. As shown in FIG. 3, the locking claw 732 is locked into a locking groove (not shown) formed in the partition plate 16, and the screw-fastening portion 733 is screwed to the partition plate 16, so that the entire main board 730 is firmly fixed so that it does not bend when the main board 730 is operated.

The present invention has been described above using an embodiment, but the technical scope of the present invention is not limited to the description of the above embodiment. Modifications or improvements made to the above embodiment by those skilled in the art are also included in the technical scope of the present invention.

LIST OF SYMBOLS 1 Outdoor unit 10 Housing 11 Front panel 12 Right side panel 13 Top panel 14 Base board 15 Parts mounting board 16 Partition plate 17 Machine room 18 Fan room 180 (181, 182, 183) Heat exchanger 20 Pipe connection unit 30 Board storage section 31 Power terminal board 32 (32a to 32f) Terminal block 33 Display board 40 Terminal board cover 41 Notch 430 Metal cover for preventing fire spread 50 Cord clamp 51a Clamping section for one cord 51b (51bL, 51bR) Clamping section for two cords 510 Lower clamp 530 Upper clamp 550 Legs 60 Buffer block 631, 632, 633 Fitting groove 70 Control board 710 Inverter board 730 Main board 740 Support bracket

Claims (2)

An outdoor unit for an air conditioner having a rectangular parallelepiped housing, in which heat exchangers formed from a rear surface to a side surface within the housing are arranged in multiple rows including an outer row and an inner row,
an outdoor unit for an air conditioner comprising: a back surface of a front panel disposed on the front surface of the housing and each end of the heat exchanger, the buffer block integrally comprising a first engagement surface having a first fitting groove formed therein into which a U-shaped tube provided at an end of at least the outer row fits, and a second engagement surface having a second fitting groove formed therein into which a U-shaped tube provided at an end of the inner row fits, a groove width of the second fitting groove being larger than the groove width of the first fitting groove by an amount that allows for springback of the inner row, and the ends of the outer row and the ends of the inner row are fixed together by the buffer block . The outdoor unit of an air conditioner according to claim 1, characterized in that the buffer block has an abutment surface against the rear surface of the front panel, and the distance from the second engagement surface to the abutment surface is longer than the distance from the first engagement surface to the abutment surface.

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