JP6601580B1 - Electrical component module - Google Patents

Abstract

A printed circuit board can be easily maintained without removing a cooler, and the mechanical strength of a printed circuit board support structure is enhanced with a simple structure. An electrical component module is provided between a control unit that controls an air conditioner, a fixed plate that is arranged so that the front of the service panel faces the front, and the control unit is mounted, and a back surface of the fixed plate. A cooler that is disposed across the refrigerant pipe and is attached to a part of the refrigerant pipe, a first frame that is attached to one end of the fixed plate, and a second frame that is attached to the other end of the fixed plate. The control unit includes a printed circuit board on which the power device is mounted. The power device is thermally coupled to the cooler, and the cooler is attached to straddle the first frame and the second frame. [Selection] Figure 12

Description

  The present invention relates to an electrical component module that is installed in a machine room provided with a service panel on the front side of an outdoor unit of an air conditioner and provided on the back side of the service panel.

  As shown in FIG. 13, the general air conditioner includes an outdoor unit 10 that is installed outdoors and an indoor unit 20 that is installed indoors. The outdoor unit 10 and the indoor unit 20 are connected by a refrigerant pipe 30 to constitute a vapor compression refrigeration cycle.

  The outdoor unit 10 receives lubricating oil from an outdoor heat exchanger 11 that exchanges heat between the outdoor air and the refrigerant, a blower fan 11F, a compressor 12 that compresses the refrigerant, a lubricating oil discharged from the compressor 12 and a mixed fluid of the refrigerant. There are provided an oil separator 13 for separation, an expansion valve 14 for expanding and reducing the inflowing refrigerant to a predetermined pressure, an accumulator 15 for gas-liquid separation of the inflowing refrigerant, a four-way valve 16 for switching between heating operation and cooling operation, and the like. Yes. The indoor unit 20 is provided with an indoor heat exchanger 21 for exchanging heat between the indoor air and the refrigerant, a blower fan 21F, and the like. The refrigerant pipe 30 connects the outdoor heat exchanger 11, the compressor 12, the oil separator 13, the expansion valve 14, the accumulator 15, the four-way valve 16, and the indoor heat exchanger 21. The refrigerant pipe 30 includes a liquid side refrigerant pipe 30L and a gas side refrigerant pipe 30G.

  As shown in FIG. 14, in the outdoor unit 10, the inside of the housing 17 is partitioned into a heat exchanger chamber 10A and a machine chamber 10B in the left-right direction by a partition plate 171, and the outdoor heat described above is included in the heat exchanger chamber 10A. An exchanger 11 and a blower fan 11F are arranged. The machine room 10B accommodates the compressor 12, the oil separator 13, the expansion valve 14, the accumulator 15, the four-way valve 16 and the like, which are described above, and these are service panels (not shown) on the front surface of the housing 17 as shown in FIG. By removing, it is visible from the outside.

  In the machine room 10B, an electrical component module 40 is further arranged at a substantially intermediate position in the vertical direction. The electrical component module 40 includes a control circuit for controlling the overall operation of the air conditioner, a setting circuit for performing various settings of the air conditioner, a display circuit for displaying the state of the air conditioner, and an alternating current supplied from the outside. A converter circuit that converts electric power into DC power and outputs it, an inverter circuit that converts DC power output from the converter circuit into AC power, and other circuits are mounted on the printed circuit board 41. A plurality of electronic components for realizing a circuit are mounted. The printed circuit board 41 is composed of a single sheet so that a piping space can be secured on the back side of the machine room 10B.

  FIG. 15 shows a front view of the electrical component module 40. The printed circuit board 41 is attached in an upright posture in the machine room 10B. The printed circuit board 41 is divided into a low-power area 41A and a high-power area 41B in the vertical direction.

  In the low current area 41A, electronic parts such as a microcomputer constituting a part of the control circuit described above, electronic parts for operation such as a switch 41A1 constituting a setting circuit and a low power connector 41A2 for plugging / unplugging, a display circuit A weak electric system electronic component such as LED 41A3 is mounted. Further, the high-power area 41B includes a plurality of high-power electronic components for performing power conversion that constitute the rest of the control circuit, for example, a power device 41B1 such as an IC of a converter circuit and an IC of an inverter circuit, and a smoothing device. Components such as a large-capacity electrolytic capacitor 41B2 and a high-power connector 41B3 are mounted.

  A cooler 50 for cooling the heat generated in the power device 41B1 is further arranged in the high-power area 41B. The cooler 50 includes a heat sink (not shown) shaped to be attached to the liquid side refrigerant pipe 30 </ b> L of the refrigerant pipe 30. The heat sink is arranged with the front side of the printed circuit board 41 to be thermally coupled so that the heat generated by the power device 41B1 is transmitted toward the service panel (not shown). The refrigerant condensed in the outdoor heat exchanger 11 during the cooling operation flows into the liquid side refrigerant pipe 30L, and the refrigerant condensed in the indoor heat exchanger 21 and decompressed in the expansion valve 14 during the heating operation flows. The heat sink of the cooler 50 is cooled, and the temperature of the power device 41B1 is kept below a predetermined value. The air conditioner described above is described in Patent Document 1.

Japanese Patent No. 5472364

  By the way, in the outdoor unit 10 described above, since the cooler 50 is disposed on the front side of the printed circuit board 41 facing the service panel for accessing the inside, maintenance such as replacement of the printed circuit board 41 is performed. At this time, it is necessary to remove the refrigerant pipe 30 and the heat sink from the front surface of the printed circuit board 41. For this reason, the maintenance work of the printed circuit board 41 has a disadvantage that requires skill. Further, in the electrical component module 40 described above, since the cooler 50 is supported on the printed circuit board 41, there is a problem that the mechanical strength of the support structure of the printed circuit board 41 against vibration or the like is low.

  The disclosed technology has been made in view of the above, and can easily perform maintenance of the printed circuit board without removing the cooler, and can increase the mechanical strength of the support structure of the printed circuit board with a simple structure. An object is to provide an electrical component module.

One aspect of the electrical component module disclosed in the present application is an electrical component module that is attached to a machine room provided on the back side of the service panel in which the service panel is arranged in front of the outdoor unit of the air conditioner having a refrigerant pipe. A control unit that controls the air conditioner, and is arranged so that the front of the service panel faces, and is arranged with a refrigerant pipe interposed between the fixed plate on which the control unit is mounted and the back surface of the fixed plate, A cooler attached to a part of the refrigerant pipe, a first frame attached to one end of the fixed plate, and a second frame attached to the other end of the fixed plate, and the control unit is equipped with a power device The power device is thermally coupled to a cooler, and the cooler is attached to straddle the first frame and the second frame. The outdoor unit is attached with a partition plate that partitions the heat exchanger chamber and the machine room, one end of the first frame and one end of the second frame are attached to the partition plate, and the other end of the first frame and the second frame. The other end is attached to the cooler.

  According to one aspect of the electrical component module disclosed in the present application, the maintenance of the printed circuit board can be easily performed without removing the cooler, and the mechanical strength of the support structure for the printed circuit board can be increased with a simple structure.

FIG. 1 is a perspective view showing an outdoor unit of the embodiment. FIG. 2 is a perspective view showing the outdoor unit with the service panel removed. FIG. 3 is a perspective view showing the outdoor unit with the electrical component module removed from the machine room. FIG. 4 is an exploded perspective view of the electrical component module and the cooler. FIG. 5 is an explanatory view of attachment for attaching the upper frame and the lower frame to the partition plate. FIG. 6 is a longitudinal sectional view of the electrical component module. 7 is a cross-sectional view taken along line AA in FIG. FIG. 8 is a plan view of the outdoor unit with the top panel removed. FIG. 9 is a right side view of the outdoor unit with the right side panel removed. FIG. 10 is a front view of the main board. FIG. 11 is a front view of the power board. FIG. 12 is a perspective view showing a modification of the electrical component module of the embodiment. FIG. 13 is a circuit diagram of a refrigerant circuit of the air conditioner. FIG. 14 is a front view of the conventional outdoor unit with the service panel removed. FIG. 15 is a front view of a conventional electrical component module.

  Hereinafter, embodiments of the electrical component module disclosed in the present application will be described in detail with reference to the drawings. The electrical component module disclosed in the present application is not limited by the following embodiments. 1 to 3, 8, and 9 show an outdoor unit 100 according to an embodiment of the present invention. A casing 110 of the outdoor unit 100 includes a front panel 111, a service panel 112 on the right side of the front panel 111, a right side panel 113, a left side panel 114, a top panel 115, a back panel 116, and a bottom panel 117. Yes. A stand 118 is attached to the bottom panel 117. The internal space of the housing 110 is partitioned in the left-right direction by the partition plate 119 so that the heat exchanger chamber 110A is provided on the back side of the front panel 111 and the machine room 110B is provided on the back side of the service panel 112. Has been. This partition plate 119 constitutes a part of the wall surface of the machine room 110B. The outdoor heat exchanger 11 and the blower fan 11F described above are arranged in the heat exchanger chamber 110A. The machine chamber 110B houses the refrigerant pipe 30, the compressor 12, the expansion valve 14, the accumulator 15, the sub accumulator 15A, the four-way valve 16, and the like described above. The internal space of the machine room 110B is visible from the front side of the outdoor unit 100 by removing the service panel 112.

  As shown in FIGS. 4 to 9, the electrical component module 200 is attached to a fixed plate 210 disposed in the machine room 110 </ b> B so that the front surface faces the back surface of the service panel 112, and an upper portion as one end portion of the fixed plate 210. An upper frame 220 as a long first frame, a lower frame 230 as a long second frame to which a lower portion as the other end of the fixing plate 210 is attached, and the upper frame 220 as a partition plate 119 A mounting bracket 240 to be mounted, a mounting bracket 250 for mounting the lower frame 230 to the partition plate 119, a main board 260 on which an electronic component constituting a part of a control circuit as a control unit and other electronic components are mounted, and a control circuit Power board 2 on which a plurality of power devices 274, which will be described later, are mounted. Including 0 and, the.

  Thus, the printed board of the electrical component module 200 is divided into the main board 260 and the power board 270. The main board 260 as the printed board has a back surface 260b described later, and a front surface 211a described later of the fixed plate 210. It is mounted on the fixed plate 210 so as to face. A power board 270 serving as a printed board is mounted on the fixed plate 210 such that a back surface 270b described later faces a back surface 211b described later of the fixed plate 210. That is, the fixed plate 210 is arranged so that the front surface 211 a of the fixed plate 210 faces the service panel 112. The fixed plate 210 is arranged so that the direction connecting the upper and lower portions of the fixed plate 210 is along the vertical direction of the machine room 110B.

  In addition, the electrical component module 200 includes a cooler 300 that is disposed between the back surface 211b of the fixing plate 201 with the refrigerant pipe 30L interposed therebetween and attached to a part of the refrigerant pipe 30L. The cooler 300 is attached to the upper frame 220 and the lower frame 230 so as to straddle the upper frame 220 and the lower frame 230 in a state where the U-shaped bent portion 31 of the refrigerant pipe 30L is attached as will be described later.

  The fixing plate 210 includes a main body 211 on which a main board 260 is mounted on the front surface 211a and a power board 270 on the back surface 211b, and a reinforcing plate bent at 90 degrees from the upper end of the main body section 211 toward the back surface 211b. The upper horizontal piece 212 and the upper vertical piece 213 for attachment bent 90 degree | times upward from the rear end of the upper horizontal piece 212 are provided. The fixing plate 210 includes a reinforcing lower horizontal piece 214 bent at 90 degrees from the lower end of the main body 211 toward the front surface 211a, and a lower vertical piece bent at 90 degrees downward from the front end of the lower horizontal piece 214. A piece 215. At both ends of the lower vertical piece 215, mounting portions 215a that protrude downward are formed.

  The upper frame 220 includes a vertical piece 221 screwed to the upper vertical piece 213 of the fixing plate 210, an upper horizontal piece 222 for reinforcement bent 90 degrees rearward from the upper end of the vertical piece 221, and a vertical piece 211. And an attachment piece 223 bent forward at 45 degrees from the left end. The upper end of the cooler 300 is attached to the end 224 of the upper frame 220.

  The lower frame 230 includes a lower vertical piece 231 screwed to the lower vertical piece 215 of the fixing plate 210, an upper horizontal piece 232 bent 90 degrees rearward from the upper end of the lower vertical piece 231, and an upper horizontal piece 232 The upper vertical piece 233 for reinforcement bent 90 degree | times upward from the back end, and the attachment piece 234 bent by 45 degree | times toward the front from the left end of the lower vertical piece 231 are provided. And the terminal board 400 is attached to the front side of the lower vertical piece 231. The lower end of the cooler 300 is attached to the end 235 of the lower frame 230.

  The cooler 300 includes an aluminum heat sink 310 that is thermally coupled to a plurality of power devices 274, which will be described later, mounted on the front surface 270a of the power board 270, and two cross sections formed on the heat sink 310 that have a semicircular shape. The U-shaped bent portion 31 of the liquid-side refrigerant pipe 30L fitted in the groove 311 and a sheet metal cover 320 for fixing the U-shaped bent portion 31 to the heat sink 310 are configured. In addition to the groove 311, the heat sink 310 includes a thick plate portion 312 to which the power device 274 is pressed and thermally coupled, and cover attachment portions 313 and 314 formed on both sides of the thick plate portion 312. The cover 320 includes a center pressing portion 321 that presses the U-shaped bent portion 31 of the liquid side refrigerant pipe 30L, a hook portion 322 bent from one end of the pressing portion 321, and a hook portion 322 from the other end of the pressing portion 321. And an attachment portion 323 bent so as to face each other.

  On the front surface 260a of the main board 260, electronic components and other electronic components that constitute a part of the control circuit are mounted as described above. That is, as shown in FIG. 10, an AC input current detection / temperature detection circuit 261, an actuator drive circuit 262 for driving the expansion valve 14 and the four-way valve 16, and an LED lamp 263a as a display are provided on the front surface 260a of the main board 260. A display setting circuit 263 including a dip switch 263b and a button switch 263c as an operation unit, a main control IC 264 such as a microcomputer, an EMC (ElectroMagnetic for countermeasures against external noise and spontaneous noise including a common mode choke coil 254a and a capacitor 265b, etc. Compatibillity) filter circuit 265, switching power supply circuit 266 having switching transformer 266a and switching IC 266b, inrush current control circuit 267, a plurality of connectors 268 arranged in the periphery, and the like are mounted. Reference numeral 260 b denotes the back surface of the main board 260. The main board 260 is formed in a square shape, and has an upper end 260c, a lower end 260d, a left end 260e, and a right end 260f. The main board 260 is mounted on the front surface 211a so that the back surface 260b faces the front surface 211a of the main body 211 of the fixing plate 210.

  On the front surface 270a of the power board 270, as described above, electronic components including a plurality of power devices 274, which will be described later, constituting the remaining part of the control circuit are mounted. That is, as shown in FIG. 11, a diode bridge circuit 271a for rectification, two IGBT (Insulated Gate Bipolar Transistor) elements 271b in which a MOSFET is incorporated in the gate portion of the bipolar transistor to reduce the operating resistance, and 2 for high speed operation. An FRD (Fast Recovery Diode) element 271c, two PFC (Power Factor Correction) coils 271d for power factor improvement, two aluminum electrolytic capacitors 271e for smoothing high power, and the like are mounted. The diode bridge circuit 271a, the IGBT element 271b, the FRD element 271c, the PFC coil 271d, the electrolytic capacitor 271e, and the like constitute a converter circuit 271 that converts AC power supplied from the outside and outputs it. Further, an IPM (Intelligent Power Module) element 272 and an inverter control IC 273 that constitute an inverter circuit that incorporates a drive circuit and a self-protection function and converts DC power supplied from the converter circuit 271 to AC power and outputs the AC power are also mounted. Yes. 270b is the back surface of the power board 270. The power board 270 is formed in a square shape, and has an upper end 270c, a lower end 270d, a left end 270e, and a right end 270f. The diode bridge circuit 271a, the IGBT element 271b, the FRD element 271c, the IPM element 272, etc. are each a power device 274 that generates a large amount of heat, and are mounted in a vertical arrangement in the vicinity of the left end 270e so as to be easily cooled by the cooler 300. ing. The power substrate 270 is mounted on the back surface 211 b so that the back surface 270 b faces the back surface 211 b of the main body 211 of the fixing plate 210. The cooler 300 faces and abuts the portions of the plurality of power devices 274.

  The vertical size of the power board 270 is set in accordance with the vertical arrangement size of the plurality of power devices 274, and the PFC coil 271d, the electrolytic capacitor 271e, the inverter control IC 273, etc. are included in the size. Be placed. In this way, the vertical size of the power board 270 is set to a slightly larger size corresponding to the vertical size of the vertical arrangement of the plurality of power devices 274. The main board 260 is set to the same size in the vertical direction corresponding to the vertical size of the power board 270, and the AC input current detection / temperature detection circuit 261, the actuator drive circuit 262, the display so as to be within the size. A setting circuit 263, a main control IC 264, an EMC filter circuit 265, a switching power supply circuit 266, an inrush current control circuit 267, a connector 268, and the like are mounted. The IGBT element 271b may be replaced with a MOSFET.

  The electronic components mounted on the main board 260 and the power board 270 described above are merely examples, and can be changed without departing from the spirit of the present invention. The electronic component mounted on the main board 260 is a low-power electronic component that operates at a low voltage, and the electronic component mounted on the power board 270 is a high-power electronic component that operates at a high voltage. High-power electronic components generate more heat and generate more noise than weak-power electronic components.

  By the way, in order to arrange the electrical component module 200 in the machine room 110B of the outdoor unit 100, first, the mounting bracket 240 having the slope 241 and the mounting bracket 250 having the slope 251 are attached to the partition plate 119 in advance. Then, as shown in FIG. 5, the mounting piece 223 of the upper frame 220 is screwed to the slope 241 of the mounting bracket 240, and the mounting piece 234 of the lower frame 230 is screwed to the slope 251 of the mounting bracket 250. Accordingly, the upper frame 220 and the lower frame 230 are attached to the partition plate 119 in a posture along the lateral direction in a cantilevered state.

  Next, as shown in FIG. 6, the heat sink 310 of the cooler 300 is placed between the end 224 of the vertical piece 221 of the upper frame 220 and the end 235 of the upper vertical piece 233 of the lower frame 230. Install with screws B1 and B2. Further, as shown in FIG. 7, after the U-shaped bent portion 31 of the refrigerant pipe 30L is pressed against the groove 311 of the heat sink 310, the hook portion 322 of the cover 320 is engaged with one cover mounting portion 313 of the heat sink 310. The pressing portion 323 is pressed against the other cover mounting portion 314 of the heat sink 310, and the pressing portion 323 is fixed to the cover mounting portion 314 with screws B3 and B4. This operation is performed with the rear panel 116 of the outdoor unit 100 removed. As described above, the cooler 300 is arranged so as to straddle between the end portion 224 of the upper frame 220 and the end portion 235 of the lower frame 230 and so that the thick plate portion 312 of the heat sink 310 faces the service panel 112. It is attached.

  The main board 260 is mounted on the front surface 211a of the main body 211 of the fixed plate 210, and the power board 260 is mounted on the back surface 211b. Then, the fixing plate 210 on which the main board 260 and the power board 270 are mounted has its upper vertical piece 213 aligned with the vertical piece 221 of the upper frame 220 and its lower vertical piece 215 aligned with the lower vertical piece 231 of the lower frame 230. In this way, the screws B5 and B6 are attached. At this time, the attachment piece 223 of the upper frame 220 is attached to the partition plate 119 by the attachment fitting 240 and the attachment piece 234 of the lower frame 230 is attached to the partition plate 119, respectively, and the other end 224 of the upper frame 220 and the lower frame 230 are attached. The other end 235 is fixed to the U-shaped bent portion 31 of the liquid side refrigerant pipe 30L by the cooler 300, so that the fixing plate 210 is firmly fixed. Further, the plurality of power devices 274 on the power board 270 are pressed against the thick plate portion 312 of the heat sink 310 of the cooler 300 and are thermally coupled there. Therefore, the heat generated by the power device 274 is cooled by the cooler 300 by starting the operation of the air conditioner. If a heat radiation grease having high thermal conductivity is applied to the thick plate portion 312 of the heat sink 310, thermal coupling is further improved. After the electrical component module 200 is attached to the machine room 110B as described above, a plug to which necessary wiring is connected is connected to the connector 263 of the main board 260 of the electrical component module 200, and the terminal board 400 is required. Another wiring is connected.

  The electrical component module 200 described above includes the main board 260 and the power board 270 that are two printed boards, but may include only one printed board. FIG. 12 is a perspective view showing a modification of the electrical component module 200 of the embodiment.

  As shown in FIG. 12, the front surface 211a of the fixed board 210 is fixed so that the front surface 360a of the printed circuit board 360 faces the service panel 112 (see FIG. 8) and the back surface 360b of the printed circuit board 360 is fixed. One printed circuit board 360 is mounted on the fixed plate 210 so as to face the front surface 211 a of the plate 210. The printed circuit board 360 includes a main circuit board 260 on which electronic components that constitute a part of the control circuit are mounted on the front surface 260a, and a plurality of power devices 274 that constitute the remaining part of the control circuit. And a power board 270 on which electronic components including are mounted on the front surface 270a. The printed circuit board 360 is formed in a quadrangular shape and has an upper end 260c, a lower end 260d, a left end 260e, and a right end 260f.

  On the printed circuit board 360, a plurality of power devices 274 are arranged on at least one of the front surface 360a and the back surface 360b. When the power device 274 is arranged on the front surface 360 a of the printed circuit board 360, the power device 274 protrudes toward the back surface 360 b of the printed circuit board 360 through a through hole (not shown) of the printed circuit board 360.

  The fixing plate 210 is provided with openings 216 for thermally coupling the plurality of power devices 274 mounted on the printed circuit board 360 to the cooler 300 at positions facing the power devices 274. The power device 274 of the printed circuit board 360 attached to the fixed plate 210 is in contact with the thick plate portion 312 of the heat sink 310 of the cooler 300 through the opening 216.

  Instead of the opening 216, a notch (not shown) through which the power device 274 of the printed board 360 passes may be formed on the outer periphery of the fixed plate 210. Further, the fixing plate 210 is not limited to the structure having the opening 216 and the notch. For example, the power device 274 of the printed circuit board 360 is disposed on the outer peripheral side of the fixing plate 210 so that the outer peripheral portion of the fixing plate 210 is disposed. It may be thermally coupled to the cooler 300 across the bridge.

  As described above, the electrical component module 200 according to the present embodiment is arranged between the fixed plate 210 on which the control circuit is mounted and the rear surface 211b of the fixed plate 210, with the front panel 211a facing the service panel 112. And a cooler 300 that is disposed across the refrigerant pipe 30L and attached to a part of the refrigerant pipe 30L. Thereby, when performing maintenance of the printed circuit board 360 (or the main circuit board 260 and the power circuit board 270) of the control circuit, the printed circuit board 360 (or the main circuit board 260 and the power circuit board 270) is not removed from the machine room 110B. Can be easily maintained. The electrical component module 200 includes a long upper frame 220 in which the upper part of the fixed plate 210 is attached to the machine room 110B, a long lower frame 230 in which the lower part of the fixed plate 210 is attached to the machine room 110B, The cooler 300 is attached so as to straddle the upper frame 220 and the lower frame 230. Accordingly, the upper frame 220 and the lower frame 230 are connected by the fixing plate 210, and the upper frame and the lower frame 230 are connected by the cooler 300, so that the fixing plate 210, the upper frame 220, and the lower frame 230 are connected. The mechanical strength of the support structure of the supported main board 260, power board 270, and printed board 360 can be increased with a simple structure. That is, in the electrical component module 200, the cooler 300 also serves as a part of the support structure for the main board 260, the power board 270, and the printed board 360, so that the support structure can be simplified.

  By the way, in the outdoor unit 100, when only one printed circuit board 360 is used (FIG. 12), in the up and down direction of one printed circuit board 360, the weak electrical system electronic components are arranged in the weak electrical area, and the strong electrical system electronic components are disposed in the high electrical area. Be placed. As described above, when the low-power electronic components and the high-power electronic components are mounted side by side in the vertical direction of the printed circuit board 360, the vertical size of the printed circuit board 360 is increased. For this reason, it is difficult to apply such a printed circuit board 360 to an outdoor unit having a small space in the vertical space of the machine room. Therefore, it is preferable to divide the printed board 360 into two and mount the two printed boards (the main board 260 and the power board 270) separately on the front surface 211a and the back surface 211b of the fixed plate 210. On the other hand, when the vertical sizes of the main board 260 and the power board 270 are different from each other, the advantage of dividing the printed board 360 into two is lost.

  Therefore, in this embodiment, the main board 260 and the power board 270 are mounted on the fixing plate 210 with their back surfaces aligned with each other via the fixing plate 210 attached to the machine room 110B. For this reason, the vertical size of the main board 260 and the power board 270 is significantly smaller than the vertical size of the printed board when the main board 260 and the power board 270 are arranged one above the other. Therefore, the present invention can be effectively applied to an outdoor unit having a housing with a small margin in the vertical space.

  At this time, the vertical size of the power board 270 is set to a size corresponding to the vertical arrangement size of the plurality of power devices 274, and the main board 260 is set to be the same as or substantially the same as the vertical size. By distributing and mounting electronic components other than the power device 274 on the main board 260 and the power board 270, the vertical size of the main board 260 and the power board 270 can be reduced.

  Further, the lower vertical piece 231 of the lower frame 230 protrudes to the front side from the fixed plate 210 by the upper horizontal piece 232, and the terminal plate 400 is attached to the front surface 231 a of the lower vertical piece 231. For this reason, since the terminal board 400 protrudes ahead and it becomes easy to access to it, since the wide space SP can be ensured in the back surface 231b of the lower vertical piece 231, the lower frame 230 is piping arrange | positioned in the space SP. I will not disturb you.

  The plurality of power devices 274 mounted on the power board 270 are thermally coupled to the cooler 300 on the back surface 211b side of the fixed plate 210, but are only pressed against the cooler 300. Therefore, by loosening the screws B5 and B6, the fixing plate 210, the main board 260, and the power board 270 can be integrally removed from the front of the machine room 110B without being disturbed by the cooler 300. Maintenance of the substrate 260 and the power substrate 270 is facilitated.

  The main board 260 is mounted with a display setting circuit 261 including a LED lamp 261a, a dip switch 261b, a button switch 261c, and a plurality of connectors 263 on the front surface 260a. For this reason, simply removing the service panel 112 from the outdoor unit 100 can check the operation content of the air conditioner according to the display content of the LED lamp 261a, or change the setting content by operating the dip switch 261b or the button switch 261c. Or switching the circuit connection by inserting / removing a plug into / from the connector 263.

30L: Liquid side refrigerant pipe, 31: U-shaped bent part 100: Outdoor unit, 110: Housing, 110A: Heat exchanger room, 110B: Machine room, 111: Front panel, 112: Service panel, 113: Right side Panel: 114: Left side panel, 115: Top panel, 116: Back panel, 117: Bottom panel, 118: Stand, 119: Partition plate 200: Electrical component module 210: Fixed plate, 211: Main body, 211a: Front 211b: back side, 212: upper horizontal piece, 213: upper vertical piece, 214: lower horizontal piece, 215: lower vertical piece, 216: opening 220: upper frame, 221: vertical piece, 222: horizontal piece, 223: mounting Piece 230: Lower frame, 231: Lower vertical piece, 232: Upper horizontal piece, 233: Upper vertical piece, 234: Mounting piece 240: Mounting bracket 250: Mounting bracket 260: Main board, 260a: Positive , 260b: back side 270: Power board, 270a: front, 270b: back side, 274: power device 300: condenser, 310: heat sink, 320: Cover 360: PCB 400: terminal board

Claims (5)

In the electrical component module installed in the machine room provided on the back side of the service panel, the service panel is arranged in front of the outdoor unit of the air conditioner having a refrigerant pipe,
A control unit for controlling the air conditioner;
A fixed plate on which the front side faces the service panel and the control unit is mounted;
A cooler disposed between the back surface of the fixing plate and the refrigerant pipe, and attached to a part of the refrigerant pipe;
A first frame attached to one end of the fixed plate;
A second frame attached to the other end of the fixed plate,
The control unit includes a printed circuit board on which a power device is mounted,
The power device is thermally coupled to the cooler;
The cooler is attached to straddle the first frame and the second frame ,
A partition plate that partitions the heat exchanger chamber and the machine room is attached to the outdoor unit,
An electrical component module, wherein one end of the first frame and one end of the second frame are attached to the partition plate, and the other end of the first frame and the other end of the second frame are attached to the cooler . The electrical component module according to claim 1,
The electrical component module, wherein the fixing plate is provided with an opening or a notch for thermally coupling the power device of the printed board to the cooler. The electrical component module according to claim 1,
The printed circuit board includes a main board on which an electronic component that constitutes a part of the control unit is mounted on the front surface, and an electronic component that includes the plurality of power devices that configure the remaining part of the control unit on the front surface. Including a power board,
The main board and the power board are mounted on the fixing plate such that the back surface of the main board faces the front surface of the fixing plate and the back surface of the power board faces the back surface of the fixing plate. The fixing plate is attached to the machine room so that the front of the device faces the service panel,
A plurality of the power devices are vertically arranged in front of the power board and thermally coupled to the cooler,
The fixing plate is arranged so that a direction connecting the one end and the other end is along the vertical direction,
The power board, the vertical size of the power board is set corresponding to the vertical size of the vertical array of the power devices,
The main board is an electrical component module in which the vertical size of the main board is set corresponding to the vertical size of the power board. The electrical component module according to claim 3 ,
The power device is an electrical component module positioned between the other end of the first frame and the other end of the second frame. The electrical component module according to any one of claims 1 to 4 ,
The cooler is an electrical component module having a heat sink thermally coupled to the power device and a cover for attaching the heat sink to a part of the refrigerant pipe.