JP2019163878A - Outdoor machine of air conditioner - Google Patents

Abstract

To provide an electric component module which can be effectively employed to even an outdoor machine having a box body which is small in margins in upper and lower spaces, is easy in attachment/detachment to a machine room, and can cool even a heat generation component which cannot be directly cooled by a cooler 50.SOLUTION: An electric component module 200 comprises a main baseboard 260, a power baseboard 270 on which a power device 277 is mounted, and a fixing plate 210 on which the main baseboard 260 and the power baseboard 270 are mounted. The cooler 300 is constituted of a heatsink 310 which is thermally connected to the power device 277, and a cover 320 for attaching the heatsink 310 to refrigerant piping 30L. Heat radiation fins 324 which are cooled by an airflow flowing in a ventilation port 199a of a partitioning plate 199 are arranged at the cover 320.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an outdoor unit of an air conditioner that cools a power device mounted on an electrical component module with a cooler attached to a refrigerant pipe.

  As shown in FIG. 16, a general air conditioner includes an outdoor unit 10 installed outside and an indoor unit 20 installed indoors. The outdoor unit 10 and the indoor unit 20 are connected by a refrigerant pipe 30 to form 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. 17, the outdoor unit 10 has an interior of the housing 17 partitioned into a blower chamber 10 </ b> A and a machine chamber 10 </ b> B by a partition plate 171 in the left-right direction. And the outdoor heat exchanger 11 and the ventilation fan 11F which were mentioned above are arrange | positioned in 10 A of air blower rooms. 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 described above. 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. 18 shows the front 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-power area 41A, electronic components such as a microcomputer constituting a part of the control circuit, a switch 41A1 constituting a setting circuit, and a low-power connector 41A2 for plugging / unplugging, an operation electronic component, a display circuit, etc. A weak electric system electronic component such as LED 41A3 is mounted. The high-power area 41B includes a plurality of high-power electronic components for performing power conversion constituting the remainder of the control circuit, such as a power device 41B1 such as an IC of a converter circuit and an IC of an inverter circuit, and a large capacity for smoothing. Components such as an 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 on the front side of the printed circuit board 41 toward the service panel (not shown) so as to be thermally coupled to the power device 41B1. The refrigerant condensed in the outdoor heat exchanger 11 flows in the liquid refrigerant pipe 30L during the cooling operation, and the refrigerant condensed in the indoor heat exchanger 21 and decompressed in the expansion valve 14 flows during the heating operation. 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, the above-described outdoor unit 10 cools the heat generated in the power device 41B1 by the refrigerant in the refrigerant pipe 30L. For this reason, the refrigerant cooling effect largely depends on the temperature of the refrigerant pipe 30L. Therefore, when the compressor 12 is operating, that is, when the refrigerant circulates through the refrigerant pipe 30, the cooling effect is large, but when the compressor 12 is stopped and the refrigerant circulation is stopped by a protective operation or the like. Cooling effect decreases. Since the compressor is not restarted until the temperature of the power device 41B1 becomes a predetermined value or less, there is a problem that the compressor has to wait until then and the restart is delayed due to a long cooling time.

  An object of the present invention is to provide an outdoor unit for an air conditioner that effectively cools a power device so that it does not take a long time to cool components even when the compressor is stopped due to a protective operation or the like. Is to provide.

In order to achieve the above object, the invention according to claim 1 is a cooling system for cooling a blower chamber in which at least a blower fan is disposed by a partition plate, at least an electrical component module, and a power device of the electrical component module. And an air conditioner outdoor unit that is partitioned into a machine room in which a refrigerant pipe to which the cooler is attached is arranged, and in which the ventilation plate communicates with the blower room and the machine room in the partition plate. The electrical component module includes a main board, a power board on which the power device is mounted, and a fixing plate that is mounted on the machine chamber with the main board mounted on the front surface and the power board mounted on the back surface. The cooler includes: a heat sink thermally coupled to the power device; and a cover for attaching the heat sink to the refrigerant pipe. And, wherein the heat radiating fin is cooled by air flow through the vent of the partition plate in the cover is provided.
The invention according to claim 2 is the outdoor unit of the air conditioner according to claim 1, wherein the heat sink includes a thick plate portion that contacts the power device, a first groove that guides the refrigerant pipe, A first mounting portion formed on the side end and a second mounting portion formed on the other side end;
The cover includes a second groove that guides the refrigerant pipe, a hook portion that engages with the first attachment portion of the heat sink, and a pressing portion that is fixed to the second attachment portion of the heat sink. Features.
According to a third aspect of the present invention, in the outdoor unit for an air conditioner according to the second aspect, the cover of the cooling unit includes a heat radiating plate having convex portions provided on the rear surface of the radiating fin and the radiating fin. A cover main body to which the heat radiating plate is attached, the cover main body being formed in the opening formed to bring the convex portion of the heat radiating plate into contact with the heat sink, the hook portion, and the holding portion. It has the elastic nail | claw engaged with a 2nd attachment part, It is characterized by the above-mentioned.
According to a fourth aspect of the present invention, in the outdoor unit for an air conditioner according to the second aspect, the cover of the cooling unit includes a heat radiating plate having the heat radiating fins and a cover main body to which the heat radiating plate is attached. The cover body includes the hook portion and the presser portion.
According to a fifth aspect of the present invention, in the outdoor unit for an air conditioner according to any one of the first to fourth aspects, the fins are disposed along the direction in which the air flow flows. It is characterized by being.

  According to the present invention, the cooling device for cooling the power device is provided with radiating fins, and the radiating fins are cooled by the air flow generated by the blower fan. However, the power device can be effectively cooled by the blower fan, the cooling time is shortened, and the time until restart can be shortened.

It is a perspective view of the outdoor unit of the Example of this invention. It is a perspective view of the outdoor unit with the service panel removed. It is a perspective view of the outdoor unit in a state where an electrical component module is removed from the machine room. It is an expansion | deployment perspective view of an electrical component module and a cooler. It is attachment explanatory drawing which attaches an upper frame and a lower frame to a partition plate. It is a perspective view of a cooler. It is a longitudinal cross-sectional view of an electrical component module. It is a cross-sectional view of the AA line of FIG. It is the top view which removed the top panel of the outdoor unit. It is the right view which removed the right side panel of the outdoor unit. It is a front view of a main board. It is a front view of a power board. It is explanatory drawing of the path | route of the airflow which cools the cooler of an electrical component module. It is explanatory drawing of another cooler. It is explanatory drawing of another another cooler. It is a circuit diagram of the refrigerant circuit of an air conditioner. It is the front view which removed the service panel of the conventional outdoor unit. It is a front view of the conventional electrical component module.

  1 to 3 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. A stand 118 is attached to the bottom panel 117. The housing 110 is partitioned by a partition plate 119 in the left-right direction so that the back side of the front panel 111 becomes the blower chamber 110A and the back side of the service panel 112 becomes the machine room 110B. The partition plate 119 is formed with a vent hole 119a in the upper portion thereof for communicating the machine room 110B and the blower room 110A.

  The outdoor heat exchanger 11 and the blower fan 11F described above are arranged in the blower chamber 110A. Further, the above-described refrigerant pipe 30, the compressor 12, the expansion valve 14, the accumulator 15, the sub-accumulator 15A, the four-way valve 16, the electrical component module 200, and the like are accommodated in the machine chamber 110B. The machine room 110 </ b> B is visible from the front side of the outdoor unit 100 by removing the service panel 112.

  The electrical component module 200 is shown in FIGS. The electrical component module 200 includes a fixed plate 210 disposed in the machine room 110B so that the front surface faces the back surface of the service panel 112, a long upper frame 220 screwed to the upper portion of the fixed plate 210, and a fixed plate. 210, a long lower frame 230 screwed to the lower part of 210, a mounting bracket 240 for attaching the upper frame 220 to the partition plate 119, a mounting bracket 250 for mounting the lower frame 230 to the partition plate 119, and a part of the control circuit And a power board 270 on which a power device 277, which will be described later, is mounted. .

  As described above, the printed circuit board of the electrical component module 200 is divided into the main board 260 and the power board 270, and the main board 260 has the fixing plate 210 so that the back surface 260 b described later faces the front surface 211 a described below of the fixing plate 210. The power board 270 is mounted on the fixing plate 210 such that a back surface 270b described later faces a back surface 211b described later on the fixing plate 210.

  A cooler 300 is attached to the U-shaped bent portion 31 of the refrigerant pipe 30L as will be described later, and 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.

  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 bending piece 212 are provided. Further, 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 215 bent at 90 degrees downward from the front end of the lower horizontal piece 214 Prepare. 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, a reinforcing upper horizontal piece 222 bent 90 degrees rearward from the upper end of the vertical piece 221, and a vertical piece 211. And a mounting piece 223 bent forward at 45 degrees from the left end thereof. Reference numeral 224 denotes an end portion to which the cooler 300 is attached.

  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. Reference numeral 235 denotes an end portion to which the cooler 300 is attached.

  The cooler 300 includes an aluminum heat sink 310 mounted on the front surface 270a of the power board 270 and thermally coupled to a power device 277, which will be described later, and two semicircular cross sections formed on the heat sink 310. It has a U-shaped bent portion 31 of the liquid-side refrigerant pipe 30 </ b> L fitted in the groove 311, and an aluminum cover 320 for fixing the U-shaped bent portion 31 to the heat sink 310. In addition to the groove 311, the heat sink 310 includes a thick plate portion 312 to which the power device 277 is pressed and thermally coupled, a mounting portion 313 formed on one side end of the thick plate portion 312, and the other side end. It has the attachment part 314 formed in this. The cover 320 includes two grooves 321 having a semicircular cross section fitted into the U-shaped bent portion 31 of the liquid side refrigerant pipe 30L, hook portions 322 formed on one side end, and the other side end. The formed pressing part 323 and the radiation fin 324 formed on the surface opposite to the surface on which the groove 321 is formed are provided. FIG. 6 shows details of the cooler 300.

  As described above, the main board 260 is mounted with the electronic parts and other electronic parts constituting a part of the control circuit on the front face 260a. That is, as shown in FIG. 11, an LED lamp 261a as a display, a display setting circuit 261 including a dip switch 261b and a button switch 261c as an operation unit, and a control IC 262 such as a microcomputer constituting a part of the control circuit. A plurality of connectors 263 arranged in the periphery, an actuator drive circuit 264 for driving the expansion valve 14 and the four-way valve 16, a temperature detection circuit 265 connected to a thermistor (not shown) for detecting the temperature of the pipe 30, and the like are mounted. Yes. Reference numeral 260 b denotes the back surface of the main board 260. 260c is an upper end, 260d is a lower end, 260e is a left end, and 260f is a right end. The main board 260 is mounted on the front surface 211 a so that the back surface 260 b faces the front surface 211 a of the main body 211 of the fixing plate 210.

  On the front surface 270a of the power board 270, electronic components including a power device 277, which will be described later, constituting the remaining part of the control circuit as described above are mounted. That is, as shown in FIG. 12, a diode bridge 271a for rectification, an IGBT (Insulated Gate Bipolar Transistor) element 271b in which a MOSFET is incorporated in the gate portion of the bipolar transistor to reduce the operating resistance, and a fast recovery diode (FRD) for high-speed operation. An element 271c, a power factor correction (PFC) coil 271d, and a smoothing electrolytic capacitor 271e are mounted. These diode bridge 271a, IGBT element 271b, FRD element 271c, PFC coil 271d, electrolytic capacitor 271e, etc. constitute a converter circuit 271 that converts AC power supplied from the outside into DC power and outputs it. Further, an IPM (Intelligent Power Module) element 272 is mounted which forms an inverter circuit that incorporates a drive circuit and a self-protection function and converts AC power supplied from the converter circuit 271 into DC power and outputs the DC power. Furthermore, elements such as a switching transformer 273a and a switching IC 273b that form the switching power supply circuit 273 are mounted. Further, an EMC (ElectroMagnetic Compatibillity) filter circuit 274 for countermeasures against external noise and spontaneous noise including the capacitor 274a and the common mode choke coil 274b is mounted. 270b is the back surface of the power board 270. 270c is an upper end, 270d is a lower end, 270e is a left end, and 270f is a right end. The diode bridge 271a, the IGBT element 271b, the FRD element 271c, the IPM element 272, etc. are power devices 277 that generate a large amount of heat, and are mounted vertically in the vicinity of the left end 270e. The power board 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 is brought into contact with the power device 277.

  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. As a result, the upper frame 220 and the lower frame 230 are attached to the partition plate 119 in a cantilevered manner in a horizontal posture.

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

  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. As shown, the screws B4 and B5 are attached. As a result, the power device 277 of the power board 270 is pressed against the thick plate portion 312 of the heat sink 310 of the cooler 300, where thermal coupling is performed. With the above attachment, the power board 270 of the electrical component module 200 is positioned in the vicinity of the vent hole 119a of the partition plate 119. In this way, after the electrical component module 200 is attached to the machine room 110B, a plug in which necessary wiring is connected to the connector 263 of the main board 260 of the electrical component module 200 is connected, and the terminal board 400 has the required Another wiring is connected.

  As described above, in this embodiment, the main board 260 and the power board 270 are mounted on the fixing board 210 by aligning the back surface with the fixing board 210 attached to the machine room 110B interposed therebetween. The vertical size of the main board 260 and the power board 270 can be significantly reduced compared to the vertical size of the printed board when the main board 260 and the power board 270 are lined up and down, and there is little room in the vertical space. It can be effectively applied to an outdoor unit having

  The power device 277 mounted on the power board 270 is thermally coupled to the cooler 300 on the back surface 211b side of the fixing plate 210, but is only pressed against the cooler 300. If B4 and B5 are loosened, 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 power board 270 is facilitated.

  In addition, since the cooler 300 is located in the vicinity of the ventilation opening 119a of the partition plate 119, when the blower fan 11F of the blower chamber 110A rotates, a clearance or a bottom panel of the mounting portion of the service panel 112 of the machine chamber 110B is rotated. As shown in FIG. 13, when the air flow drawn in from an opening (not shown) formed in 117 flows into the blower chamber 110A via the vent hole 119a, the heat dissipating fins 324 of the cooler 300 are cooled. To do.

  Thus, in this embodiment, the cooler 300 that cools the power device 277 is formed by the heat sink 310 that is thermally coupled to the power device 277 and the cover 320 that couples the refrigerant pipe 31 to the heat sink 310. 320 is provided with heat radiating fins 324. And the radiation fin 324 is cooled by the airflow generated by the blower fan 11F. For this reason, even when the compressor is stopped due to a protection operation or the like and the refrigerant temperature in the refrigerant pipe 30L is high, the cooler 300 is effectively made by the air flow generated by the rotating fan 11F rotating at that time. Can be cooled. Therefore, the time until the power device 277 is cooled after the compressor operation is stopped can be shortened, and the time until the restart can be shortened.

  FIG. 14 shows another example of the cooler 300A. In this heat radiator 300A, the above-described cover 320 is formed by a cover main body 330 having spring properties made of a steel plate shown in FIG. 14B and an aluminum heat radiating plate 340 shown in FIG. 14C. The heat sink 310 is the same as described above. The cover main body 330 is separated into three portions at the top, bottom, and center of the plate-shaped main body portion 331, and an opening 332 is formed. A hook portion 333 is formed on one end side of the main body portion 331, and the other side end. The presser portion 334 is formed with elastic claws 334a at three locations separated into the upper and lower sides and the center. The heat radiating plate 340 is separated into three portions at the top and bottom and the center of the main body 341 to form heat radiating fins 342, and is fitted into the opening 3332 of the cover main body 330 on the back surface opposite to the side where the heat radiating fins 342 are formed. A convex portion 343 having a shape and a size is formed. The heat radiating fins 342 are formed so that the individual fins 342a are arranged vertically.

  In assembly, the heat radiating plate 340 is attached to the cover main body 330 with screws B6 so that the projections 343 of the heat radiating plate 340 fit into the openings 332 of the cover main body 330. The hook portion 333 of the cover body 330 is engaged with one attachment portion 313 of the heat sink 310, the elastic claw 334 a is engaged with the other attachment portion 314 of the heat sink 310, and the presser portion 334 is attached to the attachment portion of the heat sink 310. When screwed to 314, it is assembled as shown in FIG.

  In this cooler 300 </ b> A, the convex portion 343 on the back surface of the heat radiating plate 340 contacts the heat sink 310 from the opening 332 of the cover main body 330, so that heat from the heat sink 310 is transmitted to the heat radiating plate 340 without being affected by the cover main body 330. Is done. Further, since the individual fins 342a of the heat dissipating fins 342 of the heat dissipating plate 340 are arranged vertically, when the cooler 300A is attached to the refrigerant pipe 31, the air flow generated by the blower fan 11F is the fin 342a. Flowing along. That is, since the individual fins 342a are arranged along the direction in which the air flow flows, the cooling effect by the air flow is increased.

  FIG. 15 shows still another example of the cooler 300B. In the radiator 300B, the above-described cover 320 is constituted by an aluminum cover main body 350 shown in FIG. 15B and an aluminum radiator plate 340 shown in FIG. 15C. The cover body 350 is formed with two semicircular grooves 352 into which the refrigerant pipe 31 is fitted on the back surface of the flat surface portion 351, a hook portion 353 is formed at one side end, and the presser portion 354 is at the other side end. It has become.

  In assembling, first, the heat radiating plate 340 is attached to the cover body 350 with screws B7. Then, when the hook portion 353 of the cover main body 350 is engaged with one attachment portion 313 of the heat sink 310 and the holding portion 354 is screwed to the other attachment portion 314, the assembly is performed as shown in FIG.

  In this cooler 300 </ b> B, the convex portion 343 on the back surface of the heat radiating plate 340 contacts the cover main body 350 and the cover main body 350 contacts the heat sink 310, so that heat from the heat sink 310 passes through the cover main body 350. Is transmitted to. The effect that the individual fins 342a of the heat dissipating fins 342 of the heat dissipating plate 340 are arranged vertically is the same as that of the cooler 300A.

30L: Liquid side refrigerant pipe, 31: U-shaped bent part 100: Outdoor unit, 110: Housing, 110A: Blower 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, 119a: Ventilation port 200: Electrical component module 210: Fixed plate, 211: Main body, 211a: front surface, 211b: back surface, 212: upper horizontal piece, 213: upper vertical piece, 214: lower horizontal piece, 215: lower vertical piece 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, 250: Mounting bracket 260: Main board, 260a: Front, 26 0b: Back surface 270: Power board, 270a: Front surface, 270b: Back surface, 277: Power device 300, 300A, 300B: Cooler, 310: Heat sink, 320: Cover, 324: Radiation fin, 330, 350: Cover body, 340 : Heat dissipation plate, 342: heat dissipation fin, 342a: fin 400: terminal plate

Claims (5)

A machine in which a casing is a partition plate, a blower chamber in which at least a blower fan is arranged, at least an electrical component module, a cooler for cooling a power device of the electrical component module, and a refrigerant pipe to which the cooler is attached An outdoor unit of an air conditioner that is partitioned into a chamber and in which a ventilation port that communicates the blower chamber and the machine chamber with the partition plate is formed,
The electrical component module includes a main board, a power board on which the power device is mounted, and a fixing plate on which the main board is mounted on the front and the power board is mounted on the back and attached to the machine room.
The cooler includes a heat sink that is thermally coupled to the power device and a cover for attaching the heat sink to the refrigerant pipe, and the cover is cooled by an air flow that flows through the ventilation port of the partition plate. The outdoor unit of the air conditioner characterized by being provided with the radiating fin. In the outdoor unit of the air conditioner according to claim 1,
The heat sink includes a thick plate portion that contacts the power device, a first groove that guides the refrigerant pipe, a first attachment portion formed on one side end, and a second attachment formed on the other side end. With
The cover includes a second groove that guides the refrigerant pipe, a hook portion that engages with the first attachment portion of the heat sink, and a pressing portion that is fixed to the second attachment portion of the heat sink. A featured outdoor unit of an air conditioner. In the outdoor unit of the air conditioner according to claim 2,
The cover of the cooling unit includes a heat radiating plate having a projection provided on the back surface of the heat radiating fin and the heat radiating fin, and a cover body to which the heat radiating plate is attached.
The cover main body has an opening formed to bring the convex portion of the heat radiating plate into contact with the heat sink, the hook portion, and an elastic claw that is formed in the pressing portion and engages with the second attachment portion. An air conditioner outdoor unit characterized by the above. In the outdoor unit of the air conditioner according to claim 2,
The cover of the cooling unit includes a heat radiating plate having the heat radiating fins, and a cover body to which the heat radiating plate is attached.
The cover main body includes the hook portion and the presser portion, and is an outdoor unit for an air conditioner. In the outdoor unit of the air conditioner as described in any one of Claims 1 thru | or 4,
The outdoor unit of an air conditioner, wherein each of the heat dissipating fins is arranged along a direction in which the air flow flows.

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