JP7013981B2 - Electrical components module - Google Patents

Description

The present invention relates to an electrical component module attached to a machine room at the back of a service panel in front of an outdoor unit of an air conditioner.

As shown in FIG. 17, a general air conditioner includes an outdoor unit 10 installed outdoors 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 steam compression type refrigeration cycle.

The outdoor unit 10 is supplied with lubricating oil from a mixed fluid of lubricating oil and refrigerant discharged from an outdoor heat exchanger 11, a blower fan 11F, a compressor 12 for compressing the refrigerant, and a compressor 12 for heat exchange between the outdoor air and the refrigerant. An oil separator 13 for separation, an expansion valve 14 for expanding the inflowing refrigerant to reduce the pressure to a predetermined pressure, an accumulator 15 for separating the inflowing refrigerant into gas and liquid, a four-way valve 16 for switching between heating operation and cooling operation, and the like are provided. There is. Further, the indoor unit 20 is provided with an indoor heat exchanger 21 for exchanging heat between indoor air and a 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. 18, the outdoor unit 10 is divided into a heat exchanger room 10A and a machine room 10B in the left-right direction by a partition plate 171, and the heat exchanger room 10A has the above-mentioned outdoor heat. The exchanger 11 and the blower fan 11F are arranged. The above-mentioned compressor 12, oil separator 13, expansion valve 14, accumulator 15, four-way valve 16 and the like are housed in the machine room 10B, and these are service panels (not shown) on the front surface of the housing 17 as shown in FIG. By removing the, it becomes visible from the outside.

Further, in the machine room 10B, an electrical component module 40 is arranged at a substantially intermediate position in the vertical direction thereof. The electrical component module 40 includes a control circuit that controls the overall operation of the air conditioner, a setting circuit for making various settings of the air conditioner, a display circuit that displays the state of the air conditioner, and an AC supplied from the outside. It is a module equipped with a converter circuit that converts power into DC power and outputs it, an inverter circuit that converts DC power output from the converter circuit into AC power and outputs it, and other circuits. It is equipped with multiple electronic components to realize the circuit. The printed circuit board 41 is composed of one printed circuit board so as to secure a piping space on the back side of the machine room 10B.

FIG. 19 shows the front surface of the electrical component module 40. The printed circuit board 41 is mounted in the machine room 10B in an upright posture. The printed circuit board 41 is divided into a light electric region 41A and a high electric region 41B in the vertical direction and arranged.

In the light electric region 41A, electronic parts such as a microcomputer that constitutes a part of the control circuit, electronic parts for operation such as a switch 41A1 that constitutes a setting circuit, a low power connector 41A2 for inserting and removing a plug, an LED 41A3, and the like are used. Electronic components for display of are installed. Further, in the high power region 41B, a plurality of electronic components of the high power system for performing power conversion constituting the rest of the control circuit described above, for example, a power device 41B1 such as an IC of a converter circuit and an IC of an inverter circuit, for smoothing. Parts such as a large-capacity electrolytic capacitor 41B2 and a high-power connector 41B3 are mounted.

Further, in the high electric region 41B, a cooler 50 for cooling the heat generated by the power device 41B1 is arranged. The cooler 50 includes a heat sink (not shown) having a shape that can be attached to the liquid side refrigerant pipe 30L of the refrigerant pipe 30. The heat sink is arranged on the front side of the printed circuit board 41 toward the service panel side (not shown) so that the heat generated by the power device 41B1 is transferred. The refrigerant condensed by the outdoor heat exchanger 11 flows through the liquid-side refrigerant pipe 30L during the cooling operation, and the refrigerant condensed by the indoor heat exchanger 21 and depressurized by the expansion valve 14 flows during the heating operation. The heat exchanger 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 above-mentioned outdoor unit 10, all the electronic components are mounted on one printed circuit board 41, and the cooler 50 is attached to the front side of the printed circuit board 41, that is, the side facing the front of the housing 17. Here, in order to reduce the vertical size of the printed circuit board 41, the printed circuit board 41 is divided into a main board on which weak electric electronic components are mounted and a power board on which high electric electronic components including the power device 41B1 are mounted, and the main board thereof is divided. It is conceivable that the substrate and the power substrate are stacked back to back and non-contactly and arranged in the machine room 10B.

At this time, the main board and the power board so that the main board on which the electronic components for operation and display are mounted faces the front side of the housing 17, and the power board on which the power device or the like is mounted faces the back side. Will be placed. Then, the power device soldered to the power board is screwed to the cooler 50, and the cooler 50 is attached to the refrigerant pipe 30L at the back side of the machine room.

Therefore, if it becomes necessary to remove the electrical component module after assembly, the electrical component module must be removed as a unit with the cooler, and then the electrical component module must be removed from the cooler. That is, it is necessary to remove not only the electrical component module but also the cooler 50 from the refrigerant pipe 30L, which complicates the work.

An object of the present invention is an electrical component module in which a main board and a power board are placed back to back in a non-contact manner in a machine room and the power device of the power board on the back side is screwed to a cooler. Is to be able to be easily removed from the cooler.

In order to achieve the above object, the invention according to claim 1 is described in an electrical component module in which a power device is cooled by a cooler attached to a refrigerant pipe in a machine room of an air conditioner closed by a service panel. The main board on which the electronic components constituting a part of the control circuit for controlling the air conditioner are mounted on the front, and the electronic components including the power device constituting the rest of the control circuit are mounted on the front and described above. The main board and the power board are mounted so that the back surface of the main board faces the front surface and the back surface of the power board faces the back surface of the power board having the first opening in which the power device is exposed on the back surface side. The fixed plate is provided with a fixing plate having a second opening facing the first opening, and the fixing plate is attached to the machine chamber so that the front surface of the main board faces the service panel. An electrical component module in which a power device is screwed to the cooler, wherein the main board includes a main board retracting mechanism for exposing the second opening of the fixing plate toward the service panel. It is a feature.
The invention according to claim 2 is characterized in that, in the electrical component module according to claim 1, the main board retracting mechanism is a board clamper for attaching and detaching the main board to and from the fixing plate.
According to a third aspect of the present invention, in the electrical component module according to the first aspect, the main board retracting mechanism is a board holder fixed to the back surface of the main board, and the main board of the board holder is the first. 2 It is characterized in that it is rotatably attached to the fixing plate by a hinge so as to cover or expose the opening.
The invention according to claim 4 is characterized in that, in the electrical component module according to claim 3, the substrate holder is formed with a third opening for avoiding contact with a circuit pattern on the back surface of the main substrate. do.
The invention according to claim 5 is a control for controlling the air conditioner in an electrical component module in which a power device is cooled by a cooler attached to a refrigerant pipe in a machine room of the air conditioner closed by a service panel. The main board on which the electronic components constituting a part of the circuit are mounted on the front surface and the electronic components including the power device constituting the remaining part of the control circuit are mounted on the front surface and the power device is exposed on the back surface side. The main board and the power board are mounted so that the back surface of the main board faces the front surface of the power board on which the first opening is formed and the back surface of the power board faces the back surface, and the back surface of the main board faces the first opening. The fixing plate is attached to the machine room so that the front surface of the main board faces the service panel, and the power device is screwed to the cooler. The electrical component module to be stopped, characterized in that the main substrate is formed in a shape and size that does not block the second opening of the fixing plate.
According to a sixth aspect of the present invention, in the electrical component module according to any one of claims 1 to 5, the fixing plate is screwed to an upper frame and a lower frame attached to the machine room, and the cooler is the same. It is characterized in that it is attached so as to straddle the upper frame and the lower frame.
The invention according to claim 7 is the electrical component module according to any one of claims 1 to 6, wherein the cooler couples a heat sink to which the power device is screwed and the heat sink to the refrigerant pipe. It is characterized by having a cover and a heat sink.

According to the present invention, since the power device of the power board can be directly accessed from the side of the main board, the electrical component module can be easily removed from the cooler.

It is a perspective view of an outdoor unit. It is a perspective view of the outdoor unit with the service panel removed. It is a perspective view of the outdoor unit of the same outdoor unit with the electrical component module removed from the machine room. It is a developed perspective view of an electrical component module and a cooler. It is an installation explanatory view which attaches an upper frame and a lower frame to a partition plate. It is a vertical sectional view of an electrical component module. FIG. 6 is a cross-sectional view taken along the line AA of FIG. It is a top view which removed the top panel of an outdoor unit. It is the right side view which removed the right side panel of an outdoor unit. It is a front view of the main board. It is a front view of a power board. It is sectional drawing of the main board attached to the fixing plate which shows the main board retracting mechanism of 1st Embodiment. It is a top view of the board holder and the fixing plate which shows the main board retracting mechanism of 2nd Embodiment. (A) is a plan view in which the main board is attached to the board holder of the second embodiment, and (b) is a sectional view of (a). (A) is a normal cross-sectional view of the board holder, the main board and the fixing plate of the second embodiment, and (b) is a cross-sectional view when the board holder and the main board are rotated. It is sectional drawing which shows the 3rd Example. It is a circuit diagram of the refrigerant circuit of an air conditioner. It is a front view which removed the service panel of a conventional outdoor unit. It is a front view of the conventional electrical component module.

<First Example>
The outdoor unit having the main board evacuation mechanism of the first embodiment of this invention will be described. As shown in FIGS. 1 to 3, the outdoor unit 100 has 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, and a top panel. A 115, a back panel 116, and a bottom panel 117 are provided, and a stand 118 is attached to the bottom panel 117.

The housing 110 is partitioned in the left-right direction by a partition plate 119 so that the back side of the front panel 111 becomes the heat exchanger room 110A and the back side of the service panel 112 becomes the machine room 110B. The 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 room 110A. Further, the above-mentioned refrigerant pipe 30, compressor 12, expansion valve 14, accumulator 15, sub-accumulator 15A, four-way valve 16 and the like are housed in the machine room 110B. The machine room 110B can be visually recognized from the front side of the outdoor unit 100 by removing the service panel 112.

Reference numeral 200 denotes an electrical component module, which is a fixing plate 210 arranged in the machine chamber 110B so that the front surface faces the back surface of the service panel 112, and is screwed to the upper portion of the fixing plate 210, as shown in FIGS. 4 to 11. The long-shaped upper frame 220, the long-shaped lower frame 230 screwed to the lower part of the fixing plate 210, the mounting bracket 240 for attaching the upper frame 220 to the partition plate 119, and the lower frame 230 for the partition plate 119. The mounting bracket 250 to be attached to the main board 260 on which the electronic components and other electronic components that form a part of the control circuit are mounted, and the electronic components and other electronic components that form the rest of the control circuit, which will be described later. A power board 270 on which the power device 274 is mounted is provided.

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

Reference numeral 300 denotes a cooler, which 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 with the U-shaped bent portion 31 of the refrigerant pipe 30L attached.

The fixing plate 210 has a main body portion 211 in which the main board 260 is mounted on the front surface 211a and the power board 270 is mounted on the back surface 211b, and the fixing plate 210 is bent 90 degrees from the upper end of the main body portion 211 toward the back surface 211b for reinforcement. It includes an upper horizontal piece 212 and an upper vertical piece 213 for mounting that is bent 90 degrees upward from the rear end of the bent piece 212. Further, a reinforcing lower horizontal piece 214 bent 90 degrees from the lower end of the main body 211 toward the front surface 211a, and a lower vertical piece 215 bent 90 degrees downward from the front end of the lower horizontal piece 214. Be prepared. Mounting portions 215a projecting downward are formed at both ends of the lower vertical piece 215.

A vertically long opening 216 is formed on the right side of the main body 211 in FIG. Further, a substrate clamper 280 is attached near each of the four corners of the main body 211. This substrate clamper 280 constitutes the main substrate evacuation mechanism of this embodiment.

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. It is provided with a mounting piece 223 bent at 45 degrees from the left end of the screw to the front. 224 is the end 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. It includes a reinforcing upper vertical piece 233 bent upward by 90 degrees from the back end, and a mounting piece 234 bent 45 degrees from the left end of the lower vertical piece 231 toward the front. A terminal board 400 is attached to the front side of the lower vertical piece 231. Reference numeral 235 is an end to which the cooler 300 is attached.

As shown in FIG. 7, the cooler 300 has an aluminum heat sink 310 to which the power device 274 described later mounted on the front surface 270a of the power substrate 270 is screwed, and the cross section formed on the heat sink 310 is a semicircle. It is composed of a U-shaped bent portion 31 of a liquid-side refrigerant pipe 30L fitted into two grooves 311 of the shape, and a sheet metal 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 has a plate portion 312 to which the power device 274 is screwed and thermally coupled, and cover mounting portions 313 and 314 formed on both sides of the plate portion 312.

The cover 320 has a central presser portion 321 that presses the U-shaped bent portion 31 of the liquid-side refrigerant pipe 30L against the heat sink 310, a hook portion 322 bent from one end of the presser portion 321 and the other end of the presser portion 321. A mounting portion 323 bent so as to face the hook portion 322 is provided.

On the front surface 260a of the main board 260, electronic components and other electronic components that form a part of the control circuit are mounted as described above. That is, as shown in FIG. 10, 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 are used. , Multiple connectors 263 arranged in the peripheral part, EMC (ElectroMagnetic Compatibillity) filter circuit 264 for countermeasures against external noise and spontaneous noise including capacitor 264a and common mode choke coil 264b, expansion valve 14 and four-way valve 16 are driven. A drive circuit 265, a temperature detection circuit 266 connected to a thermistor (not shown) for detecting the temperature of the pipe 30, and the like are mounted. 260b is the back surface of the main substrate 260. 260c is the upper end, 260d is the lower end, 260e is the left end, and 260f is the right end. 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 portion 211 of the fixing plate 210.

On the front surface of the power board 270, an electronic component including a power device 274 described later, which constitutes the remaining part of the control circuit as described above, is mounted. That is, as shown in FIG. 11, 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 a bipolar transistor to reduce the operating resistance, and an FRD (Fast Recovery Diode) for high-speed operation. An element 271c, a PFC (Power Factor Correction) coil 271d for improving the power factor, and an electrolytic capacitor 271e for smoothing high power are mounted. These diode bridge 271a, IGBT element 271b, FRD element 271c, PFC coil 271d, electrolytic capacitor 271e and the like 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 that constitutes an inverter circuit that incorporates a drive circuit and a self-protection function and converts DC power supplied from the converter circuit 271 into AC power and outputs the power is also mounted. Further, elements such as a switching transformer 273a and a switching IC 273b constituting the switching power supply circuit 273 are also mounted. Reference numeral 270b is the back surface of the power substrate 270. 270c is the upper end, 270d is the lower end, 270e is the left end, and 270f is the right end. The diode bridge 271a, the IGBT element 271b, the FRD element 271c, the IPM element 272, and the like are power devices 274 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 211b so that the back surface 270b faces the back surface 211b of the main body 211 of the fixing plate 210.

As shown in FIG. 4, the power substrate 270 is formed with a vertically long opening 270 g in the region where the power device 274 is arranged. The power device 274 is soldered to the front surface 270a of the power board 270 and screwed to the heat sink 310 of the cooler 300 by a driver (not shown) inserted through the opening 270g.

In order to arrange the electrical component module 200 in the machine room 110B of the outdoor unit 100, first, a mounting bracket 240 having a slope 241 and a mounting bracket 250 having a slope 251 are previously mounted on the partition plate 119. 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 screwed to the top and bottom of the fixing plate 210 are attached to the partition plate 119 in a cantilevered posture in a lateral position.

Next, as shown in FIG. 6, 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 to attach. 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. Then, 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 work is performed with the back panel 116 of the outdoor unit 100 removed. As described above, the cooler 300 is mounted 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 the plate portion 312 of the heat sink 310 faces the service panel 112. Be done.

Further, the power board 260 is mounted on the back surface 211b of the main body portion 211 of the fixing plate 210. Then, the fixing plate 210 on which the power board 270 is mounted is screwed B5 so that the upper vertical piece 213 fits the vertical piece 221 of the upper frame 220 and the lower vertical piece 215 fits the lower vertical piece 231 of the lower frame 230. , Attached by B6. Further, the power device 274 of the power board 270, that is, the diode bridge 271a, the IGBT element 271b, the FRD element 271c, and the IPM element 272 are inserted into the driver from the opening 216 of the fixing plate 210, and the heat sink of the cooler 300 is inserted by the screws B7 to B12. It is coupled to the plate portion 312 of 310. As a result, as shown in FIGS. 6 and 7, the power device 274 is thermally coupled to the heat sink 310.

Next, when the four corners of the main board 260 are connected to the four board clampers 280 of the front 211a of the main body 211 of the fixing plate 210, as shown in FIG. 12, the front 211a of the main board 211 is connected. The main board 210 is attached. After the electrical component module 200 is attached to the machine room 110B as described above, a plug to which the required 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 wire is connected.

As described above, in this embodiment, the main board 260 and the power board 270 are mounted on the fixing plate 210 with the fixing plates 210 screwed to the upper frame 220 and the lower frame 230 interposed therebetween. The vertical size of the board 260 and the power board 270 can be significantly reduced compared to the vertical size of the printed circuit board when the main board 260 and the power board 270 are arranged one above the other, and the vertical space can be reduced. It can be effectively applied to an outdoor unit having a housing having a small margin.

When removing the electrical component module 200 from the cooler 300, first, the service panel 112 is removed to expose the electrical component module 200. Then, the claw 281 of the substrate clamper 280 attached to the fixing plate 210 is spread outward, and the main substrate 260 is removed from the fixing plate 210.

As a result, the opening 216 of the fixing plate 210 and the opening 270 g of the main substrate 270 are exposed on the side of the service panel 112. Therefore, the driver is inserted into the opening 216 and 270 g, and the screws B7 to B12 of the power device 274 such as the diode bridge 271a, the IGBT element 271b, the FRD element 271c, and the IPM element 272 are removed. As a result, the power device 274 is disengaged from the heat sink 310 of the cooler 300. Therefore, if the fixing plate 210 is removed from the frame 230 having the upper frame 220, the fixing plate 210 can be taken out integrally with the power board 270, and maintenance such as replacement and repair of the electrical component module 200 becomes possible.

If the board clamper 280, which is the first embodiment of the main board retracting mechanism for retracting the main substrate 260 from the fixed plate 210, is used, the main substrate 260 is removed from the substrate clamper 280 and retracted from the fixed plate 210. Since the power device 274 of the power board 270 can be directly accessed from the side where the board 260 is mounted, the electrical component module 200 can be easily removed from the cooler 300.

<Second Example>
13 to 15 are views showing a second embodiment of the main board retracting mechanism when the electrical component module 200 is removed from the cooler 300. Reference numeral 290 is a steel plate board holder as a main board retracting mechanism, which is screwed to the back surface 260b of the main board 260. The substrate holder 290 has an opening 291 formed in the center, two L-shaped hinges 292 formed vertically at the left end portion of FIG. 13 and having an L-shaped tip 292a facing downward, and 2 formed at the right end portion. Each overhang 293, four screw holes 294 formed near the four corners for attachment to the main board 260, and two knobs 293 for attachment to the fixing plate 210. It is provided with two through holes 295.

The fixed plate 210 is formed with two slits 217 in which the two hinges 292 of the board holder 290 are engaged with each other at the left end of the main body 211 of FIG. 13, and the board holder 290 is attached to and detached from the right end. Two screw holes 218 are formed.

As shown in FIG. 14, the board holder 290 is attached to the back surface 260b of the main board 260. This attachment is performed by screwing screws B13 inserted through holes (not shown) at four corners of the main board 260 into the screw holes 294 of the board holder 290. At this time, the circuit pattern of the back surface 260b of the main board 260 is positioned in the opening 291 of the board holder 290, and the main board 260 and the board holder 290 do not come into electrical contact with each other. As described above, the main board 260 is integrated with the board holder 290.

Next, when the hinge 292 of the board holder 290 is pushed into the slit 217 of the fixing plate 210 and then the entire board holder 290 is pushed down, the tip 292a of the hinge 292 engages with the slit 217, and the board holder 290 uses the hinge 292 as a fulcrum. It is rotatably held by the fixing plate 210. When the substrate holder 290 is pressed against the main body portion 211 of the fixed plate 210 in this state, the main substrate 260 closes the opening 216 of the fixed plate 210 as shown in FIG. 15 (a). Therefore, after that, when the screw B14 is screwed into the screw hole 218 of the fixing plate 210 from the through hole 295 of the board holder 290, the main board 260 is fixed to the fixing plate 210. This state is maintained during the operation of the air conditioner.

When the electrical component module 200 is removed from the cooler 300, the service panel 112 is removed to expose the electrical component module 200 in the same manner as in the first embodiment. Then, when the screw B14 is loosened and removed, the overhanging portion 293 of the board holder 290 becomes a free end. Then, when the overhanging portion 293 is pulled in the front direction, the substrate holder 290 rotates, and the opening 216 of the fixed plate 210 and the opening 270 g of the main substrate 270 are exposed to the front. After that, as in the first embodiment, if the screws B7 to B12 of the power device 274 such as the diode bridge 271a, the IGBT element 271b, the FRD element 271c, and the IPM element 272 are removed by the driver, the power device 274 becomes a cooler. It comes off from the heat sink 310 of 300. Then, if the fixing plate 210 is removed from the mounting brackets 240 and 250, the remaining fixed board 210 and power board 270 of the electrical component module 200 can be completely removed, and maintenance such as replacement and repair of the electrical component module 200 can be performed. It will be easy.

As described above, according to the second embodiment, since the power device 274 of the power board 270 can be directly accessed from the side of the main board 260, the electrical component module 200 can be easily removed from the cooler 300.

<Third Example>
In the first and second embodiments described above, an example in which the main board retracting mechanism is used when the main board 260 has an area that substantially covers the front surface 211a of the main body portion 211 of the fixed plate 210 has been described. As shown in 16, if the main board 260A having a size and shape that does not cover the opening 216 of the fixed plate 210 or the opening 270 g of the power board 270 is used, it is not necessary to provide a special evacuation mechanism. In this embodiment, since the opening 216 of the fixing plate 210 and the opening 270 g of the power board 270 are always exposed in the direction of the service panel 112, the screws B7 to B12 of the power device 274 are immediately removed by the driver only by removing the service panel 112. It can be removed to remove the power device 274 from the heat sink 310 of the cooler 300.

Since the size of the main board 260A is small in this embodiment, the number of electronic components that can be mounted on the main board 260A is limited. In order to relax this limitation, the main board 260 may be provided with an opening similar to the opening 216 of the fixed plate 210 or the power board 270 opening 270 g. That is, the main substrate 260 itself may have a shape and size that does not block the openings 216 and 270 g.

As described above, according to the third embodiment, since the power device 274 of the power board 270 can be directly accessed from the side of the main board 260, the electrical component module 200 can be easily removed from the cooler 300.

30L: Liquid side refrigerant piping, 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 equipment module 210: Fixed plate, 211: Main body, 211a: Front , 211b: Back surface, 212: Upper horizontal piece, 213: Upper vertical piece, 214: Lower horizontal piece, 215: Lower vertical piece, 216: Opening, 217: Slit 220: Upper frame, 221: Vertical piece, 222: Horizontal piece , 223: Mounting piece, 224: End 230: Lower frame, 231: Lower vertical piece, 232: Upper horizontal piece, 233: Upper vertical piece, 234: Mounting piece, 235: End 240: Mounting bracket, 241: Slope 250: Mounting bracket, 251: Slope 260: Main board, 260a: Front, 260b: Back side 270: Power board, 270a: Front, 270b: Back side, 270g: Opening, 274: Power device 280: Board clamper 290: Board holder, 291: Opening, 292: Hinge, 293: Overhang 300: Cooler, 310: Heat sink, 320: Cover 400: Terminal plate

Claims (7)

In an electrical component module in which a power device is cooled by a cooler attached to the refrigerant piping in the machine room of an air conditioner closed by a service panel.
The main board on which the electronic components constituting a part of the control circuit for controlling the air conditioner is mounted on the front, and the electronic components including the power device constituting the rest of the control circuit are mounted on the front. The main board and the power board face each other so that the back surface of the main board faces the front surface and the back surface of the power board faces the back surface of the power board having the first opening exposed to the back surface side of the power device. It is provided with a fixing plate mounted and having a second opening facing the first opening, and the fixing plate is attached to the machine room so that the front surface of the main board faces the service panel. An electrical component module in which the power device is screwed to the cooler.
The main board is an electrical component module including a main board retracting mechanism for exposing the second opening of the fixing plate in the direction of the service panel. In the electrical component module according to claim 1,
The main board retracting mechanism is an electrical component module characterized by being a board clamper for attaching and detaching the main board to and from the fixing plate. In the electrical component module according to claim 1,
The main board retracting mechanism is a board holder fixed to the back surface of the main board.
The substrate holder is an electrical component module characterized in that the main substrate is rotatably attached to the fixing plate by a hinge so as to cover or expose the second opening. In the electrical component module according to claim 3,
The board holder is an electrical component module characterized in that a third opening for avoiding contact with a circuit pattern on the back surface of the main board is formed. In an electrical component module in which a power device is cooled by a cooler attached to the refrigerant piping in the machine room of an air conditioner closed by a service panel.
The main board on which the electronic components constituting a part of the control circuit for controlling the air conditioner is mounted on the front, and the electronic components including the power device constituting the rest of the control circuit are mounted on the front. The main board and the power board face each other so that the back surface of the main board faces the front surface and the back surface of the power board faces the back surface of the power board having the first opening exposed to the back surface side of the power device. It is provided with a fixing plate mounted and having a second opening facing the first opening, and the fixing plate is attached to the machine room so that the front surface of the main board faces the service panel. An electrical component module in which the power device is screwed to the cooler.
An electrical component module characterized in that the main substrate is formed in a shape and size that does not block the second opening of the fixing plate. In the electrical component module according to any one of claims 1 to 5.
An electrical component module characterized in that the fixing plate is screwed to an upper frame and a lower frame attached to the machine room, and the cooler is attached so as to straddle the upper frame and the lower frame. In the electrical component module according to any one of claims 1 to 6.
The cooler is an electrical component module comprising a heat sink to which the power device is screwed and a cover for coupling the heat sink to the refrigerant pipe.

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