JPWO2017029696A1 - Air conditioner outdoor unit - Google Patents

Abstract

Provided is an outdoor unit for an air conditioner that can visually check the state of each terminal of a switching element arranged on a control board and that can avoid a short circuit between the terminals. Is a semiconductor device having a main body part and a plurality of terminals extending from the main body part, a main body fixing part that supports the main body part, and a terminal protruding from the main body fixing part so as to avoid a short circuit with an adjacent terminal An element fixing member having a short-circuit prevention wall surrounding the semiconductor device, a control board to which the semiconductor device and the element fixing member are attached, and a terminal surrounded by the short-circuit prevention wall so as to cover the short-circuit prevention wall and the main body portion And an insulating member having transparency.

Description

  The present invention relates to an outdoor unit of an air conditioner including a control board on which semiconductor devices such as switching elements are arranged.

  Patent Document 1 discloses a control board on which a switching device is arranged, and a fixing device for attaching a power transistor, which is an example of a switching element, is arranged on the control board. In the power transistor fixing device described in Patent Document 1, a guide groove that electrically insulates each terminal of the power transistor is provided in a holder to which the power transistor is attached. That is, the fixing device described in Patent Document 1 is configured to hold the power transistor by inserting the terminal of the power transistor into the guide groove of the insulating fixing member in order to prevent a short circuit between the terminals. Is.

No. 4-3502

  However, in the power transistor fixing device of Patent Document 1, since each terminal of the power transistor is inserted into the guide groove of the insulating fixing member, each terminal is covered with the insulating fixing member, and the state of each terminal There was a problem that it could not be confirmed visually.

  The present invention has been made to solve the above-described problems, and enables visual confirmation of the state of each terminal of a semiconductor device disposed on a control board and avoids a short circuit between adjacent terminals. An object is to provide an outdoor unit of an air conditioner.

  An outdoor unit of an air conditioner according to the present invention protrudes from a main body part, a semiconductor device having a plurality of terminals extending from the main body part, a main body fixing part that supports the main body part, and the main body fixing part. An element fixing member having a short-circuit prevention wall surrounding the terminal so as to avoid a short circuit with an adjacent terminal, a control board to which the semiconductor device and the element fixing member are attached, the short-circuit prevention wall, and the main body portion And a transparent insulating member disposed so as to cover the terminal surrounded by the short-circuit prevention wall.

  According to the present invention, by providing the element fixing member with the short-circuit prevention wall, it is possible to insulate between the terminal surrounded by the short-circuit prevention wall and the adjacent terminal. Further, since the terminals of the semiconductor device are covered with a transparent insulating member, the state of each terminal of the semiconductor device can be visually confirmed. Therefore, according to the present invention, it is possible to provide an outdoor unit for an air conditioner capable of visually checking the state of each terminal of a semiconductor device arranged on a control board and avoiding a short circuit between adjacent terminals. Can do.

It is the perspective view which showed roughly an example of the external appearance structure of the outdoor unit 1 of the air conditioner which concerns on Embodiment 1 of this invention. It is the perspective view which showed roughly an example of the internal structure of the outdoor unit 1 of the air conditioner which concerns on Embodiment 1 of this invention. It is the perspective view which showed roughly an example of the electrical component box 9 which concerns on the outdoor unit 1 of the air conditioner of Embodiment 1 of this invention. It is the disassembled perspective view which showed roughly an example of the electrical component box 9 which concerns on the outdoor unit 1 of the air conditioner of Embodiment 1 of this invention. It is the disassembled perspective view which showed roughly an example of arrangement | positioning of some electronic components etc. which are arrange | positioned at the control board 40 which concerns on the outdoor unit 1 of the air conditioner of Embodiment 1 of this invention. It is the disassembled perspective view which showed roughly an example of the 1st element fixing member 62 which fixes the switching element 52 arrange | positioned at the control board 40 which concerns on the outdoor unit 1 of the air conditioner of Embodiment 1 of this invention. . It is the perspective view which expanded and showed schematically the short circuit prevention wall 62b of the 1st element fixing member 62 arrange | positioned at the control board 40 which concerns on the outdoor unit 1 of the air conditioner of Embodiment 1 of this invention. It is the top view which expanded and showed roughly the short circuit prevention wall 62b of the 1st element fixing member 62 arrange | positioned at the control board 40 which concerns on the outdoor unit 1 of the air conditioner of Embodiment 1 of this invention. It is a schematic arrow sectional view in WW of FIG.

Embodiment 1 FIG.
The outdoor unit 1 of the air conditioner according to Embodiment 1 of the present invention will be described. FIG. 1 is a perspective view schematically showing an example of the external structure of an outdoor unit 1 for an air conditioner according to Embodiment 1. FIG. In FIG. 1, the outdoor unit 1 of the air conditioner is configured as a floor-standing type, but may be configured as a wall-mounted type, a roof-standing type, or a ceiling-suspended type, for example.

  In the following drawings including FIG. 1, the dimensional relationship and shape of each component may be different from the actual one. Moreover, in the following drawings, the same code | symbol is attached | subjected to the same or similar member or part, or the code | symbol is abbreviate | omitted. In addition, the positional relationship between the constituent members of the outdoor unit 1 in the following description, for example, the positional relationship such as the vertical relationship, is basically the positional relationship when the outdoor unit 1 of the air conditioner is installed in a usable state. To do.

  The outdoor unit 1 is provided with a front panel 2, a back panel 3, and a top panel 4, and these constitute a part of the casing of the outdoor unit 1. Moreover, the outdoor unit 1 is provided with a bottom panel 5 that faces the top panel 4 and also constitutes a part of the housing. A front panel 2 and a rear panel 3 are attached to the bottom panel 5, and a plurality of legs 5 a serving as a base for fixing the outdoor unit 1 to the installation location are provided on the bottom surface of the bottom panel 5. Since the bottom panel 5 is not shown in the perspective view of FIG. 1, the position of the panel corresponding to the bottom panel 5 is indicated by a lead line with an arrow together with a reference numeral.

  The front panel 2 has a horizontally long first side surface portion 2a and a vertically long second side surface portion 2b, and is L-shaped when viewed from above the outdoor unit 1, that is, from the top panel 4 side. This is a sheet metal panel bent into a half. A rectangular grill 6 for exhausting the air inside the outdoor unit 1 to the outside is disposed on the second side surface 2b side of the first side surface portion 2a. Moreover, although not shown in figure, the 2nd side part 2b can be provided with the some slit for taking in outdoor air to the inside of the outdoor unit 1. FIG. In addition, since the 2nd side part 2b is not illustrated in the perspective view of FIG. 1, the position of the side surface applicable to the 2nd side part 2b is shown with the lead line with the arrow with the code | symbol. The front panel 2 may be composed of two sheet metal panels.

  The back panel 3 is a sheet metal panel that is bent so as to be L-shaped when viewed from the top panel 4 side. The back panel 3 has a vertically long third side surface portion 3a facing the second side surface portion 2b, and a vertically long fourth side surface facing the surface of the first side surface portion 2a on the third side surface portion 3a side. Part 3b. Although not shown, the third side surface portion 3a is provided with a plurality of openings for drawing a plug connected to an external power source and a refrigerant pipe into the inside. In addition, a service cover 7 is attached to the third side surface portion 3a so as to cover a plurality of openings provided in the third side surface portion 3a and prevent entry of dust or water. The service cover 7 is provided with an opening for drawing a plug connected to an external power source and a refrigerant pipe. In addition, since the 4th side surface part 3b cannot be illustrated in the perspective view of FIG. 1, the position of the side surface applicable to the 4th side surface part 3b is shown with the lead line with the arrow with the code | symbol. The back panel 3 may be composed of two sheet metal panels.

  The top panel 4 is a sheet metal panel that covers the top of the outdoor unit 1, and is attached to the upper sides of the front panel 2 and the back panel 3.

  FIG. 2 is a perspective view schematically showing an example of the internal structure of the outdoor unit 1 of the air conditioner according to the first embodiment. FIG. 2 is obtained by removing the front panel 2, the back panel 3, and the top panel 4 from the outdoor unit 1 of the air conditioner of FIG.

  Inside the outdoor unit 1, a plate-like separator 8 that is fixed to the bottom panel 5 and extends between the first side surface portion 2 a of the front panel 2 and the fourth side surface portion 3 b of the back panel 3 is disposed. Has been. The internal space of the outdoor unit 1 is partitioned into a machine room 10 and a blower room 20 by the plate-like separator 8.

  The machine room 10 is a space surrounded by the first side surface portion 2a of the front panel 2, the back panel 3, the top panel 4, the bottom panel 5, and the separator 8, and dust or water from the outside of the outdoor unit 1 is present. It has a structure that can avoid the intrusion. For example, a compressor 12 is accommodated in the machine room 10. The compressor 12 is a fluid machine that compresses sucked low-pressure refrigerant and discharges it as high-pressure refrigerant, and is installed on the bottom panel 5. In FIG. 2, the compressor 12 includes a suction muffler 12a that separates the liquid refrigerant. As the compressor 12, for example, a rotary compressor, a scroll compressor, or the like can be applied. Further, the machine room 10 accommodates a plurality of refrigerant pipes 14 that connect the respective components constituting the refrigeration cycle circuit.

  The blower chamber 20 constitutes a space surrounded by the front panel 2, the top panel 4, the bottom panel 5, the heat exchanger 22, and the separator 8. The blower chamber 20 takes in outdoor air from the outside of the outdoor unit 1 through a plurality of slits provided in the heat exchanger 22 or the second side surface 2b of the front panel 2, and grills the air inside the outdoor unit 1 6 is configured to be able to exhaust air to the outside of the outdoor unit 1 through 6.

  In the outdoor unit 1, the heat exchanger 22 functions as a condenser during the cooling operation, and functions as an evaporator during the heating operation. The heat exchanger 22 can be configured as a fin-and-tube heat exchanger including a plurality of fins arranged in parallel and a heat transfer tube penetrating the plurality of fins, and the outdoor unit 1 is arranged so that the heat transfer tubes are horizontal. Be placed. In addition, in FIG. 2, although the fin and tube type heat exchanger comprised so that it might become L shape seeing from the top | upper surface panel 4 side was illustrated as the heat exchanger 22, the shape of the heat exchanger 22 is shown. In addition, it may be configured in a flat plate shape or a U shape. Moreover, in an air conditioner provided with the outdoor unit 1, the condenser may be referred to as a radiator and the evaporator may be referred to as a cooler.

  The blower chamber 20 accommodates a blower fan 24 and a blower fan support member 26 that supports the blower fan 24.

  The blower fan 24 is configured as an axial fan such as a propeller fan, for example. The blower fan 24 is arranged at a position facing the heat exchanger 22 and the grill 6, and the rotation axis of the blower fan 24 is arranged to face the horizontal direction.

  The blower fan support member 26 is a plate-like support member configured to be U-shaped when viewed from the second side surface portion 2 b side of the front panel 2. For example, the upper surface portion 26 a of the blower fan support member 26 is fixed to the top panel 4, and the lower surface portion 26 b of the blower fan support member 26 is fixed to the bottom panel 5. A motor that drives the blower fan 24 is supported at the center of the side surface portion 26c of the blower fan support member 26 that extends between the upper surface portion 26a and the lower surface portion 26b of the blower fan support member 26.

  When the outdoor unit 1 is driven and the blower fan 24 rotates, the outdoor air is blown from the outside of the outdoor unit 1 through the heat exchanger 22 or the plurality of slits provided in the second side surface portion 2b of the front panel 2. It is taken into the chamber 20. In the heat exchanger 22, heat exchange is performed between outdoor air that passes between the fins of the heat exchanger 22 and a heat exchange medium such as a refrigerant that flows through the heat transfer tubes. The air exchanged by the heat exchanger 22 is exhausted from the blower chamber 20 to the outside of the outdoor unit 1 through the grill 6 by the blower fan 24.

  An electrical component box 9 is accommodated in the outdoor unit 1. The electrical component box 9 is disposed across the machine room 10 and the blower room 20, and is attached to the upper part of the separator 8. The electrical component box 9 includes, for example, a group of electrical components such as a circuit board and terminals that supply power to the compressor 12 and the blower fan 24.

  Next, the structure of the electrical component box 9 in the outdoor unit 1 of the air conditioner of Embodiment 1 will be described.

  FIG. 3 is a perspective view schematically showing an example of the electrical component box 9 according to the outdoor unit 1 of the air conditioner of the first embodiment. In FIG. 3, the electrical component box 9 removed from the separator 8 of the outdoor unit 1 of FIG. 2 is illustrated.

  The electrical component box 9 in the outdoor unit 1 of the air conditioner includes a circuit unit 200 and a terminal unit 300. In the interior of the outdoor unit 1 in FIG. 2, the circuit unit 200 is disposed across the machine room 10 and the blower room 20, and is attached to the upper part of the separator 8. The terminal portion 300 is disposed in the machine room 10 and is attached to the end portion of the circuit portion 200 on the third side surface portion 3 a side of the back panel 3.

  FIG. 4 is an exploded perspective view schematically showing an example of the electrical component box 9 according to the outdoor unit 1 of the air conditioner of the first embodiment. 4 is an exploded view of the electrical component box 9 of FIG.

  The terminal unit 300 is configured to be detachable from the circuit unit 200, and includes a plurality of terminal blocks 32 and a terminal block support member 34 that supports the plurality of terminal blocks 32. For example, a plug of wiring connected to an external commercial power source is connected to the plurality of terminal blocks 32 via the service cover 7. The plug connection portions of the plurality of terminal blocks 32 are attached to the terminal block support member 34 so as to face the direction of the third side surface portion 3a of the back panel 3. Attachment portions of the plurality of terminal blocks 32 are arranged so as to extend obliquely downward from the end portion of the circuit portion 200 on the third side surface portion 3a side of the back panel 3.

  The circuit unit 200 includes a control board 40 to which electronic components such as capacitors and resistors are attached by soldering. The control board 40 is provided with an inverter circuit that controls the frequency of the alternating current that drives the motors of the compressor 12 and the blower fan 24. The inverter circuit is an electronic circuit that generates frequency-controlled alternating current from direct current. Further, the control board 40 may be provided with a converter circuit that converts an alternating current flowing from the external power source through the terminal block 32 into a direct current. The converter circuit may be mounted integrally on the same control board 40 as the inverter circuit, or may be mounted on a control board different from the inverter circuit.

  In the following description, the surface portion of the control board 40 refers to the surface on the side where the electronic component is attached. In FIG. 4, the surface portion of the control board 40 corresponds to the lower surface of the control board 40. Further, the back surface portion of the control board 40 refers to a surface on the side where the electronic component is soldered. In FIG. 4, the back surface portion of the control board 40 corresponds to the upper surface of the control board 40.

  The circuit unit 200 includes a control board support member 210 and a control board protection member 220 on the back surface side of the control board 40. The control board support member 210 is attached to the control board 40 and supports the peripheral edge portion and the back surface portion of the control board 40. For example, the control board support member 210 protects the control board 40 from an external impact or the like. In addition, a lattice-shaped frame 210 a that supports the back surface portion of the control board 40 is formed inside the control board support member 210.

  The control board protection member 220 is fitted into the control board support member 210 and covers the entire lattice-shaped frame 210 a of the control board support member 210. By the control board protection member 220, the back surface portion of the control board 40 is protected from intrusion of water or dust. Further, the control board support member 210 is configured to allow the terminal block support member 34 to be attached.

  A heat radiating member 42 is attached to a part of the heat-generating electronic component on the surface of the control board 40, such as a transistor. The heat dissipating member 42 includes a plate-like portion 42 a that covers the electronic component, and a large number of fins 42 b that extend from the plate-like portion 42 a in a direction away from the control board 40. By providing a large number of fins 42b on the heat dissipating member 42, the heat transfer area with the outside air can be increased, so that the heat generated in the electronic component can be efficiently released. Further, by disposing the heat radiating member 42 on the side of the blower chamber 20 of the outdoor unit 1, heat can be efficiently released to the air sent from the blower fan 24.

  The circuit unit 200 includes a heat radiation unit protection member 230 and a heat radiation unit support member 240 on the surface portion side of the control board 40. The heat radiation part protection member 230 is configured to cover the plate-like part 42a of the heat radiation member 42 and prevent water or dust from entering the plate-like part 42a. Further, the heat radiation portion protection member 230 is provided with a large number of rectangular slits for penetrating the fins 42b, and is configured so as not to disturb heat release in the fins 42b.

  The heat dissipating part support member 240 has an L-shaped appearance when viewed from the first side face part 2 a side of the front panel 2. The heat radiation part support member 240 is attached to the control board support member 210 and has a frame body part 240 a that covers and supports the plate-like part 42 a of the heat radiation member 42 and the heat radiation part protection member 230. Further, the heat radiating part support member 240 has side wall parts 240 b extending in the same direction as the fins 42 b of the heat radiating member 42. The front end portion of the side wall portion 240 b is attached to the upper portion of the separator 8, and the side wall portion 240 b functions as a wall that partitions the machine chamber 10 and the blower chamber 20.

  Next, the arrangement of electronic components and the like on the control board 40 will be described.

  FIG. 5 is an exploded perspective view schematically showing an example of a partial arrangement of electronic components and the like arranged on the control board 40 according to the outdoor unit 1 of the air conditioner of the first embodiment. In the following description, the positional relationship of the electronic components and the like disposed on the control board 40, for example, the positional relationship such as the vertical relationship, is the positional relationship when the surface portion of the control board 40 is disposed upward. In the following description, as shown in FIG. 5, the long side direction of the control board 40 is the x direction, the short side direction is the y direction, and the direction perpendicular to the surface portion of the control board 40 is the z direction.

  A plurality of heat-generating semiconductor devices 50 are arranged on the control board 40. Examples of the exothermic semiconductor device 50 include a switching element 52, a freewheeling diode 54, a bridge diode 56, and a large scale integrated circuit 58. The switching element 52 is a transistor such as an insulated gate bipolar transistor or a metal oxide semiconductor field effect transistor, and has three terminals extending from a main body containing a semiconductor material. The free-wheeling diode 54 is a semiconductor element that protects the switching element 52 from a backflow current, and has two terminals that extend from a main body containing a semiconductor material. The bridge diode 56 is a semiconductor element that rectifies an alternating current flowing from an external power supply, and has four terminals extending from a main body containing a semiconductor material. The large-scale integrated circuit 58 can be configured as, for example, a microprocessor that controls the switching element 52 to control the frequency at which the motors of the compressor 12 and the blower fan 24 are driven. It has a terminal. The insulated gate bipolar transistor is also abbreviated as IGBT. The metal oxide semiconductor field effect transistor is also referred to as a MOSFET for short. A large scale integrated circuit is also referred to as LSI for short.

  A plurality of element fixing members 60 are arranged on the control board 40, and the main body of the semiconductor device 50 is fixed to the element fixing member 60. The terminals of the semiconductor device 50 are inserted into holes provided in the control board 40 and fixed by soldering on the back side of the control board 40. In FIG. 5, the first element fixing member 62, the second element fixing member 64, the third element fixing member 66, and the fourth element fixing member 68 are arranged on the control board 40 as the element fixing member 60. Has been. The first element fixing member 62 is a member that fixes the switching element 52. The second element fixing member 64 is a member that fixes the reflux diode 54. The third element fixing member 66 is a member that fixes the bridge diode 56. The fourth element fixing member 68 is a member that fixes the large-scale integrated circuit 58. In FIG. 5, the first element fixing member 62, the second element fixing member 64, and the third element fixing member 66 are integrally formed, but each is configured as a separable fixing member. Alternatively, it may be configured as a fixing member that cannot be separated. Further, the first element fixing member 62, the second element fixing member 64, and the third element fixing member 66 may be configured as separate fixing members.

  A first heat radiating sheet 44 and a second heat radiating sheet 46 are provided between the main body of the semiconductor device 50 and the plate-like portion 42 a of the heat radiating member 42. Specifically, the first heat dissipation sheet 44 is disposed between the main body of the switching element 52 and the reflux diode 54 and the heat dissipation member 42. The second heat radiation sheet 46 is disposed between the main body of the bridge diode 56 and the large-scale integrated circuit 58 and the heat radiation member 42. The first heat radiating sheet 44 and the second heat radiating sheet 46 can improve the adhesion between the main body of the semiconductor device 50 and the heat radiating member 42 and promote heat conduction. Note that the first heat radiation sheet 44 and the second heat radiation sheet 46 may be integrally formed, or may be separately provided for each semiconductor device 50. Further, instead of the first heat radiating sheet 44 and the second heat radiating sheet 46, thermally conductive grease such as silicon grease is applied to the main body of the semiconductor device 50, and the plate-like portion 42a of the heat radiating member 42 is applied to the applied surface. May be adhered to promote heat conduction.

  The heat radiating member 42, the first heat radiating sheet 44 and the second heat radiating sheet 46, the main body of the semiconductor device 50, and the element fixing member 60 are screwed to the control board 40 by screws from the back surface of the control board 40. Fixed.

  Next, as an example of the element fixing member 60 that fixes the semiconductor device 50, the configuration of the first element fixing member 62 that fixes the switching element 52 will be described in detail.

  FIG. 6 is an exploded perspective view schematically showing an example of the first element fixing member 62 that fixes the switching element 52 arranged on the control board 40 according to the outdoor unit 1 of the air conditioner of the first embodiment. It is. That is, FIG. 6 is a schematic exploded perspective view showing the first element fixing member 62 of FIG. 5 in an enlarged manner.

  As shown in FIG. 6, the switching element 52 includes a flat body portion 52a covered with resin, three conductive terminals extending from the body portion 52a, that is, a first terminal 52b and a second terminal. A terminal 52c and a third terminal 52d are provided. The first terminal 52b, the second terminal 52c, and the third terminal 52d extend, for example, in an L shape from the main body portion 52a toward the control board 40, and the tip portion is provided on the control board 40. And is fixed to the back surface of the control board 40 by soldering. The first terminal 52b is a terminal located at the center of the main body 52a when viewed from the yz plane side of the coordinate axis. The second terminal 52c is a terminal located on the left side of the main body 52a when viewed from the yz plane side of the coordinate axis. The third terminal 52d is a terminal located on the right side of the main body 52a when viewed from the yz plane side of the coordinate axis. The first terminal 52b, the second terminal 52c, and the third terminal 52d are terminals that receive a pulse signal for driving the switching element 52 output from the large scale integrated circuit 58, for example. By controlling the operation of the switching element 52 with a pulse signal, a frequency-controlled alternating current is generated by the inverter circuit of the control board 40. And the operation | movement of the electric motor of the compressor 12 and the ventilation fan 24 will be controlled by the alternating current by which frequency control was carried out.

  The first element fixing member 62 has a main body fixing portion 62 a that fixes the main body portion 52 a of the switching element 52. When the main body portion 52a of the switching element 52 is fixed to the main body fixing portion 62a, the flat surface of the main body portion 52a is arranged in the upward direction, that is, the arrow direction of the z axis. The tip portions of the L-shaped first terminal 52b, second terminal 52c, and third terminal 52d are arranged in the downward direction, that is, in the direction opposite to the arrow direction of the z axis.

  The first element fixing member 62 includes a short-circuit prevention wall 62b that protrudes in the direction opposite to the x-axis arrow direction from the upper surface portion and side surface portion of the main body fixing portion 62a located in the direction opposite to the x-axis arrow direction. Have. The short-circuit prevention wall 62b is formed in a U shape in a top view. The short-circuit prevention wall 62b is configured to surround only the first terminal 52b, which is the central terminal of the switching element 52, with the body portion 52a of the switching element 52. Moreover, the front-end | tip part of the 1st terminal 52b is arrange | positioned so that the space between the U-shaped short circuit prevention wall 62b and the side part of the main body fixing | fixed part 62a may be penetrated.

  FIG. 7 is an enlarged perspective view schematically showing the short-circuit prevention wall 62b of the first element fixing member 62 arranged on the control board 40 according to the outdoor unit 1 of the air conditioner of the first embodiment. is there. As shown in FIG. 7, a transparent insulating member 70 is provided between the U-shaped short-circuit prevention wall 62 b and the main body 52 a of the switching element 52. As a material of the insulating member 70, an insulating and transparent material can be used. For example, the insulating member 70 can be made of silicone. By providing the insulating member 70, the first terminal 52b is not exposed to the outside, so that high insulation between the second terminal 52c and the third terminal 52d can be maintained.

  The insulating member 70 is formed by filling an insulating material such as silicone between the U-shaped short-circuit prevention wall 62 b and the main body 52 a of the switching element 52. Hereinafter, the shape of the short-circuit prevention wall 62b necessary for forming the silicone insulating member 70 will be described with reference to FIGS.

  FIG. 8 is an enlarged top view schematically showing the short-circuit prevention wall 62b of the first element fixing member 62 arranged on the control board 40 according to the outdoor unit 1 of the air conditioner of the first embodiment. is there. That is, FIG. 8 is a schematic view in the xy plane when the U-shaped short-circuit prevention wall 62b of FIG. 7 is viewed from the arrow direction of the z axis. 9 is a schematic cross-sectional view taken along the line WW in FIG. In FIG. 8, a region where the insulating member 70 is disposed is illustrated by a dot pattern.

  8 and 9, the side wall portion of the short-circuit prevention wall 62b arranged in parallel between the first terminal 52b and the third terminal 52d is defined as the first side wall portion 62c. Further, the side wall portion of the short-circuit prevention wall 62b disposed in parallel between the first terminal 52b and the second terminal 52c is defined as a second side wall portion 62d. Further, a side wall portion that is connected between the first side wall portion 62c and the second side wall portion 62d and forms the U-shaped short-circuit prevention wall 62b is defined as a third side wall portion 62e.

  In FIG. 8, the shortest distance between the first side wall 62c and the first terminal 52b is the first distance d1. The shortest distance between the second side wall 62d and the first terminal 52b is a second distance d2. The shortest distance between the third side wall 62e and the first terminal 52b is a third distance d3.

  In FIG. 9, the ridgeline of the first side wall part 62c or the second side wall part 62d is indicated by a dotted line. Further, the maximum value of the height of the third side wall 62e with respect to the surface portion of the control board 40 is defined as the first height h1, and the height of the first terminal 52b with respect to the surface portion of the control board 40 is defined. The maximum value is the second height h2.

  When the first distance d1, the second distance d2, and the third distance d3 in the short-circuit prevention wall 62b of FIG. 8 are larger than 2 mm, the silicone filling amount increases, so the manufacturing cost of the outdoor unit 1 increases. there's a possibility that. In addition, when the first distance d1, the second distance d2, and the third distance d3 are smaller than 2 mm, the silicone does not reach the first terminal 52b due to the viscosity of the silicone, and the first terminal 52b is protected. There is a possibility of falling into a defect. Considering the above, the short-circuit prevention wall 62b is configured such that the first distance d1, the second distance d2, and the third distance d3 are about 2 mm.

  Further, as shown in FIG. 9, the first height h1 of the third side wall portion 62e is made larger than the second height h2 of the first terminal 52b, whereby the upper surface of the first terminal 52b. Parts can be uniformly coated with silicone. In the short prevention wall 62b, the first height h1 of the third side wall 62e is greater than the second height h2 of the first terminal 52b in consideration of the viscosity of silicone and the manufacturing cost of the outdoor unit 1. It is configured to be about 2 mm higher.

  As shown in FIG. 8, the attachment portion 52e of the first terminal 52b to the main body portion 52a has a flat upper surface portion, and is compared with the tip portion of the first terminal 52b in the y-axis. Since the width is widened in the direction, the distance from the first side wall 62c or the second side wall 62d is narrow. Accordingly, if the height of the first side wall 62c or the second side wall 62d on the side of the mounting portion 52e is the same as the first height h1 of the third side wall 62e, the silicone is caused by the viscosity of the silicone. There is a possibility that the first terminal 52b may be poorly protected without reaching below the mounting portion 52e. Therefore, as shown in FIG. 9, the ridgeline of the first side wall portion 62c or the second side wall portion 62d is directed toward the upper surface of the main body fixing portion 62a so that the inclination θ with respect to the horizontal direction is about 50 °. The first side wall part 62c or the second side wall part 62d is formed. By setting the inclination θ to about 50 °, a gap is created around the attachment portion 52e and the fluidity of the silicone is improved, so that the silicone can reach the lower portion of the attachment portion 52e evenly.

  As described above, the outdoor unit 1 of the air conditioner of Embodiment 1 includes the main body 52a and a plurality of terminals extending from the main body 52a, that is, the first terminal 52b and the second terminal. 52c and a semiconductor device 50 such as a switching element 52 having a third terminal 52d, a main body fixing portion 62a that supports the main body portion 52a, and a second terminal 52c and a third terminal that protrude from the main body fixing portion 62a. An element fixing member 60 such as a first element fixing member 62 having a short circuit prevention wall 62b surrounding a terminal such as the first terminal 52b so as to avoid a short circuit with an adjacent terminal such as 52d; Between the control board 40 to which the element fixing member 60 is attached, the short-circuit prevention wall 62b, and the main body 52a are arranged so as to cover the terminals such as the first terminal 52b surrounded by the short-circuit prevention wall 62b. It is the, and an insulating member 70 having transparency.

  According to the configuration of the first embodiment, by providing the element fixing member 60 with the short-circuit prevention wall 62b, the terminals surrounded by the short-circuit prevention wall 62b and the adjacent terminals can be insulated. In addition, since the plurality of terminals of the semiconductor device 50 are all covered with the transparent insulating member 70, the state of all the terminals can be visually confirmed. Therefore, according to the configuration of the first embodiment, it is possible to visually confirm a plurality of terminals of the semiconductor device 50 arranged on the control board 40, and the terminals surrounded by the short-circuit prevention wall 62b, the adjacent terminals, and It is possible to provide a highly reliable outdoor unit 1 of an air conditioner that can avoid a short circuit.

  Further, according to this configuration, since the terminal surrounded by the short-circuit prevention wall 62b can be electrically insulated from the adjacent terminal, even when a small animal such as an insect enters and contacts the terminal, Short circuit can be prevented. In the example of the first embodiment, the second terminal 52c and the third terminal 52d of the switching element 52 are not electrically insulated, but the second terminal 52c and the third terminal The shortest creepage distance to 52d is, for example, about 12 mm. Therefore, in the example of the first embodiment, if the electrical component box 9 is configured so that a small animal exceeding a creepage distance, for example, 12 mm cannot enter the control board 40, the second terminal 52c and the third terminal 52d A short circuit can be avoided.

  Further, in the outdoor unit 1 of the first embodiment, the insulating member 70 can be made of silicone. By making the insulating member 70 made of silicone, the insulating member 70 can be manufactured at low cost.

  In the outdoor unit 1 of the first embodiment, the semiconductor device 50 has, for example, three terminals such as a first terminal 52b, a second terminal 52c, and a third terminal 52d. The short-circuit prevention wall 62b can be configured to surround a central terminal such as the first terminal 52b among the three terminals. According to this configuration, a short circuit between the terminals of the semiconductor device 50 having three terminals typified by transistors can be prevented, and the control board 40 can be stably operated. Can be improved.

  Further, in the outdoor unit 1 of the first embodiment, the semiconductor device 50 can be configured as the switching element 52. Since the compressor 12 and the blower fan 24 can be stably driven by preventing a short circuit between adjacent terminals of the switching element 52, the reliability of the outdoor unit 1 can be improved.

  Moreover, in the outdoor unit 1 of the first embodiment, the short-circuit prevention wall 62b can be configured in a U shape when viewed from above. By configuring the short-circuit prevention wall 62b in a U-shape, the distance between the short-circuit prevention wall 62b and the terminal surrounded by the short-circuit prevention wall 62b is set to a distance appropriate for filling the insulating member 70 such as silicone, for example, The short-circuit prevention wall 62b can be configured so as to be maintained at about 2 mm.

Other embodiments.
The present invention is not limited to the first embodiment described above, and various modifications can be made without departing from the gist of the present invention. For example, in the above-described embodiment, the outdoor unit 1 of the air conditioner is taken as an example, but the present invention is also applicable to an outdoor unit other than the air conditioner, such as an outdoor unit of a heat pump water heater. .

  The machine room 10 can be configured to accommodate, for example, an accumulator, an oil separator, a refrigerant flow switching device, a decompression device, and the like.

  In the first embodiment described above, the first terminal 52b, which is the center terminal, is surrounded by the short-circuit prevention wall 62b. However, the second terminal 52c and the third terminal 52d, which are terminals at both ends, are provided. You may comprise so that it may each surround with a separate short circuit prevention wall. That is, the short-circuit prevention wall 62b has a creeping distance between terminals at both ends, for example, small animals such as insects exceeding 12 mm invaded by disposing the insulating member 70 inside the short-circuit prevention walls provided at the terminals at both ends. Even in this case, a short circuit of the switching element 52 can be prevented. The short-circuit prevention wall 62b of the first embodiment may be used to electrically insulate adjacent terminals of the free wheeling diode 54, the bridge diode 56, and the large scale integrated circuit 58 from each other. Note that the element fixing member 60 for fixing the free wheeling diode 54, the bridge diode 56, the large scale integrated circuit 58, and the like surrounds the terminals so as to avoid a short circuit with the adjacent terminals, and has a number of short circuits smaller than the number of terminals. It can comprise so that it may have the prevention wall 62b.

  Each embodiment can be implemented in combination with each other.

  DESCRIPTION OF SYMBOLS 1 Outdoor unit, 2 Front panel, 2a 1st side part, 2b 2nd side part, 3 Back panel, 3a 3rd side part, 3b 4th side part, 4 Top panel, 5 Bottom panel, 5a Leg, 6 Grill, 7 Service cover, 8 Separator, 9 Electrical box, 10 Machine room, 12 Compressor, 12a Suction muffler, 14 Refrigerant piping, 20 Blower room, 22 Heat exchanger, 24 Blower fan, 26 Blower fan Support member, 26a Upper surface portion, 26b Lower surface portion, 26c Side surface portion, 32 Terminal block, 34 Terminal block support member, 40 Control board, 42 Heat radiation member, 42a Plate-shaped portion, 42b Fin, 44 First heat radiation sheet, 46 2 heat dissipation sheet, 48 screw, 50 semiconductor device, 52 switching element, 52a main body, 52b first terminal, 52c second terminal, 52d third Terminal, 52e mounting portion, 54 freewheeling diode, 56 bridge diode, 58 large scale integrated circuit, 60 element fixing member, 62 first element fixing member, 62a main body fixing portion, 62b short-circuit prevention wall, 62c first side wall portion, 62d 2nd side wall part, 62e 3rd side wall part, 64 2nd element fixing member, 66 3rd element fixing member, 68 4th element fixing member, 70 Insulating member, 200 Circuit part, 210 Control board support Member, 210a frame, 220 control board protection member, 230 heat radiation part protection member, 240 heat radiation part support member, 240a frame body part, 240b side wall part, 300 terminal part.

Claims (5)

A semiconductor device having a main body portion and a plurality of terminals extending from the main body portion;
An element fixing member having a main body fixing portion that supports the main body portion, and a short-circuit prevention wall that protrudes from the main body fixing portion and surrounds the terminal so as to avoid a short circuit with an adjacent terminal;
A control board to which the semiconductor device and the element fixing member are attached;
An outdoor unit of an air conditioner comprising: a transparent insulating member disposed between the short-circuit prevention wall and the main body so as to cover a terminal surrounded by the short-circuit prevention wall. The outdoor unit for an air conditioner according to claim 1, wherein the insulating member is made of silicone. The outdoor unit of an air conditioner according to claim 1 or 2, wherein the semiconductor device has three terminals, and the short-circuit prevention wall surrounds a central terminal among the three terminals. The outdoor unit of an air conditioner according to any one of claims 1 to 3, wherein the semiconductor device is a switching element. The outdoor unit for an air conditioner according to any one of claims 1 to 4, wherein the short-circuit prevention wall has a U shape in a top view.

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