JP2007132606A - Outdoor unit for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small outdoor unit for an air conditioner suppressing applying of a physical load to electrical components from the outside. <P>SOLUTION: In the outdoor unit for the air conditioner, an electrical component case has a board back face case, a board with one edge side fixed such that a board back face faces the board back face case, and the electrical components such as an inverter module arranged in laying states in another edge side area of a board top face, a support member being a support member fixed to the board back face case and supporting and fixing an end side of the board so as to bridge the board back face case and the board by supporting a portion arranged with the inverter module, and a board top face case covering a top face side of the board. A thickness of another edge side of the board top face case is provided smaller than a thickness nearer to a one edge side, and the electrical component case is fixed to a partition plate such that a portion with the smaller thickness faces a blower. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an outdoor unit of an air conditioner.

A general separation type air conditioner includes an indoor unit and an outdoor unit. The indoor unit is equipped with a minimum amount of equipment to send the conditioned air. The outdoor unit has a heat exchanger, a blower, a compressor to send the refrigerant, and an electrical box for controlling the operation (electricity). Product case).

  The inverter module placed in the electrical box has a particularly large calorific value, so it is important to dissipate the module, and heat is also dissipated for other components such as a rectifier diode that converts AC power to DC. Is important. As a heat dissipation measure, it is widely performed to increase the heat dissipation effect by attaching a heat dissipation fin or through the wind.

As a conventional example of an electrical component box to which such a temperature rise prevention measure is taken, there is Patent Document 1 or the like.
In the technique described in Patent Document 1, the back surface of the board on which the circuit pattern is disposed is the upper side, and the upper surface of the substrate on which various electrical components are disposed is the lower side. At the end of the substrate, it was arranged perpendicular to the substrate surface. Moreover, this board | substrate was assembled | attached to the resin-made attachment support body, and this was accommodated in the case body (board | substrate upper surface case), and was comprised as an electrical component box by being covered with the cover body (board | substrate back surface case). On the lower side of the resin mounting support, a reinforcing bar and an upward support for supporting the substrate are integrally provided.

  In addition, a radiator is fixed to the surface of the vertically placed electrical control component with screws from the lateral direction, and the mounting support also has a vertical opening at a corresponding position in order to realize such a configuration. In other words, a vertical opening is formed by providing a part standing on the side of the mounting support, and further attaching a gap seal, and the radiator is screwed to the vertically placed electrical control component surface through the vertical opening that is a frame. It was attached with. This radiator faced the heat exchange fan chamber provided with the refrigerant heat exchanger fan.

JP 09-060928 A Japanese Patent Application Laid-Open No. 11-230583 Japanese Patent Laid-Open No. 06-147555

FIG. 16 is a schematic front view of the outdoor unit viewed from the same direction as that in FIG. 4 and shows the configuration of the above-described conventional technique. Here, 4 is a blower, 13 is an electrical product case, 14 is a substrate, and a broken line is an electrical component. The outdoor unit 1 must also be provided with other heat exchangers, compressors, etc. The size of the outdoor unit 1 is mainly the size of the blower 4 and the electrical case 13 in the horizontal direction in the figure. The size and their positional relationship are dominant. In the figure, the size of the blower 4 is dominant in the vertical direction, but the thickness (vertical size) of the electrical component case 13 is also related. The thickness of the electrical component case 13 is dominated by the height from the substrate 14 (the dimension in the direction perpendicular to the substrate) among the electrical components disposed on the substrate.

In the figure, the blower 4 and the electrical case 13 are exaggerated in close proximity to each other, but in order to make a product, it is necessary to maintain a safe distance so that they never come into contact with each other. Therefore, in such an electrical product case 13, there is a limit to shortening the distance between the blower 4 and the electrical product case 13, and there is a limit to miniaturization of the outdoor unit 1.
Further, when the inverter module is vertically mounted on the substrate 14 and the heat radiating fins are attached thereto as shown in (a), the structure is such that the heat radiating fins are supported by the terminals (one row) of the inverter module.

  In this case, when assembling or the like, if the housing of the outdoor unit 1 or the like and the radiating fin exposed from the electrical product case 13 are in contact, the load generated by the contact is also applied to the terminal of the inverter module. Loads in the horizontal direction (perpendicular to the inverter module or parallel to the board) can be received by the mounting support, but loads in the vertical direction (parallel to the inverter module or perpendicular to the board) are applied to the inverter module. Must be received only at the terminal. This is not always preferable on the product.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a small outdoor unit for an air conditioner. It is another object of the present invention to provide a downsized outdoor unit for an air conditioner in which an external physical load is not easily applied to an electrical component.

  The object of the present invention is achieved mainly by adopting the following configuration.

  In the outdoor unit for an air conditioner provided with an electrical component case disposed across a partition plate that partitions a blower chamber in which a blower is disposed and a machine chamber in which a compressor is disposed. The case includes a substrate rear case, a substrate that is fixed on one side so that the substrate rear surface faces the substrate rear case, and an electrical component such as an inverter module that is placed on the other side of the substrate upper surface. A support member fixed to the substrate back case, wherein the other end side of the substrate is supported by supporting a portion where the inverter module is disposed so as to bridge the substrate back case and the substrate. A support member for supporting and fixing; and a substrate upper surface case covering the upper surface side of the substrate; and the thickness dimension of the substrate upper surface case on the other side is smaller than the thickness dimension closer to the one side. Comb, the so as to face the portion of the smaller the thickness to the blower, fixed outdoor unit for an air conditioner to the electrical component case on the partition plate.

  Further, in addition to the above-described configuration, the one side of the smoothing capacitor as the electric component is provided by disposing the electric component necessary for the input of the inverter module on the other side of the inverter module. It is also possible to adopt a configuration that is arranged on the side.

  In addition to the above-described configuration, the support member may have a configuration having two planes parallel to each other and one slope inclined with respect to these planes.

  In addition to the above-described configuration, the support member may have a configuration having two planes parallel to each other and one plane perpendicular to these planes.

  In addition to the above configuration, a configuration in which the substrate is supported and fixed by the support member by screwing from the substrate upper surface case side may be employed.

  Further, in addition to the above-described configuration, a metal thin plate provided with screw holes is fixed to the substrate, and the thin plate is provided between the substrate and the inverter module, and the support member The inverter module with holes for screw penetration is disposed between the thin plate and the thin plate and the support member are screwed to fix the substrate and the support member. A configuration can also be adopted.

  In addition to the above-described configuration, a configuration in which the support member is made of metal and a radiating fin is provided on the support member exposed on the outer surface of the electrical component case may be employed.

  Further, in addition to the above configuration, the shape of the upper surface case of the substrate on the other side is stepped, and heat radiation fins are provided on the flat portion of the support member exposed on the outer surface of the electrical product case. A configuration can also be adopted.

  In addition to the above-described configuration, an opening is provided in the electrical case facing the machine room, and a yoroid-shaped window is provided in the upper surface case of the substrate so that the machine room communicates with the blower room. Such a configuration can also be adopted.

  In addition to the above-described configuration, the electrical component includes a diode module, and the support body supports the portion where the inverter module and the diode module are disposed, thereby supporting the other end side of the substrate. It is also possible to adopt a configuration for supporting and fixing.

  In addition to the above configuration, the substrate back case has a flange surface parallel to the substrate for attaching the support member, and the support member is attached to the substrate for attachment to the back case. The substrate upper surface case has a supporting member clamping surface for pressing the planar portion in the direction of the rear case, and the planar portion of the supporting member is the flange of the substrate rear case. It is also possible to adopt a configuration that is sandwiched between the surface and the support member clamping surface of the substrate upper surface case.

  In addition to the above-described configuration, a configuration in which a seal member is disposed between the substrate and the substrate rear case can be employed.

ADVANTAGE OF THE INVENTION According to this invention, the outdoor unit for air conditioners can be reduced in size. In addition, it is possible to realize a downsized outdoor unit for an air conditioner in which an electrical component is hardly subjected to an external physical load.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is an external perspective view of an outdoor unit, FIG. 2 is a perspective view showing an internal structure of the outdoor unit and a state where an electrical component case is removed, FIG. 3 is a plan view of the structure of the outdoor unit, and FIG. 4 is a front view of the structure of the outdoor unit. FIG. 5 is a plan view of the electric component mounting surface side of the substrate, FIG. 6 is a side view of FIG. 5 in which the electric components are disposed on the substrate, and FIG. FIG. 8 is a perspective view showing the assembled state of the entire electrical product case, FIG. 9 is an external perspective view after assembly of the entire electrical product case, and FIG. 10 is a bottom view after assembly of the entire electrical product case. 11 is a side view after assembling the entire electrical case, FIG. 12 is a cross-sectional view taken along the line PP in FIG. 10 after the entire electrical case is assembled, and FIG. 13 is an enlarged cross-sectional view in the vicinity of the substrate fixing support member.

First, the outdoor unit will be described with reference to FIGS.
Reference numeral 1 denotes an outdoor unit, which is covered with a housing 2 (top surface 2a, right side surface 2b, and the like). On the front side, a grill 3 for sending the wind that has passed through the heat exchanger 5 of the air conditioner to the outside is provided on one side of the front side. A blower 4 is arranged in the back direction at a position facing the grill 3, and a cross fin pipe type heat exchanger 5 is arranged in the back. The blower 4 is positioned in front of the heat exchanger 5, and the grill 3 is positioned further in front. The heat exchanger 5 is disposed in a substantially L shape from the side surface to the back surface of the outdoor unit 1 and secures as large an area as possible to enhance the heat exchange capability. The blower 4 also has a large diameter as much as possible. In principle, in the description of all the drawings, the directions such as up, down, left, right, front and rear (front back) are as shown in the coordinate axes of FIG.

A partition plate 6 is provided on the right side in the left-right direction, and partitions the heat exchange air blowing chamber 7 and the machine chamber 8. As described above, the blower 4 and the heat exchanger 5 are arranged in the heat exchange air chamber 7. In the machine room 8, a compressor 9, a refrigerant adjustment tank 10, refrigerant feed pipes 11, 12 and the like are arranged.
In order to rotate the compressor 9 at high speed by inverter control, it is necessary to increase the current flowing in the circuit. For this purpose, the capacity and size of the electrical product are usually increased, and the electrical product case 13 for storing it is also increased. Therefore, although it is a limited space above the blower 4 and the compressor 9, the electrical product case 13 is mounted flat in a relatively wide space. In other words, the electrical product case 13 is a flat box.

  The mounting position of the electrical component case 13 is the uppermost stage close to the top plate 2 a of the outdoor unit 1. A substrate upper surface case 36 is fixed above the partition plate 6 across the blower chamber 7 and the machine chamber 8. Therefore, the electrical product case 13 is fixed to the partition plate 6. Although the electrical product case 13 will be described later, FIG. 2 shows a state where the half-assembled product (13x) of the substrate and the substrate rear case and the substrate upper surface case 36 are removed. The electrical product case 13 is assembled by attaching the semi-assembled product 13x finished with various wirings to the substrate upper surface case 36 fixed to the partition plate 6.

Next, a board | substrate is demonstrated using FIG. 5 and FIG.
Reference numeral 14 denotes a substrate, and FIG. 5 shows an electric component arrangement surface (upper surface of the substrate), which is viewed from the bottom to the top when the electric product case 13 is mounted on the outdoor unit 1. . The substrate 14 is provided with various electrical components on the electrical component placement surface, which is the upper surface of the substrate, and is provided with an electrical circuit pattern (copper foil wiring pattern) in which wiring is previously provided with copper foil or the like on the back surface of the substrate. The back surface of the board is colored, for example, in green or the like, and is a surface for soldering terminals (electric component legs) of the electrical component. Here, a so-called single-sided substrate in which the copper foil wiring pattern is applied only to the back surface will be described here, but the copper foil wiring pattern may be applied over the upper surface (multiple layers) of the substrate.

  Reference numeral 15 denotes an inverter module, which is mounted on the substrate 14 with the surface portions parallel to each other. The module incorporates a semiconductor switching element that supplies rotational power, that is, power to the motor circuit for the compressor 9, its input / output drive circuit, and the like, and is the component that generates the largest amount of heat. Therefore, the inverter module 15 must be actively cooled. In addition, the terminal row | line | column is arrange | positioned on both right and left sides in the shape of a foot. The left terminal row mainly has an input relationship, and the right terminal row mainly has an output relationship, and a diode 15b and a capacitor 15c are arranged on the input terminal row side.

  Reference numeral 15b denotes a small component diode, and 15c denotes a small component capacitor, which is arranged in the vicinity of the substrate end in the vicinity of the inverter module 15, that is, in a region on the side. For example, the two parts 15b and 15c are used as a set, and the bootstrap circuit is configured by three sets to operate the upper arm switching element in the inverter module 15. Further, the space above these small parts (below when the electrical product case 13 is mounted on the outdoor unit 1) can be utilized as a position where the support member 35 described later is disposed.

With this configuration, the inverter module 15 that generates a large amount of heat can be disposed closer to the center of the substrate, so that the strength of the substrate 14 can be maintained even if a large number of small holes for inserting terminals are formed.
Reference numeral 16 denotes a diode module for rectification, which is mounted on the substrate 14 with the surface portions parallel to each other like the inverter module 15. The module 16 incorporates a voltage doubler rectifier circuit that converts commercial AC power into DC. This module 16 is the component that generates the second most heat after the inverter module 15. Therefore, the module 16 must also be actively cooled.

  Reference numerals 18 and 19 denote smoothing capacitors for making the voltage waveform rectified by the diode module 16 into a flat direct current waveform, and standing near the diode module 16. The smoothing capacitors 18 and 19 have the largest height dimension among the electric parts disposed on the substrate 14, and this restricts the height dimension of the electric product case.

The height (thickness) of the electrical case 13 is limited by the smoothing capacitors 18 and 19 having a large size in the vertical direction of the substrate 14. For flat parts such as the inverter module 15 and the diode module 16, there is no problem even if the thickness of the electrical case 13 is reduced. Therefore, if the inverter module 15 or the like is disposed in the region on the side of the substrate 14 and the smoothing capacitors 18 and 19 are disposed inward of the substrate 14 from the position thus disposed, the region on the side of the substrate 14 is provided. That is, the dimension of the end portion of the electrical component case 13 can be reduced.
Reference numeral 20 denotes a power relay which operates when there is a command for operation, stop, etc. from the indoor unit. The command is transmitted from the hybrid IC 21. The hybrid IC 21 receives a signal from the indoor unit and controls the exchange with the components in the board 14, and is therefore arranged at the approximate center convenient for the circuit configuration. Reference numeral 22 denotes a power source (5 V) for the hybrid IC 21 that drives the power source.

  Reference numeral 27 denotes a noise filter coil constituting the main part of the noise filter circuit, which prevents the noise of the power supply circuit including the inverter module 15 and the like from going outside. This prevents malfunction of peripheral products such as electrical components and related devices on the board 14 and air conditioners. Reference numeral 24 denotes a switching transformer for supplying a DC low voltage (15 V) such as a motor for the blower 4 based on the operation of a switching IC 25 located nearby.

  Reference numeral 26 denotes a smoothing capacitor for flattening a commercial AC power source to create a DC voltage waveform. The smoothing capacitor 26 is arranged in the vicinity of the generated DC voltage to send it to the switching IC 25. Reference numeral 28 denotes a current detector for detecting the maximum current limit of the air conditioner. Reference numeral 29 denotes a communication coil, which generates a signal voltage for transmitting and receiving operating conditions between the indoor unit and the outdoor unit 1. Reference numeral 30 denotes a stopper, which is a thin plate extending over two modules, and is fixed to the substrate 14.

Next, the structure of the electrical component case 13, which is a main member, will be described with reference to FIGS. FIG. 7 is an illustration when looking up from below, and FIG. 8 is an illustration when looking down from above.
Reference numeral 31 denotes a metal substrate rear case. The left side which is one end has a flange surface A which is bent outwardly in parallel with the substrate 14 at the lower end of the left side plate, and the flange surface A has a screw hole for fixing to the support member 35. Two Aa are provided, and two screw-in holes Ca for fixing to the substrate upper surface case 36 are provided outside the two holes Aa.

  On the right side which is the other end, flanges are formed by bending a small portion which is a part of the front side (front side) plate and the back side (rear side) plate inwardly in parallel with the substrate 14 at the lower end of the side plate. Each flange surface B is provided with one screw-in hole Ba for fixing to the substrate 14.

  A corner B at one end of the substrate 14 is provided with a hole Bb for fixing the substrate rear case. Most of the electrical components disposed on the substrate 14 are erected on the upper surface of the substrate by penetrating the base terminals (legs) to the back surface of the substrate. The configuration of the circuit is printed on the back surface of the substrate, and the penetrated terminal is soldered to a predetermined circuit portion. Accordingly, since the soldered portions of various electrical components disposed on the substrate 14 are located between the flange surface B and the top surface plate of the substrate rear case 31, a sufficient distance that these do not come into contact with each other. Must be secured.

  The inverter module 15 is provided with two fixing through holes 15 a for fixing the support member 35 to the substrate 14, and the diode module 16 is provided with one similar fixing through hole 15 b. The fastener 30 (see FIG. 5 and the like) is provided with a screw hole for receiving a screw that has passed through the fixing through holes 15a and 15b.

  The support member 35 has an outer plane portion 35a, an inner plane portion 35b, and a slope portion 35c between these plane portions. Two holes Ab for fixing to the substrate back case 31 are provided in the outer plane portion 35a, and three holes Db for fixing to the stopper 30 of the substrate 14 are provided in the inner plane portion 35b. . The support member 35 is made of aluminum excellent in heat conduction, and a plurality of heat dissipating fins 35d are integrally formed vertically on the foremost and lower surface sides of the outer flat surface portion 35a. Since the support member 35 is made of metal, it has a function of dissipating heat generated by the two modules, and the heat dissipating function is further enhanced by providing a plurality of heat dissipating fins.

  The support member 35 is fixed to the stopper 30, that is, the substrate 14 with screws. Two modules are located between the support member 35 and the stopper 30. If there is no stopper 30 and the support member 35 is attached to two modules, a load is applied to the terminal portions and soldering portions of the two modules, which is not preferable. In severe cases, the legs may break or the soldering may come off, causing contact failure. Such a problem is solved by biting a thin plate.

  When the substrate 14 and the support member 35 fixed in this manner are used as a unit, the unit is attached to the substrate rear case 31. Further, the support member 35 is fixed to the substrate back case 31 and can be regarded as a member for fixing the substrate 14 and the substrate back case 31 to a bridge.

  The support member 35 also has a function of attaching and supporting one side of the substrate 14 to the substrate rear case 31. The reason why the slope 35c is provided is that the support function is sufficiently exerted by the elastic force. The reason why the two modules are close to each other is to simplify the heat dissipating mechanism and enhance the heat dissipating function of the electrical case 13 as a whole.

  A resin sealing member 32 is disposed around the substrate 14. Although the electrical component case 13 is completed without this component, the gap between the substrate 14 and the substrate back surface case 31 is sealed, the electrical component disposed on the substrate 14 is prevented from contacting the substrate upper surface case 36, and the assembling property. This is a part that is required for ease of use.

  The seal member 32 is provided with a plurality of position guides 33 of the substrate 14 slightly projecting on the inner periphery thereof, and a positioning insertion guide 34 for attaching the substrate upper surface case 36 is integrally provided. Note that the height of the position guide 33 in the vertical direction is set such that the substrate 14 and the substrate rear case 31 do not come close to this height, so that they do not contact each other. There is a need. Although the right side in the drawing is regulated by the flange surface B, the height setting is important because there is nothing specially regulated on the left side.

  Reference numeral 36 denotes a substrate upper surface case. When the electrical product case 13 is mounted on the outdoor unit 1, it will be positioned below, but it covers the upper surface of the substrate 14 and is referred to as a substrate upper surface case. The substrate upper surface case 36 is made of a steel plate and has a semi-container shape with a part missing. The lacking portion is a large opening air intake opening 39 which is exposed to the machine room 8 when the electrical component case 13 is mounted on the outdoor unit 1.

  There is a side plate 37 in the front-rear direction (front-back direction), and an air suction yoroid-shaped window 37 a is provided on the side plate 37. Air suction means that air is sucked out from the window into the heat exchange blower chamber 7. When the electrical product case 13 is mounted on the outdoor unit 1, the air inside the electrical product case 13 is blown by the blower 4. Is to be sucked out. In addition, since the air blower 4 rotates clockwise in FIG. 4, it is conceivable that water droplets or the like fly, but the yoroid type window 37a is opened downward to prevent the water droplets or the like from entering. If necessary, the yoroid type window may not be opened directly below, but may be opened at the lower right in FIG. However, balance with air suction using the negative pressure of the blower should be taken into consideration.

  The capacitors 18 and 19 should be arranged as close as possible to the above-mentioned two modules. However, by arranging the capacitors 18 and 19 inside the substrate 14 as much as possible, the end 37b has a height dimension (thickness). )) Is reduced upward to make it thinner.

  In this respect, the conventional technique cannot make the vertical dimension of the substrate upper surface case 36, that is, the vertical dimension of the electrical product case, small and thin in the present embodiment. This is because an inverter module or the like is erected on the edge of the substrate, or the configuration in which the back surface of the substrate is opposite to that of the present embodiment (see FIG. 16).

  In the present embodiment, the arrangement of modules and other electrical components is devised, and the vertical dimension (thickness) of the substrate upper surface case 36, and further the vertical dimension (thickness) of the electrical product case is made smaller and stepped. (In the figure, it is a step, but it may be a slope).

  Specifically, the inverter module 15 was placed on the substrate. Furthermore, the inverter module 15 has a two-row terminal foot (dual inline). Components 15b and 15c for constituting a drive circuit such as a bootstrap circuit are disposed between the end of the substrate and the left terminal row of the inverter module 15. With such a device, the end of the part facing the inside of the blower chamber 7 in the electrical product case 13 straddling the partition plate 6 can be made thin.

  If the capacitors 18 and 19 can be laid on the substrate 14, they can be made thinner and flat without being stepped. However, as shown in FIG. It is difficult to increase the size. Adopting and arranging the dual in-line parts as described above is advantageous in that the size of the entire board is not changed. Of course, it is also possible to obtain the same effect as the dual in-line component by using the one-row type component and the fastener 30.

At the end opposite to the opening 39 (on the left side in FIG. 8), a support member clamping surface 40 is formed for pressing the flat outer surface flat portion 35a of the support member 35 toward the substrate back case 31. Further, on this surface, a bay-like region that is lowered downward in the figure from the outer end to the right is provided so that the flat outer surface portion 35a of the support member 35 can be fitted and water can be prevented from entering. It has a function as an intrusion prevention bank. Since the width of the support member 35 is smaller than the width of the substrate upper surface case 36, the remaining area that is the difference in width does not bother to provide a region above the bay to prevent water from entering.
Further, both ends of the support member sandwiching surface 40 that are separated from each other in the front-rear direction are provided with water intrusion prevention dikes, so-called flush flanges 40a are provided, and a substrate rear case fixing hole Cb is provided. .

Next, the procedure for assembling the electrical product case 13 will be described with reference to FIGS.
First, the substrate back case 31 is turned over and placed on the work table with the top side facing down.
Next, the seal member 32 is assembled around the substrate 14 by aligning the position guide 33 with the electric component arrangement surface (substrate upper surface) facing upward. In this state, the substrate rear case 31 is assembled. As a result, the seal member 32 closes the gap between the peripheral edge of the substrate 14 and the inner surface of the substrate back case 31, so that dust and the like can be prevented from entering the circuit pattern side where the conductive portion is exposed.

  Next, the holes Bb for fixing the substrate back case 31 at the two ends of the substrate and the holes Ba for fixing the substrate of the substrate back case 31 are aligned and fixed with screws. A part of the substrate is made conductive around the screw fixing portion, and the product housing is grounded (grounded) to the substrate rear case 31. In addition to this, the lead wire is used for grounding.

Next, the support member 35 and the fastener 30 are inserted through the board fixing hole Db provided in the inward plane portion 35b of the support member 35 and the support member fixing holes 15a and 15b on the two module surfaces on the board. And fix with screws.
Next, two holes Ab for fixing the back surface case of the substrate rear case 35a of the flat portion outward flat surface portion 35a at the other end of the support member 35 are aligned with the support member fixing holes Aa of the flange surface A of the substrate back surface case 31 with screws. Fix it. Therefore, the flat outer surface flat portion 35a and the flange surface A come into contact with each other.

  Thus, a semi-assembled product (13x) including the substrate back case 31, the substrate 14, the support member 35, and the seal member 32 is completed. At this time, the seal member 32 is sandwiched between the substrate 14 and the substrate rear case 31 and is fixed between them by fixing the flange surfaces A and B with screws. However, the seal member 32 can be removed by removing the screw.

  In the following, as shown in FIG. 2, the substrate upper surface case 36 is assembled in advance to the partition plate 6 of the outdoor unit 1 with the opening side facing up. In this state, the semi-assembled product 13x and the substrate upper surface case 36 are assembled along the insertion guide 34 of the seal member 32 with the electric component disposition surface (substrate upper surface) facing downward.

  When assembling the semi-assembled product 13x and the substrate upper surface case 36, the insertion guide 34 of the seal member 32 is positioned inside the side plates 37 and 38 of the substrate upper surface case 36 and covered along the vertical direction (longitudinal direction). The side plates 37 and 38 are positioned on the side plate of the substrate back case 31. Then, it is incorporated until the insertion guide 34 comes into contact with the bottom plate of the substrate upper surface case 36 or the side plates 37 and 38 come into contact with the top surface of the substrate rear case 31 (see FIGS. 9, 11 and the like).

The extension flange 40a of the substrate upper surface case 36 and the flat outer surface flat portion 35a of the support member 35 are brought into surface contact, and the substrate rear case fixing hole Cb of the extension flange 40a and the substrate upper surface case fixing hole Ca of the substrate rear case 31 are provided. And the electrical case 13 is completed by fixing with screws. Accordingly, the flat outer surface flat portion 35 a of the support member 35 is sandwiched between both flat surfaces of the flange surface A of the substrate back surface case 31 and the support member holding surface 40 of the substrate upper surface case 36.
Alternatively, although different from the above method, there is also a method of fixing the electrical product case 13 to the partition plate 6 after assembling the semi-assembled product 13x and the substrate upper surface case 36 in advance to complete the electrical product case 13. Also in this case, the holes are aligned and fixed as in the case of the assembly described above.

9 to 11 show the assembled appearance of the electrical component case 13. As shown in FIG. 9, the upper surface of the electrical component case 13 is closed by a substrate rear case 31, and the most radiating fin portion 35d of the illustrated left side support member is exposed to the outside. Although the exposed portion is on the left side in the drawing, it is also provided on the lower surface. Alternatively, only one of them can be used.
Further, a yoroid-shaped window 37a is provided on the front side surface of the substrate upper surface case 36. An opening 39 is formed on the right side, and the electrical product is exposed downward in the right half as can be seen in FIGS. The air in the machine room 8 of the outdoor unit 1 and the air in the electrical component case 13 can be ventilated to the blower chamber 7.

  In the electrical product case 13 mounted on the outdoor unit 1, the yoroid-shaped window 37a is opened to the blower chamber 7 side where the blower 4 is located, and the large opening portion where the electrical product is exposed is a nonflammable partition plate such as a steel plate. The machine room 8 defined by 6 opens. Therefore, the large space combining the electrical case 13 and the machine room 8 and the air blowing chamber 7 communicate with each other, and ventilation can be performed with low resistance through the large opening. In order to do this, the size of the bottom plate of the substrate upper surface case 36 can be fixed to the partition plate 6, and all the portions exposed to the blower chamber 7 are all exposed to the upper surface of the substrate in order to prevent water droplets from entering the electrical component case 13. A size that can be covered with the case 36 is sufficient. Therefore, the board upper surface case 36 can be about half the size of the electrical component case 13. At this time, it is considered that the peripheral wall of the electrical component case 13 is shared with the peripheral wall of the machine room 8.

  Thus, the size of the bottom plate of the substrate upper surface case 36 is about half of the size of the electrical product case 13 and the opening portion is enlarged so that ventilation can be performed with low resistance. It is because it supported from above. On the other hand, if the substrate 14 is below as shown in FIG. 16B, the size that can be opened is limited to the upper and lower dimensions (thickness) of the electrical component case 13 at most. In addition, the vertical dimension (thickness) of the electrical product case 13 is not necessarily the dominant resistance, and the gap between the right side surface of the electrical product case 13 and the right side surface of the outdoor unit 1 may be the dominant resistance. Conceivable. This is because these surfaces are very close, as can be seen with reference to FIGS.

  When the blower 4 is operated, the heated air in the electrical component case 13 is forcibly sucked out of the yoroid-shaped window 37a into the blower chamber 7 by the negative pressure action of the blower 4. Further, the air in the machine room 8 enters through the opening 39 and is similarly sucked out from the yoroid-shaped window 37a to the blower room 7.

Next, the operation of the support member 35 will be described with reference to the cross-sectional view of FIG. 12 and the enlarged view of FIG.
The support member 35 is fixed in a bridging state between the substrate 14 and the substrate rear case 31, and both contact points of the fixing portion are flat and are in close contact with each other. Since the board | substrate 14 and the supporting member 35 are supported by 2 surfaces of the flange surfaces A and B, it has a structure where a center part is easy to bend | deviate by dead weight. Also, deformation due to heat may occur. Here, the inward plane portion 35b presses the substrate 14 toward the substrate rear case 31 in the vicinity of the center portion where the inner plane portion 35b is easily bent and easily deformed. Further, the inclined surface 35c of the support member 35 has an elastic force, which is advantageous as a configuration for supporting the substrate 14.

  The support member 35 has two planes, a plane portion outer plane portion 35a and an inner plane portion 35b. The plane portion outer plane portion 35a is formed by the flange surface A of the substrate back case 31 and the substrate upper case 36. It is sandwiched between both planes with the support member clamping surface 40. Therefore, even if the flat portion outward flat surface portion 35a exposed as the outer shape of the electrical product case 13 receives a physical force, the physical force is absorbed and dissipated by the sandwiched both surfaces, and the electrical product case 13 has an inside. Is difficult to communicate. That is, it is difficult for force to be transmitted to the inward plane portion 35b and the inverter module 15 connected thereto.

On the other hand, the heat transmitted from the inverter module 15 or the like is transmitted to both planes sandwiching the plane by the plane portion outward plane portion 35a, and can be radiated to the case. Therefore, heat can be radiated without necessarily providing the support member 35 with heat radiating fins.
In addition, the intrusion of water can be prevented by the flat contact with the water intrusion prevention bank (see the substrate upper surface case in FIG. 10) at the contact portion of the support member 35 with the substrate rear case 31 at the electrical case exit. Further, the support member 35 is made of a metal having excellent heat conduction, and the heat radiating fin portions 35d can be exposed to the side and the lower surface outside the case.

  Further, in the present embodiment, the position of the smoothing capacitors 18 and 19 having the highest height among the electrical components is arranged more than the position of the inverter module 15 or the diode module 16 from the center of the substrate 14 (see FIG. 5), the height dimension of the substrate upper surface case 36 on the support member 35 side could be reduced to a position close to the side surface height of the substrate rear case 31. That is, the board upper surface case 36 can be made thin at a position around the left terminal row of the inverter module 15 where the smoothing capacitors 18 and 19 are not present (area on the side of the board). This portion can be stepped or sloped.

  By making the board upper surface case 36 into a step shape, the electrical product case 13 and the blower 4 can be brought close to each other, and these can be arranged close to each other. Since they may come into contact with each other as close as possible, the electrical case 13 is arranged so as to face the blower 4 in a positional relationship that does not come into contact. As described above, since the relationship between the electrical component case 13 and the blower 4 is improved, the outdoor unit 1 can be downsized.

  Further, the support member 35 is pulled out from the inverter module 15 or the diode module 16, and a plurality of heat radiation fins 35d are disposed downward in the stepped portion, or the heat radiation fins 35d are disposed in the lateral direction. A plurality of sheets can be arranged. If a sufficient heat transfer area can be secured on either the lateral radiating fins or the lower radiating fins, it is not necessary to provide them on both sides, but if they are provided on both sides, a sufficient electric heating area can be secured. .

In addition, it is thought that this stepped portion is in a so-called turbulent state where the air flow is disturbed. Therefore, by disposing the electrical product case 13 so as to face the blower 4, it is possible to enhance the heat dissipation effect using turbulent flow. The closer these are, the higher the amount of air available for heat dissipation.
Further, since the support member 35 is bridged by utilizing a lower space of a small part such as a bootstrap circuit, a wide heat radiation space can be obtained, and the substrate 14 can be reduced in size.

  Next, another embodiment of the shape of the support member will be described with reference to the cross-sectional views of FIGS. The figure shows a cross section of a portion corresponding to FIG. The support member 43 is configured to have a crank-shaped cross section, and includes a substrate rear case fixing flat portion 43a at one end and a substrate fixing flat portion 43b at the other end. Since the horizontal width of the flat portion 43a is wider than that of the outer flat portion 35a, and more heat radiation fins 43d are disposed on the widened lower surface side, the heat radiation effect can be enhanced. In addition, since the cross section has no inclined portion, the support member 43 can be easily manufactured. Other effects can be obtained in the same manner as the embodiment of FIG. Other forms of the support member include a Z-shaped cross section and a straight section (a simple plate as the support member). However, the support member may have a shape that can bridge between the substrate 14 and the substrate rear case 31. For example, the present invention is not limited to the above form. When the support member is a simple plate, it is necessary to adjust the height dimensions of the substrate upper case and the substrate rear case.

External perspective view of outdoor unit The perspective view which shows the internal structure of an outdoor unit, and the removal state of an electrical component case Structure plan of outdoor unit Outdoor unit structure front view Electrical component placement side plan view Side view of FIG. The perspective view which shows the internal structure of an electrical component arrangement | positioning surface and a board | substrate back surface case The perspective view which shows the assembly | attachment state of the whole electrical goods case External perspective view after assembly of the entire electrical case Bottom view after assembly of the entire electrical case Side view of FIG. PP sectional view of FIG. Enlarged sectional view of the vicinity of the substrate fixing support member Sectional drawing using other embodiment of supporting member for substrate fixation FIG. 14 is an enlarged sectional view in the vicinity of the substrate fixing support member. Schematic diagram of a conventional outdoor unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Outdoor unit 2 ... Housing | casing 3 ... Grill 4 ... Blower 5 ... Heat exchanger 5
6 ... Partition plate 7 ... Blower chamber 8 ... Machine chamber 9 ... Compressor 13 ... Electrical case 14 ... Substrate 15 ... Inverter module 15a ... For supporting member fixing Hole 16 ... Diode module 16a ... Support member fixing hole 18 ... Smoothing capacitor 19 ... Smoothing capacitor 21 ... Hybrid IC
24 ... Switching transformer 27 ... Noise filter coil 30 ... Fastener 31 ... Substrate back case 32 ... Seal member 35 ... Support member 36 ... Substrate upper case 37a ... Yoloid window 39 ... opening 40 ... support member clamping surface Aa ... support member fixing hole Ab ... substrate rear case fixing hole Ba ... substrate fixing hole Bb ... substrate Back case fixing hole Ca ... Board upper surface case fixing hole Cb ... Substrate rear case fixing hole Db ... Support member fixing hole

Claims (12)

In an outdoor unit for an air conditioner provided with an electrical component case arranged over a partition plate that partitions a blower chamber provided with a blower and a machine room provided with a compressor,
The electrical case is
A board back case,
A substrate on which one side is fixed so that the substrate rear surface is opposed to the substrate rear case, and an electrical component such as an inverter module is laid in the region on the other side of the substrate upper surface, and
A support member fixed to the substrate back case, and supports the other end side of the substrate by supporting a portion where the inverter module is disposed so as to bridge the substrate back case and the substrate. A supporting member to be fixed;
A substrate upper surface case covering the upper surface side of the substrate;
The electrical case is arranged so that the thickness dimension of the upper surface side of the substrate is smaller than the thickness dimension closer to the one side, and the portion with the reduced thickness dimension faces the blower. An air conditioner outdoor unit fixed to the partition plate. In claim 1,
An air conditioner characterized in that a smoothing capacitor as the electric component is arranged on the one side by arranging the electric component necessary for the input of the inverter module on the other side of the inverter module. Aircraft outdoor unit. In claim 1,
The outdoor unit for an air conditioner, wherein the support member has two planes parallel to each other and one slope inclined with respect to these planes. In claim 1,
The outdoor unit for an air conditioner, wherein the support member has two planes parallel to each other and one plane perpendicular to the planes. In claim 1,
An outdoor unit for an air conditioner, wherein the substrate is supported and fixed by the support member by screwing from the substrate upper case side. In claim 5,
While fixing the metal thin plate provided with screw holes to the substrate, the thin plate is disposed between the substrate and the inverter module,
Between the support member and the thin plate, the inverter module with a hole for screw penetration is disposed,
An outdoor unit for an air conditioner, wherein the substrate and the support member are fixed by screwing the thin plate and the support member. In claim 1,
An outdoor unit for an air conditioner, wherein the support member is made of metal, and heat radiating fins are provided on the support member exposed on the outer surface of the electrical component case. In claim 1,
An outdoor unit for an air conditioner, characterized in that the shape of the upper surface case of the substrate on the other side is stepped, and heat radiation fins are provided on the flat portion of the support member exposed on the outer surface of the electrical component case. In claim 1,
While providing an opening in the electrical product case facing the machine room, providing a yoroid-shaped window on the substrate upper surface case,
An outdoor unit for an air conditioner, wherein the machine room and the blower room are communicated. In claim 1,
The electrical component includes a diode module,
The outdoor unit for an air conditioner, wherein the support supports and fixes the other end of the substrate by supporting a portion where the inverter module and the diode module are disposed. In claim 1,
The substrate back case has a flange surface parallel to the substrate for attaching the support member,
The support member has a flat portion parallel to the substrate for attaching to the back case,
The substrate upper surface case has a support member clamping surface for pressing the flat portion in the direction of the rear case,
The outdoor unit for an air conditioner, wherein the planar portion of the support member is sandwiched between the flange surface of the substrate back case and the support member clamping surface of the substrate top case. In claim 1,
An outdoor unit for an air conditioner, wherein a sealing member is disposed between the substrate and the substrate rear case.

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