KR100747946B1 - Outdoor unit for air conditioner - Google Patents

Abstract

The present invention has been made to solve the problem, and an object thereof is to provide a small outdoor unit for an air conditioner. In addition, it is an object of the present invention to provide an outdoor unit for a miniaturized air conditioner in which an electric component is hardly subjected to a physical load from the outside.

The electrical appliance case includes a substrate rear case, a substrate on which one side is fixed so that the substrate back face is opposite to the substrate back case, and an electrical component such as an inverter module is placed on the other side of the upper surface of the substrate, and the substrate back case It is a fixed support member, It has a support member which supports and fixes the other end side of a board | substrate by supporting the part in which the inverter module is arrange | positioned so that a board | substrate back case and a board | substrate may be interposed, and the board | substrate upper surface case which covers the upper surface side of a board | substrate, An outdoor unit for an air conditioner in which an electrical appliance case is fixed to a partition plate so that the thickness of the other side of the upper case is smaller than the thickness of the vicinity of one side, and the part of the reduced thickness is faced to the blower.

Outdoor Unit, Housing, Grill, Blower, Heat Exchanger

Description

Outdoor unit for air conditioner {OUTDOOR UNIT FOR AIR CONDITIONER}

1 is an external perspective view of an outdoor unit;

2 is a perspective view showing an internal structure of an outdoor unit and a removal state of an electrical appliance case;

3 is a structural plan view of an outdoor unit.

4 is a structural front view of an outdoor unit.

5 is an electrical component arrangement surface side plan view.

Figure 6 is a side view of Figure 5;

Fig. 7 is a perspective view showing the inner structure of the electrical component arrangement surface and the substrate back case;

8 is a perspective view showing an assembled state of an entire electrical appliance case;

9 is an external appearance perspective view of the entire electrical appliance case after completion of assembly.

Fig. 10 is a bottom view of the entire electrical appliance case after completion of assembly;

Figure 11 is a side view of Figure 10;

Fig. 12 is a sectional view taken along the line P-P in Fig. 10;

Fig. 13 is an enlarged cross sectional view of the vicinity of a support member for fixing a substrate.

Fig. 14 is a sectional view using another embodiment of the substrate fixing support member.

Fig. 15 is an enlarged sectional view of the vicinity of the supporting member for fixing a substrate of Fig. 14;

16 is a schematic diagram of a conventional outdoor unit.

<Explanation of symbols for the main parts of the drawings>

1: outdoor unit

2: housing

3: grill

4: blower

5: heat exchanger

6: partition plate

7: blower room

8: machine room

9: compressor

13: electrical appliance case

14: substrate

15: inverter module

15a: hole for fixing the support member

16: diode module

16a: hole for fixing the support member

18, 19: smoothing capacitor

21: hybrid IC

24: switching transformer

27: coil for noise filter

30: fixed member

31: substrate back case

32: sealing member

35 support member

36: substrate top case

37a: Shutter Window

39: opening

40: support member fitting support surface

Aa, Db: hole for fixing the support member

Ab, Bb, Cb: Holes for fixing the substrate back case

Ba: hole for fixing the board

Ca: Hole for fixing case on upper surface of substrate

[Document 1] Japanese Unexamined Patent Publication No. 9-060928

[Document 2] Japanese Unexamined Patent Application Publication No. 11-230583

[Document 3] Japanese Unexamined Patent Publication No. 06-147555

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

A typical split air conditioner consists of an indoor unit and an outdoor unit. The indoor unit is equipped with a minimum apparatus for sending a predetermined air conditioner, and the outdoor unit is equipped with a heat exchanger, a blower, a compressor for sending a refrigerant, and an electrical appliance box (electrical case) for operation control.

Since the inverter module disposed in the electrical box is particularly large in heat generation, it is important to dissipate the module, and heat dissipation is also important in other components such as a rectifying diode that converts AC power into DC. As a heat radiation measure, attaching a heat radiation fin or improving a heat radiation effect through the wind is widely performed.

As a prior art example of the electrical appliance box in which such a temperature rise prevention measure was performed, patent document 1 is mentioned. In the technique described in Patent Literature 1, the back of the substrate on which the circuit pattern is arranged is on the upper side, and the upper surface of the substrate on which the various electrical components are arranged is on the lower side. Was posted as. Moreover, this board | substrate was assembled to the resin mounting support body, this was accommodated in the case body (board | substrate upper case), and it covered with the cover body (board | substrate back case), and comprised as an electrical component box. The reinforcement ladder and the board | substrate support upward support pillar part were integrally provided in the mounting support body made of resin.

Moreover, the radiator was fixed to the longitudinally arranged electrical control component surface with the screw from the horizontal direction, and the installation support body also provided the longitudinal opening part in the corresponding position in order to implement such a structure. That is, the vertical opening part was formed by providing the part which stood up on the side of the mounting support body, and also provided the clearance sealing, and provided the heat radiator with the screw on the surface of the vertically arranged electrical control component via the vertical opening part of a frame. This radiator faced the heat exchange fan room in which the refrigerant | cooler heat exchanger blower was provided.

[Patent Document 1] Japanese Patent Application Laid-Open No. 9-060928

[Patent Document 2] Japanese Patent Application Laid-Open No. 11-230583

[Patent Document 3] Japanese Unexamined Patent Publication No. 06-147555

Fig. 16 is a schematic view of the front view of the outdoor unit as seen from the same direction as Fig. 4, showing the configuration of the above prior art. Here, reference numeral 4 denotes a blower, 13 denotes an electrical appliance case, 14 denotes a substrate, and broken lines denote electrical components. In addition to the heat exchanger or the compressor, the outdoor unit 1 must be arranged in addition to the size of the outdoor unit 1 mainly in the transverse direction in the drawing, the size of the blower 4 and the size of the electrical appliance case 13 and their positions. The relationship is dominant. While the size of the blower 4 is dominant in the longitudinal direction in the figure, the thickness (up and down dimension) of the electrical appliance case 13 is also related. The thickness of the electrical appliance case 13 is dominated by the height (dimensions in the direction perpendicular to the substrate) from the substrate 14 among electrical components provided on the substrate.

In the drawing, the blower 4 and the electrical appliance case 13 are exaggerated and placed close to each other as if they are not in contact. However, in order to obtain a product, it is necessary to maintain a safe distance that is not determined and contacted. Therefore, in such an electrical appliance case 13, there is a limit in shortening the distance between the blower 4 and the electrical appliance case 13, and furthermore, there is a limitation in miniaturization of the outdoor unit 1. In addition, as shown in (a), when the inverter module is vertically installed on the substrate 14 and heat radiation fins are to be provided thereon, the heat dissipation fins are supported in the terminals (column 1) of the inverter module.

In this case, when the heat dissipation fins exposed from the housing of the outdoor unit 1 and the electrical appliance case 13 come into contact with each other at the time of assembly, the load generated by the contact is also caught by the terminals of the inverter module. Loads in the lateral direction (vertical direction with the inverter module or in parallel with the substrate) can also be received by the mounting support, but loads in the longitudinal direction (parallel with the inverter module or in the direction perpendicular to the board) must be received only at the terminals of the inverter module. do. This is not necessarily preferable in the product.

The present invention has been made to solve the above problems, and an object thereof is to provide a small outdoor unit for an air conditioner. In addition, it is an object of the present invention to provide an outdoor unit for a miniaturized air conditioner in which an electric component is hardly subjected to a physical load from the outside.

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

An outdoor unit for an air conditioner having a blower chamber in which a blower is disposed and an electrical appliance case arranged on a partition plate partitioning a machine compartment in which a compressor is disposed, the electrical appliance case comprising a substrate back case and the substrate back case. And a substrate having one side fixed to the substrate back side facing each other, and having electrical components such as an inverter module laid on the other side region of the substrate upper surface laid thereon, and a supporting member fixed to the substrate back case. The support member which supports and fixes the other end side of the said board | substrate by supporting the part in which the said inverter module is arrange | positioned so that the said board | substrate has a board top case which covers the upper surface side of the said board | substrate, and the said other of the said board | substrate top case The part of the thickness dimension which made side thickness thickness smaller than the thickness dimension of the said one side side, and made small An outdoor unit for an air conditioner, wherein the electrical appliance case is fixed to the partition plate so as to face the blower.

In addition to the above-described configuration, by arranging the electrical components required for input of the inverter module on the other side of the inverter module, the smoothing capacitor as the electrical component may be arranged on the one side. have.

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

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

Moreover, in addition to the above structure, the structure which performs support fixing of the said board | substrate by the said support member by the screw fixing from the said board | substrate upper surface case side can also be employ | adopted.

In addition to the above-described configuration, the thin metal plate provided with the screw hole is fixed to the substrate, and the thin plate is disposed between the substrate and the inverter module, and the screw penetrates between the support member and the thin plate. The structure which fixes the said board | substrate and the said support member may be employ | adopted by arrange | positioning the said inverter module with the hole perforated, and screwing the said thin plate and the said support member.

In addition to the above configuration, the support member may be made of metal and a heat dissipation fin may be provided to the support member exposed on the outer surface of the electrical appliance case.

In addition to the above-described configuration, the heat dissipation fin is provided in a flat portion of the support member exposed to the outer surface of the electrical appliance case, with the shape of the substrate upper surface case on the other side being stepped. It is also possible to employ.

In addition to the above-described configuration, an opening may be provided in the electrical appliance case facing the machine room, and a shutter-type window may be provided in the upper case of the substrate to communicate the machine room with the ventilation chamber. It may be.

In addition to the above configuration, the electrical component includes a diode module, and the support member supports and fixes the other end side of the substrate by supporting the portion where the inverter module and the diode module are disposed. It is also possible to employ.

Further, in addition to the above configuration, the substrate back case has a flange surface parallel to the substrate for installing the support member, and the support member has a flat portion parallel to the substrate for installation on the back case. And the substrate upper case has a support member fitting support surface for pressing the flat portion in the rear case direction, wherein the flat portion of the support member is the flange surface of the substrate rear case and the support of the substrate upper case. It is also possible to adopt a configuration to be fitted to the member fitting support surface.

Moreover, in addition to the above structure, the structure which arrange | positions a sealing member between the said board | substrate and the said board | substrate back case can also be employ | adopted.

Embodiments of the present invention will be described below with reference to FIGS.

1 is an external perspective view of an outdoor unit, FIG. 2 is a perspective view showing an internal structure of an outdoor unit and an electrical appliance case removed, FIG. 3 is a structural plan view of an outdoor unit, FIG. 4 is a structural front view of an outdoor unit, and FIG. 5 Fig. 6 is a side plan view of the electric component arrangement surface side of the substrate, Fig. 6 is a side view of Fig. 5 with the electrical components arranged on the substrate, Fig. 7 is a perspective view showing an internal structure of the electric component arrangement surface and the substrate back case of the substrate for electrical appliances. Fig. 9 is a perspective view showing the assembled state of the entire electrical appliance case, Fig. 9 is an external perspective view of the entire electrical appliance case after assembly is completed, Fig. 10 is a bottom view after the assembly of the entire electrical appliance case is completed, and Fig. 11 is a complete assembly of the electrical appliance case. Fig. 12 is a sectional view taken along the line PP of Fig. 10 after completion of the assembly of the electrical appliance case, and Fig. 13 is an enlarged sectional view of the vicinity of the supporting member for fixing the substrate.

First, the outdoor unit will be described with reference to Figs.

Reference numeral 1 is an outdoor unit and is covered with a housing 2 (ceiling surface 2a, right side surface 2b, and the like). In the front side, the grill 3 for sending out the wind which passed the heat exchanger 5 of an air conditioner to the outside is provided in the front side. The blower 4 is arrange | positioned in the inner direction of the position which opposes the grill 3, and the heat exchanger 5 of the cross fin pipe type is arrange | positioned inside. The blower 4 is located in front of the heat exchanger 5, and the grill 3 is located in front of the heat exchanger 5. The heat exchanger 5 is arrange | positioned in substantially L shape from the side surface of the outdoor unit 1 to the back surface, and secures a large area as much as possible, and raises heat exchange ability. The blower 4 is also used as large diameter as possible. In addition, as a general rule, in the description of the entire drawing, orientations such as up, down, left, right, front and rear (front inside) and the like are shown in the coordinate axis of FIG.

There is a partition plate 6 near the right side in the left and right directions to partition the heat exchange blower chamber 7 and the machine chamber 8. In the heat exchange blower chamber 7, the blower 4 and the heat exchanger 5 are arrange | positioned as mentioned above. In the machine room 8, a compressor 9, a refrigerant adjusting tank 10, refrigerant conveying 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 through the circuit. For that purpose, the capacity and size of the electrical appliance are usually increased, and the electrical appliance case 13 containing the same is also enlarged. Accordingly, the electrical appliance case 13 is mounted flat in a limited space above the blower 4 and the compressor 9. In other words, the electrical appliance case 13 is a flat box.

The mounting position of the electrical appliance case 13 is the uppermost stage close to the ceiling surface plate 2a of the outdoor unit 1. The substrate upper surface case 36 is fixed above the partition plate 6 over the ventilation chamber 7 and the machine chamber 8. Thus, the electrical appliance case 13 is fixed to the partition plate 6. Although the electrical appliance case 13 is mentioned later, FIG. 2 has shown the state which removed the semi-assembled product 13x of the board | substrate and the board | substrate back case, and the board | substrate upper case 36. As shown in FIG. The electrical appliance case 13 is assembled by providing the semi-assembled product 13x which complete | finished various wiring etc. in the board | substrate upper case 36 fixed to the partition plate 6.

Next, the substrate will be described with reference to FIGS. 5 and 6.

Reference numeral 14 denotes a substrate, and FIG. 5 shows an electrical component arrangement surface (substrate upper surface), and is a view looking upward from below when the electrical appliance case 13 is mounted on the outdoor unit 1. The board | substrate 14 is equipped with the electrical circuit pattern (copper foil wiring pattern) which wired with the copper foil etc. previously in the board | substrate, arrange | positioning various electrical components on the electrical component arrangement surface which is an upper surface of a board | substrate. The back surface of the substrate is colored, for example, in green or the like, and is a surface for soldering a terminal (foot of an electrical component) of the electrical component. In addition, although the so-called single-sided board which mainly performed the said copper foil wiring pattern only on the back surface is demonstrated here, you may implement a copper foil wiring pattern over a board | substrate upper surface (plural layers).

Reference numeral 15 is an inverter module, and is provided on the substrate 14 in parallel with the surface. In the module, a semiconductor switching element for supplying rotational power, i.e., power, and an input / output driving circuit thereof, etc., are built into the motor circuit for the compressor 9, and thus the heat generation amount is the greatest. Thus, the inverter module 15 must actively cool. Further, the terminal strings are arranged in a claw type on both sides of the left and right sides. The terminal column on the left side is mainly an input relationship, and the terminal terminal on the right side is an output relationship mainly, and the diode 15b and the capacitor 15c are arrange | positioned at this input terminal column side.

Reference numeral 15b denotes a small component diode, and 15c denotes a small component capacitor, and is disposed between the substrate ends on the near side of the inverter module 15, that is, in the region on the side. For example, by setting two components of reference numerals 15b and 15c as a set, three sets of bootstrap circuits are operated to operate the upper arm switching element in the inverter module 15. Moreover, the space above these small parts (it becomes downward when the electrical appliance case 13 is mounted in the outdoor unit 1) can be utilized as an arrangement position of the support member 35 mentioned later.

With this configuration, the inverter module 15 having a high heat generation can be disposed near 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 terminal insertion are drilled. Reference numeral 16 denotes a diode module for rectifying, which is provided on the substrate 14 in parallel with the inverter module 15. The module 16 has a built-in double-voltage rectifier circuit for converting commercial AC power into direct current, and this module 16 is the next-largest component in the inverter module 15. Thus, the module 16 must also be actively cooled.

Reference numerals 18 and 19 denote smoothing capacitors. The voltage waveforms rectified by the diode module 16 are used as flat DC waveforms, and are installed in the vicinity of the diode module 16. The smoothing capacitors 18 and 19 have the largest height dimension among the electrical components installed in the board | substrate 14, by which the height dimension of an electrical appliance case is restrict | limited.

The height (thickness) of the electrical appliance case 13 is limited by the smoothing capacitors 18 and 19 having a large size in the vertical direction of the substrate 14. If it is flat components, such as the inverter module 15 and the diode module 16, even if the thickness of the electrical appliance case 13 is made small, there is no problem. Therefore, if the inverter module 15 etc. are arrange | positioned in the area | region of the side of the board | substrate 14, and the smoothing capacitors 18 and 19 are arrange | positioned inside the board | substrate 14 rather than the position arrange | positioned in this way, the board | substrate 14 of The dimension of the side area | region, ie, the edge part of the electrical appliance case 13 can be made thin. Reference numeral 20 denotes a power relay, which operates when there is a command such as start or stop from the indoor unit. The command is transmitted from the hybrid IC 21. Since the hybrid IC 21 receives a signal from the indoor unit or controls the exchange with the components in the substrate 14, the hybrid IC 21 is disposed approximately at the center of the circuit configuration, which is convenient for the circuit. Reference numeral 22 is a power supply 5V for the hybrid IC 21, and drives this.

Reference numeral 27 denotes a noise filter coil that constitutes a main part of the noise filter circuit, and prevents noise from the power supply circuit including the inverter module 15 or the like from going out. Thereby, malfunction of peripheral products, such as an electrical component on a board | substrate 14, a related apparatus, and an air conditioner, is prevented. 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 the switching IC 25 located nearby.

Reference numeral 26 denotes a smoothing capacitor for flattening a commercial AC power supply to make a DC voltage waveform. The smoothing capacitor 26 is arrange | positioned near this in order to send the generated DC voltage to the switching IC 25. FIG. Reference numeral 28 is a current detector for detecting the maximum limiting current of the air conditioner and the like. Reference numeral 29 is a communication coil, and generates a signal voltage for transmitting and receiving the operating conditions of the indoor unit and the outdoor unit 1. Reference numeral 30 is a fixing member, a thin plate covering two modules, and is fixed to the substrate 14.

Next, the structure of the electrical appliance case 13 which is a main member is demonstrated using FIG.7, FIG.8. Fig. 7 is a view of the view from below and Fig. 8 is a view of the view from above. Reference numeral 31 is a metal substrate back case. The left side, which is one end, has a flange face A bent outward in parallel with the substrate 14 at the lower end of the side plate of the left side plate, and the flange face A has a screw insertion hole for fixing with the supporting member 35. Two places of (Aa) and two screw insertion holes Ca for fixing with the board | substrate upper surface case 36 outside the two holes Aa are provided.

On the right side, which is the other end, a small portion which is a part of the front (front) plate and the inner (rear side) plate has each flange surface B bent inward in parallel with the substrate 14 at the lower end of the side plate, and each plan The ground B is provided with one screw insertion hole Ba for fixing with the substrate 14.

Each part of one end of the board | substrate 14 is equipped with the board | substrate back case fixing hole Bb. Most of the electrical components provided on the board 14 pass the bottom terminal to the back of the board, and are mounted on the board upper surface. 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. Therefore, since solder parts of various electrical components arranged on the substrate 14 are positioned between the flange face B and the ceiling surface plate of the substrate back case 31, a sufficient distance from which they do not have to be secured must be ensured.

The inverter module 15 is provided with two fixing through holes 15a for fixing the support member 35 to the substrate 14, and the same fixing through hole 15b is provided at the diode module 16. . The fixing member 30 (refer FIG. 5 etc.) is provided with the screw hole for accommodating the screw which penetrated the said fixing through-hole 15a, 15b.

The support member 35 has an outer planar part 35a, an inner planar part 35b, and an inclined surface part 35c between these planar parts. The outer flat portion 35a has two holes Ab for fixing with the substrate back case 31, and the inner flat portion 35b has holes Db for fixing with the fixing member 30 of the substrate 14. ) Are provided in three places. The support member 35 is made of aluminum having excellent thermal conductivity, and a plurality of heat dissipation fins 35d are vertically formed integrally with the uppermost end and the lower surface side of the outer flat portion 35a. Since the support member 35 is made of metal, it has a function of dissipating heat generated by two modules, and the heat dissipation function is further enhanced by providing a plurality of heat dissipation fins.

The supporting member 35 is fixed to the fixing member 30, that is, the substrate 14 by screwing. Two modules are positioned between the support member 35 and the fixed member 30. If there is no fixing member 30 and the supporting member 35 is installed in two modules, the load is applied to the terminal portions and the soldering portions of the two modules, which is not preferable. In severe cases, the foot may be bent or the solder may be peeled off, which may result in poor contact. This problem is solved by having one thin sheet.

When the board | substrate 14 and the support member 35 which were fixed in this way are used as a unit, this unit will be provided in the board | substrate back case 31. As shown in FIG. In addition, the support member 35 is fixed to the substrate back case 31, and may be regarded as a medium for fixing and fixing the substrate 14 and the substrate back case 31.

The support member 35 also has a function of supporting and supporting one side of the substrate 14 to the substrate rear case 31. The inclined surface portion 35c is used to sufficiently exhibit the supporting function by the elastic force. The two modules are in close proximity to each other in order to simplify the heat dissipation mechanism and to enhance the heat dissipation function of the electrical appliance case 13 as a whole.

Reference numeral 32 is a sealing member made of resin and is disposed around the substrate 14. Although the electrical appliance case 13 is completed even without this component, sealing of the clearance gap between the board | substrate 14 and the board | substrate back case 31, and the contact prevention of the electrical component arrange | positioned at the board | substrate 14 and the board | substrate upper case 36 are carried out. It is a part which is necessary from the ease of assembling property.

The sealing member 32 is provided with the plurality of position guides 33 of the board | substrate 14 which protruded in the inner periphery, and the positioning insertion guide 34 for installing the board | substrate upper case 36 is integrally provided. . The height of the position guide 33 in the vertical direction is such that the substrate 14 and the substrate back case 31 do not approach more than this height, and therefore, it is necessary to set the height of the position guide 33 so that they do not touch. The right side of the figure is regulated by the flange face B, but the left side is not particularly restricted, so this height setting is important.

Reference numeral 36 is a substrate upper surface case. When the electrical appliance case 13 is mounted in the outdoor unit 1, it is located below, but since it covers the upper surface of the board | substrate 14, it is called a board | substrate upper surface case. The upper surface case 36 of the board | substrate has comprised the half container shape which the part of steel plate lacks. This lacking part is an opening 39 for introducing air mostly, and is exposed to the machine room 8 when the electrical appliance case 13 is mounted in the outdoor unit 1.

There is a side plate 37 in the front-rear direction (front-inner direction), and the air suction shutter-type window 37a is provided in the side plate 37. The air is sucked out of the window into the heat exchange blower chamber 7, and the air in the electrical appliance case 13 is blown by the blower 4 when the electrical appliance case 13 is mounted in the outdoor unit 1. Is aspirated. In addition, although the blower 4 rotates clockwise in FIG. 4, it is considered that water droplets and the like are scattered, but the shutter-type window 37a is opened downward to prevent ingress of water droplets and the like. If necessary, the shutter-type window may not be opened directly below, but may be opened downward in the right side in FIG. However, it is necessary to consider the balance with air aspiration using the negative pressure of the blower.

In addition, the positions of the capacitors 18 and 19 should be installed as close as possible to the two modules described above, but by placing them inside the substrate 14 as much as possible, the end portion 37b reduces the height dimension (thickness) upwards. By thinning.

In this respect, the prior art has not been able to make the upper and lower dimensions of the substrate upper surface case 36 as well as the upper and lower dimensions of the electrical appliance case small and thin in the present embodiment. This is because the inverter module or the like is placed on the end of the substrate, or the upper surface rear surface of the substrate has a configuration opposite to that of the present embodiment (see Fig. 16).

In this embodiment, the arrangement of the module and other electrical components is devised, and the upper and lower dimensions (thickness) of the upper case 36 of the substrate, and further, the upper and lower dimensions (thickness) of the electrical appliance case are made small and thin so as to be stepped. Is a staircase, but can be a slope, etc.).

Specifically, the inverter module 15 was placed face down on the substrate. As the inverter module 15, a terminal foot having a two-row type (dual in line) was adopted. Between the end of the board | substrate and the terminal column on the left side of the inverter module 15, the components 15b and 15c which comprise a drive circuit, such as a bootstrap circuit, are arrange | positioned. By this design, the edge part of the part which faces the ventilation chamber 7 among the electrical appliance cases 13 which hangs over 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 planar rather than stepped. However, as shown in FIG. The range occupied by 13 is large, and it is difficult to enlarge the substrate 14. The design of the adoption and arrangement of the dual in-line components as described above is advantageous in that the size of the entire substrate is not changed. Of course, it is also possible for the terminal to produce the same effect as the dual in-line component by the line-type component and the fixing member 30.

Support member fitting support surface 40 for pressing the planar part outer planar part 35a of the support member 35 to the board | substrate back case 31 at the edge part opposite to the opening part 39 (left side in FIG. 8). To form. In addition, this surface is provided with a mandrel region lowered downward in the drawing from the outer end to the right side in the right direction, and the flat part outer flat part 35a of the support member 35 is fitted to prevent intrusion of water. It has a function as a water intrusion prevention bank. Since the width | variety of the support member 35 is smaller than the width | variety of the board | substrate upper surface case 36, invasion of water is prevented intentionally without providing a wide area in the remaining part which is a difference of width. Further, both end portions deviating in the front-rear direction from the support member fitting support surface 40 are provided with water intrusion prevention dams, and a so-called flat flange 40a is provided to provide a substrate back case fixing hole Cb. .

Next, the assembly procedure of the electrical appliance case 13 will be described based on FIG. 7 and FIG. 8. First, the board | substrate back case 31 is reversed and it is put on a work surface with the ceiling surface side down. Next, the position guide 33 is aligned with the electrical component placement surface (substrate upper surface) facing up, and the sealing member 32 is assembled to the periphery of the substrate 14. In this state, the substrate back case 31 is assembled. As a result, the sealing member 32 closes the gap between the peripheral edge portion of the substrate 14 and the inner surface of the substrate rear case 31, so that dust or the like can be prevented from entering the exposed circuit pattern side of the conductive portion. have.

Next, the two substrate back case 31 fixing holes Bb at the substrate end and the substrate fixing hole Ba of the substrate back case 31 are aligned and fixed with screws. A part of a board | substrate is made into the state which can conduct | operate around this screw fixing part, and the product housing ground (earth) is carried out to the board | substrate back case 31. In addition to this, grounding is performed by lead wires.

Next, the support member 35 and the substrate fixing hole Db provided in the inner planar portion 35b of the supporting member 35 and the supporting member fixing holes 15a and 15b of the two module surfaces on the substrate. The fixing member 30 is fixed with a screw. Next, fixing the support member of the flange surface A of the board | substrate back case 31 with two board | substrate back case fixing holes Ab of the flat part outer side flat part 35a of the other end part of the support member 35 is fixed. Fix it with a screw in accordance with the hole (Aa). Therefore, the planar part outer planar part 35a and the flange surface A come into contact with the surface.

Thereby, the semi-assembled product 13x which comprises the board | substrate back case 31, the board | substrate 14, the support member 35, and the sealing member 32 is completed. At this time, the sealing member 32 is fitted to the board | substrate 14 and the board | substrate back case 31, and is fixed between them by screwing of the flange surfaces A and B parts. However, if the screw is removed, the sealing member 32 can also be removed.

Hereinafter, as shown in FIG. 2, the board | substrate upper surface case 36 is attached to the partition plate 6 of the outdoor unit 1 in advance, facing up at the side which opens. In this state, the semi-assembly 13x and the board | substrate upper surface case 36 are assembled and attached along the insertion guide 34 of the sealing member 32 with an electrical component arrangement surface (board | substrate upper surface) downward.

At the time of assembling and attaching the semi-assembled product 13x and the substrate upper case 36, the insertion guide 34 of the sealing member 32 is positioned inside the side plates 37 and 38 of the upper substrate case 36 so as to move up and down ( And the side plates 37 and 38 are placed on the side plates of the substrate back case 31. Then, when the insertion guide 34 contacts the bottom plate of the substrate upper case 36 or the side plates 37 and 38 contact the ceiling surface of the substrate rear case 31 (see FIGS. 9, 11 and the like). Assemble up to).

The surface flange of the upper substrate case 36 and the flat outer surface 35a of the support member 35 are brought into surface contact with each other so that the substrate rear case fixing hole Cb of the extension flange 40a and the substrate rear surface are contacted. The electrical appliance case 13 is completed by matching the board | substrate upper case case fixing hole Ca of the case 31, and screwing it. Therefore, the planar part outer side planar part 35a of the support member 35 is in both planes of the flange surface A of the board | substrate back case 31, and the support member clamping support surface 40 of the board | substrate upper case 36. Will be fitted. Alternatively, the method of fixing the electrical appliance case 13 to the partition plate 6 after the semi-assembled product 13x and the substrate upper surface case 36 are completed by assembling and completing the electrical appliance case 13 in advance. There is also. Also in this case, the holes are aligned and fixed in the same manner as in the case of the above-mentioned assembly attachment.

9 to 11 show an assembled appearance of the electrical appliance case 13. As shown in FIG. 9, the upper surface of the electrical appliance case 13 is closed by the board | substrate back case 31, and exposes the outermost heat dissipation fin part 35d of the left side support member shown to the outer side. Although the exposed part is left in the figure, it is provided also in the lower surface. Alternatively, either one can be used. Moreover, the shutter type window 37a is provided in the front surface of the board | substrate upper case 36. As shown in FIG. The right side is an opening 39, and as shown in Figs. 10 and 11, the electrical appliances are exposed downward from the right half. Air in the machine room 8 of the outdoor unit 1 and air in the electrical appliance case 13 can be ventilated to the ventilation chamber 7.

In the electrical appliance case 13 mounted in the outdoor unit 1, the shutter-shaped window 37a is opened to the blower chamber 7 in which the blower 4 is located, and the exposed part of the electrical appliance is a steel plate or the like. It is opened to the machine room 8 partitioned by the non-flammable partition plate 6 of the. Therefore, the large space where the electrical appliance case 13 and the machine room 8 were matched, and the ventilation chamber 7 communicate with each other, and the ventilation can be performed with low resistance through a large opening. In order to do this, the size of the bottom plate of the substrate upper surface case 36 can be fixed by the partition plate 6, and in order to prevent the ingress of water droplets into the electrical appliance case 13, It is sufficient that all the exposed portions have a size that can be covered by the substrate upper surface case 36. Therefore, the board | substrate upper case 36 can be made into about half of the size of the electrical appliance case 13. As shown in FIG. At this time, it is judged that the peripheral wall of the electrical appliance case 13 is shared with the peripheral wall of the machine room 8.

In this way, the bottom plate of the upper case 36 of the substrate is about half the size of the electrical appliance case 13, and the opening portion is enlarged to allow ventilation with low resistance. It is based on supporting the board | substrate 14 from the top. On the contrary, when the board | substrate 14 was down like FIG.16 (b), the size which can be opened only makes the upper-lower dimension (thickness) of the electrical appliance case 13 the upper limit. Further, the upper and lower dimensions (thickness) of the electrical appliance case 13 are not limited to the dominant resistance, and the resistance between the right side of the electrical appliance case 13 and the right side of the outdoor unit 1 is the dominant resistance. It is also considered. As can be seen with reference to Figs. 3 and 4, these surfaces are very close.

When the blower 4 is operated, the exothermic air in the electrical appliance case 13 is forced out of the shutter-shaped window 37a into the blower chamber 7 by the action of negative pressure by the blower 4. Moreover, the air of the machine room 8 is also drawn in from the opening part 39 and is similarly drawn out from the shutter-type window 37a to the blowing chamber 7.

Next, the operation of the supporting member 35 will be described in the sectional view of FIG. 12 and the enlarged view of FIG. The supporting member 35 is fixed in an intermediate state between the substrate 14 and the substrate rear case 31, and the contact points of the fixing portions are flat to each other, so that they are in close contact with each other. Since the board | substrate 14 and the support member 35 are supported by the two surfaces of the flange surfaces A and B, the center part has a structure which is easy to bend by self weight etc. In addition, deformation due to heat may also occur. Here, the inner side flat part 35b presses the board | substrate 14 toward the board | substrate back case 31 in the vicinity of the central part which is easy to bend and deform | transform. Moreover, since the inclined surface part 35c of the support member 35 has elastic force, it is advantageous as a structure which supports the board | substrate 14.

In addition, the support member 35 has two planes, the planar part outer planar part 35a and the inner planar part 35b, and the planar part outer planar part 35a has the flange surface A of the board | substrate back case 31. ) And the support member fitting support surface 40 of the substrate upper surface case 36 are fitted to both flat surfaces. Therefore, even if the flat part outer planar part 35a exposed as an external shape of the electrical appliance case 13 receives a physical force, the physical force is absorbed and dissipated by the fitted both surfaces, and the electrical appliance case 13 It is hard to convey inside. That is, a force is hardly transmitted to the inner side planar part 35b, the inverter module 15 connected to this, etc.

On the contrary, the heat transferred from the inverter module 15 or the like is transferred to both flat surfaces sandwiching it in the flat part outer flat part 35a, and can also radiate heat to the case. Therefore, it becomes possible to radiate heat even if the radiating fin is not necessarily provided in the support member 35. In addition, at the contact portion with the substrate back case 31 at the outlet of the electrical appliance case of the support member 35, intrusion of water can be prevented by the plane contact with the water intrusion prevention dam (see the upper substrate case of FIG. 10). . In addition, since the support member 35 is made of metal with excellent thermal conductivity, and the heat radiating fin part 35d can be exposed to the side and the lower surface besides the case, the heat dissipation area becomes large and the heat dissipation effect can be enhanced.

In addition, in this embodiment, the position of the smoothing capacitors 18 and 19 having the highest dimension among electrical appliances is arranged near the center of the substrate 14 above the position of the inverter module 15 or the diode module 16. By one design (refer FIG. 5), the height dimension of the board | substrate upper case 36 by the support member 35 side could be made small to the position near the side height of the board | substrate back case 31. As shown in FIG. That is, the board | substrate upper surface case 36 could be thinned in the position (near side of the board | substrate) of the inverter module 15 in the vicinity of the terminal row on the left side which does not exist the smoothing capacitors 18 and 19. This part can be stepped or inclined.

By making the board | substrate upper case 36 into a step shape, if the electrical appliance case 13 and the blower 4 are made close, these can be arrange | positioned closely. As close as possible, they may come into contact, so that the electrical appliance case 13 is disposed to face the blower 4 in a positional relationship such that it is not in contact. As described above, since the relationship between the electrical appliance case 13 and the blower 4 is improved, the outdoor unit 1 can be miniaturized.

Further, the support member 35 is pulled out from the inverter module 15 or the diode module 16 to the outside, and a plurality of heat dissipation fins 35d are disposed downward from the stepped portion, or in the lateral direction. A plurality of heat radiation fins 35d can be arrange | positioned toward the direction of the side. If sufficient heat transfer area can be secured from either the heat radiation fin in the lateral direction or the heat radiation fin below, there is no need to install it in both, but if it is installed in both, sufficient heat transfer area can be secured.

In addition, it is judged that this stepped part is in which the flow of air is disturbed and it becomes what is called a turbulent state. Therefore, the heat dissipation effect can be improved by using turbulence by arranging the electrical appliance case 13 to face the blower 4. The closer they are, the higher the amount of air available for heat dissipation. In addition, since the mediation of the support member 35 utilizes a space under a small component such as a bootstrap circuit, the heat dissipation space is also widely obtained, which can contribute to the miniaturization of the substrate 14.

Next, another embodiment of the shape of the supporting member will be described in the sectional views of FIGS. 14 and 15. The figure shows the cross section of the part corresponding to FIG. 12 about the support member 43 which changed shape. This support member 43 is comprised so that a cross section may become a crank shape, and is provided with the board | substrate back case fixing plane part 43a at one end, and the board | substrate fixing plane part 43b at the other end. Since the width | variety of the left-right direction of the planar part 43a is made wider than the outer planar part 35a, and more heat radiation fin 43d is provided in the lower surface side, the heat radiation effect can be improved. In addition, since there is no inclined portion in the cross section, the production of the supporting member 43 is easy. Other effects can be obtained in the same manner as in Fig. 12 with the inclined surface portion. Other forms of the support member include Z-shaped cross-sections and straight lines (simple plates as support members). However, the support member is limited to the above-described form as long as it can mediate between the substrate 14 and the substrate back case 31 It doesn't work. In addition, when the support member is made into a simple plate, it is necessary to adjust the height dimensions of the upper substrate case and the lower substrate case.

According to the present invention, the outdoor unit for the air conditioner can be miniaturized. In addition, it is possible to realize a miniaturized outdoor unit for an air conditioner that is hard to be subjected to physical load from the outside by the electric component.

Claims (12)

An outdoor unit for an air conditioner having a blower chamber in which a blower is disposed and an electrical appliance case disposed on a partition plate partitioning a machine chamber in which a compressor is disposed, The electrical appliance case, Board back case, A substrate on which one side is fixed to the substrate back case so as to face the substrate back, and an electrical component such as an inverter module is placed on the other side of the upper surface of the substrate so as to lay down; A support member fixed to the substrate back case, for supporting and fixing the other end side of the substrate by supporting a portion where the inverter module is disposed so as to mediate the substrate back case and the substrate; It has a board | substrate upper surface case which covers the upper surface side of the said board | substrate, An outdoor unit for an air conditioner in which the electrical appliance case is fixed to the partition plate so that the thickness dimension of the other side of the substrate upper surface case is smaller than the thickness dimension near the one side, and the portion of the reduced thickness dimension faces the blower. unit. The outdoor unit for an air conditioner according to claim 1, wherein a smoothing capacitor serving as the electric component is disposed on the one side by disposing the electric component necessary for input of the inverter module on the other side of the inverter module. unit. 2. The outdoor unit of claim 1, wherein the support member has two planes parallel to each other and one inclined surface inclined with respect to these planes. 2. The outdoor unit of claim 1, wherein the support member has two planes parallel to each other and one plane perpendicular to these planes. The outdoor unit for an air conditioner according to claim 1, wherein the fixing of said substrate by said supporting member is performed by screwing from said substrate upper surface case side. The thin metal plate provided with a screw hole is fixed to the substrate, and the thin plate is disposed between the substrate and the inverter module. Arranging the inverter module in which a screw through hole is drilled between the support member and the thin plate, 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. The outdoor unit for an air conditioner according to claim 1, wherein the support member is made of metal and heat dissipation fins are provided on the support member exposed on the outer surface of the electrical appliance case. The air conditioner according to claim 1, wherein the shape of the substrate upper surface case on the other side is stepped, and heat dissipation fins are provided on a flat portion of the support member exposed to the outer surface of the electrical appliance case. Outdoor unit. The method of claim 1, wherein an opening is provided in the electrical appliance case facing the machine room, and a shutter-type window is provided in the upper substrate case. An outdoor unit for an air conditioner, wherein the machine room communicates with the blower room. The method of claim 1, wherein the electrical component comprises a diode module, And the support member supports and fixes the other end side of the substrate by supporting a portion where the inverter module and the diode module are disposed. The said board | substrate back case has a flange surface parallel to the said board | substrate for installing the said support member, The support member has a flat portion parallel to the substrate for mounting on the rear case, The substrate upper surface case has a support member fitting support surface for pressing the flat portion in the rear case direction, And the planar portion of the support member is fitted to the flange surface of the substrate back case and the support member fitting support surface of the substrate upper case. The outdoor unit of claim 1, wherein a sealing member is disposed between the substrate and the substrate rear case.

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