CN101578488B - Outdoor unit of air conditioner - Google Patents

Abstract

The inside of an outdoor unit main body (1) is divided into a heat exchange chamber (8A) for accommodating a heat exchanger (10) and an outdoor blower (13) and a machine chamber (8B) for accommodating a compressor (15) and a piping member (5) by a partition plate (7), the partition plate (7) is divided into an upper partition plate (7A) and a lower partition plate (7B) in the vertical direction, an electric component mounting surface section (S) is provided on the surface of the upper partition plate (7A) on the machine chamber (8B) side, a control board (22) is disposed on the electric component mounting surface section (S), and an electric component (D) for driving and controlling electric components such as the blower and the compressor is mounted on the control board (22). Thus, cost reduction is achieved by improving the mounting structure of the electric component box, and a sufficient cooling effect can be achieved for the control substrate (22) and the electric component (D).

Description

Outdoor unit of air conditioner

technical field

The present invention relates to an outdoor unit of an air conditioner in which an arrangement structure of a control board on which electric components for controlling electric components such as a compressor are mounted is improved.

Background technique

The inside of the main body of the outdoor unit, which is the housing of the outdoor unit constituting the air conditioner, is divided into two chambers, left and right, by a partition plate. One of the divided rooms is the machine room for piping components such as the compressor and four-way switching valve, and the other room is the heat exchange room for the outdoor heat exchanger and outdoor blower.

The drive of electric components such as the above-mentioned compressor, four-way switching valve and outdoor blower is controlled by electric components such as compressor drive components and rectifiers installed on the control board. Conventionally, these electrical components are housed together with a control board in an electrical component box, and the electrical component box is fitted into a notch provided at the upper end of the partition.

However, since the above electrical component box is assembled by bending thin metal plates, it takes a lot of effort to manufacture and assemble. In addition, when the electrical component box is installed in the gap at the top of the partition, a sealing material must be filled between the motor component box and the gap of the partition to prevent water from entering the mechanical room from the heat exchange chamber, which affects the cost.

On the other hand, in Japanese Patent Application Laid-Open No. 2006-214632, an inverter (inverter) substrate with good heat dissipation is brought into contact with the outer plate of the case or the surface of the partition plate on the machine room side. In this way, the heat discharged from the inverter control unit can be dissipated through the outer plate or the partition plate, and there is no need to make an electrical component box, which has the advantage of limiting the man-hour for assembly to the necessary minimum.

In general, thin iron plates are used for the outer plates such as the bottom plate and the front plate that constitute the main body of the outdoor unit, and the same material is used for the partitions that divide the interior of the main body of the outdoor unit. However, the above-mentioned iron plate is inferior in heat transfer performance compared to a material having good heat dissipation performance such as aluminum constituting a heat sink, for example.

Therefore, even if the inverter substrate is simply brought into contact with the outer plate and the separator as described in Japanese Patent Application Laid-Open No. 2006-214632, there is still a problem in terms of heat dissipation efficiency to the inverter substrate. In addition, it is also possible to separate the electrical components with better heat dissipation from the control circuit or install an auxiliary cooling device to compensate for the heat dissipation, but on the contrary, the structure of the machine room will become complicated, resulting in poor manufacturability, and there is a problem in terms of cost. adverse effects.

Contents of the invention

In view of the above problems, an object of the present invention is to provide an outdoor unit of an air conditioner, which includes an electrical component mounting surface on the machine room side of a partition that divides the outdoor unit main body, and by installing a control board for mounting the electrical components, it can Eliminates the need for an electrical component box to reduce costs, and achieves a sufficient cooling effect for the control board and the electrical components mounted on the control board.

In order to achieve the above object, the outdoor unit of the air conditioner of the present invention divides the interior of the outdoor unit main body as a frame into a heat exchange chamber for accommodating a heat exchanger and a blower, a mechanical chamber for accommodating a compressor and piping components, The divider is divided up and down into an upper divider and a lower divider, an electrical component mounting surface is included on the surface of the upper divider on the machine room side, a control substrate is mounted on the electrical component mounting surface, and a control substrate is mounted on the control substrate. Electrical components for drive control of electric components such as blowers and compressors.

Description of drawings

Fig. 1 is a perspective view showing a part of an outdoor unit of an air conditioner according to a first embodiment of the present invention with the omission.

Fig. 2 is a cross-sectional plan view showing an outdoor unit of the air conditioner.

Fig. 3 is a plan view showing part of an outdoor unit of the air conditioner.

Fig. 4 is a longitudinal sectional view showing an outdoor unit of the air conditioner.

Fig. 5 is a front view showing the upper partition with the substrate cover removed.

6 is a perspective view showing a mounting structure for mounting a control board, a board cover, and a reactor to the upper partition.

7 is a plan view showing a mounting structure for mounting a control board, a board cover, and a reactor to the upper partition.

8 is an exploded perspective view showing an outdoor unit of an air conditioner according to a second embodiment of the present invention.

Fig. 9 is a plan view showing a part of the outdoor unit of the air conditioner according to the above embodiment.

Fig. 10 is an enlarged front view showing a part of the outdoor unit according to the above embodiment.

Fig. 11 is a front view showing a part of the outdoor unit according to the above embodiment.

Fig. 12 is a perspective view showing part of the outdoor unit of the air conditioner according to a modified example of the above-mentioned embodiment with the omission of a part.

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show the outdoor unit of the air conditioner in the first embodiment of the present invention, and FIGS. 8 to 12 show the outdoor unit of the air conditioner in the second embodiment of the present invention.

First, the first embodiment will be described. FIG. 1 is a perspective view of a part of an outdoor unit of an air conditioner, FIG. 2 is a cross-sectional plan view of the outdoor unit, and FIG. 3 is a plan view of a part of the outdoor unit.

The outdoor unit main body 1 formed of a frame includes: a rectangular bottom plate 1a with a long horizontal dimension when viewed from above; a front plate 1b erected on the front side of the bottom plate 1a; and a left side plate erected on the left side of the bottom plate 1a. 1c; the right side panel 1d erected on the right side; the rear panel 1e erected on the back side and all the front panel 1b, left panel 1c, right panel 1d, and rear panel 1e set in the upper end range Top plate 1f.

The bottom plate 1a and the top plate 1f are each formed of a single body, but the front plate 1b and the right side plate 1d are integrally bent, and the rear plate 1e and the left side plate 1c are integrally bent. On the bottom plate 1a is placed an integrally bent plate of the front plate 1b and the right side plate 1d, and an integrally bent plate of the rear plate 1e and the left side plate 1c, and openings formed at their upper ends are closed by the top plate 1f.

An air outlet 3 formed by a bell mouth 2 is provided at a position of the front plate 1 b biased toward one side thereof, and a fan guard is embedded in the air outlet 3 . A plurality of steps for reinforcement are formed on the left side plate 1c. The above-mentioned right side plate 1 d includes an opening for inserting the piping member 5 , and the opening is covered with a stuffing valve cover 6 .

The piping components 5 include, in addition to the four-way switching valve and the refrigerant pipe, two filler valves P for connecting to the refrigerant pipe extending from the indoor unit. These priming valves P are attached to the outer surface side of the priming valve cap 6 , and the priming cap 6 is removed for piping connection and maintenance, which facilitates the work.

On the rear plate 1e, strips are provided at predetermined intervals in the longitudinal direction and in the transverse direction, and these strips form openings constituting the suction port with each other. The top plate 1f is formed of a flat plate having a piece portion bent and formed along the periphery. The interior of the outdoor unit main body 1 thus constituted is partitioned into two chambers by a partition plate 7 described later.

The front end portion of the partition plate 7 is attached to the back surface of the front plate 1b on the side of the air outlet 3 provided on the front plate 1b. The rear end portion is attached along a bent corner portion between the rear panel 1e and the right side panel 1d. The partition plate 7 is formed by bending multiple times from the front end to the rear end. The lower end of the partition plate 7 is placed on the bottom plate 1a, and the upper end of the partition plate 7 is in contact with the top plate 1f.

The space chamber located on the left side plate 1c side with respect to the partition plate 7 is called a heat exchange chamber 8A, and the space room located at the right side plate 1d side with respect to the partition plate 7 is called the machine room 8B. Depending on the installation position and form of the partition plate 7, the heat exchange chamber 8A occupies approximately 3/4 of the volume of the entire interior of the outdoor unit main body 1, and the machine chamber 8B occupies the remaining approximately 1/4 of the volume.

In said heat exchange chamber 8A, the outdoor heat exchanger 10 is arrange|positioned in parallel with the rear board 1e at the position close to the rear board 1e on the bottom board 1a. The outdoor heat exchanger 10 is formed in a straight line in plan view, one end is located near the corner of the front panel 1b and the left panel 1c, and the other end is located at the corner of the right panel 1d and the rear panel 1e. nearby. The upper end of the outdoor heat exchanger 10 is extremely close to the top plate 1f.

Moreover, the blower support member 12 which supports the outdoor blower 13 is provided in 8 A of heat exchange chambers. The outdoor blower 13 is arranged surrounded by the outdoor heat exchanger 10, the partition plate 7, the left side plate 1c, and the front plate 1b, and includes a fan motor 13M and a propeller fan 13F mounted on the shaft of the fan motor 13M.

The rotational speed of the fan motor 13M is variable, and the propeller fan 13F functions as a blower, sucking in heat exchange air from the rear side in the axial direction and blowing it out toward the front side. That is, the rear panel 1e having an open structure is the suction side of heat exchange air, that is, outside air, and the front panel 1b and the air outlet 3 are the blowing side. The bell mouth 2 guides the blowing of outside air through the air outlet 3 .

A compressor 15 and a gas-liquid separator 16 are disposed in the machine room 8B, and the piping components 5 including a four-way switching valve connected to the compressor 15 and the gas-liquid separator 16 are accommodated. The compressor 15 and the like are connected to the outdoor heat exchanger 10 in the heat exchange chamber 8A and the indoor heat exchanger housed in the indoor unit through refrigerant pipes to form a refrigeration cycle.

Next, the above-mentioned separator 7 will be described in detail with reference to FIGS. 1 to 3 and 4 .

Fig. 4 is a side view of the outdoor unit when the right side plate 1d of the outdoor unit main body 1 is removed and the machine room 8B side is viewed from the right side of the outdoor unit.

The partition plate 7 is divided up and down at a position separated from the lower end by about 2/3 of the entire height. The upper part formed by dividing is called "upper partition" 7A, and the lower part is called "lower partition" 7B.

As previously described with reference to FIG. 2 , the upper partition plate 7A is bent multiple times from the portion attached to the front plate 1b toward the bent corner between the right side plate 1d and the rear plate 1e in plan view. On the other hand, the lower partition plate 7B protrudes from the lower end position of the upper partition plate 7A toward the heat exchange chamber 8A side in a substantially triangular shape in plan view. Of course, the upper end opening of the lower partition 7B is closed by the triangular cover.

The upper partition 7A is made of a material with excellent thermal conductivity, such as aluminum, and is formed of a flat plate. In particular, the surface of the upper partition plate 7A on the machine room 8B side is referred to as an "electric component mounting surface S" to be described later. On the other hand, for the lower partition 7B, a material having high rigidity and excellent sound insulation, such as a thin iron plate, is used.

The substrate cover 18 and the reactor 20 are mounted side by side on the electric component mounting surface S formed on the upper partition plate 7A. To further explain, the board cover 18 is mounted so as to occupy most of the electrical component mounting surface S from the front end to the rear end, and the rear end of the electrical component mounting surface S is slightly exposed.

On the exposed rear end portion of the electrical component mounting surface S, the reactor 20 , which is a high calorific value electrical component that generates high heat during operation, is mounted. The substrate cover 18 covers the control substrate 22 as will be described later, and the control substrate 22 and the reactor 20 are electrically connected by wires.

The compressor 15 and the gas-liquid separator 16 described above are arranged on the bottom plate 1 a facing the lower partition 7B, and the above-mentioned piping including a four-way switching valve connected to the compressor 15 and the gas-liquid separator 16 is arranged. Class Part 5. In particular, a gas-liquid separator 16 connected to the compressor 15 is accommodated in a triangular space protruding from the machine chamber 8B toward the heat exchange chamber 8A side.

In particular, as shown in FIG. 2 , the lower partition 7B is formed at an inclination angle of α° and the upper partition 7A is formed at an inclination angle of 2α° with respect to the rear plate 1 e in plan view. Since the rear plate 1e is arranged in parallel with the outdoor heat exchanger 10, it can be said that the inclination angle α° of the lower partition plate 7B and the inclination angle 2α° of the upper partition plate 7A are based on the outdoor heat exchanger 10.

That is, in the heat exchange chamber 8A, the outdoor heat exchanger 10 is arranged in parallel close to the rear plate 1 e , and a space is actually formed between the partition plate 7 and the outdoor heat exchanger 10 .

In addition, the partition 7 includes an upper partition 7A and a lower partition 7B, and the space formed by the upper partition 7A and the lower partition 7B with respect to the outdoor heat exchanger 10 depends on the inclination angle of the upper partition 7A and the lower partition 7B. There are differences.

Here, with respect to the outdoor heat exchanger 10, the lower partition plate 7B is formed at an inclination angle of α°, and the upper partition plate 7A is formed at an inclination angle of 2α°. Therefore, the space between the upper partition plate 7A and the outdoor heat exchanger 10 The size is formed to be twice the space between the lower partition plate 7B and the outdoor heat exchanger 10 .

Next, the above-mentioned control board 22 and its peripheral structure will be described in detail.

FIG. 5 is a front view of the electrical component mounting portion S with the substrate cover 18 removed, FIG. 6 is a perspective view of the electrical component mounting portion S with a part of the substrate cover 18 removed, and FIG. The top view of the electrical component mounting part S.

The control board 22 is formed of a rectangular printed circuit board, and its four corners are fixed to the upper partition plate 7A with mounting screws. Actually, as shown in FIGS. 6 and 7 , the control board 22 is not in close contact with the upper partition plate 7A, but has a predetermined gap, and the control board 22 is attached in a state separated from the upper partition board 7A.

As shown in FIG. 5 , a radiator plate 23 having a portion facing the lower end of the control board 22 and portions protruding from the left and right side edges and the lower end edge is attached to the upper partition plate 7A by fixing screws. As shown in FIG. 7 , the radiator plate 23 is divided into two on the left and right, and materials with excellent thermal conductivity such as aluminum are used for each other.

As described above, the surface of the upper partition plate 7A on the side of the machine room 8B is the electrical component mounting surface S, and each radiator plate 23 is closely fixed to the electrical component mounting surface S, and is installed with a gap between the control board 22 and the control board 22. . In other words, the heat dissipation plate 23 exists between the upper partition plate 7A and the control substrate 22 .

A control circuit such as a memory for storing a control program is formed on the control substrate 22, and an electric element D is mounted thereon. As electrical components D, a plurality of electrolytic capacitors 24 and connectors 25 are mounted on the exposed surface of the control board 22 in the machine chamber 8B. A compressor driving element (power transistor) 26 and a rectifier (rectifier) 27 are mounted on the surface opposite to the upper partition 7A.

To further explain, electrolytic capacitor 24 and connector components 25 are mounted on the front side (near side) of control board 22 shown in FIGS. 5 and 6 . The compressor driving element 26 and the rectifier 27 are mounted on the back side (opposite side) of the control board 22 . The electrical components D other than the rectifier 27 are mounted on the surface of the control board 22 , and only the rectifier 27 is mounted protruding downward from the lower end of the control board 22 as shown in FIG. 5 .

In particular, among the electrical components D mounted on the control board 22, the compressor driving component 26 and the rectifier 27 are high-heat-generating electrical components D that generate heat during predetermined functions and make the surroundings a high-temperature state, like the reactor 20 described above.

The compressor driving element 26 is mounted on the surface of the control board 22 , whereas the main body of the rectifier 27 protrudes downward from the lower end of the control board 22 , and both are mounted separately from each other. Because of this, even if the compressor driving element 26 and the rectifier 27 generate high heat from each other as the high-heat-generating electrical element D, there is no thermal influence on each other.

In addition, the heat-generating part of the compressor driving element 26 and the heat-generating part of the rectifier 27 are determined, and both are the back side, that is, the surface on the side of the upper partition plate 7A. Here, the heat dissipation surfaces of the compressor driving element 26 and the rectifier 27 are brought into close contact with the above-mentioned heat dissipation plate 23 provided opposite to the lower end portion of the control board 22 .

As described above, the compressor driving element 26 is mounted on the surface of the control board 22 , and thus is in close contact with the portion of the radiator plate 23 that faces the control board 22 . On the other hand, the main body of the rectifier 27 protrudes downward from the lower end of the control board 22 , so that it is in close contact with the portion of the radiator plate 23 protruding from the lower end of the control board 22 .

The substrate cover 18 is attached to the electrical component mounting surface S of the upper partition plate 7A, and covers the control substrate 22 , the electrical components D mounted on the control substrate 22 , and the heat sink 23 . That is, the width direction of the substrate cover 18 extends from between the control substrate 22 and the reactor 20 to the vicinity of the front plate 1 b , and its vertical dimension is larger than that of the control substrate 22 .

The electrolytic capacitor 24 is mounted on one side of the control board 22 , while a relatively small electrical component S such as a connector-like component 25 is mounted on the other side. The portion facing the electrolytic capacitor 24 has the largest protruding height from the electrical component mounting surface S of the substrate cover 18 , and the substrate cover 18 includes an inclined portion a bent obliquely toward the connector-like component 25 mounting side.

As shown in FIGS. 5 to 7 , the end of the inclined portion a of the substrate cover 18 is closely fixed to the bent end portion of the upper partition plate 7A. The bent end portion of the upper partition plate 7A is attached to the front plate 1b constituting the outdoor unit main body 1 (not shown). In addition, a ventilation louver 28 is provided at the bent end portion of the upper partition 7A.

The substrate cover 18 is divided up and down, and includes an upper substrate cover 18A and a lower substrate cover 18B. FIG. 2 shows only the upper substrate cover 18A, and FIGS. 6 and 7 show only the lower substrate cover 18B. 1 and 4 show the upper substrate cover 18A and the lower substrate cover 18B.

The substrate cover 18 including the upper substrate cover 18A and the lower substrate cover 18B forms an enclosure structure by being attached to the upper partition plate 7A, and is held with great rigidity. However, since the above-mentioned ventilation louvers 28 are included, the inside and the outside of the substrate cover 18 communicate through the ventilation louvers 28 and are not completely airtight.

In addition, as shown in FIG. 4 , the lower end of the side surface of the substrate cover 18 facing the reactor 20 is partially opened. The opening 29 is for inserting a wire whose one end is connected to the electrical component D mounted on the control board 22 , and is referred to as a "wire insertion opening" 29 hereinafter.

One end of the wire is connected to the electrical component D on the control board 22, and the other end is connected to the electric components such as the compressor 15 and the four-way switching valve arranged in the machine room 8B, and the outdoor blower 13 arranged in the heat exchange chamber 8A, that is, the electric motor. Part connection. Therefore, the electrical component D is electrically connected to the electric parts through wires.

The lower substrate cover 18B covers most of the control substrate 22 except the upper end portion, and covers the electrolytic capacitor 24 and the like among the electric components D mounted thereon. The above-mentioned lead wire insertion opening 29 is provided at a lower end corner portion of the lower substrate cover 18B. The upper substrate cover 18A covers only the upper end portion of the control substrate 22 .

Viewing the substrate cover 18 as a whole, the wire insertion opening 29 is provided at one end of the substrate cover 18 , and the opposite end of the substrate cover 18 is the inclined portion a formed obliquely in plan view. The above-mentioned ventilation louvers 28 are provided on the upper partition plate 7A facing the end surface of the inclined portion a, and the inside of the substrate cover 18 communicates with the heat exchange chamber 8A through the ventilation louvers 28 .

In the outdoor unit of the air conditioner configured in this way, when a signal to start the air-conditioning operation (cooling operation) is input, the drive of the compressor 15 is controlled to perform the refrigeration cycle operation. Simultaneously, the outdoor air blower 13 is driven to suck the outside air into the outdoor unit main body 1 through the opening formed on the rear panel 1 e, so that it circulates in the outdoor heat exchanger 10 .

In the outdoor heat exchanger 10, the refrigerant compressed by the compressor 15 flows through the four-way switching valve, and the refrigerant exchanges heat with the external air. Thereafter, the refrigerant is guided toward the indoor unit to exchange heat with the indoor air, thereby air-conditioning the room. The outside air after heat exchange with the outdoor heat exchanger 10 is guided toward the bell mouth 2 and blown out from the air outlet 3 through the fan guard.

As described above, among the electrical components D mounted on the control board 22 , especially the compressor drive component 26 and the rectifier 27 tend to generate heat. In addition, the control board 22 on which these compressor driving elements 26 and the rectifier 27 are mounted is housed in a box structure that is substantially sealed by the board cover 18 and the upper partition plate 7A, and therefore heat will be generated between them unless some countermeasures are taken. Influence.

Here, the heat dissipation surfaces of the compressor driving element 26 and the rectifier 27 which are high-heat-generating electrical components D are in close contact with the heat dissipation plate 23 , and the heat dissipation plate 23 is in close contact with and fixed on the upper partition plate 7A. Since the cooling plate 23 and the upper partition 7A are made of materials with excellent thermal conductivity, the high heat emitted by the compressor drive element 26 and the rectifier 27 diffuses on the cooling plate 23 and then transfers to the upper partition 7A.

That is, high heat emitted from the compressor driving element 26 and the like is absorbed by the radiator plate 23 and the upper partition plate 7A. On the other hand, the external air introduced into the heat exchange chamber 8A by the blowing action of the outdoor blower 13 is introduced while being in contact with the upper partition plate 7A and the lower partition plate 7B constituting the partition plate 7, and these upper and lower partition plates 7A are brought into contact with each other. , 7B cooling efficiently.

In particular, as explained with reference to FIG. 2 , with respect to the outdoor heat exchanger 10 , the lower partition plate 7B is formed at an inclination angle α°, and the upper partition plate 7A is formed at an inclination angle of 2α°. Therefore, the size of the space between the upper partition 7A and the outdoor heat exchanger 10 is twice the size of the space between the lower partition 7B and the outdoor heat exchanger 10 .

Part of the external air introduced into the heat exchange chamber 8A and flowing through the outdoor heat exchanger 10 is guided along the upper partition plate 7A and the lower partition plate 7B constituting the partition plate 7 . At this time, since the space between the upper partition 7A and the outdoor heat exchanger 10 is approximately twice the size of the space between the lower partition 7B and the outdoor heat exchanger 10 , the flow rate of outside air is also doubled.

Radiating plates 23 are closely attached to and fixed on the upper partition plate 7A, and the heat dissipation surfaces of the compressor driving element 26 and the rectifier 27 which are high-heat-generating electrical components D are closely mounted on these cooling plates 23 . Since a large amount of external air flows along the upper partition 7A, not only the upper partition 7, but also the radiator plate 23 and the high-heat-generating electrical components D are efficiently cooled, and thermal adverse effects can be prevented.

In addition, external air is also introduced into the machine compartment 8B by the blowing action of the outdoor blower 13 . The external air introduced into the machine chamber 8B contacts the compressor 15 and is discharged to the outside after being cooled. In addition, the external air introduced into the machine compartment 8 also contacts the reactor 20 and is discharged to the outside after being cooled.

As shown in FIG. 7 , part of the outside air is guided inward through the opening 29 for wire insertion provided in the substrate cover 18 . The external air introduced into the substrate cover 18 comes into contact with electrical components D such as the control substrate 22, the electrolytic capacitor 24, the compressor drive element 26, and the rectifier 27 and the heat sink 23 housed in the substrate cover 18 as indicated by arrows, and they cool down.

Since the side portion of the substrate cover 18 opposite to the wire insertion opening 29 is the inclined portion a, once the inside of the substrate cover 18 reaches the inclined portion a, the flow velocity of the outside air increases. The outside air in the substrate cover 18 flows efficiently to cool the electrical components D and the like, and is finally led out from the ventilation louver 28 .

In this way, the electrical components D and the like mounted on the control board 22 are cooled from both the inside and the outside of the board cover 18 , so that they are not adversely affected by heat. Since the machine chamber 8B side of the upper partition plate 7A constituting the partition plate 7 is the electrical component mounting surface S, there is no need for an electrical component box horizontally arranged on the top of the partition plate within the range of the heat exchange chamber and the mechanical room as in the past. Ease of assembly workability and cost reduction by reducing the number of parts.

Since there is no electric component box of the above-mentioned structure, the space above the machine room 8B is enlarged, and the attenuation of the operating sound of the compressor 15 is promoted, thereby reducing noise. Since the electrical component S is attached to the partition plate 7 itself, there is no need for a conventional sealing material for preventing water from entering the machine room from between the electrical component box and the partition plate.

Since the partition 7 is divided into an upper partition 7A and a lower partition 7B, the lower partition 7B can be bent and formed according to the arrangement space of the compressor 15 accommodated in the machine room 8B, and manufacturability can be improved.

It is possible to select materials corresponding to each function, such as using an aluminum material that emphasizes heat transfer for the upper partition 7A, and a material that emphasizes strength and sound insulation for the lower partition 7B, to enhance functionality and achieve improved manufacturability and cost savings. reduce.

Among the electrical components D installed on the control board 22, the electrical components D with large heat generation such as the compressor drive component 26 and the rectifier 27 are closely attached to the heat dissipation plate 23 whose heat dissipation surface is formed of a material with good thermal conductivity, and the heat dissipation The plate 23 is fixed in close contact with the electrical component mounting surface S of the upper partition plate 7A, thereby improving the heat dissipation efficiency of the electrical component D that generates a large amount of heat, and preventing thermal adverse effects.

In addition, the control board 22 is covered with the board cover 18 , and the box structure is constituted by the board cover 18 and the upper partition plate 7A. Thereby, even if the electrolytic capacitor 24 breaks for some reason, the electrolytic solution can be prevented from dripping into the machine compartment 8B.

The inclined portion a is provided on the substrate cover 18 to increase the flow velocity of the outside air flowing through the substrate cover 18 . Therefore, the control board 22 covered with the board cover 18 and the high-heat-generating electrical components D such as the compressor drive element 26 and the rectifier 27 mounted on the control board 22 can be efficiently cooled, and the temperature rise in the board cover 18 can be suppressed.

The lower partition 7B has an inclination angle of α° and the upper partition 7A has an inclination angle of 2α° with respect to the rear plate 1 e in plan view. That is, with respect to the ventilation passage on the side of the heat exchange chamber 8A of the partition 7, the part along the upper partition 7A is doubled in size compared to the part along the lower partition 7B, and the air passage under the action of the outdoor blower 13 Large air volume.

Therefore, the upper partition plate 7A is efficiently cooled, and the radiator plate 23 fixed on the electrical component mounting surface S of the upper partition plate 7A, and the compressor drive element 26 and the rectifier that make the radiator surface closely contact with the radiator plate 23 27 and other high-heat-generating electrical components D are also efficiently cooled. According to these structures and functions, thermal adverse effects caused by the high-heat-generating electrical component D can be reliably prevented.

Next, a second embodiment of the present invention will be described.

Fig. 8 is an exploded perspective view of the outdoor unit of the air conditioner. Except for a partition plate 70 described later, other components are the same as those described above with reference to FIG. 1 , and thus the same reference numerals are assigned here, and new descriptions are omitted.

The partition plate 70 also divides the interior of the outdoor unit main body 1 into a heat exchange chamber 8A and a machine chamber 8B, but here it is not particularly divided into upper and lower parts, and as before, it is a one-piece member that has been bent multiple times.

An electric component mounting surface S is formed on the upper surface of the partition plate 70 on the machine room 8B side, and the control board 22 on which the electric component D is mounted and the reactor 20 which is an electric component not mounted on the control board 22 are mounted.

9 is an enlarged plan view of a part of the outdoor unit for explaining the installation structure of the control board 22 and the electrical component D toward the partition plate 70. FIG. 10 is an enlarged front view of a part of the outdoor unit for explaining the installation structure. FIG. 11 is the same It is a perspective view of a part of the partition explaining the installation structure.

The end portion of the partition plate 70 abutting against the front plate 1b of the outdoor unit main body 1 is bent obliquely, but the amount of bending is small. The partition plate 70 is formed in parallel with the left and right side panels 1c and 1d in the direction perpendicular to the front panel 1b from the bent end, and then is bent toward the right side panel 1d and the rear panel 1e in the middle part of the front and back. The extended shape of the corner is formed by oblique bending.

The obliquely bent portion of the partition plate 70 is close to the outdoor heat exchanger 10, and the control board 22 is mounted on the electrical component mounting surface S formed on the upper portion of the machine room 8B side. The control board 22 is mounted parallel to the spacer 70 with a narrow gap between the spacer 70 and the spacer 70 by means of a resin mount.

In addition, a radiator plate 23A facing the lower end of the control board 22 and having an area protruding (about 10 mm) from the left and right side edges and the lower end edge of the control board 22 is attached to the spacer 70 with fixing screws.

The radiator plate 23A is made of a material with excellent thermal conductivity such as aluminum, and is fixed in close contact with the electrical component mounting surface S of the partition plate 70 . The radiator plate 23A and the control substrate 22 have a gap therebetween, and exist between the spacer 70 and the control substrate 22 .

A control circuit such as a memory storing a control program is formed on the control board 22 , and a plurality of electrolytic capacitors 24 and connectors 25 are mounted on the surface of the control board 22 on the machine room 8B side. The electrolytic capacitors 24 are arranged in a row on the lower side of the control board 22 , and the connector components 25 are arranged in a row on the upper part of the control board 22 .

A compressor driving element (power transistor) 26 and a rectifier (rectifier) 27 are mounted on the surface of the control board 22 that faces the spacer 70 . The cooling surfaces of these compressor driving elements 26 and the rectifier 27 face the cooling plate 23A, and are closely fixed on the cooling plate 23A.

The radiator 30 shown only in FIG. 9 is provided on the side of the heat exchange chamber 8A at the portion where the radiator plate 23A is provided with the partition plate 70 , that is, at a portion separated from the radiator plate 23A by the partition plate 70 . In addition, an opening for exposing the radiator plate 23A may be provided in the partition plate 70, and the heat sink 30 may be fitted into the opening to attach the radiator 30 to the radiator plate 23A in a state of close contact.

A reactor 20 as a high calorific value electrical element D is mounted on the side surface of the control board 22 on the spacer 70 . As described above, the partition plate 70 includes a plate portion parallel to the left and right side plates 1c and 1d constituting the outdoor unit main body 1, and the above-mentioned reactor 20 is mounted on the parallel plate portion.

In particular, as shown in FIG. 11 , the reactor 20 is mounted on the upper end of the separator 70 and is positioned above the electrolytic capacitors 24 mounted in a row on the lower end of the control board 22 . Of course, the unillustrated compressor driving element 26 and rectifier 27 mounted on the back side of the lower end portion of the control board 22 are located above.

That is, in the first embodiment, the control board 22 mounted on the spacer 7 is covered with the board cover 18, but it is not limited thereto, and may be mounted on the spacer 70 as described in the second embodiment. The upper control substrate 22 is not covered, but is completely exposed.

During refrigeration cycle operation, the outdoor blower 13 is driven to introduce outside air into the heat exchange chamber 8A to exchange heat with the heat exchanger 10 . Simultaneously, a certain amount of outside air is also introduced into the machine chamber 8B, and it flows inside to cool the compressor 15 and the like disposed therein, and to cool the control board 22 and the reactor 20 .

The compressor driving element 26 and the rectifier 27 and other high-heat-generating electrical components D mounted on the control board 22 are closely attached to the heat dissipation plate 23A whose heat dissipation surface is made of a material with good thermal conductivity, and the heat dissipation plate 23A is installed in a state of close contact. Since it is fixed to the spacer 70, it is possible to improve the heat dissipation efficiency of the high-heat-generating electrical component D, and to prevent thermal adverse effects.

Since the radiator 30 is mounted on the back side of the radiator plate 23A through the partition plate 70, or directly provided on the backside of the radiator plate 23A, the radiator 30 radiates heat to the outside air introduced into the heat exchange chamber 8A. Therefore, it is possible to further improve the heat dissipation efficiency of the high-heat-generating electrical component D, and prevent thermal adverse effects.

Since the reactor 20 is mounted above the electrolytic capacitor 24 mounted on the control board 22 at the upper end of the partition plate 70, the heat generated from the reactor 20 can escape upwards, preventing damage to the control board 22 and the installation. The electrolytic capacitor 24 on the control substrate 22 causes thermal influence. Therefore, the safety of the electrolytic capacitor 24 can be further improved.

FIG. 12 shows a modified example of the second embodiment. Although the connector components 25 and the electrolytic capacitors 24 mounted on the control board 22 are arranged in a line in the longitudinal direction, there is no change in their functions. This modified example is characterized in that the lower end portion of the control substrate 22 is surrounded by an electrolytic solution drip-proof case 35 .

That is, the electrolyte solution drip-proof box 35 is mounted on the separator 70 with packing interposed therebetween, and the mounting part of the electrolyte solution drip-proof box 35 on the separator 70 has a liquid-tight structure. The upper end of the electrolytic solution drip-proof box 35 is opened, and the lower end of the control substrate 22 is inserted thereinto. In addition, the above-mentioned compressor 15 and gas-liquid separator 16 are covered by the soundproof box 40, and the leakage of operating noise to the outside is suppressed.

With such a structure, even if the electrolytic capacitor 24 breaks for some reason such as being affected by the heat of the reactor 20, the leaked electrolytic solution will be caught by the electrolytic solution drip-proof box 35 and will not leak to the lower part. The electrolytic solution does not drip toward the compressor 15, the gas-liquid separator 16, and the soundproof box 40, and the expansion of the accident can be prevented.

In addition, since the compressor 15 and the gas-liquid separator 16 are covered by the soundproof box 40, even if the scattered electrolyte rebounds, it will not stick to the compressor 15 and the gas-liquid separator 16, realizing a double safety measure.

In addition, the present invention is not limited to the above-mentioned embodiments, and the constituent elements may be modified and embodied in the range not departing from the gist at the stage of implementation. Furthermore, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-mentioned embodiments.

Industrial availability

According to the present invention, by improving the installation structure of the electrical component box, cost reduction is achieved, and the effect of reliably cooling the control board and the installed electrical components is achieved.

Claims (2)

1. An outdoor unit of an air conditioner, characterized in that it has an outdoor unit main body as a frame, and the inside of the outdoor unit main body is divided into a heat exchange chamber for accommodating a heat exchanger and a blower, accommodating a compressor and Mechanical room for piping components, The partition is divided up and down into an upper partition and a lower partition, The upper partition is formed of a material with good thermal conductivity, and the surface of the upper partition near the machine room side includes an electrical component mounting surface, A control board and a reactor are arranged side by side on the electrical component mounting surface. The control board drives and controls the fan motor and compressor of the blower. The reactor is arranged near the control board. A heat dissipation plate made of a material having good thermal conductivity and existing between the upper partition plate and the control substrate is closely fixed on the component mounting surface, The upper partition includes a ventilation louver that discharges outside air flowing through the control board and the mounting surface of the electrical component to the outside, The control substrate is covered by a substrate cover, and the substrate cover includes openings for inserting wires for connecting to electrical components mounted on the control substrate, and includes openings for increasing the flow rate of external air introduced into the control substrate and the electrical components. The rear is directed toward the ventilation with a sloping portion of the louver grille. 2. The outdoor unit of an air conditioner according to claim 1, wherein: As electrical components mounted on the control substrate, including electrolytic capacitors, As an electrical component not mounted on the control substrate but arranged in the vicinity of the control substrate, a reactor is included, At the lower end of the control board, the electrolytic capacitor is disposed below the reactor.

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