JP3259719B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to an air conditioner in which an electric component unit is arranged in an improved space.

[0002]

2. Description of the Related Art FIG. 15 is a transparent front view showing an indoor unit of a conventional air conditioner. In the main body casing 81,
An indoor heat exchanger 82 is provided in which the front heat exchanger and the rear heat exchanger are connected in an inverted V-shape. And, as it is sandwiched between the inverted V-shaped of this indoor heat exchanger 82,
A cylindrical cross flow fan 83 is arranged. The cross flow fan 83 is driven to rotate by a fan motor 85 provided on the right side of the indoor heat exchanger 82. When the cross flow fan 85 is rotationally driven, the indoor air is sucked in from the front of the indoor heat exchanger 82 and heat is exchanged by the indoor heat exchanger 82. Is blown out into the room.

An auxiliary pipe 86 is drawn out of the indoor heat exchanger 82 from the right side in FIG. The auxiliary pipe 86 is composed of a liquid pipe and a gas pipe which form a refrigerant circuit with an outdoor unit (not shown). The auxiliary pipe 86 is disposed on the right side of the indoor heat exchanger 82 after being drawn from the indoor heat exchanger 82.
The auxiliary pipe 86 is further heat-insulated to form a communication pipe 88, and the communication pipe 88 is provided from the right side to the left side of the main casing 81 through the back of the main casing 81. Further, an electrical component box 90 for disposing electrical components such as a microcomputer and a power amplifier for driving a motor is provided on the right side of the auxiliary pipe 86 so as not to obstruct the air flow path.

[0004]

In the indoor unit, an auxiliary pipe 86 drawn from the indoor heat exchanger 82 is provided on the right side of the indoor heat exchanger 82. Further, an electrical component box 90 is provided on the right side of the auxiliary pipe 86. In other words, two spaces that do not directly contribute to heat exchange, that is, the space for drawing out the auxiliary pipe 86 and the electrical component box 90 occupy the inside of the main body casing 81, and reduce the width of the indoor heat exchanger 82 by the amount of these two spaces. That is, we have to do it. Of course, from the viewpoint of air conditioning efficiency, it is desirable that the width of the indoor heat exchanger 82 be large. On the other hand, however, increasing the width of the main body casing 81 is not desirable from the viewpoint of limiting installation space and maintaining installation workability. Therefore, it is desired to reduce the space in the main casing 81 that does not directly contribute to heat exchange as much as possible, to increase the width of the indoor heat exchanger 82 without increasing the width of the main casing 81, and to improve the air conditioning efficiency. Was rare.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to improve the air conditioning efficiency by increasing the size of a heat exchanger without increasing the size of a main body casing. It is an object of the present invention to provide an air conditioner that can make a main body casing compact without making it possible or reducing the size of the heat exchanger.

[0006]

Therefore, the air conditioner according to the first aspect of the present invention comprises an electric component unit 14 disposed in the indoor unit casing 1, and the electric component unit 14 extends along the longitudinal direction of the indoor unit casing 1. Thus, the high voltage circuit section 24 and the low voltage circuit section 25 are arranged in order from the power input section 22 side.

According to the air conditioner of the first aspect, the circuit configuration of the electrical component unit 14 is a serial layout along the longitudinal direction of the indoor unit casing 1. It can be an elongated shape along the direction. Therefore, the electrical component unit 14 can be arranged in various spaces as viewed from a cross section orthogonal to the longitudinal direction of the indoor unit casing 1. That is, a special space for disposing electrical components is not required on the side of the indoor unit casing 1 as in the related art. Therefore, the longitudinal dimension of the indoor unit can be reduced,
The indoor unit can be made compact. Conversely, conversely, in the indoor unit having the same dimensions as the conventional one, the space for disposing the heat exchanger and the fan can be increased, and therefore, the air conditioning performance can be improved as compared with the conventional one. .

According to a second aspect of the present invention, in the air conditioner of the first aspect, an AC circuit section 23, a DC high voltage circuit section 24, and a DC low voltage circuit section 25 are arranged in this order from the AC power input section 22 side. It is characterized by:

The air conditioner of the second aspect also has the advantages of making the indoor unit compact and improving the air conditioning performance, as in the first aspect of the invention. This circuit configuration is suitable for the case where AC is converted to DC and then voltage is converted.

The air conditioner according to a third aspect of the present invention is the air conditioner according to the first aspect of the present invention, wherein the AC high voltage circuit section 23, the AC low voltage circuit section 23a, and the DC low voltage circuit section 25 are arranged in this order from the AC power input section 22 side.
Is characterized by being arranged.

The air conditioner according to the third aspect also has the advantage that the indoor unit is compact and the air conditioning performance is improved, as in the first aspect of the invention. This circuit configuration is suitable for a model that performs step-down by a transformer or the like.

A fourth aspect of the present invention is the air conditioner according to the first aspect, wherein a DC high voltage circuit section 24 and a DC low voltage circuit section 25 are arranged in order from the DC power supply input side.

The air conditioner according to the fourth aspect also has the advantages of making the indoor unit compact and improving the air conditioning performance, as in the first aspect of the invention. This circuit configuration is AC-
It is suitable for a model having a DC converter outside the device.

According to a fifth aspect of the present invention, in the air conditioner of the first to fourth aspects, the power input section 22 is provided on the side of the indoor unit casing 1 where the high-pressure drive actuator 35 is disposed. It is characterized by.

According to the air conditioner of the fifth aspect, since the high-voltage drive actuator 35 is disposed close to the high-voltage circuit section 24, the connection harness can be shortened, and the configuration can be simplified. Connection and assembly work is facilitated.

According to a sixth aspect of the present invention, in the air conditioner of the fifth aspect, a side of the indoor unit casing 1 opposite to the side on which the high-voltage drive actuator 35 is disposed, and the side where the low-voltage circuit unit 25 is located. Is provided with a low-pressure drive actuator 36.

According to the air conditioner of the sixth aspect, since the low-voltage drive actuator 36 is disposed close to the low-voltage circuit section 25, the connection harness is further shortened and the configuration can be simplified. At the same time, connection and assembly work is further facilitated.

According to a seventh aspect of the present invention, in the air conditioner according to the sixth aspect, the high-pressure drive actuator 35 is an indoor fan drive motor, and the low-pressure drive actuator 36 is a flap control motor. However, this air conditioner is suitable for the implementation.

According to an eighth aspect of the present invention, in the air conditioner according to the first to seventh aspects, one or more of the circuit units 24 and 25 are formed as a single printed circuit board 28, 2 or 3 as a unit block.
9, a plurality of printed circuit boards 28 and 29 are arranged side by side in the longitudinal direction of the indoor unit casing 1.

According to the air conditioner of the eighth aspect, since one or a plurality of circuit units 24 and 25 are housed in one printed circuit board 28 and 29 as a unit block, maintenance work can be facilitated.

According to a ninth aspect of the present invention, in the air conditioner of the first to eighth aspects, the longitudinal dimension of the space in which the electrical component unit 14 is arranged is 1/1 / the longitudinal dimension of the indoor unit casing 1. It is characterized by having two or more dimensions.

In the air conditioner according to the ninth aspect, since the electrical component unit 14 has an elongated shape along the longitudinal direction of the indoor unit casing 1, the electric component unit 14 has various shapes as viewed from a cross section orthogonal to the longitudinal direction of the indoor unit casing 1. It is possible to arrange the electrical component unit 14 in the space described above, so that the longitudinal dimension of the indoor unit can be reduced, and as in the case of the first aspect, the advantages of making the indoor unit compact and improving the air conditioning performance can be obtained.

According to a tenth aspect of the present invention, in the air conditioner according to the first to ninth aspects, the electrical component unit is disposed at a position above the air outlet of the indoor unit casing and the drain pan of the indoor heat exchanger. It is characterized in that it is disposed in a region extending in the lateral direction between the front panel 13 and the front panel 7 of the indoor unit casing 1.

In a case where a drain pan 13 is provided below the indoor heat exchanger 4 in a region located above the air outlet 11 of the indoor unit as in the air conditioner of the tenth aspect, the drain pan 13 The position between the indoor unit casing 1 and the front panel 7 is an area that reliably becomes a dead space. Therefore, by arranging the electrical component unit 14 in this area, the space in the indoor unit casing 1 can be more effectively utilized, and as a result, the indoor unit can be made more compact and the air conditioning performance can be further improved. Become.

An air conditioner according to an eleventh aspect of the present invention is the air conditioner according to the tenth aspect, wherein the electrical components 41, 42, and 43 having a large amount of self-heating are arranged above the printed circuit board 28 in the electrical component unit 14. It is characterized by:

In the air conditioner according to the eleventh aspect,
Since the electric components 41, 42, and 43 having a large amount of self-heating are arranged above the printed circuit board 28, each electric component 4
The heat radiation of 1, 42, and 43 can be promoted, and the influence of heat radiation on other electric components can be prevented.

According to a twelfth aspect of the present invention, in the air conditioner of the tenth or eleventh aspect, the electric component unit
The heat radiating hole 45 for cooling is opened to the front side.

In the air conditioner according to the twelfth aspect,
The heat radiating hole 45 is opened toward the front side, so that the air flowing through the front side can promote the heat radiation of the electric components 41, 42, 43 having a large amount of self-heating. Further, since the heat radiating hole 45 is opened toward the front side, the intrusion of drain water can be prevented, and the reliability of the device can be maintained.

According to a thirteenth aspect of the present invention, in the air conditioner according to the first to twelfth aspects, the power supply input section is formed as a terminal board, and the insertion direction of the VVF line of the terminal board is set in the indoor unit casing. 1 in the longitudinal direction.

According to a fourteenth aspect of the present invention, in the thirteenth aspect, the VVF line 38 is inserted in a direction from the power input part 22 to the low-voltage circuit part 25. .

In the air conditioner according to the thirteenth and fourteenth aspects, the direction in which the VVF line 38 is inserted into the terminal board 22 is the longitudinal direction of the indoor unit casing 1, and Although the direction is toward the low-voltage circuit section 25, the insertion and connection of the VVF line 38 can be facilitated by inserting the VVF line 38 in such a direction.
8 can be prevented from interfering with each of the circuit sections 23, 24, and 25, thereby facilitating line routing work and reducing noise.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a specific embodiment of the air conditioner of the present invention will be described in detail with reference to the drawings. First, the first embodiment will be described. This air conditioner has a structure including an outdoor unit and an indoor unit, and the following description will be made on a wall-mounted indoor unit.

(First Embodiment) First, FIGS. 3, 4 and 5
Based on the description, the internal structure will be described. First, FIG.
As shown in the figure, the indoor unit casing 1 of the indoor unit
A main body casing 1a to which main components such as the indoor heat exchanger 4, the cross flow fan 9, and the electrical component unit 14 are attached, a front grille 5 attached to the front surface of the main body casing 1a, and a further front side of the front grille 5 The front panel 7 has a horizontally long shape having a width dimension longer than a vertical dimension as a whole. Among them, the front panel 7 is arbitrarily removable by the user, but the main body casing 1a and the front grill 5
Means that the user cannot remove it. Then, as shown in FIGS. 3 and 4, inside the indoor unit casing 1,
A plate fin-shaped indoor heat exchanger 4 configured by arranging the front heat exchanger 2 and the rear heat exchanger 3 in an inverted V-shape is arranged. As shown in FIG. 4, the indoor unit casing 1 has a top surface suction port 6 formed in a ceiling portion of a front grille 5 and a front surface suction port 8 formed in a front panel 7.
Among them, the top surface suction port 6 is formed by forming a ceiling portion of the front grille 5 in a lattice shape, and the front side suction port 8 extends in the center of the front panel 7 at a slightly upper portion in a lateral direction through an upward opening. It is formed by providing. A cross flow fan 9 is provided inside the inverted V-shaped heat exchanger 4. This cross flow fan 9
Is called an axial fan, and is arranged such that the axial direction thereof is along the longitudinal direction of the indoor unit casing 1. A scroll portion 10 is formed behind the cross flow fan 9, and is smoothly connected to an air outlet 11 that opens at a lower portion on the front side of the indoor unit casing 1.

The upper wall surface 12 of the outlet 11 is formed integrally with a drain pan 13 located below the front heat exchanger 2. An electrical component unit 14 is disposed at a position on the front side, that is, between the drain pan 13 and the front panel 7. In addition, the back side drain pan 15 is arrange | positioned in the lower part of a back side heat exchanger.

The indoor unit itself and the indoor unit casing 1 are horizontally long as shown in FIGS.
The front inlet 8 and the outlet 11 are formed so as to extend along the longitudinal direction (lateral direction) of the indoor unit casing 1. The electrical component unit 14 is provided with the outlet 1
1 and at a position on the front side of the drain pan 13, as shown in FIGS. 1 and 2, in a mode extending laterally along the longitudinal direction of the indoor unit casing 1. ing.

The specific structure of the electric component unit 14 will be described with reference to FIGS. 6, 7 and 8. FIG.
In the figure, reference numeral 20 denotes an electrical component case for accommodating the electrical component unit 14, and 21 denotes an electrical component cover that covers the electrical component unit 14, and the electrical component unit 14 is disposed between the two. As shown in FIG. 8, the electrical component unit 14 includes a terminal board 22 as a power input unit connected to a commercial power supply (100 V AC or 200 V AC), an AC circuit unit 23, a DC high-voltage circuit unit 24, and a DC low-voltage circuit unit 25. , CPU control unit 2
6 and a light-emitting display section 27, and as shown in FIGS.
In addition, the DC low voltage circuit section 25 is
In addition, the light emitting display unit 27 is mounted on the display substrate 30. As shown in FIGS. 6 and 7, the terminal board 22, the AC circuit section 23, the DC high-voltage circuit section 24, the DC low-voltage circuit section 25, and the CPU control section 26 extend from the right side to the left side in FIG. 1 are arranged in series along the longitudinal direction, and attached to the electrical component case 20. The display substrate 30 is attached to the back side of the electrical component cover 21, and in this state, the electrical component case 20 is covered with the electrical component cover 21. Openings 31 are formed in the electrical component cover 21 at positions corresponding to the LEDs of the light-emitting display unit 27, 7-segment LEDs, and the like (light-emitting display means) so that the LEDs can be observed from the outside.

In the electrical component unit 14, the first printed board 2
8, the second printed circuit board 29, and the display substrate 30 are all formed as long as possible. And the first
The printed board 28 and the second printed board 29 are connected by a board-to-board connector 39 without using a harness (harnessless).

In the DC high-voltage circuit section 24 provided on the first printed circuit board 28, heat generating components such as the SW transformer 41, the rectifier diode 42, and the primary side SW element 43 are used. Many electrical components 41, 4
As shown in FIG. 7, the reference numerals 2 and 43 are arranged above the first printed circuit board 28 extending in the vertical direction to promote the heat radiation of the electric components 41, 42 and 43, and to make the other electric components To prevent the effect of heat radiation. Further, the electrical component unit 14 is, as described above, the electrical component case 2.
0, and is covered by the electrical component cover 21. The upper part of the electrical component case 20 and the electrical component cover 21
A certain gap (portion indicated by reference numeral 45 in FIG. 7) is provided as a heat-dissipating hole between the upper portion and the upper portion, and this gap is opened toward the front side, whereby the air flowing through the front side generates self-heating. The heat radiation of the electrical components 41, 42, 43, which are often used, is promoted. In addition, by opening the heat radiation hole to the front side, while preventing the intrusion of drain water,
Maintains equipment reliability.

In the above air conditioner, a DC PWM type indoor fan drive motor for driving the cross flow fan 9 is provided on the right side in FIG. 1 and a flap control motor (stepping motor) for driving and controlling the horizontal flap.
1 are arranged on the left side in FIG. 1. As shown in FIG. 8, the indoor fan drive motor 35 is supplied with electric power from the DC high-voltage circuit section 24, and the flap control motor 36 is supplied with electric power. Is supplied with power from the DC low-voltage circuit unit 25. That is, as shown in FIGS. 6 and 7,
The DC high-voltage circuit section 24 is arranged on the right side and the DC low-voltage circuit section 25 is arranged on the left side. Similarly, the indoor fan drive motor 35 as a high-pressure drive actuator is placed on the right side, and the flap control as a low-pressure drive actuator. The circuit motors 24 and 25 and the actuators 35 and 36 are arranged as close as possible by arranging the motor 36 for use on the left side.

As shown in FIG. 8, the indoor unit is connected to the outdoor unit 37, and this connection is made to the VVF line 38.
It is done with. The VVF line 38 includes a pair of power supply AC lines and a transmission line for internal and external transmission. The VVF line 38 as the internal and external connection line is connected to the terminal board 22 with reference to FIGS. 7 can be inserted and connected from the right side. That is, the direction in which the VVF line 38 is inserted into the terminal board 22 is the longitudinal direction of the indoor unit casing 1 and is the direction from the AC circuit section 23 to the DC low-voltage circuit section 25. By inserting the VVF line 38 in such a direction, the VVF line 38 can be easily inserted and connected, and interference between the VVF line 38 and each of the circuit sections 23, 24, 25, 26 can be prevented. This makes it possible to simplify the line routing work and reduce noise.

Each opening 31 of the electrical component cover 21
31 is the observation window 3 of the front grill 5 as shown in FIG.
2 allows the user to observe from outside. The front panel 5 does not cover the entire front grille 5 as shown in the figure, but exposes a lower portion of the front grille 5 to the outside.

In the air conditioner, as shown in FIG. 12, the dimension “a” of the electrical component unit 14 along the longitudinal direction of the indoor unit casing 1 is equal to that of the indoor unit casing 1.
The electrical component unit 14 is arranged so as to have a length of at least 1/2 or more of the longitudinal dimension LA. The longer the length a of the electrical component unit 14 is, the more preferable it is.
/ 3 or more. Most preferably, the dimension a of the electrical component unit 14 along the longitudinal direction of the indoor unit casing 1 is set to be substantially equal to the longitudinal dimension LA of the indoor unit casing 1. If the maximum length that can constitute the electrical component unit 14 or a length very close to the maximum length can be used, the cross-sectional area can be minimized or nearly minimized, and the degree of freedom in the arrangement position of the electrical component unit 14 can be greatly increased. The improvement of the indoor unit and the drastic reduction of the ventilation resistance make it possible to significantly reduce the size of the indoor unit and significantly improve the air conditioning performance.

In the air conditioner, the electrical component unit 14 includes a terminal board 22, an AC circuit section 23, a DC high voltage circuit section 24, a DC low voltage circuit section 25, and a CPU control section 26.
Are arranged in series along the longitudinal direction of the indoor unit casing 1, so that the electrical component unit 14 has an elongated shape. Therefore, a special space for disposing the electrical component unit 14 is not required on the side portion inside the indoor unit casing 1 as in the related art. Therefore, the longitudinal dimension of the indoor unit can be reduced, and the indoor unit can be made compact. Conversely, if you say this in reverse,
This means that in the indoor unit having the same size as the conventional one, the space for arranging the indoor heat exchanger 4 and the cross flow fan 9 can be increased, so that the air conditioning performance can be improved as compared with the conventional one.

In the above air conditioner, the DC high-voltage circuit section 24
Since the indoor fan drive motor (high-pressure drive actuator) 35 is disposed close to the side, the connection harness is shortened, the configuration can be simplified, and the connection,
Assembly work becomes easy. In addition, since the fan control motor (low-voltage drive actuator) 36 is arranged close to the DC low-voltage circuit section 25 side, the connection harness is further shortened, the configuration can be simplified, and the connection and assembly work can be performed. Becomes easier. Further, the DC high-voltage circuit unit 24 and the DC low-voltage circuit unit 25 are used as unit blocks,
Since they are housed on one printed circuit board 28, 29, maintenance work can be simplified.

In the above-described air conditioner, the electric components 41, 42, and 43 that generate a large amount of heat are arranged above the printed circuit board 28.
The heat radiation of No. 3 can be promoted, and the influence of heat radiation on other electric components can be prevented. Further, the heat radiating hole 45 is opened toward the front side, so that the air circulating on the front side can promote the heat radiation of the electric components 41, 42, 43 having a large amount of self-heating, and Heat dissipation hole 4
5 is opened toward the front side, so that intrusion of drain water can be prevented, and the reliability of the device can be maintained.

In the air conditioner, the insertion direction of the VVF line 38 into the terminal board 22 is the longitudinal direction of the indoor unit casing 1 and goes from the AC circuit section 23 to the DC low voltage circuit section 25. The direction is
By inserting the VVF line 38 in such a direction, the work of inserting and connecting the VVF line 38 can be facilitated, and the VVF line 38 and each of the circuit units 2 can be connected.
Interference with 4, 25, and 26 can be prevented, the line routing work can be facilitated, and noise can be reduced.

In the above-described air conditioner, the electrical component unit 14 is arranged at a position above the outlet 11 and on the front side of the drain pan 13, and this area includes the outlet side and the suction side. This is the part that needs to be left as a dead space in order to prevent short circuits. Since the electrical component unit 14 is arranged in such a region, the space in the indoor unit casing 1 can be more effectively utilized, and as a result, the indoor unit can be made more compact and the air conditioning performance can be further improved. It becomes possible.

In the air conditioner, the electrical component unit 14 is housed in the electrical component case 20 and is covered with the electrical component cover 21. Therefore, the drain pan 13
It is possible to suppress the drain water in the electric component unit 14 from adversely affecting the electric component unit 14, thereby improving the reliability of the electric component unit 14. In addition, it is possible to suppress the water injection for checking the drain drain function at the time of the installation work, or the cleaning agent and the cleaning water at the time of cleaning the indoor heat exchanger 4 from adversely affecting the electric component unit 14. The reliability of the unit 14 can be improved. It should be noted that the shielding mechanism for the drain water is only required to be able to suppress adverse effects such as a short circuit due to the drain water, and it is not always necessary to completely prevent infiltration of the drain water. This includes a measure of omitting any of the covers 21 or simply providing a partition plate. In the air conditioner, if the front panel 7, the front grille 5, and the electrical component cover 21 are removed, the electrical component unit 14 is exposed to the outside. In this state, inspection, replacement, repair, and the like of each electric component can be performed from the front thereof, so that component replacement and maintenance work can be simplified.

In the air conditioner, the electrical component unit 14 is provided with a light-emitting display section 27, which is located at a position where the light-emitting display section 27 can be externally observed through the observation window 32 on the front side of the indoor unit casing 1. The light emitting display unit 27 is integrated with the electrical component unit 14 in this manner.
Is provided, it is not necessary to increase the wiring length of a lead wire or the like for electrically connecting the electrical component unit 14 and the light emitting display unit 27 as in the related art, and the wiring length is significantly increased as compared with the conventional case. In addition to shortening the cost, the cost can be reduced, and the maintenance work can be facilitated by arranging each of the electric components and the light emitting display unit 27 close to each other. Further, since the electrical component unit 14 is housed in the electrical component case 20 and covered with the electrical component cover 21 to form a single unit in a columnar shape, manufacturing and handling are facilitated, and cost reduction can be achieved. At the same time, reliability is improved.

FIG. 10 schematically shows the arrangement of the above circuits. As described above, the respective circuit sections of the terminal board 22, the AC circuit section 23, the DC high-voltage circuit section 24, and the DC low-voltage circuit section 25 are arranged along the longitudinal direction of the indoor unit casing 1. FIG. 11 shows a modified example thereof. FIG. 11 (a) shows a layout suitable for a product having an AC-DC converter outside the machine, and each circuit of a DC high-voltage circuit 24 and a DC low-voltage circuit 25. The unit is arranged along the longitudinal direction of the indoor unit casing 1. FIG. 2B shows a layout suitable for a product that performs step-down by using a transformer or the like. 1 are arranged along the longitudinal direction.

(Modification Example Regarding Shape of Electrical Equipment Unit)
In the air conditioner, the electrical component unit 14 is housed in the electrical component case 20 and covered with the electrical component cover 21 to form a single unit in a columnar shape.
In addition, the handling is easy, the cost is reduced, and the reliability is improved. However, as shown in FIG.
a, 14b, and 14c. Specifically, the electrical component unit 14 is constituted by a plurality of printed boards, and the plurality of printed boards are mounted on the same board and are electrically connected to each other. When the electrical component unit 14 is configured as described above, the electrical component unit 1 may be reduced in size and ease of handling.
4 is preferably formed in a substantially columnar shape as a whole. Further, as shown in FIG. 14, the electrical component unit 14 is configured as a plurality of units 14a, 14b, 14c, and the units 14a, 14b, 14c are also arranged in the longitudinal direction and in a direction intersecting the longitudinal direction ( The air flow direction) may also be shifted from each other. With this configuration, the degree of freedom in selecting the arrangement position can be improved, and appropriate arrangement according to the model can be performed.

The indoor unit of the air conditioner is not limited to a wall-mounted type, but includes various installation types such as a floor-mounted type and a ceiling-mounted type. Therefore, the longitudinal direction may mean the left-right direction when viewed from the user, and may also mean the up-down direction,
Or it may mean the horizontal direction.

[0053]

According to the air conditioner of the first aspect, it is possible to arrange the electrical component units in various spaces as viewed from a cross section orthogonal to the longitudinal direction of the indoor unit casing. The size in the direction can be reduced, and the indoor unit can be made compact. Conversely, if you say this in reverse,
This means that in an indoor unit having the same dimensions as the conventional one, the space for disposing the heat exchanger and the fan can be increased, and therefore, the air conditioning performance can be improved as compared with the conventional one.

The air conditioners of the second to fourth aspects also have the advantage of making the indoor unit compact and improving the air conditioning performance, as in the first aspect of the invention. The circuit configuration of claim 2 is suitable for converting AC to DC and then performing voltage conversion, and the circuit configuration of claim 3 is suitable for a model that performs step-down by a transformer or the like. The circuit configuration is suitable for a model having an AC-DC converter outside the device.

According to the air conditioners of the fifth and sixth aspects, the connection harness is shortened, the configuration can be simplified, and the connection and assembly work is facilitated. The air conditioner according to claim 7 is suitable for the implementation.

According to the air conditioner of the eighth aspect, maintenance work can be facilitated.

In the air conditioner according to the ninth aspect, the length of the indoor unit in the longitudinal direction can be reduced.
Advantages such as downsizing of indoor units and improvement of air conditioning performance can be obtained.

In the air conditioner of the tenth aspect,
The space inside the indoor unit casing can be used more effectively, and as a result, the indoor unit can be made more compact,
Air conditioning performance can be further improved.

In the air conditioner according to the eleventh aspect,
It is possible to promote the heat radiation of each electric component, prevent the influence of the heat radiation on other electric components, and maintain the reliability of the device.

In the air conditioner according to the twelfth aspect,
It is possible to promote the heat radiation of the electric component having a large amount of self-heating, prevent the intrusion of drain water, and maintain the reliability of the device.

According to the air conditioners of the thirteenth and fourteenth aspects, the insertion and connection of the VVF line can be facilitated, and the interference between the VVF line and each of the circuit portions can be prevented. And noise can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a first embodiment of an air conditioner of the present invention.

FIG. 2 is a schematic front view similar to the above showing the first embodiment of the air conditioner of the present invention.

FIG. 3 is a schematic side view showing a first embodiment of the air conditioner of the present invention.

FIG. 4 is a sectional view showing a first embodiment of the air conditioner of the present invention.

FIG. 5 is an exploded perspective view showing the first embodiment of the air conditioner of the present invention.

FIG. 6 is an exploded perspective view of an example of an electrical component unit used in the air conditioner.

FIG. 7 is a schematic plan view of the electrical component unit.

FIG. 8 is a block diagram showing a circuit configuration of the electrical component unit.

FIG. 9 is a cross-sectional view showing a structure near a light-emitting display unit in the electrical component unit.

FIG. 10 is a block diagram showing a circuit configuration of the electrical component unit.

FIG. 11 is a block diagram showing a modified example of the circuit configuration of the electrical component unit.

FIG. 12 is a schematic diagram showing an example of the arrangement of electrical components units of the air conditioner.

FIG. 13 is a schematic diagram showing an arrangement example when the electrical component unit is divided and configured.

FIG. 14 is a schematic diagram showing another example of arrangement when the electrical component unit is divided and configured.

FIG. 15 is a schematic view showing an example of the arrangement of electrical component units in a conventional example.

[Explanation of symbols]

Reference Signs List 1 indoor unit casing 4 indoor heat exchanger 7 front panel 11 outlet 13 drain pan 14 electrical component unit 22 power input unit (terminal board) 23 AC circuit unit 24 DC high-voltage circuit unit 25 DC low-voltage circuit unit 28 printed circuit board 29 printed circuit board 35 High-pressure drive actuator (indoor fan drive motor) 36 Low-pressure drive actuator (flap control motor) 38 VVF line 45 Heat dissipation hole (gap)

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-196991 (JP, A) JP-A-11-118203 (JP, A) JP-A-8-110085 (JP, A) 3818 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 1/00

Claims (14)

(57) [Claims] An electric component unit (14) is arranged in an indoor unit casing (1), and the electric component unit (1) is disposed.
No. 4) is characterized in that a high-voltage circuit section (24) and a low-voltage circuit section (25) are arranged in order from the power input section (22) side along the longitudinal direction of the indoor unit casing (1). Air conditioner. 2. An AC circuit section (23), a DC high voltage circuit section (24), and a DC low voltage circuit section (25) are arranged in this order from the AC power input section (22) side. 1 air conditioner. 3. An AC high-voltage circuit section (23), an AC low-voltage circuit section (23a), and a DC low-voltage circuit section (25) are arranged in this order from the side of the AC power input section (22). Item 1. The air conditioner of Item 1. 4. The air conditioner according to claim 1, wherein a DC high voltage circuit section (24) and a DC low voltage circuit section (25) are arranged in order from the DC power input section side. 5. The indoor unit casing (1), wherein the power input unit (22) is provided on a side where the high-pressure drive actuator (35) is arranged. Any air conditioner. 6. A low-pressure drive actuator (36) is provided on the side of the indoor unit casing (1) opposite to the side on which the high-pressure drive actuator (35) is arranged, and on the side where the low-pressure circuit section (25) is located. The air conditioner according to claim 5, wherein the air conditioner is provided. 7. The high-pressure drive actuator (35).
The air conditioner according to claim 6, wherein is an indoor fan drive motor, and said low-pressure drive actuator is a flap control motor. 8. One printed circuit board (28) in which one or more of the circuit portions (24) and (25) is a unit block.
(29) and a plurality of printed circuit boards (28) (2
The air conditioner according to any one of claims 1 to 7, wherein (9) is arranged side by side in a longitudinal direction of the indoor unit casing (1). 9. The indoor unit casing (1) has a longitudinal dimension of a space in which the electric component unit (14) is arranged.
The air conditioner according to any one of claims 1 to 8, wherein the length of the air conditioner is 1/2 or more of a longitudinal dimension of the air conditioner. 10. The electrical component unit (14) is located at a position above the air outlet (11) of the indoor unit casing (1) and the drain pan (13) of the indoor heat exchanger (4) and the indoor unit casing (1). The air conditioner according to any one of claims 1 to 9, wherein the air conditioner is arranged in a region extending in a lateral direction between the front panel and the front panel (7). 11. The electrical component unit (14), wherein the electrical components (41), (42), and (4) having a large amount of self-generated heat.
The air conditioner according to claim 10, wherein 3) is disposed above the printed circuit board (28). 12. The air conditioner according to claim 10, wherein a heat radiating hole (45) for cooling the electrical component unit (14) is opened toward a front side. 13. The power input section (22) is configured as a terminal board, and the direction of insertion of the VVF line (38) of the terminal board is set to the longitudinal direction of the indoor unit casing (1). The air conditioner according to claim 1. 14. The air conditioner according to claim 13, wherein the insertion direction of the VVF line is a direction from the power input section to the low voltage circuit section.