WO2001016532A1

WO2001016532A1 - Air conditioner

Info

Publication number: WO2001016532A1
Application number: PCT/JP2000/005366
Authority: WO
Inventors: Yuuichi Terada; Hiroshi Masuda; Mikio Ito
Original assignee: Daikin Industries, Ltd.
Priority date: 1999-08-31
Filing date: 2000-08-10
Publication date: 2001-03-08
Also published as: KR20010080343A; KR100385610B1; JP2001065914A; EP1134505A4; JP3259719B2; CN1335922A; HK1042541A1; EP1134505A1; AU747235B2; AU6473900A; CN1162653C; HK1042541B

Abstract

An air conditioner, wherein a terminal board (22), an AC circuit part (23), a DC high-voltage circuit part (24), a DC low-voltage circuit part (25), and a CPU control part (26) are laid out in series along the longitudinal direction of an indoor unit casing (1) so as to form an electrical equipment unit (14) in a slender shape, whereby the size of an indoor heat exchanger can be increased to increase an air conditioning efficiency without increasing the size of a main unit casing or the main unit casing can be formed compact without reducing the size of the indoor heat exchanger.

Description

Description Air Conditioner Technical Field

The present invention relates to an air conditioner, and more particularly to an air conditioner in which an arrangement space for an electrical component unit is improved. Background art

FIG. 15 is a transparent front view showing an indoor unit of a conventional air conditioner. Inside the main body casing 81, there is provided an indoor heat exchanger 82 constituted by connecting the front side heat exchanger and the rear side heat exchanger in an inverted V-shape. A cylindrical cross flow fan 83 is disposed so as to be sandwiched between the inverted V-shaped portions of the indoor heat exchanger 82. 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 driven to rotate, indoor air is drawn in from the front of the indoor heat exchanger 82 and heat is exchanged by the indoor heat exchanger 82. The conditioned air is blown into the room from below.

In the indoor heat exchanger 82, an auxiliary pipe 86 is drawn out from the right side in the figure. 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). After being drawn out from the indoor heat exchanger 82, the auxiliary pipe 86 is disposed on the right side of the indoor heat exchanger 82. The auxiliary pipe 86 is further heat-insulated to form a communication pipe 88, which is arranged from the right side to the left side of the main casing 81 through the back of the main casing 81. I have. 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 hinder the air flow path.

In the indoor unit, an auxiliary pipe 86 drawn from the indoor heat exchanger 82 is disposed on the right side of the indoor heat exchanger 82. And further to the right of this auxiliary pipe 8 6 In addition, an electrical component box 90 is provided. In other words, two spaces that do not directly contribute to the heat exchange, namely the draw-out space for the auxiliary piping 86 and the electrical component box 90 occupy the body casing 81, and the indoor heat exchange 82 for the two spaces. This means that the width must be reduced. 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 installation space limitations and maintenance of installation workability. Therefore, the space that does not directly contribute to heat exchange in the main casing 81 is made as small as possible, and the width of the indoor heat exchanger 82 is increased without increasing the width of the main casing 81, thereby improving air conditioning efficiency. It was desired to improve Disclosure of the invention

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to increase the dimensions of a heat exchanger without increasing the size of a main body casing and to improve air conditioning efficiency. Another object of the present invention is to provide an air conditioner that can make the main body casing compact without reducing the size of the heat exchanger or the size of the heat exchanger.

In order to achieve the above object, an air conditioner according to the present invention is configured by disposing an electrical component unit in an indoor unit casing, and the electrical component unit is provided with a power input along a longitudinal direction of the indoor unit casing. It is characterized in that a high-voltage circuit section and a low-voltage circuit section are arranged in this order from the section side.

According to the air conditioner having the above configuration, since the circuit configuration of the electrical component unit is a serial layout along the longitudinal direction of the indoor unit casing, the electrical component unit has an elongated shape along the longitudinal direction of the indoor unit casing. be able to. Therefore, 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. That is, a special space for arranging electrical components is not required on the side of the indoor unit casing as in the related art. Therefore, the length of the indoor unit in the longitudinal direction can be reduced, and the indoor unit can be made compact. Conversely, in the case of an indoor unit having the same dimensions as the conventional one, the arrangement space of the heat exchanger and the fan is small. This means that the air conditioning performance can be improved compared to the past.

Further, the air conditioner of one embodiment is characterized in that an AC circuit unit, a DC high-voltage circuit unit, and a DC low-voltage circuit unit are arranged in this order from the AC power input unit side.

Also in the air conditioner of the above embodiment, the advantages of making the indoor unit compact and improving the air conditioning performance can be obtained. This circuit configuration is suitable for the case where voltage is converted after converting AC into DC.

Further, the air conditioner of one embodiment is characterized in that an AC high-voltage circuit section, an AC low-voltage circuit section, and a DC low-voltage circuit section are arranged in this order from the AC power input section. Also in the air conditioner of the above embodiment, the advantages of making the indoor unit compact and improving the air conditioning performance can be obtained. This circuit configuration is suitable for a model that performs step-down by a transformer or the like.

Further, the air conditioner of one embodiment is characterized in that a DC high-voltage circuit unit and a DC low-voltage circuit unit are arranged in order from the DC power input unit side.

Also in the air conditioner of the above embodiment, the advantages of making the indoor unit compact and improving the air conditioning performance can be obtained. This circuit configuration is suitable for a model having an AC-DC converter outside the device.

Moreover, the air conditioner of one embodiment is characterized in that the power input unit is provided on the side of the indoor unit casing where the high-voltage drive actuator is arranged.

According to the air conditioner of the above embodiment, since the high-voltage drive actuator is arranged close to the high-voltage circuit section side, the connection harness is shortened, the configuration can be simplified, and the connection and assembly can be performed. Work becomes easy.

Further, in the air conditioner of another embodiment, in the above-described embodiment, the low-pressure drive is provided on the side where the high-voltage drive actuator is disposed in the indoor unit casing and on the side where the low-voltage circuit is located. It is characterized by having an actuator.

According to the air conditioner of the above other embodiment, the low-voltage drive actuator is arranged close to the low-voltage circuit unit side, so that the connection harness is further shortened, and The structure can be simplified, and the connection and assembly work becomes easier.

An air conditioner according to another embodiment is characterized in that, in the above embodiment, the high-pressure drive actuator is an indoor fan drive motor, and the low-pressure drive actuator is a flap control motor. However, this air conditioner is suitable for the implementation.

In one embodiment, one or more of the circuit units are housed in a single printed circuit board as a unit block, and a plurality of printed circuit boards are arranged side by side in the longitudinal direction of the indoor unit casing. Features.

According to the air conditioner of the above embodiment, since one or a plurality of circuit units are housed in a single printed circuit board as a unit block, maintenance work can be facilitated. Further, the air conditioner of one embodiment is characterized in that the longitudinal dimension of the space in which the electrical component unit is arranged is at least 1 Z2 of the longitudinal dimension of the indoor unit casing.

In the air conditioner of the above embodiment, the electric component cutout is formed in an elongated shape along the longitudinal direction of the indoor unit casing, so that various types of cross sections orthogonal to the longitudinal direction of the indoor unit casing are provided. It is possible to arrange the electrical components in the space, which makes it possible to reduce the length of the indoor unit in the longitudinal direction, and also has the advantage of making the indoor unit compact and improving the air conditioning performance.

Further, in the air conditioner of one embodiment, the electrical component unit may be arranged at a position above the air outlet of the indoor unit casing and in a lateral direction located between a drain pan of the indoor heat exchanger 4 and a front panel of the indoor unit casing. It is characterized in that it is arranged in a region extending in the direction.

When a drain pan is provided below the indoor heat exchanger 4 in a region located above the air outlet of the indoor unit as in the air conditioner of the above embodiment, the drain pan and the indoor unit casing The position between the front panel and the front panel is an area that is definitely dead space. Therefore, by arranging the electrical component unit in this area, the space in the indoor unit casing 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 Becomes

An air conditioner according to another embodiment is the air conditioner according to the above embodiment, It is characterized in that electrical component panels that generate a large amount of self-heating are arranged above the printed circuit board.

In the air conditioner of the above other embodiment, since the electric component panel having a large amount of self-heating is arranged at a position above the printed circuit board, the heat radiation of each electric component panel can be promoted, and It is possible to prevent electric components from being affected by heat radiation. Further, the air conditioner of one embodiment is characterized in that a heat radiating hole for cooling the electrical component unit is opened toward the front side.

In the air conditioner of the above embodiment, the heat radiation hole is opened toward the front side, whereby the air flowing through the front side can promote the heat radiation of the electric component panel having a large amount of self-heating. is there. In addition, since the heat radiating holes are open to the front side, the ingress of drain water is prevented and the reliability of the equipment can be maintained.

Further, the air conditioner of one embodiment is characterized in that the power input section is configured as a terminal board, and the insertion direction of the VVF line of the terminal board is set as the longitudinal direction of the indoor unit casing.

Further, the air conditioner of one embodiment is characterized in that the insertion direction of the VVF line is a direction from the power input unit to the low-voltage circuit unit.

In the air conditioner of the above embodiment, the insertion direction of the VVF line into the terminal board is the longitudinal direction of the indoor unit casing and the direction from the AC circuit section to the DC low-pressure circuit section. By inserting the VVF line in such a direction, the VVF line can be easily inserted and connected, and the interference between the VVF line and each of the above circuits can be prevented. And noise can be reduced. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic front view showing a first embodiment of the 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 electric component unit.

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

FIG. 9 is a cross-sectional view showing a structure near a light emitting display unit in the electric 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 modification of the circuit configuration of the electrical component unit. FIG. 12 is a schematic diagram showing an example of the arrangement of the electrical component units of the air conditioner. FIG. 13 is a schematic diagram showing an arrangement example when the electric 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 diagram showing an example of arrangement of electrical component units in a conventional example. 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 consisting of an outdoor unit and an indoor unit, and the following description will be made for a wall-mounted indoor unit.

(First Embodiment)

First, the internal structure will be described with reference to FIGS. 3, 4, and 5. First, as shown in Fig. 5, the indoor unit casing 1 of the indoor unit consists of a main unit casing 1a on which the main components such as the indoor heat exchanger 4, cross flow fan 9, and electrical component unit 14 are attached. And a front grille 5 attached to the front of the body casing 1a, and a front panel 7 attached to the front of the front grille 5 as a whole. It has been done. Of these, the front panel 7 can be removed by the user arbitrarily. The 1a and the front Darinole 5 are not removable by the user. As shown in Figs. 3 and 4, a plate-fin type indoor heat exchange system in which the front heat exchanger 2 and the rear heat exchanger 3 are arranged in an inverted V-shape in the indoor unit casing 1 described above. Instrument 4 is located. 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 making the ceiling of the front grille 5 into a lattice shape, and the front side suction port 8 has an upward opening at the center of It is formed by extending. A cross flow fan 9 is provided inside the inverted V shape of the indoor heat exchanger 4. The cross flow fan 9 is called an axial fan, and is arranged so 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 opening 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 in a body with a drain pan 13 located at a lower part of the front heat exchanger 2, and is located at an upper part of the outlet 11, An electrical component unit 14 is disposed at a position on the front side of the drain pan 13, that is, between the drain pan 13 and the front panel 7. The rear side drain pan 15 is arranged.

The indoor unit itself and the indoor unit casing 1 are horizontally elongated as shown in FIGS. 1 and 2, and the front intake port 8 and the air outlet 11 are disposed in the longitudinal direction of the indoor unit casing 1 (lateral direction). ). The electrical component unit 14 is located at a position above the outlet 11 and at a position in front of the drain pan 13 as shown in FIG. 1 and FIG. The casing 1 is configured to extend in the lateral direction along the longitudinal direction.

The specific structure of the electrical component unit 14 will be described with reference to FIGS. 6, 7, and 8. FIG. In FIG. 6, reference numeral 20 denotes an electrical component case for accommodating the electrical component unit 14, 21 denotes an electrical component cover for covering the electrical component unit 14, and the electrical component unit 14 is located between the two 20 and 21. Is arranged. As shown in Fig. 8, the electrical component unit 14 is connected to a commercial power source (AC 100 V or AC 200 V) as a power input terminal. Panel 22, AC circuit 23, DC high-voltage circuit 24, DC low-voltage circuit 25, CPU control 26, and light-emitting display 27, as shown in Figs. 6 and 7, The DC high voltage circuit section 24 is mounted on the first printed circuit board 28, the DC low voltage circuit section 25 is mounted on the second printed circuit board 29, and the light emitting display section 27 is mounted on the display board 30. It has been. 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 are arranged from right to left in the figure. Along with this, it is arranged in a state of being laid out in series along the longitudinal direction of the indoor unit casing 1 and attached to the electrical component case 20. The display substrate 30 is attached to the back side of the electrical component cover 21. In this state, the electrical component case 21 is covered with the electrical component cover 21. The electrical component cover 21 has openings 3 1 and 3 1 at corresponding positions so that the LEDs of the light-emitting display section 27 and 7-segment LEDs (light-emitting display means) can be externally observed. ing.

In the electrical component unit 14, the first printed circuit board 28, the second printed circuit board 29, and the display board 30 are all formed as long as possible in order to form the entirety horizontally. I have. The first 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 a SW transformer 41, a rectifier diode 42, and a primary-side SW element 43 are used. The electric components 41, 42, 43 generating much heat are arranged above the first printed circuit board 28 extending in the vertical direction as shown in FIG. 43 In addition to promoting heat radiation, it also prevents other electric components from being affected by heat radiation. The electrical component unit 14 is housed in the electrical component case 20 and covered by the electrical component cover 21 as described above, but the upper part of the electrical component case 20 and the upper part of the electrical component cover 21 are also covered. A gap (portion indicated by reference numeral 45 in FIG. 7) is provided as a heat radiating hole, and this gap is opened toward the front side, whereby air flowing through the front side generates self-heating. The aim is to promote the heat radiation of many electrical components 41, 42, 43. In addition, opening the heat radiation hole toward the front side prevents ingress of drain water and maintains the reliability of the equipment. In the above air conditioner, a DCP WM type indoor fan drive motor that drives the cross flow fan 9 is on the right side in Fig. 1 and a flap control motor (stepping motor) that drives and controls the horizontal flap. The power is supplied to the indoor fan drive motor 35 from the DC high-voltage circuit section 24, as shown in Fig. 8, and the flap control motor 3 Power is supplied to DC 6 from DC low voltage circuit section 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 as a high-voltage drive actuator is arranged. By arranging the motor 35 on the right side and the flap control motor 36 as a low-voltage drive actuator on the left side, each circuit section 24, 25 and each actuator 36 are arranged as close as possible. -ing

Also, as shown in FIG. 8, the indoor unit is connected to the outdoor unit 37, and this connection is made by the VVF line 38. this ? The line 38 is composed of a pair of AC lines for power supply and a transmission line for internal / external transmission. A VVF line 38 as an internal / external connection line is connected to the terminal board 22. It can be inserted and connected from the right side in FIGS. 6 and 7. That is, the insertion direction of the VVF line 38 into the terminal board 22 is the longitudinal direction of the indoor unit casing 1 and the direction from the AC circuit section 23 to the DC low voltage circuit section 25. ing. By inserting the VVF line 38 in such a direction, the insertion and connection work of the VVF line 38 can be facilitated, and the VVF line 38 and the above-mentioned circuit sections 23, 24, and 2 Interference with 5, 26 can be prevented, making it easier to route lines and reducing noise.

Then, as shown in FIG. 9, the openings 3 1, 31 of the electrical component cover 21 are formed so that a user can observe them from the outside through the observation window 32 of the front linole 5. As shown in the figure, the front panel 5 does not cover the whole of the front grill 5 but exposes a lower portion of the front grill 5 to the outside.

In the air conditioner, as shown in FIG. 12, the dimension a along the longitudinal direction of the indoor unit casing 1 of the electrical component unit 14 is at least one of the longitudinal dimensions LA of the indoor unit casing 1. Electrical unit so that the length is at least 1/2 Is arranged. The length a of the electrical component unit 14 is preferably as long as possible. Accordingly, the length a of the indoor unit casing 1 should be at least two to three or more of the longitudinal dimension LA. 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 the length that is very close to the maximum, the cross-sectional area can be minimized or minimized, and the position of the electrical component unit 14 can be determined. By greatly improving the degree of freedom and greatly reducing ventilation resistance, it is possible to significantly reduce the size of indoor units and significantly improve 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. Since the electrical component unit 14 is formed by laying out in series along the longitudinal direction of the machine casing 1, 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 of the indoor unit casing 1 as in the conventional case. Therefore, the length of the indoor unit in the longitudinal direction can be reduced, and the indoor unit can be made compact. Conversely, in other words, in the indoor unit of the same size as the conventional one, the space for installing the indoor heat exchanger 4 and the cross flow fan 9 can be increased, so that the air conditioning performance is improved compared to the conventional one. It becomes possible to do.

In the above air conditioner, the indoor fan drive motor

(High-voltage drive actuator) Since 35 is arranged, the connection harness is shortened, the configuration can be simplified, and the connection and 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, the connection harness is further shortened, and the configuration can be simplified. , Connection and assembly work becomes easier. Further, since the DC high-voltage circuit section 24 and the DC low-voltage circuit section 25 are housed in one printed circuit board 28, 29 as a unit block, maintenance work can be simplified.

In the above air conditioner, the electric components 41, 42, 43 generating a large amount of self-heating are arranged above the printed circuit board 28, so that each of the electric components 41, 42, 43 is disposed. Heat dissipation can be promoted, and the effect of heat dissipation on other electrical components can be prevented. In addition, the heat radiating holes 45 are 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 large self-heating. It is possible, and since the heat radiating holes 45 are open to the front side, the intrusion of drain water can be prevented, and the reliability of the equipment can be maintained.

In the air conditioner, the insertion direction of the VVF line 38 into the terminal board 22 is in the longitudinal direction of the indoor unit casing 1 and from the AC circuit section 23 to the DC low-pressure circuit section 25. By inserting the VVF line 38 in such a direction, the insertion of the line 38 and the connection work can be facilitated, and the VVF line 38 and the above Interference with each of the circuit sections 24, 25, and 26 can be prevented, the line routing work can be simplified, and noise can be reduced.

In the air conditioner described above, the electrical component unit 14 is disposed at a position above the outlet 11 and in front of the drain pan 13, and this region 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 an area, the space in the indoor unit casing 1 can be used more effectively, 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, it is possible to suppress the drain water in the drain pan 13 from adversely affecting the electrical component unit 14, thereby improving the reliability of the electrical component unit 14. In addition, it is possible to suppress water injection for checking the drain drainage function during installation work, or to prevent the cleaning agent and washing water when cleaning the indoor heat exchanger 4 from adversely affecting the electrical component unit 14. The reliability of the product unit 14 can be improved. The shielding mechanism for the drain water only needs to be able to suppress the adverse effects such as a short circuit caused by the drain water. It is not always necessary to completely block the infiltration of the drain water. This includes measures such as omitting one of 0 and the electrical component cover 21 or simply providing a partition plate. And in the above air conditioner, the front panel 7. If the front grille 5 and the electrical component cover 21 are removed, the electrical component unit 14 will be exposed to the outside. In this state, inspection, replacement, repair, and the like of each electrical component can be performed from the front, so that component replacement and maintenance work can be simplified.

In the air conditioner, a light-emitting display 27 is provided on the electrical component unit 14, and the light-emitting display 27 can be observed from outside through the observation window 32 on the front side of the indoor unit casing 1. Although the light emitting display unit 27 is provided integrally with the electrical component unit 14 as described above, the electrical component unit 14 and the light emitting display unit 27 are electrically connected to each other. It is not necessary to increase the wiring length of the lead wires and the like for connection to the conventional equipment, and the wiring length can be significantly reduced compared to the conventional equipment, reducing costs and reducing the number of electrical components and the light emitting display 2 By arranging 7 in close proximity, maintenance work can be facilitated. Furthermore, 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 simplified. In addition to reducing costs, reliability is also improved.

FIG. 10 schematically shows the arrangement state of each circuit. As described above, 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 an example of the modification. Fig. 11 (a) shows a layout suitable for a product having an AC-DC converter outside the machine. DC high-voltage circuit 24, DC low-voltage circuit 2 5 are arranged along the longitudinal direction of the indoor unit casing 1. Figure (b) shows a layout suitable for a product that performs step-down by a transformer or the like. Each of the terminal board 22, AC high-voltage circuit 23, AC low-voltage circuit 23a, and DC low-voltage circuit 25 The circuit section is arranged along the longitudinal direction of the indoor unit casing 1.

(Example of change regarding the shape of electrical component unit)

In the above 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, and the manufacturing and handling are performed. Although it is easy, cost reduction and reliability are improved, as shown in Fig. 13, multiple units 14a, 14b in which electrical component units 14 are arranged in a substantially straight line , Which may be configured as 14c. Specifically, multiple pre- The electrical component unit 14 is composed of a printed circuit board, and the plurality of printed circuit 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 14 is preferably formed in a substantially columnar shape as a whole from the viewpoint of compactness and easy handling. As shown in Fig. 14, the electrical component unit 14 is configured as a plurality of units 14a, 14b, and 14c, and each unit 14a, 14b, and 14c is a longitudinal unit. They may be arranged so as to be shifted from each other in the direction and also in the direction (air flow direction) crossing the longitudinal direction. 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, and includes various installation forms such as a floor-standing 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 the horizontal direction.

Claims

The scope of the claims

1. The electrical component unit (14) is arranged inside the indoor unit casing (1). The electrical component unit (14) extends along the longitudinal direction of the indoor unit casing (1). An air conditioner comprising a high-voltage circuit section (24) and a low-voltage circuit section (25) arranged in this order from the side.

2. The air according to claim 1, wherein an AC circuit section (23), a DC high voltage circuit section (24), and a DC low voltage circuit section (25) are arranged in order from the AC power input section (22). Harmony machine.

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 AC power input section (22). 1, air conditioner.

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.

5. The air according to claim 1, wherein the power input section (22) is provided on a side of the indoor unit casing (1) where the high-pressure drive actuator (35) is arranged. Harmony machine.

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 located, and on the side where the low-pressure circuit section (25) is located. The air conditioner according to claim 5, wherein:

7. The air conditioner according to claim 6, wherein the high-pressure drive actuator (35) is an indoor fan drive motor, and the low-pressure drive actuator (36) is a flap control motor.

8. One or more of the above circuit parts (24) and (25) are housed in a single printed circuit board (28) (29) as a unit block, and a plurality of printed circuit boards (28) (29) are The air conditioner according to any one of claims 1 to 7, wherein the air conditioner is arranged side by side in the longitudinal direction of (1).

9. The longitudinal dimension of the space in which the electrical component unit (14) is arranged is at least 12 times the longitudinal dimension of the indoor unit casing (1). Any of the air conditioners.

10. The electrical component unit (14) is located above the air outlet (1 1) 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 disposed in a region extending in a lateral direction between the front panel (7) and the front panel (7).

1 1. Claims characterized in that, in the electrical component unit (14), the electrical components (4 1) (42) (43) generating a large amount of self-heating are arranged above the printed circuit board (28). Item 10. Air conditioner.

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 unit (22) is configured as a terminal board, and the insertion direction 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 any one of claims 1 to 12.

14. The air conditioner according to claim 13, wherein an input direction of the VVF line (38) is a direction toward the power input section (22) and a low voltage circuit section (25).