JP2983872B2 - Air conditioner indoor unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner, and more particularly to a fan motor for rotating a cross flow fan for blowing heat-exchanged air from an outlet,
The present invention relates to a mechanism for air-cooling an electrical component room in which electrical components are provided.

[0002]

2. Description of the Related Art In an indoor unit of an air conditioner which is an example of a conventional air conditioner, as shown in FIGS.
A suction port 2 for indoor air provided in a front case 1a attached to the front of the evaporator 3, an evaporator 3 as a heat exchanger for exchanging heat with the drawn indoor air, and a suction port 2 provided below the suction port 2. A heat exchange chamber 5 having an outlet 4 for blowing out the heat-exchanged air is formed.

[0003] A cross flow fan 6 is provided in the heat exchange chamber 5.
After the air in the room is sucked through the suction port 2, it is cooled by passing through the evaporator 3, and the cooled air is blown into the room from the outlet 4.

In FIG. 1, reference numeral 7 designates a cooling air outlet 7 which is disposed inside the main body 1 so as to face the rear of the evaporator 3.
The cross flow fan 6 is provided in the air passage R so as to partition the air passage R for guiding the air flow with the evaporator 3.
Reference numeral 8 denotes a first air flow direction changing plate provided in the air outlet 4 for changing the left-right blowing direction of the discharged air, and 8a a second air flow direction changing plate for changing the vertical blowing direction.

On the other hand, as shown in FIG. 6, one side of the main body 1 is adjacent to the heat exchange chamber 5 and has a rotating shaft 9a.
The fan 10 is provided with a fan motor 9 for rotating the cross flow fan 6 and a control unit for controlling the driving of the fan motor 9, and a motor 10 for starting the motor. Power transistor 1
An electrical compartment 11 in which electrical components such as 0a are disposed is partitioned by a partition plate 12.

[0006]

Recently, there has been an increasing demand for a small and high-output indoor unit. To realize such an indoor unit, a small and large-output fan motor 9 is required.
However, in order to drive such a fan motor 9, a large current needs to flow through the fan motor 9. However, when such a large current is supplied to the fan motor 9, the amount of heat generated by the fan motor 9 increases and the temperature of the electrical equipment room 11 increases.

Here, if the temperature of the electrical equipment room 11 rises as described above, there is a possibility that electrical components such as the substrate 10 may malfunction, so it is necessary to cool the electrical equipment room 11.
In the conventional indoor unit, cooling in the electrical equipment room 11 is performed by natural convection through, for example, a ventilation hole 11a formed in a predetermined portion of the rear case 1b of the main body 1, so that the electrical equipment room 11 is sufficiently cooled. There was a problem that it was not possible.

In order to solve this problem, the electrical equipment room 1
It is conceivable to cool the inside of the electrical equipment room 11 by separately arranging a cooling fan exclusively for cooling in the inside 1 to forcibly generate a flow of air. However, in such a case, the cooling fan Since a space for arranging the components is required, the electrical equipment room 11 is widened, and not only the size of the main body 1 is increased, but also other problems such as complicated wiring are caused.

Accordingly, the present invention has been made to solve such a problem, and an indoor unit of an air conditioner capable of cooling an electrical equipment room without using a special part for cooling. The purpose is to provide.

[0010]

According to a first aspect of the present invention, there is provided a main body having a suction port for sucking air in a room and an air outlet for exchanging heat with the sucked air to blow out the room. A heat exchange chamber in the main body in which a heat exchanger for heating / cooling room air is provided, and a heat exchanger provided in the heat exchange chamber.
Cross-floor for blowing out the heat exchanged air into the room
Low fan and, Bei and the heat exchange chamber and the partition formed by providing a machine room adjacent to the heat exchange chamber to one side of the inside of the body
And the drive of the cross flow fan extending into the electrical equipment room.
A centrifugal blower for stirring the air in the electrical equipment room is attached to the driving shaft, while the cross flow fan is attached to the drive shaft.
Fan motor for rotating the drive shaft of the fan
Partially enter the inside of the core fan
It has been assembled .

According to the second aspect of the present invention, there is provided a main body having a suction port for sucking indoor air and an outlet for exchanging heat with the sucked air to blow out the room, and heating / cooling the drawn indoor air. A heat exchange chamber in the main body in which a heat exchanger to be disposed is provided; a cross flow fan provided in the heat exchange chamber for blowing out heat-exchanged air into the room; and a cross flow fan adjacent to the heat exchange chamber. The heat exchange chamber is provided on one side inside the main body with an electric equipment room formed as a partition, and the drive shaft of the cross flow fan extending to the electric equipment room is used to stir the air in the electric equipment room. Rotating the drive shaft of the cross flow fan while the centrifugal blower is attached
A fan motor for driving the centrifugal fan
Partially enter the inside, and
Fan motor for rotating the drive shaft of the motor
It is attached and fixed to a chassis incorporated in the.

[0012] The invention according to claim 3, the fan motor for rotating the drive shaft of the cross flow fan intruded part inside the centrifugal blower fan, and the
A fan for rotating the drive shaft of the cross flow fan
Motor is mounted on the chassis incorporated in the electrical room.
In addition, the centrifugal fan is located inside the electrical equipment room.
It is located near the center .

According to a fourth aspect of the present invention, indoor air is sucked.
Heat is exchanged between the suction port and the sucked air and blown out into the room.
Body with the air outlet formed, and the sucked indoor air
Inside the main body where a heat exchanger for heating / cooling the air is provided
Heat exchange chamber, and provided in the heat exchange chamber, heat exchanged
Cross flow fan to blow air into the room
The heat exchange is provided on one side inside the main body adjacent to the heat exchange chamber.
And a machine room provided in the chamber and the partition formed on the drive shaft of the cross flow fan extending in the machine room, the electrostatic
Centrifugal blower fan is mounted et the stirring instrumentation room air
And the suction port of the centrifugal fan is
It is formed as an annular opening surrounding the motor
In order to rotate the drive shaft of the cross flow fan,
Fan motor is mounted on a chassis built in the electrical room.
Therefore, it is fixed near the central part of the electrical equipment room space.

[0014]

According to the first aspect of the present invention, indoor air is drawn in from a suction port by a cross flow fan provided in a heat exchange chamber formed inside a main body, and air after heat exchange by a heat exchanger is blown out. So that it blows out. Also,
An electrical compartment is formed on one side of the main body so as to be adjacent to the heat exchange compartment. By providing a centrifugal blower fan on the drive shaft of the crossflow fan that extends into the electrical equipment room, external air for cooling is sucked into the electrical equipment room by the centrifugal blower fan. In addition, a fan motor for rotating and driving the cross flow fan is disposed in the electrical equipment room, and the fan motor is assembled so that a part of the fan motor is inserted into the centrifugal blower fan. The air can be cooled more powerfully by the air drawn into the blower fan.

According to the second aspect of the present invention, indoor air is drawn in from a suction port by a cross flow fan provided in a heat exchange chamber formed inside the main body, and air after heat exchange by the heat exchanger is blown out. So that it blows out. Further, the electrical equipment room is formed on one side of the main body so as to be partitioned adjacent to the heat exchange chamber. By providing a centrifugal blower fan on the drive shaft of the crossflow fan that extends into the electrical equipment room, external air for cooling is sucked into the electrical equipment room by the centrifugal blower fan. Also,
Power the fan motor to rotate the sflow fan.
And the centrifugal fan
Assemble part of the fan inside
The fan motor is drawn into the centrifugal fan
It can be cooled strongly by the air. In addition, the fan motor
Attached and fixed to the chassis incorporated in the electrical equipment room
Therefore, when the fan motor is cooled as described above,
The chassis cools down, and the temperature in the electrical equipment room decreases.
It is.

According to the third aspect of the present invention, the first and second aspects of the present invention are provided.
The centrifugal blower fan of the second invention is attached to the center of the electrical equipment room space.
Claim 1 and Claim 1 described above by being located close to each other.
In addition to the function of item 2, the electrical components are not biased into the electrical room
It can be evenly distributed around the centrifugal fan,
Effective use of space in the electrical equipment room and wind from the blower fan
So that it can be applied evenly to any electrical components in the electrical equipment room
Become.

According to the fourth aspect of the present invention, the indoor air is sucked from the suction port by the cross flow fan provided in the heat exchange chamber formed inside the main body, and the air after the heat exchange by the heat exchanger is blown out. So that it blows out. Further, the electrical equipment room is formed on one side of the main body so as to be partitioned adjacent to the heat exchange chamber. By providing a centrifugal blower fan on the rotating shaft of the crossflow fan that extends into the electrical equipment room, external air for cooling is sucked into the electrical equipment room by the centrifugal blower fan. Furthermore, far
The suction port of the core type fan surrounds the fan motor
By forming it as an annular opening, the air
The motor flows around the peripheral surface of the motor and
The fan motor is driven by a chassis
As a result, the electrical components are fixed near the center of the electrical room , so that the electrical components are not biased into the electrical room.
Can be evenly distributed around the
When the fan motor cools down, the chassis cools down,
The temperature in the electrical compartment will also drop.

[0018]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of an essential part of an indoor unit of an air conditioner which is an example of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a simplified structural diagram for better explaining the configuration of FIG. FIG. 3 is an external perspective view of the blower of the present invention employed in the indoor unit. Note that, in FIGS. 1, 2, and 3, the same reference numerals as those in FIGS.

In FIG. 1, a cross 13 is disposed in the air passage R so as to be rotatable in the lateral direction, sucks room air from the suction port 2, and blows out the air exchanged by the evaporator 3 from the blowout port 4. It is a flow fan.

Here, according to the present invention, the cross flow fan 13 is a blower 15 having a structure in which a centrifugal blower fan 14 having a structure different from that of the cross flow fan 13 is formed at one end thereof. The blower 15 has a cross flow fan 13 in the heat exchange chamber 5 and a centrifugal fan 14 in the electrical equipment room 11.
It is arranged so as to extend over both the heat exchange chamber 5 and the electrical equipment room 11 and is incorporated in the indoor unit 1. That is, the centrifugal blower fan 14 is attached to the drive shaft 16 of the crossflow fan 13 that extends into the electrical equipment room 11. Reference numeral 9 denotes an electric device for rotating and driving the cross flow fan 13 and the centrifugal blower fan 14, that is, a fan motor, which is mounted and fixed in the electric equipment room 11 by a chassis 21.

The cross flow fan 13 has an elongated cylindrical shape formed by arranging a large number of elongated blades 17 having a curved shape at regular intervals as can be understood from FIG. The cross flow fan 13 is housed in a fan case having a suction port on one side and an air outlet on the other side, and is rotated. Then, as shown by an arrow A in FIG. 2, air is sucked into the hollow portion between the blades 17 and then blown out from between the blades 17.

Here, the shape of the air passage R in which the cross flow fan 13 is provided is formed so that the upper portion of the cross flow fan 13 is wider than the lower portion (see FIG. 5). When the flow fan 13 rotates, the air after the heat exchange above it is sucked and blown downward.

On the other hand, the centrifugal fan 14 is a short cylindrical fan formed by arranging a large number of plate-shaped fins 19 at regular intervals in a circumferential direction, and having a shape with both sides opened. When the centrifugal blower fan 14 is housed in a fan case having a shape in which only one side opening is a suction port and rotated, air is sucked in the axial flow direction as shown by arrow B in FIG. In this structure, the sucked air is directed in the centrifugal direction and can be radially blown out from between the fins 19.

When the blower 15 having such a configuration is adopted and the blower 15 is driven to rotate by the fan motor 9 provided in the electrical equipment room 11, the cross flow fan 13 rotating in the air passage R converts the indoor air into air. After being sucked through the suction port 2, it is cooled by passing through the evaporator 4, and thereafter, cool air or warm air is blown into the room from an air outlet 5 formed below the air suction port 2, and air conditioning in the room is achieved. It can be done smoothly.

On the other hand, the centrifugal blower fan 14 rotating in the electrical equipment room 11 sucks the air in the electrical equipment room 11 from the side opening toward the center of the fan, and then discharges the sucked air out of the center to the fins 19. The air is blown from the space between the fins 19 and the fins 19 so as to blow out from the blow-out opening 21 to the peripheral direction.

As a result, an airflow is generated in the electrical equipment room 11 that circulates more strongly than in the case where air is cooled by natural ventilation only through the conventional ventilation port 11a, so that a large amount of external air can be taken into the electrical equipment room 11 and ventilated. As a result, the electrical components such as the substrate 10 and the power transistor 10a can be sufficiently cooled, and the temperature in the electrical component room 11 can be reduced without using special components such as a cooling fan. Become like

Also, the fan motor 9 is cooled by the circulating air flow generated in the electrical equipment room 11. In this case, in this embodiment, the fan motor 9 is partially cooled as shown in FIG. The fan 14 is inserted into the hollow portion of the fan 14, attached to and fixed to the chassis 21, and incorporated into the electrical equipment room 11.

As described above, when a part of the fan motor 9 is mounted so as to enter the centrifugal blower fan 14, the air suction port becomes an annular opening surrounding the fan motor 9,
With this annular air inlet 22, the air flows through the peripheral surface of the fan motor 9 and is taken in, so that the fan motor 9 is more reliably cooled.

The thus formed annular air suction port 2
2 has a smaller opening area than the air suction port whose side surface is completely open when the fan motor 9 is provided apart from the side of the centrifugal blower fan 14,
The air suction speed is increased and the wind hits the surface of the fan motor strongly, so that the cooling effect is further enhanced.

When the fan motor 9 is cooled in this way, the chassis 21 to which the fan motor 9 is fixed also cools down, so that the temperature in the electrical equipment room 11 also drops.

In addition, by incorporating a part of the fan motor 9 into the centrifugal blower fan 14, the width of the electrical equipment room 11 can be reduced as compared with the case where the fan motor 9 is arranged beside the centrifugal blower fan 14. Therefore, the width of the main body 1 can be reduced, and the indoor unit can be made compact.

By the way, when the centrifugal blower fan 14 provided on one side of the cross flow fan 13 rotates, the electric equipment room 1 is rotated.
1, air is blown from the center to the centrifugal direction, and the centrifugal blower fan 14 can direct the air in all directions. .

Therefore, in the present embodiment, the cross flow fan 13 is provided in the heat exchange chamber 5 so that the centrifugal blower fan 14 is located at the center of the space inside the electrical equipment room 11, whereby the electrical components are provided. It can be evenly arranged around the centrifugal blower fan 14 without being biased in the electrical equipment room 11, so that the space in the electrical equipment room 11 can be effectively used and the electrical components can be efficiently mounted, and the centrifugal blower fan can be installed. The wind blown out from 14 can be evenly applied to any of the electrical components, so that the electrical components in the electrical component room 11 can be cooled more efficiently and reliably.

Further, the centrifugal fan 14 is connected to the electrical equipment room 11.
When it is located in the center of the internal space, the surroundings of the fan are sufficiently open, so that the blowing of the wind is not biased and does not create a turbulent flow in the electrical equipment room 11; Since the air enters smoothly through the ventilation port 11a, the air flow uniformly circulates in the electrical equipment room 11, and the electrical components in the electrical equipment room 11 can be cooled more efficiently.

Next, the cooling operation of the electrical equipment room in the indoor unit of the air conditioner configured as described above will be described.

When the blower 15 is operated and the cross flow fan 13 rotates, the air after heat exchange in the upper part of the heat exchange chamber 5 is sucked and blown downward. On the other hand, apart from the airflow in the heat exchange chamber 5, on the electric equipment room 11 side, the rotation of the centrifugal blower fan 14 integrated with the cross flow fan 13 causes the air in the electric equipment room 11 to flow axially of the fan 14. Then, the sucked air is blown out in the centrifugal direction to generate an air flow, and the air in the electrical equipment room 11 is agitated. The air is forcibly taken in from the opening 11a and the air is blown, so that the inside of the electrical equipment room 11 is efficiently cooled.

The air heated by cooling the electrical components by the air blow does not enter the heat exchange chamber 5 because the electrical equipment chamber 11 is not communicated with the heat exchange chamber 5 by the partition plate 12, and the cold air in the heat exchange chamber 5 is cooled. Or have no thermal effect on warm air.

Further, in the electric equipment room 11, the air sucked by the centrifugal blower fan 14 flows along the surface of the fan motor 9 incorporated so as to enter the hollow portion of the fan. Thus, the fan motor 9 is more reliably cooled. Further, the fan motor 9
Is cooled, the chassis 21 to which the fan motor 9 is fixed next also cools down, so that the temperature in the electrical equipment room 11 also falls.

As described above, the centrifugal blower fan 1 is attached to the rotating shaft 16 of the cross flow fan 13 extending into the electrical equipment room 11.
4, if the cross flow fan 13 is rotated, air is taken in from the outside into the electrical equipment room 11,
The air can be forcibly blown, and the inside of the electrical equipment room 11 can be effectively cooled.

[0041]

As described above, according to the first aspect of the present invention,
The centrifugal blower fan attached to the drive shaft of the cross flow fan that extends into the electrical equipment room circulates air in the electrical equipment room. Air can be blown up to ensure that the electrical equipment room is cooled. In addition, by installing a fan motor that rotationally drives the cross flow fan so as to partially enter the inside of the centrifugal blower fan, the fan motor is cooled by axial air sucked into the centrifugal blower fan. Therefore, the life of the fan motor can be extended, and the fan motor can be further downsized by suppressing the temperature rise of the fan motor.

According to the second aspect of the present invention, the fan motor can be cooled by the air in the axial flow direction sucked into the centrifugal blower fan, and the life of the fan motor can be prolonged. By suppressing the temperature rise of the fan motor, the size of the fan motor can be further reduced, and the fan motor is attached and fixed to the chassis incorporated in the electrical equipment room. When cooled,
The chassis also cools down, and the temperature in the electrical equipment room also decreases, thereby extending the life of the fan motor and electrical components, and improving the reliability of the indoor unit.

According to the third aspect of the present invention, the temperature rise of the fan motor can be suppressed by the same configuration as the first and second aspects of the present invention. By lowering the temperature, the life of the fan motor and electrical components can be extended, the reliability of the indoor unit can be improved, and the fan motor for rotating the drive shaft of the cross flow fan can be used. Attached to the chassis incorporated in the electrical room, furthermore, the centrifugal blower is located near the center of the electrical room space, so the electrical components are not biased into the electrical room around the centrifugal blower. The electric components can be arranged so that the air from the centrifugal fan blows well and can be cooled uniformly and efficiently.

According to the fourth aspect of the present invention, a main body having a suction port for sucking indoor air and an outlet for exchanging heat between the sucked air and blowing into the room is formed, and the drawn indoor air is heated. A heat exchange chamber in the main body in which a heat exchanger for cooling is disposed; a cross flow fan provided in the heat exchange chamber for blowing out heat-exchanged air into the room; The heat exchange chamber is provided adjacent to one side inside the main body and an electrical equipment chamber is provided by partitioning the drive chamber.The drive shaft of the cross flow fan extending to the electrical equipment chamber includes
A centrifugal blower for stirring the air in the electrical equipment room is attached, and a suction port of the centrifugal blower is formed as an annular opening surrounding the fan motor, and rotates a drive shaft of the cross flow fan. Since the fan motor for driving is fixed near the center of the space in the electrical equipment room by a chassis incorporated in the electrical equipment room, the temperature of the fan motor is controlled in the same manner as in the first to third aspects of the invention. By suppressing the rise, the life of the fan motor can be extended and the size can be reduced. In addition, by lowering the temperature in the electrical room, the life of the fan motor and electrical components can be extended, and the reliability of the indoor unit can be improved.Furthermore, the centrifugal fan can be installed without biasing the electrical components into the electrical room. And electrical components can be arranged so that the air from the centrifugal blower fan can hit well and cool uniformly and efficiently.

[0045]

[Brief description of the drawings]

FIG. 1 is a side sectional view of a main part of an indoor unit of an air conditioner which is an example of an air conditioner according to an embodiment of the present invention.

FIG. 2 schematically shows a main part of an indoor unit for explaining a state of air blowing for air conditioning and air blowing for cooling an electrical equipment room by a blower having a cross flow fan and a centrifugal blower fan of the present invention. Side sectional view.

FIG. 3 is an external perspective view of a blower provided with a cross flow fan and a centrifugal blower employed in the indoor unit of the present invention.

FIG. 4 is a perspective view of a conventional air conditioner.

FIG. 5 is a side sectional view of an indoor unit of a conventional air conditioner.

FIG. 6 is a side sectional view of a main part of an indoor unit of a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit main body 2 Suction port 3 Evaporator 4 Blow-out port 5 Heat exchange room 6, 13 Cross flow fan 9 Fan motor 11 Electrical installation room 14 Centrifugal blower fan 15 Blower 16 Rotation axis of fan motor

Claims (4)

(57) [Claims] 1. A main body having a suction port for sucking indoor air and an outlet for exchanging heat with the sucked air to blow out the room, and a heat exchanger for heating / cooling the drawn indoor air. A heat exchange chamber in the main body provided, a cross flow fan provided in the heat exchange chamber for blowing out the heat-exchanged air into the room, and a cross flow fan inside the main body adjacent to the heat exchange chamber. and a the heat exchange chamber and the partition formed by providing the machine room on one side, extending the machine room the black
The drive shaft of the sflow fan blocks the air in the electrical equipment room.
While a centrifugal blower fan for stirring is attached, a fan for rotating the drive shaft of the cross flow fan is provided.
Part of the fan motor inside the centrifugal fan
An indoor unit of an air conditioner characterized by being assembled so as to be inserted . 2. A main body having a suction port for sucking indoor air and an outlet for exchanging heat with the sucked air to blow out the room, and a heat exchanger for heating / cooling the drawn indoor air. A heat exchange chamber in the main body provided, a cross flow fan provided in the heat exchange chamber for blowing out the heat-exchanged air into the room, and a cross flow fan inside the main body adjacent to the heat exchange chamber. On one side, the heat exchange chamber is provided with an electrical equipment chamber formed as a partition, and a drive shaft of the cross flow fan extending to the electrical equipment chamber has a centrifugal blower for stirring air in the electrical equipment chamber. Front while installed
A fan for rotating the drive shaft of the crossflow fan
Part of the fan motor inside the centrifugal fan
And rotate the drive shaft of the cross flow fan
A fan motor for driving is installed in the electrical room.
Air characterized by being fixed to a chassis
Harmonic unit indoor unit. Wherein the centrifugal blower fan electrical indoor space
2. The method according to claim 1, wherein the position is located near the center.
An indoor unit of the air conditioner according to claim 2 . 4. A suction port for sucking indoor air and a suction port.
The outlet from which the air is heat-exchanged and blown out into the room is shaped
Heats / cools the formed main body and the drawn indoor air
A heat exchange chamber in the main body in which a heat exchanger is disposed;
The heat-exchanged air is blown into the room.
Cross-flow fan for discharge and adjacent to the heat exchange chamber
And forming a partition with the heat exchange chamber on one side inside the main body
An electrical equipment room provided, and the cloth extending to the electrical equipment room is provided.
The drive shaft of the sflow fan blocks the air in the electrical equipment room.
A centrifugal fan for stirring is attached, and
The suction port of the blower surrounds the fan motor
The cross flow is formed as an annular opening.
ー Fan motor for rotating the drive shaft of the fan
Is an indoor unit of an air conditioner, wherein the indoor unit is fixed to a vicinity of a central portion of a space in the electrical equipment room by a chassis incorporated in the electrical equipment room .