JP3345503B2 - Indoor unit of 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 indoor unit for an air conditioner.

[0002]

2. Description of the Related Art As is well known, an air conditioner accommodates, for example, an indoor heat exchanger in an indoor unit, and includes a compressor, an expansion mechanism,
In some cases, the outdoor heat exchanger is housed in an outdoor unit, and the two units are connected by piping so that a refrigerant flows therethrough to form a refrigeration cycle. In such an air conditioner, an outdoor unit is installed outdoors, and an indoor unit is installed and fixed on a wall surface or the like in an air-conditioned room.

In the indoor unit, a fan for taking in room air from a suction port opened into the air-conditioning room is housed in the unit main body, and the air taken in by the fan and the dust removed by the filter is removed from the unit main body. It is conditioned by passing through an indoor heat exchanger located in the air flow path. The conditioned air is sent into the room from an air outlet opening into the air-conditioned room.

[0004] However, in the conventional device having such a configuration, maintenance or inspection or replacement of a fan or a fan motor is required, or an indoor heat exchanger or the like disposed in an air flow path or an air flow path. For example, when trying to clean the inside of the unit body, those operations are very difficult.

That is, when performing maintenance and inspection or replacement of a fan, a fan motor, or the like, first remove the front panel of the indoor unit and loosen the screw fixing the indoor heat exchanger or the like so that the indoor heat exchanger is floated. Then, lift the indoor heat exchanger so that it can be lifted and maintain a space where maintenance and inspection and replacement can be performed.After that, remove the fan and fan motor arranged in the air flow path downstream of the indoor heat exchanger and perform inspection. Had to do.

Further, when cleaning the downstream portion of the indoor heat exchanger and the downstream air flow path, the fixing screws are loosened as in the case of maintenance and inspection and replacement of the fan and the like. It had to be done by moving the position of the vessel.

[0007] For this reason, the work takes time, and when the indoor unit is mounted on a high wall, the work becomes more difficult and time-consuming, and attention must be paid to perform the work safely. I always had to pay.

Further, although the work is performed by moving the position of the indoor heat exchanger, a sufficient space cannot be taken, and the fins of the indoor heat exchanger hit during the work, which may cause a problem. There is a risk that the worker may be injured in his hand, so that sufficient care must be taken for safe operation.

[0009] Furthermore, since the position of the indoor heat exchanger is moved, cracks are likely to be generated in the auxiliary piping, and the cracks may cause a decrease in reliability such that the refrigerant leaks.

[0010]

As described above, in the conventional apparatus, the maintenance and replacement of a fan, a fan motor, and the like, or the cleaning of the inside of a unit body such as an indoor heat exchanger is performed by an indoor heat exchanger. It is necessary to release the fixing of etc. and secure the space so that the work can be done, it takes time to work, the serviceability is poor, and sufficient care is necessary to ensure the safety of work And The present invention has been made in view of such circumstances, and its purpose is to easily perform maintenance work and replacement work of a fan and a fan motor or a cleaning work of an indoor heat exchanger and the like in a short time. It is an object of the present invention to provide an indoor unit of an air conditioner that can be provided with good serviceability, is highly reliable, and does not need to pay special attention to secure work safety.

[0011]

The indoor unit of the air conditioner according to the present invention has an indoor heat exchanger and a heat exchanger auxiliary pipe inside a main body having a suction port at an upper portion and an outlet at a lower portion. In an indoor unit of an air conditioner including a fan, a fan motor, and an electric component, the main body includes the suction port.
Having an air flow path connected to this suction port inside
An upper unit having the outlet and the outlet
And a lower unit that forms an air flow path that connects
The upper unit unit is configured to
And a heat exchanger auxiliary pipe.
Place a drain pan below the internal heat exchanger and
The cutout unit is the fan, the fan motor, and the electric unit.
The product is stored and the fan is
Which forms a small gap between the air flow path and the wall of the air passage
Which is characterized by forming
The upper unit has a front panel and a rear case.
After that, the case is fixed to the wall in the air-conditioned room by the installation member.
And the upper unit
Air flow path continuous with the lower unit inside the slot
And characterized in that the integrated and locked and fixed by the locking member to be further off the lower unit part
The fan nose forms an air flow path of the lower unit.
And formed integrally by a flow path forming member,
The flow path forming member is located below the indoor heat exchanger in the upper unit.
A recess is provided for placing the drain pan
It is is characterized in that is further in which the upper unit part and the lower unit portion is characterized in that it is connected by suspended unit.

[0012]

The indoor unit of the air conditioner constructed as described above has a unit main body containing an indoor heat exchanger and an upper unit having a suction port, a fan, a fan motor and electric parts, and having an outlet. The main unit can be divided into the lower unit.When performing maintenance and inspection of the fan and fan motor, replacing parts, or cleaning the inside of the unit main unit such as an indoor heat exchanger, the unit main unit can be separated. And a lower unit, and a predetermined work can be performed after securing a sufficient working space for each separated unit. As a result, the work can be easily performed, the serviceability can be improved, and no special attention has to be paid to ensuring the safety of the work. Ma
The upper unit and the lower unit are combined
In the state, between the two unit parts always smoothly inside
Air flow path is formed, and the lower unit
The front nose of the fan and the
A predetermined small gap can be maintained between the air flow path and the wall.
Therefore, there is no fear that the blowing noise is generated due to the displacement.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a front view showing a state in which an upper unit and a lower unit of an indoor unit are separated, FIG. 2 is a refrigeration cycle diagram of an air conditioner, and FIG. FIG. 4 is a cross-sectional view of a state where the side unit is coupled with the upper unit, FIG. 4 is a cross-sectional view of an upper unit and a lower unit of the indoor unit in a separated state, and FIG. , FIG. 4 (b)
5 is a cross-sectional view of the lower unit, FIG. 5 is a connection diagram of the indoor fan, FIG. 6 is a perspective view of a main part, and FIG.
FIG. 8 is a connection diagram of a second modification, FIG. 9 is a connection diagram of a third modification, and FIG. 10 is a connection diagram of a fourth modification. .

1 to 6, the air conditioner comprises an indoor unit 1 installed in an air-conditioned room and an outdoor unit 2 installed outdoors.
Each of the first and second indoor heat exchangers 6 and 7 and the one-side connection port of the outdoor heat exchanger 8 communicate with the discharge port and the suction port of the compressor 4 via the four-way valve 5. The expansion mechanism 9 is connected between the other connection ports of the first and second indoor heat exchangers 6 and 7 and the outdoor heat exchanger 8. Further, the first and second indoor heat exchangers 6 and 7 and the outdoor heat exchanger 8 are provided with an indoor fan 12 and a propeller fan 13 which are rotationally driven by fan motors 10 and 11 so as to face each other. The cooling operation and the defrosting operation at the time of the heating operation can be performed by flowing the refrigerant in such a refrigeration cycle 3 in the direction of the solid arrow A, and the refrigerant is flowed in the direction opposite to the solid arrow A. Can perform heating operation.

The indoor unit 1 is a unit body 1
4 comprises an upper unit 15 and a lower unit 16. The upper unit section 14 has a front panel 17
And a rear case 18.
The indoor unit 1 is mounted by fixing the mounting piece 18a of No. 8 to a mounting plate 99 fixed to a wall or the like in an air-conditioned room. Further, the upper unit 15 and the lower unit 16 lock a locking member 20 provided on the lower case 19 below the upper unit 15 with an engaging portion (not shown) provided on the rear case 18. Thus, the unit body 14 is fixed and integrated.

Upper unit 15 and lower unit 16
In the unit main body 14 in a state in which the air passage 21 is integrated, a continuous air flow path 21 is formed inside, and the air inflow side of the air flow path 21 is connected to a suction port 22 opened in the front panel 17, and the air discharge side Is connected to an air outlet 23 that opens horizontally in the front part of the rear case 18. The front panel 17
Is detachably attached to the rear case 18, and a filter (not shown) is detachably provided on the inner surface side thereof so as to face the suction port 22, and the air outlet 23 is opened and closed by a louver motor 24 to adjust the wind direction. A louver 25 is provided so as to cross.

In the upper unit 15, a first indoor heat exchanger 6 and a second indoor heat exchanger 7, which perform heat exchange between the passing air and the heat exchange medium flowing inside, are provided with air. It is arranged so as to cross the air flow path 21 on the inflow side. Below the first and second indoor heat exchangers 6 and 7, gutter-shaped first and second gutters for collecting and discharging the drain to the outside are provided.
Drain pans 26 and 27 are provided.

Further, a lower case 19 of the lower unit 16
Inside the fan motor 1 so as to be disposed in the air flow path 21 downstream of the first and second indoor heat exchangers 6 and 7.
Indoor fan 12 of a cross-flow fan rotationally driven by zero
Is provided. The air flow path 21 at the position where the indoor fan 12 is provided is configured such that the downstream air flow path 21 becomes a negative pressure due to the rotation of the indoor fan 12 so that the suction and discharge of air are efficiently performed. A gap between the air passage 12 and the wall surface of the air passage 21 is small.

A nose 28 which forms a small gap between the indoor fan 12 and the front portion of the indoor fan 12 is provided with a flow path forming member such as styrene foam resin which forms the air flow path 21 of the lower unit section 16. 29 and is provided in the lower case 19 together with the indoor fan 12. The first drain pan 2 is provided in the flow path forming member 29.
A recess 30 in which 6 is disposed is formed.

Further, the lower case 1 of the lower unit 16
An electric component box 31 is housed in the inner part of 9. The electric component box 31 includes a microcomputer 32 to which various sensors (not shown) for controlling the operation of the air conditioner are connected, a connector 33 for supplying power to the outdoor unit 2 and transmitting / receiving a control signal, or the indoor unit 1. Upper unit part 1 of
An electric component such as a switch 34 of a fan motor stop unit that cuts off power supply to the fan motor 10 and the louver motor 24 when the lower part 5 and the lower unit 16 are vertically divided is provided.

The switch 34 has a switch body 35 attached to the lower unit 16 and opens and closes when an operating rod 36 extending from the switch body 35 advances and retreats. The tip of the operating rod 36 is provided so as to protrude upward from the lower unit 16, and is operated by an operating member 37 provided on the upper unit 15 to face the lower end, and the switch 34 is opened and closed. Will be

That is, the switch 34 is closed in a state where the upper unit 15 and the lower unit 16 are integrated, whereby the fan motor 10 becomes rotatable. When the upper unit 15 and the lower unit 16 are vertically divided, the switch 34 is opened, and the fan motor 10 does not rotate.
In FIG. 5, the object to be turned on / off by the switch 34 is represented by the fan motor 10, and the switch 34 is inserted into one of three power supply lines from the microcomputer 32 for supplying power to the fan motor 10. .

On the other hand, the rear case 18 and the lower case 19
Both ends of the hanging means 38 such as a chain or a string of a predetermined length are fixed. Thus, by detaching the locking member 20 provided on the lower case 19 from the engaging portion provided on the rear case 18, the unit body 14 is separated into the upper unit 15 and the lower unit 16. When this happens, the lower unit 16 is suspended below the upper unit 15 by the suspending means 38.

Even when the lower unit 16 is suspended, power supply to the outdoor unit 2 and power supply to the outdoor unit 2 are performed in the same manner as when the upper unit 15 and the lower unit 16 are integrated. The suspension means 3 according to the length of the wiring 39 connected to the connector 33 so that the connector 33 for transmitting and receiving the control signal does not fall off or an unnecessary force is applied.
The length of 8 is set with a margin.

Reference numerals 40 and 41 denote auxiliary heat exchanger pipes connected to the first and second indoor heat exchangers 6 and 7, respectively. The outdoor unit 2 has a through protection member 42 attached to a wall or the like at the time of installation. (Not shown) connected to a refrigerant pipe. Reference numeral 43 denotes a drain discharge pipe for discharging the drain from the first and second drain pans 26 and 27 to the outside. The drain is extended to the outside through the penetrating protection member 42 so that the drain is discharged outdoors.

Since the present embodiment is configured as described above, when performing the air conditioning operation, the indoor unit 1 connects the unit body 14 to the upper unit 15 and the lower unit 16.
Are performed in an integrated state. In this state, a smoothly continuous air flow path 21 is formed inside the upper unit 15 and the lower unit 16, and the electric circuits such as the fan motor 10 and the louver motor 24 are also operable.

Then, with the operation of the refrigeration cycle 3, the indoor fan 12 is rotationally driven by the fan motor 10, and the air in the air-conditioned room is taken into the indoor unit 1 from the suction port 22, and the taken air is the first and second air. 2, indoor heat exchanger 6,
Heat is exchanged during the passage through 7. The air conditioned by the heat exchange is sent out from the air outlet 23 provided with the louver 25 driven by the louver motor 24 into the air-conditioned room, and the air-conditioning in the air-conditioned room is performed.

At this time, a small gap between the indoor fan 12 and the wall surface of the air flow path 21 is formed integrally by the flow path forming member 29, and together with the indoor fan 12, the lower case 19 is formed.
, A predetermined gap size is maintained. Since no displacement occurs between the indoor fan 12 and the nose 28, there is no possibility that the blowing noise is generated due to the displacement, and the downstream air flow path 21 of the indoor fan 12 is in a negative pressure state. , Predetermined air is sucked and discharged.

The lower unit 1 of the indoor unit 1
6, the indoor fan 12 and the fan motor 10
When the maintenance and inspection of the louver motor 24 and the like, replacement of parts, and the like occur, the unit main body 14 is detached from the engagement member provided on the rear case 18 by releasing the locking member 20 provided on the lower case 19. The upper unit 15 and the lower unit 16 are separated. In this state, the lower unit 16 is suspended below the upper unit 15 by the suspending means 38.

In this way, a space is created between the upper unit 15 and the lower unit 16 so as not to be in an unsafe state when performing operations such as maintenance and inspection and replacement of parts. At the same time, the operation member 37 of the upper unit 15 is separated from the operating rod 36, and the switch 34 is opened, so that power is not supplied to the fan motor 10, the louver motor 24, and the like.

Thereafter, the indoor fan 12 and the fan motor 1
When a predetermined operation such as maintenance and inspection of the louver motor 24 and the replacement of parts is completed, the lower unit 16 is lifted while the suspension means 38 is housed in the lower case 19. Then, the locking member 20 is locked to the engagement portion,
The upper unit 15 and the lower unit 16 are combined again, and the indoor unit 1 is returned to the operable state.
In a case where cleaning of the air flow path 21 inside the unit main body 14 and cleaning of the first and second indoor heat exchangers 6 and 7 are performed, similarly to the above, the upper unit unit 15 and the lower unit unit 16 And is separated.

As described above, according to this embodiment, even when the indoor unit 1 is mounted at a high position on the wall surface of the air conditioning room, maintenance of the indoor fan 12, fan motor 10, louver motor 24, etc. of the indoor unit 1 is performed. At the time of inspection or replacement of parts, the lower unit 16 containing the indoor fan 12 and the fan motor 10 and the like is separated from the upper unit 15 and pulled down. It is possible to secure the space and perform the intended work.

As a result, the indoor fan 12 and the fan motor 10 can be easily removed, and other maintenance and inspections and replacement of parts can be easily performed, so that a predetermined operation can be easily performed in a short time. Good serviceability. In addition, a working space can be secured without moving or removing the first and second indoor heat exchangers 6 and 7, causing cracks in the piping to leak refrigerant, and causing injury by touching the fins. There is no danger of performing the operation easily, safely and highly reliably. Further, when the operation is performed, the switch 34 is in the open operation state, so that the electric circuit is energized due to forgetting to switch off or the like. Since it is no longer necessary to perform the work, no special attention needs to be paid to ensure the safety of the work, and further safety can be realized.

The unit body 14 can be divided into an upper unit 15 and a lower unit 16,
Since the gap size between the indoor fan 12 and the road wall surface of the air flow path 21 at the nose 28 can be ensured with high accuracy, no blast noise is generated unnecessarily.

In the above-described embodiment, when the unit body 14 is separated into the upper unit 15 and the lower unit 16, the switch 34 turns off the electric circuit such as the fan motor 10, but the electric circuit is cut off. However, the present invention is not limited to this, and may be configured as in the following modified examples. In each modified example, the same effect as in the above embodiment can be obtained.

First, in the first modified example, as shown in the connection diagram of FIG. 7, the switch 44 is inserted so that all three power supply lines from the microcomputer 32 for supplying power to the fan motor 10 are simultaneously turned on / off. I have. The switch 44 is a switch 34
Similarly to the above, the switch body is attached to the lower unit section 16, and the operation rod extending from the switch body is opened and closed by opening and closing, and the upper unit section 15 is opposed to the operation rod. It is operated by the operation member provided in.

That is, the switch 44 is closed in a state where the upper unit 15 and the lower unit 16 are integrated, whereby the fan motor 10 becomes rotatable. Further, when the upper unit 15 and the lower unit 16 are vertically divided, the switch 44 is opened, so that the fan motor 10 does not rotate.

In the second modification, as shown in the connection diagram of FIG. 8, a relay 45 is inserted in a power supply line from a power supply to the microcomputer 32. The relay 45 has a contact 45a inserted in series in a power supply wiring, and a coil 4 for opening and closing the contact 45a.
5b connects the switches 46 in series and is connected in parallel to the power supply wiring. Further, the switch 46 is provided with a relay 45 in the lower unit 16 similarly to the switch 34.
The operation rod extending from the switch body is opened and closed by opening and closing, and is operated by an operation member provided in the upper unit 15 so as to face the operation rod. Operate.

That is, when the upper unit 15 and the lower unit 16 are integrated, the switch 46 is closed, the coil 45b is excited and the contact 45a is closed, whereby the fan motor 10 rotates. Becomes possible. The upper unit 15 and the lower unit 16
When the and are divided up and down, the switch 46 is opened,
The coil 45b is de-energized and the contact 45a opens,
As a result, the fan motor 10 does not rotate.

In the third modification, as shown in the connection diagram of FIG. 9, the fan motor 10 is supplied with power by three power supply lines from the microcomputer 32a.
The power supply to the fan motor 10 may or may not be performed by turning on / off the photointerrupter 47 including the photodiode 47a and the phototransistor 47b attached to the lower unit 16 and connected to the fan unit 10. I do. The on / off operation of the photo-interrupter 47 is performed by advancing and retreating a partition member 48 provided in the upper unit 15 in the middle of the optical path between the photodiode 47a and the phototransistor 47b.

That is, when the upper unit 15 and the lower unit 16 are integrated, the light from the photodiode 47a is blocked by the partition member 48 and does not reach the phototransistor 47b, and the photointerrupter 47 is turned off. The fan motor 10 is in an operating state, whereby the fan motor 10 is in a rotatable state. In a state where the upper unit 15 and the lower unit 16 are vertically divided, light from the photodiode 47a reaches the phototransistor 47b, and the photointerrupter 47 is turned on.
As a result, the fan motor 10 does not rotate.

In the fourth modification, as shown in the connection diagram of FIG. 10, the fan motor 10 is supplied with power by three power supply lines from the microcomputer 32b.
When the reed switch 49 connected to the lower unit 16 and connected to the lower unit 16 opens and closes, power is supplied to the fan motor 10 or not.

The opening / closing operation of the reed switch 49 is performed when the permanent magnet 50 provided in the upper unit 15 approaches or moves away from the reed switch 49.

That is, when the upper unit 15 and the lower unit 16 are integrated, the upper unit 1
5 comes close to the reed switch 49, and the magnetic force of the permanent magnet 50 acts to close the reed switch 49, thereby causing the fan motor 10 to close.
Becomes rotatable. Also, the upper unit 15
When the lower unit 16 and the lower unit 16 are vertically divided, the permanent magnet 50 separates from the reed switch 49 and the permanent magnet 5
The magnetic force of 0 does not act, and the reed switch 49 is opened, whereby the fan motor 10 does not rotate.

In each of the above-described modifications, the same effect as in the embodiment can be obtained.

[0046]

As is apparent from the above description, according to the present invention, the unit main body contains an indoor heat exchanger and has an upper unit having a suction port, and a lower body having a fan, a fan motor and electric parts and having an air outlet. Can be divided into side units
Combination of upper unit and lower unit
In this condition, a smooth continuous inside of both units is always maintained.
Air flow path is formed, and the lower unit
Since the fan nose is formed, air blowing due to misalignment
There is no danger of generating noise, and maintenance and inspection, replacement of parts, and cleaning work become easy and serviceability is improved.Also, reliability is secured, and special measures are taken to secure work safety. And the like.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which an indoor unit according to an embodiment of the present invention is separated into an upper unit and a lower unit.

FIG. 2 is a refrigeration cycle diagram of the air conditioner according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which an upper unit and a lower unit of the indoor unit according to one embodiment of the present invention are combined.

FIG. 4 is a cross-sectional view showing a separated state of an upper unit and a lower unit of the indoor unit according to one embodiment of the present invention, and FIG. 4 (a) is a cross-sectional view of the upper unit;
(B) is sectional drawing of a lower unit part.

FIG. 5 is a connection diagram of an indoor fan according to one embodiment of the present invention.

FIG. 6 is a perspective view of a main part in one embodiment of the present invention.

FIG. 7 is a connection diagram of an indoor fan according to a first modification of the embodiment of the present invention.

FIG. 8 is a connection diagram of an indoor fan according to a second modification of the embodiment of the present invention.

FIG. 9 is a connection diagram of an indoor fan according to a third modification of the embodiment of the present invention.

FIG. 10 is a connection diagram of an indoor fan according to a third modification of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Indoor unit 6 ... 1st indoor heat exchanger 7 ... 2nd indoor heat exchanger 10 ... Fan motor 12 ... Indoor fan 14 ... Unit main body 15 ... Upper unit part 16 ... Lower unit part 22 ... Suction port 23 … Outlet 31… Electrical parts box 40,41… Auxiliary piping for heat exchanger

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tetsuro Ozawa 336 Tatehara, Fuji City, Shizuoka Prefecture Inside Toshiba A-V E Corporation (56) References JP-A-59-69633 (JP, A) JP-A-54 JP-A-38652 (JP, A) JP-A-60-228828 (JP, A) JP-A-5-154410 (JP, A) JP-A-61-78992 (JP, A) JP-A-2-135375 (JP, A) ) Actually open sho 59-13927 (JP, U) Actually open sho 59-75623 (JP, U) Real open hei 4-95216 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1/00 401

Claims (4)

(57) [Claims] 1. An air conditioner having an indoor heat exchanger, a heat exchanger auxiliary pipe, a fan, a fan motor, and electric components inside a main body having an intake port disposed at an upper portion and an outlet port disposed at a lower portion. In the indoor unit, the main body may be the suction port.
Having an air flow path connected to this suction port inside
An upper unit having the outlet and the outlet
And a lower unit that forms an air flow path connected to the upper unit. The upper unit stores the indoor heat exchanger and the auxiliary heat exchanger pipe, and
A drain pan is disposed below the internal heat exchanger, and the lower unit accommodates the fan, the fan motor, and the electrical components , and the fan is disposed at a front portion of the fan.
Which forms a small gap between the air flow path and the wall of the air passage
An indoor unit of an air conditioner, wherein the air conditioner is formed . 2. An upper unit includes a front panel and a rear casing.
After that, the case is fixed by the mounting member.
And fixed to a mounting plate fixed to the wall etc. in the air-conditioned room
The lower unit is connected to the upper unit.
Locked and fixed by a locking member so that a formed air flow path is formed.
The indoor unit of the air conditioner according to claim 1, wherein the indoor unit is integrated . 3. The fan nose of the lower unit section is
The flow path forming member that forms the air flow path of the lower unit
In addition to being integrally formed, the flow path forming member includes:
Drain located below the indoor heat exchanger in the upper unit
The indoor unit for an air conditioner according to claim 1, wherein a recess for disposing the bread is formed . 4. A claim that the upper unit part and the lower unit portion is characterized in that it is connected by suspended means
3. The indoor unit of the air conditioner according to 2 .