JP2840532B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which an indoor unit is installed on an indoor wall or floor.

[0002]

2. Description of the Related Art An indoor unit of this type of an air conditioner is disclosed, for example, in Japanese Utility Model Publication No. 5-739.
Such an indoor unit is connected to an outdoor unit by a refrigerant pipe to constitute an air conditioner.

[0003]

In such a separation type air conditioner, in the case of a so-called embedded pipe in which a drain hose is embedded in a wall or the like, a U-shaped trap is provided in the drain hose. Since it is not known even if it is formed, the drain was not discharged smoothly, and the drain sometimes overflowed from the drain pan.

[0004] The present invention provides an air conditioner that can prevent drain from overflowing from a drain pan.

[0005]

The present invention comprises an indoor unit and an outdoor unit connected to the indoor unit. The indoor unit includes a heat exchanger for controlling the temperature of indoor air, and a heat exchanger for controlling the temperature of the indoor air. A drain pan disposed below the exchanger and having a protrusion protruding to the side of the heat exchanger, wherein the indoor unit is mounted on a wall or floor in a room. The indoor unit is provided with a mounting portion facing obliquely forward, and a water overflow prevention detector for preventing overflow of the drain is detachably mounted on the mounting portion.

[0006]

In this air conditioner, the overflow prevention detector is detachably attached to the mounting portion facing obliquely forward, so that the overflow prevention detector can be attached and detached obliquely from the front.
In addition, the detection of the overflow prevention detector prevents the drain from overflowing from the drain pan.

[0007]

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

1 and 2, reference numeral 1 denotes an indoor unit, which is connected to an outdoor unit (not shown) by a refrigerant pipe 2 and a hot water pipe 3. The exterior body of the indoor unit 1 includes a back panel 1A and a front panel 1B detachably provided on the back panel.
And a suction grill 1C attached to the front panel. Inside the indoor unit 1, a heat exchanger 4, a cross flow fan 5, and an electrical component 6 for controlling these are provided. Reference numeral 7 denotes an inlet, 8 denotes an outlet, 9 denotes a drain hose, 10 denotes a wired remote controller, and 10A denotes an operation switch provided on the wired remote controller.

[0009] The heat exchanger 4 of the indoor unit comprises a heat exchanger 4A through which a refrigerant flows and a hot water heat exchanger 4B through which hot water flows. A drain pan 11 is disposed below the heat exchanger 4. The drain pan 9 is connected to a drain hose 9 at a connection port 11C.

The drain pan 11 has a protruding portion 11A protruding laterally from the side end A of the heat exchanger 4. FIG.
), A boss (mounting portion) 11B facing obliquely forward is formed on this protruding portion. Reference numeral 12 denotes a fixture formed of a synthetic resin. The fixture includes a stopper 12A screwed to a boss and a float sensor (a detector for preventing overflow).
3 is formed so as to be detachably stopped. The angle α between the direction B in which the stopper 12A extends and the horizontal line C is set to about 23 degrees (see FIG. 9), so that it can be easily attached and detached diagonally from the front.

The float sensor 13 is for detecting the water level of the drain pan 11, and sends a signal to the controller 6 composed of electrical components when a dangerous water level at which the drain overflows is reached. When the signal from the float sensor is input, the controller 6 stops the operation of the air conditioner. 12C is a hexagonal recess into which the float sensor 13 fits, 12D is an insertion portion into which the wiring of the float sensor is inserted, 14 is a nut for fixing the float sensor 13, and 13A is a float of the float sensor 13.

In the air conditioner thus configured, the indoor unit 1 is installed on the upper part of the indoor wall. Then, during the cooling operation, the drain adheres to the refrigerant heat exchanger 4 </ b> A and drops into the drain pan 11. Usually, this drain is discharged outside through a drain hose 9. However, when a trap is formed in the drain hose 9 or when agar-like slime is generated, the drain is not discharged or becomes difficult to be discharged, so that the drain water level in the drain pan 11 gradually rises. Will come. When the float sensor 13 reaches a distance L (for example, 15.5 mm, see FIG. 4) from the upper end of the drain pan 11, the float starts to move.
Further, when the float sensor 13 detects that the water level of the drain set in advance as the dangerous water level, for example, the distance M from the upper end of the drain pan 11 (for example, 10.5 mm, see FIG. 4), a signal is sent to the controller 6. Send. When this signal is input, the controller 6 stops the operation of the air conditioner. As described above, when the liquid level reaches 10.5 mm from the upper end of the drain pan 11, the liquid is stopped so that even if the operation of the indoor unit 1 is stopped, the drain drops from the heat exchanger 4 for a while. Therefore, the above-mentioned setting is made with a margin.

In this air conditioner, since the operation is controlled to stop when the drain reaches the dangerous water level, leakage of the drain into the room is prevented.

If the operation is stopped by the signal of the float sensor 13, the operation is set so that the operation is not performed even if the operation switch 10A is pressed again.
Unless you request service from the manufacturer, you cannot restart. Therefore, the cause of the drain not being removed is removed by the service person of the manufacturer.

Further, the float sensor 13 for detecting the water level of the drain may be contaminated with dirt in the drain or may break down, though rarely. In such a case, the float sensor 13 must be removed for cleaning or replacement. In this case, first, when the front panel 1B is removed, the heat exchanger 4 and the drain pan 11 are exposed. Then, when the screw of the mounting portion 12A is removed with a screwdriver or the like from the upper front diagonally, the float sensor 13 can be removed together with the mounting tool 12. As described above, since the fixing of the mounting portion 12A can be removed from the diagonally front side, the maintenance of the float sensor 13 can be easily performed. Further, since the indoor unit 1 is provided on a wall in the room and is not covered with a ceiling panel as in the case of an embedded ceiling type air conditioner and is exposed to the indoor side, maintenance of the float sensor 13 is particularly easy. is there.

In this embodiment, an example is described in which a float type overflow detector is provided. However, when a liquid level of the drain reaches between the two electrodes, a current flows to detect the liquid level of the drain. An electrode-type overflow prevention detector may be provided. However, in this case, the height of the liquid level can be detected more accurately, though it is more expensive than the float type detector.

[0017] A detector for preventing overflow may be provided on a unit in which the indoor unit is installed on the floor in the room.

[0018]

According to the present invention, since the overflow prevention detector is detachably attached to the mounting portion facing obliquely forward, the overflow prevention detector can be attached and detached diagonally from the front. Maintenance can be easily performed. In addition, the detection by the overflow prevention detector can prevent the drain from overflowing from the drain pan, thereby preventing the room from being stained with the drain.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an indoor unit of an air conditioner of the present invention.

FIG. 2 is a sectional view of an indoor unit of the air conditioner.

FIG. 3 is a plan view showing a relationship among a drain pan, a fixture, and a float sensor.

FIG. 4 is a front view showing the vicinity of a projected portion of a drain pan.

FIG. 5 is a plan view of an attachment for the float sensor.

FIG. 6 is a front view of an attachment for the sensor.

FIG. 7 is a side view of an attachment of the sensor.

FIG. 8 is a bottom view of an attachment of the sensor.

FIG. 9 is a sectional view taken along line IX-IX shown in FIG. 5 of the mounting fixture of the sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit 4 Heat exchanger 11 Drain pan 11A Projection part 11B Attachment part 13 Float sensor (Detector for prevention of overflow)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-3620 (JP, U) JP-A-61-200520 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24F 1/02 371

Claims (1)

(57) [Claims] 1. An indoor unit comprising: an indoor unit; and an outdoor unit connected to the indoor unit. The indoor unit includes a heat exchanger for controlling indoor air temperature, a heat exchanger disposed below the heat exchanger, and A drain pan having a protruding portion protruding to the side of the heat exchanger, wherein the indoor unit is mounted on a wall or floor in a room, wherein the protruding portion faces obliquely forward of the indoor unit. An air conditioner comprising a mounting portion, and a water leakage prevention detector for preventing overflow of drain is detachably mounted on the mounting portion.