JP2008039333A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein, in a thermostatic off state of cooling operation, when a compressor in an outdoor unit is stopped or operated at low capacity, air taken in is blown into a room by a fan as containing waterdrops (moisture) on a heat exchanger to cause higher room humidity and less comfort. <P>SOLUTION: An indoor unit has a heat exchanger and a fan, and an outdoor unit has a compressor. In a thermostatic off state of cooling operation, the speed of the fan can be changed in accordance with the operation time of the compressor to reduce the discharge of air containing waterdrops (moisture) and avoid a room humidity increase. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner that performs thermo-off control during cooling operation.

  Conventionally, this type of air conditioner has a configuration of a separate type air conditioner composed of an indoor unit and an outdoor unit (see, for example, Patent Document 1).

  FIG. 3 is a schematic configuration diagram of a conventional separate type air conditioner, and FIG. 4 is a side sectional view of a conventional indoor unit.

  As shown in FIG. 3, the separate air conditioner includes an indoor unit 1 and an outdoor unit 2, and circulates fluid between the indoor unit 1 and the outdoor unit 2 by a compressor 3 in the outdoor unit 2.

  As shown in FIG. 4, air is sucked into the indoor unit 1 from the suction panel 4 in the direction A, and the air sucked by the heat exchanger 5 and the fluid flowing in the heat exchanger 5 are heat-exchanged. The exchanged air is discharged from the air outlet 6 by the fan 7 in the B direction. Upper and lower blades 8 that swing by a motor 9 are attached in the vicinity of the air outlet 6.

  The operation and action of the room in which the air conditioner as described above is installed will be described below using the indoor unit 1 and the outdoor unit 2.

During the cooling operation, the air sucked from the A direction inside the indoor unit 1 is cooled by the fluid in the heat exchanger 5, dehumidified, and blown out in the B direction. Further, the blown cold air reaches every corner of the room by the swinging upper and lower blades 8. During the cooling operation, when the air conditioning in the room in which the indoor unit 1 is installed reaches a set temperature (set by a remote controller or the like), the operation of the compressor 3 of the outdoor unit 2 is stopped or operated at a low capacity to circulate the fluid. Stops. This is called a so-called thermo-off state (hereinafter referred to as thermo-off). That is, during the cooling operation, when the room temperature reaches the set temperature, the compressor 3 stops or operates at a low capacity, and the circulation of the fluid stops. When the room temperature rises above the set temperature, the compressor 3 is operated to cool the room again, and the fluid circulates through the heat exchanger 5. Since the air conditioner adjusts the room temperature according to the temperature set by the remote controller or the like, such operation is repeated.
JP-A-6-26716

  However, in the conventional configuration, in the thermo-off state during the cooling operation of the air conditioner, the outdoor unit is stopped, but the fan of the indoor unit is operated at the set rotational speed. At this time, since the compressor of the outdoor unit is stopped or operates at a low capacity, heat exchange between the sucked air and the fluid is lost during heat exchange of the indoor unit, and the sucked air is cooled or dehumidified. It will be in a state that does not. For this reason, the sucked air passes through the heat exchanger and contains water droplets (moisture) adhering to the heat exchanger, and is blown out into the room by the fan. The air containing the moisture is blown into the room humidity. However, the person who is in the room becomes very uncomfortable due to the increase in humidity, so that there is a problem that comfort is lowered.

The present invention solves the above-mentioned conventional problems, and controls the rotational speed of the fan according to the operation time of the compressor during cooling operation, thereby preventing an increase in room humidity and improving comfort. The purpose is to provide.

  In order to solve the above-described conventional problems, an air conditioner according to the present invention is a compressor attached to an outdoor unit that changes the number of rotations of a fan depending on the operation time of the compressor during thermo-off during cooling operation. It is.

  As a result, the air containing water droplets (moisture) adhering to the heat exchanger is blown out into the room during the thermo-off, and the humidity has increased significantly. Therefore, it is possible to reduce the discharge amount of air containing water droplets (water).

  In the air conditioner of the present invention, the control for reducing the rotation speed of the fan according to the operation time of the compressor attached to the outdoor unit can reduce the humidity of the room and improve the comfort during the thermo-off.

  According to the first aspect of the present invention, the increase in humidity can be reduced by reducing the number of revolutions of the fan by the control for changing the number of revolutions of the fan attached to the indoor unit, that is, the operation time of the compressor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
Since the indoor unit in the embodiment of the present invention is the same as the conventional one, the side sectional view of the conventional indoor unit in FIG. 4 is used, and the operation and action of the installed room will be described below.

  During the cooling operation, the air sucked from the A direction inside the indoor unit 1 is cooled by the heat exchanger 5, dehumidified, and blown out in the B direction. The cold air blown out reaches every corner of the room by the swinging upper and lower blades 8. When the air conditioning in this room reaches a set temperature (set by a remote controller or the like), the operation of the outdoor unit 2 is stopped. That is, the compressor 3 that is a device for circulating the fluid installed in the outdoor unit 2 stops. In these thermo-off states, the operation of changing the rotational speed of the fan 13 is performed according to the operation time of the compressor.

  FIG. 1 shows a correlation diagram between the compressor and the fan rotation speed in the first embodiment of the present invention. In FIG. 1, the control in the case where the rotation speed of the fan 7 in the indoor unit 1 is reduced by the operation time of the compressor installed in the outdoor unit 2 is shown. The fan 7 has a set rotational speed at an operating time C or less, but changes (decreases) to the rotational speed F at an operating time D or more, and changes (decreases) to the rotational speed G at an operating time E or more. Reduce the amount of air released.

FIG. 2 is a correlation diagram between the operation of the compressor and time in the first embodiment of the present invention. The horizontal axis indicates time, and the vertical axis indicates thermo-on (compressor 3 operation) and thermo-off (compressor 3 stop). In FIG. 2, the thermo-on time or the thermo-off time varies depending on the room temperature. That is, when the operation time of the compressor 3 is short, the amount of moisture adhering to the heat exchanger 5 is small, and when the operation time is long, the amount of water adhering to the heat exchanger 5 is large. When the operating time is short, the fan 7 operates at a low rotational speed, and when the operating time of the compressor 3 is long, the fan 7 operates at a high rotational speed. Thereby, optimal control suitable for the state of the heat exchanger 5 (a state including moisture (water droplets)) can be performed.

  As described above, the air-conditioning apparatus according to the present invention can be applied to applications such as a dehumidifier because it is possible to prevent an increase in the humidity of the room when the thermo is off by controlling the fan.

Correlation diagram between compressor and fan rotation speed in Embodiment 1 of the present invention Correlation diagram between compressor operation and time in Embodiment 1 of the present invention Schematic configuration diagram of a conventional separate air conditioner Side sectional view of a conventional indoor unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Outdoor unit 3 Compressor 4 Suction panel 5 Heat exchanger 6 Outlet 7 Fan 8 Upper and lower blades 9 Motor A Air direction B Outlet direction C Operation time D Operation time E Operation time F Rotational speed G Rotational speed

Claims (1)

An air comprising an indoor unit provided with a heat exchanger, a fan, and an outdoor unit provided with a compressor, wherein the number of rotations of the fan is changed according to the operation time of the compressor at the time of thermo-off of the cooling operation. Harmony device.

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