JP6075088B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner.

  The air conditioner blows out cold air or hot air heat-exchanged by a heat exchanger from a blowout port of the indoor unit using a cross flow fan. Patent Document 1 discloses an auxiliary air outlet formed adjacent to both sides of the air outlet. The auxiliary air outlet opens at the front of the housing and blows out air using an auxiliary air blowing fan. The auxiliary blower fan and the cross flow fan have a common drive mechanism. Thereby, the electrical component unit for driving the auxiliary blower fan becomes common.

  While controlling the drive mechanism, the electrical component unit generates heat. For this reason, the electrical component unit is disposed in an air passage that connects the air inlet that sucks indoor air and the air outlet in the housing of the indoor unit body. By driving the cross flow fan in the indoor unit main body, air flows in the air passage and the electrical component unit can be cooled.

JP 2010-164271 A

  As for the air conditioner currently disclosed by patent document 1, the auxiliary blower outlet is installed in the housing | casing of the indoor unit main body provided with the blower outlet. However, in Patent Document 1, it is conceivable to move the auxiliary blower fan and the crossflow fan with different drive sources. In that case, when only the auxiliary blower fan is driven, air does not flow into the air passage of the indoor unit body, and the electrical component unit cannot be cooled.

  Therefore, the present invention provides an air conditioner that can cool an electrical component unit disposed in a housing of an indoor unit body even when the auxiliary blower fan has a drive source different from that of the cross flow fan. It is intended to provide.

  A main unit having a first blower fan that sucks indoor air from the inlet and blows out conditioned air from the outlet, and a room that is attached to the side of the main unit and sucks indoor air from the auxiliary inlet A fan unit having a second blower fan that blows air from an auxiliary outlet, and the first blower fan and the second blower at a position where the air sucked in by the first blower fan circulates inside the main body unit. A control unit for controlling the fan is disposed, the second blower fan is driven by a drive mechanism different from the drive mechanism of the first blower fan, and the control unit does not drive the first blower fan, and the fan When the second blower fan of the unit is driven for a predetermined time, the control unit drives the first blower fan.

  According to the above air conditioner, even when only the auxiliary blower fan is driven, the electrical component unit arranged in the casing of the indoor unit main body can be cooled.

It is a perspective view which shows roughly the external appearance of the indoor unit of a present Example. It is a disassembled perspective view which shows the structure of an indoor unit schematically. It is the schematic seen from the front of the main housing. It is a vertical sectional view of the indoor unit schematically showing the configuration of the first blower fan. It is the time chart which showed the drive state of the 1st ventilation fan and 2nd ventilation fan of ventilation mode. It is the time chart which showed the drive state of the 1st ventilation fan and 2nd ventilation fan of defrost operation mode.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the indoor unit 10 of the present embodiment includes a main unit 20 and a pair of fan units 30. An outer panel 23 is disposed on the front surface of the main unit 20. A suction port 21 for taking in indoor air is provided on the top side and the front side of the main unit 20. A front panel 24 is provided at a position facing the suction port 21 on the front side, and the front panel 24 is covered with an outer panel 23. As shown in FIG. 4, an indoor heat exchanger 25 and a first blower fan 27 are disposed inside the main unit 20. When the first blower fan 27 is driven, room air is sucked into the main unit 20 from the suction port 21. The sucked indoor air is heat-exchanged with the refrigerant in the indoor heat exchanger 25 to generate conditioned air. The generated conditioned air is deflected in the wind direction by the upper and lower wind direction plates 29 a and 29 b at the lower front of the main unit 20 and blown out into the room from the blowout port 22.

  The fan unit 30 is demonstrated based on FIG.1, FIG.2 and FIG.3. As shown in FIG. 1, the fan unit 30 is disposed so as to be accommodated in side fan covers 35 on both sides of the main unit 20. The fan unit 30 is pivotally supported by the side fan cover 35 so as to be rotatable around the horizontal axis 41 with respect to the main unit 20. As shown in FIG. 2, the fan unit 30 is provided with an auxiliary suction port 31 that sucks room air from the outside in the direction of the horizontal axis 41, and an auxiliary air blower that blows indoor air sucked from the auxiliary suction port 31 into the indoor space. An outlet 32 is disposed on the front side of the fan unit 30. The fan unit 30 also includes a second blower fan 33 for sucking room air and blowing out the sucked room air. The second blower fan 33 is disposed inside the fan unit 30. A motor 34 is connected to the second blower fan 33 and is driven by the motor 34.

  As shown in FIG. 3, a first electrical component unit 26 is disposed inside the main unit 20. The first electrical component unit 26 includes a power supply unit and a control unit of a drive source 28 that drives the first blower fan 27, a power supply unit and a control unit of a motor 34 that drives the second blower fan 33, and other electrical components. Has been. As shown in FIG. 2, the first electrical component unit 26 is attached to the front side of the main unit 20. Furthermore, at least a part of the first electrical component unit 26 is disposed so as to face the indoor heat exchanger 25 and is covered with the front panel 24.

  With this arrangement, the first electrical component unit 26 is arranged at a position where the air sucked from the suction port 21 by the first blower fan 27 flows. For example, as shown in FIG. 4, the first electrical component unit 26 is disposed between the suction port 21 and the indoor heat exchanger 25. With this arrangement, the first electrical component unit 26 is cooled by the air that is sucked from the suction port 21 and circulated by the first blower fan 27.

  Next, operation | movement of the air conditioner of a present Example is demonstrated. In the air conditioner of the present embodiment, when the cooling operation and the heating operation are set, the first electrical component unit 26 drives the first blower fan 27 of the main unit 20 to blow out conditioned air from the blower outlet 22. The second blower fan 33 of the unit 30 is driven to blow room air from the auxiliary air outlet 32 to air-condition the room to a set temperature. During the cooling operation, the conditioned air blown from the air outlet 22 is deflected in the horizontal direction by the upper and lower wind direction plates 29a and 29b and blown toward the vicinity of the ceiling, and the room air blown from the auxiliary air outlet 32 is inclined downward. Be blown out. Thereby, coolness can be provided by the air which agitates, without directly applying cold air to the person who is indoors. On the other hand, during the heating operation, the conditioned air blown from the blower outlet 22 is deflected by the upper and lower wind direction plates 29 a and 29 b and blown obliquely downward, and the indoor air blown from the auxiliary blower outlet 32 rotates the fan unit 30. It is blown out diagonally downward. Thereby, warm air can be suppressed from above with room air, and the feet of people in the room can be warmed.

  When the room temperature reaches the set temperature, the first electrical component unit 26 switches the air conditioner of the present embodiment to the air blowing mode in order to circulate the air in the room space. In this air blowing mode, the first electrical component unit 26 stops the first air blowing fan 27 and drives only the second air blowing fan 33. When the first electrical component unit 26 determines in the air blowing mode that the room needs to be air-conditioned, there is a temperature difference between the room temperature and the set temperature that exceeds a predetermined value, and then the air blowing mode is canceled and the cooling operation or heating is performed. Return to driving.

  Moreover, the 1st electrical component unit 26 switches to the defrost operation mode for removing frost, when it judges based on the outside temperature that the frost adhered to the outdoor heat exchanger in the outdoor unit which is not illustrated at the time of heating operation. In the defrosting operation mode, the refrigeration cycle is switched to the same state as the cooling operation. The first electrical component unit 26 stops the first blower fan 27 so as not to blow cold air from the air outlet 22 of the main unit 20. Moreover, after turning the auxiliary blower outlet 32 to the front, the rotational speed of the second blower fan 33 is changed to “weak” to make the air volume blown from the auxiliary blower outlet 32 into the indoor space weak.

  In these blowing modes and defrosting operation modes, the first electrical component unit 26 stops the first blowing fan 27 and drives only the second blowing fan 33. Since the 1st ventilation fan 27 has stopped, air is not inhaled from the suction inlet 21, and the 1st electrical component unit 26 is a state which is not cooled by the circulating air. Further, since the second blower fan 33 is driven, the power supply unit in the first electrical component unit 26 generates heat. Therefore, a procedure for cooling the first electrical component unit 26 when the air conditioner is operated in the blowing mode or the defrosting operation mode will be described.

  First, the procedure for cooling the first electrical component unit 26 when the air conditioner is operated in the air blowing mode will be described based on the time chart shown in FIG. When the room temperature reaches the set temperature when the air conditioner of the present embodiment is performing the cooling operation and the heating operation (when the compressor, the first blower fan 27, and the second blower fan 33 are operating). The first electrical component unit 26 stops the first blower fan 27 (OFF) and stops the compressor in the outdoor unit. The first electrical component unit 26 continuously drives the second blower fan 33.

  The first electrical component unit 26 stops the first blower fan 27 (OFF), and then starts counting the timer held inside. When a predetermined time has elapsed since the first blower fan 27 was stopped, the first electrical component unit 26 drives the first blower fan 27 (ON). The predetermined time in this embodiment is 10 minutes, which is the time from when the first blower fan 27 is stopped until the first electrical component unit 26 needs to be cooled. Thereby, the indoor air is sucked from the suction port 21, and the sucked indoor air is applied to the first electrical component unit 26, whereby the first electrical component unit 26 can be cooled. When 1 minute has passed since the first blower fan 27 was driven, the first electrical component unit 26 stops the first blower fan 27 (OFF). When 10 minutes have passed since the first blower fan 27 was stopped again, the first electrical component unit 26 drives the first blower fan 27 (ON). The first electrical component unit 26 repeats the stop (OFF) and drive (ON) of the first blower fan 27 until the room temperature is separated from the set temperature by a predetermined temperature or more. In addition, the air conditioner of this invention does not limit predetermined time to 10 minutes, You may change suitably according to the performance etc. of an air conditioner.

  Next, a procedure for cooling the first electrical component unit 26 when the air conditioner is operated in the defrosting operation mode will be described based on the time chart shown in FIG. When the air conditioner of this embodiment is performing a heating operation (when the compressor, the first blower fan 27, and the second blower fan 33 are operating), frost forms on the outdoor heat exchanger in the outdoor unit. When it is detected that it has adhered, the first electrical component unit 26 stops the first blower fan 27 (OFF) and sets the compressor in the outdoor unit to “low rotation”, which is lower than the maximum rotation number. Change it. The first electrical component unit 26 changes the second blower fan 33 to “weak”, which is the minimum number of rotations, with the auxiliary air outlet 32 facing the front, and continuously drives it. Note that by changing the second blower fan 33 to “weak”, the heat generation of the first electrical component unit 26 can be suppressed, and the time for driving only the second blower fan 33 can be lengthened. Furthermore, by turning the auxiliary air outlet 32 to the front, it is possible to agitate warm air that tends to accumulate near the ceiling.

  The first electrical component unit 26 stops the first blower fan 27 (OFF), and then starts counting the timer held inside. When a predetermined time elapses after the first blower fan 27 is stopped, or when it is detected that the frost attached to the outdoor unit has been removed, the first electrical component unit 26 rotates the first blower fan 27 at the maximum speed. It is driven by “weak” rotation, which is lower than the number of rotations. The predetermined time in this embodiment is 15 minutes. Thereby, the indoor air is sucked from the suction port 21, and the sucked indoor air is applied to the first electrical component unit 26, whereby the first electrical component unit 26 can be cooled. In addition, by driving the first blower fan 27 at a rotational speed lower than the maximum rotational speed, the air that has passed through the indoor heat exchanger 25 cooled in the defrosting operation mode is prevented from being blown out into the room as much as possible. I can do it. When three minutes have elapsed since the first blower fan 27 was driven at a “weak” rotation speed that is lower than the maximum rotation speed, the first electrical component unit 26 rotates the first blower fan 27 during normal operation. In addition, the second blower fan 33 is also returned to the rotational speed at the time of normal operation after the auxiliary air outlet 32 is directed obliquely downward, and the heating operation is resumed.

  As described above, when the second blower fan 33 is driven while the first blower fan 27 is stopped, the heat generated in the first electrical component unit 26 is cooled by the air sucked by driving the first blower fan 27. I can do it.

DESCRIPTION OF SYMBOLS 10 Indoor unit 20 Main body unit 21 Suction inlet 22 Outlet 25 Indoor heat exchanger 26 1st electrical equipment unit 27 1st ventilation fan 28 Drive source 30 Fan unit 31 Auxiliary inlet 32 Auxiliary outlet 33 Second ventilation fan 34 Motor 35 Side Fan cover

Claims (1)

A main unit having a first blower fan that sucks room air from the inlet and blows out conditioned air from the outlet;
A fan unit that is attached to a side portion of the main unit, has a second blower fan that sucks indoor air from an auxiliary suction port, and blows out the sucked indoor air from an auxiliary air outlet;
A control unit for controlling the first blower fan and the second blower fan is disposed at a position where the air sucked by the first blower fan circulates inside the main body unit,
The second blower fan is driven by a drive mechanism different from the drive mechanism of the first blower fan,
When the controller does not drive the first blower fan and drives the second blower fan of the fan unit for a predetermined time,
The said control part drives the said 1st ventilation fan, The air conditioner characterized by the above-mentioned.

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