JP6421667B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner.

  Some indoor units of an air conditioner include a main unit and a pair of fan units attached to both sides of the main unit. An indoor heat exchanger and a blower fan are arranged inside the main unit. By rotating this blower fan, indoor air is sucked into the main unit, and the sucked air is heat-exchanged with the refrigerant in the indoor heat exchanger and blown into the room as conditioned air. An auxiliary blower fan is disposed inside the fan unit. By rotating this auxiliary blower fan, the room air is sucked into the fan unit and serves as a blower that blows out the sucked room air. (For example, refer to Patent Document 1.)

  In the air conditioner described in Patent Document 1, in order to bring the room temperature close to the set temperature during the cooling operation, the room temperature is lowered by blowing cool air from the main unit, and the room air is blown by blowing the room air from the fan unit. Stir the air in the room to spread the cold air throughout the room. When the room temperature reaches the set temperature by this cooling operation, the blower fan of the main unit is stopped, and the operation is switched to the thermo-off operation in which only the auxiliary blower fan of the fan unit blows air. If the temperature difference between the room temperature and the set temperature becomes greater than or equal to a predetermined value during the thermo-off operation, the air conditioner returns to the cooling operation.

JP 2014-145561 A

  In Patent Document 1, since the above-described thermo-off operation is performed, there is a problem that indoor humidity cannot be removed by the thermo-off operation when the indoor humidity is higher than a predetermined value. Further, when the cooling operation is continued without switching to the thermo-off operation, the cold air blown out from the main unit may cause the user to feel cold and uncomfortable.

  Therefore, the present invention provides an air conditioner that removes indoor humidity after the room temperature reaches a set temperature during cooling operation and prevents the user from being directly exposed to cold air.

  In order to achieve the above-described object, the air conditioner of the present invention measures the temperature of a room fan and a blower fan that sucks room air from a suction port and blows out the conditioned air from a blower outlet at the lower part of the front surface. A main body unit having a temperature sensor, and an auxiliary blower fan that is attached to a side portion of the main body unit, sucks room air from an auxiliary suction port on one side, and blows out the sucked room air from an auxiliary air outlet on the front side The air conditioner includes a fan unit having a main body unit and a control unit that controls the fan unit. During the cooling operation of the air conditioner, the temperature of the room air measured by the temperature sensor reaches a set temperature. When it does, a control part reduces the rotation speed of a ventilation fan, and raises the rotation speed of an auxiliary ventilation fan.

  In addition, the air conditioner of the present invention has a humidity sensor that the main unit measures the humidity of the room air, and when the temperature measured by the temperature sensor reaches the set temperature during the cooling operation of the air conditioner, The control unit compares the humidity measured by the humidity sensor and the preset humidity stored in advance. If the humidity is higher than the set humidity, the controller lowers the rotation speed of the blower fan and increases the rotation speed of the auxiliary blower fan. .

  Furthermore, the air conditioner of the present invention is provided at the lower front portion of the main unit, and includes an up-and-down air direction plate that vertically deflects the conditioned air blown out from the blower outlet, and the fan unit receives room air blown out from the auxiliary blower outlet. After the temperature measured by the temperature sensor has reached the set temperature while the air conditioner is in cooling operation, the control unit can blow the room air blown out from the auxiliary air outlet. The direction of the fan unit is changed so as to be lower than the blowing direction of the conditioned air blown from the blower outlet.

  According to the air conditioner as described above, after the room temperature reaches the set temperature, the room humidity can be removed without causing discomfort to the user.

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 blower fan. It is a vertical sectional view of the indoor unit during the cooling operation and the heating operation of the present embodiment. It is a flowchart which shows the operation | movement of the air_conditionaing | cooling operation of a present Example.

  Embodiments of an air conditioner according to the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1, 2, and 4, the indoor unit 10 of the present embodiment includes a rectangular parallelepiped main body 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 blower fan 27 are disposed inside the main unit 20. As the blower fan 27 rotates, 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 up and down wind direction plates 29 a and 29 b provided in the air outlet 22 at the lower front of the main unit 20, and blown out into the room from the air outlet 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 the auxiliary air outlet that blows the room air sucked from the auxiliary suction port 31 into the indoor space. 32 is arranged on the front side of the fan unit 30. In addition, the fan unit 30 includes an auxiliary blower fan 33 for sucking room air and blowing out the sucked room air. The auxiliary blower fan 33 is disposed inside the fan unit 30. A motor 34 is connected to the auxiliary blower fan 33 and is rotated by the motor 34.

  As shown in FIG. 3, an electrical component unit 26 is disposed inside the main unit 20. The electrical component unit 26 includes a control unit 53 that controls the blower fan 27 and the auxiliary blower fan 33, a temperature sensor 51 that measures the temperature of the indoor air sucked from the suction port 21, and a humidity sensor that measures the humidity of the indoor air. 52 is mounted. As shown in FIG. 2, the electrical component unit 26 is mounted on the front side of the main unit 20 so that at least a part of the electrical component unit 26 faces the indoor heat exchanger 25. Covered by the panel 24. The electrical component unit 26 includes a storage unit 54, and stores in advance humidity that can be felt by a user in the room as a set humidity. This set humidity may be set by the user using a remote controller or the like.

  By attaching the mounting position of the electrical component unit 26 to the front side of the main unit 20, the electrical component unit 26 can be disposed at a position where air sucked from the suction port 21 by the blower fan 27 circulates. For example, as shown in FIG. 4, the electrical component unit 26 is disposed between the suction port 21 and the indoor heat exchanger 25. Further, the temperature sensor 51 and the humidity sensor 52 mounted on the electrical component unit 26 can measure the temperature and humidity in the room as the air sucked from the suction port 21 by the blower fan 27 circulates around them. I can do it.

  Operations during cooling operation and heating operation of the main unit 20 and the fan unit 30 will be described.

  During the cooling operation, the indoor heat exchanger 25 functions as an evaporator that absorbs heat from the air, and as shown in FIG. 5 (a), the cold air that is conditioned air blown out from the outlet 22 is the vertical airflow direction plate 29a. 29b is deflected in the horizontal direction and blown out. At this time, the room air blown from the auxiliary blower 32 by rotating the fan unit 30 until the auxiliary blower 32 is directed obliquely downward from the horizontal direction is blown out of the cool air blown from the blower outlet 22 (horizontal direction). ) Is blown obliquely downward. Thereby, the cold air blown out from the air outlet 22 is directly applied to a person in the room to prevent the cold from causing discomfort, and the room air blown out from the auxiliary air outlet 32 is blown out toward the person in the room. Can provide coolness. The controller 53 controls the rotational speeds of the blower fan 27 and the auxiliary blower fan 33 in accordance with the temperature difference between the room temperature measured by the temperature sensor 51 and the set temperature set by the user. In the air volume automatic mode, when the temperature difference is large, the rotation speed of the blower fan 27 and the auxiliary blower fan 33 is controlled to be increased, and when the temperature difference is small, the rotation speed of the blower fan 27 and the auxiliary blower fan 33 is decreased. Control to be.

  During the heating operation, the indoor heat exchanger 25 functions as a condenser that radiates heat to the air, and as shown in FIG. 5B, the warm air that is conditioned air blown out from the air outlet 22 is a vertical airflow direction plate 29a. , 29b, and blown vertically downward toward the floor surface. At this time, the room air blown from the auxiliary blower port 32 by rotating the fan unit 30 until the auxiliary blower port 32 is directed forward from the vertically lower side is blown out warm air blown from the blower port 22 (vertically downward). Blows forward than. Since the air direction of the room air blown out from the auxiliary air outlet 32 is directed slightly higher than the air direction of the warm air blown out from the air outlet 22, the room air blown out from the auxiliary air outlet 32 is from the air outlet 22. The warm air blown out can be suppressed from above, and the rise of the warm air can be prevented to warm the feet of people in the room. As in the cooling operation, the control unit 53 controls the rotation speeds of the blower fan 27 and the auxiliary blower fan 33 according to the temperature difference between the room temperature measured by the temperature sensor 51 and the set temperature set by the user. In the air volume automatic mode, when the temperature difference is large, the rotation speed of the blower fan 27 and the auxiliary blower fan 33 is controlled to be increased, and when the temperature difference is small, the rotation speed of the blower fan 27 and the auxiliary blower fan 33 is decreased. Control to be.

  Next, the operation of switching to the thermo-off operation when the room temperature reaches the set temperature during the cooling operation of the air conditioner of the present embodiment will be described based on the control flowchart shown in FIG.

  First, when the indoor unit 10 receives a signal for instructing the start of a cooling operation transmitted from a remote controller (not shown) by a remote controller receiver (not shown), the control unit 53 starts the cooling operation (S1). Specifically, as described above, the control unit 53 assists by rotating the fan unit 30 by blowing the conditioned air in the horizontal direction from the outlet 22 by leveling the up-and-down air direction plates 29a and 29b. The room air is blown out from the auxiliary air outlet 32 with the air outlet 32 directed obliquely downward.

  Next, the controller 53 acquires a set temperature transmitted from a remote controller (not shown) (S2), and acquires the room temperature measured by the temperature sensor 51 (S3). The control unit 53 controls the rotational speeds of the blower fan 27 and the auxiliary blower fan 33 according to the temperature difference between the acquired room temperature and the set temperature. In the air volume automatic mode, when the temperature difference is large, the rotation speed of the blower fan 27 and the auxiliary blower fan 33 is controlled to be increased, and when the temperature difference is small, the rotation speed of the blower fan 27 and the auxiliary blower fan 33 is decreased. Control to be.

  The control unit 53 determines whether or not the room temperature acquired in S3 is equal to or lower than the set temperature acquired in S2 (S4). If the room temperature is higher than the set temperature (S4-No), the control unit 53 returns to S3. . When the room temperature is equal to or lower than the set temperature (S4-Yes), the control unit 53 acquires the room humidity measured by the humidity sensor 52 (S5).

  Next, the control unit 53 determines whether or not the acquired indoor humidity is higher than the set humidity stored in the storage unit 54 (S6). When the acquired indoor humidity is equal to or lower than the set humidity (S6-No), the control unit 53 switches to the thermo-off operation (S7). Specifically, the control unit 53 stops the rotation of the blower fan 27 and rotates only the auxiliary blower fan 33 at a low rotation.

  When the room humidity is higher than the set humidity (S6-Yes), the control unit 53 makes the rotation speed of the blower fan 27 smaller than the rotation speed of the blower fan 27 when the room temperature reaches the set temperature. The rotational speed, for example, a predetermined minimum rotational speed is set (S8), and the orientation of the up and down airflow direction plates 29a and 29b is fixed at an angle at which the conditioned air blown out from the blowout port 22 is directed in the horizontal direction. Further, the control unit 53 sets the rotation speed of the auxiliary blower fan 33 to a rotation speed larger than the rotation speed of the auxiliary blower fan 33 when the room temperature reaches the set temperature, for example, from a minimum rotation speed to a weak rotation speed. The rotation speed is set to a large one-step air volume (S9), and the air blowing direction of the room air blown out from the auxiliary air outlet 32 is fixed at an angle that is directed obliquely downward. As a result, humid indoor air is sucked in from the suction port 21 of the main unit 20, cooled by the indoor heat exchanger 25, removed from the moisture, and then blown into the room through the air outlet 22. Further, by setting the rotational speed of the blower fan 27 to the minimum rotational speed, the amount of air sucked into the suction port 21 of the main unit 20 is minimized, and the decrease in the room temperature is minimized. In this way, the blower fan 27 is set to a low rotation speed, the auxiliary blower fan 33 is set to a high rotation speed, and a dehumidifying and cooling operation, which is a cooling operation mainly for dehumidification, is performed. As described above, the humidity of the room air can be removed, and the room air blown out from the auxiliary blower fan 33 and the cold air blown out from the blower fan are mixed to give the user an uncomfortable feeling without feeling cold. Can not be.

  Thereafter, the control unit 53 acquires the indoor humidity measured by the humidity sensor 52 again (S10), and determines whether or not the acquired indoor humidity is higher than the set humidity stored in the storage unit 54 ( S11). When the indoor humidity is equal to or lower than the set humidity (S11-No), the control unit 53 switches to the thermo-off operation (S7). When the room humidity is higher than the set humidity (S11-Yes), the control unit 53 continues the above-described dehumidifying and cooling operation until the room humidity is determined to be equal to or lower than the set humidity, and repeats the operations of S9 and S10.

  In this embodiment, the auxiliary blower fan 33 is rotated during the cooling operation. However, the present invention is not limited to this, and when the auxiliary blower fan 33 is stopped during the cooling operation, the room temperature is set. When the temperature falls below the temperature, the controller 53 controls the auxiliary blower fan 33 to rotate.

  As described above, in the air conditioner of the present invention, after the room temperature reaches the set temperature by the cooling operation, the humidity in the room can be removed without causing discomfort to the user.

DESCRIPTION OF SYMBOLS 10 Indoor unit 20 Main body unit 21 Suction inlet 22 Outlet 25 Indoor heat exchanger 26 Electrical component unit 27 Blower fan 28 Motor 30 Fan unit 31 Auxiliary inlet 32 Auxiliary outlet 33 Auxiliary blower fan 34 Motor 35 Side fan cover 53 Control part

Claims (3)

A blower fan that sucks in indoor air from the inlet and blows out conditioned conditioned air from the outlet at the bottom of the front surface, and a main unit having a temperature sensor for measuring the temperature of the indoor air,
A fan unit that is attached to a side portion of the main unit and has an auxiliary blower fan that sucks room air from an auxiliary suction port on one side and blows out the sucked room air from an auxiliary outlet on the front side;
In an air conditioner comprising the main unit and a control unit that controls the fan unit,
When the temperature of the indoor air measured by the temperature sensor reaches a set temperature during the cooling operation of the air conditioner,
The said control part reduces the rotation speed of the said ventilation fan, and raises the rotation speed of the said auxiliary ventilation fan, The air conditioner characterized by the above-mentioned. In the air conditioner according to claim 1,
The main unit has a humidity sensor for measuring the humidity of indoor air,
During the cooling operation of the air conditioner, when the temperature measured by the temperature sensor reaches a set temperature,
The control unit compares the humidity measured by the humidity sensor with a preset humidity stored in advance, and when the humidity is higher than the set humidity, the rotational speed of the blower fan is reduced, and the auxiliary blower fan An air conditioner characterized by increasing the number of rotations. In the air conditioner according to claim 1 or 2,
An upper and lower airflow direction plate that is provided at a lower part of the front surface of the main unit and deflects the conditioned air blown out from the air outlet vertically
The fan unit is provided so that indoor air blown out from the auxiliary outlet can be changed in the vertical and horizontal directions,
During the cooling operation of the air conditioner, after the temperature measured by the temperature sensor reaches a set temperature,
The control unit changes the direction of the fan unit so that the blowing direction of the indoor air blown from the auxiliary blower outlet is lower than the blowing direction of the conditioned air blown from the blower outlet. A featured air conditioner.

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