JP2017096606A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which enhances comfort of a user without giving the same a sensation of heat and humidity or coldness even when indoor humidity is not reduced to target humidity after an indoor temperature is reduced to a target temperature.SOLUTION: An air conditioner comprises: a body unit with a blower; a fan unit with an auxiliary blower; and a control section which has a temperature sensor and a humidity sensor and controls the body unit and the fan unit. When a temperature of indoor air measured with the temperature sensor reaches a set temperature and humidity of the indoor air measured with the humidity sensor is higher than target humidity during cooling operation of the air conditioner, the control section switches from the cooling operation to dehumidification operation. When the humidity of the indoor air measured with the humidity sensor is still higher than the target humidity even after performing the dehumidification operation for a predetermined period, the control device performs the dehumidification operation with the rotation speed of the auxiliary blower increased compared to the same before switching from the cooling operation to the dehumidification operation.SELECTED DRAWING: Figure 6

Description

The present invention relates to an air conditioner that performs a dehumidifying operation.

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. As this blower fan rotates, room air is sucked into the main unit. The sucked air is heat-exchanged with the refrigerant in the indoor heat exchanger, and is blown into the room as conditioned air. An auxiliary blower fan is disposed inside the fan unit, and functions as a blower that blows out indoor air sucked into the fan unit. (For example, refer to Patent Document 1.)

The air conditioner described in Patent Document 1 blows out cool air from the main unit to lower the room temperature during cooling operation, and blows out room air from the fan unit to stir the air in the room, Spread the whole thing. 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. Further, when the temperature difference between the room temperature and the set temperature becomes equal to or greater than a predetermined temperature difference during the thermo-off operation, the air conditioner returns to the cooling operation.

JP 2014-145561 A (3rd to 4th pages, FIG. 2)

By the way, in addition to the operation to bring the room temperature closer to the set temperature, when performing the operation to bring the room humidity closer to the target humidity, the room temperature falls to the set temperature faster than the room humidity drops to the target humidity, and the thermo-off operation is performed. May be switched to. In this case, there is a problem that the indoor humidity cannot be lowered to the target humidity and the user feels muddy and uncomfortable. In addition, if the cooling or dehumidifying operation is performed until the room humidity reaches the target humidity without switching to the thermo-off operation, there is a problem that the room temperature becomes lower than the set temperature and the user feels cold and feels uncomfortable. .

An object of the present invention is to solve the above-described problems and to provide an air conditioner capable of performing a cooling operation and a dehumidifying operation with improved user comfort.

In order to solve the above-mentioned problems, the present invention is attached to a main body unit having a blower fan that sucks conditioned air from a suction port and blows out conditioned air from a blower outlet in the lower part of the front surface, and is attached to a side portion of the main body unit. A fan unit having an auxiliary blower fan that sucks and sucks indoor air from an auxiliary suction port on one side and blows out the indoor air from an auxiliary air outlet on the front side, a temperature sensor for measuring the temperature of the indoor air, In an air conditioner including a humidity sensor that measures the humidity of air, and a control unit that controls the main body unit and the fan unit, the control unit is configured to control the indoor air measured by the temperature sensor during cooling operation. When the temperature reaches the set temperature and the humidity of the indoor air measured by the humidity sensor is higher than the target humidity, the cooling operation is switched to the dehumidifying operation, and the removal is performed. When the humidity of the room air measured by the humidity sensor is higher than the target humidity when the operation time of the operation has passed a predetermined time, the rotational speed of the auxiliary blower fan is increased from that before switching to the dehumidifying operation. And

According to the air conditioner of the present invention, by controlling the cooling operation and the dehumidifying operation according to the temperature change of the room temperature and the humidity change of the room humidity, an air conditioner that improves the comfort of the user can be provided.

It is a perspective view which shows roughly the external appearance of the indoor unit of the air conditioner by this invention. It is a disassembled perspective view which shows roughly the structure of the indoor unit of the air conditioner by this invention. It is the schematic which looked at the main housing | casing of the indoor unit of the air conditioner by this invention from the front. It is a vertical sectional view of the indoor unit schematically showing the configuration of the blower fan of the indoor unit of the air conditioner according to the present invention. It is explanatory drawing explaining operation | movement of the air_conditionaing | cooling operation and dehumidification operation according to transition of the indoor temperature and indoor humidity of the indoor unit of the air conditioner by this invention. It is a flowchart which shows an example of the process of the air_conditioning | cooling operation and dehumidification operation of the indoor unit of the air conditioner by this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings. Note that the present invention is not limited to the following embodiments, and various modifications can be made without departing from the spirit of the present invention.

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. As shown in FIG. 2, 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. 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 outlet 32 that blows the indoor air sucked from the auxiliary suction port 31 into the indoor space is a front surface of the fan unit 30. Placed on the side. As shown in FIG. 3, 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 the auxiliary blower fan 33 rotates by rotating 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 that measures the humidity of the indoor air. A sensor 52 is mounted. Moreover, the storage part 54 is provided and the indoor temperature which the user who is indoors can feel comfortable is stored as the set temperature, and the indoor humidity is stored as the target humidity. The set temperature and target humidity may be set by the user using a remote controller or the like.

The electrical component unit 26 is attached to the front side of the main unit 20, and is thus arranged at a position where air sucked from the suction port 21 by the blower fan 27 flows. 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 measure the temperature and humidity in the room as the air sucked from the suction port 21 by the blower fan 27 circulates around these sensors. I can do it.

Next, operations during the cooling operation and the dehumidifying operation of the main unit 20 and the fan unit 30 will be described. During the cooling operation and the dehumidifying operation, the indoor heat exchanger 25 shown in FIG. 4 functions as an evaporator that absorbs heat from the air, and the cold air that is conditioned air blown out from the air outlet 22 is the main body by the vertical airflow direction plates 29a and 29b. It is deflected in the horizontal direction toward the front side of the unit 20 and blown out. At this time, the indoor 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 the direction in which the cool air blown from the blower outlet 22 (main body) The air is blown obliquely downward (in the horizontal direction toward the front side of the unit 20). Accordingly, it is possible to prevent the cold air blown from the air outlet 22 from being directly applied to a person in the room and to give unpleasant feeling due to the cold, and to blow the room air blown from the auxiliary air outlet 32 toward the person in the room. Can provide coolness.

FIG. 5 is an explanatory diagram for explaining the operation of the cooling operation and the dehumidifying operation according to the transition of the indoor temperature and the indoor humidity of the indoor unit 10 of the air conditioner according to the present invention. In the graph of FIG. 5, the vertical axis represents room humidity and room temperature, and the horizontal axis represents time. The table shown below the grab shows the operation mode switched according to the transition of the room humidity and the room temperature and the air volume of the auxiliary blower fan 33. T1, T2, and T3 indicate timings at which the operation mode and the air volume of the auxiliary blower fan 33 are switched.

When the cooling operation is started, the control unit 53 sets the air volume of the auxiliary blower fan 33 to “breeze” until the room temperature reaches the set temperature as indicated by the temperature transition X in the temperature change. When the indoor temperature reaches the set temperature at T1, it is checked whether the indoor humidity has decreased to the target humidity, and the indoor humidity decreases to the target humidity as shown in humidity transition a and humidity transition b. If not, dehumidifying operation in which the operation mode is reduced from the cooling operation to the lowering of the room temperature (for example, the temperature of the indoor air sucked into the main unit 20 is temporarily reduced to dehumidify, and the temperature of the dehumidified room air is lowered to room temperature. Switch to reheat dehumidifying operation that raises conditioned air. When the indoor humidity has decreased to the target humidity at T1, the cooling operation is stopped from the cooling operation, and the operation is switched to the thermo-off operation in which only air is blown from the auxiliary blower fan 33.

When the humidity change is indicated by the humidity transition a, the control unit 53 starts a dehumidifying operation in which the air volume of the auxiliary blower fan 33 is maintained at the air volume “light wind” during the cooling operation at T1. In addition, the measurement of the operation time of the dehumidifying operation is started, and the operation time of the dehumidifying operation being measured is a predetermined time (for example, the time required for the change in the indoor humidity due to performing the dehumidifying operation to fall within a certain indoor humidity If the room humidity has not decreased to the target humidity until T3 reaches 30 minutes, the air volume is increased from “light wind” to “weak wind” by increasing the rotation speed of the motor 34 of the auxiliary blower fan 33 at T3. And continue dehumidifying operation. By doing in this way, even if indoor humidity does not fall to the target humidity, the airflow of the indoor air blown out from the auxiliary air blower fan 33 hits the person in the room, and provides coolness to the person in the room. I can do it.

Further, as shown in the humidity transition b, the controller 53 reduces the operating time of the dehumidifying operation from T1 when the indoor humidity has already decreased near the target humidity when the indoor temperature reaches the set temperature and the dehumidifying operation is started. If the room humidity has decreased to the target humidity at T2 until T3 when the predetermined time is reached, the operation mode is switched from the dehumidifying operation to the thermo-off operation at T2. In addition, the air volume of the auxiliary blower fan 33 maintains the air volume “slight wind” during the dehumidifying operation. By doing in this way, indoor humidity falls below target humidity, and it feels cold to the person who is indoors, and does not give discomfort.

Thus, by performing the dehumidifying operation while maintaining the air volume “slight wind” of the auxiliary blower fan 33 during the cooling operation for a predetermined time, the dehumidifying operation reaches the predetermined time as indicated by the humidity transition a T3. However, if the indoor humidity does not decrease to the target humidity, the dehumidifying capacity is insufficient (that is, even if the dehumidifying operation is continued while maintaining the air volume “light wind” of the auxiliary blower fan 33 after T3). It is determined that the person in the room feels muggy and uncomfortable, and the air volume of the auxiliary blower fan 33 is increased to provide coolness to the person in the room. Further, as shown in the humidity transition b in the humidity change b, even when the indoor humidity has decreased to near the target humidity before the start of the dehumidifying operation, the air volume “slight wind” of the auxiliary blower fan 33 during the cooling operation during the dehumidifying operation. Therefore, people in the room feel cold and do not feel uncomfortable.

In addition, when the indoor humidity in T1 is higher than the target humidity by a predetermined humidity, the air volume of the auxiliary blower fan 33 may be increased from the air volume during the cooling operation together with the start of the dehumidifying operation. Thereby, it is possible to shorten the time for making the user feel hot and uncomfortable.

FIG. 6 is a flowchart showing an example of the cooling operation and the dehumidifying operation of the indoor unit 10 of the air conditioner according to the present invention. As a condition for starting the processing of FIG. 6, it is assumed that a signal instructing cooling operation is transmitted from a remote controller (not shown). Note that ST described in the flowchart represents a step, and the subsequent numbers represent step numbers.

When the indoor unit 10 receives a signal for instructing the cooling operation from a remote controller (not shown), the control unit 53 starts the cooling operation (ST1). Specifically, as described with reference to FIG. 4, the air flow is deflected by the upper and lower airflow direction plates 29 a and 29 b and the control unit 53 blows conditioned air in the horizontal direction from the air outlet 22 toward the front surface side of the main unit 20. Further, by rotating the fan unit 30, the auxiliary air outlet 32 is directed obliquely downward, and room air is blown out from the auxiliary air outlet 32.

Next, the control unit 53 acquires the room temperature measured by the temperature sensor 51 (ST2). And it is confirmed whether the room temperature acquired by ST2 is below the preset temperature memorize | stored in the memory | storage part 54 (ST3). When the room temperature is higher than the set temperature (ST3-No), the process returns to S2. Further, when the room temperature becomes equal to or lower than the set temperature (the timing of T1 of the humidity transition a and the humidity transition b described in FIG. 5) (ST3-Yes), the indoor humidity measured by the humidity sensor 52 is acquired ( ST4). Then, it is confirmed whether or not the room humidity acquired in ST4 is equal to or lower than the target humidity stored in the storage unit 54 (ST5). When the indoor humidity is equal to or lower than the target humidity (ST5-Yes), switching to the thermo-off operation (ST6). 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 to make the air volume “light”. Then, the cooling operation and the dehumidifying operation are finished.

On the other hand, when the room humidity is higher than the target humidity in ST5 (ST5-No), the control unit 53 switches the operation mode from the cooling operation to the dehumidifying operation and starts the dehumidifying operation (ST7), and measures the dehumidifying operation time. Start (ST8). The indoor humidity measured by the humidity sensor 52 is acquired (ST9). Then, it is confirmed whether or not the room humidity acquired in ST9 is equal to or lower than the target humidity stored in the storage unit 54 (ST10). If the indoor humidity is equal to or lower than the target humidity (timing T2 of the humidity transition b described in FIG. 5) (ST10-Yes), the process jumps to ST6. Moreover, when indoor humidity is higher than target humidity (ST10-No), it is confirmed whether the operation time of the dehumidification operation which started time measurement in ST8 has reached a predetermined time (ST11). When the operation time of the dehumidifying operation has not reached the predetermined time (ST11-No), the process returns to ST9.

On the other hand, when the operating time of the dehumidifying operation reaches a predetermined time (timing T3 of the humidity transition a described in FIG. 5) (ST11-Yes), the control unit 53 increases the rotational speed of the auxiliary blower fan 33. . For example, in the case of the cooling operation, if the air volume is the rotational speed at which the air volume is a slight wind, the rotational speed is set to a wind speed at which the air volume is weak (ST12). The indoor humidity measured by the humidity sensor 52 is acquired (ST13). And it is confirmed whether the indoor humidity acquired by ST13 is below the target humidity memorize | stored in the memory | storage part 54 (ST14). If the indoor humidity is equal to or lower than the target humidity (ST14-Yes), the process jumps to ST6. Moreover, when indoor humidity is higher than target humidity (ST14-No), it returns to ST13.

In ST6, when switching to the thermo-off operation, the control unit 53 periodically acquires the indoor temperature measured by the temperature sensor 51, and when the temperature difference between the acquired indoor temperature and the set temperature becomes a predetermined temperature difference or more. Return from the cooling off operation to the cooling operation.

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 30 Fan unit 31 Auxiliary inlet 32 Auxiliary outlet 33 Auxiliary blower fan 34 Motor 35 Side fan cover 51 Temperature sensor 52 Humidity Sensor 53 Control unit 54 Storage unit

Claims (1)

A main body unit having a blower fan that sucks in conditioned air from the suction port and blows out conditioned air from the blower outlet at the lower part of the front surface. A fan unit having an auxiliary blower fan that blows in and sucks in indoor air from an auxiliary outlet on the front side, a temperature sensor that measures the temperature of the room air, a humidity sensor that measures the humidity of the room air, and In the air conditioner including a main unit and a control unit that controls the fan unit, the control unit is configured so that the temperature of the room air measured by the temperature sensor during cooling operation reaches a set temperature, and the humidity sensor When the humidity of the indoor air measured in step 1 is higher than the target humidity, the cooling operation is switched to the dehumidifying operation, and the operating time of the dehumidifying operation has passed a predetermined time And time, when the humidity of the room air measured by the humidity sensor is higher than the target humidity, and wherein the raising than before switching to the dehumidification operation the rotational speed of the auxiliary blower fan.

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