JP6211892B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner control device.

  Conventionally, an air conditioner compares a set room temperature with a current temperature, and the room temperature is adjusted according to the comparison result. For this reason, the room is almost maintained at the set temperature, and a comfortable space can be maintained. Also, the air volume and direction can be set automatically or manually. Here, when operating the air conditioner with the air direction set manually, the direction of the air blown into the room is always constant. There was an air stagnation in the corner. This has been found to be significant when the air conditioner is operated in the cooling mode. As described above, the air stays in a specific place, so that a temperature difference occurs even in the same room, and temperature unevenness may occur. This temperature unevenness is detected by a change in room temperature after stable operation, and when the temperature unevenness occurs, the rotational speed of the indoor fan is increased, and the air flow is increased to stir the indoor air to reduce the indoor temperature unevenness. There was an air conditioner to be solved. (For example, see Patent Document 1)

JP-A-3-175233

  In this conventional air conditioner, it is difficult to eliminate the indoor temperature unevenness only by increasing the air volume of the indoor fan by determining the occurrence of the indoor temperature unevenness only by the self-determination of the indoor unit. It was necessary to manage. Accordingly, it is an object of the present invention to provide an air conditioner having a function capable of more accurately eliminating indoor temperature unevenness.

  The present invention pays attention to this point and solves the above-mentioned drawbacks. In particular, the configuration is such that the room temperature is detected by a room temperature sensor, and the room temperature is brought close to the set temperature based on the detected room temperature and the set temperature. Therefore, in an air conditioner having a function of performing control operation of air conditioning capability, an up-and-down air direction plate that is attached to an indoor unit and controls an up-and-down air direction plate, a louver motor that drives the up-and-down air direction plate, and the indoor A heat exchange sensor that detects the temperature of the heat exchanger provided inside the machine and a selection operation from a plurality of operation modes including at least an automatic cooling operation mode, as well as changing the setting of the wind direction and room temperature in each operation mode An operation unit, and a change operation in the direction of lowering the set room temperature by the operation unit after a first predetermined time from the start of the automatic cooling operation of the air conditioner, and the room temperature T - when the heat exchanger temperature T2 <= predetermined temperature difference T3, those having a control unit for the second predetermined time swing driving the wind vertically directing plate with increasing the air volume of the indoor fan.

According to the present invention, the occurrence of room temperature unevenness is not determined only by the self-determination of the indoor unit, but the control for eliminating the room temperature unevenness is triggered by the user's remote control operation. High temperature indoor temperature can be eliminated.
Moreover, since the indoor fan air volume and the up / down wind direction plate are actuated by the user's remote control operation, it is possible to prevent the user from being inconvenienced such as failure.

Sectional drawing of the indoor unit of one Example of this invention. The schematic explanatory drawing. The flowchart figure of the principal part.

Next, an air conditioner according to the present invention will be described with reference to an embodiment shown in the drawings.
1 is an indoor unit of a separate type air conditioner, and a casing is formed by a main body casing 2 and a front cover 3 at the front, and an open panel 5 having a horizontally long slit-like suction port 4 is provided at the center of the front cover 3. The panel 5 is mounted so as to be openable and closable in front of the front cover 3 with shafts (not shown) provided on the left and right sides of the upper part of the panel 5 as a fulcrum. An upper suction port 7 is provided on the upper surface of the front cover 3 in order to compensate for an opening area that is insufficient at the suction port 4. A fin tube type indoor heat exchanger 8 which is horizontally long and bent in multiple stages is provided inside the suction ports 4 and 7, and a cross flow type indoor fan 9 is disposed at the rear of the heat exchanger 8. Yes. The blower fan 9 rotates at a speed of about 750 to 1,100 rpm during normal operation, and sucks indoor air from the suction ports 4 and 7 and blows out the heat-exchanged air from the blower port 6. Below the indoor heat exchanger 8, a drain pan 10 integrally formed of a resin foam material is provided, which also functions as an air guide that receives condensed water and guides the air blown from the fan 9 to the outlet 6. .

  Reference numeral 11 denotes an indoor heat exchange sensor 14 that is attached to a copper tube or the like of the indoor heat exchanger 8 and detects the temperature (heat exchange temperature T2) of the indoor heat exchanger 8, and flows through the indoor heat exchanger 8 and the heat exchanger. The refrigerant temperature is detected. A room temperature sensor 12 is provided in the ventilation path between the suction port 4 and the heat exchanger 8 and detects the temperature of the indoor intake air (room temperature T1). Reference numeral 13 denotes an indoor air blowing motor that rotationally drives the indoor air blowing fan 9.

  Reference numeral 14 denotes a remote controller that transmits an operation signal to the indoor unit 1 by wireless communication such as an infrared signal, an operation switch 15 that operates and stops the air conditioner, and a pair of ascending and descending directions for indoor cooling and heating. A temperature setting switch 16 for setting the room temperature, an operation mode switch 17 for selecting an operation mode such as cooling, heating, automatic cooling, automatic heating, dehumidification, a wind direction change switch 18 for changing the direction of the blown air, a night timer, A timer switch 19 for performing timer operation such as a good morning timer, and a display unit 20 for displaying temperature and operation mode on a liquid crystal panel or the like are provided. The air direction change switch 18 changes the vertical direction of the blown air by driving the louver motor 22 that rotates the vertical air direction plate 21 provided in the air outlet 6 when pressed.

  Reference numeral 23 denotes an indoor control unit. When a cooling temperature or an operation signal set by the remote controller 14 is input, a room temperature T1 sent from the room temperature sensor 12 located on the suction side of the air flow path provided in the indoor unit 1 is obtained. The rotational speed of the indoor air blower motor 13 is controlled according to the temperature difference between the set room temperature T2 set by the temperature setting switch 16 and the current room temperature T2, and the air flow direction of the vertical airflow direction plate 21 is controlled by the louver motor 22. The operating condition signal is sent to the outdoor control unit 25 of the outdoor unit 24.

  The outdoor unit 24 includes a compressor 26, a four-way valve 27, an outdoor heat exchanger 28, and an expansion valve 29, and includes the indoor heat exchanger 8 of the indoor unit 1 and communicates with refrigerant piping through a refrigeration circuit 30. The refrigerant is circulated in the refrigeration circuit 30 to adjust the room temperature. In the cooling operation, as indicated by the broken line arrows in FIG. 1, the compressor 26, the four-way valve 27, the outdoor heat exchange are performed. The refrigerant circulates in the direction of the heater 28, the expansion valve 29, the indoor heat exchanger 8, and the four-way valve 27, so that the indoor heat exchanger 8 becomes a low temperature and the indoor air blower fan 9 blows cold air into the room to cool the room. During the cooling operation, the outdoor heat exchanger 28 becomes high temperature, and the outdoor blower fan 31 releases heat to the outside air.

  32 is an outdoor heat exchange sensor that detects the temperature of the surface of the outdoor heat exchanger 28, and is used in a defrosting operation during heating operation. Reference numeral 33 denotes an outside air temperature sensor, which is attached to the upstream side of the outdoor air blowing fan 31 by a ventilation path (not shown) in the outdoor unit 24 and detects the outside air temperature.

  The outdoor control unit 25 determines the operating frequency of the compressor 26 while obtaining information from the signal from the indoor control unit 23, the value of the outside air temperature sensor 33, and the like, and performs inverter control. This inverter control is output from the converter. The compressor 26 is driven by converting DC power into three-phase AC power.

  If the indoor temperature non-uniformity prevention function during automatic cooling operation is described with reference to the flowchart of FIG. 3, the rotational speeds of the indoor fan motor 13 and the compressor 26 are automatically set according to the temperature difference between the set room temperature T2 and the current room temperature T2. In the automatic cooling operation (s1) to be changed in step S1, it is determined in step 2 whether or not the first predetermined time of 30 minutes or more has elapsed and the air conditioner is in a stable state to some extent. Return to step 3, and if it is 30 minutes or more, proceed to step 3.

  In step 3, it is determined whether the user feels that the room is hot and operates the operation unit of the remote controller 14 to lower the set temperature, and if so, the room temperature sensor 12 (T 1) and the heat exchange sensor 11 are detected in step 4. (T2) is read, and when the temperature difference between the room temperature and the heat exchange temperature is small at 5 ° C. or less in step 5 (room temperature T1−heat exchange temperature T2 <= predetermined temperature difference T3), only the surroundings of the indoor unit 1 In step 6, the temperature difference between the room temperature and the heat exchange temperature is larger than 5 ° C. (room temperature T1−). In the case of heat exchange temperature T2> predetermined temperature difference T3), it returns to the automatic cooling operation and determines that the user has lowered the set temperature is not caused by temperature unevenness, and returns to step 1 to return to the normal Continue operation control by automatic operation.

  In step 6, in order to eliminate the temperature unevenness in the room, the air volume of the indoor fan 9 is maximized and the vertical airflow direction plate 21 is swung for 30 seconds which is the second predetermined time (s7). The swing of the plate 21 is stopped and returned to the original blowing angle, and the air flow rate of the indoor fan 9 is also returned to the automatic operation air flow rate, and the process proceeds to step 9.

  In step 9, it is determined whether the user has performed an operation for lowering the set temperature again within 15 minutes, which is the third predetermined time from step 8, and if yes, the process passes through A to step 11. When 15 minutes have passed without any operation, it is determined again in step 10 whether the temperature difference between the room temperature and the heat exchange temperature is 5 ° C. or less. If yes, the degree of temperature unevenness is still resolved. If it is determined that the temperature is small, the process returns to Step 6 and the swing operation is performed for 30 seconds with the maximum fan air volume. If No, the temperature unevenness is eliminated, so the process returns to the normal automatic operation of Step 1.

  In step 11, a timer X for measuring the sixth predetermined time is started, and in step 12, the air volume of the indoor fan 9 is maximized and the swing of the up-and-down air direction plate 21 is set to the fourth predetermined time, which is one minute. Do. (S13)

  In steps 14 and 15, the swing of the up-and-down air direction plate 21 is stopped for the fifth predetermined time for 30 seconds and returned to the original blowing angle, and the air volume of the indoor fan 9 is also returned to the air volume of automatic operation, and the process proceeds to step 16. This is repeated until 10 minutes, the sixth predetermined time, has elapsed.

  In step 17, whether the temperature difference between the room temperature and the heat exchange temperature is greater than 5 ° C. (room temperature T1—heat exchange temperature T2> predetermined temperature difference T3), or has the user operated the remote controller 14 to increase the set temperature? In the case of Yes, since the temperature unevenness has been eliminated, the process returns to the automatic cooling operation (s18), and in the case of No, the process returns to step 12 and the maximum air volume of the blower fan 9 and the swing of the vertical air direction plate 21 are returned. Repeat driving.

As described above, the operation of lowering the set temperature by the user's remote control 14 is used as a trigger to detect the temperature unevenness of the room temperature, and repeatedly until the temperature unevenness is eliminated, the maximum air volume of the blower fan 9 and the upper and lower wind direction plates 21. By performing the swing operation, the temperature unevenness in the room can be reliably and highly eliminated.
Further, since the indoor fan 9 air volume and the up-and-down air direction plate 21 are actuated as a result of the user's remote control operation, it is possible to prevent the user from causing unnecessary concerns such as failure due to an increase in noise such as blowing noise. .

DESCRIPTION OF SYMBOLS 1 Indoor unit 9 Indoor ventilation fan 11 Indoor heat exchange sensor 12 Room temperature sensor 13 Indoor ventilation motor 14 Remote control 21 Vertical wind direction board 23 Indoor control part

Claims (4)

  In an air conditioner having a function of performing control operation of the air conditioning capability to detect the room temperature by a room temperature sensor, and to bring the room temperature closer to the set temperature based on the detected room temperature and the set temperature, Up and down wind direction plate that is attached to the indoor unit and controls the wind direction in the up and down direction, a louver motor that drives the up and down wind direction plate, a heat exchange sensor that detects the temperature of the heat exchanger provided in the indoor unit, and at least cooling A selection operation is performed from among a plurality of operation modes including the automatic operation mode, and an operation unit for changing the setting of the wind direction and the room temperature in each operation mode is provided, and a first predetermined time from the start of the automatic cooling operation of the air conditioner When the operation unit is later changed to lower the set room temperature, and when the room temperature T1−the heat exchange temperature T2 <= the predetermined temperature difference T3, the air volume of the indoor fan is increased. Air conditioner, characterized in that the vertical airflow direction plate provided with a control unit for the second predetermined time swing drive while.   When the change operation is performed within the third predetermined time from the end of the second predetermined time and in the direction of lowering the set room temperature, the air volume of the indoor fan is increased and the vertical wind direction plate is swing-driven for the fourth predetermined time. 2. The air conditioner according to claim 1, further comprising a control unit that continuously repeats the swing drive stop for a fifth predetermined time for a sixth predetermined time.   When the room temperature T1−the heat exchange temperature T2 <= the predetermined temperature difference T3 after the third predetermined time is over, the controller further includes a controller that increases the air volume of the indoor fan again and swings the vertical wind direction plate for the second predetermined time. The air conditioner according to claim 1, characterized in that: After the sixth predetermined time, when room temperature T1−heat exchange temperature T2> predetermined temperature difference T3, the operation returns to the cooling automatic operation, and when room temperature T1−heat exchanger temperature T2 <= predetermined temperature difference T3, the air flow rate of the indoor fan again. 3. An air conditioner according to claim 2, further comprising: a controller that swings the up-and-down wind direction plate for a fourth predetermined time and then stops swing driving for the fifth predetermined time for a sixth predetermined time. .

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