air conditioner
An air conditioner and air technology, which is applied to refrigerators, compressors, mechanical equipment, etc., can solve the problems of shortening the defrosting operation interval, increasing the number of defrosting operations, and reducing the operating efficiency of the refrigeration cycle device.
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Embodiment approach 1
[0017] figure 1 It is a figure which shows the structure of the air conditioner concerning Embodiment 1 of this invention. like figure 1 As shown, the air conditioner according to Embodiment 1 is a refrigeration cycle device having a refrigerant circuit configured by piping the outdoor unit 100 and the indoor unit 200 via gas refrigerant piping 300 and liquid refrigerant piping 400 . In the air conditioner according to Embodiment 1, one outdoor unit 100 and one indoor unit 200 are connected. The air conditioner according to Embodiment 1 can switch between a cooling operation for cooling the room which is a space to be air-conditioned, and a heating operation for heating the room.
[0018] Indoor unit 200 of Embodiment 1 includes indoor heat exchanger 5 and indoor fan 7 . The indoor heat exchanger 5 performs heat exchange between the air in the room which is the space to be air-conditioned and the refrigerant. For example, during heating operation, it functions as a condens...
Embodiment approach 2
[0034] In Embodiment 1 described above, the determination of clogging by foreign matter is performed when the operation of the air conditioner is started. The air conditioner according to Embodiment 2 performs processing for determining clogging while the air conditioner is operating.
[0035] Figure 5 It is a figure which shows the example of the time change of the command voltage of the fan motor 2A of the air conditioner concerning Embodiment 2 of this invention. Figure 5 A case where the air conditioner is operated in a state where the outdoor heat exchanger 1 of the outdoor unit 100 is clogged with foreign matter is shown. At this time, the increase rate α of the command voltage for the fan motor 2A set by the device control unit 10A tends to be larger than the increase rate β of the command voltage for the fan motor 2A due to frost formation.
[0036] Therefore, in the air conditioner according to Embodiment 2, it is determined whether or not clogging due to foreign ...
Embodiment approach 3
[0043] In Embodiment 1, the determination at the start of the operation of the air conditioner is performed. In addition, in Embodiment 2, determination is made based on the rate of increase of the command voltage during execution of the operation of the air conditioner. Embodiment 3 sets a determination threshold value for determining clogging of foreign matter caused by a command voltage during operation of the air conditioner.
[0044] Figure 7 It is a figure which shows the example of the time change of the command voltage of the fan motor 2A of the air conditioner concerning Embodiment 3 of this invention. like Figure 7 As shown, in Embodiment 3, the time required to be K times the reduction ratio of the allowable operating time relative to the normal operating time t2 is defined as the congested operating time K×t1. As described above, when clogging occurs, the interval until the defrosting operation is performed is shortened compared with the normal operation time....
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