Air-conditioner

Abstract

The present invention provides an air conditioner, which uses a plurality of human detection sensors to divide the area requiring air conditioning into a plurality of areas according to the positions of people in the area requiring air conditioning, and sets the frequency of each area according to the frequency of people. regional characteristics. Based on the response result of the human body detection sensor within the first predetermined time period, a judgment condition indicating human presence is set in each area characteristic, and whether there is a person in each area is estimated based on the set judgment condition. According to the response result of the human body detection sensor in the second specified time, when a person is detected in the first area, it is inferred that there is a person at a time interval shorter than that of the second area; Since no one is estimated at a long time interval, the time required for inferring presence in the first area is set shorter and the time required for inferring no one is set longer in the first area than in the second area.

Description

technical field [0001] The present invention relates to an air conditioner in which an indoor unit is provided with a human detection sensor for detecting human presence, and more particularly relates to a technology for efficiently performing air conditioning operation by reliably estimating the position of a person. Background technique [0002] In conventional air conditioners, the estimation of the position of a person in an area requiring air conditioning is performed by determining that there is a person in the area when the infrared sensor is turned on for a predetermined number of times at intervals of more than a certain time within a predetermined period of time. That is, when the conduction signal output from the infrared sensor is input, time measurement starts, and the conduction signal whose off time is more than a certain time (for example, 1 second) is counted. ) reaches a predetermined number of times (for example, 3 times), it is determined that a person is...

AI Technical Summary

Problems solved by technology

[0008] However, the method for estimating the position of a person described in Patent Document 1 uses a monostable waveform to determine the position of a person in a predetermined area, so there is a problem that the possibility of erroneously estimating the position of a person is high.

[0009] In addition, in the air conditioner described in Patent Document 2, there is a problem that a person forgets to turn off the power supply, and the low-load operation will continue even if there is no one there. Therefore, there is a problem that a lot of power is wasted.

[0010] In addition, in the air conditioner described in Patent Document 3, in the case of setting the start-up timing, when no one is detected even if it reaches the start-up timer setting time, the operation is not started, so energy saving can be achieved, but for normal operation There is no effect when there is no one in ("regular operation" refers to "operation instructed by the user")

In addition, when the human body detection sensor detects falsely when no one is present, the air conditioner always continues to operate, which still causes a problem of a large amount of power waste.

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