[0054] [Embodiment 1]
[0055] The following is based on Figure 1 ~ Figure 7 (b) An embodiment of the present invention will be explained.
[0056] figure 1 It is an external perspective view of the heater 1 as an electric device of the first embodiment of the present invention. figure 2 Yes figure 1 A cross-sectional view along the line AA. image 3 Yes figure 1 The cross-sectional view of the BB line.
[0057] Such as Figure 1 to Figure 3 As shown, the heater 1 has an operating part 2 on the upper surface of the main body, a human sensor 3 and a blow-out port 4 on the front of the main body, and a suction port 5 on the back of the main body. The operation unit 2 includes, for example, a switch for switching operation contents such as air blowing operation and heating operation, a switch for switching operation intensity such as strong operation or weak operation, and the like. The human sensor 3 is located on the upper part of the front of the main body, and detects the human body and outputs a signal.
[0058] The air outlet 4 is located below the human sensor 3 and blows out clean air. The blower outlet 4 is provided with upper and lower louvers 6 for changing the direction of the wind, and a louver handle 7 for adjusting the direction of the upper and lower louvers 6. The suction port 5 is located at the lower part of the back of the main body and sucks air into the inside. The suction port 5 is provided with a filter 8 for removing dust from the sucked air. In addition, a gripping portion 9 that facilitates the movement of the heater 1 is provided on the upper part of the back of the main body, and the power cord 10 is drawn out from the lower part of the back of the main body.
[0059] On the other hand, the heater 1 includes inside the main body: a sirocco fan 11 that takes in air from the suction port 5, a fan motor 13 that drives the sirocco fan 11, a fan case 12 that forms a flow path for air, and a heating and taking-in Air heater 14 etc.
[0060] The sirocco fan 11 is installed inside the fan housing 12. The air taken in by the sirocco fan 11 is guided to the blowing port 4 through the inside of the fan housing 12. An airflow guide 15 that guides air to the air outlet 4 is provided in the inside of the fan case 12, and a heater 14 is provided in the air outlet portion of the fan case 12.
[0061] Figure 4 It is a block diagram showing the configuration of each element of the heater 1 described above. Such as Figure 4 As shown, the control system for controlling the heater 1 includes a human body detection unit (detection unit) 20 including at least a human sensor 3, a human body detection control unit 30, a main body control unit 40, and the like.
[0062] The human-sensing sensor 3 includes, for example, a pyroelectric sensor, etc., and when a human body is detected in its field of view, it responds to changes in heat (infrared rays) and outputs a signal. The human sensor 3 captures changes in heat (infrared rays) generated by human movement and outputs a signal. The signal from the human detection sensor 3 becomes a Low level when there is no human body movement, and when there is a human body movement, it fluctuates up and down between a low level and a high level.
[0063] The human body detection unit (detection unit) 20 obtains the output value (detection signal) from the human sensor 3 every 25 milliseconds, determines the presence or absence of human detection based on the output value obtained in the past 10 times, and outputs a signal indicating the determination result. Here, in the case of 10 times, for example, when the "high level" is 4 times or more, it is determined that the human detection is "present", and when it is 3 times or less, it is determined that the human detection is "absent". The human detection unit 20 outputs a high-level signal indicating that the human detection is "presence" when it is determined that the human detection is "presence", and when it is determined that the human detection is "absent", it outputs a low level that indicates that the human detection is "absent" Level of the signal.
[0064] The human body detection control unit 30 determines the presence/absence (presence or absence) of a human based on the signal output from the human body detection unit 20, determines the stop/start of the operation of the heater 1, and instructs the main body control unit 40. The human body detection control unit 30 includes an output value acquisition unit 31, a motion degree determination unit (degree determination unit) 31, a non-detection time measurement unit (measurement unit) 33, an operating time determination unit (determination unit) 34, presence/absence (presence or Absence) determination unit (not in determination unit) 35 and so on.
[0065] The output value acquisition unit 31 acquires the output value from the human body detection unit 20 every 0.1 second (acquired as "presence" for human detection/as "absence" for human detection). The acquired output value corresponding to at least the determination time T0 described later is held in a memory or the like. In addition, in the following, the case where the output value acquisition unit 31 acquires the output value of human detection as "presence" or human detection as "absence" from the human detection unit 20 is also expressed as the detection of human detection as "presence" or human detection as "presence". no".
[0066] The exercise degree determination unit 32 refers to the output value acquired and held by the output value acquisition unit 31, calculates the total time that the person detected as "present" within the most recent determination time T0 (the first predetermined time), and determines the person based on the total time The degree of exercise.
[0067] The determination time T0 is, for example, 5 minutes. The exercise degree judging unit 32 calculates the number of acquisitions of human detection as "presence" based on the output value in the past 5 minutes corresponding to the most recent determination time T0, and multiplies the acquired number of acquisitions by 0.1 second as the acquisition period ts. Out the total time. For example, if the number of acquisitions of human detection as "presence" in the past 5 minutes is 500 times, the total time becomes 50 seconds of 500 times×0.1 seconds.
[0068] The exercise degree determination unit 32 determines the degree of exercise of the person based on the ratio of the total time during which the person is detected as "presence" to the determination time T0. Here, the total time is compared with the determination threshold, and it is determined whether the person is moving more or less.
[0069] For example, within the judgment time T0 of 5 minutes, if the total time for human detection as "presence" is, for example, 10% or more of 30 seconds (judgment threshold), it is judged that the person is moving too much. If the human detection is "presence" If the total time is less than 30 seconds (determination threshold), it is determined that there is little human movement. In addition, the determination threshold value may be configured to be appropriately set in accordance with the usage method or lifestyle of the user of the heater 1.
[0070] In this embodiment, the exercise degree determination unit 32 recalculates the total time for the detection of the person as "presence" within the most recent determination time T0 every time the output value acquisition unit 31 detects that the person is "presence", and determines the person The degree of exercise. In this way, every time a person is detected as "presence", in the state of human movement, the movement of the person within the most recent determination time T0 is always used as the object to determine the degree of human movement. Therefore, for example, After the operation of the fan 1, the total time for the person to be detected as "presence" is calculated every time the determination time T0 elapses, and the determination can be made with higher accuracy.
[0071] The non-detection time measurement unit 33 refers to the output value acquired and held by the output value acquisition unit 31, and calculates the non-detection time during which "presence" of human detection has not been continuously detected since the last detection of human detection as "presence".
[0072] The operation time determination unit 34 determines the operation time T1, which is the operation on time T1, for the time that the heater 1 continues to operate from the detection of the person as "absence" based on the determination result of the exercise degree determination unit 32, and the above-mentioned operation when the degree is high The turn-on time T1 is shorter than the above-mentioned operation turn-on time T1 when the degree is low. In other words, the operation on-time T1 corresponds to the absent determination time from the last detection of "presence" until the absence of the heater 1 is determined to be stopped.
[0073] When it is determined that there is a lot of human exercise, the operation time determination unit 34 determines the operation on-time T1 to be a short time such as one minute, for example. On the other hand, when it is determined that there is little human exercise, the operation on-time T1 is determined to be as long as, for example, 5 minutes. In addition, the operation ON time T1 may be configured to be appropriately set according to the usage method or lifestyle of the user of the heater 1.
[0074] The presence/absence determination unit 35 determines that there is no one (absence) when the non-detection time measured by the non-detection time measurement unit 33 reaches the operation on time T1 determined by the operation time determination unit 34, and instructs the main body control unit 40 Stop of operation. In addition, the presence/absence determination unit 35, after determining that it is absent and instructs the main body control unit 40 to stop the operation, when the output value acquisition unit 31 detects that a person is detected as "presence", it determines that there is a person (presence), and The main body control unit 40 instructs the start of the operation.
[0075] Figure 5 , Image 6 It is a flowchart showing an example of the control operation of the human body detection control unit 30 of the heater 1.
[0076] The human body detection control unit 30 sets the human detection sensor 3, and when the human body detection unit 20 outputs a signal indicating the determination result of the presence or absence of human detection, it is determined as "YES" in S1 and then proceeds to S2 and S3. In S2 and S3, the human body detection control unit 30 sets 5 minutes (an example) as the determination time T0 and 0.1 second (an example) as the acquisition period ts of the output value from the human body detection unit 20, and starts the countdown.
[0077] In S4, the human body detection control unit 30 determines whether or not 5 minutes as the determination time T0 has passed (whether the counter set in S2 has become 0). Five minutes have elapsed after the human-sensing sensor 3 starts to detect, and when it is judged as "YES", it proceeds to S8. On the other hand, the human body detection control unit 30 has passed 5 minutes from the start of the detection by the human sensor 3, and it is judged as "No" in S4, and then proceeds to S5.
[0078] In S5, the human body detection control unit 30 determines whether or not 0.1 second, which is the acquisition period ts of the output value from the human body detection unit 20, has passed (whether the counter set in S3 or S7 described later becomes 0). S5 is repeated until the judgment is "yes". When it is judged as "YES" in S5, the process proceeds to S6, and the output value from the human body detection unit 20 is obtained (human detection is "present"/human detection is "absent"), and then the process proceeds to S7. In S7, the human body detection control unit 30 sets 0.1 second as the acquisition period ts for the next acquisition of the output value from the human body detection unit 20, and starts the countdown. Then return to S4.
[0079] After 5 minutes have elapsed after the human sensor 3 starts to detect, in S8, which is determined to be "Yes" in S4, the human body detection control unit 30 calculates the total of human detection as "present" within the determination time T0 (within 5 minutes) For the time, it is judged whether it is 30 seconds or more (one example) as the judgment threshold.
[0080] When the total time for human detection as "presence" is 30 seconds or more, and the human body detection control unit 30 determines that it is "YES" (there is a lot of human movement), the process proceeds to S9. In S9, the human body detection control unit 30 sets the operation on-time T1 to a short, for example, one minute, and starts the countdown. Then enter S11.
[0081] On the other hand, when the total time for human detection as "presence" is less than 30 seconds, and the human body detection control unit 30 judges as "No" (there is little human movement), the process proceeds to S10. In S10, the human body detection control unit 30 sets the operation on-time T1 to a long, for example, 5 minutes, and starts the countdown. Then enter S11.
[0082] In S11, the human body detection control unit 30 determines whether or not 0.1 second, which is the acquisition period ts of the output value from the human body detection unit 20, has passed (whether the counter set in S7 becomes 0). Repeat S11 until the judgment is "Yes". When it is determined as YES in S11, the process proceeds to S12, and the human body detection control unit 30 sets 0.1 second as the acquisition period ts for the next acquisition of the output value from the human body detection unit 20, and starts the countdown. Then go to S13.
[0083] In S13, the human body detection control unit 30 obtains the output value from the human body detection unit 20 (human detection is "present"/human detection is "absent"), and the process proceeds to S14. In S14, the human body detection control unit 30 determines whether or not the output value acquired by the human body detection unit 20 is "present" for human detection. When it is judged as "YES" in S14, the process returns to S8, and the total time of human detection as "presence" in the past 5 minutes is calculated again, and it is judged whether it is 30 seconds or more as the judgment threshold.
[0084] As a result, the human body detection control unit 30 can re-determine the degree of human movement every time the human body is detected as "present" based on the output value of the human body detection unit 20, and re-modify the operation on time T1 in S9 or S10 .
[0085] On the other hand, when it is judged as “No” in S14, it proceeds to S15, and the human body detection control unit 30 judges whether the operation on time T1 set in S9 or S10 has passed (whether the counter set in S9 or S10 Becomes 0). When it is judged as No in S15, return to S14. The processing of S8 to S15 is repeated until it is judged as "YES" in S15.
[0086] And, when the operation on time T1 set in S9 or S10 has elapsed without detecting the human being detected as "presence" and the determination is "YES" in S15, the process proceeds to S16. In S16, the human body detection control unit 30 instructs the main body control unit 40 to stop the fan motor 13, the heater 14, and the like. Thus, the operation of the heater 1 is stopped. Then go to S17.
[0087] In S17, the human body detection control unit 30 determines whether or not 0.1 second, which is the acquisition period ts of the output value from the human body detection unit 20, has elapsed (whether the counter set in S12 becomes 0). S17 is repeated until the judgment is "YES". When it is determined as YES in S17, the process proceeds to S18, and the human body detection control unit 30 sets 0.1 seconds as the acquisition period ts for the next acquisition of the output value from the human body detection unit 20, and starts the countdown. Then go to S19.
[0088] In S19, the human body detection control unit 30 obtains the output value from the human body detection unit 20 (human detection is "present"/human detection is "absent"), and the process proceeds to S20. In S20, the human body detection control unit 30 determines whether or not the acquired output value from the human body detection unit 20 is "presence" for human detection. When it is judged as "No" in S20, it returns to S17, and the processing of S17 to S20 is repeated until it is judged as "Yes" in S20.
[0089] When it is determined as YES in S20, the process proceeds to S21, and the human body detection control unit 30 instructs the main body control unit 40 to restart (recover) the operation of the fan motor 13 and the heater 14, etc. Thus, the operation of the heater 1 is restarted.
[0090] Figure 7 (a) and (b) are graphs showing the signal detection state of the human body detection control unit 30 and the operating state of the heater in time series, Figure 7 (a) It indicates that the degree of human movement is high, Figure 7 (b) indicates a situation where the degree of human movement is low.
[0091] Such as Figure 7 As shown in (a), when there is a lot of human motion and the total time for human detection as "presence" acquired by the human body detection control unit 30 is greater than the determination threshold (30 seconds in the example), the operation on time T1 Set a short one, for example, 1 point. The heater 1 stops the heater 1 when one minute has elapsed after the human body detection control unit 30 finally obtains that the person is detected as "presence".
[0092] In a state where there is a lot of human motion, if the human being detected as "presence" is not detected within a short period of about 1 minute, the possibility of absence is high. Therefore, when it can be determined that there is a lot of human exercise in this way, the operation can be stopped in a short time when it is absent by setting the operation on-time T1 short.
[0093] On the other hand, such as Figure 7 As shown in (b), when there is little human movement and the total time for human detection as "presence" acquired by the human body detection control unit 30 is less than the determination threshold (30 seconds in the example), the operation is turned on for T1 Set the length to 5 points, for example. The heater 1 stops the heater 1 after 5 minutes have passed after the human body detection control unit 30 finally acquired the human detection as "presence".
[0094] In a state where there is little human movement, it will sufficiently happen that no human being detected as "presence" within a short period of about 1 minute. Therefore, when a person is not detected as "presence" within a short period of about 1 minute, and the operation is stopped, there will be a problem that the operation is stopped randomly despite the presence of a person. However, even in a state where there is little human movement, as long as it becomes a state where the human being detected as "presence" cannot be acquired within a long period of 5 minutes, the possibility of being absent is high. Therefore, in this way, when there is little human movement, by setting the operation on-time T1 longer, it is possible to avoid problems such as accidentally stopping the operation despite the presence of a human being, and to stop the operation when it becomes absent.
[0095] In addition, in the present embodiment, the degree of human movement is determined based on the proportion of the total time during which the person within the determination time T0 is detected as "present". As a result, there is no such a defect that the degree of movement of a person is determined based on the length of time when the movement of the person is not detected as in the structure of the aforementioned Patent Documents 1 and 2, and it is possible to appropriately determine the person's movement without contradiction. Degree of movement.
[0096] In addition, the heater 1 is exemplified as an electric device here, but it can also be applied to applications such as air-conditioning equipment, air cleaners, and lighting equipment.
