JP2017089957A - Ventilation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation device which achieves setting of proper retarding operation time of the ventilation device according to a usage state of a person, and which achieves an automatic operation of the ventilation device by human body detection and an optimum retarding operation of the ventilation device after retreat of the person.SOLUTION: A ventilation device 1 includes: a fan 2 for air exhaustion for exhausting air; a human detection sensor 3 for detecting a human body in a predetermined region and outputting a detection signal; timing means 4 for calculating staying time of a person in the predetermined region on the basis of the detection signal from the human detection sensor 3; and a control part for setting retarding operation time, which is the operation time of the fan 2 for air exhaustion after retreat of a person from the predetermined region on the basis of the staying time calculated by the timing means 4.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ventilator that automatically operates by detecting a human body within a predetermined area.

  Conventionally, a ventilator equipped with this type of human sensor starts operation of the exhaust fan when the human sensor detects a human body during normal operation. The human sensor no longer detects the human body.In other words, after the person leaves, the exhaust fan is operated only after a certain remaining operation time set to discharge the residual odor, and then the exhaust fan is operated. Stop (see, for example, Patent Document 1).

JP-A-2-33546

  Such a conventional ventilator has a problem that the operation of the ventilator does not match the actual use state and is not efficient because the remaining delay operation can be performed only for a predetermined time set in advance by a timer.

  An object of the present invention is to solve the above-mentioned problems and to provide a ventilator capable of performing the remaining delay operation for an appropriate time according to the actual use state.

  In order to achieve this object, the ventilator according to the present invention includes a human sensor that detects a human body in a predetermined area and outputs a detection signal, and the predetermined area based on the detection signal from the human sensor. A time counting means for calculating a residence time of a person in the vehicle, and a remaining operation time that is an operation time of the exhaust fan after the person leaves the predetermined area based on the residence time calculated by the time measurement means. It is set as the structure of the ventilator provided with the control part to set.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to set the suitable delay operation time of the ventilator according to a person's use condition, the optimal operation of the ventilator by human body detection, and the optimal delay operation after a person's leaving. The effect that it can be realized is obtained.

The block diagram of the ventilator which concerns on embodiment of this invention. The control flowchart of the judgment of the residence time and the setting of the remaining operation time according to the embodiment of the present invention. The figure which shows the output voltage and human body detection determination threshold value of the human sensitive sensor which concern on embodiment of this invention.

  The ventilation device according to the present invention includes an exhaust fan that exhausts air, a human sensor that detects a human body in a predetermined area and outputs a detection signal, and a detection signal from the human sensor. A time measuring means for calculating the residence time of the person at the time, and a remaining operation time that is the operation time of the exhaust fan after the person leaves the predetermined area based on the residence time calculated by the time measuring means It is set as the structure of the ventilator provided with the control part to perform.

  Thereby, the automatic operation of the ventilator by human body detection and the optimum remaining operation after the person leaves can be realized.

  The control unit may calculate the remaining delayed operation time based on the residence time.

  Thereby, the remaining slow operation time of a ventilator can be changed according to a person's use state (residence state).

  In addition, the remaining delay operation time includes a fixed time and a variable time, and the control unit calculates a variable time based on the residence time, and calculates a sum of the calculated variable time and the fixed time. The remaining operation time may be used.

  Thereby, the said remaining delay operation time of the suitable ventilation apparatus according to a person's use condition can be changed.

  Further, a comparison unit that compares a predetermined threshold set in advance with the residence time may be provided, and the control unit may select the remaining delayed operation time based on a comparison result by the comparison unit.

  The control unit starts the operation of the exhaust fan when the human sensor is in a human body detection state, and the remaining slow operation set when the human sensor is in a human body non-detection state. The operation of the exhaust fan is continued according to time, and the operation of the exhaust fan is stopped after the remaining slow operation time has elapsed.

  Furthermore, the time measuring means starts measurement of a detection time counter when the human sensor is in a detection state of the human body, and measures the detection time counter when the human sensor is in a non-detection state of the human body. The residence time may be calculated after completion.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention. In addition, throughout the drawings, the same portions are denoted by the same reference numerals, and the second and subsequent descriptions are omitted. Furthermore, in each drawing, the description of the details of each part not directly related to the present invention is omitted.

(Embodiment)
The ventilator 1 according to the embodiment of the present invention is attached to a wall surface in a predetermined area, and is used when the air in the predetermined area is discharged outside the predetermined area. The term “predetermined area” as used herein refers to, for example, a room, and specifically refers to a space such as a toilet, bathroom, dining room, and living room.

  First, the structure of the ventilation apparatus 1 is demonstrated using FIG.

  The ventilation device 1 includes a human sensor 3, a timing unit 4, a comparison unit 5, a control unit 6, and an exhaust fan 2.

  The human sensor 3 is provided in a direction in which a person staying in the room can be detected. For example, an infrared sensor is used.

  The time measuring means 4 calculates the residence time of the person in the room. In other words, the time measuring means 4 receives the signal that the human sensor 3 outputs when the person enters the room, and starts counting the detection time counter. Then, the time measuring means 4 receives a signal from the human sensor 3 indicating that the human body is in a non-detection state when a person comes out of the room, and ends the time measurement of the detection time counter. That is, the detection time counter indicates the residence time.

  The comparison means 5 compares a predetermined threshold set in advance with the residence time calculated by the time measuring means 4 and determines whether it is greater than or less than the predetermined threshold.

  The control unit 6 sets the remaining operation time that is the operation time of the exhaust fan 2 from the determination result by the comparison unit 5.

  The exhaust fan 2 continues to operate according to the remaining delay operation time set by the control unit 6 after the human sensor 3 enters the non-detection state, and stops operation after the remaining delay operation time has elapsed.

  In the above configuration, a method for setting the remaining delay operation time of the ventilation device 1 according to the present invention will be described using the flowchart of FIG.

  No person enters the predetermined area, and the exhaust fan 2 is not energized, that is, is in a standby state (STEP 1).

  While in the standby state, the human sensor 3 constantly detects the person entering the predetermined area and transmits a signal indicating that the person is in the non-detection state to the control unit 6 (NO in STEP 2).

  When the human sensor 3 detects that a person enters the predetermined area, that is, enters the detection state, the control unit 6 starts the operation of the exhaust fan 2 (YES in STEP 2 → STEP 3). Here, for example, the fact that the output voltage changes when the infrared sensor detects a change in infrared rays generated from a person as the human sensor 3 is used. For example, as shown in FIG. 3, when there is no change in infrared (for example, 2 V), when the output voltage of the infrared sensor changes by more than a human detection determination threshold (for example, ± 0.45 V), it is a detection state A signal to that effect is transmitted to the control unit.

  When receiving a signal indicating that the detection state is detected from the human sensor 3, the control unit 6 starts counting the detection time counter (STEP 4).

  Until the person leaves the predetermined area, the human sensor 3 detects the movement of the person and generates a detection signal (YES in STEP 5).

  When a person leaves from the predetermined area, the human sensor 3 outputs a signal indicating that the person is in a non-detection state, so that the control unit 6 determines to leave (NO in STEP 5). At this time, it is confirmed that the person has left the room, and the control unit 6 stops counting of the detection time counter and calculates the residence time of the person by the time measuring means 4 (STEP 6).

  Next, the comparison means 5 compares the calculated residence time with a preset variation time Ty, and selects as follows based on the comparison result (STEP 7).

  If the comparison result by the comparison means 5 is equal to or longer than the variation time Ty, T + T2 is set as the remaining delay operation time (STEP 7 YES → STEP 9). Here, T is a fixed time. T2 is the fluctuation time. That is, the remaining operation time is composed of a fixed time and a variable time, and the minimum time that a person drives after leaving the room is the fixed time. On the other hand, the variation time is a time dynamically changed based on the residence time.

  If the comparison result by the comparison means 5 is less than the fluctuation time Ty, the residence time is further compared with the preset fluctuation time Tx (STEP 7 NO → STEP 8).

  If the comparison result by the comparison means 5 is equal to or longer than the variation time Tx, T + T1 is set as the remaining delay operation time (STEP 8 YES → STEP 10). Here, T1 is also a variation time, and T2> T1.

  When the comparison result by the comparison means 5 is less than the fluctuation time Tx, T is set as the remaining delay operation time (STEP 8 NO → STEP 11).

  Here, for example, the variation time Tx = 30 seconds and the variation time Ty = 90 seconds.

  As a result, a value obtained by adding a variation time (T1 or T2) selected and determined to a preset fixed time T (for example, 3 minutes) is set as the remaining delay operation time. Start the countdown. And the control part 6 will judge the stop of a ventilation apparatus, and will stop an operation | movement, when the remaining operation time becomes zero. During the countdown, the human sensor continues to monitor signal generation and prepares for the next person to enter the room. If the human sensor is in the detection state during the countdown, the remaining operation time is reset and the processing from the above STEP 2 is started.

  By repeating the above operation, it is possible to set an appropriate remaining operation time of the ventilator 1 according to the use state of the person, and the automatic operation of the ventilator 1 by human body detection and the use state of the toilet, etc. Accordingly, the remaining slow operation of the appropriate ventilation device 1 can be performed.

  In this embodiment, the variation times are Tx = 30 seconds and Ty = 90 seconds. However, different times may be used depending on the space of the predetermined area.

  According to the ventilator according to the present invention, it is possible to realize the automatic operation of the ventilator by human body detection and the optimum remaining delay operation after the person leaves. For example, assuming that the room is a toilet, it is possible to shorten the remaining operation time in the case of urine, and to increase the remaining operation time in the case of stool, that is, an appropriate setting. Moreover, it is possible to avoid false detection of the fragrance of the fragrance by using an odor sensor or the like.

  In the above-described embodiment, the example in which the control unit 6 selects the remaining operation time based on the comparison result by the comparison unit 5 has been described. In other words, there are three types of remaining slow operation: T, T + T1, and T + T2. However, not limited to the selection, for example, the control unit 6 may calculate the remaining operation time based on the residence time. That is, twice the residence time may be calculated and set as the remaining delay time. As a result, it is possible to set a fine remaining driving time.

  In addition, when the human sensor is in the detection state during the countdown, the remaining operation time is not reset, and the remaining time during the countdown is set to the fixed time T and the processing from the above STEP 2 is started. May be. When it is assumed that the residence time is odor, the remaining operation time can be appropriately extended.

  The ventilator according to the present invention makes it possible to set an appropriate remaining operation time of the ventilator according to the use condition of the person, and the optimum ventilator after the automatic operation of the ventilator by human body detection and the person leaving This makes it possible to realize the remaining delay operation. For this reason, it is useful not only in a toilet but also in a space such as a bathroom, a dining room, and a living room.

DESCRIPTION OF SYMBOLS 1 Ventilator 2 Exhaust fan 3 Human sensor 4 Time measuring means 5 Comparison means 6 Control part

Claims (6)

An exhaust fan for exhausting air;
A human sensor that detects a human body within a predetermined area and outputs a detection signal;
Time counting means for calculating the residence time of the person in the predetermined area based on a detection signal from the human sensor,
A ventilator comprising: a control unit that sets a remaining operation time, which is an operation time of the exhaust fan after a person leaves the predetermined area, based on the residence time calculated by the time measuring means. The controller is
The ventilator according to claim 1, wherein the remaining operation time is calculated based on the residence time. The remaining operation time is
It consists of fixed time and variable time,
The controller is
Calculate the variation time based on the residence time,
The ventilator according to claim 1 or 2, wherein a sum of the calculated fluctuation time and the fixed time is used as the remaining operation time. Comparing means for comparing a predetermined threshold set in advance with the residence time,
The controller is
The ventilator according to claim 1, wherein the remaining operation time is selected based on a comparison result by the comparison means. The controller is
When the human sensor detects the human body, the operation of the exhaust fan is started,
Continue operation of the exhaust fan according to the remaining slow operation time set when the human sensor makes the human body non-detection state,
The ventilation apparatus according to any one of claims 1 to 4, wherein operation of the exhaust fan is stopped after elapse of the remaining delay operation time. The timing means is
When the human sensor makes the human body in a detection state, the measurement of the detection time counter is started,
The ventilator according to any one of claims 1 to 5, wherein when the human sensor makes the human body in a non-detecting state, the measurement of the detection time counter is ended and the residence time is calculated.