JPH0646105B2 - Automatic air conditioning ventilation fan - Google Patents

Description

Description: [Industrial application] The present invention relates to an automatic air-conditioning ventilation fan, for example, which detects the entrance and exit of a person in a specific room by an infrared detector and automatically performs ventilation operation. It is a thing.

[Prior Art] Conventionally, an air-conditioning ventilation fan has been manually operated and stopped by a main body or a switch installed at another position apart from the main body. When ventilating the room, it is required to completely discharge dirty air, odor, humidity, etc., but due to the troublesome manual operation,
Run the ventilator only when the room is in use,
Alternatively, the vehicle was always driven.

[Problems to be solved by the invention] However, in the case where the ventilation fan is operated only when the above room is used, the dirty air is retained by turning off the switch early, and the switch is turned off. There is a problem that electric power may be wasted due to forgetfulness, and the above-mentioned constant operation requires maintenance costs.

In addition, installation and wiring of various detectors are required, which causes a problem of high construction and management costs.

On the other hand, looking at this kind of technology in the patent publication,
The technique of an automatic air-conditioning ventilation fan having an infrared detector disclosed in JP-A-7-147599 can be mentioned. The technology of this publication is such that the infrared thermosensitive element senses the heat of the human body and continues to drive the arousal device while continuing to sense it, and when a person is gone, it is driven for a predetermined time and then stopped. When the temperature is higher than the body temperature, the operation cannot be performed, and there is a problem that the operation is continued until the room temperature decreases.

In addition, the technology of an infrared detector having an infrared light condensing mechanism and a windshield mechanism disclosed in Japanese Utility Model Laid-Open No. 61-50232 can be mentioned. Although the technique of this publication discloses the technique of an infrared detector having an infrared condensing mechanism and a windshield mechanism, it does not have a function of automatically and accurately performing ventilation operation for a predetermined time or longer.

That is, even with both publications, there is no disclosure of a function capable of automatically and accurately performing ventilation operation for an appropriate time.

Therefore, the present invention has been made to solve the above-mentioned problems, and an automatic air-conditioning ventilation fan capable of performing a ventilation operation automatically and accurately for an appropriate time without depending on a manual operation. The challenge is to provide.

[Means for Solving Problems] An automatic air-conditioning ventilation fan according to the present invention detects the change in infrared energy and outputs the detection signal, and the magnitude of the detection signal from the infrared detector. A comparator for judging and operating based on the judgment result of the comparator,
It is provided with a re-trigger type residual timer that stops after a predetermined time has passed, and a drive unit that is controlled by the residual timer and that controls the operation of the ventilation fan.

[Operation] The automatic air-conditioning ventilation fan according to the present invention detects and outputs a voltage signal proportional to the amount of change by the differential operation of capturing the change in infrared energy obtained by the infrared detector. When the comparator judges this infrared detection signal and judges that the infrared energy has increased, the re-trigger type residual timer is activated, and the fan of the ventilation fan main body operates for a predetermined period of time via the drive means by the output signal of the residual timer. Is.

In particular, since the re-trigger type residual timer sets a predetermined operation time each time a change in infrared energy is detected, the predetermined operation time can be reliably ensured.

[Embodiment] FIG. 1 is a block diagram showing an overall configuration diagram of an embodiment of an automatic air conditioning ventilation fan according to the present invention.

In the figure, (1) is an infrared detector that detects a change in infrared energy of a human body and / or flame, (2) is a signal amplifier that amplifies the output signal of the infrared detector (1) as necessary, (3 ) Is a comparator for comparing and detecting the output signal of the signal amplifier (2), (4) is a detection sensitivity adjuster for giving a detection sensitivity reference to the comparator (3), and (5) is a comparison detection output of the comparator (3) A remaining timer that sets a predetermined time period based on the signal, and (6) is a drive unit that drives the fan (7) of the ventilation fan based on the output of the remaining timer (5).

FIG. 2 is an external perspective view of an automatic ventilation fan for a duct of the toilet when the one shown in FIG. 1 is applied to the automatic ventilation fan of the toilet.

In the figure, (1) is an infrared detector provided on the ventilation fan, (8) is the ventilation fan body, (9) is the front panel of the ventilation fan into which the air to be ventilated flows, and (10) is the ventilation duct connection port. Show.

FIG. 3 is a diagram showing details of the infrared detector (1) shown in FIGS. 1 and 2, (a) being an external perspective view and (b) being I.
It is a sectional view of the -I surface.

In the figure, (11) is a pyroelectric infrared sensor that outputs a change in incident infrared energy as a voltage signal (that is, performs a differential operation), (12) is an infrared incident window, and (13) Is its pyroelectric infrared sensor (11)
Is a condensing mirror as an infrared condensing mechanism for defining the infrared detection field of view and increasing the amount of incident infrared rays in the front direction, and the mirror surface has a conical shape. Reference numeral (14) is a protective cover as a windshield mechanism made of a material such as polyethylene or polypropylene that transmits infrared rays radiated from the human body. (15) is a case with a high degree of airtightness in order to suppress the influence of disturbance due to air flow and temperature change around the pyroelectric infrared sensor (11), and (16) is the electricity of the pyroelectric infrared sensor (11). It is a connection terminal.

FIG. 4 is a schematic view of the inside of the toilet when the duct automatic ventilation fan for the toilet shown in FIG. 2 is installed in the toilet.

In the figure, (17) represents the detection field of view of the infrared detector (1).

In general, all substances radiate infrared rays according to their respective temperatures at absolute temperatures of 0 ° k or higher, and the radiant light intensity (infrared energy) of infrared rays radiated as the temperature of a substance is lower, the wavelength of its peak value. Will be long. The pyroelectric infrared sensor (11) outputs a change in infrared energy incident on the infrared incident window (12) as a voltage signal having a magnitude proportional to the amount of change (that is, performs differential operation). is there. In the toilet, if the person is not present in the room, the change in the infrared energy incident on the infrared detector (1) is small and slow, so that the person enters the detection field (17), or Detection field of view (17)
It is possible to noticeably capture the change in infrared energy given by moving out or moving in.

At this time, the wavelength of infrared rays radiated from a person is about 1
It is 0 [μm]. Further, since the range of action of a person in the tray is limited, the detection field of view (17) having a field angle of about ± 30 degrees obtained by the condensing mirror (13) can be sufficiently supplemented. In addition, since the incident infrared energy from a person is inversely proportional to the square of the distance to the person, it is necessary to increase the concentration of infrared rays in the detection field in order to increase the detection distance. Since the detection distance is at most about 2 [μm], it can be sufficiently detected by the conical focusing mirror (13) having a higher focusing rate in the front direction.

Next, the operation of this embodiment will be described with reference to FIGS.

As described above, the infrared detector (1) provided in the ventilation fan operates differentially with respect to the incident infrared energy, so that when a person enters or leaves the detection visual field (17), A change in the voltage signal is output according to the movement of the person within the field of view. Since this output signal has a very small value, it is amplified by the signal amplifier (2) to a value that can be easily processed, if necessary. This signal amplifier (2) is composed of a bandpass filter of about 0.1 to 10 [Hz] and an amplifier of about 60 to 80 [dB] in order to select a signal corresponding to a human moving frequency. .
The signal amplified to an appropriate value is input to the next comparator (3). Here, by comparing the detection sensitivity reference value given by the detection sensitivity adjuster (4) with the magnitude of the signal output, it is determined whether or not the signal is a human signal. When it is determined that the signal is from a person, the remaining timer (5) is set to the initial state regardless of the state (ON or OFF) at this time, and the operation of the ON operation for a fixed time period is started. That is, the remaining timer (5) is the signal of the person when the person enters the toilet.
Is set to the initial state and turned on for a certain period of time,
When the person is moving in the toilet or leaving the toilet while this ON state continues or ends, the remaining timer (5) is set to the initial state again and the ON state is kept for a certain period. Become. That is, the remaining timer (5) is a retrigger type triggered by a human signal. Specifically, a retriggered monostable multivibrator is used. The drive means (6) is controlled by this residual timer (5),
While the remaining timer (5) is in the ON state, the driving means (6) is activated to operate the fan (7) of the ventilation fan. When the timer for a fixed time period expires and the remaining timer (5) is turned off, the fan (7) of the ventilation fan is stopped until a new signal is input by a person. The timer time of the remaining timer (5) is such that the offensive odor disappears after using the toilet (for example, 10 to 10).
It is also possible to set the timer time (about 30 minutes) and have the timer time varying function. The function of changing the timer time can be performed by, for example, a potentiometer,
These potentiometers are used for the front panel of the ventilation fan (9).
Alternatively, it can be provided as a remote control on the wall surface of the toilet or the like.

When the control of this embodiment is controlled by a microcomputer or the like, it may be controlled as shown in the flowchart of the main part of the main program of the automatic air-conditioning ventilation fan of this embodiment in FIG.

As described above, the automatic air-conditioning ventilation fan according to the present embodiment has the infrared condensing mechanism including the infrared condensing mirror (13) and the windshield mechanism including the protective cover (14), and has a highly hermetically sealed case that suppresses the influence of disturbance. An infrared detector (1) housed in (15), a comparator (3) for determining the magnitude of the infrared energy detected by the infrared detector (1) and determining the magnitude thereof, and the comparator (3). ) A residual timer (5) that operates based on the determination result of (1) and stops after a predetermined time has passed;
And a drive means (6) for controlling the operation of the ventilation fan, which is controlled by the operation of the remaining timer (5).

Therefore, the infrared detector (1) is provided, the change of the infrared rays in the detection visual field is detected, and the operation of the ventilation fan main body (8) is automatically controlled based on the detection signal. Therefore, the ventilation fan main body (8) can be operated only when needed for an appropriate time to perform efficient ventilation, which can contribute to energy saving. Further, since the manual operation part is not required, the installation work of the manual operation part on the wall or the like is not required unlike the conventional case, and the installation work of the ventilation fan main body (8) can be simplified.

In addition, the infrared thermosensitive element, which could not be solved by the technology disclosed in the publication published in the conventional example, senses the heat of the human body, and even when the person disappears, when the ambient temperature is higher than the body temperature, the room temperature is The problem of continuing the operation until the temperature drops is that the infrared detector (1) of the present embodiment is provided, the change of infrared rays in the detection visual field is detected, and the ventilation fan main body (8) is operated based on the detection signal. It can be operated by automatically controlling the temperature, and if the temperature change does not occur without being affected by the ambient temperature, it can operate, the temperature of the human body and clothing can be changed, and it can be automatically and accurately for a predetermined time or more. Ventilation operation can be performed.

It should be noted that, in the above-mentioned embodiment, the case where the infrared detector (1) is provided with the conical infrared converging mirror (13) has been described, but instead of the infrared converging mirror (13), a concave mirror or a multi-division concave mirror is used. The same operation can be expected in the case of the infrared detector (1) that collects infrared rays using the lens provided on the protective cover (14).

Further, in the above-mentioned embodiment, the case of the ventilation fan which detects the person in the toilet and automatically operates is described. However, the optical filtering characteristic that catches the change of flame, that is, 4.3 [μ]
m] When an infrared detector (1) provided with a protective cover (14) or a pyroelectric infrared sensor (11) itself that has a filtering characteristic that allows passage of light of only the wavelengths around it is automatically detected by an occupant. It is possible to obtain a ventilation fan that operates automatically by detecting changes in infrared rays due to fire, such as ignition and extinction of lighters and stoves instead of driving.

If such an optical filtering characteristic allows only light having a wavelength of about 10 [μm] to pass therethrough, it is possible to better detect the entrance / exit or movement of a person. Furthermore, the first
The block diagram shown is usually installed inside the ventilation fan body (8).

[Advantages of the Invention] As described above, according to the automatic air-conditioning ventilation fan of the present invention, the infrared detector is provided, the change of infrared rays in the detection visual field is detected, and the operation of the ventilation fan is automatically performed based on the detection signal. Since it is configured so as to be controlled to, the ventilation fan can be operated for a proper time when necessary without performing manual operation, and efficient ventilation can be performed, which can contribute to energy saving. Then, it drives the re-trigger type residual timer, and in particular, the re-trigger type residual timer sets the predetermined operation time each time a change in infrared energy is captured, so it operates at the time of the final detection. Since the end time of is set, reliable and reliable operation can be expected.

In particular, as in the past, even if the infrared thermosensitive element senses the heat of the human body and no one is present, when the ambient temperature is close to the body temperature or higher, the problem of continuing the operation until the room temperature decreases It is possible to operate if the temperature change occurs without being affected by the ambient temperature, and it is possible to respond to changes in the temperature of the human body and clothes, and it is possible to automatically and accurately perform ventilation operation for a predetermined time or more. There is.

[Brief description of drawings]

FIG. 1 is an overall configuration block diagram of an embodiment of an automatic air conditioning ventilation fan according to the present invention, FIG. 2 is an external perspective view of an automatic ventilation fan for a duct of a toilet, and FIG. 3 (a) is an external perspective view of an infrared detector, FIG. 3 (b) is a sectional view of the infrared detector, FIG. 4 is a schematic view of the inside of a toilet in which an automatic ventilation fan for a duct of a toilet is installed, and FIG. 5 is a microcomputer of the automatic air conditioning ventilation fan of the embodiment of the present invention. It is a flowchart of the main part of the main program when controlling. In the figure, 1 is an infrared detector, 3 is a comparator, 5 is a remaining timer, 6: is driving means, 7 is a fan, 8 is a ventilation fan main body, 11 is a pyroelectric infrared sensor, 13 is a condenser mirror, and 14 is a protective cover. In the drawings, the same reference numerals and symbols indicate the same or corresponding parts.

Claims (1)

[Claims] 1. An infrared detector that detects a change in infrared energy and outputs a detection signal thereof, a comparator that determines the magnitude of a detection signal from the infrared detector, and a determination result of the comparator. An automatic air-conditioning ventilation fan, comprising: a re-trigger type residual timer that operates in response to a predetermined period of time and stops, and drive means that is controlled by the residual timer and that controls the operation of the ventilation fan.