JPS60181530A - Congestion degree detecting device for air conditioning - Google Patents

Abstract

PURPOSE:To form a device, capable of controlling the air conditioning at a real time in accordance with the congestion degree of the people and keeping the optimum condition at all times by employing the congestion degree detecting device, measuring the number of people by infrared-rays emitted from human body. CONSTITUTION:The output signal 14a of a counting circuit 14 is outputted when the number of people in a field of view becomes higher than a predetermined value. The predetermined value of congestion degree is set in a plurality of stages in the counting circuit 14 and a plurality of output terminals are provided in the same circuit 14 while each terminal is connected with a monostable multivibrator 15 as well as a time detecting circuit 16 respectively and signals 17a, corresponding to each time circuit, is inputted into an air conditioning control unit 32. Accordingly, the control of air conditioning may be effected at real time with respect to the normal congestion of people by the signal 17a in accordance with the congestion degree in the air conditioning control unit 32 when the predetermined time of the time detecting circuit 16 is set properly. When fire or warm- air is used in a room or the optimum control has not been effected by the signal 17a, the control is effected by the signal 17b after detecting the temperature rise of the room.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to measure the number of people from infrared rays emitted by human bodies, determine the degree of crowding, and optimally control air conditioning in buildings, department stores, etc.

For the purpose of accurately detecting the number of people from infrared rays emitted by human bodies with a simple and inexpensive configuration, one applicant previously filed Japanese Patent Application No. 57-172379 ``Crowding Level Detection Device'' and Japanese Patent Application No. 57-192763. We are proposing the ``Crowdness Detection Device''. Detailed explanations of these components will be omitted, but an example of their basic configuration is shown in FIG.

In Fig. 1, 1%1 is an optical system housing case that houses a condenser lens 2, a flat reflecting mirror 3 that rotates at a constant period, and a detection element 4 that responds to changes in incident infrared rays, and 5 is a flat reflecting mirror. 3 is a scanning motor that drives 7, a preamplifier 18
is a bandpass filter for removing noise components, etc.; 9
The main amplifier 110 is a comparator that outputs a pulse signal with an input signal of a predetermined level or higher, 11 is a multiplexer circuit that outputs a sequence of clock pulses corresponding to the pulse width of the pulse signal, and 14 is a counting circuit. In the above configuration, the field of view is set by detecting the rotational position of the plane reflector 6 using a disc with a slit (not shown) installed coaxially with the plane reflector 6 and a photo interrupter (not shown). Using the relationship that the width of the waveform of the output signal of the detection element 4 obtained by scanning the field of view with the reflecting mirror 5 is approximately proportional to the number of people G to be measured, the number of clock pulses that is the output of the multiplexer 11 is counted, It measures the number of people within the field of view.

Note that FIG. 1 shows only one channel with one detection element 4, and illustrations of other channels are omitted.

On the other hand, the configuration of air conditioning equipment in buildings, department stores, etc. is generally as shown in FIG. 2, for example.

In Fig. 2, 21 is the room, 22 is the outlet, 23 is the supply air duct, 24 is the exhaust duct, 25 is the blower, 26 is the air conditioner, 26a is the air heater, 26b is the air cooler,
26c is an air filter 127, a hot water boiler, 28 is a refrigerator, 29 is an outside air intake duct, 30 is a cooling tower, 31 is a temperature detector, 62 is an air conditioning control device, 66 is an air volume regulator, 34
35 is a cold water pipe 156 is a cooling water pipe 67
is the return air Talito. Here, the temperature detector 61 is generally a bimetal made of a combination of amber and brass, one shielded bellows, one diaphragm, etc., and the expansion, contraction, and expansion caused by temperature changes are extracted as physical displacements, and converted into electrical or pneumatic signals. The air volume is adjusted via the air conditioning control device 32 and the air volume controller 33, and the temperature in one room 21 is automatically adjusted. In addition, recently some S temperature detectors use resistance temperature detectors or thermocouples to obtain fast response, but in any case, these are all devices that control temperature by capturing changes in room temperature. .

However, for example, if a department store suddenly becomes crowded in the summer, there is a time delay before the room temperature rises (usually within 30 minutes to 1 hour, depending on the indoor space).
time), room temperature control will be delayed by that amount, and people will feel extremely uncomfortable during that time. Generally, the total energy radiated from the human body is approximately 10 to 100 W per person.
Since the radiant energy decreases in inverse proportion to the square of the distance, if we are trying to reduce the time delay in S temperature control, the method of controlling temperature by capturing indoor temperature changes as described above is extremely difficult. Therefore, many temperature detectors must be placed indoors. Even if a large number of humidity detectors are installed, some delay is unavoidable, and in crowded situations, people come into close contact with each other, and people partially receive large amounts of radiant energy from their surroundings, resulting in temperature fluctuations. It causes discomfort even before the detector controls it. This will cut off the purchasing line of customers at department stores, etc.
This is a big disadvantage. Therefore, in the past, the air conditioner had to be operated manually in such cases, making it completely useless as an automatically controlled air conditioner.

In view of the above points, the present invention provides an apparatus that uses the congestion level detection device to perform air conditioning control in real time according to the level of congestion, thereby constantly maintaining an optimal condition.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a diagram showing the configuration of the congestion level detection device for air conditioning control according to the present invention, and the same parts as in FIG. 1 are designated by the same reference numerals.

In FIG. 3, 114a is an output signal of the counting circuit 14, which is output when the number of people within the visual field exceeds a predetermined value. 15 is a monostable multivibrator which, when signal 14a is input, pulses 1 for a set time (at least one scan period or more).
5a is output. 16 is a time detection circuit (described later).
When the pulse 15a continues for a predetermined time, a signal 16a is output. That is, the time detection circuit 16 outputs a signal 16a when a certain congestion within the visual field continues for a predetermined period of time. This is to avoid detection when there is a temporary increase in the number of people passing through the room. 6 is a temperature sensor for measuring the indoor temperature; for example, a thermistor or a temperature sensor controller is used. 12 is a level shift amplifier, 12a is its output, and 16 is a signal 1 when the ambient temperature rises and the temperature continues to be above a predetermined value 1 for a predetermined time.
This is a temperature change detection circuit (described later) that outputs '5a. 1
An output circuit 7 outputs a control signal 17a or 17b to the air conditioning control device 32 in response to the human power signal 16a or 13a. In the air conditioning control device 32, the signal 17a or 17
The air volume of the air conditioner is controlled according to b.
In the figure, the output of the counting circuit 14 is represented by one output, but
A plurality of output terminals are provided by setting a predetermined value of the degree of congestion in a plurality of stages, and a monostable multiviberator 15 and a time detection circuit 16 are connected to each of them, and a signal 17 corresponding to each is connected.
a is input to the air conditioning control device 32. Therefore, in the air conditioning control device 62, if the predetermined time of the time detection circuit 16 is appropriately set for normal crowding, real-time control is performed by the signal 17a according to the degree of crowding, and a fire can be started indoors. or when using hot air or signal 17a.
If optimization cannot be achieved, a temperature rise of 1 level is detected and control is performed using the signal 17b.

Figure 4 is a diagram showing the circuit configuration of the time detection circuit 16. In Figure 1, R1-R6 are resistors, al is a capacitor 141 is a diode, 42 is an FIT transistor, transistors 146 and 44 are operational amplifiers, and transistor 45 is a positive transistor SP. The power supply 1N is a negative power supply, the operational amplifier 43 forms an integrator with the resistor R5 and the capacitor 01, and the operational amplifier 44 forms an integrator with the resistors R3 and R4.
The comparator is composed of Now, when there is no signal 15a, the transistor 45 is OFF N, so FIT
) The transistor 42 is turned on, and the input and output of the operational amplifier 43 are connected via the resistor R2, so R
6>R, (R2 should be selected as a small resistance of several tens of ohms) 2, then the output voltage V is ■. -Ti-v8-q.

When No. 15a is input (however, it is a negative logic pulse), the transistor 45 is turned on, so the transistor 42 becomes O, FF, and the operational amplifier 43 becomes an integrator, and the voltage becomes V.
o'=t-fV, dt and 1 R5. Since the operational amplifier 44 constitutes a comparator, a signal 16a is output when Vo exceeds a threshold level determined by resistors R3 and R4. That is, when a certain degree of congestion continues for a predetermined time, a signal 16a is output, and this predetermined time can be arbitrarily set by changing the time constant or threshold level of the integrator.

FIG. 5 is a diagram showing the configuration of the temperature change detection circuit 16, in which 51 is a comparator, 51a is its output, 52 is a monostable multivibrator, 52a is its output, and 56 is a fourth
This is a time detection circuit similar to the one shown in the figure. If the ambient temperature rises and exceeds a certain level, the comparator 51 outputs 51.
A is emitted, but if this is instantaneous, the signal 13a is not output, similar to the congestion level time detection circuit. Further, even if the signal 13a is continuous, the signal 13a is not outputted within the time set by the time detection circuit 56. In general, the ceiling is indoors #6-h, 71haγ≠1 mm is the middle surface hh
The temperature may temporarily rise due to the flow of the water, but according to the present invention, in such a case, it is not detected and unnecessary control can be avoided.

Although the above description has been made regarding the case where the indoor temperature rises (cooling), it goes without saying that the present invention can be similarly applied to the case where heating is performed.

As described above, according to the present invention, air conditioning can be controlled in real time according to the degree of indoor congestion, and even if temperature changes occur due to causes other than congestion, control can be performed in the same manner as before. This allows you to keep the room in optimal condition at all times.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of a conventional congestion level detection device, FIG. 2 is a diagram showing the configuration of an air conditioning equipment, and FIG. 6 is a diagram showing the configuration of a congestion level detection device for air conditioning control according to the present invention. , FIG. 4 is a diagram showing the configuration of the time detection circuit, and FIG. 5 is a diagram showing the configuration of the temperature change detection circuit. 60. Plane reflector 40. Detection element 51. Scanning motor 66. Temperature sensor 70. Preamplifier 90, main amplifier 89. Bandpass filter 100. Comparator 111. Multiplexer circuit 120. Level shift amplifier 130. Humidity change detection circuit 140. Counting circuit 151. Monostable multivibrator 1611 time detection circuit 170. Output circuit 210. room
Within 260. Air conditioner 310. Temperature detector 621. Air conditioning control device 331. Air volume regulator patent applicant Fujichik Co., Ltd. No. 11 Goto pot No. 21 No. 5 l No. 4 (2)

Claims (1)

[Claims] It is equipped with a detection element that responds to changes in incident infrared rays, and a scanning mirror that rotates at a constant cycle to scan a set field of view.1 The width of the waveform of the output signal of the detection element is converted into the number of people, Counting the number of people 1. Alternatively, in a device that determines the degree of crowding, a temperature change detection circuit that detects that a temperature change of more than a predetermined value continues for a predetermined time is provided for a time detection circuit that detects that congestion of a predetermined value or more continues for a predetermined time,
A congestion degree detection device for air conditioning control, characterized in that air conditioning equipment is controlled in accordance with the output of at least one of the time detection circuit and the temperature change detection circuit.