JPH0718582B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an air conditioner that operates by detecting the presence of a person who acts on the indoor environment and dirt in the air. It is used for an air purifying device that collects smoke, dust, etc. contained in, and a ventilation device that exchanges indoor and outdoor air.

(B) Conventional technology As technology prior to the present application, Japanese Patent Publication No. 59-8725,
There is an air conditioner disclosed in Japanese Examined Patent Publication No. 61-24613. The air conditioner is automatically operated by detecting smoking in a room by detecting a reducing gas such as CO with a gas sensor formed of a metal oxide semiconductor containing SnO ₂ as a main component.

However, since the air conditioner is operated by detecting the reducing gas, when a person who does not smoke uses the room, an appropriate operation cannot be performed. Moreover, since the operation is started only after smoking is started, the smoke starts to drift to some extent in the room and the operation start is slow.

As a technique improved on this point, Japanese Utility Model Publication No. 62-18489 discloses an air conditioner that detects infrared rays emitted during smoking and starts driving. Although driving starts without delay, there is a problem that driving is not started unless smoking.

In addition, an air conditioner that starts operation when a person uses the room is Japanese Patent Application No. Sho 59-171280 (No. Sho 61-86627).
Of Microfilm. The air conditioner detects a person when the room is used and can keep the room clean by starting driving, but the person's detection detects smoking when the person is moving. It may be difficult to detect the degree of hand movement, and smoking may not be detected.

(C) Problems to be Solved by the Invention In the conventional technology, there are advantages and disadvantages in the automatic operation, and automatic air conditioning in the room is insufficient.

In view of the drawbacks of the prior art, the present invention, when smoking is performed, is automatically driven with a strength according to the degree of smoking quickly, and is automatically driven by a person using the room without smoking, other than smoking. Provided is an air conditioner that can be automatically operated even if the air is contaminated due to a cause and can perform a smooth and appropriate operation.

(D) Means for Solving Problems The present invention provides a human body sensor that detects a human movement in a non-contact manner, an air pollution sensor that detects dirt due to smoke, reducing gas, or the like in indoor air, and The operation is started by at least one of the detection output of the human body sensor detecting the movement of the person and the detection output of the air contamination sensor detecting the predetermined air pollution, and each of the sensors detects the movement of the person and the predetermined air movement. And the blower whose operation is stopped due to the fact that it no longer detects the dirt, and the blower strength of the blower is adjusted according to the detection output of the air dirt sensor, and the air generated by the blower is also adjusted. It is provided with a filter for collecting smoke, dust, etc. through which the flow passes.

(E) Operation According to the above configuration, the human body sensor detects the movement of the person to start the driving, and collects the dust and the like soared along with the movement of the person. Further, when the air becomes dirty due to smoking or the like, the air dirt sensor detects the dirt and automatically starts the operation with the strength corresponding to the degree of the dirt. Generally, before detecting smoking, the human body sensor detects the movement of a person and the blower has already started operation to move the air in the room.Therefore, the dirt of the air caused by smoking is put on the air flow. It can be detected earlier by the air pollution sensor.

When a person leaves the room or the air is purified, the human body sensor and the air pollution sensor stop detecting the movement of the person and the dirt on the air, and the operation of the blower is automatically stopped based on this.

(F) Embodiments The present invention will be described by embodying the configuration by taking an air purifier 5 which is a specific device of an air conditioner as an example.

FIG. 3 is a perspective view, and FIG. 4 is a cross-sectional view. The air purifier 5 has an air outlet 6 formed on one side of the upper surface, and a detachable suction grill body 7 formed on the front portion. A dispersion plate 8 is installed on the inner surface of the suction grill body 7 to divide the sucked air flow A into both sides. A breathable filter support plate 10 is arranged in the main body case 9 facing the dispersion plate 8. The filter support plate 10 is formed of a wire mesh lath plate and is grounded as shown in FIG. A fiber filter and a deodorizing filter, which will be the air conditioning unit 4, are laminated and supported on the filter support plate 10. The airflow A is dispersed from the suction grill body 7 by the dispersion plate 8 and is applied to the main body case 9 portions located on both sides of the dispersion plate 8 to reach the air conditioning unit 4.
A plate-shaped counter electrode 11 and a needle-shaped ionization electrode 12 for ionizing and charging the dust contained therein are provided. A blower 3 including an electric motor 13 and blower vanes 14 in the main body case 9.
I am wearing. The airflow A sent from the blowing blades 14 is blown out from the blowout port 6. Airflow A behind the outlet 6
A plate-shaped counter electrode 15 and a needle-shaped ionization electrode 16 for ionizing the are disposed.

The air purifier 5 changes the rotation speed of the electric motor 13 to change the amount of air blown by the blower blades 14 and the amount of dust collected by the air conditioning unit 4 per hour. In this structure, the electric motor 13 is changed in three stages of high speed, medium speed, and low speed.
Control is switched to weak operation.

A control unit 17 of the air cleaner 5 is formed on the other side of the upper surface of the main body case 9, and the control unit 17 is formed of a box body in which electrical components are housed and is separable from the main body case 9. The main body case 9 and the control unit 17 may be electrically and mechanically connected by a lead wire, or may be wireless and the control signal from the control unit 17 may be sent using a conveyance means such as infrared rays. .

An air pollution sensor 1 made of a metal oxide semiconductor and a human body sensor 2 for detecting the presence of a person in a non-contact manner are mounted in the upper surface of the main body case 9. The human body sensor 2 can be housed in the main body case 9 if necessary, or can be projected from the main body case 9 and can be oriented in an appropriate direction in the projected state.

The human body sensor 2 uses what is called a pyroelectric infrared sensor, and utilizes the pyroelectric effect of a LiTaO ₂ single crystal. Since the pyroelectric infrared sensor operates with infrared rays of all wavelengths such as a light bulb and the sun, the human body sensor 2 is a pyroelectric sensor in order to detect far infrared rays from the surface of the human body and clothing that have a peak at a wavelength of 9 to 10 μm. A filter is attached to the light incident part of the infrared sensor. Since the human body sensor 2 is not for measuring a partial temperature but for detecting the presence of a person within a certain range, a light receiving area and a non-light receiving area are formed on the pyroelectric infrared sensor, The movement of the object causes the pyroelectric effect on the pyroelectric infrared sensor to detect the presence of a person. Therefore, a lens body is attached to the light entering portion of the pyroelectric infrared sensor to form a light receiving area and a non-light receiving area.
The lens body is formed of a Fresnel lens made of polyethylene that transmits a human infrared wavelength of 7 to 14 μm. In this structure, the range that can be detected by the human body sensor 2 is set to 80 degrees in the lateral direction and 20 to 25 degrees in the elevation direction, and the detection distance is approximately 5 m.

The air purifier 5 can be used in various forms such as floor-standing, shelf-standing, wall-mounted, and ceiling-mounted. Used in reverse.

The electric circuit of the air cleaner 5 is as shown in FIG. 2, and the electric circuit processes the output from the air pollution sensor 1 and is a gas detector 21.
And a human body detection unit 22 that processes the output from the human body sensor 2.
And an automatic operation control unit 23 that outputs detection signals from the gas detection unit 21 and the human body detection unit 22 and outputs a control signal for performing automatic operation described later, and an automatic operation control unit 23 that controls the operation of the air cleaner 5.
An operation selection control unit 24 for processing including a control signal from
A motor control unit 25 that controls the electric motor 13 by a command signal from the operation selection control unit 24, and a DC that applies a high voltage between the counter electrodes 11 and 15 and the ionization electrodes 12 and 16 in cooperation with the motor control unit 25. The high-voltage unit 26, the operation unit 27 that gives an operation instruction to the operation selection control unit 24, the security switch 28, and the air cleaner 5
It has a driving display unit 29 showing the driving detection operation state, a gas detection display unit 30, a human body detection display unit 31, and an alarm unit 32.
The operation unit 27 is formed by a switch and a variable resistance, and includes a stop switch, an operation changeover switch for sequentially switching automatic operation / weak operation / standard operation / rapid operation, a timer selection switch for selecting a time for timer operation, and an air switch. Dirt sensor 1
And a sensitivity adjusting resistor for adjusting the sensitivity of the. The security switch 28 has a function of notifying the detection by the human body sensor 2 in parallel with the operation as the air cleaner 5, and when the security switch 28 is turned on, when the human body sensor 2 detects a person. A buzzer composing the notification unit 32 sounds. The operation display unit 29 is formed by a light emitting body such as an LED, and displays each of automatic, weak, standard, and rapid operations, a timer operation time, and whether the security switch 28 is turned on or off. The gas detection display section 30 is formed of a light emitting body that changes color between red and green, and lights up in red if the air is dirty by the air dirt sensor 1 and lights up in green if the air is clean. The human body detection display unit 31 is formed by a light-emitting body such as an LED that lights up when the human body sensor 2 detects it. The notification unit 32 is formed by a sounding body such as a piezoelectric buzzer, and emits a confirmation sound when the operation unit 27 is operated and a warning sound when the security switch 28 is turned on.

Next, the operation of the air purifier 5 will be described with reference to FIG.

First, when the operation changeover switch of the operation unit 27 is operated, "manual or automatic" is discriminated, and when manual, so-called weak operation, standard operation, or rapid operation is selected, the selected operating state It is operated continuously. When the automatic operation, that is, the operation based on the so-called air pollution sensor 1 and the human body sensor 2, is selected, the weak operation is started. This weak operation is a tentative operation until normal detection can be performed by the air pollution sensor 1.

The temporary operation will be described with reference to FIG.
It is determined whether the sensor resistance Rs of exceeds the target value, and if it exceeds the target value, the timer of T ₁ minute is activated after that and T ₁
After a lapse of minutes, it is determined that the detection by the air pollution sensor 1 is normally performed. However, if the air pollution sensor 1 does not reach the target value or if it reaches the target value after a considerable time has elapsed, the transition to the steady operation is not performed smoothly. This phenomenon occurs when the automatic operation is started in a room where the air is dirty from the beginning and variations in the characteristics of the air pollution sensor 1. Therefore, in parallel with the operation described above, after the automatic operation is selected, the so-called elapsed time t ₁ after the power is turned on is activated, and the air pollution sensor 1 normally detects the end of the state that is achieved earlier. It is judged that it has become possible to do. In this structure, T ₁ minute is set to 2 minutes and t ₁ minute is set to 5 minutes.

Further, the operation during the above-described provisional operation will be described together with the change in the sensor resistance Rs of the air pollution sensor 1. 5 and 6 show changes in the sensor resistance Rs in the initial stage of operation. Fifth
In FIG. 6 and FIG. 6, the air pollution sensor 1 has a sensor resistance value of about ΔR even when the sensor resistance changes as shown by the solid line, the dotted line, and the one-dot chain line at the same time due to the change in the manufacturing conditions. Makes a difference. The air pollution sensor 1 has a large sensor resistance at first, then rapidly decreases, then increases again and then stabilizes. , Q, R, W. P,
When passing Q, R, W, T ₁ minute (2 minutes) timer is activated,
It is judged that it has stabilized after a lapse of time, and sensor resistance Rsp, R _SQ , R _SW
Is input as detection by the air pollution sensor 1. However, one-dot chain line in FIG. 5 will be the expiration of t ₁ min (5 minutes) for a period shorter after passing a point R T ₁ min (2 min), t ₁ min (5
After the lapse of (minutes), it is judged to be stable, and the sensor resistance R _SR is input as detection. Since the dotted line in Fig. 6 does not reach the target value, it is judged that it has become stable after t ₁ minute (5 minutes) and the sensor resistance R
Input _SX as detection.

Note that 5 minutes set as t ₁ minute was set because it is the time for the air pollution sensor 1 to stabilize normally.
It is not necessary to set t ₁ minute to 5 minutes, and it may be 4 minutes or 6 minutes. The same applies to the case where T ₁ minute is 2 minutes, which may be 1 minute or 3 minutes. However, the provisional operation after the operation of the air purifier 5 is set to be short so that the maximum length is optimally 5 minutes. Even if the air pollution sensor 1 has some performance variations, t ₁
There will be no temporary operation for more than a minute.

When the provisional operation is completed, first, the reference value and the sensor resistance Rs are compared and judged. In the comparison judgment first performed after the provisional operation, the reference value for it is stored in advance as the temporary reference value shown in FIG. 5 and FIG. 6, and the comparison judgment with the temporary reference value is performed. The tentative reference value is a value that does not become less than the sensor resistance when the air pollution sensor 1 is stabilized in an atmosphere where the air is cleaned, even if there is a difference in the characteristics of the air pollution sensor 1. Therefore, in FIG. 5, the sensor resistances Rsp, R _SQ , and R _SR after the provisional operation are stored as reference values, and the process shifts to that of FIG.

In FIG. 6, since the sensor resistances R _SW and R _SX after the provisional operation are smaller than the provisional reference value, it is determined that the room air is dirty, and the routine shifts to the steady air cleaning operation. As shown in FIGS. 5 and 6, in the air pollution sensor 1, the reducing gas such as CO contained in the air increases (increases in proportion to smoking, and in this state, increases in proportion to smoke). Then, a sensor whose characteristic is small is used.

When the automatic operation is selected in a state where the indoor air is clean, the presence or absence of a person detected by the human body sensor 2 shown in FIG. 1 and the magnitude of the sensor resistance Rs of the air pollution sensor 1 with respect to the reference value are detected. When the human body sensor 2 detects the presence of a person, the human body timer that counts T minutes is started, and it is determined whether the security switch 28 is turned on or off. When the security switch 28 is turned on, the notification unit 32 is sounded to notify the presence of a person in the room. The notification by the notification unit 32 at this time is different from the confirmation sound when the operation unit 27 is operated. If there is a detection by the human body sensor 2, the air purifier 5 is weakly operated, and the weak operation is performed until the time of T minutes (20 minutes) by the human body timer is completed, and after T minutes have elapsed, the operation is stopped Return to.

Even during the time counting by the human body timer, the detection of the magnitude of the sensor resistance Rs by the air pollution sensor 1 with respect to the reference value and the re-detection of the person by the human body timer are performed. If the sensor resistance Rs becomes smaller than the reference value in the initial period of and during the time measurement by the human body timer, the operation shifts to the steady air cleaning operation.

If the human body sensor 2 detects a person while the human body timer is measuring the time, the human body timer is reset and the time measurement is started. Therefore, if the person is constantly moving indoors with the sensor resistance Rs larger than the reference value, the person's movement stops, and weak driving is continued unless the person leaves the room. Human body sensor 2
The weak driving is set by the movement of people in the room that causes dust and the like to float in the air, and the weak driving is optimal for collecting it because of the dust collecting ability and the driving sound. ing. In addition, it is expected that smoking will be performed if there is a person, and the air in the room will be flowing if the vehicle is operated weakly in advance. It is possible to detect, and it is possible to smoothly shift to a later-described steady operation by the sensor due to air pollution.

Although it is not clear in the flow chart of FIG. 1 that the human body timer measures the human body timer 2 and the time when the human body timer resets the maximum detection, the operation control of the air purifier 5 causes air pollution. Even if the sensor 1 moves to the steady operation, the human body sensor 2 always measures the human body timer by the detection of the person by the human body sensor 2. The operation is stopped after the timing of T minutes is completed. When it returns to, the T minutes will be the only weak driving for the remaining T minutes.

The steady operation by the air pollution sensor 1 will be described. The transition to the normal operation by the detection of the air pollution sensor 1 is performed with the sensor resistance Rs smaller than the reference value.
The operation of the air purifier 5 includes rapid operation, standard operation and weak operation, and the transition to each operation is performed at the ratio of the sensor resistance Rs to the reference value. In this structure, weak operation is performed when 0.6 <Rs / reference value <0.7, standard operation is performed when 0.5 <Rs / reference value <0.6, and rapid operation is performed when Rs / reference value <0.5. This 0.
5, 0.6, 0.7 are set values, and if Rs / reference value> 0.7, it is not necessary to clean the air, and it is waiting for the air to become dirty.

When the detection by the air pollution sensor 1 becomes smaller than the set value 0.7, which is sufficient to shift to the operation, each operation selected immediately in this structure does not shift, and the standard operation is performed for 10 minutes. This standard operation for 10 minutes is an operation called a stirring operation. That is, when partially contaminated air is temporarily detected by the air fouling sensor 1, it is not necessary to shift to the steady operation, and after that, the room air is stirred before the comparison with the set value again. It is something to do. After stirring operation
If the Rs / reference value is greater than 0.7, proceed to, and if the Rs / reference value is less than 0.7, proceed to the operation corresponding to the Rs / reference value for the set value. After switching to each operation, each operation can be switched appropriately and air conditioning can be performed based on the comparison of the ratio Rs / Rss between the sensor resistance Rss detected a certain time (3 minutes) before and the latest sensor resistance Rs and the set value. The indoor air is cleaned by the unit 4. When Rs / Rss becomes larger than the set value, it is judged that the predetermined air pollution is eliminated and the air cleaning is completed, the OFF timer is started, and T ₂ minutes (20 minutes to 4 minutes
(It is set appropriately to 0 minutes), and when it is judged again that the air is contaminated during the time of T ₂ minutes, the OFF timer is reset and the air cleaning is started again in each operation described above. OF
F timer T ₂ minutes of counting transitions in with the sensor resistance Rs of the OFF timer time at the end of the reference value upon completion.

The change in the sensor resistance during the above-mentioned steady operation is as shown in FIG. Referring to FIG. 7, when the air pollution sensor 1 detects a stirring operation for 10 minutes as a standard, the sensor resistance increases and the operation is stopped. After that, the sensor resistance became smaller again, and the stirring operation was performed for 10 minutes. Then, when it was detected again, it corresponded to the weak operation with respect to the set value, so it became weak operation and switched to standard operation due to the progress of air pollution. When operating in standard operation, the difference between Rs and Rss becomes smaller and the OFF timer starts timing, but the air is contaminated again and the degree of contamination corresponds to rapid operation, so rapid operation is performed, and the difference between Rs and Rss Becomes smaller and the OFF timer starts counting and stops. Even if the air purifier 5 is operated, the sensor resistance Rs does not increase until the beginning as shown in FIG. 7 because the air conditioning unit 4 collects smoke but does not collect reducing gas such as CO. by. Therefore, the sensor resistance Rs when the operation by the air pollution sensor 1 is finished is updated to the reference value. The reference value is updated even when the sensor resistance Rs becomes large, and the sensor resistance Rs becomes large due to the natural attenuation of the reducing gas and the ventilation due to the opening and closing of the window door, and the concentration of the reducing gas in the room is always maintained. The standard value is set to.

The air pollution sensor 1 and the human body sensor 2 as described above.
In the automatic driving based on, the start of driving is based on the detection output of the human body sensor 2 by detecting the movement of the person and the air pollution sensor 1.
The operation is stopped based on at least one of the detection outputs from the detection of the predetermined air pollution, and the operation stop is performed by each sensor by the movement of the person and the predetermined air pollution (the predetermined air here. The stain of No. 2 is performed based on the fact that both of the stains (which do not always match the predetermined stain at the start of operation) are no longer detected.

(G) Effect of the Invention The present invention detects the movement of a person with a human body sensor, starts driving, and collects dust and the like that rises along with the movement of the person.
Further, when the air becomes dirty due to smoking or the like, the air dirt sensor detects the dirt and automatically starts the operation with the strength corresponding to the degree of the dirt. In particular, before detecting smoking, it is common for the movement of a person to be detected by the human body sensor, and the blower has already started operation, causing airflow in the room. Can be detected by the air pollution sensor as soon as it is put on the flow of air, and can be operated quickly with the blowing strength corresponding to the dirt on the air. That is, the responsiveness to the early stage of smoking becomes excellent. Also, when a person leaves the room or the air is purified, the human body sensor and the air pollution sensor stop operating the blower for the first time until the movement of the person and the dirt on the air are no longer detected. It can respond appropriately to the source.

[Brief description of drawings]

FIG. 1 shows the present invention. FIG. 1 is a flow chart diagram.
FIG. 2 is a block circuit diagram, FIG. 3 is a perspective view, FIG. 4 is a cross-sectional view, and FIGS. 5, 6 and 7 are characteristic diagrams showing sensor resistance and changes with time in different situations. 1 ... Air dirt sensor, 2 ... Human body sensor, 3 ... Blower, 4 ... Air conditioner.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-159046 (JP, A) Actually developed Shou 61-86627 (JP, U) JP-B 61-24613 (JP, B2)

Claims (1)

[Claims] 1. A human body sensor for detecting a human movement in a non-contact manner, an air dirt sensor for detecting dirt due to smoke or reducing gas in indoor air, and a detection for detecting a human movement of the human body sensor. When the operation is started by the detection output of at least one of the output and the detection output by the detection of the predetermined air pollution of the air pollution sensor, the respective sensors no longer detect the movement of the person and the predetermined air pollution. The blower that is shut down based on the blower and the blower shall have its blowing strength adjusted according to the detection output of the air dirt sensor, and the airflow generated by the blower should capture smoke, dust, etc. passing through. An air conditioner comprising a collecting filter.