JPH01104323A - Air cleaner - Google Patents

Abstract

PURPOSE:To clean air in a room etc. effectively by arranging a tobacco detecting sensor which reacts with the smoke of tobacco and a human body sensor which reacts with house dust. CONSTITUTION:In automatic operation modes of air clarification by using an ultrasonic sensor for detecting a human body and a sensor for detecting tobacco smoke, e.g., a gas sensor 56, an operation of an air cleaner is put into low state by an output signal from the ultrasonic sensor and is selected to be in high, medium or low state in accordance with a level of an output signal from the gas sensor 56 which indicates a gas concentration. The operation by the output signal from the gas sensor 56 for detecting tobacco smoke is given prior ity over that from the ultrasonic sensor. By adopting such sensor specifications and operation modes it is possible to start operation before house dust generates by detecting a human body 50, to carry out an automatic operation by detecting gas of tobacco and to stop a motor 31 by a timer circuit 33 at a certain time after a person is out of a room.

Description

[Detailed Description of the Invention] [Technical Field 1] The present invention relates to an air purifier that removes house dust and cigarette smoke from indoor air, as well as cigarette odor and other bad odors generated indoors. .

[Background technology] There is a lot of pollen, dead dust mites, and feces in the home, as well as dust and dust generated from lifting and lowering futons and walking on carpets, which can cause allergies in the human body and be the cause of asthma, etc. It becomes.

On the other hand, many home air purifiers target tobacco use, have a built-in tobacco sensor, and determine the operating mode based on the sensor's output. This cigarette sensor uses a gas sensor that reacts to the gas emitted from cigarettes and a flame sensor that detects the flame of a lighter, and these sensors do not react to dust. Also,
There are many devices that move by sensing the human body, such as toilet products and stairway lighting, and some are also used in air purifiers, but most use infrared rays to detect the presence of a human body. Sensors that only work when moving dust is kicked up are not used in air purifiers.

1 Objective of the Invention 1 The present invention has been provided in view of the above points, and is equipped with a human body detection sensor as a sensor for house dust, and quickly detects house dust caused by the human body such as walking or raising and lowering a futon. The purpose of the present invention is to provide an air purifier that quickly purifies the air and, by combining it with a cigarette detection sensor, can automatically operate by detecting both house dust and cigarettes.

[Disclosure of the Invention J (Structure) The present invention provides an air purifier that purifies inhaled or exhaled air, which includes a human body detection sensor using a movement detection type ultrasonic sensor and a cigarette detection sensor that detects smoking. By having an operation mode that operates based on the output of each of the above sensors, the tobacco detection sensor detects cigarette smoke and cleans the air, and when the human body moves, the human body detection sensor detects cigarette smoke and cleans the air. The device is characterized in that it detects this using a sensor and inhales the dust raised by the movement of the human body to purify the air.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Figure Ii shows a perspective view of the air purifier, partially showing the inside. Figure 2 shows a perspective view of the air purifier from the front, Figure 3 shows a sectional view at the center, Figure 4 shows an exploded perspective view of the filter block FB, and Figure @5 shows the filter block FB. A perspective view of the grille 1 assembled into the grille 1 is shown. The air purifier of the present invention is broadly divided into a grille 1 that sucks air and cleans it with a filter block FB.
, a bell mouth 2 for sucking and guiding purified air from the grill 1, and a housing 3 for discharging the air sucked from the bell mouth 2 by a motor, fan, etc.

Starting from the grill 1 placed on the front of the air purifier, the grill 1 has the following configuration. As shown in FIG. 2, a lattice portion 1a having a horizontal striped lattice is formed on the front surface of the grill 1, and at the same time, a vent hole for sucking air is formed. fjI on the back of grill 1
As shown in Figure J4, a filter block FB composed of a pre-filter 4, a dust removal filter 5, a deodorization filter 6.7, etc. is housed. Filter block F
As shown in FIG. 4, a horizontal striped grid is formed only on the back side of the grill 1 in the entire circumference plate 8 where B is arranged, and ventilation holes are provided. A notch g9 is formed at the center of both sides of the circumferential rib 8 of the grille 1 and is open at the rear as a filter block FB takeout portion.

On both upper and lower sides of the circumferential wrap 8 that constitutes the frame of the filter storage portion 10 of the grill 1, there are groove-shaped attachment portions 12 for attaching the filter holder 11, and L-shaped attachment portions 13 facing the scoop. are formed respectively. As shown in FIG. 6, the filter holder 11 has an I-shaped upper part bent.
A protrusion 11b is integrally formed on the lower surface of this bent piece 11a. In addition, there is a hole li at the bottom of the filter holder 11.
A hole 11c is bored, and projecting pieces lid are provided on both sides of the hole 11c. Filter holder 11 bent piece tin
into the groove of the mounting part 12 of the pulley 8 all around the bending piece 11.
Even if the protrusion 11b of a is inserted into the through hole 14 drilled in the mounting part 12 and the filter presser 11 is pulled, it cannot be removed from the grille 1. Also, insert the lower part of the filter holder 11 into the mounting g13, and then insert the protruding piece 11d.
is adapted to be caught on the inner surface of the mounting portion 13.

Next, the bell mouth 2 will be explained. Figure 3, 71
1 and 8, a switch operation WS 16 is formed on the inclined surface 15 of the bell mouth 2, and this switch operation section 16 has a so-called tact switch configuration, and can be used to turn on/off the air volume or switch the sensor automatic operation mode by just touching it lightly. settings and timer switching. Switch operation part 1
The printed board stand 17 constituting the housing 3 is fixed to the boss part of the housing 3 with screws at 21 points.
, the printed board 18 has 7 molded springs and 1 round boss.
It is fixed at 9. As shown in FIG. P2S5, the printed circuit board 18 is equipped with a sensor sensing section 20, a sensor slit 74 shown in FIG. 2, a tactile switch 21, a light emitting diode 22, and other electronic components. The printed board stand 17 is held down by a part of the bell mouth 2,
The switch operation part 16 is composed of a molded spring 23 integrally molded from the bell mouth 2, and the molded spring 23 presses the tact switch 21 on the print #i18 from above to turn it on and off. A switch name plate 24 is attached to the upper surface of the molded spring 23 of the bell mouth 2 using a sheet of polyester film.

As shown in FIG. tIS7, two engagement recesses 26 into which the engagement pieces 25 of the grille 1 are inserted are formed on the lower surface of the bell mouth 2. As shown in FIG. 7, a suction 1] 27 is formed in the hollow part of the bell mouth 2 facing the 7T of the housing 3, which will be described later. It is formed integrally with the The deodorizing filter 7 is in contact with the radial lattice 28, which is integrally formed with a plurality of circular lattices 29 whose height is lower than that of the lattice 28. does not come into contact with the circular grid 29, leaving a gap.

Next, the housing 3 to which the bell mouth 2 is attached will be explained. In FIG. 3, FIG. 7 to FIG. 9, first,
A discharge port 30 is provided in the upper part of the housing 3, and the design gap between the bell mouth 2 and the housing 3 is determined by the discharge port 30.
It is provided in line with the line of the first grid 30a of tjtJ. Inside the housing 3, the motor 31 is mounted on the motor bracket 3 using a vibration isolating rubber 32 and a sleeve 33.
It is fixed to the motor fixing plate 34 at 1[:@ of the housing 3 with screws 35 in such a manner that the back plate 3a of the housing 3 is sandwiched between the fixing portions at the locations. A fan 36 located within the housing 3 is screwed and fixed to the rotor 31a of the motor 31 with screws 37 via upper and lower fan reinforcing plates. Incidentally, the motor 31 and the 7T ton 36 constitute a blower. In addition, from the housing 3, the wind tunnel casing 3
The peripheral wall 39 of the molded product constituting the J! 1t39 and wind tunnel casing 73
8. The above-mentioned discharge port 30 is formed in a part of this wind tunnel casing 38.

By the way, when switching between "strong [and 1 weak"] when operating the air purifier, a partial voltage resistor is connected in series to the motor 31 in the case of "weak" operation. Since the voltage dividing resistor generates heat, the voltage dividing resistor is fixed to a fixed plate that also serves as a heat sink. A voltage dividing resistor block 41 consisting of this voltage dividing resistor and the like is shown in FIGS. 10 to 113. That is, a voltage dividing resistor 44 is fixed to a fixed plate 42 which also serves as a heat dissipator, and
Cut-and-raised pieces 43 are formed on both sides of the fixing plate 42 to prevent the fixing plate 42 from being pulled out. This voltage dividing resistance block 41 is connected to the motor 31 attached to the housing 3.
A part of the peripheral wall 39 of the wind tunnel casing 38 closest to the lead wire 45 is cut out and disposed there. Note that the temperature fuse 46 is also fixed together with the voltage dividing resistor 44. Furthermore, in order to facilitate wiring of the lead wire 45 of the motor 31, a groove 48 is provided with ribs 47 on both sides, as shown in FIG.

Next, the sensor will be explained. First, as a first example, a case will be described in which the human body detection sensor is a movement detection type ultrasonic sensor and the cigarette detection sensor is a gas sensor that detects gas. FIG. 14 shows a block diagram of an ultrasonic sensor for human body detection. The ultrasonic vibrator 49 is excited by the oscillation circuit 52 driven by the power from the constant voltage power source 55, and the ultrasonic wave generated by the ultrasonic vibrator 49 is transmitted when a movement such as a person moves within the detection area. If there is an object 50, due to the Doppler effect,
When the moving object 50 is approaching, it is reflected back at a frequency higher than the oscillation frequency, and when it is moving away, it is reflected back at a frequency lower than the oscillation frequency. The ultrasonic transducer 49 receives this anti-Jt ultrasonic wave, and the internal detection circuit 51
It compares the oscillation frequency of the oscillation circuit 52 with phase detection, and if there is a phase shift, a signal with the shifted frequency is output. This signal turns on the timer circuit 53 and outputs an on signal (5V) by passing through the load switching circuit 54. The motor 31 starts rotating in accordance with this ON signal.

Therefore, with this configuration, the air purifier operates before a person enters or moves and throws up dust on the floor, carpet, etc., quickly purifying the air, and eliminating the movement of people. After a certain period of time, the timer circuit 53 automatically stops the motors 31 and 7-an 36.

Next, the basic configuration and basic operation when the gas sensor 56 is used as a tobacco detection sensor are shown in FIGS. 15 to 17. In the figure, a gas sensor 56 detects reducing gases (T12, C01HC,
etc.), a change in resistance occurs, and as shown in Figure 16, the amount of change changes depending on the gas concentration, so the output voltage also changes, making it possible to select the operating air volume according to the gas concentration. . FIG. 15 shows the basic configuration, in which the output voltage of the gas sensor 56 is received by an arithmetic control unit 70 consisting of a microcomputer, and the output voltage is set to "weak,""standard (medium) 1," or "rapid (strong)" depending on the gas concentration. 33 types of signals are output, and these signals control the motor switching circuit 71 to control the rotation of the motor 31. Therefore, as shown in FIG. , can be operated in the [Strong] driving mode. Furthermore, when you start the -degree unmatsu, the γ gas concentration, that is, the gas sensor 56
The device may be operated until the resistance value, that is, the output voltage returns to its original value, or it may be designed to be automatically operated on a timer from the time of the peak of the gas concentration so that the device can be used in accordance with the actual situation. However, in this case, if a cigarette is smoked again during driving and the concentration increases, it is necessary to control the timer operation so that the timer operation starts from the peak point when the concentration increases again.

By configuring an air purifier using both the ultrasonic sensor for human body detection and the sensor 56 for tobacco detection, in automatic operation mode, the air purifier In response to the output signal from the gas sensor 56, depending on the output signal level (gas concentration), if the concentration is high, it will be in strong operation, if it is a little high, it will be in medium operation, and if it is low, it will be in weak operation. The device can be controlled to quickly remove cigarette smoke and odor. In addition, operation based on the output signal of the sensor is
Priority is given to operation using the cigarette detection gas sensor 56. With these sensor specifications and operation modes, it will detect a human body and start operating before house dust is generated, and it will also detect cigarette gas and start automatic operation, so the room will always be kept at a certain level of cleanliness. can be kept.

FIG. 18 shows the operation of the air purifier when both the ultrasonic human body detection and the cigarette detection using the gas sensor 56 are used.

In FIG. 18, time 1. When a person enters the room, the ultrasonic sensor that detects movement turns on and the operation mode is set to low mode. If you smoke at time t2, you will start driving for a while, and depending on the concentration of cigarette smoke, you will start driving at time t3.
Press to go into strong driving mode. Then, from time t to time 4, the timer performs strong operation for a certain period of time.

At time t4, the timer lowers the mode to medium operation, and similarly at time t, the timer causes the timer to lower the mode to medium operation, and at time t5, the mode changes to low mode. From time 1s onward, the machine is operated at low speed by a timer, but when a person leaves the room at time t6, the ultrasonic sensor is turned on and after detecting movement, the system is operated at low speed for a certain period of time, and at time t7, the operation is stopped.

Next, the operation when the cigarette detection sensor is an ultraviolet sensor will be explained. The ultraviolet sensor 57 detects and outputs ultraviolet rays from a lighter's flame, and its principle will be explained below. As shown in Fig. 19, the structure of the ultraviolet sensor 57 consists of an anode 58 and a charging surface (cathode) 60 that is sensitive only to ultraviolet rays inside a special glass 58 that allows ultraviolet rays to pass through, and a special glass is sealed inside. has been done. A voltage is applied between the anode 59 and the cathode 60. When ultraviolet light enters the cathode 60 through the special glass 58, photoelectrons are emitted. The photoelectrons are attracted to the anode 59 by the electric field, especially if the applied voltage is high (and the electric field is made strong).
The photoelectrons are sufficiently accelerated and collide with large molecules in the tube, electrifying them. This repetition eventually causes a discharge phenomenon, which is extracted as a large signal current. If this continues, the discharge will continue, so a quenching circuit is required for normal use.

FIG. 20 shows the basic drive circuit of the ultraviolet sensor 57 and its operating waveforms. In the figure, a charging/discharging circuit made up of a resistor 61 and a capacitor 62 is a quenching circuit, and T'=0.5CR is called a quenching time.
. Therefore, the output waveform in this circuit is a pulse waveform. When the ultraviolet sensor 57 detects the flame of the lighter, the air purifier starts strong operation, and after a certain period of strong operation under timer control, automatically shifts to weak operation.

By using a combination of sensors like this, when someone enters the room, the room is cleaned with low power, and when a lighter is lit to smoke, the power goes on before cigarette smoke comes out, quickly removing dust and deodorizing functions. . In addition, there is also a rechargeable sensor that detects when dust above a certain concentration enters the light beam as a cigarette detection sensor.In this case, concentration can also be detected, so the operation mode can be set according to the concentration, just like a gas sensor. be able to.

Next, a case will be described in which night operation is stopped in an air purifier having two sensors like this. FIG. 21 is a circuit diagram of the same. While the CdS cell 63, which is the illuminance sensor, is not exposed to light, the values of the resistors R1 and R2 are set to R, << R2, so the transistor 64 is off, and the relay is turned off. Contact 65 is not turned on. C
When light hits the dS cell 63, the CdS cell 63 becomes conductive, so the transistor 64 becomes on. Therefore, the contacts of the relay 65 are turned on, so that the sensor control circuit 66 can control the motor 31.

With this configuration, the motor 31 does not operate automatically at night when it is dark due to the automatic operation by the sensor, which does not disturb a good night's sleep.

Next, we will explain the case where both an ultrasonic sensor and a heat ray sensor are installed for human body detection. As mentioned above, the ultrasonic sensor is a sensor that detects only when a person moves, and it is an effective sensor for removing dust raised when a person moves, but it does not detect when a person is in the room. If you want people to always drive, if the person is stationary, the driving time will end and expire. In such cases, it is desirable to use a heat ray detection sensor that detects the presence of a human body. In this case, the outputs of both sensors are ORed, and if either sensor outputs an output signal, the air purifier starts weak operation. The heat ray detection sensor is as shown in Figure 22.
An optical system 81 consisting of a lens that collects infrared rays in a wide area onto an infrared detector 82, an infrared detector 82, a bandpass amplifier 83 that passes only infrared rays of a certain frequency emitted from the human body, and No. 46 from the amplifier 83. A signal processing circuit 84 that outputs a detection output, a relay circuit 85 that receives a signal from the signal processing circuit 84 and operates a load, and an amplifier 83 for these circuits.
, a constant voltage power supply unit 86 that supplies power to a signal processing circuit 84 and a relay circuit 85.

The infrared detector 82 consists of a pyroelectric element 87, and when the pyroelectric element 87, which has dipoles oriented in one direction by polarization, is irradiated with a hot ray, the arrangement of the dipoles is disturbed and the surface load changes. This phenomenon is called the pyroelectric effect. This pyroelectric effect is shown in Figure #23.

All objects radiate light from their surfaces, and the likely peak propagation changes depending on the object's temperature.

For the same object, the lower its temperature, the less radiated infrared energy it emits, and the wavelength of its radiation is also greater. Also, the higher the temperature, the higher the infrared energy radiated (and the shorter the wavelength.) An object surface with a human body temperature, that is, around 36°C, radiates infrared rays with a peak wavelength of 10 μm.

Furthermore, when this infrared ray (wavelength 1 to 100 μff+) is absorbed by a substance, it excites the vibrations of molecules and atoms and raises the temperature of the substance, so it is called a heat ray. A heat ray detection sensor detects a human body by detecting a change in the output of the pyroelectric element 87, that is, a change in the amount of reflected infrared rays.

In this way, if you install both ultrasonic and heat ray sensors,
Operation begins when a person moves, continues operation depending on the presence of the person, and stops after a certain period of time when the person is no longer present. In addition, when movement is detected using ultrasonic waves, the vehicle can be operated at a medium level, and when the presence of a person is detected using an infrared sensor, the vehicle can be operated at a low level. Further, it may be possible to change the sensor to be activated depending on the purpose.

When a movement of a human body or a cigarette is detected, the system will operate according to the Q&A mode for a certain period of time, but the time can be set depending on the size of the room and the air purifier's air volume and dust removal and deodorization capabilities. By providing a switch that can change the air, the air can be purified more conveniently. Below is an example.

The operating time is changed by a slide switch 75 as shown in FIG. If you do this, regardless of the size of the room, you will be able to keep the dust and odor below a certain level after the air purifier automatically operates.

[Effects of the Invention] As described above, the present invention provides an air purifier that purifies inhaled or exhaled air, which includes a human body detection sensor using a movement detection type ultrasonic sensor, and a cigarette detection sensor that detects smoking. It has an operation mode that operates based on the output of each of the above sensors, so the cigarette smoke is detected by the cigarette detection sensor and the air is purified, and the air is purified when the human body moves. In some cases, the human body is detected by a human body detection sensor, and the air can be purified by inhaling the dust kicked up by the human body, so the air can be purified at the same time as the human body kicks up dust The device can be made to be compatible with house dust, starting to operate automatically, and
If the human body remains stationary for a long time, the operation is stopped and the system detects only when the human body moves, so there is no need for unnecessary operation and the air purifier can be used efficiently. After that, in order to prevent the lump from flying up again, it operates at a low level so that it can be removed softly, and when it detects cigarettes, it operates at a high level according to the concentration.In this way, two different detection sensors are used. This has the effect of constantly removing dust and gas concentrations so that they are always below a certain level.

[Brief explanation of the drawing]

ftSi diagram is a perspective view of an air purifier showing a part of the inside of an embodiment of the present invention, i2 diagram is a perspective view of the same air purifier, FIG. 3 is a sectional view of the same as the above, and FIG. 4 is the same filter An exploded perspective view of the block, FIG. 5 is a perspective view of the same filter block as above, stored, FIG. 6 is a perspective view of the same filter holder as above, FIG. 7 is a perspective view of same as above, and FIG. 'g8g Enlarged cross-sectional view, Figure 9 is a front view of the housing same as above, Figure 10 is a perspective view of the voltage dividing resistor block same as above,
Figure 1 is an exploded perspective view of the same as the above, Figure 12 is a front view of the same as the above, Figure 13 is a perspective view of the main parts of the same as the above, Figure 14 is a block diagram of the ultrasonic sensor of the same as the above, and Figure 15 is the same as the person in the above. A block diagram when performing detection, tpJ16 is a characteristic diagram showing the relationship between the gamma gas concentration and the sensor output, and Figure 1517 is a diagram showing the operation mode in the same gas sensor. Fig. 18 is a diagram showing the operation mode when the ultrasonic sensor and the ultrasonic sensor are used together, Fig. 19 is a cross-sectional view of the ultraviolet sensor as above, Fig. 20 is a drive circuit diagram of the same as above, and Fig. 21 is a circuit diagram when using the same illumination sensor as above,
FIG. 22 is a block diagram when the above heat ray sensor is used, FIG. 23 is an explanatory diagram of the same operation, and FIG. 24 is a perspective view of the same air cleaner. 56 is a gas sensor, and 57 is an ultraviolet sensor. Agent Patent attorney Ishi 1) Chief ) Figure 19 Figure 20 Figure 21 Figure 22 Figure 23

Claims (8)

[Claims] (1) An air purifier that purifies inhaled or exhaled air, which is equipped with a human body detection sensor using a movement detection type ultrasonic sensor and a tobacco detection sensor that detects smoking, and is operated by the output of each of the above sensors. An air purifier characterized by having an operation mode. (2) The air purifier according to claim 1, wherein the operation mode includes strong and weak operation, and the operation mode by the human body detection sensor is the weak operation by timer control. (3) The tobacco detection sensor is an ultraviolet sensor,
2. The air purifier according to claim 1, wherein the operation mode is a timer-controlled operation starting from strong operation. (4) The air according to claim 1, wherein the tobacco detection sensor is a gas sensor, and its operation mode is controlled to be strong or weak depending on the concentration of gas generated from the tobacco. Purifier. (5) The air purifier according to claim 1, wherein the tobacco detection mode is given priority over the human body detection mode. (6) The air purifier according to claim 1, characterized in that it is equipped with an illuminance sensor, and human body detection and tobacco detection do not operate in a dark place. (7) The air purifier according to claim 5, characterized in that it is equipped with both an ultrasonic sensor for detecting a human body and a heat ray sensor. (8) The air purifier according to claim 3, further comprising a switching means capable of switching between a strong operation and a weak operation.