JP2610413B2 - air purifier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air purifier that removes house dust and tobacco smoke from indoor air, and also removes tobacco smell and other malodors generated indoors. is there.

[Background Art] There are many pollen or mite corpses and feces in the home, and dust and dust generated by raising and lowering futons and walking on carpets, which are allergic to the human body.
It is the cause of asthma. In contrast, most home air purifiers have a target placed on tobacco, which has a built-in tobacco sensor and determines the operation mode according to the sensor output. This tobacco sensor uses a gas sensor that responds to gas emitted from tobacco and a flame sensor that detects the flame of a lighter. These sensors do not respond to dust. In addition, many products that detect the human body and move, as seen in toilet products and stage lighting, are also used in some air purifiers. Yes, sensors that only work when soaring up dust when moving are not used in air purifiers.

[Object of the invention] The present invention has been provided in view of the above points,
Equipped with a sensor for human body detection as a sensor for house dust, it detects house dust such as walking caused by the human body and raising and lowering the futon as soon as possible, purifies the air promptly, and combines it with a sensor for cigarette detection. It is an object of the present invention to provide an air purifier capable of automatic operation by detecting both tobacco and tobacco.

[Disclosure of the Invention] (Constitution) The present invention relates to an air purifier for purifying inhaled or discharged air, and a movement detection type ultrasonic wave for detecting that a human body is stationary or non-existent and that the human body is operating. The sensor is equipped with a sensor for human body detection by a sensor and a tobacco detection sensor for detecting smoking, and the driving mode operated by the output of the tobacco detection sensor includes strong and weak driving, and operates by the output of the human body detection sensor. The operation mode is weak driving and timer control, so tobacco smoke is detected by a tobacco detection sensor to purify the air, and when a human body moves, a human body detection sensor is used. To detect dust and softly remove the dust that has soared due to the movement of the human body while preventing the soaring of dust again by weak driving. It can, moreover is capable of removing dust stirred up by movement of the to continue a certain time operation even lost movement detection of human human by the operation of the timer control.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the air purifier partially showing the inside.
FIG. 2 is a perspective view of the air purifier viewed from the front, and FIG.
The figure shows a sectional view at the center, FIG. 4 shows an exploded perspective view of the filter block FB, and FIG. 5 shows the filter block.
FIG. 2 shows a perspective view of a state where the FB is incorporated in the grill 1.
The air purifier according to the present invention is roughly divided into a grill 1 for sucking air and purifying the air with a filter block FB, and a grill 1.
A bell mouth 2 for inhaling and guiding the purified air from
The housing 3 is configured to discharge air sucked from the bell mouth 2 by a motor, a fan, or the like.

Starting from the grill 1 disposed on the front of the air purifier, the grill 1 has the following configuration. As shown in FIG. 2, a grill portion 1a having a horizontal stripe grid is formed on the front surface of the grill 1, and a ventilation hole for sucking air is formed at the same time. As shown in FIG. 4, on the back side of the grill 1, a pre-filter 4, a dust filter 5,
Filter block F composed of deodorizing filters 6, 7, etc.
B is stored. As shown in FIG. 4, a horizontal stripe-shaped lattice is formed only on the back surface of the grill 1 in the rib 8 around which the filter block FB is arranged, and a ventilation hole is provided.
At the substantially center of both sides of the entire circumferential rib 8 of the grill 1, there is formed a cut-out portion 9 having a rear opening as a filter block FB take-out portion.

On both upper and lower sides of the entire circumferential rib 8 constituting the frame of the filter storage portion 10 of the grill 1, a groove-shaped mounting portion 12 for mounting a filter retainer 11, and an L-shaped mounting portion facing each other.
13 are formed respectively. As shown in FIG. 6, the filter holder 11 is bent at the upper part into an L-shape.
A protrusion 11b is integrally formed on the lower surface of 11a. In addition, a hole 11c is drilled in the lower part of the filter holder 11, and this hole 1c is formed.
Projecting pieces 11d are provided on both sides of 1c. Insert the bent piece 11a of the filter holding member 11 into the groove of the mounting portion 12 of the entire circumferential rib 8, and insert the projection 11b of the bent piece 11a into the through hole 14 formed in the mounting portion 12 to remove the filter. Even if the holding tool 11 is pulled, it is difficult to get out of the grill 1. Also, insert the lower part of the filter holder 11 into the mounting
Are hooked on the inner surface of the mounting portion 13.

Next, the bellmouth 2 will be described. FIG. 3, FIG.
In FIG. 8 and FIG. 8, a switch operation section 16 is formed on the inclined surface 15 of the bell mouth 2.
Numeral 16 is a so-called tact switch configuration that enables the air volume to be turned on / off, setting the sensor automatic operation mode, and switching the timer with a simple touch. The printed board base 17 constituting the switch operation unit 16 is fixed to the boss of the housing 3 with three screws, and the printed board base 17 has a printed board.
18 is fixed with a spring hook of a molded product and a round boss 19. As shown in FIG. 1, the sensor board 20, the sensor slit 74, the tact switch 21, the light emitting diode 22, and other electronic components are mounted on the printed board 18, as shown in FIG. The printed board stand 17 is held down by a part of the bell mouth 2, and the switch operation section 16 is constituted by a molded spring 23 integrally formed from the bell mouth 2.
At 23, the tact switch 21 on the printed board 18 is pressed from above to be turned on and off. A switch nameplate 24 is attached to the upper surface of the molded product spring 23 of the bell mouth 2 by a sheet of polyester film.

As shown in FIG. 7, two engagement recesses 26 into which the engagement pieces 25 of the grill 1 are inserted are formed on the lower surface of the bell mouth 2. A suction port facing a fan of the housing 3 described later.
As shown in FIG. 7, a bell 27 is formed substantially at the center of the bell mouth 2, and a lattice 28 is formed radially integrally with the bell mouth 2 on the front side of the suction port 27. Also, this grid 28
A plurality of circular grids 29 whose height is lower than that of the grid 28 are integrally formed. Deodorizing filter 7 on radial grid 28
The deodorizing filter 7 does not come into contact with the circular grid 29, so that a clearance is generated.

Next, the housing 3 to which the bell mouth 2 is attached will be described. 3 and FIGS. 7 to 9, first, a discharge port 30 is provided at an upper portion of the housing 3, and a design clearance between the bell mouth 2 and the housing 3 is determined by the discharge port 30.
Of the first grating 30a.
Inside the housing 3, the motor 31 uses a vibration-proof rubber 32 and a sleeve 33 to sandwich the back plate 3 a of the housing 3 with three fixing portions of the motor bracket, thereby forming a motor fixing plate 34 on the back side of the housing 3. Are fixed by screws 35. The fan 36 located in the housing 3 is screwed vertically to the rotor 31a of the motor 31 via a fan reinforcing plate.
It is screwed and fixed by 7. The motor 31 and the fan 36
And the blower is configured. Further, from the housing 3, a peripheral wall 39 of a molded product constituting the wind tunnel casing 38 is formed so as to have an Archimedes spiral shape.
And the printed board 17 and the peripheral wall 39 with the wind tunnel casing 38
Is composed. The discharge port 30 is formed in a part of the wind tunnel casing 38.

By the way, when switching between "strong" and "weak" in the operation of the air purifier, a voltage dividing resistor is connected in series with the motor 31 in the "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 radiating plate. FIGS. 10 to 13 show a voltage dividing resistor block 41 composed of the voltage dividing resistors and the like. That is, the voltage dividing resistor 44 is fixed to the fixed plate 42 which also serves as a heat radiating plate, and the cut-and-raised pieces 43 are cut and raised on both sides of the fixed plate 42 to prevent the fixed plate 42 from coming off. The voltage dividing resistor block 41 is provided by cutting out a part of the peripheral wall 39 of the wind tunnel casing 38 which is closest to the lead-out portion of the lead wire 45 of the motor 31 to which the housing 3 is attached. The temperature fuse 46 is fixed together with the voltage dividing resistor 44. Also, the motor
In order to facilitate wiring of the lead wires 45 of the 31, a groove 48 having ribs 47 on both sides is provided as shown in FIG.

Next, the sensor will be described. First, as a first embodiment, a case will be described in which the human body detection sensor is a movement detection type ultrasonic sensor and the tobacco detection sensor is a gas sensor that detects gas. FIG. 14 is a block diagram of an ultrasonic sensor for detecting a human body. Constant voltage power supply
The ultrasonic oscillator 49 is excited by the oscillation circuit 52 driven by the power supply from 55, and the ultrasonic waves generated by the ultrasonic oscillator 49 cause a moving object 50 such as a person to move in the detection area. For example, due to the Doppler effect, the moving object 50 is reflected and returned at a frequency higher than the oscillation frequency when approaching, and at a frequency lower than the oscillation frequency when moving away. The reflected ultrasonic wave is received by the ultrasonic transducer 49, and the internal detection circuit 51 compares the oscillation frequency of the oscillation circuit 52 with the phase detection, and if there is a phase shift, outputs a signal of the shifted frequency. . This signal allows the timer circuit
53 operates and outputs an ON signal (5 V) by passing through the load switching circuit 54. According to this ON signal, the motor
31 starts rotating. Therefore, by adopting such a configuration, if a person enters or moves, and the air purifier operates before raising dust such as a floor or a carpet, the air is quickly purified, and the movement of the person is eliminated. After a certain period of time, the motor 31 and the fan 36 are automatically stopped by the timer rotation 53.

Next, the basic configuration and basic operation when the gas sensor 56 is used as a tobacco detection sensor will be described with reference to FIGS.
Shown in the figure. In the figure, when a gas sensor 56 encounters a reducing gas (H ₂ , CO, HC, etc.) contained in tobacco smoke, a change in resistance occurs, and as shown in FIG. Since the amount of change also changes, the voltage also changes as an output, and it becomes possible to select the operating air flow according to the gas concentration. No.
FIG. 15 shows a basic configuration, in which the output voltage of the gas sensor 56 is received from the arithmetic and control unit 70 from a microcomputer, and is set to three levels of "weak", "standard (medium)", and "rapid (strong)" according to the gas concentration. The type of signals are output, and the motor switching circuit 71 is controlled by these signals to control the rotation of the motor 31. Therefore, as shown in FIG. 17, the operation can be performed in the "weak", "medium", or "strong" operation modes according to the gas concentration. Once the operation is started, the gas concentration, that is, until the resistance value of the gas sensor 56, that is, the output voltage returns to the original value, is operated or used in accordance with the actual condition. It is also possible to have a specification to automatically operate the timer. However, in this case, if the tobacco is sucked again during the operation and the concentration increases, it is necessary to control the timer operation from the peak point when the concentration increases again.

By configuring the air purifier using both the above-described ultrasonic sensor for human body detection and the gas sensor 56 for tobacco detection, in the automatic operation mode, the output signal from the ultrasonic sensor is used for the air purifier. , And operates according to the output signal level (gas concentration) from the gas sensor 56, depending on the output signal level (gas concentration), when the concentration is high, the operation is strong, when it is slightly high, the operation is medium, and when the concentration is low, the operation is weak. Then, the operation can be controlled so as to quickly remove the smoke and odor of the tobacco. In addition, the operation by the output signal of the sensor is performed with priority given to the operation by the tobacco detection gas sensor 56. With such sensor specifications and operation mode, the human body is detected and operation is started before house dust is generated, and tobacco gas is detected and automatic operation is started. Can be kept. FIG. 18 shows the operation of the air purifier when both the ultrasonic human body detection and the tobacco detection by the gas sensor 56 are used.

In FIG. 18, an ultrasonic sensor, which is a movement detection sensor and people to enter at time t ₁ is turned on, and a weak driving operation mode. When the smoke at the time t _2, enters the middle operation for a while, go up to the operation mode to the strong operation at time t ₃ in accordance with the concentration of tobacco gas. Then, the predetermined time strong operation by the timer from the time t ₃ to time t _4. Down to the middle operation by the timer at time t _4, likewise are medium-operated by a timer to time t _5, the weak operation mode at time t _5.
While the after time t ₅ is weak operated by a timer, when a person is leaving at time t ₆ ultrasonic sensor after the movement detection is turned on, the predetermined time weak operation, operation is stopped at time t _7.

Next, the operation when the tobacco detection sensor is an ultraviolet sensor will be described. The ultraviolet sensor 57 detects and outputs ultraviolet light from the lighter flame, and its principle will be described. As shown in FIG. 19, the structure of the ultraviolet ray sensor 57 includes an anode 59 and a photocathode (cathode) 60 having sensitivity only to ultraviolet rays in a special glass 58 that transmits ultraviolet rays.
Special gas is sealed inside. This anode 59 and cathode
Voltage is applied between 60. Cathode through special glass 58
When ultraviolet rays enter 60, photoelectrons are emitted. The photoelectrons are attracted to the anode 59 by the electric field, and when the applied voltage is increased to increase the electric field, the photoelectrons are sufficiently accelerated to collide with gas molecules in the tube and ionize them. This repetition eventually causes a discharge phenomenon and is extracted as a large signal current. In this state, the discharge continues, so that a quenching circuit is formed in the case of normal use.

FIG. 20 shows a basic drive circuit of the ultraviolet sensor 57 and its operation waveform. In the figure, a charge / discharge circuit by a resistor 61 and a capacitor 62 is a quenching circuit,
≒ 0.5CR is called quenching time. Therefore, the output waveform in the case of this circuit is a pulse waveform. When the flame of the lighter is detected by the ultraviolet ray sensor 57, the air cleaner starts strong operation, and after the strong operation for a certain period of time by the timer control, automatically shifts to the weak operation. By using such a combination of secers, if a person enters the room, it will be cleaned by weak driving, and if a lighter is installed to smoke tobacco, it will be strong operation before cigarette smoke comes out, and the dust removal and deodorizing function will work quickly . In addition, as a sensor for tobacco detection, there is a photoelectric sensor that detects when dust of a certain concentration or more blocks in the light beam. In this case, the concentration can be detected. Can be.

Next, a case where the night operation is stopped in the air purifier having such two sensors will be described.
FIG. 21 is a circuit diagram showing a CdS cell 63 which is an illuminance sensor.
While the light is not hit, because the value of the resistor R ₁ and R ₂ are as R ₁ «R _2, transistor 64 is off, the contacts of the relay 65 is not turned on. When light strikes the CdS cell 63, the CdS cell 63 is turned on, so that the transistor 64
Is turned on. Accordingly, the contact of the relay 65 is turned on, so that the motor 31 can be controlled by the sensor control circuit 66. With this configuration, the motor 31 does not operate due to automatic operation by the sensor at night or when it is dark, and does not hinder sleep.

Next, a case where both an ultrasonic sensor and a heat ray sensor are provided for human body detection will be described. As described above, the ultrasonic sensor is a sensor that senses only when a person moves, and is an effective sensor to remove dust that has rolled up when a person moves, but it is always a sensor when a person is in a room When the driver wants to drive, the driving time ends when the person is stationary. In such a case, it is desirable to use together with a heat ray detection sensor for detecting the presence of a human body.
In this case, the output of both sensors is ORed, and if either sensor outputs an output signal, the air purifier starts weak operation. As shown in FIG. 22, the heat ray detection sensor has an optical system 81 composed of a lens that collects infrared rays in a wide area to the infrared ray detector 82, an infrared ray detector 82, and a band that passes only infrared rays of a certain frequency emitted from the human body. Passage amplifier 83
And a signal processing circuit that outputs detection output with the signal from the amplifier 83
It comprises a relay circuit 85 for receiving a signal from the signal processing circuit 84 to operate a load, and a constant voltage power supply 86 for supplying power to the amplifier 83, the signal processing circuit 84 and the relay circuit 85.

The infrared detector 82 is composed of a pyroelectric element 87. When the pyroelectric element 87 having a dipole oriented in one direction by a polarization operation is irradiated with heat rays, the arrangement of the dipole is disturbed and the surface load changes. This phenomenon is called a pyroelectric effect. The state of this pyroelectric effect is shown in FIG. Every object emits light from its surface, the peak wavelength of which changes depending on the temperature of the object. For the same object, the lower its temperature, the less radiant infrared energy and its longer wavelength. The higher the temperature, the higher the radiated infrared energy and the shorter the wavelength. An infrared ray having a peak wavelength of about 10 μm is radiated from a human body temperature, that is, an object surface near 36 ° C.
When this infrared ray (wavelength: 1 to 100 μm) is absorbed by a substance, it excites the vibration of molecules and atoms to raise the temperature of the substance, and is called a heat ray. The heat ray detection sensor detects a human body by capturing a change in the output of the pyroelectric element 87, that is, a change in the amount of reflected infrared light.

As described above, if both the ultrasonic and hot-wire sensors are provided, the operation starts due to the movement of a person, and the operation is continued due to the presence of a person. If the person disappears, the operation stops after a certain period of time. In addition, when the movement is detected by the ultrasonic wave, the driving can be performed at a medium level, and when the presence of a person is detected by the infrared sensor, the driving can be performed at a low level. Also,
The sensor that works may be switched according to the purpose.

When human body movement detection or cigarette detection is performed, operation is performed according to each mode for a certain period of time.However, the time can be set according to the size of the room and the air volume of the air purifier and the ability to remove dust and deodorize. By providing a switch that can be switched, air can be more conveniently purified.
The following is an example.

The operation time is switched by a slide switch 75 as shown in FIG. In this manner, dust and odor can be reduced to a certain level after the automatic operation of the air purifier regardless of the size of the room.

[Effects of the Invention] As described above, the present invention relates to an air purifier for purifying air to be inhaled or discharged, which is a movement detection type of super-moving type that detects that a human body is stationary or non-existent and that a human body is operating. A human body detection sensor with a sound wave sensor, and a tobacco detection sensor that detects smoking, the driving mode operated by the output of the tobacco detection sensor consists of strong and weak driving, and the operation mode is based on the output of the human body detection sensor. The operation mode that operates is weak driving and timer control, so tobacco smoke is detected by a tobacco detection sensor to purify the air, and when the human body moves, it is used for human body detection The air can be cleaned by sensing with a sensor and inhaling dust that has risen due to the movement of the human body. For this reason, the air purifier can automatically start operation at the same time as the human body rolls up the dust, making it a house dust compatible type,
In addition, when the human body is stationary for a long time, the operation is stopped, and the detection is performed only when the human body moves, so that there is no need to perform unnecessary operation, and the air purifier can be used efficiently.
After detecting the movement of the human body, the dust that has soared due to the movement of the human body can be softly removed while preventing the soaring of dust again by weak driving, and even if the detection of human movement is lost by the operation of the timer control, it will be operated for a fixed time It is possible to remove dust that soars up when a person moves, and to perform tough driving according to the concentration when tobacco is detected, thus providing two different detection sensors. In addition, there is an effect that dust and gas concentration can always be quickly removed so as to be lower than a certain level.

[Brief description of the drawings]

1 is a perspective view of an air purifier showing a part of an embodiment of the present invention, FIG. 2 is a perspective view of the air purifier, FIG. 3 is a sectional view of the air purifier, and FIG. FIG. 5 is an exploded perspective view of the filter block of FIG. 5, FIG. 5 is a perspective view of a state in which the filter block is housed, FIG. 6 is a perspective view of the filter holder of the above, FIG. FIG. 9 is an enlarged sectional view of a main part of the above, FIG.
FIG. 11 is a perspective view of the same voltage dividing resistor block, FIG. 11 is an exploded perspective view of the same, FIG. 12 is a cross-sectional view of the same, FIG. 13 is a perspective view of a main part of the same, and FIG. FIG. 15 is a block diagram of a sensor for performing gas detection, FIG. 16 is a characteristic diagram showing the relationship between gas concentration and gas sensor output, and FIG. FIG. 18 is a diagram showing a mode, FIG. 18 is a diagram showing an operation mode when the ultrasonic sensor and the gas sensor are used together,
FIG. 19 is a cross-sectional view of the above ultraviolet sensor, FIG. 20 is a drive circuit diagram of the above, FIG. 21 is a circuit diagram of the above using the illuminance sensor, and FIG. 22 is a case of using the above-mentioned heat ray sensor. 23 is an operation explanatory view of the above air conditioner, and FIG. 24 is a perspective view of the same air cleaner. 56 is a gas sensor and 57 is an ultraviolet sensor.

Continuing on the front page (72) Inventor Genki Nakano 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. References JP-A-62-69038 (JP, A) JP-A-57-49094 (JP, A) JP-A-60-188601 (JP, U) JP-A-61-176607 (JP, U)

Claims (3)

(57) [Claims] An air purifier for purifying inhaled or discharged air, a movement detection type human body detection sensor for detecting that a human body is stationary or non-existent and that a human body is operating, and for detecting smoking. The operation mode operated by the output of the tobacco detection sensor includes a strong operation and a weak operation, and the operation mode operated by the output of the human body detection sensor is a weak operation and a timer. An air purifier characterized by being controlled. 2. The method 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 tobacco. air purifier. 3. The air purifier according to claim 1, wherein the tobacco detection operation mode has priority over the human body detection operation mode.