JPH09862A - Display device of odor removing rate for air cleaner - Google Patents

Abstract

PURPOSE: To measure accurately the deodorizing effect in an air cleaner by providing a display device with a sensor for sensing odor set in an air sampling chamber, and a computer, a motor and the like for computing and displaying the deodorizing rate and an active carbon cap set removably on an inlet of the air sampling chamber. CONSTITUTION: An odor sensing device is stored in a casing 1 of portable, flat and rectangular shape, and a sensor 4 for sensing odor as a semiconductor sensor of metallic oxide is set deep in an air sampling chamber 3 formed on one end face 2 of the casing 1. An active carbon cap 7 with an active carbon filled layer formed inside and a porous instrumental wall 6 on its outer surface is fitted removably on an inlet 5 of the air sampling chamber 3. An operation panel section 11 is attached on the upper face of the casing 1, on which a mode switch 12, a display 13, a memory switch 14 and the like are attached, and the deodorizing rate is computed from the inlet constitution and the outlet constitution of an air cleaner and displayed on the display 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an odor removal rate display device for an air purifier, and more specifically, it measures the deodorizing effect of an air purifier and provides a direct and reliable numerical value. The present invention relates to a display device for an odor removal rate that can be displayed.

[0002]

2. Description of the Related Art Conventionally, a deodorant, an adsorbent, an air purifier, etc. are generally used for deodorization in a house. However, deodorization by an air purifier is caused by ozone. Chemical deodorization, electrostatic deposition of odorous components, adsorption by activated carbon, etc. are combined to enable excellent deodorization at a relatively low cost.

Regarding the effect of deodorization in a house, the standard of deodorization depends on the human sense of smell. For example, after the installation of an air purifier, a specific odorous component is sensory compared to before the installation. I had to rely on the measure of decrease. However, the human sense of smell makes it difficult to get used to or quantify the smell, and thus difficult to evaluate.

Recently, an odor sensor has appeared, which comprises a method of measuring the amount of adsorption on a lipid bilayer membrane as a change in the natural frequency of a piezoelectric element, a method of measuring the resistance change due to adsorption on a semiconductor surface, and the like. However, odorous components are also being measured by this odor sensor.

[0005]

[Problems to be Solved by the Invention] Odor sensors have specific sensitivity characteristics depending on the odor spectrum, and therefore it is not always necessary to reproducibly evaluate the level of the detected odor. It was not easy, and it was extremely difficult to accurately and reproducibly evaluate the condition and the ratio of the degree of deodorization.

Therefore, the object of the present invention is to measure the effect of deodorization in an air purifier and to show it directly by using a reading value which is reproducible and reliable and which is proportional to the odor intensity.
Moreover, it is an object of the present invention to provide a device which can be easily handled and whose deodorization rate can be measured without requiring special skill.

According to the invention, an air sampling chamber,
An odor detection sensor provided in the sampling chamber,
A removable activated carbon cap at the inlet of the air sampling chamber, a mode switch that switches normal measurement, inlet concentration measurement of the air purifier, outlet concentration measurement of the air purifier, and removal rate display in this order, and the activated carbon cap to the air sampling chamber. The reference value setting switch that sets the reference value (zero value) based on the sampling value in the normal measurement mode while it is fitted in the inlet of the odor component from the sampling value of the inlet concentration measurement mode and the outlet concentration measurement. And a display for displaying the odor removal rate, a calculator for calculating the odor removal rate from the inlet concentration and the outlet concentration, a memory for storing the respective concentrations and removal rates, and calling the memory. An odor removal rate display device for an air purifier is provided, which is provided with a memory switch.

In the apparatus of the present invention, it is preferable to detachably provide an external cover having a slit-shaped opening for covering the inlet of the air sampling chamber when the activated carbon cap is not attached to the inlet.

Further, it is preferable to provide a light emitting element for displaying each mode of normal measurement, inlet concentration measurement, outlet concentration measurement, and odor removal rate display corresponding to the switching of the mode switch.

[0010]

The device of the present invention comprises an air sampling chamber, an odor detecting sensor provided in the sampling chamber, a memory for calculating and displaying the odor removal rate, a calculator and a memory. The first feature is that a removable activated carbon cap is provided at the inlet of the air sampling chamber.

Due to this feature, in the odor detecting device of the present invention, an activated carbon cap is attached to the inlet of the air sampling chamber to adsorb odorous components in the air,
It is possible to purify the air supplied to the sampling chamber, thereby creating a reference value, based on which a deodorizing rate can be obtained and displayed.

Further, with the activated carbon cap removed, the odor inlet concentration of the air purifier and the odor outlet concentration of the air purifier can be measured, and the odor detection sensor obtained by the inlet and outlet concentration measurement What subtracted the reference value from the output value of, the voltage corresponding to the odor concentration,
That is, it is a density value.

In the present invention, in order to perform the measurement in a procedural and simple manner, a mode in which normal measurement, measurement of the inlet concentration of the air cleaner, measurement of the outlet concentration of the air cleaner, and display of the odor removal rate are switched in this order The second feature is that a switch is provided and a reference value setting switch and a memory switch are combined.

First, the reference value (zero point voltage) can be set by performing sampling in the normal measurement mode with the activated carbon cap fitted in the inlet of the air sampling chamber and pressing the reference value setting switch. . In addition, with the activated carbon cap removed, the mode setting enables sequential sampling of inlet concentration measurement and outlet concentration measurement, and the odor inlet concentration and outlet concentration are calculated by a calculator based on the reference value. By displaying the calculated concentration on the display and pressing the storage switch, the calculated concentration value can be stored in the memory.

In the present invention, by providing a light emitting element for displaying each mode of the normal measurement, the inlet concentration measurement of the air cleaner and the outlet concentration measurement of the air cleaner, it is possible to determine which mode the odor detecting device is in. It can be easily confirmed and a series of operations can be performed without error.

Further, the mode switch is provided with a mode for displaying the odor removal rate in addition to the normal measurement, the inlet concentration measurement of the air purifier and the outlet concentration measurement of the air purifier. The odor removal rate can be calculated and calculated from the inlet concentration and the outlet concentration stored in, and the removal rate can be displayed.

In the apparatus of the present invention, it is preferable to detachably provide an external cover having a slit-shaped opening for covering the inlet of the air sampling chamber without the activated carbon cap being attached to the inlet of the air sampling chamber. Eliminating the influence of the sensor wind direction, it becomes possible to detect the odor concentration with good reproducibility.

As described above, according to the present invention, the deodorizing effect of the air purifier can be measured and directly displayed. A standard value can be created, and the deodorization rate can be calculated and displayed based on this. The deodorization rate close to that of human sense can be obtained by using the indicated value proportional to the odor intensity. Moreover, there is an advantage that the handling operation is easy and the deodorization rate can be measured without requiring special skill.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 (whole perspective view) and FIG. 2 (perspective view of an air sampling chamber inlet and an activated carbon cap) showing an example of the odor detecting device of the present invention, the odor detecting device is a portable and flat type. It is housed in a rectangular parallelepiped casing 1, and an air sampling chamber 3 and an odor detection sensor 4 located in the back of the sampling chamber 3 are provided on the front surface 2 on the short side thereof.

The odor detecting sensor 4 is a metal oxide semiconductor sensor which is known per se, and is adapted to detect an odor while being heated by a heater and output a voltage value corresponding to the odor. There is.

At the inlet 5 of the air sampling chamber 3, an activated carbon cap 7 having a packed bed of activated carbon (not shown) inside and a porous vessel wall 6 on the outer surface can be attached and detached. When the activated carbon cap 7 is mounted, the outside air flows into the air sampling chamber 3 through the porous device wall 6 and the activated carbon layer.

On the upper and lower surfaces of the casing 1, the front surface 2
An outer cover 10 having a slit-shaped opening 9 for covering the activated carbon cap 7 with a notch 8 having a triangular shape that widens toward the end and the activated carbon cap 7 is removed (see FIG. 3).
Is designed to be detachably attached.

On the upper surface of the casing 1, the operation panel section 1
1 is provided, and the operation panel unit 11 is provided with a mode switch 12, a display unit 13, a memory switch 14, and the like.

The mode switch 12 switches between the normal measurement mode, the inlet concentration measurement mode, the outlet concentration measurement mode and the odor removal rate display mode. In this embodiment, the mode switch 12 is composed of a push switch. By pressing, the mode is switched to the above mode.

The display 13 is 4 in this embodiment.
It is composed of a 7-segment LED (light emitting diode) device or a liquid crystal device, and can display a sampling value or density.

The memory switch 14 stores the odor concentration value in a memory or the like in the inlet concentration measurement mode and the outlet concentration measurement mode. By pressing this switch in each of the above modes, the concentration value is stored in the memory. It is like this.

In the specific example shown in the drawing, an LED device for displaying each mode, that is, a NOM / LED 15 indicating a normal measurement mode, an IN / LED 16 indicating that it is in an inlet concentration measurement mode, and an outlet concentration measurement mode are displayed. An OUT LED 17 indicating that there is an LED 17 is provided, which makes it possible to easily know which mode is currently set.

On the side surface of the casing 1, a reference value for setting the reference value based on the sampling value in the normal measurement mode with the main SW 18 for powering on the apparatus and the activated carbon cap 7 fitted in the inlet of the air sampling chamber. A setting switch 19 is provided, and in this specific example, a variable resistor (volume) 20 for changing the magnification of the density display value.
Also, a variable resistor 21 for adjusting the sensor output voltage value in the normal measurement mode is provided.

On the back surface of the casing 1, a socket 22 for connecting to a DC power source (for example, 6 volts) is provided.

Inside the casing 1, in addition to the odor detecting sensor 4 described above, a microcomputer, especially a one-chip type 8-bit microcomputer (not shown) is housed. The odor detecting sensor 4 is an analog / digital type. Via the converter,
It is connected to the first parallel input / output interface (PIOA). In addition, the display unit 13 receives the second parallel input / output interface (PIO) via the driver.
B). Furthermore, normal measurement display NOM ・ L
The ED 15, the inlet concentration measurement display IN / LED 16 and the outlet concentration measurement display OUT / LED 17 are connected to the third parallel input / output interface (PIOC) by the mode SW 12,
The memory SW 14 and the standard value setting SW 19 are respectively connected to the fourth parallel input / output interface (PIOD).

The operation control by the microcomputer is shown in FIGS.
It is performed according to the flowchart shown in.

First, referring to FIG. 4, the main switch 1
When 8 is turned on, the microcomputer is initialized according to the program written in the ROM.

Initial stabilization time (Fig. 4 * 1) Heat cleaning is performed for HCT seconds, VH after power is turned on.
Set HC to "H". The following operations are performed for OKT seconds after the power is turned on. 1) The normal LED (15) is made to blink. (1 second cycle (0.5 second ON 0.5 second OFF)) Lights after OKT seconds have elapsed. 2) The 7-segment (13) display blinks with "0000" displayed. (1 second cycle (0.5 second ON, 0.5 second OFF)) 3) Zero, Mode and memory keys are not accepted. The contents of "HCT" and "OKT" can be changed with EPROM data. Standard data is HCT = 6
0 (sec), OKT = 180 (sec)

Stand-by state (Fig. 4 * 2) After the power is turned on, OKT seconds later, the normal LED (15) is turned on. The 7-segment (13) display is turned on with "0000" displayed. The Zero key (19), the Mode key (12) and the memory key (14) are accepted, and the process proceeds to each state. Zero key (19) Zero set value confirmation Mode key (12) Measurement state Memory key (14) Memory recall

Confirmation of Zero set value (Fig. 4 * 3) Pressing the Zero key (19) in the standby state causes a shift. All LEDs (regular LED, IN LED, OUT
(LED) blinks (1 second cycle). The 7-segment (13) display displays the Zero value (V _{0 of} SRAM). The display is "XXXX" (0 to 510
It is 4 digits of 0). Press the Zero key (19) again to return to the standby state. The Zero value is the sensor voltage (Va
g: 0 to 5100 (mv)) is held as SRAM data.

Measurement state Normal state (FIG. 4 * 4) Press the Mode key (12) in the standby state to shift. Normally, the LED (15) is turned on. The display density value is displayed every 1 sec. When the Mode key (12) is pressed, the mode shifts to the inlet odor measurement mode. When the Zero key (19) is pressed, it shifts to the Zero measurement state. The display density value is the sensor output voltage value,
The value is relatively expressed with an o value of 100. That is,
Assuming that the sensor voltage at Zero setting is Vag and the sensor voltage at odor measurement is Vsm, the display density value is Is calculated.

Zero measurement state (FIG. 4 * 5, FIG. 5) By pressing the Zero key (19) in the normal state, the atmosphere of the place is set to a zero value and the value of Vag is displayed for 2 seconds, and V _{0 is} displayed in the SRAM. Enter as. Therefore, the subsequent calculation is performed with the changed V ₀ . Press the Zero key (19) again to return to the standby state.

Inlet concentration measurement state (FIG. 4 * 6, FIG. 6) By pressing the Mode key (12) from the normal state, only the IN LED (16) is turned on to indicate that the inlet concentration measurement is started. (Normal LED (15) is OFF).

Reading of the entrance memory (Fig. 4 * 7) The display density value is displayed every 1 sec (see density calculation). By pressing the memory key (14), the displayed concentration value at that time is displayed for 2 seconds and stored as the inlet concentration value. The memory has RAM data. When the Mode key (14) is pressed, the state moves to the outlet odor measurement state. If the inlet concentration is lower than the zero concentration, error processing is performed.

Outlet concentration measurement state (Fig. 4 * 8, Fig. 7) By pressing the Mode key (14) from the inlet concentration measurement state, the OUTLED (17) is turned on to indicate that the outlet concentration measurement state has been entered. To do.

Reading the exit memory (Fig. 4 * 9) The displayed density value is displayed every 1 sec (see density calculation). By pressing the memory key (19), the displayed concentration value at that time is displayed for 2 seconds and stored as the outlet concentration value. The memory has RAM data. Press the Mode key (14) to move to the removal rate display.

Removal rate display (Fig. 4 * 10) By pressing the Mode key (14) from the outlet concentration measurement state, IN LED (16) and OUT LED
(17) is lit to indicate that the removal rate display has been entered. The removal rate is calculated and displayed by the following formula (1) from the stored inlet concentration and outlet concentration. * Both n = 1 and 2 are available. * Zero density indicates the density at which X = 1 when Zero is set and the RAM data Y ₀ (ppm). (Ie X
The density at which = 1 and Y ₀ must take the same value. ) Standard data is Y ₀ = 100 (ppm) * Display is "XX.XX" (%) * If there is no data in the memory, blink "0010". * If the removal rate exceeds 100%, it is set to 99.99. * If the removal rate is negative, error processing is performed. Press the Mode key (14) to switch to the standby state.

Memory read state Entrance memory read (Fig. 4 * 11) Pressing the memory key (14) in the standby state causes a transition. Turn on the IN LED (16). The stored inlet concentration is displayed on 7-segment (13). “0” if there is no memory data for inlet concentration value
It blinks 010 ". When the memory key (14) is pressed, the process goes to the exit memory reading.

Exit memory read (Fig. 4 * 12) Memory key (14) when reading the entrance memory
Press to move. Turn on the OUT LED (17). The exit concentration stored in memory is displayed on 7-segment (13). If there is no memory data for the outlet concentration value, "0"
The display flashes 010 ". When the memory key (14) is pressed, the removal rate memory reading starts.

Removal rate memory read (Fig. 4 * 13) Memory key (14) at exit memory read
Press to move. IN and OUT LEDs (16)
(17) is turned on. The removal rate stored in memory is set to 7 X (13) "X
X. It is displayed as XX. When there is no data in the memory, it blinks “0010.” When the memory key (14) is pressed, it shifts to the standby state.

The reference set value (sensor output voltage value when the activated carbon cap is attached) is appropriately in the range of about 300 to 600 mV, and this adjustment is performed by the variable resistor 21. The variable resistance 20 is used to scale the density display value. Since the life of the activated carbon cap is about several years, it is better to replace it when the standard set value exceeds the above range.

[0047]

According to the present invention, the degree of deodorization in an air purifier can be directly indicated by a numerical value with reproducibility and reliability,
Moreover, the handling operation is easy, and there is an advantage that the deodorization rate can be measured without requiring special skill.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an example of an odor detection device of the present invention.

FIG. 2 is a perspective view of an air sampling chamber inlet and an activated carbon cap.

FIG. 3 is a perspective view of an outer cover.

FIG. 4 is a flowchart showing various operations in the apparatus of the present invention.

5 is a flowchart showing the contents of A in the normal measurement (zero point setting) mode in FIG.

6 is a flowchart showing the contents of B in the inlet concentration measurement mode in FIG.

FIG. 7 is a flowchart showing the contents of C in the outlet concentration measurement mode in FIG.

[Explanation of symbols]

 1 Casing 2 Front Surface 3 Air Sampling 4 Odor Detection Sensor 5 Air Sampling Chamber Entrance 6 Porous Vessel Wall 7 Activated Carbon Cap 8 Notch 9 Slit-like Opening 10 External Cover 11 Operation Panel 12 Mode Switch 13 Indicator 14 Memory Switch 15 NOM / LED 16 showing normal measurement mode IN / LED 17 showing inlet concentration measurement mode OUT / LED 18 showing outlet concentration measurement mode Main SW 19 for power-on 19 Reference value setting switch 20 Range adjustment variable resistor 21 Variable resistor for adjusting sensor output voltage 22 Power socket.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hajime Kato 1-33 Toyotsu-cho, Suita City, Osaka Prefecture Duskin Co., Ltd.

Claims (4)

[Claims] 1. An air sampling chamber, an odor detection sensor provided in the sampling chamber, a removable activated carbon cap at the inlet of the air sampling chamber, and a normal measurement,
A mode switch that switches between measuring the inlet concentration of the air purifier, measuring the outlet concentration of the air purifier, and the removal rate display in this order, and with the activated carbon cap fitted to the inlet of the air sampling chamber, and to the sampling value in the normal measurement mode. A reference value setting switch for setting a reference value (zero value) based on the indicator, an indicator for displaying the concentration of the odor component from the sampling value of the inlet concentration measurement mode and the outlet concentration measurement, and an odor removal rate, and an inlet. An air purifier characterized by comprising a computing unit for calculating the odor removal rate from the concentration and the outlet concentration, a memory for storing the concentration and the removal rate, and a memory switch for calling the memory. Display device for odor removal rate for machines. 2. The odor removal rate display device according to claim 1, further comprising an external cover which is detachably provided with a slit-shaped opening for covering the inlet of the air sampling chamber without the activated carbon cap attached. 3. The display device for the odor removal rate according to claim 1, further comprising a light emitting element for displaying each mode of normal measurement, inlet concentration measurement of the air cleaner and outlet concentration measurement of the air cleaner. 4. The odor removal rate display device according to claim 3, wherein in the odor removal rate display mode, the light emitting elements for inlet concentration measurement and outlet concentration measurement are turned on.