JPH05142173A - Quantity of air detector - Google Patents

Abstract

PURPOSE:To enable even an unskilled person to check pollution by comparing a measurement data of a pollution sensor with reference values stored in a memory means by a reference value comparison means to analyze and display the pollution in a room automatically based on the results. CONSTITUTION:Measurement data of a dust sensor 8 is compared with reference values which are stored in a memory means 30 by reference value comparison means 36-39 and the frequency at which the data exceed the reference values is counted by reference values exclusion counting means 40-43. Then, a reference value setting/judging means 44 judges which reference value is selected based on a setting signal from a reference value setting switch 19. Based on the signal, a reference exclusion rate computing means 45 calls up counts corresponding to set reference values from the means 40-43 to compute a reference exclusion rate based on the values and a value of a measurement frequency counting means 31. When a display control means 48 selects a secular change display with a mode changeover switch 18, a secular change output means 46 is actuated. If an analysis results display is selected, an analysis results output means 74 is operated to perform a display on a display section 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air quality detecting device for measuring and detecting the polluted state of indoor air in order to select an air conditioner and the number of used units according to the size of the room and the purpose of use.

[0002]

2. Description of the Related Art A conventional air quality detecting device used to select an air conditioner and the number of units to be used according to the size of the room and the purpose of use is a dust or carbon dioxide gas sensor that detects the concentration of dust or carbon dioxide in the room. Is detected and the detection result is recorded by a recording device such as a pen recorder installed separately to measure and detect the state of contamination of indoor air.

[0003]

However, in the conventional air quality detecting device, the user must manually analyze the indoor pollution condition based on the recorded data recorded in the recording device. That is, the user compares the recorded data with a reference value according to the purpose of use in the room in advance, and the maximum value, the minimum value, the average value of the dust or carbon dioxide concentration and the dust or carbon dioxide concentration are compared with the reference value. The current situation is to check the ratio of time exceeded (out-of-standard ratio), and to determine the size of the room, the number of air conditioners used, etc. according to the purpose of use, and the air conditioning capacity. Therefore, the analysis work is complicated. In particular, since the out-of-base rate requires a special calculation, only an expert can easily calculate the out-of-base rate.

In view of the above, it is an object of the present invention to provide an air quality detecting device which can automatically analyze a pollution situation in a room and can easily confirm the pollution situation even by an inexperienced user.

[0005]

[Means for Solving the Problems] The problem solving means according to claim 1 of the present invention measures and detects the state of pollution of indoor air in order to select the model of the air conditioner and the number of used air conditioners according to the room. The pollution sensor for detecting the state quantity of the factor affecting the pollution of the indoor air, the control circuit for automatically analyzing the pollution situation of the indoor air based on the output signal from the pollution sensor, and the dust concentration Display unit for displaying the change over time and the analysis result by the control circuit, a mode changeover switch for switching the display of the display unit between the change over time display mode and the analysis result display mode, and a reference value according to the purpose of use in the room. A reference value setting switch for setting the control circuit, the control circuit stores a plurality of reference values according to the purpose of use in the room in advance, a measurement number counting means for counting the number of measurements, Based on the comparison result of the reference value comparison means for comparing the measurement data of the dye sensor and each reference value stored in the storage means, the measurement data exceeds each of the reference values. Out-of-reference-value counting means for counting the number of times, reference-value setting determination means for determining which of the reference values should be set based on the setting signal from the reference-value setting switch, and the reference-value setting determination Based on the determination signal from the means, call the count value according to the set reference value from the reference value outside counting means, the count value,
With the count value of the measurement number counting means, an out-of-reference rate calculation means for calculating the ratio of time when the measurement data exceeds the set reference value, and a change-over-time output means for outputting a change over time of the measurement data to the display unit, When the time-dependent change display mode is selected by the analysis result output means for outputting the out-of-reference ratio to the display unit and the time-dependent change display mode is selected, the time-dependent change output means is activated, and when the analysis result display mode is selected, the Display control means for operating the analysis result output means.

According to a second aspect of the present invention, the problem solving means is the first aspect.
The described pollution sensor is a dust sensor that detects the dust concentration in the air. The problem solving means according to claim 3 is the carbon dioxide gas sensor according to claim 1, wherein the pollution sensor detects the carbon dioxide gas concentration in the air. According to a fourth aspect of the present invention, in the air quality detecting device according to the second aspect, the zero point reference value is set to the predetermined value when the output level of the dust sensor does not become zero continuously for a predetermined time or more in the control circuit. Zero-point correction means for updating to the minimum value within the time is provided.

According to a fifth aspect of the present invention, the problem solving means is the first aspect.
In the air quality detecting device described in (2) and (2), the control circuit is provided with external output means for outputting the change over time of the measurement data and the analysis result thereof to an external device.

[0008]

In the means for solving the problems according to claims 1 and 2 and 3, when the device starts to operate, the counting number counting means of the control circuit counts the number of times of measurement. Then, when the output signal of the contamination sensor is input to the control circuit, the reference value comparison means compares the measurement data of the contamination sensor with each reference value stored in the storage means, and based on the comparison result, the reference value The out-of-value counting means counts the number of times the measured data exceeds each of the reference values. Next, the reference value setting discriminating means discriminates which one of the reference values should be set based on the setting signal from the reference value setting switch, and the reference value is discriminated based on the discriminating signal from the reference value setting discriminating means. The outside ratio calculation means calls the count value according to the set reference value from the outside-reference-value counting means, and the ratio of the time when the measured data exceeds the set reference value according to the count value and the count value of the number-of-measurements counting means. Is calculated. Therefore, the measurement data can be automatically analyzed.

When the time-dependent change display mode is selected by the mode changeover switch, the display control means operates the time-dependent change output means to display the time-dependent change data on the display unit, and the analysis result display mode is selected. In this case, the analysis result output means is operated to display the analysis result data on the display section. Therefore, the temporal change data and the analysis data can be easily confirmed even during the measurement.

In the fourth aspect, the zero point correction means updates the zero point reference value to the minimum value within the predetermined time when the output level of the dust sensor does not become zero continuously for a predetermined time or longer. Therefore, even if dust with relatively large particles adheres to the dust sensor and it becomes impossible to accurately detect the dust, it is possible to continue the measurement by coping with this and stop the operation of the device once and There is no need to remove dust that has adhered.

In claim 5, the external output means outputs the change over time of the measurement data and the analysis result thereof to an external device. Therefore, it is possible to record the change over time of measurement data and the analysis result, and if the selection factors for selecting the air conditioner model and the number of used air conditioners according to the room are input to the external device, the external device can be used. It is possible to automatically select the model of the air conditioner and the number of used units according to the room.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
Based on. The configuration of the air quality detecting device of this embodiment will be described with reference to FIGS. FIG. 7 is a front view of the air quality detecting device, and FIG. 8 is a schematic view showing the internal structure of the air quality detecting device. The air quality detection device of the present embodiment is for measuring and detecting the pollution state of indoor air in order to select the size of the room, the model of the air conditioner and the number of the air conditioners used according to the purpose of use, As shown in FIG. 8, a fan 4 that forms an air flow from the intake port 2 to the exhaust port 3 in the apparatus main body 1
A fan motor 5 for driving the fan 4, a temperature sensor 6 for detecting the indoor temperature, a humidity sensor 7 for detecting the indoor humidity, and a dust sensor 8 for detecting the dust concentration in the room.
And a circuit board 11 on which a control circuit 9 and a power supply circuit 10 (see FIG. 1) for automatically analyzing the polluted state of indoor air based on output signals from the temperature sensor 6, the humidity sensor 7, and the dust sensor 8 are mounted. And a battery 12 are internally provided. In addition, P is a prefilter.

The apparatus main body 1 is formed in a box shape, and the intake port 2 is arranged at the lower front portion of the main body 1 and the exhaust port 3 is arranged at the upper surface thereof. In addition, the device body 1
A display unit (liquid crystal display plate) 13 is provided on the upper part of the front surface of the unit to display the change in dust concentration over time and the analysis result. In addition, between the display unit 13 and the intake port 2, as shown in FIG.
As described above, the main switch 14, the measurement on / off switch 15 for starting and ending the measurement, the measurement time switching switch 16 for switching the measurement time, the sensitivity switching switch 17 for switching the sensitivity of the dust sensor 8, and the display unit 13 are provided. A mode change switch 18 for switching the display between the time change display mode and the analysis result display mode and a reference value setting switch 19 for setting a reference value according to the purpose of use in the room are arranged.

The temperature sensor 6 and the humidity sensor 7 are
As shown in FIG. 8, it is arranged closer to the exhaust port 2 than the fan 4, and is mounted on the back surface of the circuit board so as to come into contact with the air introduced into the apparatus main body 1 by the fan 4. A thermistor or the like is used for the temperature sensor 6, for example. The dust sensor 8 is of a photoelectric type and is arranged closer to the exhaust port 2 than the temperature sensor 6 and the humidity sensor 7 so as to come into contact with the air introduced into the apparatus main body 1 by the fan 4.

Next, the structure of the control circuit 9 will be described with reference to FIG. FIG. 1 is a functional block diagram of a control circuit of the air quality detection device. The control circuit 9 includes a microcomputer, has a CPU, a program ROM, a data RAM, and the like, and performs control according to a program stored in the ROM. The control circuit 9 has a function of analyzing the measurement data, a function of controlling the time-dependent change of the measurement data and a display of the analysis result, a function of correcting the zero point of the dust sensor 8 and a time-dependent change of the measurement data and the analysis result. A function of outputting to an external device 52 such as a computer is provided, and in order to exert this function, it has a control means shown in the functional block diagram of FIG. In the figure, 20 is an AC adapter.

The control circuit 9 has a storage means (EEPROM) 30 for storing first to fourth reference values and maximum and minimum values corresponding to the purpose of use in the room in order to obtain a measurement data analysis function. The measurement number counting means 31 for counting the number of times of measurement, and the measurement data correction means 32 for correcting the dust concentration data from the dust sensor 8 according to the temperature and the humidity based on the detection data from the temperature sensor 6 and the humidity sensor 7.
And comparing the measurement data corrected by the measurement data correction means 32 with the maximum value stored in the storage means 30,
If the measured data is larger than the maximum value, the maximum value updating unit 33 that updates and writes the maximum value in the storage unit 30 to the measured data, the measurement data corrected by the measurement data correction unit 32, and the storage unit 30 store the measured data. If the measured data is smaller than the minimum value, the storage means 3 is compared.
The minimum value updating means 34 for updating and writing the minimum value of 0 to the measurement data and the measurement data corrected by the measurement data correcting means 32 are integrated and divided by the count value of the measurement number counting means 31 to obtain the measurement data. Average value calculation means 35 for calculating the average value of the measurement data, the measurement data corrected by the measurement data correction means 32, and the first reference value (for example, 0.15 mg / m ³ ) stored in the storage means 30. The first reference value comparison means 36 for comparing the measurement data, the measurement data corrected by the measurement data correction means 32, and the second reference value (for example, 0.17 mg / m ³ ) stored in the storage means 30. The second reference value comparison means 37 for comparison, the measurement data corrected by the measurement data correction means 32, and the third reference value (for example, 0.20 mg / m ³ ) stored in the storage means 30 are compared. Third reference value comparison hand 38, the measurement data and the measurement data corrected by the correction means 32, a fourth reference value stored in the storage unit 30 (e.g., 0.30 mg / m ³⁾ fourth reference value comparing means for comparing the 39 Based on the comparison result of the first reference value comparing means 36, the comparison result of the first reference value outside counting means 40 for counting the number of times the measured data exceeds the first reference value and the second reference value comparing means 37 On the basis of the comparison result of the second out-of-reference-value counting means 41 that counts the number of times the measured data exceeds the second reference value, and the number of times the measured data exceeds the third reference value, based on the comparison result. A third out-of-reference-value counting means 42, and a fourth out-of-reference-value counting means 43 for counting the number of times the measured data exceeds the fourth reference value, based on the comparison result of the fourth reference value comparing means 39. Based on the setting signal from the reference value setting switch 19 Based on the reference value setting discriminating means 44 for discriminating which one of the first to fourth reference values has been selected, and the discriminating signal from the reference value setting discriminating means 44, the first to fourth out-of-reference-value counting Call the count value according to the set reference value from the means 40 to 43,
An out-of-reference rate calculation means 45 for calculating the ratio of the time when the measurement data exceeds the set reference value is provided by the count value and the count value of the measurement number counting means 31.

In order to obtain the display control function, the control circuit 9 outputs the time-dependent change of temperature, humidity and dust measurement data to the display unit 13 and the maximum value, the minimum value and the average value. When the time change display mode is selected by the mode change switch 18 and the analysis result output means 47 for outputting the analysis result such as the value and the out-of-reference rate to the display unit 13, the time change output means 46 is operated to output the analysis result. Display control means 48 for operating the analysis result output means 47 when the display mode is selected is provided.

Further, in order to obtain the zero point correction function, the control circuit 9 outputs the zero point reference value to the storage means 30 when the output level of the dust sensor 8 does not become zero continuously for a predetermined time or longer. When the measured data of the first zero point correction means 49 and the dust sensor 8 updated to the minimum value within the above-mentioned predetermined time and written to zero or less, it is output to the storage means 30 and the zero point reference value is lowered by one rank. The second zero point correction means 50 for writing and the forced zero point correction means 51 for setting the minimum value during the operation for 15 minutes after the sensitivity changeover switch 19 is turned on as a zero point reference value based on the operation of the sensitivity changeover switch 19 are provided. ing. Here, the predetermined time is set to a time (for example, 100 hours) longer than the time measured at the place where the dirt is continuously contaminated in normal use.

Furthermore, the control circuit 9 calls the time-dependent change of the measurement data from the time-dependent change output means 46 and the analysis result from the analysis result output means 47 to obtain the external output function, and changes the time-dependent change of the measurement data. And an external output means 53 for outputting the analysis result to the external device 52. Incidentally, the counting means 31, 40, 41, 4
2, 43 and the first zero correction means 49 are counters.

The operation of the air quality detecting device will be described with reference to the flow charts of FIGS. 2 is a flow chart thereof, FIG. 3 is a flow chart relating to the analysis of the pollution situation by the dust concentration shown in FIG. 2A, FIG. 4 is a flow chart relating to the out-of-reference rate shown in FIG. 2B, and FIG.
6 is a flowchart relating to the display switching and external data output, and FIG. 6 is a flowchart relating to the zero point correction shown in D of FIG.

In FIG. 2, after the start, the first step is
The data stored in the storage means 30 of the control circuit 9 is read in 1 and each sensor 6, 7, 8 and the fan 5 are turned on in Step 2, and then each sensor 6, 7,
8 data is initialized. Then, in Step 4, the measurement number counting means 31 counts the number of measurements. The count value at this time is C. After that, in Step 5, the output signals of the respective sensors 6, 7, 8 are read, and in Step 6, the measurement data correction means 32 uses the measurement data correction unit 32 to detect the dust data of the dust sensor 8 based on the detection data from the temperature sensor 6 and the humidity sensor 8. After calculation and correction according to the above, the measured data is converted into the display data (digital signal) of the sensors 6, 7 and 8 at Step 7, and the data analysis step shown in FIG. 3 is started. Note that the calculation correction is performed by multiplying the dust data of the dust sensor 8 by a fixed correction rate. The correction rate is, for example, 1 at a room temperature of 20 ° C. and a humidity of 50% or more, and 1 at a humidity of 50% or less. Is set to 1.1 to 1.2.

When entering the data analysis step, first, Step
At p8, the maximum value updating means 33 compares the measured data with the maximum value stored in the storage means 30. If the measurement data is larger than the maximum value, the storage means 3 is set in Step 9.
The maximum value stored in 0 is updated and written in the measurement data, and if the measurement data is smaller than the maximum value, Ste
Move to p10. In Step 10, the minimum value updating unit 34 compares the measurement data with the minimum value stored in the storage unit 30. If the measurement data is smaller than the minimum value, the minimum value stored in the storage means 30 is updated and written in the measurement data in Step 11, and if the measurement data is larger than the minimum value, the process proceeds to Step 12.
Then, in Step 12, the average value calculating means 35 integrates the measurement data, and the integrated value B is used as the measurement number counting means 3
The average value is calculated by dividing by the count value C of 1. The storage means 30 has an initial value of 0.00 mg / m when the power is turned on.
³ is stored as the maximum value, and the minimum value from the previous operation is stored as the minimum value.

Next, in Step 13, the fourth reference value comparison means 39 compares the measured data with the fourth reference value (0.30 mg / m ³ ) stored in the storage means 30. If the measured data is larger than the fourth reference value, Step14
Then, the fourth out-of-reference counting means 43 counts the number of times the measured data exceeds the fourth reference value, and if the measured data is smaller than the fourth reference value, the process proceeds to Step 15. In Step 15, the third reference value comparing means 38 causes the measurement data and the third reference value (0.20 mg /
m ³ ). If the measurement data is larger than the third reference value, in Step 16, the number of times the measurement data exceeds the third reference value is counted by the third out-of-reference counting means 42, and if the measurement data is smaller than the third reference value, Move to Step 17. In Step 17, the second reference value comparison means 37 compares the measurement data with the second reference value (0.17 mg / m ³ ) stored in the storage means 30. If the measurement data is larger than the second reference value, in Step 18, the second out-of-reference counting means 41 counts the number of times the measurement data exceeds the second reference value. If the measurement data is smaller than the second reference value, Move to Step 19. At Step 19, the first reference value comparison means 36 causes the measurement data and the storage means 3 to be stored.
First reference value (0.15 mg / m ³ ) stored in 0
Compare with. If the measurement data is larger than the first reference value, the number of times the measurement data exceeds the second reference value is counted by the first out-of-reference counting means 40 in Step 20, and if the measurement data is smaller than the second reference value, The procedure moves to the out-of-reference rate calculation step shown in FIG. The count value of the fourth non-reference counting means 43 is D, the count value of the third non-reference counting means 42 is E, the count value of the second non-reference counting means 41 is F, and the count value of the second non-reference counting means 40. Be G.

When the out-of-standard rate calculation step is entered, Step
At 21, it is determined whether the reference value setting switch 19 has been operated. If the reference value setting switch 19 is not operated in Step 21, the process proceeds to Steps 30 to 38, and when the reference value setting switch 19 is operated, the reference value setting determination means 44 sets the reference value in Steps 22 to 29. That is, in Step 22, it is determined whether or not the reference value setting switch 19 has set the first reference value. If the first reference value has been set, in Step 23, the reference value is changed to the first reference value, and the first reference value is set. If not set to the standard value, St
Move to ep24. In Step 24, it is determined whether or not the second reference value is set by the reference value setting switch 19, and if it is set to the second reference value, the reference value is changed to the second reference value in Step 25, and the second reference value is set. If it is not set to, the process proceeds to Step 26. In Step 26, it is determined whether or not the third reference value is set by the reference value setting switch 19, and if the third reference value is set, S
In step 27, the reference value is changed to the third reference value, and if it is not set to the third reference value, the process proceeds to step 28. S
In step 28, it is determined whether or not the reference value setting switch 19 has set the fourth reference value. If the fourth reference value has been set, in step 29 the reference value is changed to the fourth reference value, and the fourth reference value is set. If not set to Step30
~ 38.

Then, in Steps 30 to 38,
By the out-of-reference rate calculation means 45, reference value setting determination means 44
Based on the discrimination signal from the first to the fourth out-of-reference-value counting means 40 to 43, the count value corresponding to the set reference value is called, and measured by the count value and the count value of the measurement number counting means 31. Calculate the ratio of the time when the data exceeds the set reference value. That is, in Step 30, it is determined whether or not the current reference value is set to the first reference value, and if the current reference value is the first reference value, in Step 31, the count value G of the first out-of-reference-value counting means 40. Is the calculation factor J of the out-of-standard rate,
If the current reference value is not the first reference value, the process proceeds to Step 32. In Step 32, it is determined whether or not the current reference value is set to the second reference value. If the current reference value is the second reference value, the count value F of the second out-of-reference-value counting means 41 is determined in Step 33. If the current reference value is not the second reference value as the calculation factor J of the out-of-reference rate, the process proceeds to Step 34. In Step 34, it is determined whether or not the current reference value is set to the third reference value. If the current reference value is the third reference value, the count value E of the third out-of-reference-value counting means 42 is determined in Step 35. If the current reference value is not the third reference value as the calculation factor J of the out-of-reference rate, the process proceeds to Step 36. St
In ep36, it is determined whether or not the current reference value is set to the fourth reference value, and if the current reference value is the fourth reference value, the count value D of the fourth out-of-reference-value counting means 43 is determined in Step 37. If the current reference value is not the fourth reference value as the calculation factor J of the out-of-reference rate, the process proceeds to Step 38. And S
In step 38, J, which is the calculation factor of the out-of-standard rate in steps 31, 33, 35, and 37, is counted number counting means 31.
The out-of-reference rate is calculated by dividing by the count value C of, and then the display control step and external output step shown in FIG. 5 are entered.

When the display control step and the external output step are entered, in step 39, the display control means 48 determines whether or not the time-dependent change display mode is selected by operating the mode changeover switch 18, and the time-dependent change display mode is selected. In this case, at Step 40, the time-dependent output means 46
Is operated to output changes over time of temperature, humidity, and dust measurement data to the display unit 13, and display the changes. on the other hand,
When the analysis result display mode is selected in Step 39, the analysis result output means 47 is operated in Step 41 to output the analysis result such as the maximum value, the minimum value, the average value and the out-of-reference rate to the display unit 13, and Is displayed. After that, in Step 42, the external output means 53 calls the time-dependent change of the measurement data from the time-dependent change output means 46 and the analysis result from the analysis result output means 47, and outputs the time-dependent change of the measurement data and the analysis result to the external device 52. Then, Fig. 6
The zero point correction step shown in is entered.

When the zero point correction step is entered, Step 43
Then, the first zero point correction means 49 is turned on, and in Step 44, it is judged whether or not the output level of the dust sensor 8 is continuously zero for a predetermined time (100 hours) or more, and when it is not zero for 100 hours or more, the process proceeds to Step 45. If not, the process proceeds to Step 48. Then, in Step 45, it is judged whether or not the minimum value is larger than zero, and if the minimum value is larger than zero, it is output to the storage means 30 in Step 46 and the zero point reference value is updated to the minimum value up to 100 hours. The process moves to the writing Step 47. On the other hand, if it is determined in Step 45 that the minimum value is smaller than zero, then St
Move to ep47. In Step 47, the count of the first zero point correction means 49 is cleared, and the process proceeds to Step 48.
This control is for coping with the case where relatively large particles of dust adhere to the dust sensor 8.

Then, in Step 48, the second zero point correction means 50 determines whether or not the measurement data of the dust sensor 8 is less than or equal to zero, and when the measurement data is less than or equal to zero, S
At step 49, it is output to the storage means 30 and the zero reference value is set to 1
Write down the rank and move to Step 50. On the other hand, if it is determined in Step 48 that the measurement data of the dust sensor 8 is not less than zero, the process directly proceeds to Step 50. This control is for coping with the case where the zero reference value is excessively increased by the first zero correction means 49.

At Step 50, forced zero point correction means 51
Is used to determine whether or not the sensitivity changeover switch 19 has been operated, and when the sensitivity changeover switch 19 is operated, St
The minimum value during 15 minutes of operation after the sensitivity changeover switch 19 is turned on in ep51 is set as the zero-point reference value, and the step shown in FIG.
Move to 52. On the other hand, when it is determined in Step 50 that the sensitivity changeover switch 19 is not operated, the process directly proceeds to Step 52. This control is for dealing with the case where the displayed data of the dust sensor 8 is obviously abnormal.

Thereafter, in Step 52, it is judged whether or not the measurement time has been reached. If the measurement time has not been reached, the process returns to Step 4 again, and if the measurement time has been reached, Step is reached.
Move to 53. Then, in Step 53, the sensors 6, 7, 8 and the fan 4 are turned off, and the measurement is completed. As described above, in the present embodiment, the control circuit 9 causes the reference value comparison means 36 to 39 to compare the measurement data of the dust sensor 8 with the respective reference values stored in the storage means 30, and obtain the comparison result. In particular, the out-of-reference-value counting means 40 to 43 count the number of times the measured data exceeds each reference value, and the out-of-reference rate calculating means 45 counts out of the reference value based on the determination signal from the reference value setting determination means 44. The count values corresponding to the reference value set by the reference value setting switch 19 are called from the means 40 to 43, and the out-of-reference rate is calculated based on the count value and the count value of the measurement number counting means 31. Therefore, the measurement data can be automatically analyzed. Therefore, even an inexperienced user can easily confirm the contamination status.

Moreover, when the time change display mode is selected by the mode changeover switch 18, the display control means 48 operates the time change output means 46 to display the time change data on the display unit 13 and display the analysis result. When the mode is selected, the analysis result output means 47 is operated to display the analysis data, so that the temporal change data and the analysis data can be easily confirmed even during the measurement.

Further, particularly when the zero point correction means 49 updates the zero point reference value to the minimum value up to that time when the output level of the dust sensor 8 does not become zero continuously for a predetermined time or longer, the dust sensor Even if dust with relatively large particles adheres to the device 8 and accurate detection of the dust becomes impossible, the measurement can be dealt with by coping with this, and the operation of the device is temporarily stopped to adhere to the dust sensor 8. There is no need to remove dust.
Therefore, the frequency of maintenance can be reduced.

Further, since the external output means 53 outputs the change over time of the measurement data and the analysis result thereof to the external device 52, the change over time of the measurement data and the analysis result thereof can be recorded, and the external device 52 can measure the size of the room. By inputting the selection factors for selecting the model of the air conditioner and the number of used air conditioners according to the purpose of use, the external device 52 automatically adjusts the size of the room and the air conditioner according to the purpose of use. It is possible to select the machine model and the number of machines used. That is, since the treated air volume Q in the room is obtained by the following equation, the ventilation volume Q ₀ (m ³ / h), the dust collection efficiency q (%) of the air conditioner, and the outdoor air concentration C ₀ ( mg / m ³ )
If the dust generation amount g (mg / h) is input, the treated air flow rate Q (m ³ / h) can be obtained, and if the maximum value, the minimum value, and the out-of-reference rate are corrected, the treated air flow rate Q is adapted. The model and number of units can be obtained.

[0034]

[Equation 1]

Next, a second embodiment of the present invention will be described in detail with reference to FIGS. FIG. 9 is a functional block diagram of a control circuit of the air quality detection device. In the present embodiment, a carbon dioxide gas (CO ₂ ) sensor 8 for detecting the indoor carbon dioxide (CO ₂ ) concentration is used as a pollution sensor, and an air conditioner model and its type according to the indoor size and purpose of use are provided. In order to select the number of units used, the state of indoor air pollution is measured and detected.

Then, as shown in FIG. 9, a control circuit 9 for automatically analyzing the pollution situation of the indoor air based on the output signals from the temperature sensor 6, the humidity sensor 7 and the CO ₂ sensor 8.
In order to obtain a measurement data analysis function, is a storage means (EEPROM) 30 for storing first to fourth reference values and maximum and minimum values in advance according to the purpose of use in the room, and a measurement for counting the number of measurements. a number counting means 31, the temperature sensor 6, based on the detection data from the humidity sensor 7, the temperature of the CO ₂ concentration data from CO ₂ sensor 8, and the measurement data correcting means 32 for correcting in accordance with the humidity, the measured data correcting means The measured data corrected in 32 is compared with the maximum value stored in the storage unit 30, and if the measured data is larger than the maximum value, the maximum value in the storage unit 30 is updated to the measured data and written. Value updating means 33, measurement data corrected by the measurement data correction means 32, and storage means 30
If the measurement data is smaller than the minimum value, the minimum value updating means 34 for updating the minimum value of the storage means 30 to the measurement data and writing the measurement data and the measurement data correcting means 32 are compared. Accumulate the corrected measurement data,
The average value calculating means 35 for calculating the average value of the measurement data by dividing by the count value of the measurement number counting means 31, the measurement data corrected by the measurement data correcting means 32, and the first value stored in the storage means 30. One reference value (for example, 0.07% /
m ³ ), a first reference value comparison means 36, the measurement data corrected by the measurement data correction means 32, and a second reference value (for example, 0.10) stored in the storage means 30.
% / M ³ ), the second reference value comparison means 37, the measurement data corrected by the measurement data correction means 32, and the third reference value stored in the storage means 30 (for example, 0.
15% / m ³ ) and third reference value comparing means 38
And a fourth reference value comparison means 39 for comparing the measurement data corrected by the measurement data correction means 32 with the fourth reference value (for example, 0.20% / m ³ ) stored in the storage means 30. Based on the comparison result of the first reference value comparing means 36, the comparison result of the first reference value outside counting means 40 for counting the number of times the measured data exceeds the first reference value and the second reference value comparing means 37 On the basis of the comparison result of the second out-of-reference-value counting means 41 that counts the number of times the measured data exceeds the second reference value, and the number of times the measured data exceeds the third reference value, based on the comparison result. Third reference value outside counting means 42 for counting
And a fourth out-of-reference-value counting means 43 for counting the number of times the measured data exceeds the fourth reference value based on the comparison result of the fourth reference value comparison means 39, and a setting signal from the reference value setting switch 19. , Reference value setting discriminating means 44 for discriminating which one of the first to fourth reference values has been selected.
And based on the discrimination signal from the reference value setting discrimination means 44,
The count value corresponding to the set reference value is called from the first to fourth non-reference value counting means 40 to 43, and the measured data exceeds the set reference value by the count value and the count value of the measurement number counting means 31. And a non-standard rate calculation means 45 for calculating the ratio of the different times.

In order to obtain the display control function, the control circuit 9 outputs the time-dependent change of temperature, humidity and CO ₂ measurement data to the display unit 13 and the maximum and minimum values. When the time change display mode is selected by the mode change switch 18 and the analysis result output means 47 which outputs the analysis result such as the average value and the out-of-reference rate to the display unit 13, the time change output means 46 is operated to perform analysis. Display control means 48 for operating the analysis result output means 47 when the result display mode is selected is provided.

Further, as in the first embodiment, the control circuit 9 displays the change with time of the measurement data and the analysis result in the external device 5.
The function to output to 2 is added. In this embodiment, since the CO ₂ sensor 8 is used, the control circuit 9 is not provided with the zero-point correcting function by the zero-point correcting means 49 as in the first embodiment, and other configurations are the same as those of the first embodiment. This is similar to the one embodiment.

The operation of the air quality detecting device will be described with reference to the flow charts of FIGS. 10 is a flow chart thereof, FIG. 11 is a flow chart relating to the analysis of the pollution situation by the dust concentration shown in FIG. 10A, FIG. 12 is a flow chart relating to the out-of-reference rate shown in B of FIG.
FIG. 13 is a flowchart relating to display switching and data external output shown in C of FIG.

In FIG. 10, Step 1 after the start
Since ~ Step 5 is the same as that of the first embodiment, the description thereof is omitted. In Step 6, by the measurement data correction means 32,
Based on the detection data from the temperature sensor 6 and the humidity sensor 8, the dust data of the CO ₂ sensor 8 is arithmetically corrected according to the temperature and humidity to obtain measurement data, and then at Step 7, the signals of the sensors 6, 7, and 8 are output. The display data (digital signal) is converted, and the data analysis step shown in FIG. 11 is started. Note that the calculation correction is performed by multiplying the CO ₂ data of the CO ₂ sensor 8 by a constant correction rate.
When the humidity is 50% or more, the value is 1, and when the humidity is 50% or less, the value is 1.1 to 1.2.

When entering the data analysis step, first, Step
At p8, the maximum value updating means 33 compares the measured data with the maximum value stored in the storage means 30. If the measurement data is larger than the maximum value, the storage means 3 is set in Step 9.
The maximum value stored in 0 is updated and written in the measurement data, and if the measurement data is smaller than the maximum value, Ste
Move to p10. In Step 10, the minimum value updating unit 34 compares the measurement data with the minimum value stored in the storage unit 30. If the measurement data is smaller than the minimum value, the minimum value stored in the storage means 30 is updated and written in the measurement data in Step 11, and if the measurement data is larger than the minimum value, the process proceeds to Step 12.
Then, in Step 12, the average value calculating means 35 integrates the measurement data, and the integrated value B is used as the measurement number counting means 3
The average value is calculated by dividing by the count value C of 1. The storage means 30 has an initial value of 0.00% / m ³ when the power is turned on.
Is stored as the maximum value, and the minimum value during the previous operation is stored as the minimum value.

Next, in Step 13, the fourth reference value comparison means 39 compares the measured data with the fourth reference value (0.20% / m ³ ) stored in the storage means 30. If the measurement data is larger than the fourth reference value, the number of times the measurement data exceeds the fourth reference value is counted by the fourth out-of-reference counting means 43 in Step 14, and if the measurement data is smaller than the fourth reference value, Move to Step 15. In Step 15, the third reference value comparison means 38 causes the measurement data and the third reference value (0.15% / m) stored in the storage means 30.
³ ) Compare with. If the measurement data is larger than the third reference value, in Step 16, the number of times the measurement data exceeds the third reference value is counted by the third out-of-reference counting means 42, and if the measurement data is smaller than the third reference value, Move to Step 17. In Step 17, the second reference value comparison means 37 compares the measurement data with the second reference value (0.10% / m ³ ) stored in the storage means 30. If the measurement data is larger than the second reference value, in Step 18, the second out-of-reference counting means 41 counts the number of times the measurement data exceeds the second reference value. If the measurement data is smaller than the second reference value, Move to Step 19. At Step 19, the first reference value comparison means 36 causes the measurement data and the storage means 30 to be stored.
It is compared with the first reference value (0.07% / m ³ ) stored in. If the measured data is larger than the first reference value,
In Step 20, the first out-of-reference counting means 40 counts the number of times the measurement data exceeds the second reference value. If the measurement data is smaller than the second reference value, the process goes to the out-of-reference rate calculation step shown in FIG. .. The count value of the fourth non-reference counting means 43 is D, the count value of the third non-reference counting means 42 is E, the count value of the second non-reference counting means 41 is F, and the second non-reference counting means 4 is
The count value of 0 is G.

When the out-of-standard rate calculation step is entered, Step
At 21, it is determined whether the reference value setting switch 19 has been operated. If the reference value setting switch 19 is not operated in Step 21, the process proceeds to Steps 30 to 38, and when the reference value setting switch 19 is operated, the reference value setting determination means 44 sets the reference value in Steps 22 to 29. That is, in Step 22, it is determined whether or not the reference value setting switch 19 has set the first reference value. If the first reference value has been set, in Step 23, the reference value is changed to the first reference value, and the first reference value is set. If not set to the standard value, St
Move to ep24. In Step 24, it is determined whether or not the second reference value is set by the reference value setting switch 19, and if it is set to the second reference value, the reference value is changed to the second reference value in Step 25, and the second reference value is set. If it is not set to, the process proceeds to Step 26. In Step 26, it is determined whether or not the third reference value is set by the reference value setting switch 19, and if the third reference value is set, S
In step 27, the reference value is changed to the third reference value, and if it is not set to the third reference value, the process proceeds to step 28. S
In step 28, it is determined whether or not the reference value setting switch 19 has set the fourth reference value. If the fourth reference value has been set, in step 29 the reference value is changed to the fourth reference value, and the fourth reference value is set. If not set to Step30
~ 38.

Then, in Steps 30 to 38,
By the out-of-reference rate calculation means 45, reference value setting determination means 44
Based on the discrimination signal from the first to the fourth out-of-reference-value counting means 40 to 43, the count value corresponding to the set reference value is called, and measured by the count value and the count value of the measurement number counting means 31. Calculate the ratio of the time when the data exceeds the set reference value. That is, in Step 30, it is determined whether or not the current reference value is set to the first reference value, and if the current reference value is the first reference value, in Step 31, the count value G of the first out-of-reference-value counting means 40. Is the calculation factor J of the out-of-standard rate,
If the current reference value is not the first reference value, the process proceeds to Step 32. In Step 32, it is determined whether or not the current reference value is set to the second reference value. If the current reference value is the second reference value, the count value F of the second out-of-reference-value counting means 41 is determined in Step 33. If the current reference value is not the second reference value as the calculation factor J of the out-of-reference rate, the process proceeds to Step 34. In Step 34, it is determined whether or not the current reference value is set to the third reference value. If the current reference value is the third reference value, the count value E of the third out-of-reference-value counting means 42 is determined in Step 35. If the current reference value is not the third reference value as the calculation factor J of the out-of-reference rate, the process proceeds to Step 36. St
In ep36, it is determined whether or not the current reference value is set to the fourth reference value, and if the current reference value is the fourth reference value, the count value D of the fourth out-of-reference-value counting means 43 is determined in Step 37. If the current reference value is not the fourth reference value as the calculation factor J of the out-of-reference rate, the process proceeds to Step 38. And S
In step 38, J, which is the calculation factor of the out-of-standard rate in steps 31, 33, 35, and 37, is counted number counting means 31.
The out-of-reference rate is calculated by dividing by the count value C of, and then the display control step and external output step shown in FIG. 5 are entered.

In the display control step and the external output step, as in the first embodiment, when the time-dependent change display mode is selected, the time-dependent change output means 4 is selected at Step 40.
6 is operated to output the time-dependent changes in the temperature, humidity and dust measurement data to the display unit 13 for display. On the other hand, when the analysis result display mode is selected, Step
At 41, the analysis result output means 47 is operated to output the analysis results such as the maximum value, the minimum value, the average value, and the out-of-reference rate to the display unit 13 and display them. After that, Step4
In step 2, the external output means 53 calls the temporal change of the measurement data from the temporal change output means 46 and the analysis result from the analysis result output means 47, and outputs the temporal change of the measurement data and the analysis result to the external device 52.

Thereafter, in Step 52, it is judged whether or not the measurement time has been reached. If the measurement time has not been reached, the process returns to Step 4 again, and if the measurement time has been reached, Step 4
Move to 53. Then, in Step 53, the sensors 6, 7, 8 and the fan 4 are turned off, and the measurement is completed. As described above, also in this embodiment, as in the first embodiment, the automatic measurement data analysis and the change with time / analysis result can be displayed.

Further, since the external output means 53 outputs the change over time of the measurement data and the analysis result thereof to the external device 52, the change over time of the measurement data and the analysis result thereof can be recorded, and the external device 52 can measure the size of the room. By inputting the selection factors for selecting the model of the air conditioner and the number of used air conditioners according to the purpose of use, the external device 52 automatically adjusts the size of the room and the air conditioner according to the purpose of use. It is possible to select the machine model and the number of machines used. That is, since the required ventilation amount Q ₀ (m ³ / h) in the room is calculated by the following equation, the number of persons M
(Person), outside air CO ₂ concentration C ₀ (% / m ³ ) and CO ₂ generation amount per person g (m ³ / person · h), the required ventilation amount Q ₀ (m ³ / h) ) Is obtained and correction is performed using the maximum value, the minimum value, and the out-of-reference rate, it is possible to obtain the compatible model and the number of units from this processing air volume Q. In the formula, C _i is the indoor CO ₂ concentration (% / m ³ ).

[0048]

[Equation 2]

The present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention. For example, both the dust sensor and the carbon dioxide sensor may be used to automatically analyze the measurement data.

[0050]

As is apparent from the above description, according to claims 1 and 2 and 3 of the present invention, the reference value comparing means compares the measurement data of the contamination sensor with each reference value stored in the storing means. Then, based on the comparison result, the out-of-reference-value counting means counts the number of times the measured data exceeds each reference value, and based on the determination signal from the reference-value setting determination means, the out-of-reference rate calculation means counts outside the reference value. The count value corresponding to the reference value set by the reference value setting switch is called from the means, and the out-of-reference rate is calculated by the count value and the count value of the measurement number counting means, so that the measurement data is automatically analyzed. It can be performed. Therefore, even an inexperienced user can easily confirm the contamination status.

Moreover, when the time-dependent change display mode is selected by the mode changeover switch, the display control means operates the time-dependent change output means to display the time-dependent change data on the display section, and the analysis result display mode is selected. In this case, since the analysis result output means is operated to display the analysis data, it is possible to easily confirm the temporal change data and the analysis data even during the measurement.

According to the fourth aspect, the zero point correction means updates the zero point reference value to the minimum value up to that time when the output level of the dust sensor does not become zero continuously for a predetermined time or longer. Even if dust with relatively large particles adheres to the sensor and accurate detection of dust becomes impossible, measurement can be continued by coping with this, and the operation of the device can be temporarily stopped to remove dust adhering to the dust sensor. Eliminates the need to remove. Therefore, the frequency of maintenance can be reduced.

According to the present invention, since the external output means outputs the change over time of the measurement data and the analysis result thereof to the external device, the change over time of the measurement data and the analysis result thereof can be recorded, and the external device can be stored indoors. By inputting the selection factors for selecting the appropriate air conditioner model and the number of used air conditioners, the external device can automatically select the model and the number of used air conditioners according to the room. Is possible.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a control circuit of an air quality detection device according to a first embodiment of the present invention.

FIG. 2 is a flowchart of the same.

FIG. 3 is a flowchart relating to a contamination status analysis based on the dust concentration shown in FIG. 2A.

FIG. 4 is a flowchart relating to an out-of-reference rate shown in B of FIG.

5 is a flowchart relating to display switching and data external output shown in C of FIG.

FIG. 6 is a flowchart relating to the zero point correction shown in D of FIG.

FIG. 7 is a front view of the air quality detection device.

FIG. 8 is a schematic diagram showing an internal structure of an air quality detection device.

FIG. 9 is a functional block diagram of a control circuit of the air quality detection device according to the second embodiment of the present invention.

FIG. 10 is a flowchart of the same.

FIG. 11 is a flowchart relating to a contamination status analysis based on the dust concentration shown in A of FIG.

FIG. 12 is a flowchart relating to an out-of-reference rate shown in B of FIG.

FIG. 13 is a flowchart relating to display switching and data external output shown in C of FIG.

[Explanation of symbols]

 8 Contamination Sensor 9 Control Circuit 13 Display 18 Mode Changeover Switch 19 Reference Value Setting Switch 30 Storage Means 31 Measurement Counting Means 36-39 Reference Value Comparing Means 40-43 Non-reference Value Counting Means 44 Reference Value Discriminating Means 45 Non-reference Rate Calculation means 46 Time-dependent change output means 47 Analysis result output means 48 Display control means 49 Zero point correction means 52 External device 53 External output means

Claims (5)

[Claims] 1. A method for measuring and detecting the state of pollution of indoor air in order to select the model of the air conditioner and the number of units to be used according to the room, and the state of factors affecting the pollution of indoor air. A pollution sensor (8) that detects the amount, a control circuit (9) that automatically analyzes the pollution status of indoor air based on the output signal from the pollution sensor (8), and a change and control of dust concentration over time. A display section (13) for displaying the analysis result by the circuit (9), a mode changeover switch (18) for switching the display of the display section (13) between a temporal change display mode and an analysis result display mode, and indoor use A reference value setting switch (19) for setting a reference value according to the purpose, and the control circuit (9), a storage means (30) for storing a plurality of reference values in advance according to the purpose of use in the room, The measurement number counting means (31) for counting the number of measurements and the measurement data of the contamination sensor (8) Reference value comparison means (36) for comparing the data with each reference value stored in the storage means (30)
~ (39) and based on the comparison result of the reference value comparison means (36) ~ (39), out-of-reference value counting means (40) ~ (43) for counting the number of times the measured data exceeds the reference value ), And a reference value setting determination means (44) for determining which one of the reference values should be set based on the setting signal from the reference value setting switch (19), and the reference value setting determination means (44). 44) based on the discrimination signal from the reference value outside counting means (40) ~ (43) to call the count value according to the set reference value, the count value and the measurement number counting means
Using the count value of (31), the out-of-standard rate calculation means (45) for calculating the ratio of the time when the measurement data exceeds the set reference value, and the change-over-time output means for outputting the change over time of the measurement data on the display unit ( 46), the analysis result output means (47) for outputting the out-of-reference rate to the display unit, and the time-dependent change output means (46) is activated when the time-dependent change display mode is selected by the mode selector switch (18). When the analysis result display mode is selected, the air quality detection device further comprises display control means (48) for operating the analysis result output means (47). 2. An air quality detecting device according to claim 1, wherein the pollution sensor (8) is a dust sensor for detecting a dust concentration in the air. 3. The air quality detecting device according to claim 1, wherein the pollution sensor (8) is a carbon dioxide sensor for detecting the concentration of carbon dioxide in the air. 4. The air quality detecting device according to claim 2,
The control circuit (9) has a zero point correction means for updating the zero point reference value to the minimum value within the predetermined time when the output level of the dust sensor (8) does not become zero continuously for a predetermined time or longer.
(49) is provided, The air quality detection device characterized by the above-mentioned. 5. The air quality detecting device according to any one of claims 1 and 2, wherein the control circuit (9) outputs, to an external device (52), an external output means (53) for outputting the change over time of the measured data and the analysis result thereof. ) Is provided, the air quality detection device.