KR102370486B1 - Powered air purifying respirator and tuning method therefor - Google Patents

Abstract

The present invention relates to an electric purified air respirator, and more specifically, to an electric purified air respirator which has a built-in filter which filters air and a blower operated by a power source, and purifies by inhaling external air through the blower and the filter, and has an air guide pipe which is connected to guide and supply the purified air to the air guide pipe through the wind pressure of the blower. The present invention is provided with a driving speed regulator for controlling the driving speed of the blower, so that RPM or a discharge flow rate or a flow rate can be corrected.

Description

Electric purified air respirator and tuning method for the same

The present invention relates to an electric purified air respirator, and to an electric purified air respirator that purifies external air to enable breathing.

In general, electric purified air respirator purifies and supplies external air to a worker who works in polluted air or a patient who has difficulty in self-breathing. These electric purified air respirator can actually pump purified air and provide artificially, so that the operator or patient can breathe easily.

As shown in FIGS. 1 and 2, the prior art to be described later is representative of such an electric purified air respirator, and as shown in FIG. 1, after the blower 4 and the filter 5 are built-in, the grill ( A cover 3b having 3c) is coupled to the body 3 providing purified air and an air guide tube 2 connected to the body 3 to guide the purified air to the mask 1 or other device. is composed In the electric purified air respirator 10, as the button 3a of the main body 3 is operated, the blower 4 is operated to blow the external air through the grill 3c of the cover 3b to the inside of the main body 3 inhale with Then, the electric purified air respirator 10 is guided to the air guide tube 2 by the wind pressure of the blower 4 after the inhaled air is purified by the filter 5 . That is, the electric purified air respirator 10 forcibly supplies the purified air through the air guide tube (2). Accordingly, the operator or the patient can easily breathe the purified air even when worn on the waist as shown in FIG. 2 .

Patent Registration Nos. 10-1257681 (Auto Swing) and No. 10-1579438 (Auto Swing) of the Korean Intellectual Property Office both relate to the aforementioned electric purified air respirator. The aforementioned patent registration No. 10-1257681 uses a precision air volume sensor that can be electronically detected in the blower without using a separate air volume display device to display a graphic screen on which the air volume level meter can be displayed in the form of a blower device or a separately manufactured remote control. In particular, it can be checked during work, so that the information of the system can be easily and accurately recognized and taken action. Also, even when the worker is wearing a respirator and a blower, check the air volume condition and check the remaining battery capacity, expected usage time, or blower device. By installing a two-way wireless or specially manufactured wired remote control that can exchange operation and information, it is possible to control the electronic welding surface through infrared or wireless communication using the designated electronic welding surface. In consideration of escape prevention and loss prevention and operation due to switch error, information display and control device for electric respirator mounted on a belt or a designated location is provided.

And, the above-mentioned Patent Registration No. 10-1579438, the worker wears a respirator; an air purifier connected to the respirator through an air supply pipe, and provided with a filter device for purifying external polluted air flowing into the respirator; and a control unit controllably provided in the air purifier. In the information recognition structure of a filter device mounted on an air purification device of a respirator comprising a, the air purification device and the filter device are wirelessly interconnected by any one of various wireless methods, the filter device information data including a filter type and load factor, final use time, total use time, remaining use time, and replacement time of It has a structure in which a pre-filter and a wire mesh are installed on the outside of the dust filter or odor filter, and an LCD panel for displaying the type of filter device provided in the air purification device and the load factor of the filter device is provided on one side of the upper surface of the air purification device The control unit compares the information data including the serial number of the provided filter device with the information data pre-stored in the control unit, and in the case of a pre-stored filter device, at the last use time at work, and in the case of not the pre-stored filter device Counting is performed from the first use time during work, and when the work is completed, the counting is completed to store information data including the last use time, total use time, remaining use time, and filter type, When the remaining use time is less than a predetermined time of the total use time, it provides an information recognition structure of the filter device mounted on the air purification device of the respirator, characterized in that configured to notify the operator of the replacement time of the filter device.

On the other hand, in the case of a normal adult, the respiratory volume in a normal state is about 30 Lpm, but the required respiratory volume may increase depending on the severity of the work to be performed. Therefore, it is essential that the electric purified air respirator has the ability to adjust the blow rate (flow rate) step by step.

In addition, the blower 4 described above has some tolerances even if it is precisely manufactured due to manufacturing characteristics, and due to such tolerances, even if the same voltage is applied to the motor, it is difficult to implement the same number of revolutions, that is, the same flow rate for each blower 4 . can

On the other hand, in the case of an electric purified air respirator, when used for a long time in a polluted environment, dust and the like are adsorbed to the filter. Since these filters have a structure like a spider's web when fine fibers with a diameter of about 10 μm or less are combined with each other, the filtration effect is not only reduced when dust, etc. is continuously adsorbed, but also acts as a resistance to the motor of the blower (4) to provide a blowing effect. cause a decrease in

Therefore, as described above, the flow rate difference due to the manufacturing tolerance of the blower and the flow rate difference due to the blockage of the filter are factors that can inhibit the user's breathing environment, so that the blower motor can form an appropriate flow rate during the manufacturing phase and use. The number of revolutions, that is, the driving speed of the blower must be adjusted.

However, in the prior art described above, the blower 4 is manufactured in a state with a flow rate difference as it is not configured to control the driving speed of the blower 4 in the manufacturing stage, and the driving speed of the blower 4 is reduced even when in use. Since it cannot be adjusted, even if the filter 5 is clogged and the ventilation is not smooth, it cannot be corrected.

And, since the prior art is not configured to precisely correct the flow rate of air to a desired flow rate during use, it is necessary to reduce inconvenience somewhat in use and use.

Korean Patent Registration No. 10-1257681 Korean Patent Registration No. 10-1579438

The present invention was created to solve the above problems, and by adjusting the driving speed of the blower during manufacturing, an electric purified air respirator capable of correcting the RPM or the discharge flow rate of the blower to a set RPM or a desired flow rate, and this The purpose is to provide a tuning method for

In particular, the RPM of the blower can be corrected with the standard RPM by adjusting the power value applied to the blower. The purpose is to provide an electric purified air respirator capable of maximally suppressing excessive power consumption and a tuning method for the same.

Another object is to provide an electric purified air respirator capable of freely adjusting the discharge flow rate even during use and a tuning method for the same.

The electric purified air respirator of the present invention for achieving the above object has a built-in filter for filtering air and a blower operated by a power source therein, and purifies by inhaling external air through the blower and the filter, As an electric purified air respirator equipped with a main body connected to a guide tube to guide and supply purified air to the air guide tube through the wind pressure of the blower, an input unit for inputting driving information related thereto; Based on the driving RPM of the blower or the flow rate or flow rate of the air discharged from the blower, by adjusting the driving speed of the blower by adjusting the power value or duty value for driving the blower, the RPM of the blower or the air discharged flow rate of or a drive speed regulator to correct the flow rate; and a control unit for controlling the power applied to the input unit, the driving speed regulator, and the blower for driving the blower.

The driving speed regulator may include: a driving RPM of the blower driven by the driving information of the input unit, or a measurement sensor for measuring a discharge flow rate of air discharged from an outlet of the blower; a standard value storage unit storing at least one of a standard RPM or a standard flow rate of the blower and a standard duty value for driving the blower so that the blower is driven according to the input driving information of the input unit; At least one of an allowable RPM value for correcting the driving RPM of the blower, and an allowable flow rate and an allowable duty value for correcting the discharge flow rate of the air discharged from the blower to the standard flow rate of the standard value storage unit is stored. wealth; The difference value is calculated by comparing the driving RPM measured by the measurement sensor, the measured flow rate, or the increased duty value increased to increase the flow rate with the standard RPM, the standard flow rate, or the standard duty value stored in the standard value storage unit, or the calculated difference a comparator for calculating a comparison value by comparing the value with an allowable RPM value, an allowable flow velocity, or an allowable duty value of the correction reference value storage unit; and a correction unit for correcting the driving RPM or the discharge flow rate of the blower by varying the power value or duty value based on the difference value or the comparison value calculated by the comparison unit so that the driving speed of the blower is adjusted. can do.

On the other hand, the driving speed regulator is discharged from the blower a correction reference value storage unit in which a flow rate correction duty value for correcting by increasing or decreasing the flow rate is stored; a timer for counting the correction time for stepwise correcting the flow rate of the blower; and stepwise varying the duty value of the power applied to the blower based on the flow rate correction duty value of the correction reference value storage unit so that the driving speed of the blower is increased or decreased to correct the discharge flow rate, or to increase or decrease the discharge flow rate. A compensator for correcting the discharge flow rate by setting the duty value selected during the correction time of the timer from among the duty values that were changed stepwise for the increase or decrease of the discharge flow rate so that the driving speed is set in any one step; .

The body further includes a;

The flow gauge may include: a ball ascending and descending by the wind pressure of the air provided from the blower to the air guide pipe; and a gauge housing in which the ball is mounted to be lifted and the ball is see-through.

The gauge housing, characterized in that the display line is displayed in the middle portion to confirm the elevation height of the ball.

The RPM tuning method of the electric purified air respirator according to the present invention is a blowing mode driving step of inputting the driving information of the blower through the input unit provided in the above-described electric purified air respirator to drive the blower in a set blowing mode ; a driving RPM measuring step of measuring the driving RPM of the blower; a difference value calculating step of calculating a difference value by comparing the measured driving RPM with a pre-stored standard RPM of the blowing mode; an RPM exceeding checking step of checking whether the calculated difference value exceeds a preset allowable RPM; an RPM correction step of correcting the RPM of the blower by varying the power value applied to the blower; and a correction value storage step of storing the power value applied to the RPM correction of the blower.

The above-described RPM tuning method includes: an additional correction checking step of confirming whether or not the RPM of another blowing mode is corrected after the storage of the power value applied to the RPM correction is completed; and a repeating step of sequentially repeating the blowing mode driving step to the correction value storing step in order to correct the RPM of the other blowing mode.

In the RPM correction step, it is characterized in that the driving RPM of the blower is applied by varying the power value that can reach the standard RPM of the blowing mode so that the RPM of the blower is corrected to the standard RPM.

The flow rate tuning method of the electric purified air breathing apparatus of the present invention includes: a blowing mode driving step of inputting driving information of the blower through the input unit provided in the electric purified air respirator to drive the blower in a set blowing mode; a flow rate measuring step of measuring the flow rate of air discharged by the blower; a flow rate comparison step of comparing the measured flow rate with a preset standard flow rate and comparing whether it corresponds to a standard flow rate; a duty value increasing step of increasing a duty value for driving the blower so that the flow rate of the blower that is less than the standard flow rate is corrected; a flow rate increase confirmation step of re-measuring the flow rate of the blower to confirm whether the flow rate of the blower is increased by the increased duty value; a difference value calculating step of calculating a difference value by comparing the increased duty value with a preset standard duty value of the blowing mode; a duty value excess checking step of confirming whether the calculated difference value exceeds a preset allowable duty value; and a driving mode determining step of maintaining the blowing mode or checking a lower blowing mode and driving an alert for a lower blowing mode or a warning according to the result of checking the excess.

The flow rate comparison step may include: a flow rate difference value calculating step of calculating a difference value of the flow rates by comparing the measured flow rate and the standard flow rate; and a flow velocity value under-checking step of confirming whether the difference value is less than a preset allowable flow velocity value.

The flow rate tuning method of the electric purified air respirator according to the present invention comprises: a blowing mode driving step of inputting driving information of the blower through the input unit provided in the electric purified air respirator to drive the blower in a set blowing mode; a flow rate correction selection step of inputting driving information for selecting a flow rate correction through the input unit; a flow rate variable step of varying the duty value for driving the blower based on a plurality of preset fine variable duty values so that the flow rate is corrected by adjusting the driving speed of the blower to vary the discharge flow rate of the blower; and a flow rate setting step of setting the discharge flow rate of the blower that was variable by setting a duty value for driving the blower to any one finely variable duty value selected from among the finely variable duty values.

The flow rate variable step may include: a lowest duty value driving step of driving the blower based on the lowest finely variable duty value among the plurality of finely variable duty values; and a changed duty value driving step of driving the blower by changing the duty value to at least one upper fine variable duty value having a duty value greater than the lowest fine variable duty value among the plurality of fine variable duty values. do.

The flow rate variable step checks whether the duty value changed in the changed duty value driving step corresponds to a preset best fine variable duty value, and according to the check result, the duty value is higher than the duty value changed in the changed duty value driving step It further includes; changing the duty value to a finely variable duty value, or checking the highest duty value in which the driving step of the lowest duty value and the driving step of the changed duty value are sequentially performed again.

The above-mentioned flow rate tuning method, while the blower is driven by the minimum fine variable duty value or the upper fine variable duty value, the lowest fine variable duty value or the upper fine variable duty value is selected, preset It further includes; a selection time counting step of counting the selection time.

In the present invention as described above, since the driving speed of the blower can be adjusted by the driving speed controller, the RPM or the flow rate or the flow rate of the blower can be corrected through the driving speed controller.

In particular, since the RPM can be adjusted during the manufacture of the blower, it is possible to provide a set flow rate during use, and to correct the duty value required for driving the blower based on the discharge flow rate during use. And since the duty value can be finely corrected, the discharge flow rate can be precisely adjusted.

And, since the ball of the flow gauge moves up and down according to the discharge flow rate, it can be easily adjusted while checking the rising ball when adjusting the discharge flow rate.

In addition, since the driven RPM of the blower can be corrected close to the standard RPM by comparing the standard RPM of the blowing mode in operation with the driven RPM of the blower being driven, the RPM can be stably and easily corrected.

In addition, by comparing the standard flow rate of the corresponding blowing mode being driven and the measured flow rate measured in real time, the duty value required for driving the blower is increased to increase the discharge flow rate, so that it is possible to provide a flow rate suitable for the actual use environment.

In addition, the standard and measured flow rates of the corresponding blowing mode and the difference between the standard and measured flow rates are compared through the allowable flow rate, or the standard duty value of the corresponding blowing mode and the increased duty value applied to increase the flow rate. , and whether the difference between the standard duty value and the increased duty value is within the allowable range is compared through the allowable duty value to determine the duty value for flow velocity correction. can

In addition, since the flow rate of the corresponding blowing mode can be finely varied through the flow rate correction duty value, the flow rate can be precisely increased or decreased according to the situation.

Moreover, since the variable duty value is varied by 0.005 points within the range of the flow compensation duty value, the flow rate can be corrected very precisely, and the duty value is changed by 0.005 points for a set time, and the ball of the flow gauge changes according to the change. Since it ascends and descends, a desired flow volume can be set easily.

1 is a schematic exploded perspective view of an electric purified air respirator according to the prior art;
Figure 2 is a side view showing the use state of the electric purified air respirator shown in Figure 1;
3 is a block diagram showing the configuration of an electric purified air respirator according to an embodiment of the present invention;
Fig. 4 is a block diagram showing the flow gauge shown in Fig. 3;
Fig. 5 is a front view showing a state of use of the flow gauge shown in Fig. 4;
6 is a flowchart illustrating an RPM tuning method according to an embodiment of the present invention;
7 is a flowchart illustrating a flow rate tuning method according to an embodiment of the present invention;
8 is a flowchart illustrating a flow rate tuning method according to an embodiment of the present invention; and
9 is a linear graph showing a change in the energization ratio of the finely variable duty value applied to the flow rate tuning method of FIG. 8 .

Hereinafter, the electric purified air respirator according to an embodiment of the present invention and a tuning method therefor will be described with reference to the accompanying drawings. given and explained.

The electric purified air respirator according to an embodiment of the present invention includes a main body 3 , an input unit 52 , a driving speed controller 60 and a control unit 51 as shown in FIG. 3 . As shown, the main body 3 has a built-in filter 5 for filtering air and a blower 4 operated by a power source, as shown, an air guide tube 2 connected to a device for breathing such as a mask 1 ) is installed. The body 3 may, for example, be configured as a case in which a cover 3b having a ventilation grill 3c is mounted as shown in FIG. 1 described above. Since the main body 3 has the same configuration as the existing one, a detailed description thereof will be omitted.

The main body 3 sucks outside air into the inside by the operation of the blower 4 , and purifies the air sucked through the filter 5 inside. The main body 3 guides the air rectified by the filter 5 to the air guide tube 2 through the wind pressure of the blower 4 and supplies it to the same device as the mask 1 described above. The main body 3 drives the blower 4 as power is supplied from a power source 54 composed of a battery or an external power source (not shown).

The input unit 52 is a component for inputting driving information for driving the blower 4 . The input unit 52 may be configured as, for example, a button or a touch panel (not shown) and integrally installed in the main body 3 . The input unit 52 transmits driving information for driving the blower 4 as a signal to the control unit 51 to be described later. The input unit 52 transmits driving information such as on/off of the power of the blower 4 or step-by-step blowing mode driving for determining the air volume or flow rate correction mode driving for flow rate correction to the control unit 51 . The step-by-step blowing mode may consist of, for example, a first step of providing air at a flow rate of about 170Lpm, a second step of providing air at a flow rate of about 190Lpm, and a third step of providing air at a flow rate of about 210Lpm. This flow rate is the standard flow rate for each stage of the blowing mode.

The drive speed controller 60 controls the power value or duty value for driving the blower 4 based on the flow rate or flow rate of the air discharged to the outlet of the blower 4 or the rpm of the blower 4 . By adjusting the driving speed of the blower 4 through, the RPM of the blower 4 or the flow rate or flow rate of the discharged air is corrected. The control unit 51 controls the operation of the above-described input unit 52 , the driving speed controller 60 , and the power supply unit 54 for driving the blower 4 .

The driving speed controller 60 includes, for example, a measurement sensor 62 , a standard value storage unit 63 , a correction reference value storage unit 64 , a comparison unit 65 , and a correction unit 67 as shown in FIG. 3 . can be configured. The measurement sensor 61 measures the discharge flow rate of air discharged from the discharge port of the blower 4 or the driving RPM of the blower 4 . Since the measurement sensor 61 may be configured as a conventional pressure sensor or encoder, a detailed description thereof will be omitted.

The standard value storage unit 63 is the standard RPM or standard flow rate of the blower 4 and/or the blower 4 so that the blower 4 can be driven in response to the input driving information input through the above-described input unit 52. The standard duty value for driving is stored. The standard RPM is, for example, 4,700 rpm in the case of the first stage of the blowing mode (flow rate of 170 Lpm), 4,900 rpm in the case of the second stage (flow of 190 Lpm), and 5,100 rpm in the case of the third stage (flow rate of 210 Lpm). The standard flow rate may be, for example, 2.36 m/sec in the case of the first stage, 2.90 m/sec in the case of the second stage, and 3.41 m/sec in the case of the third stage. The standard duty value may be composed of, for example, 0.3 points in the case of the first stage, 0.4 points in the case of the second stage, and 0.5 points in the case of the third stage.

The correction reference value storage unit 64 is an allowable RPM value for correcting the driving RPM of the blower 4, or allowable for correcting the discharge flow rate of the air discharged from the blower 4 to the standard flow rate of the standard value storage unit 63 The duty value is stored. The allowable RPM may be, for example, 100 rpm. The allowable duty value may be configured as, for example, 0.1 point. The correction reference value storage unit 64 may store an allowable flow rate as will be described later. The allowable flow rate may be configured as, for example, 0.1 m/sec.

The comparator 65 compares the driving RPM or flow rate measured by the measurement sensor 61 with the standard RPM or standard flow rate stored in the standard value storage unit 63, or increases the duty value increased for increasing the flow rate as will be described later. A difference value is calculated by comparing with the above-described standard duty value, or a comparison value is calculated by comparing the calculated difference value with an allowable RPM value, an allowable duty value, or an allowable flow rate of the correction reference value storage unit 64 .

The compensator 67 adjusts the driving speed of the blower 4 by varying the power value or the duty value of the power source for driving the blower 4 based on the difference value or the comparison value calculated by the comparator 65 . The correction unit 67 corrects the driving RPM or the discharge flow rate or the discharge flow rate of the blower 4 by adjusting the driving speed of the blower 4 .

Here, the aforementioned correction reference value storage unit 64 may be configured to store a flow rate correction duty value for correcting by increasing or decreasing the flow rate of air discharged from the blower 4 in stages. To this end, the aforementioned driving speed controller 60 may be provided with a timer 66 as shown in FIG. 3 . This timer 66 counts the correction time for stepwise correcting the flow rate of the blower (4).

Meanwhile, the body 3 may be provided with a flow gauge 20 as shown in FIG. 3 . When the flow rate of air is corrected by the above-described correction reference value storage unit 64 and the timer 66, the flow gauge 20 displays the corrected flow rate for visual confirmation. As shown in FIGS. 4 and 5 , the flow gauge 20 receives discharge air through a branch pipe branched from the flow path connected from the main body 3 to the air guide pipe 2 . Accordingly, the flow gauge 20 indicates the flow rate of the air flowing through the air guide tube 2 .

The flow gauge 20 is, for example, as shown in FIGS. 4 and 5, the balls 21 and these balls 21 that rise and fall by the wind pressure of the air provided from the blower 4 to the air guide tube 2 are It can be configured to include a gauge housing 23 that is built-in to be lifted and the ball 21 is see-through to the outside. As shown in the figure, the gauge housing 23 may have a mark line 23a displayed in the middle to check the elevation height of the ball 21 .

On the other hand, as shown in FIG. 3 , the main body 3 may be provided with an alert 56 that emits a warning sound, a warning illumination light, or a warning vibration. Such an alert 56 may be composed of a conventional speaker, lamp, or vibration motor.

According to the embodiment of the present invention configured as described above, as shown in FIGS. 6 to 8 , the driving RPM of the blower 4 or the discharged flow rate or flow rate can be corrected. A detailed description of these corrections is as follows.

< 1. Driving RPM correction >

In order to correct the driving RPM, the blower 4 is operated by inputting driving information through the input unit 52 as shown in FIGS. 3 and 6 . At this time, when the input unit 52 is configured as a power button, the preset first-stage blowing mode is automatically performed together with “ON”. That is, when “ON” is inputted through the input unit 52 , the control unit 51 recognizes the first stage blowing mode driving information and operates the blower 4 in the first stage blowing mode (S11 in FIG. 6 ).

Here, the above-described input unit 52 may be configured to be provided with a first-stage blowing mode button, a second-stage blowing mode button, a third-stage blowing mode button, and the like, separately from the power button, as described above. In this case, the control unit 51 recognizes the blowing mode corresponding to the manipulated button as driving information.

The measurement sensor 61 measures the driving RPM when the blower 4 is operated and applies the measured value to the comparison unit 65. (S12 in FIG. 6) The comparison unit 65 is stored in the standard value storage unit 63. After extracting the stored standard RPM of the corresponding blowing mode, that is, the first-stage blowing mode, and comparing it with the measured RPM measured by the measurement sensor 61, a difference value (RPM difference value) is calculated. (S13 in FIG. 6) And the comparison The unit 65 checks whether the calculated difference value exceeds the allowable RPM value (100 rpm) pre-stored in the correction reference value storage unit 64 ( S14 in FIG. 6 ). For example, the standard RPM of the step 1 blowing mode and When the allowable RPM value is set to 4,700 rpm and 100 rpm, respectively, as described above, and the measured RPM measured by the measurement sensor 61 is 4,550 rpm or 4,850 rpm, the comparator 65 calculates 150 rpm as the difference value and , by comparing the difference between the RPM and the allowable RPM, a comparative value (RPM comparison value) exceeding 50 rpm from the allowable RPM (100 rpm) is calculated. Next, the comparator 65 determines that the difference value is out of 50 rpm in the range (1-100 rpm) of the allowable RPM, and applies information about the excess of the allowable RPM to the controller 51 . At this time, the comparator 65 applies the calculated difference value or comparison value (excess RPM comparison value) together.

The compensating unit 67 is a power value or duty for driving the blower 4 based on the above-described difference or comparison value so that the above-described RPM difference value (150rpm) reaches the range of the aforementioned allowable RPM (100rpm). change the value. That is, the compensating unit 67 adjusts the driving speed of the blower 4 so that the driving RPM of the blower 4 reaches the standard RPM of the blowing mode of the corresponding stage, the power value or duty value for driving the blower 4 to automatically correct the RPM of the blower (4) by increasing or decreasing At this time, the correcting unit 67 is preferably operated to correct the driving RPM by varying the power value for boosting or decreasing the voltage of the power supply unit 54 applied to the blower 4 . Accordingly, the blower 4 is corrected to drive RPM to an RPM within the range of allowable RPM (100 rpm) based on the aforementioned standard RPM (4,700 rpm). (S15 in FIG. 6)

As described above, the control unit 51 stores the power value or duty value applied to the correction of the driving RPM in the above-described correction reference value storage unit 64 ( S16 in FIG. 6 ). When the driving information of the first stage blowing mode is input through the input unit 52, it is driven with the power value or duty value for the first stage stored in the correction reference value storage unit 64, so it is always driven with the driving RPM corresponding to the set standard RPM to provide the required flow rate (170Lpm) in the first stage blowing mode.

As described above, after the RPM correction of the first-stage blowing mode is completed, the correcting unit 67 is configured to input the driving information of another blowing mode, that is, the second-stage blowing mode corresponding to the next stage, through the input unit 52, as described above. The process (S11 to S16 in FIG. 6) as described above is sequentially performed again by one component, and the driving RPM of the blower 4 is corrected to correspond to the standard RPM (4,900rpm) of the next step. The correcting unit 67 corrects the driving RPM of the blower 4 up to the blowing mode of the last step (eg, step 3) in the above-described order, and then ends the RPM correction. Consequently, when there is an additional blowing mode for correcting the driving RPM, the correction unit 67 sequentially repeats the above-described process again to correct the driving RPM.

Here, when the above-described correction unit 67 corrects the driving RPM for each step, as shown in FIG. 6 , the difference value between the standard RPM and the measured RPM does not occur, or the calculated difference value falls within the allowable RPM range. In this case, the driving RPM of the blower 4 is not corrected. Then, the correction unit 67 ends the RPM correction process when there is no need to correct the RPM of another stage after correcting the driving RPM of one stage, that is, when driving information of another stage is not input.

For reference, the reason for correcting the driving RPM of the blower 4 based on the actual driving RPM of the blower 4 is not based on the flow rate discharged from the blower 4 when correcting the driving RPM of the blower 4 as described above. This is because the measurement reliability (measurement accuracy) is lower than that of the driving RPM due to the discharge port side structure of the blower 4 or the assembling distribution. Therefore, it is preferable that the RPM of the blower 4 is corrected based on the driving RPM.

< 2. Compensation of discharge flow rate >

In the embodiment of the present invention, when the air supply is not smooth because the filter 5 of the main body 3 is contaminated, the flow rate can be corrected through the above-described components. For example, when the 1st, 2nd, or 3rd stage blowing mode is driven through the input unit 52, the blower 4 provides the standard flow rate as described above in the blowing mode for each stage, at each stage. Flow rates of 170 Lpm and 190 Lpm and 210 Lpm should be provided respectively. At this time, the standard flow rates are 2.36 m/sec, 2.90 m/sec, and 3.41 m/sec, respectively, as described above.

However, the blower 4 cannot provide the above-described standard flow rate and standard flow rate when the flow rate and flow rate are lowered due to contamination of the filter 5. To explain this in more detail, the blower 4 is the standard value stored in the standard value storage unit 63. When the difference value between the measured flow rate measured by the standard flow rate and the measurement sensor 61 exceeds 0.1 m/sec, the above It provides a flow rate that is about 3-5% less than the flow value of one standard flow rate. Therefore, the blower (4) needs to be adjusted to the driving speed so that breathing is smooth and the flow rate is corrected.

If the two-stage blowing mode is described as an example with respect to the correction of the flow rate, the blower 4 is rotated at about 4,900 rpm when it is driven in the two-stage blowing mode through the input unit 52. (S21 in FIG. 7) At this time, the measuring sensor 61 measures the flow rate discharged from the blower 4 and applies the measured flow rate to the comparator 65. (S22 in FIG. 7) The measuring sensor 61, if the measured flow rate is 2.75 m In the case of /sec, this is applied to the comparison unit 65 .

The comparison unit 65 compares the measured flow rate with the standard flow rate stored in the standard value storage unit 63, that is, the standard flow rate (2.90 m/sec) of the preset two-stage blowing mode to calculate a difference value (flow rate difference value). Then, the difference value is transmitted to the control unit 51 . That is, the comparison unit 65 compares the standard flow rate of 2.90 m/sec and the measured flow velocity of 2.75 m/sec, calculates a difference value of 0.15 m/sec, and transmits the difference value to the control unit 51 (Fig. 7, S23)

The compensating unit 67 increases the duty value so that the driving speed of the blower 4 is increased so that the flow rate of the blower 4 that is less than the standard flow rate is corrected. (S24 in FIG. 7) At this time, the compensating unit 67 increases the duty value in a range that does not exceed the allowable duty value (0.1 point) pre-stored in the correction reference value storage unit 64 by the above-described variable duty value. That is, the correction unit 67 is Increase the duty value only within the range of 0.01~0.1 points. The reason that the allowable duty value is set in this range is that when the duty value changed to drive the blower 4 is changed by more than 0.1 point, the battery of the power supply unit 54 is excessively discharged and the use time is significantly reduced. because it decreases. If, by the 2,600mAh DC power of the lithium-ion battery, the blower 4 is driven in the three-stage blowing mode, the blower 4 is driven for about 6 hours by the 0.4 point duty value, which is the standard duty value of the three-stage blowing mode. However, since the electric purified air respirator must comply with the usage time of 4 hours, the usage time may not be observed if the allowable duty value is set to exceed 0.1 point from the standard duty value. That is, the electric purified air respirator may not comply with the usage time if the duty value is increased by more than 0.5 point from the standard duty value of 0.4 point. Therefore, the allowable duty value is preferably set in the range as described above to prevent excessive discharging of the battery.

The correction unit 67 increases the duty value within the range of the above-described allowable duty value. The correction unit 67 preferably increases the duty value by 0.01 points from the standard duty value of 0.4 points in the two-stage blowing mode, for example. That is, the correction unit 67 is 0.41 points, 0.42 points... Increase the duty value by 0.49 points. As for the blower 4, the driving speed is increased by the increase of the duty value, so that the flow rate is increased. Therefore, the blower 4 provides a flow rate corresponding to the standard flow rate by increasing the flow rate, or provides an increased flow rate than before increasing the duty value.

Meanwhile, when the initial duty value is increased, the control unit 51 checks whether the flow rate is increased according to the increased duty value through the measured flow rate applied in real time from the measurement sensor 61 . When the flow rate does not rise, the control unit 51 increases (increased) the duty value by 0.01 point again through the correction unit 67, and then checks whether the flow rate has risen again (S26 in FIG. 7). The control unit 51 If the proper flow rate or flow rate is not realized even if the increased duty value is increased to 0.1 point, the blowing mode is changed to a lower blowing mode to prevent excessive discharge of the battery due to exceeding the allowable duty value. At this time, the control unit 51 changes to the lower blowing mode after checking whether the lower blowing mode exists. That is, the control unit 51 changes the blowing mode from the 2-stage blowing mode to the 1-stage blowing mode. However, when there is a risk of excessive consumption of the battery due to the non-existence of the lower blowing mode, the control unit 51 activates the alarm 56 to warn that there is a problem in increasing the flow rate by changing the flow rate (FIG. 7). S28, S29, S30)

Here, the above-described comparison unit 65 compares the standard duty value and the increased duty value when the flow rate increases when the increase in the measured flow rate is confirmed by the increase in the duty value, unlike the above-described difference value (duty difference). value) is calculated. Then, the comparison unit 65 checks whether the calculated difference value exceeds the allowable duty value pre-stored in the correction reference value storage unit 64 . For example, the comparison unit 65 calculates a difference value of 0.11 point when the duty value is increased to 0.51 point in the blowing mode of the second stage and the measured flow rate rises, and compares this difference value with the allowable duty value. A comparison value (duty comparison value) in which 0.01 points are exceeded is calculated. That is, the comparison unit 65 checks whether the difference value exceeds the allowable duty value. Accordingly, the comparator 65 determines that the difference value is out of the allowable duty value range (0.1 point) and applies information about the excess of the allowable duty value to the controller 51 . At this time, the comparison unit 65 applies the calculated difference value or the comparison value together. (S27 of FIG. 7 )

As described above, the control unit 51 checks whether a lower blowing mode exists as described above based on the applied difference value or comparison value as described above, and then changes the blowing mode to the lower blowing mode or operates an alert 56 . (S28, S29, S30 in Fig. 7)

On the other hand, the comparison unit 65 compares the standard flow rate of 2.90 m/sec and the measured flow rate of 2.75 m/sec as described above, and when the measured flow rate is equal to or greater than the standard flow rate, the driving of the corresponding blowing mode being driven (S23 of FIG. 7) The comparator 65 may directly increase the duty value as described above when the measured flow rate is smaller than the standard flow rate. On the other hand, the comparator 65 calculates a difference value (flow velocity difference value: 0.15 m/sec) between the measured flow velocity and the standard flow velocity, and then stores this difference value in the correction reference value storage unit 64 for the above-described allowable flow velocity ( 0.1 m/sec) and calculates a comparison value exceeding 0.05 m/sec. (S24 of FIG. 7 ) That is, the comparator 65 checks whether the difference value exceeds the allowable flow velocity. Accordingly, the comparison unit 65 determines that the difference value is out of the allowable flow velocity range (0.01 to 0.1 m/sec) and applies information about the allowable flow velocity excess to the correcting unit 67 . At this time, the comparison unit 65 applies the calculated difference value and the comparison value together. Accordingly, the compensating unit 67 increases the flow rate by increasing the duty value to increase the driving speed of the blower 4 as described above (S25 in FIG. 7). In conclusion, the compensating unit 67 increases the flow rate. increase the flow rate through In this way, the flow rate is automatically increased through variable flow rate, so that the user can work smoothly during field work. In particular, the user can work smoothly because the flow rate of air for breathing is automatically increased even if the filter 5 is somewhat clogged during operation.

Here, the above-described control unit 51 may store the increased duty value, which has been increased to increase the flow rate as described above, in the correction reference value storage unit 64 . Accordingly, when the blower 4 is driven again in the blowing mode of the same stage next time, the blower 4 can be rotated at a driving speed according to the stored increased duty value.

< 3. Discharge flow correction >

An embodiment of the present invention can precisely control the flow rate even while using the blowing mode of a desired stage. For example, the user can adjust the flow rate during operation if the user has a large amount of activity and the respiration rate is greatly increased or if the flow rate of the corresponding ventilation mode is a little excessive.

In this case, the user first drives the desired blowing mode through the input unit 52 and then selects the flow rate correction through the input unit 52 ( S41 and S42 in FIG. 8 ). At this time, the input unit 52 is connected to the power button However, when the corresponding blow mode button is operated for a long time or a separate flow rate correction button is operated, driving information corresponding to the flow rate correction driving mode is applied to the control unit 51 . The control unit 51 adjusts the driving speed of the blower 4 through the correction unit 67 to increase or decrease the flow rate discharged from the blower 4 . At this time, the correction unit 67 adjusts the driving speed of the blower 4 by increasing the duty value based on the flow rate correction duty value previously stored in the correction reference value storage unit 64 . That is, the compensator 67 adjusts the driving speed of the blower 4 by adjusting the duty value of the power applied to the blower 4 to the aforementioned flow rate correction duty value. (S44 in FIG. 8)

Here, the aforementioned flow rate correction duty value may be set in a range from, for example, -0.030 point to +0.030 point. The control unit 51 varies the duty value by applying the flow rate correction duty value to the standard duty value of the corresponding blowing mode being driven. For example, when the compensator 67 is driven in the two-stage blowing mode, the above-described flow rate correction duty value is applied to the two-stage standard duty value of 0.4 point to vary the duty value between 0.37 point and 0.43 point. At this time, it is preferable that the compensating unit 67 is configured to sequentially vary the duty value by 0.005 points so that the duty value is finely changed and the flow rate is precisely controlled. That is, the correction unit 67 sequentially varies the duty value by 0.005 points from 0.37 points corresponding to the lowest value of the flow rate correction duty value. Accordingly, the flow correction duty value for the variable is 0.375 point, which is an increase of 0.005 points from the 0.37 point of the above-mentioned lowest value, corresponds to the lowest fine variable duty value, and increases by 0.005 to reach 0.43 point of the above-mentioned highest value, so 0.43 point is the highest fine-variable duty value.

When the flow rate compensation driving mode starts, the compensator 67 changes the duty value to 0.375 points of the lowest fine variable duty value described above, and then sequentially increases it by 0.005 points to 0.43 points of the highest fine variable duty value step by step. After the duty value is varied, the duty value is again varied in stages from the lowest fine variable duty value to the highest fine variable duty value again.

As described above, when any one of the steps to be finely changed is selected by the input unit 52 while finely varying the duty value of the two-step blowing mode step by step, the control unit 51 through the correction unit 67 The blower 4 is driven with the selected flow rate compensation duty value. (S45 in FIG. 8) At this time, the compensator 67 sets (sets) the duty value for driving the blower 4 to the flow rate compensation duty value of the selected stage. ) to store the selected flow rate correction duty value in the correction reference value storage unit 64, and the flow rate correction duty value stored as described above so that the blower 4 can continue to maintain the discharge flow rate corresponding to the set flow rate correction duty value. The blower 4 is driven. (S49 of FIG. 8) Accordingly, the blower 4 is driven with the duty value of the two-stage blowing mode varied within the range of the flow rate correction duty value. (S50 of FIG. 8)

As described above, whenever the standard duty value of the two-step blowing mode is varied by 0.005 points, the correction unit 67 checks whether the previously applied fine variable duty value corresponds to the best fine variable duty value described above. (FIG. S47 of 8) If the correction unit 67 does not correspond to the highest fine variable duty value as a result of the check, the fine variable duty value is changed to the next higher fine variable duty value to be applied next, and then the fine variable duty value is selected. That is, the correction unit 67 changes the duty value by 0.005 points to the previously applied fine variable duty value again, and then checks whether the fine variable duty value is selected. (S48 of FIG. 8 )

However, if the above-mentioned confirmation result corresponds to the highest fine variable duty value, that is, 0.43 point, the correcting unit 67 changes the fine variable duty value back to the initial duty value and then increases it again by 0.005 (FIG. 8). of S47), that is, the correction unit 67 repeats the above-described process again while changing the duty value required for driving the blower 4 to 0.37 point, which is the lowest finely variable duty value, and then sequentially increasing it again by 0.005.

Meanwhile, the correction unit 67 may vary the flow rate correction duty value by 0.005 points according to the counting of the timer 66 provided in the driving speed controller 60 as shown in FIG. 3 . The timer 66 may be set, for example, to have a counting time of 5 seconds. The timer 66 starts counting when the flow rate correction is selected through the input unit 52 rule as described above (S43 in FIG. 8). At this time, the correction unit 67 sets the standard duty value of the two-stage blowing mode as described above. The blower 4 is driven by changing to the lowest fine variable duty value (0.37 point).

When the flow rate correction duty value is not selected after counting, the timer 66 initializes counting and then starts counting again. After checking whether this corresponds to the above-mentioned highest fine variable duty value (0.43 points), if not, the process of varying the fine variable duty value by 0.005 points is repeated. (S47 of FIG. 8)

As a result, the flow rate correction duty value is varied by 0.005 points at intervals of 5 seconds by the timer 66 as shown in FIG. 9 . That is, the flow rate compensation duty value is changed by 0.005 points every 5 seconds from -0.03 point to +0.03 point. At this time, as shown in FIG. 9 , the flow correction duty value is changed from 0 point to +0.03 point, then the variation is stopped for 5 seconds, and then it is preferably changed from -0.03 point to 0 point again. That is, in the case of the two-stage blowing mode, the standard duty value is varied from 0.4 point to 0.43 point, and then the change is stopped for 5 seconds, and then the duty value is changed from 0.37 point to 0.4 point again.

On the other hand, as shown in FIG. 4, the flow gauge 20 connected to the main body 3 is, as described above, the driving speed of the blower 4 is finely adjusted by the flow correction duty value, as shown in FIG. As shown, the ball 21 ascends and descends. After checking the ascending and descending ball 21, the user selects the flow rate correction through the input unit 52 as described above when the desired flow rate is reached. Accordingly, the controller 51 stores the selected duty value as described above.

Here, the aforementioned ball 21 moves up and down around the display line 23a as shown in FIG. 5 . As described above, when the duty value is varied by 0.005 points, the ball 21 rises little by little from the display line 23a and then descends to the lower part of the gauge housing 23 when the duty value increase is stopped, and the duty value is variable again. As a result, it rises to the display line 23a.

In the embodiment of the present invention as described above, since the driving speed of the blower 4 can be adjusted by the driving speed controller 60, the RPM or the flow rate or flow rate of the blower 4 can be corrected through the driving speed controller 60. can

In particular, since the RPM can be adjusted during the manufacture of the blower 4, a set flow rate can be provided during use, and the duty value required for driving the blower 4 can be corrected based on the discharge flow rate during use, so that the filter 5 is contaminated. It is possible to increase the supply flow rate even if it is blocked by the

And, since the ball 21 of the flow gauge 20 moves up and down according to the discharge flow rate, it can be easily adjusted while checking the rising ball 21 when adjusting the discharge flow rate.

In addition, since the driving RPM of the blower 4 can be corrected close to the standard RPM by comparing the standard RPM of the blowing mode being driven with the driving RPM of the blower 4 being driven, the RPM can be stably and easily corrected. .

In addition, by comparing the standard flow rate of the corresponding blowing mode being driven and the measured flow rate measured in real time, the duty value required for driving the blower 4 is increased to increase the discharge flow rate, so it is possible to provide a flow rate suitable for the actual use environment.

In addition, the standard and measured flow rates of the corresponding blowing mode and the difference between the standard and measured flow rates are compared through the allowable flow rate, or the standard duty value of the corresponding blowing mode and the increased duty value applied to increase the flow rate. , and whether the difference between the standard duty value and the increased duty value is within the allowable range is compared through the allowable duty value to determine the duty value for flow velocity correction. can

In addition, since the flow rate of the corresponding blowing mode can be finely varied through the flow rate correction duty value, the flow rate can be precisely increased or decreased according to the situation.

Moreover, since the variable duty value is varied by 0.005 points within the range of the flow compensation duty value, the flow rate can be corrected very precisely, and the duty value is varied by 0.005 points for a set time, and the flow gauge 20 according to the change. Since the ball 21 of the elevating and lowering, it is possible to easily set a desired flow rate.

Since the above-described embodiment is merely a description of a preferred embodiment of the present invention, the scope of application of the present invention is not limited thereto, and appropriate modifications (structure or configuration of structure or configuration) within the scope of the same idea if the essential characteristics can be satisfied. change, partial omission or supplementation) is possible. In addition, some or a plurality of features of the above-described embodiments may be combined with each other. Therefore, since the structure and configuration of each component shown in the embodiment of the present invention can be implemented by modification or combination, it is natural that such modification or combination of the structure and configuration belongs to the appended claims of the present invention.

1: Mask 2: Air tube
3; Body 4: Blower
5: filter 20: flow gauge
21: ball 23: gauge housing
23a: display line 51: control unit
52: input unit 54: power unit
56: alert 60: drive speed controller
62: measurement sensor 63: standard value storage unit
64: correction reference value storage unit 65: comparison unit
66: timer 67: correction unit

Claims (10)

A filter that filters air and a blower operated by a power source are built-in, and external air is purified by intake through the blower and the filter, and an air guide pipe is connected to supply the purified air through the wind pressure of the blower. As an electric purified air respirator equipped with a main body that guides and supplies through a guide tube,
an input unit for inputting driving information related to on/off of power for driving the blower or air volume or flow rate;
Based on the driving RPM of the blower or the flow rate or flow rate of the air discharged from the blower, by adjusting the driving speed of the blower by adjusting the power value or duty value for driving the blower, the RPM of the blower or the air discharged flow rate of or a drive speed regulator to correct the flow rate; and
Includes; a control unit for controlling the power applied to the input unit, the driving speed regulator and the blower for driving the blower;
The drive speed regulator,
a measurement sensor for measuring a driving RPM of the blower driven by the driving information of the input unit, or a discharge flow rate of air discharged from an outlet of the blower;
a standard value storage unit storing at least one of a standard RPM or a standard flow rate of the blower and a standard duty value for driving the blower so that the blower is driven according to the input driving information of the input unit;
At least one of an allowable RPM value for correcting the driving RPM of the blower, and an allowable flow rate and an allowable duty value for correcting the discharge flow rate of the air discharged from the blower to the standard flow rate of the standard value storage unit is stored. wealth;
The difference value is calculated by comparing the driving RPM measured by the measurement sensor, the measured flow rate, or the increased duty value increased to increase the flow rate with the standard RPM, the standard flow rate, or the standard duty value stored in the standard value storage unit, or the calculated difference a comparator for calculating a comparison value by comparing the value with an allowable RPM value, an allowable flow velocity, or an allowable duty value of the correction reference value storage unit; and
Electric purification comprising; a correction unit for correcting the driving RPM or discharge flow rate of the blower by varying the power value or duty value based on the difference value or the comparison value calculated by the comparison unit so that the driving speed of the blower is adjusted Air respirator. delete delete A filter that filters air and a blower operated by a power source are built-in, and external air is purified by intake through the blower and the filter, and an air guide pipe is connected to supply the purified air through the wind pressure of the blower. An electric purified air respirator provided with a main body for guiding and supplying the guide tube, comprising: an input unit for turning on/off power for driving the blower or inputting driving information regarding air volume or flow rate; Based on the driving RPM of the blower or the flow rate or flow rate of the air discharged from the blower, by adjusting the driving speed of the blower by adjusting the power value or duty value for driving the blower, the RPM of the blower or the air discharged flow rate of or a drive speed regulator to correct the flow rate; and a control unit for controlling the power applied to the input unit, the driving speed regulator, and the blower for driving the blower; in the RPM tuning method of the blower provided in the electric purified air respirator comprising a;
a blowing mode driving step of inputting driving information of the blower through the input unit provided in the electric purified air respirator to drive the blower in a set blowing mode;
a driving RPM measuring step of measuring the driving RPM of the blower;
a difference value calculating step of calculating a difference value by comparing the measured driving RPM with a pre-stored standard RPM of the blowing mode;
an RPM exceeding checking step of checking whether the calculated difference value exceeds a preset allowable RPM;
an RPM correction step of correcting the RPM of the blower by varying the power value applied to the blower; and
A correction value storage step of storing the power value applied to the RPM correction of the blower; RPM tuning method of the electric purified air respirator comprising a. A filter that filters air and a blower operated by a power source are built-in, and external air is purified by intake through the blower and the filter, and an air guide pipe is connected to supply the purified air through the wind pressure of the blower. An electric purified air respirator provided with a main body for guiding and supplying the guide tube, comprising: an input unit for turning on/off power for driving the blower or inputting driving information regarding air volume or flow rate; Based on the driving RPM of the blower or the flow rate or flow rate of the air discharged from the blower, by adjusting the driving speed of the blower by adjusting the power value or duty value for driving the blower, the RPM of the blower or the air discharged flow rate of or a drive speed regulator to correct the flow rate; and a control unit for controlling the power applied to the input unit, the driving speed regulator, and the blower for driving the blower; in a flow rate tuning method for tuning the flow rate by the blower of the electric purified air respirator comprising a,
a blowing mode driving step of inputting driving information of the blower through the input unit provided in the electric purified air respirator to drive the blower in a set blowing mode;
a flow rate measuring step of measuring the flow rate of air discharged by the blower;
a flow rate comparison step of comparing the measured flow rate with a preset standard flow rate and comparing whether it corresponds to a standard flow rate;
a duty value increasing step of increasing a duty value for driving the blower so that the flow rate of the blower that is less than the standard flow rate is corrected;
a flow rate increase confirmation step of re-measuring the flow rate of the blower to confirm whether the flow rate of the blower is increased by the increased duty value;
a difference value calculating step of calculating a difference value by comparing the increased duty value with a preset standard duty value of the blowing mode;
a duty value excess checking step of confirming whether the calculated difference value exceeds a preset allowable duty value; and
A driving mode determination step of maintaining the blowing mode according to the check result of the excess or driving an alarm for a low blowing mode or warning by checking a low blowing mode; . According to claim 5, wherein the flow rate comparison step,
a flow rate difference value calculating step of comparing the measured flow rate and the standard flow rate to calculate a difference value of the flow rates; and
A flow rate tuning method of an electric purified air respirator comprising a; the difference value is less than the flow rate value checking step of checking whether the difference is less than the preset allowable flow rate value. delete delete delete delete

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