TWI459988B - Respirator testing apparatus and testing method thereof - Google Patents

Description

Respiratory mask measuring device and measuring method thereof

The present invention relates to a measuring device and a measuring method thereof, and more particularly to a measuring device for a respiratory mask and a measuring method thereof.

Respirator is a protective device that provides personal protection against damage from harmful elements in the air and is the last level to prevent harmful substances from harming the human body.

A qualified respiratory protective device must be able to effectively reduce the chance of contaminants being inhaled by the wearer. In general, when wearing a respiratory protection device, air pollutants can be mainly introduced into the protective device through three ways, including flowing through the filter material, the surface body is not close, and the exhalation valve leaks.

The most common disposable mask is the simplest respiratory protection. Disposable masks are widely used because of their light weight, reasonable price, and ease of use. In addition, because the disposable mask is relatively simple in design, except that the bridge of the nose is fixed by a bead, it is generally not designed to be close to the wearer. Therefore, to prevent the inhalation of droplets of contaminants, it is not effective to wear a mask, because the degree of tightness between the mask and the face is also an important key. Higher levels of respiratory protection, such as half masks or full masks, typically utilize a resilient rubber body that allows the respiratory protection to be more intimate The wearer's face is one of the most important test items in the test of respiratory masks in various regions.

Because the face types vary from region to region, for example, the facial contours of European and American people are wider and deeper than Asians, so it is often difficult for manufacturers of respiratory protection in Asia to obtain the results of the adhesion test of European face-type respiratory protection devices. data. However, it is time consuming and labor intensive to send it to a test laboratory in Europe and America. Therefore, how to establish quantitative and objective data of the fit degree is a subject of respiratory protection manufacturers.

The invention provides a measuring device for a respiratory mask and a measuring method thereof, which can provide an objective and conforming test result of a real human body.

The invention provides a measuring device for a respiratory mask. The measuring device of the respiratory mask comprises a standard human head, a breathing simulator and a leak detector. The standard head wears a breathing mask to be tested. The Breath Simulator provides a simulated human breathing to standard human head. The leak detector is used to detect the tightness of the breathing mask. The breathing simulator includes an eccentric crank circle and a cylinder. The eccentric crank circle drives the stroke of the cylinder, and the cylinder accordingly generates a simulated human breathing gas to the standard human head.

In an embodiment of the invention, the amount of exhalation that simulates the breathing of the human body exhibits a sinusoidal change with respect to time.

In an embodiment of the invention, the measuring device of the respiratory mask further comprises a rotary table. The rotary table carries a standard human head and is rotated to provide multiple test actions for a standard human head.

In an embodiment of the invention, the measuring device of the breathing mask further comprises a support frame. The support frame is used to support the rotary table.

In an embodiment of the invention, the test action includes a standard human head standing still, swinging left and right, swinging up and down, tilting forward, tilting backward, tilting to the left, and tilting to the right.

In an embodiment of the invention, the measuring device of the breathing mask further comprises an exhalation channel, an inhalation channel and a switching valve. The exhalation channel connects the standard head and breathing simulator. Simulated human breathing gas flows into the standard human head through the expiratory channel. The inspiratory channel connects the standard head and breathing simulator. Simulated human breathing gas flows out of the standard human head through the inhalation channel. The switching valve is connected to the exhalation channel, the inhalation channel and the breathing simulator to match the frequency of the simulated human breathing gas, and to control whether the exhalation channel and the inspiratory channel are conductive or non-conducting.

In an embodiment of the invention, the exhalation channel comprises a filter and a saturator. The filter filters impurities that flow into the standard human head to simulate human breathing. The saturator adjusts the moisture that simulates the breathing of the human body.

In an embodiment of the invention, the breathing mask is selected from one of the following respiratory protection devices: a filtered respiratory protection device, a powered air filtration respiratory protection device, a gas cylinder type respiratory protection device, and a supplied air breathing device. defensive equipment.

An embodiment of the present invention proposes a method for measuring a respiratory mask. The method of measuring the respiratory mask includes the following steps. Wear a breathing mask to be tested on a standard human head. Next, an eccentric crank circle is used to drive the stroke of a cylinder to generate a simulated human breathing gas to the standard human head. After that, the adhesion of the respiratory mask is detected.

Based on the above, in an exemplary embodiment of the present invention, the breathing simulator in the respiratory mask measuring device utilizes an eccentric crank circle to drive the stroke of the cylinder, The cylinder is thereby generated to simulate human breathing. This simulates the human body's breathing gas close to the real situation of the human body, which means that the expiratory volume of the human body breathing gas exhibits a sine wave change with respect to time. In the measuring method according to an embodiment of the present invention, the standard human head wearing the breathing mask to be tested is placed on the rotating table, and the rotating table is used to provide various test actions of the standard human head, and then cooperate with the breathing of the human body. Simulate the gas so that an objective breathing mask test result can be obtained.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a schematic view of a respiratory mask measuring device according to an embodiment of the present invention. Referring to FIG. 1 , the respiratory mask measuring device 100 of the present embodiment includes a breathing simulator 110 , a leak detector 120 , and a standard human head 130 . The standard head 130 is fitted with a breathing mask 200 to be tested. The breathing simulator 110 provides a simulated human breathing gas to the standard human head 130. The leak detector 120 is in communication with the interior of the respiratory mask 200 for detecting the tightness of the respiratory mask 200. Additionally, the breathing simulator 110 includes an eccentric crank circle 112 and a cylinder 114. The eccentric crank circle 112 drives the stroke of the cylinder 114 such that the cylinder 114 accordingly generates simulated human breathing gas to the standard human head 130.

In more detail, the respiratory mask measuring device 100 of the present embodiment is applied to detect the degree of adhesion of the respiratory mask 200 to the standard human head 130. Here, the degree of adhesion refers to the ratio of the concentration of the particles in the environment to the inside and outside of the respiratory mask 200. Specifically, when the respiratory mask measuring device 100 performs the measurement, The leak detector 120, for example, first measures the concentration of particles outside the respiratory mask 200, and then measures the concentration of particles in the respiratory mask 200, thereby dividing the concentration of particles outside the respiratory mask 200 by the concentration of particles in the respiratory mask 200 to obtain a respiratory mask. The tightness of 200. That is to say, the degree of tightness can be calculated by the following formula: the tightness coefficient = 100 / the amount of internal leakage (%), wherein the amount of internal leakage (%) = (the concentration of particles in the breathing mask) / (the particles in the environment) Concentration) × 100%.

In the present embodiment, the respiratory mask measuring device 100 replaces the live human test with a standard human head 130, and measures the tightness of the respiratory mask 200 with a breathing simulator 110 that can provide a simulated human body. In terms of the test fit of the real person, because the face contours of Europeans and Asians are quite different, and because of the regional relationship of the manufacturing place, it is difficult to test. If the test is performed using standard human heads of different face types, the test results can be more objective. Therefore, the standard human head 130 can use different heads of different regions to obtain different face shapes, and the data of the respiratory mask 200 is more universal.

On the other hand, in the present embodiment, the respiratory mask measuring device 100 further includes an exhalation passage 154a, an inhalation passage 154b, and a switching valve 152. The standard human head 130 is coupled to the breathing simulator 110 by an exhalation passage 154a, an inhalation passage 154b, and a switching valve 152. The exhalation passage 154a and the intake passage 154b are connected to the switching valve 152. The breathing simulator 110 communicates with the inspiratory passage 154b via the switching valve 152 and the exhalation passage 154a. In detail, the simulated human breathing gas provided by the breathing simulator 110 flows into and out of the standard human head 130 by using the exhalation passage 154a and the inhalation passage 154b, respectively. That is, call When the gas state occurs, the human body's respiratory airflow is simulated into the standard human head 130; when the inhalation state occurs, the simulated human respiratory gas flows out of the standard human head 130. Among them, the switching valve 152 is switched in accordance with the exchange frequency of the inhalation and exhalation in the simulated human respiratory gas to change the conduction between the breathing simulator 110 and the exhalation passage 154a and the inhalation passage 154b. Therefore, the switching frequency of the switching valve 152 must be switched in accordance with the frequency of the simulated human breathing gas generated by the breathing simulator 110, so that the simulated human breathing gas is correctly supplied to the standard human head 130.

In order to more realistically simulate the respiratory gas composition of the human body, the expiratory passage 154a of the present embodiment includes a filter 180 and a saturator 140. The breathing simulator 110 simulates the ambient air into the exhalation channel 154a and filters it through the filter 180 to remove impurities to obtain a breathing gas that is closer to the human body. The saturator 140 is used to provide moisture to the expiratory passage 154a to simulate the humidity of the gas breathed by the human body.

In addition, the breathing simulator 110 in this embodiment includes an eccentric crank circle 112 and a cylinder 114 for the simulation of the human breathing state. The eccentric crank circle 112 drives the stroke of the cylinder 114 to allow the amount of exhalation simulating the breathing of the human body to exhibit a sine wave change with respect to time.

2A is a schematic diagram of the breathing simulator 110 of FIG. 1; FIG. 2B is a diagram showing the relationship between the simulated human respiratory gas phase and the time generated by the breathing simulator 110, and the amount of exhalation is presented with respect to time. The sine wave changes. Referring to FIG. 2A to FIG. 2B, in the present embodiment, the eccentric crank circle 112 is connected to a driving motor (not shown) by means of its eccentric point C, and the motor drives the eccentric crank circle 112 to rotate, as shown in FIG. 2A. In Figure 2A The case where the eccentric crank circle 112 rotates with time is indicated by a broken line. As can be seen from FIG. 2A, as the eccentric crank circle 112 rotates, the eccentric point C is sequentially in the right half, the upper half, the left half, and the lower half of the eccentric crank circle 112, and is repeated. That is, the eccentric crank circle 112 of the present embodiment is rotated in the counterclockwise direction, but the present invention is not limited thereto. In other embodiments, the eccentric crank circle 112 can also be rotated in a clockwise direction.

As can be seen from the above-described manner of rotation, the eccentric crank circle 112 of the present embodiment does not rotate about its center as in the conventional crank circle, but rotates in the manner shown in Fig. 2A with reference to its eccentric point C. In other words, in the exemplary embodiment of the present invention, the so-called eccentric crank circle means that it does not rotate its center when it rotates, but rotates with reference to other points on the crank circle other than the center of the circle. Further, the rotating eccentric crank circle 112 drives the stroke of the cylinder 114 to cause the exhalation amount of the simulated human breathing gas to exhibit a sine wave variation with respect to time, as shown in FIG. 2B. This simulated human breathing gas, which exhibits a sinusoidal change, is closer to changes in human breathing gas than conventional techniques.

On the other hand, in the present embodiment, the respiratory mask measuring device 100 further includes a rotating table 160 and a support frame 170. The standard human head 130 is placed on a rotating table 160 of the support frame 170, which can provide a variety of test actions of the standard human head 130 to simulate real use. These test actions include standing still, swinging left and right, swinging up and down, tilting forward, leaning backwards, tilting to the left, and tilting to the right, which is a possible swinging motion of other users when using the breathing mask. In this embodiment, the respiratory mask 200 to be tested worn by the standard human head 130 may be a different type of respiratory protection device. Such as filter-type respiratory protection, powered air filtration respiratory protection, gas cylinder breathing protection and air supply breathing protection.

3 is a flow chart of a method for measuring a respiratory mask according to an embodiment of the present invention. In the present embodiment, the measurement method of the respiratory mask is suitable, for example, for the respiratory mask measuring device 100 of the embodiment of FIG. Referring to FIG. 1 and FIG. 3, the method for measuring the respiratory mask of the present embodiment includes wearing a respiratory mask 200 to be tested on a standard human head 130 (S100), and then driving the stroke of the cylinder 114 by using the eccentric crank circle 112. To generate a simulated human breathing gas to the standard human head 130 (S110), and then to detect the tightness of the respiratory mask 200 (S120).

The method of measuring the respiratory mask of the present embodiment will be described in more detail below. To test the respiratory mask 200 tightness, it simulates the action of the human body when using the mask, so the standard human head 130 will be placed on the rotating table 160, and the rotating table 160 can make the standard human head perform some specific actions or posture. For example, the standard human head 130 is, for example, adjusted to stand still, shake the head left and right, point up and down, lean forward, lean backward, and tilt to the right or other actions, thus simulating the real situation to achieve effective detection. After the respiratory mask 200 to be tested is worn on the standard human head 130, a simulated human breathing gas is supplied to the standard human head 130 to test the respiratory mask 200 tightness. In the present embodiment, the human body breathing gas is simulated as an important part, and the embodiment uses the eccentric crank circle 112 to drive the stroke of the cylinder 114 to generate a breathing gas simulating the real human body, that is, the amount of exhaled air is relatively The sine wave changes appear in time.

In this embodiment, when the simulated human breathing gas is initially provided, the breathing simulation condition can be set first, and the volume is adjusted according to the size and the range of the cylinder 114. The volume of the respirator and the number of cycles. For example, the breathing simulation system of the present embodiment can be set to 30 liters per minute and cycled 25 times, and different settings are made according to different test standards. With continued reference to FIG. 3 and in conjunction with FIG. 1, in the present embodiment, after the respiratory mask 200 to be tested is mounted on the standard human head 130 and the simulated human breathing gas is supplied to the standard human head 130, the system can be operated for a period of time as a whole. The concentration of particles in the respiratory mask 200 and in the environment is then detected using the leak detector 120 of FIG. 1 to calculate the tightness coefficient of the respiratory mask 200. Among them, the particle concentration can be background particles in the environment, or self-added particles, which are essentially determined by the standard of the detector.

In addition, the breathing mask measurement method of the embodiment of the present invention can obtain sufficient teaching, suggestion and implementation description from the description of the embodiment of FIG. 1 to FIG. 2B, and therefore will not be described again.

In summary, in an exemplary embodiment of the present invention, the breathing simulator utilizes an eccentric crank circle to drive the stroke of the cylinder, thereby generating an expiratory volume that exhibits a sine wave variation with respect to time, thereby achieving a breathing curve that is close to the real human body. In addition, the standard human head is used for the breath mask tightness test, and the rotary table is designed to allow the standard human head to rotate and various test positions, and can be tested according to standard human heads in different regions, so that objective tests can be obtained. result.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Measurement device for breathing mask

110‧‧‧ breathing simulator

112‧‧‧Eccentric crank circle

114‧‧‧ cylinder

120‧‧‧Leak detector

130‧‧‧Standard head

140‧‧‧Saturation

152‧‧‧Switching valve

154a‧‧‧Exhalation channel

154b‧‧‧ Inhalation channel

160‧‧‧Rotating table

170‧‧‧Support frame

180‧‧‧Filter

200‧‧‧ breathing mask

Steps for S100, S110, S120‧‧ ‧ breathing mask measurement methods

C‧‧‧eccentric point

1 is a schematic view of a measuring device for a respiratory mask according to an embodiment of the present invention.

2A is a schematic diagram of the breathing simulator 110 of FIG. 1.

FIG. 2B is a graph showing the relationship between the simulated human respiratory gas phase and the time generated by the breathing simulator 110.

3 is a flow chart of a method for measuring a respiratory mask according to an embodiment of the present invention.

100‧‧‧Measurement device for breathing mask

110‧‧‧ breathing simulator

112‧‧‧Eccentric crank circle

114‧‧‧ cylinder

120‧‧‧Leak detector

130‧‧‧Standard head

140‧‧‧Saturation

152‧‧‧Switching valve

154a‧‧‧Exhalation channel

154b‧‧‧ Inhalation channel

160‧‧‧Rotating table

170‧‧‧Support frame

180‧‧‧Filter

200‧‧‧ breathing mask

Claims (14)

A breathing mask measuring device comprising: a standard human head, wearing a breathing mask to be tested, a breathing simulator, providing a simulated human breathing gas to the standard human head; and a leak detector, and the breathing The interior of the mask communicates to detect the tightness of the breathing mask, wherein the breathing simulator includes an eccentric crank circle and a cylinder, and the eccentric crank circle drives the stroke of the cylinder, and the cylinder accordingly generates simulated human breathing gas to the standard Human head. The measuring device according to claim 1, wherein the simulated expiratory volume of the human breathing gas exhibits a sine wave variation with respect to time. The measuring device according to claim 1, further comprising: a rotating table carrying the standard human head and rotating to provide a plurality of testing actions of the standard human head. The measuring device of claim 3, further comprising: a support frame supporting the rotary table. The measuring device according to claim 3, wherein the testing actions include the standard human head being stationary, swinging left and right, swinging up and down, tilting forward, tilting backward, tilting to the left, and tilting to the right. The measuring device of claim 1, further comprising: an exhalation channel connecting the standard human head and the breathing simulator, wherein the simulated human breathing state flows into the standard human head through the exhalation channel; An intake passage connecting the standard human head with the breathing simulator, the mold The human body breathing gas flows out of the standard human head through the inhalation passage; and a switching valve is connected to the exhalation channel, the inhalation channel and the breathing simulator, and the frequency of the simulated human breathing gas is matched to control the exhalation channel And the inhalation channel is conductive or non-conductive. The measuring device of claim 1, wherein the exhalation channel comprises: a filter that filters impurities in the simulated human breathing gas flowing into the standard human head; and a saturator to adjust the simulated human body Breathing moisture. The measuring device of claim 1, wherein the breathing mask is selected from one of the following respiratory protection devices: a filtered respiratory protection device, a powered air filtration respiratory protection device, and a gas cylinder respiratory protection device. And air supply breathing protection. A method for measuring a breathing mask, which is suitable for a measuring device of a breathing mask, the measuring method comprising: wearing a breathing mask to be tested on a standard human head; and driving the movement of a cylinder by using an eccentric crank circle, To generate a simulated human breathing gas to the standard human head; and to detect the tightness of the respiratory mask by using a leak detector, wherein the leak detector is in communication with the interior of the breathing mask. The measuring method according to claim 9, wherein the simulated expiratory volume of the human breathing gas exhibits a sine wave variation with respect to time. The measuring method according to claim 9 of the patent application, further comprising: carrying the standard human head by using a rotating table; The rotary table is rotated to provide a variety of test actions for the standard human head. The measuring method according to claim 11, wherein the testing actions include the standard human head being stationary, swinging left and right, swinging up and down, tilting forward, tilting backward, tilting to the left, and tilting to the right. The measuring method of claim 9, further comprising: filtering impurities in the simulated human breathing gas flowing into the standard human head; and adjusting moisture in the simulated human breathing gas flowing into the standard human head. . The measuring method of claim 9, wherein the breathing mask is selected from one of the following respiratory protection devices: a filtered respiratory protection device, a powered air filtration respiratory protection device, and a gas cylinder respiratory protection device. And air supply breathing protection.