CN217015110U - Respirator capable of monitoring and indicating service life of filter element - Google Patents
Respirator capable of monitoring and indicating service life of filter element Download PDFInfo
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- CN217015110U CN217015110U CN202220140099.5U CN202220140099U CN217015110U CN 217015110 U CN217015110 U CN 217015110U CN 202220140099 U CN202220140099 U CN 202220140099U CN 217015110 U CN217015110 U CN 217015110U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 13
- 239000002574 poison Substances 0.000 claims description 11
- 231100000614 poison Toxicity 0.000 claims description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 239000007784 solid electrolyte Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 239000000356 contaminant Substances 0.000 description 5
- 230000029058 respiratory gaseous exchange Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000002341 toxic gas Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000003053 toxin Substances 0.000 description 3
- 231100000765 toxin Toxicity 0.000 description 3
- 230000002155 anti-virotic effect Effects 0.000 description 2
- 230000002612 cardiopulmonary effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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Abstract
A respirator that can monitor and indicate the useful life of a filter element, comprising: a mask body, a headband, and at least one filter cartridge that monitors and indicates the useful life of a filter element, the filter cartridge comprising a filter cartridge base, a monitoring and indicating moduleA filter element and a filter box cover. Wherein, the monitoring and indicating module can monitor the air pressure, VOC and Cl in real time2、H2S、SO2、HCl、NH3And the concentration of one or more gases in NO, and light and vibration alarm is carried out when relevant parameters exceed set thresholds, so that the filter element is indicated to reach the service life, and a user is reminded to replace the new filter element in time. In the respirator, the monitoring and indicating module is arranged on the filter cartridge base and can be repeatedly used together with the filter cartridge base, and a user only needs to replace the filter element with the expired service life, so that the service life of the filter element can be indicated in real time, and the use cost of protective articles can be reduced.
Description
Technical Field
The present invention relates to a respirator, and in particular to a respirator that can monitor and indicate the useful life of a filter element.
Background
Many work environments may expose workers to contaminated air. In a corresponding work environment, a worker may use a respirator (breathing protective equipment) to help reduce exposure risks. Often, the user is unable to ascertain the current performance and status of the respirator and if the spent canister is not replaced in time, there may be physical harm caused by prolonged inhalation of toxic and harmful gases/vapors that exceed the limits. Users who use the particle-resistant filter/dirt tray, if they do not change the filter/dirt tray with excessive resistance in time, may also be fatigued or impaired by cardiopulmonary function due to wearing a respirator with excessive resistance for a long time. Therefore, timely replacement of respirator canisters and cotton/dust filters is very important to the safety and health of the personnel.
It is also critical for the work unit to develop a reasonable replacement plan for the respirator canister. Typically, prior to planning a respirator canister replacement, a sampling analysis of potentially toxic and harmful gas or vapor contaminants at the workplace is required to determine the average concentration level in the air. After the contaminants and their concentrations are clarified, the canister replacement cycle is determined according to the service life estimation software of the respirator manufacturer. However, the actual contaminant level in the workplace is not stable and constant, the actual contact time is difficult to determine, and the performance of the poison filtering box is also affected by environmental conditions such as temperature and humidity. The replacement cycle of the canister estimated by experience or software is difficult to reflect the service life of the canister really and effectively, and is difficult to ensure that the canister is replaced when the service life reaches.
Therefore, in order to monitor the Service Life of the canister and remind the user to replace the canister in time, it is very important to introduce an End-of-Service-Life Indicator (ESLI) into the respirator. ESLI is divided into two broad categories, passive and active. A typical passive ESLI is a colorimetric type failure indicator. Coating a chemical indicator on test paper or a film, and then placing the test paper or the film on the inner side of a transparent window on the side wall of a toxin filtering box; when the adsorption layer of the poison filtering box is close to saturation or is penetrated by pollutants, the chemical indicator reacts with the pollutants to obviously change the color of the test paper or the film, and a user can timely replace the poison filtering box after observing the test paper or the film through the transparent window. Passive ESLI is less operable: 1) the observation is not easy to be carried out in a workplace with dark light; 2) the user is required to observe at any time, but the observation cannot be directly performed from the visual angle of the user, so that the concentration degree and the working efficiency of the user are interfered; 3) the available types are very few and can only meet the requirements of part of workplaces.
Active ESLI utilizes a sensor to monitor the presence of contaminants and prompts the user to replace the canister when the canister adsorbent layer is nearly saturated or penetrated by the contaminants. Active ESLI is generally classified into 3 types: 1) the sensor and the warning device are arranged in the full-face respirator mask, and the full-face respirator mask has the defects that the breathing space of a user is occupied, and the full-face respirator mask cannot be used in a half-face respirator; 2) the sensor is arranged in the toxin filtering box and is externally connected with a monitoring and warning device, so that wearing and operation are influenced; 3) the sensor and the warning device are arranged in the toxin filtering box, are usually used for emergency response occasions, are disposable, have extremely high cost and are not suitable for application in industrial places.
Respirators require the use of a particulate-protective filter cotton or dust box in locations where it is desirable to reduce the risk of particulate exposure. However, as the time of use of the cotton/dust filter cartridge increases, the accumulation of particulate matter will greatly increase the resistance of the cotton/dust filter cartridge, thereby increasing the difficulty of inhalation by the user. In fact, the employment unit often does not have a clear filter-changing condition and schedule, but simply determines whether the filter needs to be changed or not through the user's experience, or forcibly limits the replacement cycle, with the result that the filter may be wasted due to frequent filter changes, or the filter/dust box may not be changed for a long time, causing excessive load to the user or damage to his cardiopulmonary function.
Disclosure of Invention
To address the above problems, the present invention provides a respirator that includes a monitoring and indicator module, an active ESLI. The monitoring and indicating module can monitor VOC and Cl at the rear end of the filter element in real time2、H2S、SO2、HCl、NH3And the concentration of one or more gases in NO, and the air pressure at the rear end of the filter element can be monitored in real time, so that the service life of the anti-virus filter element can be indicated, and the service life of the anti-particulate filter cotton or the dust filter box can be indicated according to the air pressure difference at the rear end of the filter element during breathing. In the respirator, the monitoring and indicating module is arranged on the filter cartridge base and can be repeatedly used together with the filter cartridge base, and a user only needs to replace a filter element with the expired service life, so that the service life of the filter element can be indicated in real time, and the use cost of protective articles can be reduced.
The utility model discloses a respirator capable of monitoring and indicating the service life of a filter element, which comprises: a mask body, a headband, and at least one filter cartridge that monitors and indicates the useful life of the filter element; the mask body is a self-absorption filter type close fit respirator mask body; the filter cartridge includes a cartridge base, a monitoring and indicating module, a filter element, and a cartridge cover.
The mask body can be a half mask body or a full mask body.
One side of the filter box base is provided with an interface connected with the mask body, and the other side of the filter box base is provided with a cavity for installing the monitoring and indicating module and the filter element and connecting the filter box cover.
The air pressure sensor in the monitoring and indicating module can monitor the air pressure filtered by the filtering element in real time, and is used for monitoring the resistance of the filtering element during breathing and calculating the wearing time of the respirator.
The monitoring and indicating module, wherein the gas sensor is one or two of a solid electrolyte electrochemical sensor and a low-power consumption MEMS metal oxide semiconductor sensor, and can monitor VOC and Cl filtered by the filtering element in real time2、H2S、SO2、HCl、NH3And the concentration of one or more toxic gases in NO.
And the monitoring and indicating module is characterized in that a micro-motion light touch switch or a film pressure sensor can sense whether the filter cartridge is provided with the filter element or not.
The monitoring and indicating module and the wireless transmission module can transmit the filtered toxic gas concentration, the resistance of the filter element, the wearing time of the respirator, the accumulated use time of the filter element and other parameters to a corresponding terminal or a monitoring platform.
The monitoring and indicating module, wherein the indicator comprises one or two of an LED and a micro vibration motor, can provide light and vibration alarm signals, and can also indicate the working state and the residual capacity.
The filter element can be a particle-proof or poison-proof filter element, and can also be a combination of the particle-proof and poison-proof filter elements.
The filter box cover can be an independent fixing fastener or a fixing fastener integrated on the filter element.
Drawings
FIG. 1 is a schematic view of the construction of the respirator of the present invention.
FIG. 2 is a schematic view of a filter cartridge of the respirator of the present invention.
FIG. 3 is a schematic view of the construction of the filter cartridge of the respirator of the present invention.
Fig. 4 is a schematic diagram of the air pressure sensor monitoring the resistance of the filter element and calculating the wear time in the present invention.
FIG. 5 is a schematic view of a gas sensor monitoring canister life failure indication in accordance with the present invention.
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments.
A respirator (shown in fig. 1) that can monitor and indicate the useful life of a filter element, comprising: a mask body, headgear, and at least one filter cartridge that monitors and indicates the useful life of the filter element.
The respirator mask body is a self-suction filter type closed respirator mask body, which can be a half-face mask body or a full-face mask body.
FIG. 2 is a schematic view of a filter cartridge of the respirator of the present invention. One end of the filter box is a port 21 connected with the mask body, two sides of the filter box are respectively provided with 1 LED indicator window 22, and the other side surface of the filter box is provided with a sealable power supply and data transmission port 23.
The cartridge structure described in the respirator of the present invention (as shown in fig. 3) is suitable for use in a cartridge or canister. The monitoring and indicator module 32 is placed in the cartridge base 31, behind the filter element 33. The filter element 33, which is a replaceable element, is fastened and sealed perimetrically in the cartridge base 31 by the cartridge cover 34 before the monitoring and indicator module 32. The filter element 33 may be a poison or particulate filter element or a combination of poison and particulate filter elements.
The monitoring and indication module 32 is a circuit module with monitoring and indication functions, and includes: the system comprises a built-in rechargeable battery, a data acquisition and processing unit, a power supply and data transmission port, an air pressure sensor, one or more solid electrolyte electrochemical sensors or low-power consumption MEMS metal oxide sensors, a micro-touch switch or a film pressure sensor, a wireless transmission module, an LED indicator, a micro-vibration motor and other auxiliary components.
The air pressure sensor in the monitoring and indication module 32 may monitor the air pressure filtered by the filter element in real time for monitoring the resistance of the filter element during breathing and calculating the wear time of the respirator. The gas sensor is one or two of a solid electrolyte electrochemical sensor and a low-power-consumption MEMS metal oxide semiconductor sensor, and can monitor VOC and Cl filtered by the filtering element in real time2、H2S、SO2、HCl、NH3And the concentration of one or more toxic gases in NO. The micro-motion tact switch or the film pressure sensor can sense whether the filter cartridge is provided with the filter element or not. The wireless transmission module can transmit the filtered toxic gas concentration, the resistance of the filter element, the wearing time of the respirator, the accumulated use time of the filter element and other parameters to a corresponding terminal or a monitoring platform. The LED indicator and the micro vibration motor can provide light and vibration alarm signals and can also indicate the working state and the residual electric quantity.
The specific manner in which the respirator can monitor and indicate the useful life of the filter element is as follows:
as shown in FIG. 4, the air pressure sensor reading is stable before the respirator is worn by the user; when the user wears the respirator and starts to inhale, the air pressure sensor monitors that the air pressure at the rear end of the filter element starts to change greatly periodically, and the time is recorded as the wearing time Ts of the respirator. After the user takes off the respirator, the reading of the air pressure sensor tends to be stable, and the reading is recorded as the moment Te when the respirator stops wearing. Recording the actual time of the use by the respirator: Te-Ts and record the cumulative time of use of the filter element.
Because the inhalation valve of the respirator is a one-way valve, the inhalation valve is closed when a user exhales, and the air pressure at the rear end of the filter element can be restored to the atmospheric pressure value; and when the air suction valve is opened during air suction, the front end and the rear end of the air suction valve generate pressure drop due to the resistance of the filter element. The peak-to-valley difference Δ P of the barometric pressure reading is the maximum resistance of the filter element in use. When Δ P reaches or exceeds a preset resistance threshold, the user will perceive a visible light or vibration warning signal provided by the respirator; meanwhile, the respirator can also transmit related data and alarm signals to a corresponding terminal or a monitoring platform.
The anti-poison filter element with the effective period can completely remove the target gas or reduce the concentration of the target gas to an extremely low value C0 (as shown in figure 5) when in use so as to protect the health and the safety of a user. Along with the increase of the service time, the capacity of the anti-poison filter element for adsorbing and filtering the poisonous and harmful gas is gradually reduced, and the concentration of the poisonous and harmful gas penetrating through the anti-poison filter element is obviously increased at the stage close to the service life of the anti-poison filter element. When the penetration concentration is more than or equal to a preset concentration threshold value Ca, a user can sense visible light or a vibration alarm signal provided by the respirator; meanwhile, the respirator can also transmit relevant data including the service life Ta of the anti-virus filter element and an alarm signal to a corresponding terminal or a monitoring platform.
In the absence of a wireless terminal or platform, the administrator or respirator user can export relevant data through the power and data transfer port 23 of the cartridge for recording and analysis.
The above-mentioned embodiments are merely preferred technical solutions of the present invention, and should not be construed as limiting the present invention. The embodiments and features thereof in the present application may be arbitrarily combined with each other without conflict. The technical scope of the utility model is defined by the claims, and equivalents and modifications equivalent to the technical features of the technical claims are also within the scope of the utility model.
Claims (9)
1. A respirator that monitors and indicates the useful life of a filter element, comprising a self-priming, filtering, close-fitting respirator mask body, a headband, and at least one filter cartridge that monitors and indicates the useful life of a filter element, wherein: the cartridge includes a cartridge base, a monitoring and indicator module, a filter element, and a cartridge cover.
2. The respirator of claim 1, wherein the respirator is configured to monitor and indicate the useful life of the filter element, and further configured to: the respirator mask body can be a half-face mask body or a full-face mask body.
3. The respirator of claim 1, wherein the filter element has a useful life that is monitorable and indicative of: one side of the filter box base is provided with an interface connected with the mask body, and the other side of the filter box base is provided with a cavity for installing a monitoring and indicating module and a filter element and connecting with the filter box cover.
4. The respirator of claim 1, wherein the respirator is configured to monitor and indicate the useful life of the filter element, and further configured to: the monitoring and indicating module comprises an air pressure sensor, and can monitor the air pressure passing through the rear end of the filter element in real time and is used for calculating the resistance of the filter element and the wearing time of the respirator.
5. The respirator of claim 1, wherein the respirator is configured to monitor and indicate the useful life of the filter element, and further configured to: the monitoring and indicating module at least comprises a solid electrolyte electrochemical sensor and a low-power consumption MEMS metal oxide semiconductorThe gas sensor in the body sensor can monitor VOC and Cl filtered by the filtering element in real time2、H2S、SO2、HCl、NH3And concentration of one or more gases in NO.
6. The respirator of claim 1, wherein the respirator is configured to monitor and indicate the useful life of the filter element, and further configured to: the monitoring and indicating module comprises a micro-motion light touch switch or a film pressure sensor and can sense whether the filter cartridge is provided with a filter element or not.
7. The respirator of claim 1, wherein the filter element has a useful life that is monitorable and indicative of: the monitoring and indicating module comprises one or two of an LED and a micro vibration motor, can provide light and vibration alarm signals, and can also indicate the working state and the residual electric quantity.
8. The respirator of claim 1, wherein the respirator is configured to monitor and indicate the useful life of the filter element, and further configured to: the filter element may be a particulate or poison proof filter element or a combination of particulate and poison proof filter elements.
9. The respirator of claim 1, wherein the filter element has a useful life that is monitorable and indicative of: the filter box cover can be an independent fixing fastener or a fixing fastener integrated on the filter element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220140099.5U CN217015110U (en) | 2022-01-19 | 2022-01-19 | Respirator capable of monitoring and indicating service life of filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220140099.5U CN217015110U (en) | 2022-01-19 | 2022-01-19 | Respirator capable of monitoring and indicating service life of filter element |
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| Publication Number | Publication Date |
|---|---|
| CN217015110U true CN217015110U (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220140099.5U Active CN217015110U (en) | 2022-01-19 | 2022-01-19 | Respirator capable of monitoring and indicating service life of filter element |
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| Country | Link |
|---|---|
| CN (1) | CN217015110U (en) |
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Effective date of registration: 20240725 Address after: 301A, Building 1, No. 168 Xutang Road, Songjiang District, Shanghai, 201613 Patentee after: SHANGHAI HUYOU ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Country or region after: China Address before: 541399 No.42 Xinggui Road, Xing'an Town, Xing'an County, Guilin City, Guangxi Zhuang Autonomous Region Patentee before: Jiang Xiali Country or region before: China |