Protective effect test detection system for respiratory protective articles

Abstract

The utility model provides a protection effect test detection system for respiratory protection articles. The protection effect test detection system comprises a sealed cabin; the material generator comprises a dust generator, an organic solvent generator and a concentration controller; the temperature control device comprises a heater, a refrigerating system and a temperature sensor; the humidity control device comprises a humidifier and a dehumidifier; the human breathing simulating device comprises human lung simulating equipment, breathing simulating temperature control equipment and breathing simulating humidity control equipment; the ventilation and purification device comprises an air draft pipeline, an air exhaust pipeline and air purification equipment; air purification equipment is arranged on the air exhaust pipeline; and the detection device comprises two particulate matter counters. The protection effect test detection system for the respiratory protection articles is used for simulating the protection effect and influence factors of the respiratory protection articles in a working environment in a sealed cabin.

Description

Technical Field

[0001] This utility model relates to the field of testing system technology, and in particular to a testing system for the protective effect of respiratory protective equipment. Background Technology

[0002] Silica dust is one of the most serious occupational hazards in my country, and pneumoconiosis currently ranks first among newly reported occupational diseases annually. As of 2022, occupational pneumoconiosis still accounted for 68% of reported occupational diseases. The main hazard of pneumoconiosis for workers is free silica in the dust. Organic solvents are widely used in coatings, adhesives, paints, and cleaning agents. In recent years, with the widespread use of organic solvents, the detection rate of organic solvents in enterprises has been high, and acute and chronic poisoning among groups has occurred frequently, especially benzene and n-hexane poisoning. Therefore, wearing personal protective equipment, i.e., respiratory protective equipment, remains an important way to protect the health and safety of workers. However, there is limited research on the protective effect of respiratory protective equipment, which still cannot guide enterprises and workers exposed to it to scientifically implement respiratory protection measures. Respiratory protective equipment includes dust masks and gas masks. How to design a system to simulate the working environment in the laboratory to test the protective effect of respiratory protective equipment is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the technical problem solved by this utility model is to provide a respiratory protective equipment protective effect testing system that can simulate the working environment in the laboratory to test the protective effect of respiratory protective equipment.

[0004] To achieve the above and other related objectives, this utility model provides a respiratory protective equipment protective effect testing system, comprising:

[0005] Sealed compartment;

[0006] A material generator includes a dust generator, an organic solvent generator, and a concentration controller; the concentration controller is connected to the dust generator and the organic solvent generator; the concentration controller is used to control the concentration of dust released by the dust generator and the concentration controller is used to control the concentration of organic solvent released by the organic solvent generator.

[0007] The temperature control device includes: a heater, a refrigeration system, and a temperature sensor; the heater, the refrigeration system, and the temperature sensor are all connected to the main controller; the temperature sensor is located inside the sealed chamber.

[0008] A humidity control device includes a humidifier and a dehumidifier; both the humidifier and the dehumidifier are connected to the main controller.

[0009] A humanoid breathing device includes: a standard human head model, a humanoid lung device, a simulated breathing temperature control device, and a simulated breathing humidity control device; the standard human head model is equipped with the humanoid lung device; the humanoid lung device can simulate the human circulatory respiratory flow, the humidity generated by human respiration, and the temperature generated by human respiration; the simulated breathing temperature control device is used to control the temperature generated by the simulated human respiration by the humanoid lung device, and the simulated breathing humidity control device is used to control the humidity generated by the simulated human respiration by the humanoid lung device; respiratory protective equipment can be worn on the standard human head model;

[0010] A ventilation and purification device includes: an exhaust duct, an air exhaust duct, and an air purification device; one end of the exhaust duct is connected to the interior of the sealed chamber, the other end of the exhaust duct is connected to one end of the air exhaust duct, and the other end of the air exhaust duct is connected to the exterior of the sealed chamber; the air purification device is installed on the air exhaust duct.

[0011] The detection device includes two particulate counters, which are used to detect the particle size concentration data inside and outside the respiratory protective equipment, respectively.

[0012] The display, detection device, dust generator, organic solvent generator, concentration controller, human lung device, simulated breathing temperature control device, and simulated breathing humidity control device are all connected to the main controller.

[0013] Preferably, one of the particulate counters is connected to the interior of the respiratory protective equipment via an internal pipe, and the other particulate counter is connected to one end of an external pipe of the protective equipment, the other end of which is located on the outside of the respiratory protective equipment.

[0014] Preferably, the sealed chamber is provided with an openable and closable sealed door.

[0015] Preferably, the heater is a nickel-chromium alloy electric heater.

[0016] Preferably, the refrigeration system is an air-cooled compressor refrigeration system.

[0017] As described above, the respiratory protective equipment protective effect testing system of this utility model has the following beneficial effects:

[0018] This utility model discloses a respiratory protective equipment protective effect testing system, which is used to test the protective effect of respiratory protective equipment and its influencing factors in a sealed chamber simulating the working environment. It explores the effects of the concentration of the material released by the material generator, the ambient temperature, the ambient humidity, the breathing flow rate, the loading amount of the material released by the material generator, the wearing time of the respiratory protective equipment, and the type of respiratory protective equipment on the filtration efficiency and breathing resistance of the respiratory protective equipment. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the respiratory protective equipment protective effect testing system of this embodiment.

[0020] Figure 2 This is a three-dimensional structural diagram of the respiratory protective equipment worn on the humanoid breathing device of the respiratory protective equipment protection effect testing system of this embodiment.

[0021] Figure 3 This is a schematic diagram of the respiratory protective equipment protective effect testing system under the control of the main controller in this embodiment.

[0022] Explanation of icon numbers

[0023] 1. Respiratory protective equipment

[0024] 100 Sealed Chambers

[0025] 110 Sealed door

[0026] 200 Material Generator

[0027] 210 Dust Generator

[0028] 220 Organic Solvent Generator

[0029] 230 Concentration Controller

[0030] 300 Temperature Control Device

[0031] 310 heater

[0032] 320 Refrigeration System

[0033] 330 Temperature Sensor

[0034] 400 Main Controller

[0035] 500 Humidity Control Device

[0036] 510 Humidifier

[0037] 520 Dehumidifier

[0038] 600 Humanoid Breathing Device

[0039] 610 Types of human lung equipment

[0040] 620 Breathing-Simulated Temperature Control Device

[0041] 630 Breath-Simulating Humidity Control Device

[0042] 710 Internal piping of protective equipment

[0043] 720 External piping for protective equipment

[0044] 730 Exhaust and recirculation device

[0045] 740 Exhaust Duct

[0046] 750 Air exhaust duct

[0047] 760 Air Purification Equipment

[0048] 800 Detection Device Detailed Implementation

[0049] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0050] Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0051] like Figures 1 to 3 As shown, the respiratory protective equipment protective effect testing system of this embodiment includes:

[0052] Sealed chamber 100;

[0053] The material generator 200 includes a dust generator 210, an organic solvent generator 220, and a concentration controller 230. The concentration controller 230 is connected to the dust generator 210 and the organic solvent generator 220. The concentration controller 230 controls the concentration of dust released by the dust generator 210 and the concentration controller 230 controls the concentration of organic solvent released by the organic solvent generator 220. The dust generator 210 and the organic solvent generator 220 can spray particulate matter into the sealed chamber 100 at a stable flow rate, and the concentration controller 230 allows the concentration of the released particulate matter to be adjusted.

[0054] Temperature control device 300 includes: heater 310, refrigeration system 320 and temperature sensor 330; heater 310, refrigeration system 320 and temperature sensor 330 are all connected to main controller 400; temperature sensor 330 is disposed inside sealed chamber 100; temperature sensor 330 transmits the actual temperature inside sealed chamber 100 to main controller 400, main controller 400 compares the actual temperature with a preset temperature to control heater 310 and refrigeration system 320 so that the inside of sealed chamber 100 reaches the preset temperature;

[0055] Humidity control device 500 includes a humidifier 510 and a dehumidifier 520; both the humidifier 510 and the dehumidifier 520 are connected to the main controller 400; the main controller 400 controls the humidifier 510 and the dehumidifier 520 to achieve the preset humidity inside the sealed chamber 100; the humidifier 510 can be a shallow-dish evaporative humidifier, and the dehumidifier 520 can be a compressor bypass cooling dehumidification method.

[0056] The humanoid breathing device 600 includes: a standard human head model 601, a humanoid lung device 610, a simulated breathing temperature control device 620, and a simulated breathing humidity control device 630; the standard human head model 601 is equipped with the humanoid lung device 610; the humanoid lung device 610 can simulate the human body's circulatory breathing flow rate, the humidity generated by human respiration, and the temperature generated by human respiration; the simulated breathing temperature control device 620 is used to control the temperature generated by the simulated human respiration by the humanoid lung device 610, and the simulated breathing humidity control device 630 is used to control the humidity generated by the simulated human respiration by the humanoid lung device 610; respiratory protective equipment 1 can be worn on the standard human head model 601; the human body's circulatory breathing flow rate is a sinusoidal circulatory breathing flow rate; after the humanoid lung device 610 inhales gas, the gas is used for respiration through the humanoid lung device 610, and the exhaled gas is discharged from the mouth and nose of the standard human head model 601.

[0057] The ventilation and purification device includes: an exhaust duct 740, an air exhaust duct 750, and an air purification device 760; one end of the exhaust duct 740 is connected to the interior of the sealed chamber 100, the other end of the exhaust duct 740 is connected to one end of the air exhaust duct 750, and the other end of the air exhaust duct 750 is connected to the exterior of the sealed chamber 100; the air exhaust duct 750 is equipped with the air purification device 760.

[0058] Regarding the ventilation and purification device, dust or organic solvents inside the sealed chamber 100 can be discharged from the sealed chamber 100 through the exhaust duct 740 and the air exhaust duct 750. The ventilation and purification device can maintain the stability of the particulate matter concentration inside the sealed chamber 100 and ensure the safety of the discharged gas after purification.

[0059] The detection device 800 includes two particulate counters, which are used to detect the particle size concentration data inside and outside the respiratory protective equipment 1, respectively. In this embodiment, the particulate counters are used to detect five types of particle size concentration data inside and outside the respiratory protective equipment 1.

[0060] The display, detection device 800, dust generator 210, organic solvent generator 220, concentration controller 230, human lung device 610, simulated breathing temperature control device 620, and simulated breathing humidity control device 630 are all connected to the main controller 400. The main controller 400 can control the operation of the dust generator 210, organic solvent generator 220, concentration controller 230, human lung device 610, simulated breathing temperature control device 620, and simulated breathing humidity control device 630. The particulate matter counter acquires particle size concentration data and transmits it to the main controller 400, which then transmits the particle size concentration data to the display.

[0061] This invention relates to a respiratory protective equipment efficacy testing system. It is used to test the protective effect of respiratory protective equipment 1 in a sealed chamber 100 simulating a working environment, and to investigate the influencing factors. The system explores the effects of the concentration of material released by the material generator 200, ambient temperature, ambient humidity, breathing flow rate, the amount of material released by the material generator 200, the wearing time of the respiratory protective equipment 1, and the type of respiratory protective equipment 1 on the filtration efficiency and breathing resistance of the respiratory protective equipment 1. This respiratory protective equipment efficacy testing system can be used to replace the testing of self-priming filter-type protective masks in harmful situations.

[0062] To facilitate the detection of particle size concentration data inside and outside the respiratory protective equipment 1, one particulate counter is connected to the inside of the respiratory protective equipment 1 via an internal conduit 710, and another particulate counter is connected to one end of an external conduit 720, the other end of which is located outside the respiratory protective equipment 1. The other particulate counter monitors the actual particle size concentration outside the respiratory protective equipment 1 and transmits it to the main controller 400. The main controller 400 compares the actual particle size concentration with a preset particle concentration to control the dust generator 210, the organic solvent generator 220, and the ventilation and purification device, so that the internal particulate concentration of the sealed chamber 110 reaches the preset particle concentration.

[0063] The sealed chamber 110 is also equipped with an exhaust circulation device 730, which enables the gas in the sealed chamber 110 to circulate.

[0064] The sealed chamber 100 is equipped with an openable and closable sealed door 110. The external dimensions of the sealed chamber 100 are 3.5m in length, 3m in width, and 2.5m in height; the internal dimensions are 2m in length, 1m in width, and 2m in height. The sealed chamber 100 is constructed using thermal insulation and internal anti-corrosion materials, and is a corrosion-resistant, rust-proof, anti-static, high-temperature resistant, non-aging, and visible structure. The sealed chamber 100 is equipped with an openable and closable sealed door 110, allowing access to the interior of the sealed chamber 100 from one side. This sealed door 110 must be ensured to be sealed when closed.

[0065] In this embodiment, for ease of heating and cooling, the heater 310 is a nickel-chromium alloy electric heater 310. The cooling system 320 is an air-cooled compressor cooling system 320.

[0066] The respiratory protective equipment protection effectiveness testing system can perform the following two tests:

[0067] The first type is the dust mask protection effect test, which can study the effects of dust concentration, ambient temperature, ambient humidity, breathing flow rate, dust loading, and dust mask wearing time on the dust mask filtration efficiency and breathing resistance;

[0068] The second type is the test of the protective effect of gas masks, which can study the effects of organic solvent concentration, ambient temperature, ambient humidity, breathing flow rate, organic solvent loading, and gas mask wearing time on the filtration efficiency and breathing resistance of gas masks.

[0069] Operating procedures for the respiratory protective equipment protective efficacy testing system:

[0070] 1) One set of respiratory protective equipment is installed on the humanoid lung device 610;

[0071] 2) Turn on the dust generator 210, set the dust concentration required for the test, and wait for the dust concentration in the sealed chamber 100 to stabilize;

[0072] 3) Turn on the temperature control device 300 and humidity control device 500, set the temperature and humidity required for the test, and wait for the temperature and humidity inside the sealed chamber 100 to stabilize;

[0073] 4) Turn on the human lung device 610, the simulated breathing temperature control device 620 and the simulated breathing humidity control device 630, and keep the dust generator 210 in the on state;

[0074] 5) The particulate counter records parameters such as temperature, humidity, and particulate concentration inside and outside the respiratory protective equipment 1 in real time within the sealed chamber 100;

[0075] 6) Turn off the dust generator 210 and turn on the air purification equipment 760 to purify the gas in the sealed chamber 100;

[0076] 7) Export the data and shut down the system.

[0077] Current domestic and international research indicates that the properties of dust, ambient temperature, ambient humidity, usage time, respiratory flow rate, worker facial features, and the protective performance of the respiratory protective equipment (RPE) itself are all factors affecting its protective effect. However, most studies are limited to analyzing the impact of a single factor on the protective performance of the RPE. Furthermore, only some standards mention recommended usage time for the RPE, and there is still no clear conclusion regarding the optimal wearing time. Therefore, it is not possible to provide users with scientifically sound recommendations for selection, use, and replacement of the RPE. This invention, based on recreating a work environment, constructs a sealed chamber 100 for testing the protective effect of the RPE. This chamber can simulate dust and organic solvent contact environments, laying the foundation for establishing the influence of temperature, humidity, particulate matter, wearing time, and human respiration on the protective effect of the RPE. This will provide scientific guidance for enterprises and workers to implement effective respiratory protection measures and reduce the health hazards of dust and toxic substances to workers.

[0078] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A testing system for the protective effect of respiratory protective equipment, characterized in that, include: Sealed compartment (100); A material generator (200) includes a dust generator (210), an organic solvent generator (220), and a concentration controller (230); the concentration controller (230) is connected to the dust generator (210) and the organic solvent generator (220); the concentration controller (230) is used to control the concentration of dust released by the dust generator (210) and the concentration controller (230) is used to control the concentration of organic solvent released by the organic solvent generator (220); A temperature control device (300) includes a heater (310), a refrigeration system (320), and a temperature sensor (330); the heater (310), the refrigeration system (320), and the temperature sensor (330) are all connected to a main controller (400); the temperature sensor (330) is located inside the sealed chamber (100). A humidity control device (500) includes a humidifier (510) and a dehumidifier (520); both the humidifier (510) and the dehumidifier (520) are connected to the main controller (400); A humanoid breathing apparatus (600) includes: a standard human head model (601), a humanoid lung device (610), a humanoid breathing temperature control device (620), and a humanoid breathing humidity control device (630); the standard human head model (601) is equipped with the humanoid lung device (610); the humanoid lung device (610) can simulate the human circulatory breathing flow, the humidity generated by human breathing, and the temperature generated by human breathing; the humanoid breathing temperature control device (620) is used to control the temperature generated by human breathing simulated by the humanoid lung device (610), and the humanoid breathing humidity control device (630) is used to control the humidity generated by human breathing simulated by the humanoid lung device (610); respiratory protective equipment (1) can be worn on the standard human head model (601); The ventilation and purification device includes: an exhaust duct (740), an air exhaust duct (750), and an air purification device (760); one end of the exhaust duct (740) is connected to the interior of the sealed chamber (100), the other end of the exhaust duct (740) is connected to one end of the air exhaust duct (750), and the other end of the air exhaust duct (750) is connected to the exterior of the sealed chamber (100); the air purification device (760) is provided on the air exhaust duct (750); the detection device (800) includes two particulate counters, which are used to detect the particle size concentration data inside and outside the respiratory protective equipment (1), respectively. The display, detection device (800), dust generator (210), organic solvent generator (220), concentration controller (230), human lung device (610), breathing-inspired temperature control device (620) and breathing-inspired humidity control device (630) are all connected to the main controller (400).

2. The respiratory protective equipment protective effect testing system according to claim 1, characterized in that: One of the particulate counters is connected to the interior of the respiratory protective equipment (1) via an internal conduit (710) of the protective equipment, and the other particulate counter is connected to one end of an external conduit (720) of the protective equipment, the other end of which is located outside the respiratory protective equipment (1).

3. The respiratory protective equipment protective effect testing system according to claim 1, characterized in that: The sealed chamber (100) is equipped with an openable and closable sealed door (110).

4. The respiratory protective equipment protective effect testing system according to claim 1, characterized in that: The heater (310) is a nickel-chromium alloy electric heater.

5. The respiratory protective equipment protective effect testing system according to claim 1, characterized in that: The refrigeration system (320) is an air-cooled compressor refrigeration system.

Images