CN112859973A - Method and device for cooling and dehumidifying environment in protective clothing - Google Patents
Method and device for cooling and dehumidifying environment in protective clothing Download PDFInfo
- Publication number
- CN112859973A CN112859973A CN202110141371.1A CN202110141371A CN112859973A CN 112859973 A CN112859973 A CN 112859973A CN 202110141371 A CN202110141371 A CN 202110141371A CN 112859973 A CN112859973 A CN 112859973A
- Authority
- CN
- China
- Prior art keywords
- air
- protective clothing
- humidity
- cooling
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
Abstract
The invention provides a method and a device for cooling and dehumidifying the environment in protective clothing, wherein the device comprises a main control module, an air pump, a temperature sensor, a humidity sensor and a power supply; the main control module sets temperature and humidity thresholds, receives information of the temperature sensor and the humidity sensor, sends a control instruction, compares and judges the acquired temperature and humidity information with the thresholds, and sends the control instruction to the air pump according to the result; the air pump is connected with the air transmission pipeline, the air transmission pipeline is provided with an air inlet pipe and an air outlet pipe, dry air is input, and hot air in the protective clothing is discharged; the temperature sensor and the humidity sensor sense the temperature and the humidity of the internal environment of the protective clothing in real time. The invention can prevent damp and heat in the long-acting protective clothing, the damp and heat prevention and the eyepiece antifogging function can always run as long as the electric energy capacity allows, and after the arrangement, the invention can be repeatedly recycled in a single chip microcomputer automatic control mode, thereby providing more convenience for medical workers, industrial and mining enterprise personnel or other wearers.
Description
Technical Field
The invention relates to the technical field of protective articles, in particular to a method and a device for cooling and dehumidifying the environment in protective clothing.
Background
The protective clothing is an indispensable protective measure for medical health, factory and mine production and other special professional environment practitioners. For example, to combat new coronavirus, medical personnel struggling at the front line are all wearing protective clothing to avoid virus infection. In order to form a protective barrier, the manufactured protective clothing is made of materials with high air tightness, so that heat and sweat generated by the human body cannot be released to the environment, and the heat and the sweat cannot be left in a small space formed by the protective clothing and the human body. Along with the accumulation of time, the water vapor and the temperature in the small space continuously rise, so that a damp and hot and damp and stuffy environment is formed, and the wearer can feel bitter and tired, thereby causing great negative effects on the work of medical staff. From the perspective of epidemic control and care for medical care personnel, solving the problem of damp heat in protective clothing is an important issue.
On the other hand, in some conventional production or life, workers are often in a damp and hot environment, for example, mine workers work at the first line with higher temperature and higher humidity all the year round, the heat damage can cause adverse effects on human health, and if the microenvironment of life can be changed, the influence of the heat damage is avoided, so that the mine workers undoubtedly play an important role in occupational physiological health. From the angle, people working in a damp and hot environment wear protective clothing equipped with cooling and dehumidifying measures, which is undoubtedly a great improvement on the working environment. Therefore, the reasonable dehumidification and cooling method and device have important practical significance.
Generally, protective garments are equipped with corresponding goggles (or also called vision windows) for isolating the naked eye from the external environment, while ensuring airtightness. For medical protective eyepieces, it is an eyeshield device used for closing or protecting the periphery of the eye, mainly used to prevent particles, water, chemicals and infectious substances such as blood and body fluid from invading the eye. Wearing goggles is one of the important measures to directly prevent bloodborne occupational exposure and occupational infections. However, goggles can fog up in the long-time wearing process in the sealed space that protective clothing formed, seriously influence medical personnel's sight, increase the operation degree of difficulty, increase the pollution risk. Not only influences the accuracy of the operation of medical staff, but also increases the psychological pressure. Currently, there are several methods for antifogging treatment of lenses: (1) smearing the antifogging agent on the lens; (2) wiping the lens by using a detergent product; (3) smearing the lens with a hand-washing-free disinfectant; (4) the lens is smeared with the automobile glass water. These methods are temporary methods, and need to consider the antifogging of the ocular lens during the dehumidification and cooling process of the protective clothing, so as to create a dry, fresh, comfortable and clean environment for the wearer.
Disclosure of Invention
The technical task of the invention is to solve the defects of the prior art and provide a method and a device for cooling and dehumidifying the environment in protective clothing. The protective clothing comprises a medical protective clothing and a protective clothing system which needs to be worn under other special working environments, and the internal environment of the system is damp and hot due to the effects of self heating, water vapor diffusion and the like after a human body wears the system due to the air tightness, so that the comfort level is influenced. The method and the device provided by the patent can effectively reduce the temperature and dehumidify, so that the human body is in a comfortable state, and the pain is avoided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
1. the invention provides a device for cooling and dehumidifying the environment in protective clothing, which comprises: the device comprises a main control module, an air pump, a temperature sensor, a humidity sensor and a power supply;
the main control module adopts an Arduino single-chip microcomputer control system and is used for setting temperature and humidity thresholds, receiving information of the temperature sensor and the humidity sensor, sending a control instruction, comparing and judging the acquired temperature and humidity information with the thresholds, and sending the control instruction to the air pump according to a result;
the air pump is connected with the main control module and is connected with the air transmission pipeline, the air transmission pipeline is provided with an air inlet pipe and an air outlet pipe, dry air is input, and hot air in the protective clothing is discharged to create a dry atmosphere;
the temperature sensor is connected with the main control module and senses the temperature of the internal environment of the protective clothing in real time;
the humidity sensor is connected with the main control module and senses the humidity of the internal environment of the protective clothing in real time;
and the power supply is connected with the main control module and the air pump for supplying power.
Further, the software part of the main control module is realized by Arduino related programming software.
Furthermore, the power supply is a lithium battery, and the lithium battery is arranged in an outer pocket of the protective clothing.
Furthermore, the air transmission pipeline provides a passage for dry and comfortable air to flow, the air inlet pipe is wrapped with a filter membrane to prevent viruses and particles from entering the air transmission system, and dry and comfortable air is blown to the protective eyepieces and the regions of armpits and heads of people where sweat is easy to accumulate through the air transmission pipeline.
Further, the filter membrane is made of medical mask fabric.
Furthermore, the outlet duct has a plurality ofly, and a plurality of outlet ducts are connected to the air pump output through a plurality of branches of giving vent to anger, and the branch of giving vent to anger is the tree branch road.
Further, the protective clothing is provided with a final exhaust port 104 at the heel.
Further, the air pump also blows towards the protective eyepiece.
Further, the air pump inlet pipe is connected with an air cooling and drying module and used for cooling and drying external air, the refrigeration mode is electric refrigeration, refrigeration of a cold storage ice bag and refrigeration of a dry ice storage tank, chemical dehumidifying agents are added in humid seasons, dehumidifying treatment is carried out on input air, and the chemical dehumidifying agents comprise calcium chloride and silica gel particles.
2. The invention also provides a method for cooling and dehumidifying the environment in the protective clothing, which is based on a device for cooling and dehumidifying the environment in the protective clothing, and the device comprises: the device comprises a main control module, an air pump, a temperature sensor, a humidity sensor and a power supply;
the main control module adopts an Arduino single-chip microcomputer control system and is used for setting temperature and humidity thresholds, receiving information of the temperature sensor and the humidity sensor, sending a control instruction, comparing and judging the acquired temperature and humidity information with the thresholds, and sending the control instruction to the air pump according to a result;
the air pump is connected with the main control module and is connected with the air transmission pipeline, the air transmission pipeline is provided with an air inlet pipe and an air outlet pipe, dry air is input, and hot air in the protective clothing is discharged to create a dry atmosphere;
the temperature sensor is connected with the main control module and senses the temperature of the internal environment of the protective clothing in real time;
the humidity sensor is connected with the main control module and senses the humidity of the internal environment of the protective clothing in real time;
the power supply is connected with the main control module and the air pump for supplying power;
the temperature sensor and the humidity sensor accurately sense the temperature and the humidity of the internal environment of the protective clothing and feed the temperature and the humidity to the Arduino single-chip microcomputer control system, the Arduino single-chip microcomputer control system starts an air pump for cooling and dehumidifying according to a set temperature and humidity threshold system, but the temperature and the humidity are reduced to a lower threshold, and the Arduino single-chip microcomputer control system closes the air pump; when the temperature and humidity sensors continue to rise above the threshold value, the Arduino single-chip microcomputer control system starts the air pump again; the temperature and the humidity in the protective clothing are controlled within a comfortable range of a human body by circulating and reciprocating.
Compared with the prior art, the method and the device for cooling and dehumidifying the environment in the protective clothing have the beneficial effects that:
the invention provides a means for preventing damp-heat in long-acting protective clothing. The damp and hot proof and eyepiece antifog functions will always work as long as the power capacity allows. This is beyond the reach of the existing methods in the market. The invention provides a solution without guard, after the arrangement, the solution can be repeatedly recycled in a mode of automatic control of the single chip microcomputer, thereby providing more convenience for medical workers, industrial and mining enterprise personnel or other wearers.
Drawings
In order to more clearly describe the working principle of the method and the device for cooling and dehumidifying the environment inside the protective clothing, a schematic diagram is attached for further description.
FIG. 1 is a design and construction diagram of the cooling and dehumidifying device and method for the environment inside the protective clothing of the present invention;
FIG. 2 is a structural diagram of the air pump and the air outlet branch;
FIG. 3 is a layout of the air intakes and final exhaust of the suit;
fig. 4 is a schematic view of the structure of the eyepiece for eliminating fog.
In the drawings, each reference numeral denotes:
1. an air pump 2, a temperature sensor 3, a main control module 4, a power supply 5 and a humidity sensor,
101. an air inlet pipe 102, an air outlet pipe 103, an air inlet 104 and a final air outlet.
Detailed Description
Example one
As shown in fig. 1-4, the present invention provides a moisture-proof device for protective clothing worn by medical personnel in health care and industrial and mining enterprises, comprising: the device comprises a main control module 3, an air pump 1, a temperature sensor 2, a humidity sensor 5 and a power supply 4;
the main control module 3 adopts an Arduino single-chip microcomputer control system and is used for setting temperature and humidity thresholds, receiving information of the temperature sensor 2 and the humidity sensor 5, sending a control instruction, comparing and judging the acquired temperature and humidity information with the thresholds, and sending the control instruction to the air pump 1 according to the result;
the air pump 1 is connected with the main control module 3, the air pump 1 is connected with an air transmission pipeline, the air transmission pipeline is provided with an air inlet pipe 101 and an air outlet pipe 102, the air inlet pipe 101 is communicated with an air inlet 103, dry and comfortable air is input, and hot air in the protective clothing is discharged to create a dry and comfortable atmosphere;
the temperature sensor 2 is connected with the main control module 3 and senses the temperature of the internal environment of the protective clothing in real time;
the humidity sensor 5 is connected with the main control module 3 and senses the humidity of the internal environment of the protective clothing in real time;
and the power supply 4 is connected with the main control module 3 and the air pump 1 for power supply.
Wherein the software portion of the main control module 3 is implemented by Arduino-related programming software, such as Mixly.
Wherein the power supply 4 is a lithium battery which is arranged in an outer pocket of the protective clothing.
Wherein the gas transmission pipeline provides the route that dry and comfortable air flows, goes into trachea 101 department and wraps the filter membrane, prevents that virus, particulate matter from getting into the gas transmission system, through the gas transmission pipeline, blows the dry and comfortable wind through the branch road and reaches the protection eyepiece and the region of people's armpit, the easy sweat that accumulates of head.
Wherein the filter membrane is made of medical mask fabric.
The outlet pipes 102 are multiple, the outlet pipes 102 are connected to the output end of the air pump 1 through multiple outlet branches, and the outlet branches are tree branches.
Wherein the protective suit is provided with a final exhaust port 104 at the heel.
Wherein the air pump 1 also blows towards the protective eyepiece.
Wherein 1 income trachea 101 of air pump connects air cooling drying module for outside air's cooling and drying, the refrigeration mode is electric refrigeration, cold-stored ice bag refrigeration, dry ice storage tank refrigeration, to the vexed season of tide, adds chemical desiccant, carries out dehumidification to the input air and handles, chemical desiccant includes calcium chloride, silica gel granule.
Example two
The invention provides a method for cooling and dehumidifying the environment in protective clothing, which is a device for cooling and dehumidifying the environment in protective clothing based on the first embodiment and comprises the following steps: the device comprises a main control module 3, an air pump 1, a temperature sensor 2, a humidity sensor 5 and a power supply 4;
the main control module 3 adopts an Arduino single-chip microcomputer control system and is used for setting temperature and humidity thresholds, receiving information of the temperature sensor 2 and the humidity sensor 5, sending a control instruction, comparing and judging the acquired temperature and humidity information with the thresholds, and sending the control instruction to the air pump 1 according to the result;
the air pump 1 is connected with the main control module 3, the air pump 1 is connected with an air transmission pipeline, the air transmission pipeline is provided with an air inlet pipe 101 and an air outlet pipe 102, dry and comfortable air is input, and hot air in the protective clothing is discharged to create a dry and comfortable atmosphere;
the temperature sensor 2 is connected with the main control module 3 and senses the temperature of the internal environment of the protective clothing in real time;
the humidity sensor 5 is connected with the main control module 3 and senses the humidity of the internal environment of the protective clothing in real time;
the power supply 4 is connected with the main control module 3 and the air pump 1 for supplying power;
after the whole set of system is assembled, program parameters are written by software (such as Mixly), for example, the upper limit of the set temperature is 32 ℃ and the humidity is 70%, when the temperature is higher than 32 ℃ or the humidity is higher than 70%, the air pump 1 is automatically started and is conveyed into the protective clothing from the external environment, the temperature of the air input from the outside is lower than 32 ℃, and the humidity is lower than 70%, so that the internal hot air can be expelled, a dry atmosphere is created, and a damp and hot state is avoided. In addition, related dry and comfortable air purging avoids the fog formation of the protective eyepieces, so that the visual field is clear. The power supply 4 is a lithium battery and provides required electric energy for the singlechip and the pump. During the use of the device, the singlechip and the battery can be arranged in the pocket. The refrigeration can be realized by electric refrigeration, and cool air can be supplied by utilizing the power supply principle of a lithium battery and depending on the Patier effect. The ice bag can be used for refrigerating, the dry ice storage tank and the like (the dry ice storage tank is suitable for environments with good ventilation, such as outdoor environments, underground environments with good ventilation and the like, and the effect is that the heat absorption value is large), the ice bag is a good choice for the hospital environment, and ice blocks stored in the ice bag can be placed back to the refrigerator for recycling after being melted. In the humid season, input air needs to be dehumidified, chemical dehumidifying agents such as calcium chloride and silica gel particles can be adopted, and moisture entering the protective clothing is captured through the dehumidifying agents, so that the air entering the protective clothing is dry and comfortable.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In addition to the technical features described in the specification, the technology is known to those skilled in the art.
Claims (10)
1. The utility model provides a device of interior environment cooling dehumidification of protective clothing which characterized in that, it includes: the device comprises a main control module, an air pump, a temperature sensor, a humidity sensor and a power supply;
the main control module adopts an Arduino single-chip microcomputer control system and is used for setting temperature and humidity thresholds, receiving information of the temperature sensor and the humidity sensor, sending a control instruction, comparing and judging the acquired temperature and humidity information with the thresholds, and sending the control instruction to the air pump according to a result;
the air pump is connected with the main control module and is connected with the air transmission pipeline, the air transmission pipeline is provided with an air inlet pipe and an air outlet pipe, dry air is input, and hot air in the protective clothing is discharged to create a dry atmosphere;
the temperature sensor is connected with the main control module and senses the temperature of the internal environment of the protective clothing in real time;
the humidity sensor is connected with the main control module and senses the humidity of the internal environment of the protective clothing in real time;
and the power supply is connected with the main control module and the air pump for supplying power.
2. The device for cooling and dehumidifying an environment inside protective clothing according to claim 1, wherein the software portion of the main control module is implemented by Arduino-related programming software.
3. The device for cooling and dehumidifying the environment inside protective clothing according to claim 1 or 2, wherein the power source is a lithium battery, and the lithium battery is placed in the outer pocket of the protective clothing.
4. The device for cooling and dehumidifying the environment in protective clothing according to claim 1 or 2, wherein the air transmission pipeline provides a passage for dry air to flow, the air inlet pipe is wrapped with a filter membrane to prevent viruses and particles from entering the air transmission system, and the dry air is blown to the protective eyepieces and the armpits and the area where sweat is easily accumulated on the head of a person through the air transmission pipeline.
5. The device for cooling and dehumidifying an environment inside protective clothing of claim 4, wherein the filter membrane is made of medical mask fabric.
6. The device for cooling and dehumidifying an environment in protective clothing of claim 1, 2 or 5, wherein the number of the air outlet pipes is multiple, the air outlet pipes are connected to an output end of the air pump through a plurality of air outlet branches, and the air outlet branches are tree branches.
7. The device for cooling and dehumidifying environment in protective clothing of claim 1, 2 or 5, wherein the protective clothing is provided with a final exhaust port at the heel.
8. The device for cooling and dehumidifying the environment inside protective clothing of claim 1, 2 or 5, wherein the air pump also blows towards the protective eyepieces.
9. The device for cooling and dehumidifying the environment in the protective clothing according to claim 1, 2 or 5, wherein the air inlet pipe of the air pump is connected with the air cooling and drying module and used for cooling and drying the outside air, the cooling mode is electric cooling, refrigeration by a cold storage ice bag and refrigeration by a dry ice storage tank, and for a humid season, a chemical dehumidifier is added to dehumidify the input air, and the chemical dehumidifier comprises calcium chloride and silica gel particles.
10. The method for cooling and dehumidifying the environment in the protective clothing is characterized in that the device based on cooling and dehumidifying the environment in the protective clothing comprises the following steps: the device comprises a main control module, an air pump, a temperature sensor, a humidity sensor and a power supply;
the main control module adopts an Arduino single-chip microcomputer control system and is used for setting temperature and humidity thresholds, receiving information of the temperature sensor and the humidity sensor, sending a control instruction, comparing and judging the acquired temperature and humidity information with the thresholds, and sending the control instruction to the air pump according to a result;
the air pump is connected with the main control module and is connected with the air transmission pipeline, the air transmission pipeline is provided with an air inlet pipe and an air outlet pipe, dry air is input, and hot air in the protective clothing is discharged to create a dry atmosphere;
the temperature sensor is connected with the main control module and senses the temperature of the internal environment of the protective clothing in real time;
the humidity sensor is connected with the main control module and senses the humidity of the internal environment of the protective clothing in real time;
the power supply is connected with the main control module and the air pump for supplying power;
the temperature sensor and the humidity sensor accurately sense the temperature and the humidity of the internal environment of the protective clothing and feed the temperature and the humidity to the Arduino single-chip microcomputer control system, the Arduino single-chip microcomputer control system starts an air pump for cooling and dehumidifying according to a set temperature and humidity threshold system, but the temperature and the humidity are reduced to a lower threshold, and the Arduino single-chip microcomputer control system closes the air pump; when the temperature and humidity sensors continue to rise above the threshold value, the Arduino single-chip microcomputer control system starts the air pump again; the temperature and the humidity in the protective clothing are controlled within a comfortable range of a human body by circulating and reciprocating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110141371.1A CN112859973A (en) | 2021-02-02 | 2021-02-02 | Method and device for cooling and dehumidifying environment in protective clothing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110141371.1A CN112859973A (en) | 2021-02-02 | 2021-02-02 | Method and device for cooling and dehumidifying environment in protective clothing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112859973A true CN112859973A (en) | 2021-05-28 |
Family
ID=75986175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110141371.1A Pending CN112859973A (en) | 2021-02-02 | 2021-02-02 | Method and device for cooling and dehumidifying environment in protective clothing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112859973A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1050762A (en) * | 1989-08-30 | 1991-04-17 | 阿兰·寿 | The method of air conditioning and device |
| US20110022137A1 (en) * | 2007-11-15 | 2011-01-27 | James Cook University | Cooling garment |
| CN111700329A (en) * | 2020-06-05 | 2020-09-25 | 崇左市人民医院 | Portable human microenvironment cooling and drying system under airtight environment for epidemic prevention |
| CN211794489U (en) * | 2020-02-23 | 2020-10-30 | 重庆市和诚机械设备制造有限公司 | Recyclable totally-enclosed intelligent protective clothing |
| CN212065793U (en) * | 2020-03-03 | 2020-12-04 | 冷吕友 | Medical radiation protection device with cooling and dehumidifying functions |
| CN212212812U (en) * | 2020-04-16 | 2020-12-25 | 井冈山大学 | Ventilation defogging protective clothing |
-
2021
- 2021-02-02 CN CN202110141371.1A patent/CN112859973A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1050762A (en) * | 1989-08-30 | 1991-04-17 | 阿兰·寿 | The method of air conditioning and device |
| US5058388A (en) * | 1989-08-30 | 1991-10-22 | Allan Shaw | Method and means of air conditioning |
| US20110022137A1 (en) * | 2007-11-15 | 2011-01-27 | James Cook University | Cooling garment |
| CN211794489U (en) * | 2020-02-23 | 2020-10-30 | 重庆市和诚机械设备制造有限公司 | Recyclable totally-enclosed intelligent protective clothing |
| CN212065793U (en) * | 2020-03-03 | 2020-12-04 | 冷吕友 | Medical radiation protection device with cooling and dehumidifying functions |
| CN212212812U (en) * | 2020-04-16 | 2020-12-25 | 井冈山大学 | Ventilation defogging protective clothing |
| CN111700329A (en) * | 2020-06-05 | 2020-09-25 | 崇左市人民医院 | Portable human microenvironment cooling and drying system under airtight environment for epidemic prevention |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104023575B (en) | Wear clothing | |
| CN102166045A (en) | Whole-body type positive-pressure biological protective clothing with monitoring system | |
| CN111084939A (en) | Intelligent wearing equipment for coal occupational disease protection and coal occupational disease prevention and control method | |
| CN212279957U (en) | Coal mine occupational disease protection intelligent wearable equipment suitable for being applied to fixed places | |
| EP3542658B1 (en) | Negative pressure isolation hood | |
| CN211935225U (en) | Protective head cover | |
| CN210248568U (en) | Medical lens antifogging active ventilation and filtration multifunctional protective helmet | |
| CN111887525A (en) | Moisture and heat ventilation assembly for medical and industrial protective clothing | |
| CN1488302A (en) | Enclosed integrated protective garment | |
| CN112859973A (en) | Method and device for cooling and dehumidifying environment in protective clothing | |
| JP2008212603A5 (en) | ||
| CN213760266U (en) | Nanometer double-filtering split mask | |
| CN116098333A (en) | Protective clothing and protective method | |
| CN211659100U (en) | Intelligent protective wearing equipment for coal occupational diseases | |
| CN111803815B (en) | Antiviral intelligent regulation protection headgear | |
| CN2577618Y (en) | Epidemic safety clothing | |
| CN212233269U (en) | Multifunctional positive-pressure medical protective clothing | |
| KR102352015B1 (en) | Functional workwear for cooling and windproof and musculoskeletal preservation | |
| CN211068815U (en) | Dust-proof antifogging protective mask for coal mine | |
| CN102989092A (en) | Air pressure type antifog and antigas mask | |
| CN111450433A (en) | Nanometer double-filtering split mask | |
| CN206079096U (en) | Improve operating condition's under abominable operating mode environment protection system | |
| CN205624567U (en) | Antichemical clothes window that possesses anti -fog function | |
| CN111657615A (en) | Pathogenic bacteria protection type fan cap | |
| CN212488638U (en) | Protective garment with ventilation function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210528 |
|
| RJ01 | Rejection of invention patent application after publication |