阅读说明：本技术 压差传感器过滤器及其应用 (Differential pressure sensor filter and application thereof ) 是由 王栋 佟海龙 卜云婷 张珂智 魏一 赵春晖 孙百明 吕士昆 于 2019-10-22 设计创作，主要内容包括：一种压差传感器过滤器及其应用,其中压差传感器过滤器包括：上盖,所述上盖的顶部设置有疏水导气孔,顶部内侧设置有水汽冷凝网；底座,与所述上盖的底部连接,所述底座内部用于连接压差传感器接口；以及挡水罩,覆盖于所述上盖的顶部,所述挡水罩表面设置有导气孔。喷淋时大部分水汽被挡水罩阻挡,只有少部分水汽从挡水罩的导气孔中进入至过滤器内部,由水汽冷凝网对水汽中的汽化水分子进行冷凝干燥,冷凝后的水顺着疏水导气孔流出,并沿挡水罩上的导气孔排出至过滤器外部,在保证气路畅通的基础上实现了阻水和排水功能,有效解决了由于水汽量大进入压差传感器导致的传感器被堵塞而无法进行压力传感检测或者检测结果不准确的技术问题。(A differential pressure sensor filter and applications thereof, wherein the differential pressure sensor filter comprises: the top of the upper cover is provided with a hydrophobic air guide hole, and the inner side of the top is provided with a water vapor condensation net; the base is connected with the bottom of the upper cover, and the inside of the base is used for connecting a differential pressure sensor interface; and the water retaining cover covers the top of the upper cover, and air guide holes are formed in the surface of the water retaining cover. Most steam is blockked by the manger plate cover when spraying, only a small part of steam enters into inside the filter from the air guide hole of manger plate cover, carry out the condensation drying to the vaporization hydrone in the steam by the steam condensation net, water after the condensation flows along hydrophobic air guide hole to along the air guide hole discharge to the filter outside on the manger plate cover, realized blocking water and drainage function on the basis of guaranteeing the unblocked gas circuit, effectively solved because the sensor that the big entering differential pressure sensor of vapor volume leads to is blockked up and can't carry out pressure sensing and detect or the inaccurate technical problem of testing result.)

1. A differential pressure sensor filter, comprising:

the top of the upper cover (2) is provided with a hydrophobic air guide hole (15), and the inner side of the top is provided with a water vapor condensation net (11);

the base (1) is connected with the bottom of the upper cover (2), and the inside of the base (1) is used for connecting a differential pressure sensor interface; and

the water retaining cover (3) covers the top of the upper cover (2), and air guide holes (16) are formed in the surface of the water retaining cover (3).

2. The differential pressure sensor filter according to claim 1, characterized in that a primary filter (8) and a secondary filter (6) are arranged inside the upper cover (2), and the moisture condensation net (11), the primary filter (8) and the secondary filter (6) are arranged in sequence in the gas transmission direction, wherein the primary filter (8) is used for further filtering moisture in the gas after passing through the moisture condensation net (11), and the secondary filter (6) is used for filtering biohazard factors in the air after passing through the primary filter (8).

3. The differential pressure sensor filter according to claim 1, characterized in that the top of the upper cover (2) is a table structure as a water retaining slope (14), and the hydrophobic air guide hole (15) is positioned at the bottom side edge of the table structure; the water vapor condensation net (11) and the hydrophobic air guide holes (15) are positioned on the same plane.

4. The differential pressure sensor filter according to claim 3, wherein the upper cover (2) comprises: the top of the upper cover (2) is relatively protruded from the upper cover body (13) and the radial size of the upper cover body is reduced, so that the water retaining cover (3) can be assembled.

5. The differential pressure sensor filter according to claim 1 or 2, characterized in that a compression block (10) is arranged inside the upper cover (2), and the compression block (10) abuts against one side of the water vapor condensation net (11) to fasten the water vapor condensation net (11) on the inner side of the top of the upper cover (2).

6. The differential pressure sensor filter according to claim 5, characterized in that the inner wall (17) of the compact block (10) has a slope such that moisture in the gas passing through the moisture condensation screen (11) condenses on the inner wall (17) and flows out along the slope of the inner wall (17).

7. The differential pressure sensor filter of claim 5,

the base (1), the upper cover (2) and the water retaining cover (3) are made of corrosion-resistant materials;

the material of the pressing block (10) is stainless steel.

8. The differential pressure sensor filter of claim 2,

a groove is formed in the end face of the bottom of the base (1) and used for placing a first sealing element (4);

the joint between the primary filter (8) and the secondary filter (6) is sealed by a third sealing element (7);

the joint between the base (1) and the secondary filter (6) is sealed by a second sealing element (5);

and the seam between the upper cover (2) and the water retaining cover (3) is sealed by a fifth sealing element (12).

9. The differential pressure sensor filter according to claim 5, characterized in that the seam between the compression block (10) and the primary filter (8) is sealed by a fourth seal (9).

10. Use of a differential pressure sensor filter according to any of claims 1-9 in a biosafety laboratory.

Technical Field

The disclosure belongs to the technical field of biological safety laboratory equipment, and relates to a differential pressure sensor filter and application thereof.

Background

The biological safety laboratory is a biological laboratory or an animal laboratory which can avoid or control the harm of the operated harmful biological factors through a protective barrier and management measures and meet the biological safety requirement.

The chemistry shower bath is the important barrier of isolation laboratory and clean district, and laboratory operating personnel is carrying out the chemical agent and sprays in the chemistry shower bath with the malleation protective clothing, washes the disinfection to the protective clothing surface, avoids the experimenter to leave the pollution area with biological hazard factor area when leaving the pollution area. The chemical shower room is an important component of a biological safety laboratory, and the pressure in the chemical shower room also needs to be monitored and controlled in real time, so that a pressure difference sensor pressure collecting port is arranged in the chemical shower room. The pressure production port is connected to the differential pressure sensor through a conduit.

Disclosure of Invention

Technical problem to be solved

The present disclosure provides a differential pressure sensor filter and applications thereof to at least partially solve the following technical problems: the filter connected at the interface of the differential pressure sensor is simple in design at present, the problems of filter blockage caused by large water vapor amount and a humid environment during spraying are not considered, and therefore the differential pressure sensor can be further inaccurate in detection, and further the room pressure is out of control.

(II) technical scheme

According to one aspect of the present disclosure, there is provided a differential pressure sensor filter comprising: the top of the upper cover 2 is provided with a hydrophobic air guide hole 15, and the inner side of the top is provided with a water vapor condensation net 11; the base 1 is connected with the bottom of the upper cover 2, and the inside of the base 1 is used for connecting a differential pressure sensor interface; and the water retaining cover 3 covers the top of the upper cover 2, and the surface of the water retaining cover 3 is provided with an air guide hole 16.

In an embodiment of the present disclosure, a primary filter 8 and a secondary filter 6 are disposed inside the upper cover 2, and the moisture condensation net 11, the primary filter 8 and the secondary filter 6 are sequentially disposed in a gas transmission direction, wherein the primary filter 8 is configured to further filter moisture in the gas after passing through the moisture condensation net 11, and the secondary filter 6 is configured to filter biohazard factors in the air after passing through the primary filter 8.

In an embodiment of the present disclosure, the top of the upper cover 2 is a table structure, which serves as a water retaining slope 14, and the hydrophobic air guide hole 15 is located at the bottom side edge of the table structure; the water vapor condensation net 11 and the hydrophobic air guide holes 15 are positioned on the same plane.

In an embodiment of the present disclosure, the upper cover 2 includes: the top of the upper cover 2 is relatively protruded from the upper cover body 13, and the radial size of the top of the upper cover is reduced, so that the water retaining cover 3 can be assembled.

In an embodiment of the present disclosure, a pressing block 10 is disposed inside the upper cover 2, and the pressing block 10 abuts against one side of the water vapor condensation net 11, so as to fasten the water vapor condensation net 11 on the inner side of the top of the upper cover 2.

In an embodiment of the present disclosure, the inner wall 17 of the compact block 10 has a slope, so that moisture in the gas passing through the water vapor condensation net 11 is condensed on the inner wall 17 and flows out along the slope of the inner wall 17.

In an embodiment of the present disclosure, the base 1, the upper cover 2 and the water-retaining cover 3 are made of corrosion-resistant materials; the material of the pressing block 10 is stainless steel.

In an embodiment of the present disclosure, a groove is formed on a bottom end surface of the base 1 for placing the first sealing element 4; the seam between the primary filter 8 and the secondary filter 6 is sealed by a third sealing member 7; the seam between the base 1 and the secondary filter 6 is sealed by a second sealing member 5; the seam between the upper cover 2 and the water retaining cover 3 is sealed by a fifth sealing element 12.

In an embodiment of the present disclosure, the seam between the compression block 10 and the primary filter 8 is sealed by a fourth seal 9.

According to another aspect of the present disclosure, there is provided a use of the differential pressure sensor filter in a biosafety laboratory, in particular in a chemical shower.

(III) advantageous effects

According to the technical scheme, the differential pressure sensor filter and the application thereof have the following beneficial effects:

(1) through setting up the manger plate cover, most steam is blockked by the manger plate cover when spraying, only a small part of steam (the air that has steam) gets into to inside the filter from the air guide hole of manger plate cover, moist air (steam) get into inside the upper cover along the hydrophobic air guide hole at upper cover top, meet with the steam condensation net, carry out the condensation drying to the vaporization hydrone in the steam by the steam condensation net, water after the condensation flows along hydrophobic air guide hole, and discharge to the filter outside along the air guide hole on the manger plate cover, realized on the basis of guaranteeing that the gas circuit is unblocked sheltering from and effectively derive water to steam, effectively solved because the sensor that the big entering differential pressure sensor of steam volume leads to is blockked up and can't carry out the inaccurate basic technical problem of pressure sensing detection or testing result.

(2) On the basis of solving the basic technical problem, the water in the gas passing through the water vapor condensation net is further filtered based on the primary filter by arranging the two-stage filter, the biological hazard factors in the air passing through the primary filter are filtered by the two-stage filter, the biological hazard factors can be isolated, the sensor equipment is protected from being polluted, the advantages of splashing prevention, water vapor isolation, filter blockage prevention and the like are achieved, and the potential risk of leakage of the biological hazard factors under the condition that the conduit leaks is avoided.

(3) Set up the structure at upper cover top through optimizing, set up the upper cover top into desk-top structure (can be round platform or terrace with edge etc.), as the retaining slope, further effectively block partly by the air guide hole entering into the inside steam of filter on the basis of manger plate cover, make partial steam take place to condense and drop on the retaining slope, from the air guide hole direct discharge, make this retaining slope of less steam cross enter into to the upper cover top inboard along hydrophobic air guide hole, then realize blockking and the water guide function by steam condensation net, the filter effect to steam has been improved.

(4) The compact heap provides fastening effort for the steam condensation net on the one hand, and on the other hand also can play further condensation effect to steam, and moisture in the gas through the steam condensation net still can condense in the inner wall of compact heap, and the inner wall design at the compact heap has the slope, can make the comdenstion water flow along the slope, realizes further blocking water and drainage function.

Drawings

Fig. 1 is a schematic cut-away perspective view of a differential pressure sensor filter according to an embodiment of the present disclosure.

Fig. 2 is an exploded view of the construction of the differential pressure sensor filter shown in fig. 1.

Fig. 3 is a cross-sectional view of the differential pressure sensor filter shown in fig. 1.

[ notation ] to show

1-a base; 2-covering the upper cover;

3-a water retaining cover; 4-a first seal;

5-a second seal; 6-a secondary filter;

7-a third seal; 8-first-stage filter;

9-a fourth seal; 10-a compression block;

11-a water vapor condensation net; 12-a fifth seal;

13-upper cover body; 14-water retaining slope;

15-hydrophobic gas-guide holes; 16-air vents;

17-inner wall.

Detailed Description

Before spraying, the chemical shower enclosure belongs to a polluted area. In the spraying process, the chemical shower room has large water vapor amount and high air humidity and is in a negative pressure state. The filter connected at the interface of the differential pressure sensor is simple in design at present, the problems of filter blockage caused by large water vapor amount and a humid environment during spraying are not considered, and therefore the differential pressure sensor can be further inaccurate in detection, and further the room pressure is out of control. In addition, because the differential pressure sensor only has the function of pressure sensing, the biological hazard factors which leak cannot be blocked, and if the conduit connected with the differential pressure sensor leaks, the potential risk of the leakage of the biological hazard factors exists.

Based on the technical problems found, the disclosure provides a differential pressure sensor filter and an application thereof, the differential pressure sensor filter of the disclosure is provided with a water blocking cover, most of water vapor is blocked by the water blocking cover when spraying, only a small part of water vapor (air with water vapor) enters the filter from an air guide hole of the water blocking cover, the humid air (water vapor) enters the upper cover along a hydrophobic air guide hole at the top of the upper cover, and is subjected to a water vapor condensation net, the water vapor in the water vapor is condensed and dried by the water vapor condensation net, the condensed water flows out along the hydrophobic air guide hole and is discharged to the outside of the filter along the air guide hole on the water blocking cover, on the basis of ensuring the unblocked gas circuit, the device realizes the shielding of vapor and the effective leading-out of water, and effectively solves the problems that the sensor is blocked and the pressure sensing detection cannot be carried out or the detection result is inaccurate because the vapor enters the differential pressure sensor in large quantity. On the basis, the two-stage filter is further arranged, the moisture in the gas passing through the water vapor condensation net is further filtered on the basis of the first-stage filter, the second-stage filter is used for filtering biohazard factors in the air passing through the first-stage filter, the biohazard factors can be isolated, the sensor equipment is protected from being polluted, and meanwhile the device has the advantages of splashing prevention, water vapor isolation, filter blockage prevention and the like.

For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

First embodiment

In a first exemplary embodiment of the present disclosure, a differential pressure sensor filter is provided.

Fig. 1 is a schematic cut-away perspective view of a differential pressure sensor filter according to an embodiment of the present disclosure. Fig. 2 is an exploded view of the construction of the differential pressure sensor filter shown in fig. 1. Fig. 3 is a cross-sectional view of the differential pressure sensor filter shown in fig. 1.

Herein, throughout the description, "top" is a direction along the right side in fig. 2/3, and "bottom" is a direction along the left side in fig. 2/3. The top and bottom descriptions are with respect to the drawings, and in actual construction, the relative directions of descriptions may vary as the overall structure is positionally shifted or flipped.

Referring to fig. 1-3, a differential pressure sensor filter of the present disclosure includes: the top of the upper cover 2 is provided with a hydrophobic air guide hole 15, and the inner side of the top is provided with a water vapor condensation net 11; the base 1 is connected with the bottom of the upper cover 2, and the inside of the base 1 is used for connecting a differential pressure sensor interface; and the water retaining cover 3 covers the top of the upper cover 2, and the surface of the water retaining cover 3 is provided with an air guide hole 16.

The wet air enters between the water retaining cover 3 and the upper cover 2 through the air guide holes 16, then enters the upper cover 2 along the hydrophobic air guide holes 15, the wet air is condensed and dried through the water vapor condensation net 11, and the condensed water flows out along the hydrophobic air guide holes 15 and is discharged along the air guide holes 16 on the water retaining cover 3. The gas that finally enters the conduit inside the differential pressure sensor through the differential pressure sensor interface after filtration is dry gas (theoretically, contains water vapor with extremely low concentration, and the influence on the conduit can be ignored).

In this embodiment, the air hole 16 of the water guard 3 is disposed downward in use, so as to realize a drainage function.

Referring to fig. 1-3, the differential pressure sensor filter of the present disclosure allows the differential pressure sensor to communicate with the gas of the external environment to detect the gas pressure of the chemical shower enclosure at the sampling port side, and the gas path is as follows: inside gas in the external environment entered into the filter along the gas guide 16 on water retaining cover 3 surface, was located between water retaining cover 3 and the 2 tops of upper cover, then entered into to 2 tops of upper cover inside through the hydrophobic gas guide 15 at 2 tops of upper cover, transmitted along 2 insides of upper cover after steam condensation net 11, transmitted to the differential pressure sensor interface through 1 inside at last, along the differential pressure sensor interface entering pipe.

Generally speaking, the diameter size of a conduit connected with a differential pressure sensor is phi 1mm-2mm, under a shower environment, the concentration of water vapor in air is very large, water vapor directly enters one side of the differential pressure sensor, a very tiny water drop easily blocks or partially blocks the conduit, so that the pressure on one side of the differential pressure sensor cannot be measured, or the test result of the differential pressure sensor is inaccurate, as shown in fig. 1, the differential pressure sensor disclosed by the invention is provided with a water blocking cover 3, most of the water vapor is blocked by the water blocking cover 3 during spraying, only a small part of the water vapor (air with water vapor) enters the filter from an air guide hole 16 of the water blocking cover 3, moist air (water vapor) enters the upper cover 2 along a hydrophobic air guide hole 15 at the top of the upper cover 2, and meets a water vapor condensation net 11, and the vaporized water molecules in the water vapor are condensed and dried by the water vapor condensation net 11, the condensed water flows out along the hydrophobic air guide hole 15 and is discharged to the outside of the filter along the air guide hole 16 on the water retaining cover 3, the shielding of water vapor and the effective leading of the water are realized on the basis of ensuring the smoothness of an air path, and the basic technical problem that the pressure sensing detection cannot be carried out or the detection result is inaccurate because the sensor is blocked due to the large amount of the water vapor entering the differential pressure sensor is effectively solved

In an embodiment of the present disclosure, referring to fig. 1 to 3, a primary filter 8 and a secondary filter 6 are disposed inside the upper cover 2, and the moisture condensation net 11, the primary filter 8 and the secondary filter 6 are sequentially disposed in a gas transmission direction (the gas transmission direction refers to a direction in which gas is transmitted from an external environment to the differential pressure sensor, and a gas path has been described above), wherein the primary filter 8 is configured to further filter moisture in the gas after passing through the moisture condensation net 11, and the secondary filter 6 is configured to filter biohazard factors in the air after passing through the primary filter 8.

On the basis of solving the basic technical problem of the blockage, the water in the gas passing through the water vapor condensation net is further filtered based on the primary filter by arranging the two-stage filter, the biological hazard factors in the air passing through the primary filter are filtered by the two-stage filter, the biological hazard factors can be isolated, the sensor equipment is protected from being polluted, meanwhile, the device has the advantages of splashing prevention, water vapor isolation, filter blockage prevention and the like, and the potential risk of leakage of the biological hazard factors under the condition that the conduit leaks is avoided.

In this embodiment, the differential pressure sensor filter is exemplified as a cylindrical shape, and in other embodiments, the external shape of the differential pressure sensor filter may be other shapes. In this embodiment, the base 1, the upper cover 2 and the water-retaining cover 3 are made of corrosion-resistant materials, such as corrosion-resistant resin materials; the material of the pressing block 10 is stainless steel, for example, stainless steel 316.

In an embodiment of the present disclosure, referring to fig. 3, the base 1 and the upper cover 2 are assembled by a screw thread, the external thread of the base 1 matches the internal thread of the upper cover 2, and the internal thread of the base 1 matches the external thread of the differential pressure sensor interface.

In an embodiment of the present disclosure, referring to fig. 2, the upper cover 2 includes: the top of the upper cover 2 is relatively protruded from the upper cover body 13, and the radial size of the top of the upper cover is reduced, so that the water retaining cover 3 can be assembled. Here, the assembly of the top of the protruding upper cover 2 and the water blocking cover 3 is exemplified, and in other embodiments, other assembly forms are possible.

In an embodiment of the present disclosure, referring to fig. 2 and 3, the top of the upper cover 2 is a table structure as a water retaining slope 14, and the hydrophobic air vents 15 are located at the bottom side edge of the table structure; the water vapor condensation net 11 and the hydrophobic air guide holes 14 are positioned on the same plane. For example, in the present example, a truncated cone is used for illustration, but in other embodiments, the truncated cone may be a truncated pyramid or another shape having a water blocking slope.

Set up the structure at upper cover top through optimizing, set up the upper cover top into desk-top structure (can be round platform or terrace with edge etc.), as retaining slope 14, further effectively block partly the steam that has entered into to the filter inside by gas guide hole 16 on the basis of manger plate cover 3, make partial steam take place to condense and drop on retaining slope 14, from gas guide hole 16 direct discharge, make less steam cross this retaining slope 14 and enter into to 2 tops inboardly of upper cover along hydrophobic gas guide hole 15, then realize blockking and the water guide function by steam condensation net 11, the filter effect to steam has been improved.

In an embodiment of the present disclosure, referring to fig. 2 to 3, a pressing block 10 is disposed inside the upper cover 2, and the pressing block 10 abuts against one side of the water vapor condensation net 11, so as to fasten the water vapor condensation net 11 on the inner side of the top of the upper cover 2.

Further, the inner wall 17 of the pressing block 10 has a slope, so that moisture in the gas passing through the water vapor condensation net 11 is condensed on the inner wall 17 and flows out along the slope of the inner wall 17.

Compact heap 10 provides fastening effort for steam condensation net 11 on the one hand, and on the other hand also can play further condensation to steam, and moisture in the gas through steam condensation net 11 still can condense in compact heap 10's inner wall. Through the inner wall 17 design slope at compact heap 10, can make the comdenstion water flow along the slope, realize further blocking water and drainage function, wherein the function of blocking water means that the condensation of utilizing steam on compact heap 10 has blockked the water that carries in the air and has passed through this compact heap 10, has realized the effect of blockking, and the drainage function means that the slope of the inner wall 17 that utilizes compact heap 10 makes the comdenstion water derive, has realized the drainage function.

In one example, a sealing member is arranged at the joint gap of each component to ensure the tightness of the outer edge of the device and avoid moisture from entering the filter from the joint to cause the internal filtering effect to be poor.

In an embodiment of the present disclosure, referring to fig. 1 to 3, a bottom end surface of the base 1 is provided with a groove for placing the first sealing member 4. The seam between the primary filter 8 and the secondary filter 6 is sealed by a third sealing member 7. The seam between the base 1 and the secondary filter 6 is sealed by a second seal 5. The seam between the upper cover 2 and the water retaining cover 3 is sealed by a fifth sealing element 12. The seam between the pressing block 10 and the primary filter 8 is sealed by a fourth sealing element 9.

In this embodiment, the first seal 4, the second seal 5, the third seal 7, the fourth seal 9, and the fifth seal 12 are, for example, O-rings, corresponding to the overall cylindrical shape, but in other embodiments, the form of the seals may be adapted. The material of the sealing element is a material which is resistant to corrosion of chemical reagents and has better air tightness.

To sum up, the pressure differential sensor filter of this embodiment blocks most steam outside the filter through setting up the manger plate cover, the inside steam of entering filter carries out the condensation drying to the vaporization hydrone by the steam condensation net, water after the condensation flows along hydrophobic air guide hole to along the air guide hole discharge to the filter outside on the manger plate cover, realized on the basis of guaranteeing that the gas circuit is unblocked sheltering from and effectively derive water to steam, effectively solved because the sensor that the big entering pressure differential sensor of steam volume leads to is blockked up and can't carry out pressure sensing and detect or the inaccurate problem of testing result. Further still through setting up two-stage filter, effectively having kept apart biohazard factor, protect sensor equipment not receive the pollution, still have simultaneously and keep off advantages such as splash, keep apart steam and prevent that the filter from blockking up, avoided having the potential risk that biohazard factor leaked under the condition that the pipe takes place to leak.

Second embodiment

In a second exemplary embodiment of the present disclosure, there is provided a use of the differential pressure sensor filter in a bio-safety laboratory, in particular in a chemical shower enclosure of a bio-safety laboratory. Of course, the method can also be applied to isolating the pressure collecting port of the differential pressure sensor in other humid environments. In addition, the method is also suitable for application scenes of preventing aerosols such as viruses and bacteria from leaking.

In the chemistry shower bath, be connected with differential pressure sensor based on this differential pressure sensor filter inside differential pressure sensor interface, when carrying out the pressure differential test, because the manger plate cover, the setting of steam condensation net, realized blockking of steam and the effective derivation of most steam, it is dry and no biohazard's gas all the time to enter into to the inside gas of differential pressure sensor connecting pipe after filtering, the water vapour volume that corresponds when spraying is big and the unable gas detection process that influences of humid environment, can also effectively avoid the potential risk that biohazard factor leaked in addition.

In conclusion, the disclosure provides a pressure difference sensor filter and application thereof, through setting up the water blocking cover, most steam is blocked by the water blocking cover when spraying, only a small part of steam enters into the filter from the air guide hole of the water blocking cover, the humid air enters into the upper cover along the hydrophobic air guide hole at the top of the upper cover, encounter with the steam condensation net, the vaporized water molecules in the steam are condensed and dried by the steam condensation net, the condensed water flows out along the hydrophobic air guide hole, and is discharged to the outside of the filter along the air guide hole on the water blocking cover, the shielding of the steam and the effective leading-out of the water are realized on the basis of ensuring the unblocked air path, and the basic technical problem that the pressure sensing detection cannot be carried out or the detection result is inaccurate due to the fact that the sensor is blocked because the steam enters the pressure difference sensor in large quantity is. On the basis of solving the basic technical problem, the water in the gas passing through the water vapor condensation net is further filtered based on the primary filter by arranging the two-stage filter, the biological hazard factors in the air passing through the primary filter are filtered by the two-stage filter, the biological hazard factors can be isolated, the sensor equipment is protected from being polluted, the advantages of splashing prevention, water vapor isolation, filter blockage prevention and the like are achieved, and the potential risk of leakage of the biological hazard factors under the condition that the conduit leaks is avoided. Through optimizing the structure that sets up the upper cover top and setting up the compact heap, further strengthened steam and blockked and the water guide function, improved the filter effect to steam.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, is intended in an open-ended sense, and does not exclude the presence of other elements, components, portions or items than those listed. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.

The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.