CN115662115A - Purification protection device for expressway tunnel monitoring equipment and control method thereof - Google Patents

Purification protection device for expressway tunnel monitoring equipment and control method thereof Download PDF

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Publication number
CN115662115A
CN115662115A CN202211240788.4A CN202211240788A CN115662115A CN 115662115 A CN115662115 A CN 115662115A CN 202211240788 A CN202211240788 A CN 202211240788A CN 115662115 A CN115662115 A CN 115662115A
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China
Prior art keywords
air
filter layer
semi
axial flow
flow fan
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Pending
Application number
CN202211240788.4A
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Chinese (zh)
Inventor
刘炜
周世军
蔡姣
刘松荣
肖燕萍
陈颖
郝功伟
晏致涛
马非
钟永力
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Zhejiang Jiaotou Expressway Operation Management Co ltd
Chongqing University of Science and Technology
Original Assignee
Zhejiang Jiaotou Expressway Operation Management Co ltd
Chongqing University of Science and Technology
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Application filed by Zhejiang Jiaotou Expressway Operation Management Co ltd, Chongqing University of Science and Technology filed Critical Zhejiang Jiaotou Expressway Operation Management Co ltd
Priority to CN202211240788.4A priority Critical patent/CN115662115A/en
Publication of CN115662115A publication Critical patent/CN115662115A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a purifying and protecting device of highway tunnel monitoring equipment and a control method thereof, wherein the device part comprises an air purifying device, an air supply hose pipeline, a semi-closed enclosure box body, the highway tunnel monitoring equipment and PM 2.5 The monitoring sensor and the air purifying device comprise four layers which are respectively a primary effect filter layer, a middle effect filter layer, a high efficiency filter layer and an axial flow fan layer, external dirty air is filtered by the primary effect filter layer, the middle effect filter layer and the high efficiency filter layer to be clean air on site by starting the axial flow fan, the clean air is orderly delivered to the semi-closed enclosure box body by positive pressure formed by the axial flow fan layer through the air delivery hose pipeline, and the clean air is enabled to orderly flow around the monitoring camera equipmentThe heat generated in the using process of the monitoring camera equipment is quickly discharged out while the cleanliness of the air around the highway tunnel monitoring equipment is ensured.

Description

Purification protection device for expressway tunnel monitoring equipment and control method thereof
Technical Field
The invention relates to the technical field of road protection equipment, in particular to a purification protection device of highway tunnel monitoring equipment and a control method thereof.
Background
In the expressway tunnel, a large amount of pollutants such as vehicle tail gas, smoke dust, oil stain and the like are accumulated in the tunnel to form dirty air due to the reasons of slow speed, poor ventilation condition and the like when automobiles (particularly heavy diesel trucks) enter the tunnel, so that the expressway tunnel camera equipment is exposed in the dirty air environment for a long time. The monitoring camera equipment for the expressway tunnel is exposed in the dirty air for a long time, so that the internal circuit of the monitoring camera equipment is damaged, and the monitoring camera equipment is short-circuited and ignited when serious; and suspended particles, dust particles and oil stains in the dirty air are gathered on the surface of the lens of the monitoring camera equipment, so that the imaging authenticity and resolution of the camera equipment can be seriously reduced. Meanwhile, along with the operation of the monitoring camera equipment for the highway tunnel, particularly in a high-temperature period, the internal temperature of the monitoring camera equipment rises, internal heat accumulation is formed, and hot air is not discharged, so that the aging, the service life and even the fire of the monitoring camera equipment are reduced. Therefore, a set of scientific and universal purifying and protecting device for monitoring camera equipment of the highway tunnel and an intelligent control method thereof need to be established.
Disclosure of Invention
The invention aims to provide a purifying and protecting device of monitoring equipment of an expressway tunnel and a control method thereof, which can solve the problem of floating dust deposition around a lens of monitoring camera equipment; the short circuit and the fire of the internal circuit of the monitoring camera equipment are prevented; meanwhile, the problem of heat dissipation inside the monitoring camera equipment is solved, the aging of elements of the monitoring camera equipment is delayed, and the service life is prolonged.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a purifying and protecting device for monitoring equipment of an expressway tunnel, which comprises
The air purification device is used for purifying air and comprises a primary effect filter layer, a medium effect filter layer, a high effect filter layer and an axial flow fan layer which are sequentially arranged from an inlet to an outlet, and the axial flow fan works to enable positive pressure to be formed in the axial flow fan layer; and
the first end of the air supply hose pipeline is detachably connected with the tail end of the axial flow fan layer; and
the second end of the air supply hose pipeline is detachably connected with a reserved air port on the semi-closed enclosure box body; and
the highway tunnel monitoring equipment is arranged in the semi-closed enclosure box body; and
PM 2.5 monitoring sensor, the PM 2.5 A monitoring sensor arranged in the semi-enclosed enclosure box, wherein the PM 2.5 The monitoring sensor is used for monitoring PM in the semi-closed enclosure box 2.5 Continuously monitoring, the PM 2.5 The monitoring sensor is connected with a controller of the axial flow fan through a line.
In one embodiment, the air purification device further comprises a movable support, the upper part of the movable support is tightly attached to a primary filter screen at the lower part of the primary filter layer through a buckle, the periphery of the primary filter layer is closed, and the primary filter screen is used for isolating outside dirty air; the upper part of the primary filter layer is tightly attached to a middle-effect filter screen at the lower part of the middle-effect filter layer through a buckle, the periphery of the middle-effect filter layer is closed, and the middle-effect filter screen is used for isolating the air of the primary filter layer; well effect filter layer upper portion pass through the buckle with the high-efficient filter screen of high-efficient filter layer lower part is closely laminated, high-efficient filter layer is airtight all around, high-efficient filter screen is used for completely cutting off the air of well effect filter layer.
In one embodiment, the upper part of the high-efficiency filter layer is tightly attached to a mesh-shaped partition plate at the lower part of the axial flow fan layer through a buckle, the axial flow fan is arranged on the upper surface of the mesh-shaped partition plate, and the upper part of the axial flow fan layer is of a four-side slope structure reserved with a thin-wall cylinder air outlet.
In one embodiment, the terminal air outlet of the air purification device is detachably and hermetically connected with the first end of the air supply hose through a first threaded pipe fitting; and the air port reserved on the semi-closed enclosure box body is non-detachably and hermetically connected with a second threaded pipe fitting, and the second end of the air supply hose way is detachably and hermetically connected with the semi-closed enclosure box body through the second threaded pipe fitting.
In one embodiment, the semi-enclosed enclosure box body is composed of four rectangular plates and a square plate reserved with the air opening, a camera of the highway tunnel monitoring equipment is aligned to the opening of the semi-enclosed enclosure box body, and the plate corresponding to the opening of the semi-enclosed enclosure box body is the square plate reserved with the air opening.
In one embodiment, the PM 2.5 The monitoring sensor is arranged at the opening of the semi-closed enclosure box body and is positioned at one side of the highway tunnel monitoring equipment.
The invention also provides a control method of the purification and protection device of the highway tunnel monitoring equipment, which is applied to the purification and protection device of the highway tunnel monitoring equipment and comprises the following steps:
when PM is present 2.5 Monitoring PM measured by a sensor 2.5 When the concentration value is higher than the standard set value, feeding back to a controller of the axial flow fan, and starting the axial flow fan; the rotation of the axial flow fan forms positive pressure, dirty air enters from the bottom of the air purification device and is filtered by the primary filter screen, the purified air is sequentially sent to the intermediate filter layer inside the primary filter layer and is filtered by the intermediate filter screen, the purified air is sequentially sent to the high-efficiency filter layer inside the intermediate filter layer, the clean air obtained by filtering by the high-efficiency filter screen is sequentially sent to the net-shaped partition plate inside the high-efficiency filter layer, and the clean air is sequentially sent to the air supply hose pipeline from the air outlet at the top of the air purification device and is finally sequentially sent to the semi-closed enclosure box body under the action of the fan; clean air of the semi-closed enclosure box body flows around the camera in order under the operation of the highway tunnel monitoring equipment and is discharged from the front end of the camera.
In one embodiment, the PM 2.5 The difference value of the concentration value relative to the standard setting value is matched with the wind speed gear of the axial flow fan, and the larger the difference value is, the larger the corresponding gear is.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to a purifying and protecting device of expressway tunnel monitoring equipment and a control method thereof, wherein the device part comprises an air purifying device, an air supply hose pipeline, a semi-closed enclosure box body, the expressway tunnel monitoring equipment and PM 2.5 The monitoring sensor comprises four layers of primary effect filter layers, intermediate effect filter layers, high-efficiency filter layers and axial flow fan layers, wherein the primary effect filter layers, the intermediate effect filter layers, the high-efficiency filter layers and the axial flow fan layers are respectively arranged on the four layers of air purification devices, external dirty air is filtered by the primary effect filter layers, the intermediate effect filter layers and the high-efficiency filter layers to form on-site clean air, the positive pressure formed by the axial flow fan layers is used for orderly delivering the clean air to the semi-closed enclosure box body through the air supply hose way, so that the clean air orderly flows around the monitoring camera equipment and is discharged from the front end of the camera, and the clean air generated in the using process of the monitoring camera equipment is quickly discharged while the cleanliness of the air around the monitoring camera equipment for the highway tunnel is ensuredHeat.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic overall structure diagram of a purification and protection device of a highway tunnel monitoring device in an embodiment of the invention;
FIG. 2 is a first schematic view showing the connection relationship between an air cleaning device a, a flexible air supply duct b, and a semi-enclosed enclosure box c;
FIG. 3 is a schematic view showing a connection relationship between an air cleaning device a, an air supply hose b and a semi-enclosed enclosure box c;
FIG. 4 is a flow chart of a flow of a purge protection gas flow for a surveillance camera device;
FIG. 5 is a flow chart of an apparatus control method;
wherein, a, an air purification device; b, a flexible air supply pipeline; c, semi-closed enclosure box bodies; d, monitoring equipment for the highway tunnel; ePM 2.5 Monitoring a sensor; f, an axial flow fan; 1, a movable support 1;2, buckling; 3, primary effect filtering net; 4, a primary filter layer; 5, medium-efficiency filter screen; 6, a middle effect filtering layer; 7, high-efficiency filter screen; 8, a high-efficiency filter layer; 9 a mesh separator; 10 axial flow fan layer; 11 a first threaded fitting; 12 a second threaded fitting; 13, glass cement; 14 camera device lens.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide a purifying and protecting device of monitoring equipment of an expressway tunnel and a control method thereof, which can solve the problem of floating dust deposition around a lens of monitoring camera equipment; the short circuit and the fire of an internal circuit of the monitoring camera equipment are prevented; meanwhile, the problem of heat dissipation inside the monitoring camera equipment is solved, the aging of elements of the monitoring camera equipment is delayed, and the service life is prolonged.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
As shown in FIGS. 1 to 5, the present invention provides a purification and protection device for monitoring equipment of highway tunnel, comprising
The air purification device a is used for purifying air and comprises a primary filter layer 4, a secondary filter layer 6, a high-efficiency filter layer 8 and an axial flow fan layer 10 which are sequentially arranged from an inlet to an outlet, and the axial flow fan f works to form positive pressure in the axial flow fan layer 10; and
the first end of the air supply hose pipeline b is detachably connected with the tail end of the axial flow fan layer 10; and
the second end of the air supply hose pipeline b is detachably connected with a reserved air port on the semi-closed enclosure box body c; and
the expressway tunnel monitoring equipment d is arranged in the semi-closed enclosure box body c; and
PM 2.5 monitoring sensors e, PM 2.5 The monitoring sensor e is arranged in the semi-closed enclosure box body c, PM 2.5 The monitoring sensor e is used for monitoring PM in the semi-enclosed enclosure box body c 2.5 Carrying out continuous monitoring of PM 2.5 And the monitoring sensor e is connected with the controller of the axial flow fan f through a line.
The air purification device a comprises four layers, namely an initial effect filter layer 4, an intermediate effect filter layer 6, a high-efficiency filter layer 8 and an axial flow fan layer 10, wherein external dirty air is filtered by the initial effect, the intermediate effect and the high-efficiency three layers to form on-site clean air through starting the axial flow fan f, the positive pressure formed by the axial flow fan layer sends the clean air to a semi-closed enclosure box body c orderly through an air supply hose channel b, so that the clean air flows orderly around the monitoring camera equipment and is discharged from the front end of a camera, and the heat generated in the using process of the monitoring camera equipment is rapidly discharged while the cleanliness of the air around the monitoring camera equipment d is ensured.
In one embodiment, the air purification device a further comprises a movable support 1, the upper part of the movable support 1 is tightly attached to a primary filter screen 3 at the lower part of a primary filter layer 4 through a buckle 2, glass cement is arranged in the attaching layer, the periphery of the primary filter layer 4 is closed, and the lower primary filter screen 3 isolates outside dirty air; the upper part of the primary filter layer 4 is tightly attached to the middle-effect filter screen 5 at the lower part of the middle-effect filter layer 6 through the buckle 2, glass cement is arranged in the attaching layer, the periphery of the middle-effect filter layer 6 is closed, and the middle-effect filter screen 5 at the lower part isolates the air of the primary filter layer 4; the upper part of the middle effect filtering layer 6 is tightly attached to the high effect filtering net 7 at the lower part of the high effect filtering layer 8 through the buckle 2, the glass cement is arranged in the attaching layer, the periphery of the high effect filtering layer 8 is closed, and the air of the middle effect filtering layer 6 is isolated by the high effect filtering net 7 at the lower part; 8 upper portions of high-efficient filter layer closely laminate through buckle 2 and the netted baffle 9 of axial fan layer 10 lower part, and the laminating is the built-in glass of layer and is glued, and axial fan f has been put to netted baffle upper surface, and axial fan layer 10 upper portion is the four sides slope formula structure of reserving the thin wall drum air outlet.
In one embodiment, the thin-wall cylinder air outlet of the air purification device a is detachably and hermetically connected with an air supply hose channel b through a first threaded pipe fitting 11, a second threaded pipe fitting 12 is detachably and hermetically connected with a circular air outlet reserved in a semi-closed enclosure body c through glass cement 13, and the air supply hose channel b is detachably and hermetically connected with the semi-closed enclosure body c through the second threaded pipe fitting 12.
In one embodiment, the semi-enclosed enclosure box c is composed of four rectangular plates and a square plate reserved with a circular air port, and movable expressway tunnel monitoring equipment d and PM are arranged in the semi-enclosed enclosure box c 2.5 The sensor e is monitored. The camera of the expressway tunnel monitoring equipment d is aligned to the opening of the semi-closed enclosure box body c, and the plate corresponding to the opening of the semi-closed enclosure box body c is a square plate with a reserved air opening.
In one embodiment, a PM is arranged on one side of the enclosure wall surface close to the lens 14 of the camera equipment in a semi-enclosed enclosure body c 2.5 Monitoring sensor e for PM in semi-enclosed enclosure box c 2.5 Continuously monitoring, connecting the sensor e with the controller of the axial flow fan f through a line, and when PM 2.5 PM measured by monitoring sensor e 2.5 When the concentration value is higher than the standard set value, feeding back to the controller of the axial flow fan f, starting the axial flow fan f, and PM 2.5 The difference value of the concentration value relative to the standard setting value is matched with the wind speed gear of the axial flow fan f, and the larger the difference value is, the larger the gear is, the larger the wind speed of the supplied air is.
The invention also provides a control method of the purification and protection device of the highway tunnel monitoring equipment, which is applied to the purification and protection device of the highway tunnel monitoring equipment and comprises the following steps:
when PM 2.5 PM measured by monitoring sensor e 2.5 When the concentration value is higher than a standard set value, the concentration value is fed back to a controller of the axial flow fan f, the axial flow fan f is started, positive pressure is formed by rotation of the axial flow fan f, dirty air enters from the bottom of the air purification device a, is filtered through the primary filter screen 3, the purified air is sequentially sent to the intermediate filter layer 6 inside the primary filter layer 4 and is filtered through the intermediate filter screen 5, the purified air is sequentially sent to the high-efficiency filter layer 8 inside the intermediate filter layer 6, the clean air obtained by filtering through the high-efficiency filter screen 7 is sequentially sent to the net-shaped partition plate 9 inside the high-efficiency filter layer 8, and under the action of the fan, the clean air is sequentially sent to the hose duct b from an air outlet of the thin-wall cylinder at the top of the air purification device a and is finally sent to the semi-closed enclosure box body c. Clean air of the semi-closed enclosure box body c flows around the camera orderly under the operation of the expressway tunnel monitoring equipment d, is discharged from the front end of the camera, and positive pressure air mass is formed by the clean air, so that pollutants such as dust, smog, gaseous oil stains and the like cannot be close to the lens of the camera, and meanwhile, the heat generated by the monitoring camera equipment can be reduced due to the flowing of air flow. Therefore, a controllable device capable of purifying and protecting the highway tunnel monitoring equipment is formed.
By adopting the device and the control method thereof, the dirty air of the highway tunnel is filtered and purified by three layers to form clean air, the clean air is orderly sent to the monitoring camera equipment by the axial flow fan f, the clean air flows around the camera in order and is discharged by the front end of the camera, and a positive pressure air mass is formed by the clean air, so that pollutants such as dust, smog, gaseous oil stain and the like can not be close to the lens of the camera equipment, meanwhile, the flowing of the air flow can reduce the heat generated by the monitoring camera equipment, the camera equipment is kept in a clean and suitable temperature environment all the time, the short circuit and the fire of an internal circuit of the monitoring camera equipment are effectively prevented, the aging of elements of the monitoring camera equipment is delayed, and the service life of the monitoring camera equipment is prolonged.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (8)

1. Highway tunnel supervisory equipment purifies protector, its characterized in that: comprises that
The air purification device is used for purifying air and comprises a primary filter layer, a medium filter layer, a high-efficiency filter layer and an axial flow fan layer which are sequentially arranged from an inlet to an outlet, and the axial flow fan works to enable positive pressure to be formed in the axial flow fan layer; and
the first end of the air supply hose pipeline is detachably connected with the tail end of the axial flow fan layer; and
the second end of the air supply hose pipeline is detachably connected with a reserved air port on the semi-closed enclosure box body; and
the highway tunnel monitoring equipment is arranged in the semi-closed enclosure box body; and
PM 2.5 monitoring sensor, the PM 2.5 A monitoring sensor arranged in the semi-enclosed enclosure, wherein the PM 2.5 The monitoring sensor is used for monitoring PM in the semi-closed enclosure box 2.5 Continuously monitoring, the PM 2.5 The monitoring sensor is connected with a controller of the axial flow fan through a line.
2. The highway tunnel monitoring equipment purifies protector of claim 1, characterized in that: the air purification device also comprises a movable support, the upper part of the movable support is tightly attached to a primary filter screen at the lower part of the primary filter layer through a buckle, the periphery of the primary filter layer is closed, and the primary filter screen is used for isolating outside dirty air; the upper part of the primary filter layer is tightly attached to an intermediate filter screen at the lower part of the intermediate filter layer through a buckle, the periphery of the intermediate filter layer is closed, and the intermediate filter screen is used for isolating the air of the primary filter layer; the middle effect filter layer upper portion pass through the buckle with the high-efficient filter screen of high-efficient filter layer lower part closely laminates, high-efficient filter layer is airtight all around, high-efficient filter screen is used for completely cutting off the air of middle effect filter layer.
3. The highway tunnel monitoring equipment purifies protector of claim 2, characterized in that: the upper part of the high-efficiency filter layer is tightly attached to a mesh partition plate at the lower part of the axial flow fan layer through a buckle, the axial flow fan is arranged on the upper surface of the mesh partition plate, and the upper part of the axial flow fan layer is of a four-side slope structure with a reserved thin-wall cylinder air outlet.
4. The highway tunnel monitoring equipment purifies protector of claim 1, characterized in that: the tail end air outlet of the air purification device is detachably and hermetically connected with the first end of the air supply hose pipeline through a first threaded pipe fitting; and the air port reserved on the semi-closed enclosure box body is non-detachably and hermetically connected with a second threaded pipe fitting, and the second end of the air supply hose way is detachably and hermetically connected with the semi-closed enclosure box body through the second threaded pipe fitting.
5. The highway tunnel monitoring equipment purifies protector of claim 1, characterized in that: the semi-closed enclosure box body is composed of four rectangular plate pieces and a square plate piece with the air opening reserved, a camera of the highway tunnel monitoring equipment is aligned to the opening of the semi-closed enclosure box body, and the plate piece corresponding to the opening of the semi-closed enclosure box body is the square plate piece with the air opening reserved.
6. The highway tunnel monitoring equipment purifies protector of claim 5, characterized in that: the PM 2.5 The monitoring sensor is arranged at the opening of the semi-enclosed enclosure box body and is positioned at one side of the highway tunnel monitoring equipment.
7. The control method of the purification and protection device for the expressway tunnel monitoring equipment is applied to the purification and protection device for the expressway tunnel monitoring equipment as claimed in any one of claims 1 to 6, and is characterized by comprising the following steps of:
when PM 2.5 Monitoring PM measured by a sensor 2.5 When the concentration value is higher than the standard set value, feeding back to a controller of the axial flow fan, and starting the axial flow fan; the rotation of the axial flow fan forms positive pressure and dirtAir enters from the bottom of the air purification device and is filtered by the primary filter screen, the purified air is sequentially sent to the intermediate filter layer in the primary filter layer and is filtered by the intermediate filter screen, the purified air is sequentially sent to the high-efficiency filter layer in the intermediate filter layer, the clean air obtained by filtering by the high-efficiency filter screen is sequentially sent to the net-shaped partition plate in the high-efficiency filter layer, and the clean air is sequentially sent to the air supply hose passage from the air outlet at the top of the air purification device under the action of the fan and is finally sequentially sent to the semi-closed enclosure box body; clean air of the semi-closed enclosure box body flows around the camera orderly under the operation of the highway tunnel monitoring equipment and is discharged from the front end of the camera.
8. The control method of the purification and protection device of the highway tunnel monitoring equipment according to claim 7, characterized in that: the PM 2.5 The difference value of the concentration value relative to the standard setting value is matched with the wind speed gear of the axial flow fan, and the larger the difference value is, the larger the corresponding gear is.
CN202211240788.4A 2022-10-11 2022-10-11 Purification protection device for expressway tunnel monitoring equipment and control method thereof Pending CN115662115A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211240788.4A CN115662115A (en) 2022-10-11 2022-10-11 Purification protection device for expressway tunnel monitoring equipment and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211240788.4A CN115662115A (en) 2022-10-11 2022-10-11 Purification protection device for expressway tunnel monitoring equipment and control method thereof

Publications (1)

Publication Number Publication Date
CN115662115A true CN115662115A (en) 2023-01-31

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ID=84988170

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211240788.4A Pending CN115662115A (en) 2022-10-11 2022-10-11 Purification protection device for expressway tunnel monitoring equipment and control method thereof

Country Status (1)

Country Link
CN (1) CN115662115A (en)

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