An indoor / outdoor circulating ventilation device and ventilation method for building engineering

Abstract

This invention discloses an indoor / outdoor circulating ventilation device and its ventilation method for building engineering, relating to the field of building ventilation technology. It includes: an outer casing; an inner filter device, which is slidably installed inside the outer casing; a lower exhaust device, which is detachably fixed to the bottom opening of the inner filter device and contacts the inner filter device; and a top cover assembly, which is detachably fixed to the top opening of the outer casing and contacts the inner filter device. This invention, through the dust removal component, can discharge the dust filtered by the inner filter device, allowing the dust-clogged inner filter device to be properly unblocked. When the inner filter device is unblocked, it does not need to be disassembled, and the fan continues to operate normally without affecting the normal use of the equipment. It also allows for the cleaning of clogged filters at any time.

Description

Technical Field

[0001] This invention relates to the field of building ventilation technology, and in particular to an indoor and outdoor circulating ventilation device and ventilation method for building engineering. Background Technology

[0002] In building construction, indoor and outdoor circulating ventilation systems are often used to achieve air circulation and maintain indoor air quality. These systems can be implemented through natural ventilation or mechanical ventilation. When designing such systems, it is necessary to consider the building's structure and layout, as well as factors such as indoor and outdoor temperature and humidity. By controlling the air circulation between indoors and outdoors, indoor air quality can be effectively improved, thereby enhancing the comfort of the living and working environment.

[0003] Currently, due to changes in location and weather, construction projects often have a large amount of dust in the air. Outdoor dust is difficult to remove due to the influence of external airflow and will enter the building with the airflow.

[0004] Chinese patent document CN202110028668.7 discloses a building indoor air ventilation, purification and humidification device: when the equipment stops running, the dust removal component is flipped outward and attached to the inner wall of the right end of the air duct by the torsion of the torsion spring, thereby blocking the air inlet at the right end of the air duct and preventing dust in the air from entering when the equipment is turned off, thus maintaining the effective purification capacity of the filter device.

[0005] The aforementioned indoor air ventilation, purification, and humidification device requires the equipment to be stopped during cleaning, which limits the cleaning time and duration. It cannot be cleaned in a timely manner after the filter is clogged, and the indoor air quality cannot be maintained during cleaning. Summary of the Invention

[0006] This invention provides an indoor and outdoor circulating ventilation device and ventilation method for building engineering, which solves the problems in the prior art that require the equipment to be stopped during cleaning, thus limiting the cleaning time and duration, making it impossible to clean the filter device in a timely manner after it becomes clogged, and also failing to maintain indoor air quality during cleaning.

[0007] The technical problem solved by this invention is achieved by the following technical solution:

[0008] An indoor / outdoor circulating ventilation device and ventilation method for building engineering, comprising:

[0009] outer shell;

[0010] An internal filter device, which is slidably installed inside the outer casing;

[0011] A lower exhaust device is detachably fixed at the bottom opening of the inner filter device and in contact with the inner filter device.

[0012] A top cover assembly, which is detachably fixed to the top opening of the housing and contacts the inner filter device;

[0013] A high-pressure blower, which is fixed to the air inlet of the top cover assembly;

[0014] A dust removal assembly, which is mounted on the lower exhaust device and the internal filter device;

[0015] A pneumatic telescopic rod, the two ends of which are fixedly connected to the inner filter device and the top cover assembly, respectively;

[0016] A pipe fitting, which is fixed to the top of the pneumatic telescopic rod and extends above the top cover assembly;

[0017] A limiting device is installed inside the housing and limits the height of the internal filter device.

[0018] Optionally, the internal filtration device includes:

[0019] The filter screen is disposed inside the housing.

[0020] A lower adjustment component, which is fixed to the bottom of the filter screen;

[0021] An upper sealing ring is detachably fixed to the top of the filter screen;

[0022] A sealing gasket is bonded to the top of the upper sealing ring and contacts the top cover assembly.

[0023] Optionally, the lower adjustment element includes;

[0024] A sealing sleeve, which is fixed to the top of the filter screen;

[0025] The first magnet, of which there are multiple, is fixed at the bottom of the sealing sleeve in a ring array;

[0026] Fan blades, multiple of which are fixed in a ring array on the outside of the sealing sleeve and connected to the pneumatic telescopic rod;

[0027] The first pressure sensor is mounted on the top of the fan blade plate.

[0028] Optionally, the lower exhaust device includes:

[0029] The bottom plate is fixed to the bottom opening of the outer casing:

[0030] A sealing ring, which is fixed to the top of the lower base plate and contacts the outer casing;

[0031] The exhaust vents are provided in multiple form and arranged in a ring on the bottom plate and the sealing ring, forming a structure in which the exhaust vents are opened after the fan blades descend.

[0032] The second magnet is fixed to the top of the bottom plate and repels the first magnet.

[0033] Optionally, the top cover assembly includes:

[0034] A top cover plate, which is detachably fixed to the top opening of the housing and contacts the sealing gasket;

[0035] An air inlet duct is fixed to the top of the top cover plate and sleeved on the outside of the high-pressure blower.

[0036] A receiving ring, which is fixed inside the air inlet duct and fixedly connected to the high-pressure blower;

[0037] The upper sealing element is fixed inside the air inlet duct.

[0038] Optionally, the upper sealing element includes:

[0039] A support plate, which is fixed to the bottom opening of the air inlet duct;

[0040] A hanger rod, which is fixed to the bottom of the frame and extends into the interior of the filter screen;

[0041] A sealing plate is fixed to the bottom of the suspension rod, forming a structure in which the sealing plate contacts the upper sealing ring after the filter screen descends, thus sealing the upper sealing ring.

[0042] Optionally, the dust removal assembly includes:

[0043] Dust exhaust pipe, which is fixed inside the bottom plate and inserted upward into the inside of the sealing sleeve;

[0044] The air guide channel is provided in a ring array on the dust exhaust pipe, forming a structure in which the air guide channel is connected to the filter screen after the filter screen descends;

[0045] The upper plate is fixed to the top of the dust exhaust pipe and located inside the sealing sleeve;

[0046] The second pressure sensor is fixed to the top of the upper plate.

[0047] Optionally, the limiting device includes:

[0048] The plug-in slots are provided in multiples and arranged in a circular array on the inner wall of the outer casing;

[0049] A limiting head is slidably installed inside the insertion slot and limits the height of the fan blade plate;

[0050] A compression spring, the two ends of which are fixedly connected to the inner wall of the insertion slot and the limiting head, respectively.

[0051] Optional, the following steps may be included:

[0052] Step 1: During ventilation, start the high-pressure fan. The airflow enters the filter screen through the inlet duct, is filtered by the filter screen, flows to the outside of the filter screen, and is discharged through the exhaust vent.

[0053] Step 2: When adjusting the wind direction, the pneumatic telescopic rod drives the filter screen to descend, causing the filter screen to drive the fan blades to descend and block the exhaust vent. It also causes the upper sealing ring to contact and seal with the sealing plate, moves the sealing gasket away from the top cover plate, and connects the air guide channel with the filter screen.

[0054] Step 3: During the self-cleaning process, airflow enters the interior of the outer casing through the air inlet duct, cleans the filter, and carries dust through the air guide channel into the dust exhaust duct, where the dust is then discharged.

[0055] Step 4: Adjust to normal emission state. The repulsive force between the second magnet and the first magnet causes the filter screen to rise, which in turn causes the fan blades to open the exhaust vent. This causes the upper sealing ring to move away from the sealing plate and the sealing gasket to contact and seal with the top cover plate. This moves the air guide channel into the interior of the sealing sleeve, and the sealing sleeve seals the air guide channel.

[0056] The beneficial effects of this invention are:

[0057] The dust removal component can discharge the dust filtered by the internal filter, allowing the internal filter to be unblocked. When the internal filter is unblocked, it does not need to be disassembled and the fan can continue to operate normally without affecting the normal use of the equipment. The clogged filter can be cleaned at any time.

[0058] By setting up the fan blades, the exhaust vents can be blocked when the filter screen becomes clogged and falls down, changing the airflow and causing the airflow to change its path to clean the filter screen.

[0059] The sealing plate seals the top of the filter screen as it descends, preventing airflow from directly entering the interior of the filter screen and allowing airflow to enter from the outside. Attached Figure Description

[0060] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0061] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0062] Figure 2 This is a schematic diagram of the filter screen in the self-cleaning state of the present invention;

[0063] Figure 3 This is a schematic diagram of the filter screen's filtration state according to the present invention;

[0064] Figure 4 This is a schematic diagram of the limiting device structure of the present invention;

[0065] Figure 5 This is a schematic diagram of the sealing sleeve structure of the present invention;

[0066] Figure 6 This is a schematic diagram of the dust removal component structure of the present invention;

[0067] Figure 7 This is a schematic diagram of the sealing component structure of the present invention.

[0068] In the diagram: 100, outer shell;

[0069] 200. Internal filtration device; 210. Filter screen; 220. Lower adjustment component; 221. Sealing sleeve; 222. First magnet; 223. Fan blade; 224. First air pressure sensor; 230. Upper sealing ring; 240. Sealing gasket;

[0070] 300. Lower exhaust device; 310. Lower base plate; 320. Sealing ring; 330. Exhaust vent; 340. Second magnet;

[0071] 400. Top cover assembly; 410. Top cover plate; 420. Air inlet duct; 430. Receiving ring; 440. Upper sealing component; 441. Frame plate; 442. Hanger rod; 443. Sealing plate;

[0072] 500. High-pressure blower;

[0073] 600. Dust extraction assembly; 610. Dust extraction duct; 620. Air guide channel; 630. Upper plate; 640. Second air pressure sensor;

[0074] 700. Pneumatic telescopic rod;

[0075] 800. Pipe fittings;

[0076] 900, Limiting device; 910, Insertion slot; 920, Limiting head; 930, Compression spring. Detailed Implementation

[0077] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0078] Reference Figure 1-7 The above describes an indoor / outdoor circulating ventilation device and ventilation method for building engineering, comprising:

[0079] 100 for the outer casing;

[0080] An internal filter device 200 is installed inside the outer casing 100 and can slide up and down.

[0081] The lower exhaust device 300 is detachably fixed at the bottom opening of the inner filter device 200 and contacts the inner filter device 200.

[0082] Top cover assembly 400 is detachably fixed to the top opening of the housing 100 and contacts the inner filter device 200.

[0083] High-pressure blower 500, the high-pressure blower 500 is fixed to the air inlet of the top cover assembly 400;

[0084] Dust removal assembly 600 is installed on the lower exhaust device 300 and the internal filter device 200;

[0085] The pneumatic telescopic rod 700 has two ends that are fixedly connected to the internal filter device 200 and the top cover assembly 400, respectively.

[0086] Pipe fitting 800 is fixed to the top of pneumatic telescopic rod 700 and extends above top cover assembly 400;

[0087] The limiting device 900 is installed inside the housing 100 and limits the height of the internal filter device 200.

[0088] The dust removal component 600 can discharge the dust filtered by the internal filter 200, so that the internal filter 200 blocked by dust can be unblocked normally. When the internal filter 200 is unblocked, it does not need to be disassembled and the fan 500 can be kept running normally. It will not affect the normal use of the equipment and can clean the blocked filter at any time.

[0089] The high-pressure blower 500 ensures normal airflow, and the high-pressure blower 500 generates a large airflow velocity, which can generate a large pressure when the internal filter device 200 is blocked, thus ensuring the normal adjustment of the internal filter device 200.

[0090] The pneumatic telescopic rod 700 is used to push the internal filter device 200 downward when gas is introduced. The pipe joint 800 is connected to the air pump pipe, so that the air pump fills the interior of the pneumatic telescopic rod 700 with gas.

[0091] In some embodiments of the present invention, reference is made to... Figure 3 As shown, the internal filtration device 200 includes:

[0092] Filter 210 is disposed inside the outer casing 100.

[0093] The lower adjustment component 220 is fixed to the bottom of the filter screen 210;

[0094] Upper sealing ring 230 is detachably fixed to the top of filter screen 210;

[0095] Sealing gasket 240 is bonded to the top of upper sealing ring 230 and contacts top cover assembly 400.

[0096] The filter 210 filters the flowing air, preventing dust from entering the room and affecting indoor air quality, thus ensuring the comfort of the living and working environment.

[0097] The sealing gasket 240 ensures the airtightness between the upper sealing ring 230 and the top cover assembly 400, and ensures that air will first enter the interior of the filter screen 210 for filtration before the filter screen 210 descends.

[0098] The upper sealing ring 230 is used to seal the top of the filter screen 210, allowing airflow to enter the interior of the filter screen 210 through the upper sealing ring 230, and ensuring the proper adhesion and fixation of the sealing gasket 240.

[0099] In some embodiments of the present invention, reference is made to... Figure 4 and Figure 5 As shown, the lower adjustment member 220 includes;

[0100] Sealing sleeve 221, sealing sleeve 221 is fixed to the top of filter screen 210;

[0101] Multiple first magnets 222 are provided and fixed to the bottom of the sealing sleeve 221 in a ring array;

[0102] Fan blade 223, multiple fan blades 223 are provided and fixed on the outside of the sealing sleeve 221 in a ring array and connected to the pneumatic telescopic rod 700.

[0103] The first pressure sensor 224 is mounted on the top of the fan blade plate 223.

[0104] The bottom of the filter screen 210 is sealed by the sealing sleeve 221, so that the gas inside the filter screen 210 flows according to a preset path.

[0105] When the filter screen 210 is sealed, the air pressure between the filter screen 210 and the outer casing 100 will decrease. When the air pressure decreases to a certain level, it will trigger the first air pressure sensor 224, causing the first air pressure sensor 224 to open the pneumatic telescopic rod 700, allowing the gas inside the pneumatic telescopic rod 700 to be discharged normally. The first air pressure sensor 224 is an existing publicly available air pressure sensor.

[0106] In some embodiments of the present invention, reference is made to... Figure 6 As shown, the lower exhaust device 300 includes:

[0107] The lower base plate 310 is fixed to the bottom opening of the outer casing 100.

[0108] A sealing ring 320 is fixed to the top of the lower base plate 310 and contacts the outer casing 100.

[0109] Multiple exhaust vents 330 are provided and arranged in a ring array on the lower base plate 310 and the sealing ring 320, forming a structure in which the fan blade plate 223 lowers and exhausts the vents 330.

[0110] The second magnet 340 is fixed to the top of the lower base plate 310 and repels the first magnet 222.

[0111] The fan blade plate 223 can block the exhaust hole 330 when the filter screen 210 is blocked and falls, changing the airflow and causing the airflow to change its defense line to clean the filter screen 210. After the fan blade plate 223 releases the blockage of the exhaust hole 330, the gas will be discharged into the room through the exhaust hole 330.

[0112] The bottom plate 310 and sealing ring 320 are used to seal the filter screen 210 after it becomes clogged and falls down, so that the gas can only pass through the filter screen 210 and be discharged from the dust removal assembly 600, and the filter screen 210 can be cleaned.

[0113] Specifically, the second magnet 340, in conjunction with the first magnet 222, is configured to push the filter screen 210 back to its original position and normal operation when the internal pressure of the pneumatic telescopic rod 700 decreases.

[0114] In some embodiments of the present invention, reference is made to... Figure 2 and Figure 3 As shown, the top cover assembly 400 includes:

[0115] Top cover plate 410 is detachably fixed to the top opening of the housing 100 and contacts the sealing gasket 240.

[0116] Air inlet duct 420 is fixed to the top of top cover plate 410 and sleeved on the outside of high pressure fan 500.

[0117] The receiving ring 430 is fixed inside the air inlet duct 420 and is fixedly connected to the high-pressure blower 500.

[0118] Upper sealing component 440 is fixed inside the air inlet duct 420.

[0119] The top of the outer casing 100 is sealed by the top cover plate 410 and the sealing gasket 240 is squeezed so that the sealing gasket 240 ensures the seal between the top cover plate 410 and the upper sealing ring 230.

[0120] The air inlet duct 420 ensures normal air intake, while the receiving ring 430 ensures proper installation and fixation of the high-pressure blower 500, enabling the high-pressure blower 500 to drive airflow normally.

[0121] In some embodiments of the present invention, reference is made to... Figure 7 As shown, the upper sealing element 440 includes:

[0122] Mounting plate 441 is fixed at the bottom opening of the air inlet duct 420;

[0123] Hanger 442 is fixed to the bottom of the frame plate 441 and extends into the interior of the filter screen 210;

[0124] The sealing plate 443 is fixed to the bottom of the hanger 442, forming a structure in which the sealing plate 443 contacts the upper sealing ring 230 after the filter screen 210 descends, thus sealing the upper sealing ring 230.

[0125] The installation and fixation of the sealing plate 443 are ensured by the cooperation of the frame plate 441 and the hanging rod 442, and the position of the sealing plate 443 is ensured so that the sealing plate 443 can slide relative to the filter screen 210 when the filter screen 210 is raised and lowered.

[0126] The sealing plate 443 seals the top of the filter screen 210 when it descends, preventing airflow from directly entering the interior of the filter screen 210 and allowing airflow to enter from the outside of the filter screen 210.

[0127] In some embodiments of the present invention, reference is made to... Figure 6 As shown, the dust extraction assembly 600 includes:

[0128] Dust exhaust pipe 610 is fixed inside the bottom plate 310 and inserted upward into the sealing sleeve 221;

[0129] Multiple air guide channels 620 are provided on the dust discharge pipe 610 in a ring array, forming a structure in which the air guide channels 620 are connected to the filter screen 210 after the filter screen 210 descends.

[0130] The upper plate 630 is fixed to the top of the dust discharge pipe 610 and is located inside the sealing sleeve 221;

[0131] The second pressure sensor 640 is fixed to the top of the upper plate 630.

[0132] The dust exhaust pipe 610 and the air guide channel 620 are designed to work together to discharge the dust blown down after the filter screen 210 descends. The outlet of the dust exhaust pipe 610 is equipped with a U-shaped pipe with multiple filter holes. This allows some of the incoming air to carry the dust out and some air to enter the room. The outlet of the dust exhaust pipe 610 can also be fitted with a filter bag. After the air and dust enter the filter bag, the dust will remain inside the filter bag, and the air will enter the room. After the filter screen 210 is cleaned, the filter bag can be removed and cleaned.

[0133] The upper plate 630 is fitted with the sealing sleeve 221 to form a seal, preventing gas from entering the dust discharge pipe 610 and being discharged when the filter screen 210 is in normal use.

[0134] When the filter screen 210 becomes clogged, the air pressure inside the filter screen 210 will increase. When the air pressure is high enough, it will trigger the second air pressure sensor 640, which will start the air pump to fill the pneumatic telescopic rod 700 with gas. This will cause the pneumatic telescopic rod 700 to extend under the action of air pressure, thus moving the filter screen 210.

[0135] In some embodiments of the present invention, reference is made to... Figure 4 As shown, the limiting device 900 includes:

[0136] Multiple insertion slots 910 are provided and arranged in a circular array on the inner wall of the outer casing 100.

[0137] The limiting head 920 is slidably installed inside the insertion slot 910 and limits the height of the fan blade plate 223;

[0138] Compression spring 930, with its two ends fixedly connected to the inner wall of insertion groove 910 and limit head 920 respectively.

[0139] The insertion slot 910 provides space for the installation of the limiting head 920 and the compression spring 930;

[0140] The limiting head 920 limits the fan blade 223, so that the pneumatic telescopic rod 700 can only push the fan blade 223 to move after a certain amount of gas is filled in. At the same time, it can also prevent the filter screen 210 from jumping up and down under the action of airflow during normal filtration, which would affect the sealing effect of the sealing gasket 240. It also prevents gas from being discharged through the exhaust hole 330 without being filtered when the filter screen 210 is not blocked.

[0141] The compression spring 930 is installed so that the limiting head 920 is compressed after the squeezing force reaches a certain level, causing the limiting head 920 to move into the insertion groove 910.

[0142] In some embodiments of the present invention, when this device is used in mines or large workshops, a high-pressure blower 500 is required to provide a large air force. Under a large air force, when the filter screen 210 is clogged, the air force pushes the filter screen 210 to move normally. The pneumatic telescopic rod 700 can be replaced with a tension spring, so that when the filter screen 210 is clogged, it moves under the action of air pressure and stretches the tension spring. After the filter screen 210 is unblocked, the stretching causes the filter screen 210 to reset. At the same time, the limiting head 920 can limit the position of the filter screen 210, preventing the filter screen 210 from rising and opening the exhaust vent 330 immediately after being cleaned. After the filter screen 210 has finished self-cleaning, the tension of the tension spring is greater than the limiting force of the limiting head 920 and the resistance force of the air pressure, so that the filter screen 210 resets.

[0143] In some embodiments of the present invention, the following steps are included:

[0144] Step 1: During ventilation, start the high-pressure fan 500. The airflow enters the interior of the filter screen 210 through the air inlet duct 420, is filtered by the filter screen 210, flows to the outside of the filter screen 210, and is discharged through the exhaust vent 330.

[0145] Step 2: When adjusting the wind direction, the pneumatic telescopic rod 700 drives the filter screen 210 to descend, causing the filter screen 210 to drive the fan blade 223 to descend and block the exhaust hole 330. It also causes the upper sealing ring 230 to contact and seal with the sealing plate 443, causing the sealing gasket 240 to move away from the top cover plate 410, and connecting the air guide channel 620 with the filter screen 210.

[0146] Step 3: When the filter screen 210 is self-cleaning, the airflow enters the interior of the outer casing 100 through the air inlet duct 420 and cleans the filter screen 210. The airflow enters the interior of the filter screen 210 and carries the dust through the air guide channel 620 into the interior of the dust exhaust duct 610, and carries the dust out.

[0147] Step 4: Adjust to normal emission state. The repulsive force between the second magnet 340 and the first magnet 222 causes the filter screen 210 to rise, which in turn causes the fan blade 223 to open the exhaust vent 330. This causes the upper sealing ring 230 to move away from the sealing plate 443, and causes the sealing gasket 240 to come into contact with the top cover plate 410 for sealing. This causes the air guide channel 620 to move into the interior of the sealing sleeve 221, so that the sealing sleeve 221 seals the air guide channel 620.

[0148] The working method of this invention:

[0149] When in use, start the high-pressure blower 500. The high-pressure blower 500 generates wind power to drive air into the interior of the filter screen 210 and filter it through the filter screen 210. After filtration, the air will be discharged into the room through the exhaust vent 330, and the dust will remain inside the filter screen 210.

[0150] When the filter screen 210 becomes clogged, the air pressure inside the filter screen 210 increases and is sensed by the second air pressure sensor 640, which controls the air pump to start and fill the pneumatic telescopic rod 700 with gas. This causes the pneumatic telescopic rod 700 to extend and retract, which in turn causes the fan blade 223, filter screen 210, sealing sleeve 221, sealing gasket 240, and upper sealing ring 230 to descend. The fan blade 223 descends to block the exhaust vent 330, and the sealing gasket 240 and upper sealing ring 230 descend away from the top cover plate 410. As the upper sealing ring 230 descends, it comes into contact with the sealing plate 443, blocking the upper sealing ring 230. When the sealing sleeve 221 descends, it extends the dust exhaust pipe 610 into the interior of the filter screen 210 and connects the air guide channel 620 with the filter screen 210.

[0151] The high-pressure blower 500 will drive the gas into the interior of the outer casing 100, and through the filter holes of the filter screen 210 to clean the filter holes of the filter screen 210. The air will then carry the dust through the air guide channel 620 into the dust discharge pipe 610 and be discharged.

[0152] When the filter screen 210 self-cleans, the air pressure inside the outer casing 100 will drop and be sensed by the first air pressure sensor 224. The first air pressure sensor 224 controls the pneumatic telescopic rod 700 to open and the air pump to close. The filter screen 210 is reset under the repulsive force between the first magnet 222 and the second magnet 340, opening the exhaust vent 330 and the upper sealing ring 230, blocking the air guide channel 620, and causing the sealing gasket 240 to be squeezed against the top cover plate 410.

[0153] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An indoor and outdoor circulation ventilation device for construction work, characterized by, The utility model relates to a building engineering indoor and outdoor circulation ventilation device, including: The outer shell (100); The inner filter device (200) is slidably installed in the inside of outer shell (100); The lower exhaust device (300) is detachably fixed at the bottom opening of inner filter device (200) and is in contact with inner filter device (200); The top cover assembly (400) is detachably fixed at the top opening of outer shell (100) and is in contact with inner filter device (200); The high pressure fan (500) is fixed at the top air inlet of top cover assembly (400); The dust removal assembly (600) is installed on lower exhaust device (300) and inner filter device (200); The pneumatic telescopic rod (700) is fixedly connected with inner filter device (200) and top cover assembly (400) respectively at both ends; The pipe joint (800) is fixed at the top of pneumatic telescopic rod (700) and extends above top cover assembly (400); The limiting device (900) is installed in the inside of outer shell (100) and limits the height of inner filter device (200); The inner filter device (200) includes: The filter screen (210) is arranged in the inside of outer shell (100); The lower adjusting piece (220) is fixed at the bottom of filter screen (210); The upper blocking ring (230) is detachably fixed at the top of filter screen (210); The sealing gasket (240) is bonded at the top of upper blocking ring (230) and is in contact with top cover assembly (400); The dust removal assembly (600) includes: The dust removal pipeline (610) is fixed in the inside of lower bottom plate (310) and is inserted into the inside of sealing sleeve (221) upwards; The air guide channel (620) is arranged in the form of annular array on dust removal pipeline (610) and is communicated with filter screen (210) after the descending of filter screen (210); The upper plate (630) is fixed at the top of dust removal pipeline (610) and is located in the inside of sealing sleeve (221); The second air pressure sensor (640) is fixed at the top of upper plate (630).

2. The building engineering indoor and outdoor circulation ventilation device according to claim 1, wherein: The lower adjusting piece (220) includes: The sealing sleeve (221) is fixed at the top of filter screen (210); The first magnet (222) is arranged in the form of annular array at the bottom of sealing sleeve (221). Fan blade (223), provided with a plurality of, and annular array fixed in the outer side of the sealing sleeve (221), and connected with the pneumatic telescopic rod (700); First air pressure sensor (224), installed at the top of the fan blade (223).

3. The indoor and outdoor circulation ventilation device for construction engineering according to claim 2, wherein: The lower exhaust device (300) comprises: Lower bottom plate (310), fixed at the bottom opening of the outer shell (100): Sealing ring (320), fixed at the top of the lower bottom plate (310) and in contact with the outer shell (100); Exhaust air through hole (330), provided with a plurality of, and annular array opened on the lower bottom plate (310) and the sealing ring (320), forming the structure of the exhaust air through hole (330) after the fan blade (223) falls; Second magnet (340), fixed at the top of the lower bottom plate (310) and repelling the first magnet (222).

4. The indoor and outdoor circulation ventilation device for construction engineering according to claim 3, wherein: The top cover assembly (400) comprises: Top cover plate (410), detachably fixed at the top opening of the outer shell (100) and in contact with the sealing gasket (240); Air inlet pipeline (420), fixed at the top of the top cover plate (410) and sleeved on the outside of the high-pressure fan (500); Supporting ring (430), fixed inside the air inlet pipeline (420) and fixedly connected with the high-pressure fan (500); Upper blocking piece (440), fixed inside the air inlet pipeline (420).

5. The indoor and outdoor circulation ventilation device for construction engineering according to claim 4, wherein: The upper blocking piece (440) comprises: Frame plate (441), fixed at the bottom opening of the air inlet pipeline (420); Suspender (442), fixed at the bottom of the frame plate (441) and extending into the inside of the filter screen (210); Sealing plate (443), fixed at the bottom of the suspender (442), forming the sealing plate (443) in contact with the upper blocking ring (230) after the filter screen (210) falls and sealing the upper blocking ring (230).

6. The indoor and outdoor circulation ventilation device for construction engineering according to claim 5, wherein: The limiting device (900) comprises: Plug-in slot (910), provided with a plurality of, and annular array opened on the inner wall of the outer shell (100); Limiting head (920), slidably installed inside the plug-in slot (910) and limiting the height of the fan blade (223); The compression spring (930) has two ends fixedly connected with the inner wall of the insertion slot (910) and the limiting head (920) respectively.

7. A ventilation method of a building construction work indoor and outdoor circulation ventilation device, characterized by, The constructional engineering indoor and outdoor circulation ventilation device of claim 6 further comprises the following steps: Step one: when ventilation, start the high-pressure fan (500), the wind force enters into the inside of the filter screen (210) through the air inlet pipe (420), and is filtered by the filter screen (210) to flow to the outside of the filter screen (210), and is discharged through the air outlet hole (330); Step two: when adjusting the wind direction, the pneumatic telescopic rod (700) drives the filter screen (210) to descend, so that the filter screen (210) drives the fan blade (223) to descend to block the air outlet hole (330), drives the upper sealing ring (230) to contact and seal the sealing plate (443), drives the sealing gasket (240) to move away from the top cover plate (410), and makes the air guide channel (620) communicate with the filter screen (210); Step three: when the filter screen (210) is self-cleaning, the wind force enters into the inside of the outer shell (100) through the air inlet pipe (420), and cleans the filter screen (210) to enter into the inside of the filter screen (210), drives the dust to enter into the inside of the dust discharge pipe (610) through the air guide channel (620), and drives the dust to be discharged; Step four: when adjusting to the normal discharge state, the repulsion force of the second magnet (340) and the first magnet (222) drives the filter screen (210) to rise, so that the filter screen (210) drives the fan blade (223) to open the air outlet hole (330), drives the upper sealing ring (230) to move away from the sealing plate (443), drives the sealing gasket (240) to contact and seal the top cover plate (410), moves the air guide channel (620) to the inside of the sealing sleeve (221), and makes the sealing sleeve (221) seal the air guide channel (620).

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