Building energy-saving ventilation system

Abstract

The invention relates to the technical field of building ventilation, in particular to a building energy-saving ventilation system which comprises an air inlet mechanism, an air filtering mechanism installed on the air inlet mechanism, an extended-range air inlet mechanism installed on the air filtering mechanism, a pneumatic energy supply mechanism installed on the extended-range air inlet mechanism and a sewage disposal mechanism installed on the air inlet mechanism. And the air inlet mechanism comprises a base, a flow guide pipe is fixedly installed in the base, and a conical filter screen is fixedly installed at the top of the flow guide pipe. The air inlet mechanism and the air filtering mechanism are installed on the ventilation pipe of the roof, and the stroke-increasing type air inlet mechanism is installed at the top of the air filtering mechanism, so that when fan blades are erected on the roof and are higher than a shielded wall body, air flow flowing along the outer wall of a building can assist the fan blades to rotate; and the fan blades, the transverse shaft and the eccentric gear can provide stable mechanical energy for the impeller shaft, and finally it can be ensured that the device achieves the purpose of continuous ventilation under the conditions that the roof is low in airflow and the airflow is blocked.

Description

Technical Field

[0001] This invention relates to the field of building ventilation technology, specifically to an energy-saving building ventilation system. Background Technology

[0002] Building ventilation systems are mainly used to purify polluted air inside buildings directly or indirectly, and then exhaust the purified air to the outside and replenish the building with fresh air.

[0003] Currently, the energy-saving ventilation systems used in buildings mainly rely on wind power to provide mechanical energy for the ventilation devices. Under the action of mechanical energy, the impeller inside the ventilation device will further actively draw outside air into the ventilation system. However, existing energy-saving ventilation devices have certain drawbacks in actual use. Common energy-saving ventilation devices need to be installed on the ventilation ducts on the roof. However, the structure of the top floor of different buildings varies greatly. When the boundary of the top floor of the building is chosen to be a shielding wall, the airflow on the roof will be blocked. Therefore, the actual ventilation efficiency of the energy-saving ventilation device is extremely low.

[0004] In view of this, an energy-saving ventilation system for buildings was designed to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted in this invention is as follows: An energy-saving ventilation system for buildings includes an air intake mechanism, an air filter mechanism mounted on the air intake mechanism, a range-extended air intake mechanism mounted on the air filter mechanism, a wind-powered power supply mechanism mounted on the range-extended air intake mechanism, and a cleaning mechanism mounted on the air intake mechanism. The air intake mechanism includes a base, a guide pipe fixedly installed inside the base, a conical filter screen fixedly installed at the top of the guide pipe, a stopper rod movably installed inside the conical filter screen, and a suspension bracket installed at the top of the stopper rod. The air filter mechanism includes an outer tube fixedly installed at the top of the base, an arc-shaped grid plate installed inside the outer tube, and a top pad fixedly installed on the inner side of the outer tube. The range-extended air intake mechanism includes a top cover and two... The load-bearing ring pads include one load-bearing ring pad installed inside the top cover and the other load-bearing ring pad installed on the top pad. Two ring rails are movably installed inside the two load-bearing ring pads, and multiple blades are fixedly installed evenly distributed inside the two ring rails. An impeller shaft is movably installed inside the top cover, and a gear is fixedly installed on the impeller shaft. The wind-powered energy supply mechanism includes a support plate fixedly installed on the top cover, four fixed plates installed on the support plate, a base installed inside the four fixed plates, a cylindrical sliding roller movably installed inside the base, a horizontally placed horizontal shaft fixedly installed inside the cylindrical sliding roller, a fan blade fixedly installed at the inner end of the horizontal shaft, and a fan blade adapted to mesh with the gear.

[0007] In a preferred embodiment, the present invention can be further configured such that: a slot is provided on the outside of the base, the plug rod is T-shaped, and a flow blocking pad is fixedly installed at the bottom of the plug rod; the flow blocking pad, together with the plug rod, is used to regularly reverse pressurize and discharge sewage into the inner cavity of the conical filter screen.

[0008] In a preferred embodiment, the present invention can be further configured such that: two vertical grooves are provided on the inner wall of the outer tube, a vertical rod is fixedly installed inside the top pad, and an annular baffle is movably installed on the inner side of the arc-shaped grid plate.

[0009] In a preferred embodiment, the present invention can be further configured such that: a slot is provided on the top of the top cover, and a filter element is fixedly installed in the slot; a sleeve is provided on the top of the top cover, and the rod segment of the horizontal shaft is adapted to pass through the sleeve.

[0010] In a preferred embodiment, the present invention can be further configured as follows: two studs are fixedly installed on the support plate, and nuts are installed on the studs; leaf springs are inserted into the outside of the two studs; the leaf springs are fixed to the support plate by the two nuts; a fastener is installed at the bottom end of the leaf springs; a pull rod is movably installed in the groove of the outer wall of the cylindrical roller, and the pull rod is adapted to extend through to the outside of the base; a pull cable is connected to the pull rod; a pad is fixedly installed on the pull cable; and the other end of the fastener is installed on the pad.

[0011] In a preferred embodiment, the present invention may be further configured such that a guide wheel is movably mounted within the base, and the cable is adapted to bear pressure within the annular groove of the guide wheel.

[0012] In a preferred embodiment, the present invention can be further configured as follows: the cleaning mechanism includes two housings, one of which is fixedly installed in a slot, two positioning plates are fixedly installed on the outside of the two housings, an end rod is movably installed inside the housing, a take-up roller is fixedly installed on the outside of the end rod, and a torsion spring is fixedly connected to the inner wall of the take-up roller and the inner wall of the housing. The two take-up rollers are respectively wound with a second seal and a first seal on their outer sides, and the second seal and the first seal respectively penetrate into two vertical grooves on the inner wall of the outer tube.

[0013] In a preferred embodiment, the present invention may be further configured such that: a horizontal truss is installed in the two adjacent ends of the second seal and the first seal, the outer end of the truss is fixedly installed at the bottom end of the cable, and a ring scraper is fixedly installed at the inner end of the truss, and the ring scraper is adapted to fit against the inner wall of the outer tube.

[0014] In a preferred embodiment, the present invention may be further configured such that: a bracket is fixedly installed on the inner side of the annular scraper, a spring is fixedly installed on the bracket, and the top end of the spring is fixedly installed on the suspension, and the outer end of the suspension is movably installed on the outside of the vertical rod.

[0015] In a preferred embodiment, the present invention may be further configured such that: the choking pad is made of rubber material and is fixed to the plug rod by an adhesive, and the side of the choking pad is provided with an anti-slip layer.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows: 1. This invention installs an air intake mechanism and an air filter mechanism on the ventilation duct of the roof, and installs a range-extending air intake mechanism on top of the air filter mechanism. When the fan blades are erected on the roof and above the obstructing wall, the airflow flowing along the exterior wall of the building will help rotate the fan blades. The fan blades, horizontal shaft, and eccentric gear will provide stable mechanical energy to the impeller shaft. Ultimately, this invention can ensure that the device can achieve continuous ventilation and air exchange even when the airflow is low and obstructed on the roof.

[0017] 2. This invention installs a cylindrical sliding roller on a horizontal axis. As the cylindrical sliding roller drives the pull rod and cable to make regular extension and retraction movements, the cable drives the horizontal frame and the ring scraper to continuously clean the inner wall of the exterior. The exhaust gas generated after cleaning is regularly discharged to the outside through the ring baffle and the arc-shaped grid plate. This not only does not interfere with the entry of fresh air into the room, but also improves the cleanliness of the air intake channel in the device.

[0018] 3. This invention installs a bracket on the ring scraper. As the ring scraper reciprocates, the spring compressed by the bracket pushes the suspension, the plug rod, and the flow blocking pad to regularly pressurize the inner cavity of the conical filter. The air pressure generated during the pressurization period cleans the filter pores in the conical filter. The cleaned dirt is discharged from the arc-shaped grid plate along with the ring scraper and the continuously drawn-in airflow, thereby improving the device and preventing the problem of reduced airflow caused by dirt blockage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the use of the present invention; Figure 2 This is a three-dimensional schematic diagram of the present invention; Figure 3 For the present invention Figure 1 A diagram showing the view from below; Figure 4 This is a schematic diagram of the wind-powered energy supply mechanism of the present invention; Figure 5 This is a schematic diagram of the cleaning mechanism of the present invention; Figure 6 This is a partial explosion diagram of the present invention; Figure 7 This is an exploded view of the range-extended air intake mechanism of the present invention; Figure 8 For the present invention Figure 6 An explosion diagram; Figure 9 This is an exploded view of the air filtration mechanism of the present invention; Figure 10 This is an exploded view of the air intake mechanism of the present invention.

[0020] Figure label: 100. Intake mechanism; 110. Base; 1101. Slot; 120. Guide tube; 130. Conical filter; 140. Plug rod; 1401. Plug pad; 150. Suspension; 200. Air filtration mechanism; 210. Outer pipe; 2101. Arc-shaped grid plate; 220. Top pad; 230. Vertical rod; 240. Annular baffle; 300. Extender-range air intake mechanism; 310. Top cover; 3101. Filter element; 320. Impeller shaft; 3201. Gear; 330. Load-bearing ring gasket; 340. Ring rail; 3401. Blade; 400. Pneumatic power supply mechanism; 410. Support plate; 4101. Fixing plate; 4102. Base; 4103. Guide wheel; 420. Leaf spring; 4201. Fastener; 430. Columnar sliding roller; 4301. Horizontal shaft; 4302. Deflection gear; 440. Fan blade; 450. Tie rod; 460. Cable; 4601. Pad block; 500. Cleaning mechanism; 510. Housing; 5101. Positioning plate; 520. End rod; 5201. Rewinding roller; 5202. Torsion spring; 530. Second seal; 540. First seal; 550. Truss; 5501. Ring scraper; 560. Bracket; 5601. Spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0022] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0023] The following describes, with reference to the accompanying drawings, some embodiments of an energy-saving ventilation system for buildings provided by the present invention.

[0024] Example 1: Combination Figures 1 to 10As shown, the present invention provides an energy-saving ventilation system for buildings, including an air intake mechanism 100, an air filter mechanism 200 installed on the air intake mechanism 100, a range-extended air intake mechanism 300 installed on the air filter mechanism 200, a wind-powered energy supply mechanism 400 installed on the range-extended air intake mechanism 300, and a cleaning mechanism 500 installed on the air intake mechanism 100. The air intake mechanism 100 is used to provide a transfer channel for fresh air, the air filter mechanism 200 is used to filter the intake airflow, the range-extended air intake mechanism 300 is used to extend the intake of air, the wind-powered energy supply mechanism 400 is used to enhance the efficiency of indoor ventilation in buildings, and the cleaning mechanism 500 is used to provide stable kinetic energy for cleaning dirt in the air filter mechanism 200.

[0025] The intake mechanism 100 includes a base 110, a guide pipe 120 is fixedly installed inside the base 110, a conical filter screen 130 is fixedly installed on the top of the guide pipe 120, a plug rod 140 is movably installed inside the conical filter screen 130, a suspension 150 is installed on the top of the plug rod 140, a slot 1101 is opened on the outside of the base 110, the plug rod 140 has a T-shaped structure, and a flow blocking pad 1401 is fixedly installed at the bottom of the plug rod 140. The flow blocking pad 1401 works with the plug rod 140 to regularly reverse pressurize and discharge dirt into the inner cavity of the conical filter screen 130. The flow blocking pad 1401 is made of rubber material and is fixed to the plug rod 140 by adhesive. The side of the flow blocking pad 1401 is provided with an anti-slip layer. The air filtration mechanism 200 includes an outer tube 210 fixedly installed at the top of the base 110, an arc-shaped grid plate 2101 installed inside the outer tube 210, a top pad 220 fixedly installed on the inner side of the outer tube 210, two vertical grooves opened on the inner wall of the outer tube 210, a vertical rod 230 fixedly installed inside the top pad 220, and an annular baffle 240 movably installed on the inner side of the arc-shaped grid plate 2101. The range extender air intake mechanism 300 includes a top cover 310 and two load-bearing ring pads 330. One load-bearing ring pad 330 is installed inside the top cover 310, and the other load-bearing ring pad 330 is installed on the top pad 220. Two ring rails 340 are movably installed inside the two load-bearing ring pads 330. Multiple blades 3401 are evenly distributed and fixedly installed inside the two ring rails 340. An impeller shaft 320 is movably installed inside the top cover 310. A gear 3201 is fixedly installed on the impeller shaft 320. A slot is opened at the top of the top cover 310, and a filter element 3101 is fixedly installed in the slot. A sleeve is provided at the top of the top cover 310, and the rod section of the horizontal shaft 4301 is adapted to pass through the sleeve. The wind-powered energy supply mechanism 400 includes a support plate 410 fixedly installed on the top cover 310. Four fixing plates 4101 are installed on the support plate 410. A base 4102 is installed inside the four fixing plates 4101. A cylindrical sliding roller 430 is movably installed inside the base 4102. A horizontally placed horizontal shaft 4301 is fixedly installed inside the cylindrical sliding roller 430. A deflection gear 4302 is fixedly installed at the inner end of the horizontal shaft 4301. A fan blade 440 is fixedly installed at the outer end of the horizontal shaft 4301. The deflection gear 4302 is adapted to mesh with the gear 3201.

[0026] When in use, the base 110 is pre-welded to the ventilation pipe on the roof using a welding torch. The top cover 310, the outer pipe 210 and the ventilation pipe form an effective ventilation passage. During welding, the fan blades 440 need to be oriented towards the outside of the eaves. As the airflow rises from the building's exterior wall and passes through the fan blades 440, the driven fan blades 440, in conjunction with the horizontal shaft 4301 and the deflection gear 4302, provide effective kinetic energy to the gear 3201 and the impeller shaft 320. The impeller shaft 320 is installed inside the top cover 310 via bearings. Therefore, the driven impeller shaft 320 actively draws in the airflow from the external environment of the top cover 310. After being filtered by the filter element 3101, the airflow is drawn into the inner cavity of the top cover 310. Finally, the drawn-in airflow is transferred to the interior of the outer pipe 210 along the cavity of the top cover 310. When the airflow on the roof is weak and it is difficult to assist the rotation of the blades 3401 and the two ring rails 340, the vertically downward blowing airflow will be transferred downward along the mesh on the inclined surface of the conical filter 130. Finally, the airflow after passing through the mesh of the conical filter 130 will be guided into the ventilation duct through the gap reserved between the conical filter 130 and the blocking pad 1401. The airflow after entering the ventilation duct will enter the room through the ventilation duct, forming an effective circulation of indoor and outdoor air.

[0027] Example 2: Combination Figure 4 As shown, based on Embodiment 1, two studs are fixedly installed on the support plate 410, and nuts are installed on the studs. Leaf springs 420 are inserted into the outside of the two studs. Leaf springs 420 are fixed to the support plate 410 by the two nuts. Fasteners 4201 are installed at the bottom end of leaf springs 420. A pull rod 450 is movably installed in the groove on the outer wall of the cylindrical roller 430. The pull rod 450 is adapted to pass through to the outside of the base 4102. A cable 460 is connected to the pull rod 450. A pad 4601 is fixedly installed on the cable 460. The other end of the fastener 4201 is installed on the pad 4601. A guide wheel 4103 is movably installed inside the base 4102, and the cable 460 is adapted to bear pressure in the annular groove of the guide wheel 4103.

[0028] Preferably, the bottom end of the support plate 410 is welded to the outer wall of the top cover 310, and the top of the support plate 410 is provided with a through hole, and the rod segment of the horizontal shaft 4301 is installed in the through hole through a bearing. The outer wall of the cylindrical slide roller 430 and the inner wall of the base 4102 are coated with lubricating oil. The base 4102 is composed of a horizontal tube, a U-shaped outer frame and a guide rod, and the slide at the bottom of the horizontal tube is used to provide limit and guide for the lateral sliding of the pull rod 450. In addition, the guide wheel 4103 is mounted on the outside of the guide rod via a bearing. The bottom of the leaf spring 420 has a quarter-circle structure. As the cable 460 is pulled by the pull rod 450 and extends along the outside of the guide wheel 4103, the pad 4601 will pressurize the leaf spring 420 until the leaf spring 420 deforms. The deformed leaf spring 420 will provide effective restoring force for the pad 4601 and the cable 460.

[0029] Example 3: Combination Figures 4 to 10 As shown, in the above embodiment, the cleaning mechanism 500 includes two outer shells 510, one of which is fixedly installed in the slot 1101. Two positioning plates 5101 are fixedly installed on the outside of the two outer shells 510. An end rod 520 is movably installed inside the outer shell 510. A winding roller 5201 is fixedly installed on the outside of the end rod 520. A torsion spring 5202 is fixedly connected to the inner wall of the winding roller 5201 and the inner wall of the outer shell 510. The two winding rollers 5201 are respectively wound with a second seal 530 and a first seal 540, and the second seal 530 and the first seal 540 respectively penetrate into two vertical grooves on the inner wall of the outer tube 210. A horizontal truss 550 is installed in the two adjacent ends of the second seal 530 and the first seal 540. The outer end of the truss 550 is fixedly installed at the bottom end of the cable 460, and the inner end of the truss 550 is fixedly installed with a ring scraper 5501, which is adapted to fit against the inner wall of the outer tube 210. A bracket 560 is fixedly installed on the inner side of the ring scraper 5501, and a spring 5601 is fixedly installed on the bracket 560. The top end of the spring 5601 is fixedly installed on the suspension 150, and the outer end of the suspension 150 is movably installed on the outside of the vertical rod 230.

[0030] Preferably, the bottom end of the cable 460 is inserted into the hole at the outer end of the truss 550, and the bottom end of the cable 460 is fixed inside the truss 550 by bolts. The truss 550 is movably installed in the middle of the two vertical grooves on the inner wall of the outer tube 210. The second seal 530 and the first seal 540 fixed on the truss 550 can provide air leakage protection for the inner cavity of the outer tube 210 along the two vertical grooves. At the same time, the truss 550 and the ring scraper 5501 pulled by the cable 460 will scrape off the dirt on the inner wall of the outer tube 210. The annular scraper 5501 has blades at both its top and bottom. The spring 5601 consists of an L-shaped support rod and a washer. The vertical rod 230 is adapted to pass through the spring 5601. As the annular scraper 5501 moves up and down regularly along the inner cavity of the outer tube 210, the bracket 560 compresses the spring 5601. During the compression, the spring 5601 applies upward pressure to the suspension 150 and the plug rod 140. The flow blocking pad 1401 blocks the inner cavity of the conical filter 130. Finally, the annular baffle 240 fixed to the outer end of the suspension 150 detaches from the arc-shaped grid 2101. This process can be combined with the downward-inhaled airflow to squeeze the scraped dirt outward.

[0031] The working principle and usage process of this invention: The base 110 is fixedly installed on the ventilation pipe reserved on the roof until the ventilation pipe on the roof is connected to the base 110, the outer pipe 210 and the inner cavity of the top cover 310. During the installation process, the fan blades 440 need to be oriented towards the direction outside the eaves. When the device is fully assembled, the fan blade 440 located outside the eaves will be the first to pass through the airflow flowing along the building's exterior wall. Since the fan blade 440 is relatively long, the rotating fan blade 440, in conjunction with the horizontal shaft 4301, will drive the cylindrical sliding roller 430 and the deflection gear 4302 to work together. As the cylindrical roller 430 rotates, the tie rod 450, which runs through the bottom slide of the base 4102, will reciprocate along the groove on the outer wall of the cylindrical roller 430. The tie rod 450 will drive the cable 460 to extend and retract regularly. Under the pressure and guidance of the guide wheel 4103, the bottom end of the cable 460 will drive the truss 550 and the ring scraper 5501 to reciprocate up and down along the inner cavity of the outer tube 210. During the up and down movement of the ring scraper 5501, the dirt in the airflow entering the inner cavity of the outer tube 210 from the extended air intake mechanism 300 will be continuously scraped away. At the same time, the deflection gear 4302 will drive the gear 3201, and the impeller shaft 320 installed in the top cover 310 through the bearing will continue to rotate at high speed. Air from the external environment of the top cover 310 will be actively drawn into the cavity formed by the top cover 310 and the outer tube 210 through the filter element 3101. When there is airflow on the roof, the airflow blowing downward from the top cover 310 will be combined with the airflow attracted by the rotating ring rail 340 and blades 3401 and gathered into the interior of the outer pipe 210. After being gathered, the airflow will be transferred from the mesh of the inclined surface of the conical filter screen 130 to the guide pipe 120. Finally, the airflow entering the guide pipe 120 will enter the room along the ventilation pipe of the roof, thereby achieving the purpose of energy saving and energy transmission. When the airflow on the roof is weak and it is difficult to assist the rotation of the ring rail 340 and blades 3401, the rotating fan blades 440 will provide extended kinetic energy to the impeller shaft 320 and achieve effective air intake under the weak airflow condition on the roof. As the truss 550 and the annular scraper 5501 reciprocate up and down along the inner cavity of the outer tube 210, the truss 550 drives the second seal 530 and the first seal 540 to regularly extend and retract along the two vertical grooves on the outer wall of the outer tube 210, ensuring that the airflow can be stably transferred to the inner cavity of the outer tube 210. Simultaneously with the regular vibration of the annular scraper 5501, the bracket 560 installed inside the annular scraper 5501 compresses the spring 5601. The compressed spring 5601 then pushes the suspension 150 and the plug... The rod 140 and the annular baffle 240 slide back and forth. As the annular baffle 240 moves upward from the inside of the arc-shaped grid 2101, the inner cavity of the outer tube 210 will be connected to the outside. The flow blocking pad 1401 fixed on the rod 140 will block the inner side of the conical filter 130. At this time, the airflow input from the top cover 310 will release the dirt scraped from the inner cavity of the outer tube 210 outward from the arc-shaped grid 2101, thereby effectively ensuring that the device achieves the purpose of energy-saving ventilation in the building under bottom wind conditions.

[0032] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A building energy-saving ventilation system, comprising an air intake mechanism (100), characterized in that, It also includes an air filter (200) installed on the air intake mechanism (100), a range extender air intake mechanism (300) installed on the air filter mechanism (200), a wind-powered energy supply mechanism (400) installed on the range extender air intake mechanism (300), and a cleaning mechanism (500) installed on the air intake mechanism (100). The air intake mechanism (100) includes a base (110), a guide pipe (120) is fixedly installed inside the base (110), a conical filter (130) is fixedly installed on the top of the guide pipe (120), a stopper rod (140) is movably installed inside the conical filter (130), and a suspension (150) is installed on the top of the stopper rod (140). The air filtration mechanism (200) includes an outer tube (210) fixedly installed at the top of the base (110), an arc-shaped grid plate (2101) is installed inside the outer tube (210), and a top pad (220) is fixedly installed on the inner side of the outer tube (210). The range-extending air intake mechanism (300) includes a top cover (310) and two load-bearing ring pads (330). One load-bearing ring pad (330) is installed inside the top cover (310), and the other load-bearing ring pad (330) is installed on the top pad (220). Two ring rails (340) are movably installed inside the two load-bearing ring pads (330). Multiple blades (3401) are fixedly installed in the two ring rails (340). An impeller shaft (320) is movably installed inside the top cover (310), and a gear (3201) is fixedly installed on the impeller shaft (320). The wind-powered energy supply mechanism (400) includes a support plate (410) fixedly installed on the top cover (310). Four fixing plates (4101) are installed on the support plate (410). A base (4102) is installed in the four fixing plates (4101). A cylindrical sliding roller (430) is movably installed in the base (4102). A horizontal shaft (4301) is fixedly installed in the cylindrical sliding roller (430). A deflection gear (4302) is fixedly installed at the inner end of the horizontal shaft (4301). A fan blade (440) is fixedly installed at the outer end of the horizontal shaft (4301). The deflection gear (4302) is adapted to mesh with the gear (3201).

2. The building energy-saving ventilation system according to claim 1, characterized in that, The base (110) has a slot (1101) on its outside. The plug rod (140) has a T-shaped structure and a flow blocking pad (1401) is fixedly installed at the bottom of the plug rod (140). The flow blocking pad (1401) works with the plug rod (140) to regularly reverse pressurize and discharge sewage into the inner cavity of the conical filter screen (130).

3. The building energy-saving ventilation system according to claim 1, characterized in that, The inner wall of the outer tube (210) has two vertical grooves, the top pad (220) is fixedly installed with a vertical rod (230), and the inner side of the arc-shaped grid plate (2101) is movably installed with an annular baffle (240).

4. The building energy-saving ventilation system according to claim 1, characterized in that, The top of the top cover (310) has a slot, and a filter element (3101) is fixedly installed in the slot. The top of the top cover (310) is provided with a sleeve, and the rod segment of the horizontal shaft (4301) is adapted to pass through the sleeve.

5. A building energy-saving ventilation system according to claim 1, characterized in that, Two studs are fixedly installed on the support plate (410), and nuts are installed on the studs. Leaf springs (420) are inserted into the outside of the two studs. The leaf springs (420) are fixed to the support plate (410) by the two nuts. Fasteners (4201) are installed at the bottom of the leaf springs (420). A pull rod (450) is movably installed in the groove on the outer wall of the cylindrical roller (430), and the pull rod (450) is adapted to pass through the outside of the base (4102). A cable (460) is connected to the pull rod (450). A pad (4601) is fixedly installed on the cable (460), and the other end of the fastener (4201) is installed on the pad (4601).

6. A building energy-saving ventilation system according to claim 5, characterized in that, A guide wheel (4103) is movably installed inside the base (4102), and the cable (460) is adapted to bear pressure in the annular groove of the guide wheel (4103).

7. The building energy-saving ventilation system according to claim 1, characterized in that, The cleaning mechanism (500) includes two housings (510), one of which is fixedly installed in the slot (1101). Two positioning plates (5101) are fixedly installed on the outside of the two housings (510). An end rod (520) is movably installed inside the housing (510). A take-up roller (5201) is fixedly installed on the outside of the end rod (520). A torsion spring (5202) is fixedly connected to the inner wall of the take-up roller (5201) and the inner wall of the housing (510). The two take-up rollers (5201) are respectively wound with a second seal (530) and a first seal (540), and the second seal (530) and the first seal (540) respectively penetrate into two vertical grooves on the inner wall of the outer tube (210).

8. A building energy-saving ventilation system according to claim 7, characterized in that, A horizontal truss (550) is installed in the two adjacent ends of the second seal (530) and the first seal (540). The outer end of the truss (550) is fixedly installed at the bottom end of the cable (460). A ring scraper (5501) is fixedly installed at the inner end of the truss (550), and the ring scraper (5501) is adapted to fit against the inner wall of the outer tube (210).

9. A building energy-saving ventilation system according to claim 8, characterized in that, A bracket (560) is fixedly installed on the inner side of the ring scraper (5501), and a spring (5601) is fixedly installed on the bracket (560). The top end of the spring (5601) is fixedly installed on the suspension (150), and the outer end of the suspension (150) is movably installed on the outside of the vertical rod (230).

10. A building energy-saving ventilation system according to claim 2, characterized in that, The flow blocking pad (1401) is made of rubber material and is fixed to the plug rod (140) by adhesive, and the side of the flow blocking pad (1401) is provided with an anti-slip layer.

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