CN216114511U - Intelligent air purification equipment convenient for detecting indoor and outdoor air quality - Google Patents

Intelligent air purification equipment convenient for detecting indoor and outdoor air quality Download PDF

Info

Publication number
CN216114511U
CN216114511U CN202121911462.0U CN202121911462U CN216114511U CN 216114511 U CN216114511 U CN 216114511U CN 202121911462 U CN202121911462 U CN 202121911462U CN 216114511 U CN216114511 U CN 216114511U
Authority
CN
China
Prior art keywords
fixed
indoor
post
air purification
column
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202121911462.0U
Other languages
Chinese (zh)
Inventor
穆晓妮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi Zhuoyuan Environmental Protection Engineering Co ltd
Original Assignee
Shaanxi Zhuoyuan Environmental Protection Engineering Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shaanxi Zhuoyuan Environmental Protection Engineering Co ltd filed Critical Shaanxi Zhuoyuan Environmental Protection Engineering Co ltd
Priority to CN202121911462.0U priority Critical patent/CN216114511U/en
Application granted granted Critical
Publication of CN216114511U publication Critical patent/CN216114511U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The utility model discloses intelligent air purification equipment convenient for detecting indoor and outdoor air quality, which comprises a ventilation pipeline, wherein an auxiliary closing mechanism is arranged in the ventilation pipeline, a through column is arranged in the auxiliary closing mechanism, an air channel is arranged in the through column, an auxiliary filtering mechanism is arranged in the air channel, and both ends of the through column are provided with a PM2.5 detection sensor and a smoke alarm. This intelligence air purification equipment convenient to detect indoor outer air quality is provided with supplementary closing mechanism, linear screw motor can effectually promote the axis direction removal of lead screw guide pillar along the fixed slot post through accommodate the lead screw, the one end and the lead screw guide pillar synchronous motion that can pull branch, and can pull the sunshade and rotate along the outside of fixed pin, the turned angle that can effectual change fixed pin, and the angle that opens and shuts that can effectual change sunshade, thereby can the gaseous velocity of flow of effectual control, and can adjust the sunshade to vertical state, can close air pipe.

Description

Intelligent air purification equipment convenient for detecting indoor and outdoor air quality
Technical Field
The utility model relates to the technical field of air purification, in particular to intelligent air purification equipment convenient for detecting indoor and outdoor air quality.
Background
It has been considered that outdoor air is a serious air pollution. In fact, the indoor environment of buildings such as offices, living rooms, restaurants, movie theaters, network clubs, dance halls and the like has much larger influence on the health of people than the outdoor environment, so the quality of the indoor environment directly influences the health of people. From a real-world perspective, indoor air quality is far inferior to outdoor atmospheric environments.
The utility model relates to an intelligent air purification device aiming at the patent application number CN206739476U, which comprises an indoor switchboard, wherein one side of the indoor switchboard is provided with an outdoor air inlet, one side of the outdoor air inlet is provided with a plurality of indoor air inlets, a purification component is arranged in the indoor switchboard, one side of the purification component is provided with a temperature regulation component, the top of the purification component is provided with an air inlet assembly pipeline, one end of the air inlet assembly pipeline is provided with a fan, one side of the fan is provided with a streamer discharge device, one side of the streamer discharge device is provided with an activated carbon layer, the device can detect the indoor and outdoor air quality at any time, thereby selecting air inlet, absorbing various indoor toxic and harmful substances, clearing away indoor virus and microorganism, selectively enhancing air purification according to rooms with different uses in the room, ensuring the purity of the air of each room in the room, according to different uses in different rooms, adjust indoor air composition, reinforcing indoor living environment's comfort level, intelligent degree is high, has following problem:
above-mentioned intelligence air purification equipment is in the use, and the closure of the intelligent air purification equipment gas flow channel of not being convenient for control, or the control gas flow rate, and the dismouting of being not convenient for of filtration structure uses for a long time, reduces the filter effect easily, to above-mentioned condition, carries out technical innovation on current intelligence air purification equipment basis.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide intelligent air purification equipment convenient for detecting the quality of indoor and outdoor air, and aims to solve the problems that the closing of a gas flow channel of the intelligent air purification equipment or the gas flow rate is inconvenient to control, a filtering structure is inconvenient to disassemble and assemble, the intelligent air purification equipment is used for a long time, and the filtering effect is easy to reduce in the use process of the intelligent air purification equipment in the background art.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an intelligence air purification equipment convenient to detect indoor outer air quality, includes air pipe, be equipped with supplementary closing mechanism in the air pipe, be equipped with logical post in the supplementary closing mechanism, it has the wind channel to open in the post, be equipped with supplementary filtering mechanism in the wind channel, the both ends of leading to the post all are equipped with PM2.5 and detect sensor and smoke alarm.
Preferably, supplementary closing mechanism includes fixed slot post, sunshade, fixed pin, lead screw guide pillar, accommodate the lead screw, linear screw motor, branch and lockpin, the both sides of fixed slot post are equipped with the sunshade, the fixed pin is worn to be equipped with in the junction between fixed slot post and the sunshade, the sunshade passes through fixed pin swing joint on the fixed slot post.
Preferably, a screw guide post is arranged in the fixed groove post, an adjusting screw is arranged in the screw guide post in a penetrating manner, the input end of the adjusting screw is connected with a linear screw motor, and the linear screw motor is fixed on the fixed groove post through a bolt.
Preferably, the two sides of the screw guide post are provided with support rods, the two ends of each support rod are respectively provided with a lock pin in a penetrating mode, one end of each support rod is movably connected to the shielding plate through the lock pin, and the other end of each support rod is movably connected to the screw guide post through the lock pin.
Preferably, the auxiliary filtering mechanism comprises a fixed sleeve column, a fixed shaft rod, a driving motor, side plates, a cross rod, a connecting filter screen, a sliding groove, a fixed sliding block, a pressing rod, an inserting block, a return spring and a lock pin II, the fixed shaft rod penetrates through the fixed sleeve column, the input end of the fixed shaft rod is connected with the driving motor, the driving motor is fixed on the through column through bolts, six groups of side plates are arranged on the fixed sleeve column, each group comprises two side plates, and the side plates are fixed on the fixed sleeve column.
Preferably, the inner wall of the side plates is provided with a sliding groove, a cross rod is arranged between the side plates, and a fixed sliding block matched with the sliding groove in size is arranged between the side plates, and the fixed sliding block is integrally fixed on the cross rod.
Preferably, the two ends of the side plate are provided with pressing rods, the pressing rods are provided with inserting blocks integrally fixed with the pressing rods, and the sliding block is internally provided with a slot matched with the inserting blocks in size.
Preferably, a return spring is arranged between the side plate and the compression bar, a second lock pin penetrates through the return spring, and the compression bar is movably connected to the side plate through the matching between the return spring and the second lock pin.
Compared with the prior art, the utility model has the following beneficial effects:
the auxiliary closing mechanism is arranged, the linear screw rod motor can effectively push the screw rod guide pillar to move along the central axis direction of the fixed groove pillar through the adjusting screw rod, and the transverse position of the screw rod guide pillar on the fixed groove pillar can be effectively changed; the screw rod guide post is connected with the shielding plate through the matching between the support rod and the lock pin, so that one end of the support rod can be pulled to synchronously move with the screw rod guide post, the shielding plate can be pulled to rotate along the outer part of the fixing pin, the rotating angle of the fixing pin can be effectively changed, the opening and closing angle of the shielding plate can be effectively changed, the flow rate of gas can be effectively controlled, the shielding plate can be adjusted to be in a vertical state, and the ventilation pipeline can be closed;
the auxiliary filtering mechanism is arranged, the driving motor can drive the fixed sleeve column to rotate through the fixed shaft lever, and the fixed sleeve column is fixedly connected with the side plate, so that the side plate can be driven to rotate; the cross rod can move along the sliding grooves of the side plates through the fixed sliding blocks until the two fixed sliding blocks move to proper positions, so that the connecting filter screen can provide filtering treatment for gas; can rotate the depression bar along the outside of lockpin two through return spring to insert the inserted block of depression bar tip in the slot in the fixed slider, can be connected the horizontal pole with the curb plate through the inserted block, thereby can effectual restriction horizontal pole, connect filter screen and curb plate three's position, or can apply the pressing force to the one end of depression bar, make the inserted block of the depression bar other end rotate along the outside of lockpin two, and keep away from the horizontal pole with the inserted block, thereby can effectual improvement dismouting horizontal pole and the convenience of connecting the filter screen.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic side view of a connecting screen according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at B according to the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 1 according to the present invention.
In the figure: 1. a ventilation duct; 2. an auxiliary closing mechanism; 201. fixing the groove column; 202. a shutter; 203. a fixing pin; 204. a lead screw guide post; 205. adjusting the screw rod; 206. a linear screw motor; 207. a strut; 208. a lock pin; 3. passing through the column; 4. a PM2.5 detection sensor; 5. a smoke alarm; 6. an air duct; 7. an auxiliary filtering mechanism; 701. fixing the sleeve column; 702. fixing the shaft lever; 703. driving a motor; 704. a side plate; 705. a cross bar; 706. connecting a filter screen; 707. a chute; 708. fixing the sliding block; 709. a pressure lever; 710. inserting a block; 711. a return spring; 712. and a second lock pin.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1
As shown in fig. 1, this embodiment provides an intelligent air purification device convenient to detect indoor and outdoor air quality, including air pipe 1, be equipped with supplementary closing mechanism 2 in the air pipe 1, be equipped with logical post 3 in the supplementary closing mechanism 2, logical 3 interior wind channels 6 that have seted up of post, be equipped with supplementary filter mechanism 7 in the wind channel 6, lead to the both ends of post 3 and all be equipped with PM2.5 detection sensor 4 and smoke alarm 5.
Example II
The scheme in the first embodiment is further described in the following with reference to specific working modes, which are described in detail in the following:
as shown in fig. 1 and 4, as a preferred embodiment, based on the above-mentioned manner, the auxiliary closing mechanism 2 further includes a fixed slot column 201, a shield 202, a fixed pin 203, a lead screw guide column 204, an adjusting lead screw 205, a linear lead screw motor 206, a support rod 207 and a lock pin 208, the shield 202 is disposed on both sides of the fixed slot column 201, the lead screw guide column 204 is disposed in the fixed slot column 201, the support rod 207 is disposed on both sides of the lead screw guide column 204, the lock pin 208 is disposed at both ends of the support rod 207, one end of the support rod 207 is movably connected to the shield 202 through the lock pin 208, the other end is movably connected to the lead screw guide column 204 through the lock pin 208, the lead screw guide column 204 is connected to the shield 202 through the cooperation between the support rod 207 and the lock pin 208, so that one end of the support rod 207 can be pulled to move synchronously with the lead screw guide column 204, and the shield 202 can be pulled to rotate along the outside of the fixed pin 203, the rotation angle of the fixed pin 203 can be effectively changed, and can effectual change the angle that opens and shuts of sunshade 202, thereby can the gaseous velocity of flow of effectual control, and can adjust sunshade 202 to vertical state, can close ventilation pipe 1, wear to be equipped with accommodate the lead screw 205 in the lead screw guide pillar 204, accommodate the input of lead screw 205 and be connected with linear screw motor 206, linear screw motor 206 passes through the bolt fastening on fixed slot post 201, under linear screw motor 206's effect, can effectually promote the axis direction removal of lead screw guide pillar 204 along fixed slot post 201 through accommodate the lead screw 205, can the horizontal position of effectual change lead screw guide pillar 204 on fixed slot post 201, fixed pin 203 is worn to be equipped with in the junction between fixed slot post 201 and the sunshade 202, sunshade 202 passes through fixed pin 203 swing joint on fixed slot post 201.
As shown in fig. 1, 2 and 3, as a preferred embodiment, based on the above-mentioned manner, the auxiliary filtering mechanism 7 further includes a fixed sleeve column 701, a fixed shaft 702, a driving motor 703, side plates 704, a cross bar 705, a connecting filter screen 706, a sliding slot 707, a fixed sliding block 708, a pressing rod 709, an insert block 710, a return spring 711 and a second locking pin 712, the fixed sleeve column 701 is internally provided with the fixed shaft 702, an input end of the fixed shaft 702 is connected with the driving motor 703, the driving motor 703 is fixed on the through column 3 through a bolt, the fixed sleeve column 701 is provided with six groups of side plates 704, each group is two, the inner wall of the side plates 704 is provided with the sliding slot 707, the cross bar 705 is arranged between the side plates 704, and a fixed sliding block 708 matched with the size of the sliding slot 707, the fixed sliding block 708 is integrally fixed on the cross bar 705, the cross bar 705 can move along the sliding slot 707 of the side plates 704 through the fixed sliding block 708, until the two fixed sliding blocks 708 are moved to proper positions, so that the connecting filter screen 706 can provide filtering treatment for gas, the side plate 704 is fixed on the fixed sleeve column 701, under the action of the driving motor 703, the fixed sleeve column 701 can be driven to rotate by the fixed shaft rod 702, the fixed sleeve column 701 is fixedly connected with the side plate 704, so that the side plate 704 can be driven to rotate, two ends of the side plate 704 are provided with press rods 709, return springs 711 are arranged between the side plate 704 and the press rods 709, lock pins two 712 penetrate through the return springs 711, the press rods 709 are movably connected to the side plate 704 through the matching between the return springs 711 and the lock pins two 712, the press rods 709 are provided with inserting blocks 710 integrally fixed with the press rods 709, the sliding blocks 708 are internally provided with inserting grooves with the size matched with the inserting blocks 710, the press rods 709 can be rotated along the outer parts of the lock pins two 712 through the return springs, and the inserting blocks 710 at the ends of the press rods 709 are inserted into the inserting grooves in the fixed sliding blocks 708, the cross rod 705 can be connected with the side plate 704 through the inserting block 710, so that the positions of the cross rod 705, the connecting filter screen 706 and the side plate 704 can be effectively limited, or pressing force can be applied to one end of the pressing rod 709, so that the inserting block 710 at the other end of the pressing rod 709 rotates along the outer part of the second locking pin 712, the inserting block 710 is far away from the cross rod 705, and the convenience for assembling and disassembling the cross rod 705 and connecting the filter screen 706 can be effectively improved.
This intelligence air purification equipment's theory of operation convenient to detect indoor outer air quality: firstly, the cross bar 705 can move along the sliding groove 707 of the side plate 704 through the fixed sliding block 708 until the two fixed sliding blocks 708 are moved to proper positions, then the compression bar 709 can rotate along the outside of the second locking pin 712 through the return spring 711, the insertion block 710 at the end part of the compression bar 709 is inserted into the insertion groove in the fixed sliding block 708, and the cross bar 705 can be connected with the side plate 704 through the insertion block 710, so that the positions of the cross bar 705, the connecting filter screen 706 and the side plate 704 are limited, and then the driving motor 703 can be started, so that the driving motor 703 drives the fixed sleeve column 701 to rotate through the fixed shaft lever 702 and synchronously drives the connecting filter screen 706, and the connecting filter screen 706 can provide efficient filtering treatment for gas;
then, if the PM2.5 detection sensor 4 exceeds the standard or the smoke alarm 5 gives an alarm, the air duct 6 may be closed, and then the linear lead screw motor 206 is started, so that the linear lead screw motor 206 pushes the lead screw guide post 204 to move along the central axis direction of the fixed groove post 201 through the adjusting lead screw 205, and the lead screw guide post 204 is connected with the shield plate 202 through the cooperation between the support rod 207 and the lock pin 208, so that one end of the support rod 207 may be pulled to move synchronously with the lead screw guide post 204, and the shield plate 202 may be pulled to rotate along the outside of the fixing pin 203 until the shield plate 202 is adjusted to the vertical state, and the ventilation duct 1 may be closed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides an intelligence air purification equipment convenient to detect indoor outer air quality, includes air pipe (1), its characterized in that: be equipped with supplementary closing mechanism (2) in air pipe (1), be equipped with logical post (3) in supplementary closing mechanism (2), air duct (6) have been seted up in logical post (3), be equipped with supplementary filtering mechanism (7) in air duct (6), the both ends that lead to post (3) all are equipped with PM2.5 detection sensor (4) and smoke alarm (5).
2. An intelligent air purification apparatus for facilitating detection of indoor and outdoor air quality as claimed in claim 1, wherein: supplementary closing mechanism (2) are including fixed slot post (201), sunshade (202), fixed pin (203), lead screw guide pillar (204), accommodate the lead screw (205), linear screw motor (206), branch (207) and lockpin (208), the both sides of fixed slot post (201) are equipped with sunshade (202), fixed pin (203) are worn to be equipped with in the junction between fixed slot post (201) and sunshade (202), sunshade (202) are through fixed pin (203) swing joint on fixed slot post (201).
3. An intelligent air purification apparatus for facilitating detection of indoor and outdoor air quality as claimed in claim 2, wherein: the fixing groove column (201) is internally provided with a screw guide post (204), an adjusting screw (205) penetrates through the screw guide post (204), the input end of the adjusting screw (205) is connected with a linear screw motor (206), and the linear screw motor (206) is fixed on the fixing groove column (201) through a bolt.
4. An intelligent air purification apparatus for facilitating detection of indoor and outdoor air quality as claimed in claim 2, wherein: the two sides of the screw guide post (204) are provided with supporting rods (207), two ends of each supporting rod (207) are respectively provided with a lock pin (208) in a penetrating mode, one end of each supporting rod (207) is movably connected to the shielding plate (202) through the lock pin (208), and the other end of each supporting rod is movably connected to the screw guide post (204) through the lock pin (208).
5. An intelligent air purification apparatus for facilitating detection of indoor and outdoor air quality as claimed in claim 1, wherein: the auxiliary filtering mechanism (7) comprises a fixed sleeve column (701), a fixed shaft rod (702), a driving motor (703), a side plate (704), a cross rod (705), a connecting filter screen (706), a sliding groove (707), a fixed sliding block (708), a pressing rod (709), an inserting block (710), a return spring (711) and a second locking pin (712), wherein the fixed shaft rod (702) penetrates through the fixed sleeve column (701), the input end of the fixed shaft rod (702) is connected with the driving motor (703), the driving motor (703) is fixed on the through column (3) through a bolt, six groups of side plates (704) are arranged on the fixed sleeve column (701), each group is two, and the side plates (704) are fixed on the fixed sleeve column (701).
6. An intelligent air purification apparatus for facilitating detection of indoor and outdoor air quality as claimed in claim 5, wherein: the inner wall of the side plates (704) is provided with sliding grooves (707), cross bars (705) are arranged between the side plates (704), and fixed sliding blocks (708) matched with the sliding grooves (707) in size are arranged, and the fixed sliding blocks (708) are integrally fixed on the cross bars (705).
7. An intelligent air purification apparatus for facilitating detection of indoor and outdoor air quality as claimed in claim 5, wherein: both ends of curb plate (704) are equipped with depression bar (709), be equipped with on depression bar (709) with the fixed inserted block (710) of depression bar (709) integral type, set up in slider (708) with inserted block (710) size complex slot.
8. An intelligent air purification apparatus for facilitating detection of indoor and outdoor air quality as claimed in claim 5, wherein: a return spring (711) is arranged between the side plate (704) and the pressing rod (709), a second locking pin (712) penetrates through the return spring (711), and the pressing rod (709) is movably connected to the side plate (704) through the matching between the return spring (711) and the second locking pin (712).
CN202121911462.0U 2021-08-16 2021-08-16 Intelligent air purification equipment convenient for detecting indoor and outdoor air quality Active CN216114511U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121911462.0U CN216114511U (en) 2021-08-16 2021-08-16 Intelligent air purification equipment convenient for detecting indoor and outdoor air quality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121911462.0U CN216114511U (en) 2021-08-16 2021-08-16 Intelligent air purification equipment convenient for detecting indoor and outdoor air quality

Publications (1)

Publication Number Publication Date
CN216114511U true CN216114511U (en) 2022-03-22

Family

ID=80726178

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121911462.0U Active CN216114511U (en) 2021-08-16 2021-08-16 Intelligent air purification equipment convenient for detecting indoor and outdoor air quality

Country Status (1)

Country Link
CN (1) CN216114511U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117365651A (en) * 2023-11-02 2024-01-09 石家庄市轨道交通集团有限责任公司 Multifunctional air quality monitoring and alarming device for subway station operation management period and application method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117365651A (en) * 2023-11-02 2024-01-09 石家庄市轨道交通集团有限责任公司 Multifunctional air quality monitoring and alarming device for subway station operation management period and application method thereof

Similar Documents

Publication Publication Date Title
CN216114511U (en) Intelligent air purification equipment convenient for detecting indoor and outdoor air quality
US11204183B2 (en) Ventilator with dual flow passages
CN106705245A (en) Air conditioner with purifying function
KR20190132044A (en) Ventilation equipment for window
CN107246718B (en) Air valve and heat exchanger with same
CN110409974A (en) A kind of door and window with ventilation device
CN202468372U (en) Two-way synchronous ventilator
CN215765505U (en) Water curtain with filtering and corrosion-resistant structure
KR20120076050A (en) Ventilating apparatus
CN104381140A (en) Positive-pressure directional flow ten thousand-level purification monkey feeding laboratory room
KR101932516B1 (en) Heat exchange ventilating module for window and ventilating assembly apparatus having the same
KR100913767B1 (en) Ventilator
CN114135028A (en) Efficient energy-saving integrated internal circulation double-layer curtain wall system and using method thereof
EP1436552B1 (en) Door device comprising at least one door
KR102442471B1 (en) Filters close adhesion air purifier
CN1693785A (en) Window air conditioning device
CN203869248U (en) System for arranging indoor ventilation devices and air quality regulation devices
CN218895489U (en) Fresh air system with double air inlets
KR100261696B1 (en) Out door unit for air conditioner
KR20000056584A (en) Inlet and outlet closing apparatus of air-conditioner
CN214946658U (en) Exempt from equipment of welding fire prevention valve
CN213019895U (en) Air conditioner return air structure and air conditioner
CN220489349U (en) Energy-saving ventilation device for building
CN217897723U (en) XT95 series novel micro ventilation indoor and outdoor circulation system door and window
CN215332276U (en) Outer sunshade integration system flat-open window is with rolling up curtain upper ledge section bar

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant