CN210801410U - Fresh air control device and vertical window machine - Google Patents
Fresh air control device and vertical window machine Download PDFInfo
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- CN210801410U CN210801410U CN201921502091.3U CN201921502091U CN210801410U CN 210801410 U CN210801410 U CN 210801410U CN 201921502091 U CN201921502091 U CN 201921502091U CN 210801410 U CN210801410 U CN 210801410U
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Abstract
The utility model discloses a fresh air control device, fresh air control device includes the new trend subassembly, the new trend subassembly is including air guide assembly and the air-supply line and the blast pipe of the relative both sides in intercommunication wind chamber that have the wind chamber, air guide assembly locates the new trend wind wheel in the wind chamber including rotating, the new trend wind wheel is including locating the body in the wind chamber and locating the rotor blade on the body, the body separates the wind chamber for being located the first wind chamber and the second wind chamber of body both sides, rotor blade is including acceping in the first blade in first wind chamber and acceping in the second blade in second wind chamber, the air outlet of air-supply line all sets up to all sides of body with the air intake of blast pipe. The utility model discloses a fresh air control device, the condition of mutual interference can not take place for the air in first wind chamber and the second wind chamber, has avoided turbulent production, has guaranteed the smooth and easy flow of air to increased the intake, promoted air inlet efficiency. The utility model also discloses a vertical window machine with this fresh air control device.
Description
Technical Field
The utility model relates to a vertical window machine field, in particular to fresh air control device and vertical window machine.
Background
The vertical window air conditioner is mostly provided with a fresh air system, and the fresh air system introduces outdoor air into a room through an air inducing device. At present, the outdoor air is introduced into the room and is usually realized by adopting a wind wheel arranged in a cavity, but when the air flows through the cavity, turbulent flow is often generated in the cavity, so that the air flow is influenced to smoothly pass through the cavity, and the air inlet efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: in order to overcome the problems in the prior art, the fresh air control system capable of improving the air inlet efficiency and the vertical window machine are provided.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: the utility model provides a fresh air control device, fresh air control device includes the fresh air subassembly, the fresh air subassembly is including the wind guide assembly and the intercommunication that have the wind chamber the air-supply line and the blast pipe of the relative both sides in wind chamber, the wind guide assembly is located including rotating the fresh air wind wheel in the wind chamber, the fresh air wind wheel is including locating body in the wind chamber and locating rotor blade on the body, the body will the wind chamber is separated and is located the first wind chamber and the second wind chamber of body both sides, rotor blade including accept in first blade in the first wind chamber with accept in the second blade in the second wind chamber, the air outlet of air-supply line with the air intake of blast pipe is all just to all sides of body set up.
Further, the number of the first blades is equal to that of the second blades, the first blades are arranged on the upper surface of the body at equal intervals, and the second blades are arranged on the lower surface of the body at equal intervals.
Further, the first blade and the second blade are both arc-shaped structures.
Furthermore, the fresh air component further comprises a base plate and a cover plate, the cover plate is covered on the base plate, and the air cavity is formed by the base plate and the space between the cover plates.
Furthermore, the fresh air component further comprises a fresh air motor, a through hole is formed in the chassis, and a fresh air motor shaft of the fresh air motor penetrates through the through hole and then is connected with the body.
Furthermore, an air inlet connecting piece connected with the air inlet pipe and an air supply connecting piece connected with the air supply pipe are further arranged on the base plate, two openings are arranged on two opposite sides of the wall of the air cavity, one of the openings is communicated with the air inlet connecting piece, and the other opening is communicated with the air supply connecting piece.
Furthermore, the fresh air control device further comprises a fresh air door assembly, the fresh air door assembly comprises a fixing plate and a sliding piece which is arranged on the fixing plate in a sliding mode, an air outlet is formed in the fixing plate, the air supply pipe is communicated with the air outlet, and the sliding piece can be used for closing or opening the air outlet.
Furthermore, new air door subassembly still includes new air door drive assembly, new air door drive assembly includes new air door motor and sets up the epaxial gear of new air door motor, be provided with the tooth's socket on the slider, the gear with the tooth's socket meshes mutually.
A vertical window machine further comprises the fresh air control device.
The utility model has the advantages that: the utility model provides a new trend control system and vertical window machine, the body of new trend wind wheel separates the wind chamber for being located the first wind chamber of body both sides and second wind chamber, and the air in first wind chamber and second wind chamber is at the in-process relative independence that flows, and the condition of mutual interference can not take place for the air of two wind intracavity, has avoided turbulent production, has guaranteed the smooth and easy flow of air to increased the intake, promoted air inlet efficiency.
Additionally, the utility model also provides a easy dismounting's fresh air control device and vertical window machine.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: a fresh air control device comprises a fresh air component and a fresh air door component, wherein the fresh air component is provided with a fresh air supply outlet, the fresh air door component comprises a fixed plate, a sliding part and a fresh air door driving component, the sliding part and the fresh air door driving component are arranged on the fixed plate in a sliding manner, the fixed plate is provided with an air outlet and a limiting groove, the air outlet is communicated with the fresh air supply outlet, sliding plates extend outwards from two sides of the fixed plate, the sliding plates are provided with clamping grooves, the sliding part is provided with a guide plate, a sliding groove corresponding to the sliding plate and a limiting part corresponding to the limiting groove, the guide plate is provided with a first limiting block corresponding to the clamping groove, when the clamping groove is aligned with the first limiting block, the limiting block is clamped into the limiting groove, the limiting part can slide in the limiting groove, the sliding part is provided with a tooth groove, the fresh air door driving component, the gear is engaged with the tooth groove.
Furthermore, the limiting groove is formed by protruding the surface of the fixing plate facing the fresh air component, the limiting groove corresponds to the limiting part protruding from the sliding part, and the limiting part slides in the limiting groove.
Furthermore, the guide plates are arranged on the edges of the two sides of the sliding part, the tooth grooves are formed in the guide plates, first limiting blocks are arranged on the inward side faces of the two guide plates respectively, a sliding groove is formed in the space among the first limiting blocks, the guide plates and the fixing plate, the sliding groove corresponds to the sliding plate, and the sliding plate slides in the sliding groove.
Furthermore, the axial direction of the motor shaft of the fresh air door and the normal direction of the fixed plate are perpendicular to the motor shaft.
Furthermore, the fixed plate of the new air door assembly is provided with an opening between the two limiting grooves, the opening forms a clamping groove, a third guide plate is arranged on the sliding part in a protruding mode at a position corresponding to the clamping groove, and the tooth socket is arranged on the third guide plate in the direction facing the fixed plate.
Further, the axial direction of the motor shaft of the fresh air door is parallel to or perpendicular to the normal direction of the fixing plate.
Further, new trend subassembly still includes air guide subassembly and all the air-supply line and the blast pipe be connected with air guide subassembly, air guide subassembly includes apron, chassis and new trend motor, the chassis inner chamber is equipped with the wind chamber, the wind intracavity is equipped with new trend wind wheel, is equipped with the through-hole in the chassis, the motor shaft one end of new trend motor is passed the through-hole with the new trend wind wheel is connected, the chassis be equipped with the air inlet connecting piece that the air-supply line is connected, keep away from air inlet connecting piece one end and with the air supply connecting piece that the blast pipe is connected, have two openings on the cavity body wall in wind chamber, an opening with air inlet connecting piece intercommunication, another opening with air supply connecting piece intercommunication.
Furthermore, the fresh air control system further comprises a controller, and the controller simultaneously controls the fresh air motor and the fresh air door motor to be opened or closed.
A vertical window air conditioner comprises the fresh air control device.
The utility model has the advantages that: the utility model provides a fresh air control device or vertical window machine, when screens groove and first stopper counterpoint, the spacing groove is gone into to the locating part card, and the locating part slides in the spacing groove, when realizing that fixed plate and sliding plate are connected, also can effectively avoid sliding plate and fixed plate separation, need not to connect the back at the sliding plate spacing through screws etc. simple, convenient of dismouting, the change of convenient follow-up maintenance and spare part.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a perspective view of a fresh air control device according to a first embodiment of the present invention;
FIG. 2 is an exploded view of the fresh air control device of FIG. 1;
FIG. 3 is a schematic structural diagram of a fresh air rotor in the fresh air control device shown in FIG. 2;
FIG. 4 is a schematic structural view of a fresh air door assembly in the fresh air control device shown in FIG. 1 (in an open air outlet state);
FIG. 5 is an exploded view of the fresh air door assembly of the fresh air control device of FIG. 4;
FIG. 6 is a schematic structural view of a fresh air door assembly in the fresh air control device shown in FIG. 4 (in a state where an air outlet is closed);
FIG. 7 is a circuit control diagram of the fresh air control device of the present invention;
fig. 8 is a perspective view of a fresh air door assembly of the fresh air control device according to the second embodiment of the present invention;
fig. 9 is a perspective view fresh air control device of a fresh air door assembly of the third embodiment of the present invention.
The names and the numbers of the parts in the figure are respectively as follows:
First stopper 222, sliding groove 223, stopper 224
Tooth slot 225 third guide plate 226 slot 227
Fresh air door motor shaft 232 gear 233 controller 301
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
Example one
Referring to fig. 1, a first embodiment of the present invention provides a vertical window air conditioner, which includes a fresh air control device, where the fresh air control device includes a fresh air component 100 and a fresh air door component 200, and the fresh air component 100 is connected to the fresh air door component 200.
The fresh air assembly 100 includes an air guide assembly 110, an air inlet pipe 120 connected to one end of the air guide assembly 110, and an air supply pipe 130 connected to the other end of the air guide assembly 110, wherein one end of the air inlet pipe 120, which is far away from the air supply pipe 130, is communicated to the outside, one end of the air supply pipe 130, which is far away from the air inlet pipe 120, is provided with an inner air outlet connector 131, the inner air outlet connector 131 is used for being connected with the fresh air door assembly 200, and in addition, a fresh air supply outlet (not shown) communicated with an inner cavity of the air supply pipe 130.
Referring to fig. 2, the air guiding assembly 110 includes a chassis 112, a cover plate 111 covering the chassis 112, a fresh air wind wheel 114 rotatably disposed in the chassis 112, and a fresh air motor 115 driving the fresh air wind wheel 114 to rotate, the chassis 112 is provided with a through hole (not shown), and a fresh air motor shaft 116 of the fresh air motor 115 passes through the through hole and then is connected to the fresh air wind wheel 114. The fresh air wind wheel 114 rotates under the driving of the fresh air motor 115, and a wind cavity 113 is arranged on the chassis 112 at a position surrounding the fresh air wind wheel 114, namely, the wind cavity 113 is formed by a space between the chassis 112 and the cover plate 111. In order to make the airflow flow more smoothly, preferably, the wind chamber 113 may be configured as a circular cavity, and when the cover plate 111 is covered on the chassis 112, the cover plate 111 closes an upper end opening of the wind chamber 113. The chassis 112 is further provided with an air inlet connecting piece 117 connected with the air inlet pipe 120 and an air supply connecting piece 118 connected with the air supply pipe 130, two openings (not shown) are arranged on two opposite sides of the cavity wall of the air cavity 113, one opening is communicated with the air inlet connecting piece 117, the air inlet connecting piece 117 is connected with the air inlet pipe 120, the air cavity 113 is communicated with the outside, the other opening of the air cavity 113 is communicated with the air supply connecting piece 118, the air supply connecting piece 118 is connected with the air supply pipe 130, the air cavity 113 is communicated with the fresh air 200 of the door assembly, and the two openings are arranged on two opposite sides of the cavity wall of the air cavity 113, so that smooth circulation of air flow in the air cavity 113 is facilitated.
When the air conditioner works, the fresh air motor 115 drives the fresh air wind wheel 114 to rotate, outdoor air enters the air inlet pipe 120 to reach the air cavity 113, and is discharged into the air supply pipe 130 from the air supply connecting piece 118 under the driving of the fresh air wind wheel 114, so that the outdoor air is discharged to the fresh air door assembly 200.
Referring to fig. 3, in a specific embodiment, the fresh air wind wheel 114 includes a body 1141 and a rotating blade 1142 installed on the body 1141, the body 1141 is connected to an output shaft of the fresh air motor 115, the body 1141 is substantially in a thin plate disc structure, the body 1141 partitions the air cavity 113 into a first air cavity and a second air cavity located at upper and lower sides of the body 1141, the rotating blade 1142 includes a first blade 1143 and a second blade 1144 installed on the body 1141, the first blade 1143 is contained in the first air cavity, the second blade 1144 is contained in the second air cavity, an air outlet of the air inlet pipe 120 and an air inlet of the air supply pipe 130 are both disposed opposite to the peripheral side of the body 1141, a central axis of the air outlet of the air inlet pipe 120 and a central axis of the air inlet of the air supply pipe 130 are both located on a central plane of the body 1141, and an upper surface and a lower surface of the body 1141 are symmetrically disposed.
Please during operation, the fresh air wheel 114 rotates, the air in the first air cavity is sent into the blast pipe 130 under the action of the first blade 1143, the air in the second air cavity is sent into the blast pipe 130 under the action of the second blade 1144, the air in the first air cavity and the air in the second air cavity are relatively independent in the flowing process, the air in the two air cavities cannot interfere with each other, the generation of turbulent flow is avoided, the smooth flowing of the air is ensured, thereby the air intake is increased, and the air intake efficiency is improved.
Further, the first blade 1143 and the second blade 1144 are each arc-shaped to accelerate the air flow. In addition, the number of the first blades 1143 is equal to that of the second blades 1143, and the first blades 1143 are arranged on the upper surface of the body 1141 at equal intervals, and the second blades 1144 are arranged on the lower surface of the body 1141 at equal intervals.
In addition, the thickness of the body 1141 is much smaller than the aperture of the air inlet duct 120 and the aperture of the air supply duct 130, so as to reduce the obstruction of the body 1141 to the air, and at the same time, to effectively separate the air flowing out through the air outlet of the air inlet duct 120.
The new air door assembly 200 includes a fixing plate 210, a sliding member 220 slidably disposed on the fixing plate 210, and a driving assembly 230 for driving the sliding member 220 to slide, wherein the fixing plate 210 is connected to the inner air outlet connector 131, the fixing plate 210 is provided with an air outlet 211, the inner air outlet connector 131 corresponds to the air outlet 211 and is connected to the fixing plate 210, and thus the air outlet 211 is communicated with a new air supply opening on the inner air outlet connector 131.
The sliding member 220 is disposed on a side of the fixing plate 210 away from the air guiding assembly 110, and the sliding member 220 slides relative to the fixing plate 210 to open or close the air outlet 211 by the sliding member 220.
Two sliding plates 213 extend outwards from two opposite sides of the fixing plate 210, the sliding plates 213 are provided with notches, the notches form a locking groove 214, the locking groove 214 divides the sliding plates 213 into two parts, and two limiting grooves 212 are disposed on the fixing plate 210 at the inner side of the sliding plates 213. Two position-limiting members 224 are disposed on a surface of the sliding member 220 facing the fixing plate 210, the position-limiting members 224 correspond to the position-limiting grooves 212, and when the sliding member 224 slides relative to the fixing plate 210, the position-limiting members 224 can slide along the position-limiting grooves 212. The two opposite sides of the edge of the sliding member 220 are convexly provided with the guide plate 221, specifically, a first limiting block 222 and a second limiting block 228 are arranged at the inner side surface of the guide plate 221, a sliding groove 223 corresponding to the sliding plate 213 of the fixing plate 210 is formed in the space between the first limiting block 222 and the second limiting block 228 and between the guide plate 221 and the fixing plate 210, when the sliding member 220 is installed on the fixing plate 210, the first limiting block 222 passes through the clamping groove 214, the limiting block 224 is simultaneously clamped into the limiting groove 212, the sliding plate 213 slides into the sliding groove 223, the sliding plate 213 slides in the sliding groove 223, and the sliding plate 213 and the sliding groove 223 are matched to guide the sliding of the sliding member 220. The arrangement of the locking groove 214 on the sliding plate 213 and the arrangement of the limiting member 224 and the limiting groove 212 make the installation of the sliding member 220 more convenient and skillful, and the cooperation of the sliding plate 213 and the sliding groove 223, in addition to the cooperation of the limiting member 224 and the limiting groove 212, not only plays the role of limiting and guiding, but also enables the sliding member 220 to slide more smoothly on the fixing plate 210, and the connection structure is also more stable. The guide plate 221 is provided with a tooth groove 225 at a side thereof away from the fixed plate 210. It is understood that the second stop block 228 may be omitted in other embodiments.
In order to make the fixed plate 210 tightly attached to the sliding member 220 without air leakage, sealing strips are disposed at the joint of the fixed plate 210 and the sliding member 220 and at the air outlet 211, and the sealing strips may be made of sealing materials such as rubber or silica gel.
The driving assembly 230 comprises a new air door motor 231 and two gears 233 which are fixed in the window, the axial direction of the new air door motor shaft 232 is vertical to the normal direction of the fixing plate 210, the number of the gears 233 is two, the two gears 233 are installed on the motor shaft 232 and are respectively meshed with the two tooth sockets 225 on the sliding part 220, when the new air door motor 231 runs, the new air door motor shaft 232 drives the gears 233 to rotate, and the tooth sockets 225 move relative to the gears 233, so that the sliding part 220 can move. When the fresh air control device is turned on, the fresh air door motor shaft 232 drives the gear 233 to rotate clockwise, so that the air outlet 211 is opened by the relative gear 233 of the tooth space 225 moving towards the direction far away from the air outlet 211, fresh air can be discharged from the air outlet 211, when the fresh air system needs to be closed, the fresh air door motor shaft 232 drives the gear 233 to rotate anticlockwise, and the air outlet 211 is closed by the relative gear 233 of the tooth space 225 moving towards the direction of the air outlet 211, as shown in fig. 5. In the new air door assembly 200, the sliding plate 213 is butted with the sliding groove 223, the gear 233 is meshed with the tooth groove 225 on the sliding member 220, so that the structure of the fixed plate 210 and the sliding member 220 in the matching operation is smoother and more stable, and the gear 233 drives the sliding member 220 to correspondingly slide on the fixed plate 210, so that the new air door assembly 200 has the advantages of simple connecting structure and stable driving.
Referring to fig. 7, the fresh air control device further includes a controller 301, wherein a user transmits a signal to the controller 301 through infrared rays or wifi, and the controller 301 controls the fresh air motor 115 and the fresh air door motor 231 to be turned on or turned off simultaneously after receiving the signal.
The during operation is seted up to the new trend system of vertical window machine, the user passes through infrared remote controller or wifi to the signal that the new trend system was opened in the transmission of controller 301, start new trend motor 115 and new trend door motor 231, new trend motor 115 drives the new trend wind wheel 114 rotation in the wind chamber 113 this moment, thereby outdoor new trend is inhaled air inlet connector 117 among the wind guide component 110 through air-supply line 120 under the effect of wind chamber 113 pressure and gets into wind chamber 113, because new trend door motor 231's operation, slider 220 is opened, wind chamber 113 has realized the intercommunication with the indoor space, under the effect of indoor and the 113 pressure differentials in wind chamber, make the new trend follow air supply connector 118 and discharge under the drive of new trend wind wheel 114, through blast pipe 103, the air outlet 211 of rethread new trend door assembly 200, discharge indoor.
The new trend controlling means's of this embodiment new trend door subassembly 200 dismouting is convenient, thereby the gear 233 on driving motor 231 rotates and can drive slider 220 and slide and realize opening of new trend door air outlet 211 closed, new trend door subassembly 200 simple structure, firm, easy dismounting, drive are stable.
Example two
Referring to fig. 8, the difference between the second embodiment and the first embodiment is: in this embodiment, the tooth space 225 on the fixing plate 210 is omitted, an opening is formed in the middle of the plate surface of the fixing plate 210 and between the two limiting grooves 212 to form a slot 227, the tooth spaces are not formed on the guide plates 221 on the two side edges of the fixing plate 210, a third guide plate 226 is disposed at a position corresponding to the middle of the sliding member 220, the third guide plate 226 slides up and down in the slot 227, the tooth space 225 is disposed on the surface of the third guide plate 226 facing the fixing plate 210, the driving assembly 230 includes a fresh air door motor 231 and gears 233, the axial direction of a motor shaft 232 of the fresh air door motor 231 is perpendicular to the normal direction of the fixing plate 210, the number of the gears 233 is one, and the gears 233 are.
EXAMPLE III
Referring to fig. 9, the difference between the third embodiment and the second embodiment is: in this embodiment, the fresh air door motor shaft 232 is axially arranged parallel to the normal direction of the fixing plate 210, the tooth groove 225 is formed in the side surface of the third guide plate 226, and the tooth groove 225 is engaged with the gear 233.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A new trend controlling means which characterized in that: fresh air controlling means includes the new trend subassembly, the new trend subassembly is including the air guide component and the intercommunication that have the wind chamber the air-supply line and the blast pipe of the relative both sides in wind chamber, the air guide component is located including rotating the new trend wind wheel in the wind chamber, the new trend wind wheel is including locating body in the wind chamber and locating rotor blade on the body, the body will the wind chamber is separated and is located the first wind chamber and the second wind chamber of body both sides, rotor blade including accept in first blade in the first wind chamber with accept in the second blade in the second wind chamber, the air outlet of air-supply line with the air intake of blast pipe is all just right all to all sides of body set up.
2. The fresh air control device as claimed in claim 1, wherein: the number of the first blades is equal to that of the second blades, the first blades are arranged on the upper surface of the body at equal intervals, and the second blades are arranged on the lower surface of the body at equal intervals.
3. The fresh air control device as claimed in claim 1, wherein: the first blade and the second blade are both arc-shaped structures.
4. A fresh air control device as claimed in any one of claims 1 to 3 wherein: the fresh air component further comprises a base plate and a cover plate, the cover plate is covered on the base plate, and the air cavity is formed by the base plate and a space between the cover plates.
5. The fresh air control device as claimed in claim 4, wherein: the fresh air component further comprises a fresh air motor, a through hole is formed in the chassis, and a fresh air motor shaft of the fresh air motor penetrates through the through hole and then is connected with the fresh air motor body.
6. The fresh air control device as claimed in claim 4, wherein: the chassis is also provided with an air inlet connecting piece connected with the air inlet pipe and an air supply connecting piece connected with the air supply pipe, two openings are arranged on two opposite sides of the cavity wall of the air cavity, one of the openings is communicated with the air inlet connecting piece, and the other opening is communicated with the air supply connecting piece.
7. The fresh air control device as claimed in claim 1, wherein: the fresh air control device further comprises a fresh air door assembly, the fresh air door assembly comprises a fixing plate and a sliding piece which is arranged on the fixing plate in a sliding mode, an air outlet is formed in the fixing plate, the air supply pipe is communicated with the air outlet, and the sliding piece can be closed or opened to close or open the air outlet.
8. The fresh air control device as claimed in claim 7, wherein: the new air door component further comprises a new air door driving component, the new air door driving component comprises a new air door motor and a gear arranged on the new air door motor shaft, a tooth groove is formed in the sliding part, and the gear is meshed with the tooth groove.
9. A vertical window machine is characterized in that: the window machine further comprises a fresh air control device of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921502091.3U CN210801410U (en) | 2019-09-10 | 2019-09-10 | Fresh air control device and vertical window machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921502091.3U CN210801410U (en) | 2019-09-10 | 2019-09-10 | Fresh air control device and vertical window machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210801410U true CN210801410U (en) | 2020-06-19 |
Family
ID=71227617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921502091.3U Active CN210801410U (en) | 2019-09-10 | 2019-09-10 | Fresh air control device and vertical window machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210801410U (en) |
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2019
- 2019-09-10 CN CN201921502091.3U patent/CN210801410U/en active Active
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