CN212319942U - Fresh air heat exchange ventilation device based on central air-conditioning control system - Google Patents
Fresh air heat exchange ventilation device based on central air-conditioning control system Download PDFInfo
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- CN212319942U CN212319942U CN201922371436.2U CN201922371436U CN212319942U CN 212319942 U CN212319942 U CN 212319942U CN 201922371436 U CN201922371436 U CN 201922371436U CN 212319942 U CN212319942 U CN 212319942U
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- 238000009423 ventilation Methods 0.000 title claims abstract description 36
- 238000004378 air conditioning Methods 0.000 title claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 238000001179 sorption measurement Methods 0.000 claims description 11
- 239000011941 photocatalyst Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 5
- 208000027418 Wounds and injury Diseases 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 4
- 208000014674 injury Diseases 0.000 abstract description 4
- 239000002365 multiple layer Substances 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 241000883990 Flabellum Species 0.000 description 2
- 239000011111 cardboard Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003434 inspiratory effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a new trend heat transfer ventilation unit based on central air conditioning control system, the power distribution box comprises a box body, one side intercommunication of box has the air-supply line to one side intercommunication at box top has the fresh air pipe, the equal fixedly connected with fixed plate in both sides between box inner wall top and the bottom to top fixedly connected with between two relative one sides of fixed plate returns the board, two bottom fixedly connected with bottom plate between the relative one side of fixed plate, the utility model relates to an air conditioning ventilation technical field. This new trend heat transfer ventilation unit based on central air conditioning control system, one side intercommunication through the box has the air-supply line, discharges the air that external world got into indoor again after the multiple-layer filtering, the impurity in the air that has significantly reduced reduces the injury to the human body, through the equal fixedly connected with fixed plate in both sides between box inner wall top and the bottom, conveniently changes or washs the filter, operates comparatively convenient and fast, keeps the normal use of filter.
Description
Technical Field
The utility model relates to an air conditioner ventilation technical field specifically is a new trend heat transfer ventilation unit based on central air conditioning control system.
Background
The central air conditioner is a large-scale air conditioning system, the system is composed of a host machine and a terminal, the host machine is divided into a water cooling unit and an air cooling unit, the terminal equipment is mainly composed of an air conditioning unit and a fan coil, the central air conditioner is also a Freon VRV air conditioning unit serving as a refrigerant, the central air conditioner is different from a common household air conditioner, the central air conditioner can be used by a large-scale building, an air conditioning fresh air system is one of three air circulation systems of the air conditioner, namely an indoor air circulation system, an outdoor air circulation system and a fresh air system, the fresh air system mainly plays a role in realizing circulation and ventilation between room air and outdoor air and has an air purifying function, indoor and outdoor air are discharged to the outside through a fresh air system pipeline to form pressure difference, indoor and outdoor air exchange is finished, air is fresh, the small-sized machine uses more, the central air conditioner generally uses axial flow fans, ventilation is also called as air exchange, and is characterized by that it uses mechanical or natural method to feed enough fresh air into indoor space, and at the same time discharges the dirty air which is not in accordance with the sanitary requirements, so that the indoor air can meet the sanitary requirements and production process requirements, and every facilities for implementing ventilation work in the building are called as ventilation equipment, ventilation equipment includes exhaust fan, scavenger fan and blower, etc. and can be divided into industrial one and domestic one, and the blower can be divided into high one, medium one, low one and negative one.
When new trend heat transfer operation in the central air conditioning, the air that directly gets into with the external world carries out simple filtration and just carries out heat treatment, and the mode can make to contain more impurity in the indoor air of entering like this, and long-term the inspiratory, has certain injury to the human body, and the filter is inconvenient to be dismantled in addition and washs, has increased the operation degree of difficulty, and a position is aimed at to the wind gap when blowing, is unfavorable for the quick circulation of room air.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a new trend heat transfer ventilation unit based on central air conditioning control system, when having solved new trend heat transfer operation in the central air conditioning, directly carry out simple filtration with the air that external entering just carries out heat treatment, the mode can make to contain more impurity in the indoor air of entering like this, long-term inspiratory, there is certain injury to the human body, and the filter is inconvenient dismantles the washing, the operation degree of difficulty has been increased, a position is aimed at in the wind gap when blowing, be unfavorable for the problem of the quick circulation of room air.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a fresh air heat exchange ventilation device based on a central air-conditioning control system comprises a box body, wherein one side of the box body is communicated with an air inlet pipe, one side of the top of the box body is communicated with a fresh air pipe, two sides between the top and the bottom of the inner wall of the box body are fixedly connected with fixed plates, the top between the opposite sides of the two fixed plates is fixedly connected with a return plate, the bottom between the opposite sides of the two fixed plates is fixedly connected with a bottom plate, one side of the two fixed plates opposite is fixedly connected with a clamping plate, a filter plate is slidably connected between the opposite sides of the two clamping plates, a nano photocatalyst decomposition net is fixedly connected between the top and the bottom of the inner wall of the box body, an active carbon adsorption net is fixedly connected between the top and the bottom of the inner wall of the box body and positioned at one side of, and a heating wire is fixedly connected between the top and the bottom of the inner wall of the box body.
Preferably, one end of the air inlet pipe is fixedly connected with an air inlet hopper, and one side of the air inlet hopper is fixedly connected with a dust screen.
Preferably, a fixing frame is fixedly connected between the top and the bottom of the inner wall of the box body and positioned on the right side of the activated carbon adsorption net, a fan is fixedly connected inside the fixing frame, and a protective net is arranged on the surface of the fixing frame.
Preferably, the box inner wall between the top and the bottom and be located the right side fixedly connected with riser of fixed frame, the inside rotation of riser is connected with the dwang to the fixed surface of dwang is connected with the flabellum.
Preferably, a frame is fixedly connected to the right side of the inner wall of the box body between the top and the bottom of the inner wall of the box body and inside the box body, a movable rod is rotatably connected between the two sides of the inner wall of the frame, and a movable plate is fixedly connected to the surface of the movable rod.
Preferably, one end of the movable rod penetrates through the outer frame and extends to the outside of the outer frame, the surface of the movable rod, which extends to one end of the outside of the outer frame, is fixedly connected with a driving wheel, the surface of the driving wheel is connected through a driving belt in a driving mode, one side of the surface of the movable rod is fixedly connected with a first bevel gear, one side of the bottom of the inner wall of the box body is fixedly connected with a motor, and the output end of the motor is fixedly connected with a second bevel gear meshed with the first bevel gear.
Preferably, the top of the box body is provided with a through hole at a position corresponding to the filter plate, the through hole is movably connected with a sealing plate inside, the vent is movably connected with a ventilation plate inside, and one side of the ventilation plate is fixedly connected with a connecting plate.
Preferably, the equal fixedly connected with mounting panel in both sides of bottom half to the both sides at mounting panel top all are provided with the installed part.
Advantageous effects
The utility model provides a new trend heat transfer ventilation unit based on central air conditioning control system. Compared with the prior art, the method has the following beneficial effects:
(1) the fresh air heat exchange ventilation device based on the central air-conditioning control system is characterized in that an air inlet pipe is communicated with one side of a box body, a fresh air pipe is communicated with one side of the top of the box body, fixed plates are fixedly connected with two sides between the top and the bottom of the inner wall of the box body, a return plate is fixedly connected with the top between two opposite sides of the fixed plates, a bottom plate is fixedly connected with the bottom between two opposite sides of the fixed plates, clamping plates are fixedly connected with one opposite sides of the two clamping plates, a filter plate is slidably connected between the two opposite sides of the two clamping plates, a nano photocatalyst decomposition net is fixedly connected between the top and the bottom of the inner wall of the box body, an active carbon adsorption net is fixedly connected between the top and the bottom of the inner wall of the box body and positioned on one side of the nano photocatalyst decomposition net, a vent is, greatly reduces the impurities in the air and reduces the harm to the human body.
(2) This new trend heat transfer ventilation unit based on central air conditioning control system, through the equal fixedly connected with fixed plate in both sides between box inner wall top and the bottom, and top fixedly connected with between the relative one side of two fixed plates returns the shape board, bottom fixedly connected with bottom plate between the relative one side of two fixed plates, and the equal fixedly connected with cardboard in the relative one side of two fixed plates, sliding connection has the filter between the relative one side of two cardboards, the top of box just is located the corresponding position of filter and has seted up the through-hole, the inside swing joint of through-hole has the closing plate, the convenience is changed or is washd the filter, the operation is comparatively convenient and fast, keep the normal use of filter.
(3) The fresh air heat exchange ventilation device based on the central air-conditioning control system is characterized in that an outer frame is fixedly connected on the right side between the top and the bottom of the inner wall of the box body and positioned in the box body, a movable rod is rotatably connected between the two sides of the inner wall of the outer frame, a movable plate is fixedly connected on the surface of the movable rod, one end of the movable rod penetrates through the outer frame and extends to the outside of the outer frame, a driving wheel is fixedly connected on the surface of one end of the movable rod extending to the outside of the outer frame, the surface of the driving wheel is connected with the driving wheel through a driving belt, one side of the surface of the movable rod is fixedly connected with a first bevel gear, and one side of the bottom of the inner wall of the box body is fixedly connected with a motor, the output end of the motor is fixedly connected with a second bevel gear meshed with the first bevel gear, through the movable plate which swings up and down, the discharged wind can be uniformly discharged, and the circulation of indoor air is kept.
Drawings
FIG. 1 is a perspective view of the structure of the present invention;
FIG. 2 is a cross-sectional view of the structure of the present invention;
fig. 3 is a side view of the fixing frame structure of the present invention;
fig. 4 is a side view of the outer frame structure of the present invention;
fig. 5 is a side view of the riser structure of the present invention;
fig. 6 is a perspective view of the structure of the filter plate of the present invention;
fig. 7 is a perspective view of the ventilation board structure of the present invention.
In the figure: 1-box body, 2-air inlet pipe, 3-fresh air pipe, 4-fixed plate, 5-return plate, 6-bottom plate, 7-clamping plate, 8-filter plate, 9-nano photocatalyst decomposing net, 10-active carbon adsorbing net, 11-ventilation opening, 12-air inlet hopper, 13-dust-proof net, 14-fixed frame, 15-fan, 16-protective net, 17-vertical plate, 18-rotating rod, 19-fan blade, 20-outer frame, 21-movable rod, 22-movable plate, 23-driving wheel, 24-driving belt, 25-first bevel gear, 26-motor, 27-second bevel gear, 28-through hole, 29-sealing plate, 30-ventilation plate, 31-connecting plate, 32-mounting plate, 32-dust-proof net, 33-mounting piece, 34-heating wire.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: a new wind heat exchange ventilation device based on a central air-conditioning control system comprises a box body 1, one side of the box body 1 is communicated with an air inlet pipe 2, one side of the top of the box body 1 is communicated with a new wind pipe 3, two sides between the top and the bottom of the inner wall of the box body 1 are fixedly connected with fixing plates 4, the top between the opposite sides of the two fixing plates 4 is fixedly connected with a return plate 5, the bottom between the opposite sides of the two fixing plates 4 is fixedly connected with a bottom plate 6, one opposite side of the two fixing plates 4 is fixedly connected with a clamping plate 7, a filter plate 8 is slidably connected between the opposite sides of the two clamping plates 7, a nano photocatalyst decomposition net 9 is fixedly connected between the top and the bottom of the inner wall of the box body 1, the nano photocatalyst technology is a nano bionic technology and is used for environmental purification, self-cleaning materials, advanced new energy sources, cancer, between the top of box 1 inner wall and the bottom and be located one side fixedly connected with active carbon adsorption net 10 of nanometer photocatalyst decomposition net 9, active carbon adsorption is the physical adsorption who utilizes the active carbon, chemical adsorption, the water treatment method of oxidation, performances such as catalytic oxidation and reduction get rid of aquatic pollutant, the air that gets into with the external world is indoor again after multilayer filtration, the impurity in the air that has significantly reduced, reduce the injury to the human body, vent 11 has been seted up to the opposite side of box 1, fixedly connected with heater strip 34 between the top of box 1 inner wall and the bottom.
The utility model discloses in, the one end fixedly connected with air inlet hopper 12 of air-supply line 2 to one side fixedly connected with dust screen 13 of air inlet hopper 12.
The utility model discloses in, the fixed frame 14 of right side fixedly connected with that just is located active carbon adsorption net 10 between the top of 1 inner wall of box and the bottom, the inside fixedly connected with fan 15 of fixed frame 14 to the surface of fixed frame 14 is provided with protection network 16.
The utility model discloses in, just be located the right side fixedly connected with riser 17 of fixed frame 14 between the top of 1 inner wall of box and the bottom, the inside of riser 17 is rotated and is connected with dwang 18 to the fixed surface of dwang 18 is connected with flabellum 19.
The utility model discloses in, just be located the inside right side fixedly connected with frame 20 of box 1 between the top of box 1 inner wall and the bottom, rotate between the both sides of frame 20 inner wall and be connected with movable rod 21 to the fixed surface of movable rod 21 is connected with fly leaf 22, through luffing motion's fly leaf 22, can be so that exhaust wind can even discharge, keeps the circulation of room air.
The utility model discloses in, the one end of movable rod 21 runs through frame 20 and extends to the outside of frame 20, the fixed surface that movable rod 21 extended to the outside one end of frame 20 is connected with drive wheel 23, and the surface of drive wheel 23 passes through drive belt 24 transmission and connects, the first bevel gear 25 of one side fixedly connected with on movable rod 21 surface, and one side fixedly connected with motor 26 of box 1 inner wall bottom, motor 26's output fixedly connected with and the second bevel gear 27 of first bevel gear 25 engaged with.
The utility model discloses in, the top of box 1 just is located the corresponding position of filter 8 and has seted up through-hole 28, and the inside swing joint of through-hole 28 has closing plate 29, and the convenience is changed or is washd filter 8, operates comparatively convenient and fast, keeps filter 8's normal use, and the inside swing joint of vent 11 has ventilating board 30, one side fixedly connected with connecting plate 31 of ventilating board 30.
The utility model discloses in, the equal fixedly connected with mounting panel 32 in both sides of box 1 bottom to the both sides at mounting panel 32 top all are provided with installed part 33.
And those not described in detail in this specification are well within the skill of those in the art.
When the device is used, the whole device is fixed at a place needing to be used through the mounting piece 33 and the mounting plate 32, the vent 11 is connected with an indoor unit of a central air conditioner, the external power supply is connected, gas enters the inside of the box body 1 through the air inlet pipe 2 and the air inlet hopper 12, the dust screen 13 can filter the air, meanwhile, fresh air is fed into the inside of the box body 1 through the fresh air pipe 3, the gas in the air sequentially passes through the filter plate 8, the nano photocatalyst decomposition net 9 and the crystal activated carbon adsorption net 10, so that the volatile organic gas in the air is subjected to oxidative decomposition and sterilization, the generation of smelling gas can be properly controlled, the peculiar smell in the air is eliminated, the fan 15 is started through an external switch, the filtered air is driven by the fan 15 to blow towards the position of the vent, the fan blades 19 can also rotate under the blowing of the fan 15, the circulation of the air is accelerated, and when, the heating wire 34 is started to heat, hot air is discharged through the vent 11, the sealing plate 29 is taken down when the filter plate 8 is needed to be cleaned, then the filter plate 9 is taken out from the middle of the two clamping plates 7, the cleaning and drying are carried out, then the two clamping plates 7 are placed in between, and the sealing plate 29 is inserted into the through hole 28.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a new trend heat transfer ventilation unit based on central air conditioning control system, includes box (1), its characterized in that: one side of the box body (1) is communicated with an air inlet pipe (2), one side of the top of the box body (1) is communicated with a fresh air pipe (3), two sides between the top and the bottom of the inner wall of the box body (1) are fixedly connected with fixing plates (4), the top between the opposite sides of the two fixing plates (4) is fixedly connected with a return plate (5), the bottom between the opposite sides of the two fixing plates (4) is fixedly connected with a bottom plate (6), one opposite side of the two fixing plates (4) is fixedly connected with a clamping plate (7), a filter plate (8) is slidably connected between the opposite sides of the two clamping plates (7), a nano photocatalyst decomposing net (9) is fixedly connected between the top and the bottom of the inner wall of the box body (1), and one side positioned between the top and the bottom of the inner wall of the box body (1) and positioned on the nano photocatalyst decomposing net (9) is fixedly connected, the ventilation opening (11) has been seted up to the opposite side of box (1), fixedly connected with heater strip (34) between the top of box (1) inner wall and the bottom.
2. The fresh air heat exchange ventilation device based on the central air-conditioning control system as claimed in claim 1, characterized in that: one end of the air inlet pipe (2) is fixedly connected with an air inlet hopper (12), and one side of the air inlet hopper (12) is fixedly connected with a dust screen (13).
3. The fresh air heat exchange ventilation device based on the central air-conditioning control system as claimed in claim 1, characterized in that: the activated carbon adsorption net is characterized in that a fixing frame (14) is fixedly connected to the right side of the activated carbon adsorption net (10) and between the top and the bottom of the inner wall of the box body (1), a fan (15) is fixedly connected to the inside of the fixing frame (14), and a protective net (16) is arranged on the surface of the fixing frame (14).
4. The fresh air heat exchange ventilation device based on the central air-conditioning control system as claimed in claim 3, characterized in that: the box is characterized in that a vertical plate (17) is fixedly connected to the right side of the fixed frame (14) and located between the top and the bottom of the inner wall of the box body (1), a rotating rod (18) is rotatably connected to the inside of the vertical plate (17), and fan blades (19) are fixedly connected to the surface of the rotating rod (18).
5. The fresh air heat exchange ventilation device based on the central air-conditioning control system as claimed in claim 1, characterized in that: the box comprises a box body (1), wherein a right side fixedly connected with outer frame (20) is arranged between the top and the bottom of the inner wall of the box body (1) and positioned inside the box body (1), a movable rod (21) is rotatably connected between two sides of the inner wall of the outer frame (20), and a movable plate (22) is fixedly connected to the surface of the movable rod (21).
6. The fresh air heat exchange ventilation device based on the central air-conditioning control system as claimed in claim 5, characterized in that: one end of the movable rod (21) runs through the outer frame (20) and extends to the outside of the outer frame (20), the movable rod (21) extends to the surface fixedly connected with driving wheel (23) of the outside one end of the outer frame (20), the surface of the driving wheel (23) is in transmission connection through a driving belt (24), one side of the surface of the movable rod (21) is fixedly connected with a first bevel gear (25), one side of the bottom of the inner wall of the box body (1) is fixedly connected with a motor (26), and the output end of the motor (26) is fixedly connected with a second bevel gear (27) meshed with the first bevel gear (25).
7. The fresh air heat exchange ventilation device based on the central air-conditioning control system as claimed in claim 1, characterized in that: the box is characterized in that the top of the box body (1) is located at a position corresponding to the filter plate (8) and is provided with a through hole (28), the inside of the through hole (28) is movably connected with a sealing plate (29), the inside of the ventilation opening (11) is movably connected with a ventilation plate (30), and one side of the ventilation plate (30) is fixedly connected with a connecting plate (31).
8. The fresh air heat exchange ventilation device based on the central air-conditioning control system as claimed in claim 1, characterized in that: the equal fixedly connected with mounting panel (32) in both sides of box (1) bottom to the both sides at mounting panel (32) top all are provided with installed part (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922371436.2U CN212319942U (en) | 2019-12-26 | 2019-12-26 | Fresh air heat exchange ventilation device based on central air-conditioning control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922371436.2U CN212319942U (en) | 2019-12-26 | 2019-12-26 | Fresh air heat exchange ventilation device based on central air-conditioning control system |
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| Publication Number | Publication Date |
|---|---|
| CN212319942U true CN212319942U (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922371436.2U Expired - Fee Related CN212319942U (en) | 2019-12-26 | 2019-12-26 | Fresh air heat exchange ventilation device based on central air-conditioning control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457491A (en) * | 2019-12-26 | 2020-07-28 | 江苏哪凉快网络科技有限公司 | Fresh air heat exchange ventilation device based on central air-conditioning control system |
-
2019
- 2019-12-26 CN CN201922371436.2U patent/CN212319942U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457491A (en) * | 2019-12-26 | 2020-07-28 | 江苏哪凉快网络科技有限公司 | Fresh air heat exchange ventilation device based on central air-conditioning control system |
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Granted publication date: 20210108 |