CN114017876A - Cyclic redundancy ventilation system and application - Google Patents
Cyclic redundancy ventilation system and application Download PDFInfo
- Publication number
- CN114017876A CN114017876A CN202111293847.XA CN202111293847A CN114017876A CN 114017876 A CN114017876 A CN 114017876A CN 202111293847 A CN202111293847 A CN 202111293847A CN 114017876 A CN114017876 A CN 114017876A
- Authority
- CN
- China
- Prior art keywords
- air
- duct
- return
- supply
- conditioning unit
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Duct Arrangements (AREA)
Abstract
The invention belongs to the technical field of air conditioning, and discloses a cyclic redundancy ventilation system and application thereof, wherein a system diagram comprises: an air conditioning unit; the air supply duct is butted with an air supply outlet of the air conditioning unit; the air return duct is butted with an air return inlet of the air conditioning unit; the air supply air guide pipe is butted with the opening of the air supply air channel; the return air guide pipe is butted with the opening of the return air duct; and the mounting bracket is used for mounting and fixing. The system of the invention is mainly applied to circulating ventilation in various operation square cabins or compartments and redundant backup ventilation under special conditions.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a cyclic redundancy ventilation system and application thereof.
Background
The description of the background of the invention pertaining to the related art to which this invention pertains is given for the purpose of illustration and understanding only of the summary of the invention and is not to be construed as an admission that the applicant is explicitly or implicitly admitted to be prior art to the date of filing this application as first filed with this invention.
In a conventional operation shelter or compartment, a ceiling-mounted air conditioning unit is generally provided, and air supply and return of the air conditioning unit are both arranged at the overhead part. Two or more air conditioning units are arranged in the larger square cabin. During the use process, the following problems are often caused:
when a person works in the shelter or the carriage body, the air supply of the air conditioner is often directly blown to the top of the head, so that the person feels uncomfortable; air supply and return air ports of the air conditioner are concentrated at one or two positions, so that the problems of air cross, short circuit of an air path and the like are easily caused, the refrigerating effect in the cabin is poor, the cold and the heat in the space are not uniform, and the body feeling of people is not comfortable; when the air conditioner in a certain space of the large shelter or the carriage body cannot normally work due to an accident, a redundant backup mode is not available; when the overhead air conditioning unit directly supplies air, the noise of the internal circulating fan is directly transmitted into the square cabin or the carriage body without passing through an air duct.
Disclosure of Invention
The circulating air mode can effectively and uniformly send cold air of an air conditioning unit into the square cabin or the carriage body, one side of the circulating air supplies air, the other side of the circulating air supplies air, and the air does not directly blow the top of the head of a person, so that the discomfort of the person is avoided; the air duct comprises a guide plate, an air valve and the like, and redundant backup air supply in different spaces can be realized under unexpected conditions; the noise of the air conditioning unit can be effectively isolated and reduced by the mute plate arranged in the air duct.
The purpose of the embodiment of the invention is realized by the following technical scheme:
a cyclic redundancy ventilation system comprising:
an air conditioning unit;
the air supply duct is butted with an air supply outlet of the air conditioning unit;
the air return duct is butted with an air return inlet of the air conditioning unit;
the air supply air guide pipe is butted with the opening of the air supply air channel;
the return air guide pipe is butted with the opening of the return air duct;
and the mounting bracket is used for mounting and fixing.
The air duct guide plate is arranged in the air supply duct and the air return duct, and the air duct guide plate in the air supply duct is arranged at the butt joint of the air supply duct and an air supply outlet of the air conditioning unit; and the air duct guide plate in the return air duct is arranged at the butt joint of the return air duct and the return air inlet of the air conditioning unit.
Furthermore, when the ventilation device is used for ventilation of a plurality of spaces, the ventilation device further comprises an air duct internal air valve, the air duct internal air valve is arranged in the air supply air duct and the air return air duct, and the position of the air duct internal air valve corresponds to the position of the partition between the plurality of spaces.
Further, the air duct silencer further comprises an air duct inner silencer plate, and the average distance of the air duct inner silencer plate is 0.5-2 m.
Furthermore, the air supply duct is formed by connecting a plurality of modularized air supply duct sections; the return air duct is formed by connecting a plurality of modularized return air duct sections.
Furthermore, sound absorption materials are arranged on the inner wall of the air supply duct; and the inner wall of the return air duct is provided with a sound-absorbing material.
Furthermore, an air duct arc-shaped guide plate is arranged between the air supply air duct and the air conditioning unit.
Furthermore, the air supply duct is detachably connected with an air supply outlet of the air conditioning unit; the air return duct is detachably connected with an air return inlet of the air conditioning unit.
Further, the cyclic redundancy ventilation system comprises an interior trim part for shielding.
In another aspect, embodiments of the present invention provide for the use of a redundant circulatory system, as described above, mounted to the top of a cabin or enclosure for air conditioning via mounting brackets.
The embodiment of the invention has the following beneficial effects:
by adopting the cyclic redundancy ventilation system, cold air can be uniformly sent to one side in the shelter or the carriage body, and air is returned from the other side after heat in the space is taken away, so that 'short circuit of an air path' is completely avoided;
the air duct and the air guide pipe can form a static pressure cavity to ensure uniform air pressure, so that uniform and slow air speed of each air outlet is ensured, and a direct blowing head is not arranged, so that people feel more comfortable;
the silencing plate and the sound-absorbing cotton are arranged in the air conditioner, so that the noise energy of the air conditioner unit can be effectively consumed, and a good silencing effect is achieved;
meanwhile, redundant ventilation in two independent spaces can be realized by using the louver valves and the control equipment, and the reliability of the equipment is ensured.
Drawings
FIG. 1 is a schematic view of the supply and return air duct (return air duct side) in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of the supply and return air ducts (supply air duct side) according to an embodiment of the present invention;
FIG. 3 is an illustration of an exemplary manner of ventilation in a typical shelter or compartment in one embodiment of the present invention;
FIG. 4 is an illustration of an exemplary redundant back-up ventilation scheme in a typical shelter or compartment in one embodiment of the present invention;
FIG. 5 is a schematic illustration of a baffle within an air duct in one embodiment of the present invention;
FIG. 6 is an illustration of a silencer panel within an air duct in an embodiment of the present invention;
FIG. 7 is a schematic representation of the connection of modular air duct components in accordance with an embodiment of the present invention;
FIG. 8 is a schematic view of a louver damper in an air duct in an embodiment of the present invention;
icon: 1-an air supply duct, 2-a return air duct, 3-an air conditioning unit, 4-a mounting bracket, 5-a return air guide duct, 6-an air supply guide duct, 7-a shelter or a compartment body, 8-a shelter or a compartment body interior trim part and 9-the air flow direction of a circulating ventilation mode; 10-air duct arc guide plate; 11-typical shelter or compartment partitions; 12-air duct internal air valve; 13-air duct man-shaped guide plate; 14-an air duct inner silencing plate; 15-cold air flow guiding direction is indicated; 16-a modular duct assembly attachment flange; 17-air flow direction at mute panel schematic.
Detailed Description
The present application is further described below with reference to examples.
In the following description, different "one embodiment" or "an embodiment" may not necessarily refer to the same embodiment, in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art. Various embodiments may be replaced or combined, and other embodiments may be obtained according to the embodiments without creative efforts for those skilled in the art.
With reference to fig. 1-2, a cyclic redundancy ventilation system comprising:
an air conditioner 3;
the air supply duct 1 is butted with an air supply outlet of the air conditioning unit;
the return air duct 2 is butted with a return air inlet of the air conditioning unit;
the air supply air guide pipe 6 is butted with the opening of the air supply air channel;
the return air guide pipe 5 is butted with an opening of the return air duct;
and the mounting bracket 4 is used for mounting and fixing. The air duct can be fixed with the top and the side wall of the shelter or the carriage body through the mounting bracket.
The device of the invention uniformly sends the cold air of the air conditioning unit to the inner side of one side wall of the square cabin, and the return air is pumped back to the air conditioning unit through the inner side of the other side wall of the square cabin or the carriage body, thereby forming a good circulation effect in the square cabin or the carriage body.
In some embodiments of the present invention, in order to avoid the generation of vortex and wind noise in the air duct, a deflector 13 is disposed inside the air supply duct to effectively divide the air supply direction of the cold air of the air conditioning unit, and fig. 5 shows a schematic view of the man-shaped deflector 13 in a certain section of the modularized air supply duct 1 assembly. The human-shaped guide plate 13 is in a human shape, is fixedly installed in the air supply duct 1, is set at a specific position according to the flowing demand of cold air, and is mainly installed at a cold air vertical turning position. When the air conditioning unit 3 blows out cold air, the cold air is naturally distributed to the length direction of the air supply duct 1 according to the shape of the cold air when passing through the human-shaped guide plate 13, and eddy current cannot be formed inside the air supply duct, so that the refrigeration efficiency is not influenced, and the wind noise is also avoided. The air duct guide plate 13 is arranged in the air supply air duct 1 and the air return air duct 2, and the air duct guide plate 13 in the air supply air duct 1 is arranged at the butt joint of the air supply air duct 1 and an air supply outlet of the air conditioning unit 3; and an air duct guide plate 13 in the return air duct 2 is arranged at the butt joint of the return air duct 2 and a return air inlet of the air conditioning unit 3. In order to ensure uniform air outlet effect, the sectional area of the air supply duct is matched with the air volume of the air conditioning unit, and a static pressure cavity can be formed in the space volume of the air supply duct, so that basically constant air pressure is kept in the air supply duct, and uniform air outlet speed and air volume can be ensured at a large-distance air supply air outlet position. Fig. 1 and 2 show an exemplary structure of a duct installation to which the cyclic redundancy ventilation method of the present invention is applied. The example includes an air supply duct 1, a return air duct 2, an air supply duct 6, a return air duct 5, and a mounting bracket 4. The air conditioning unit 3 is an exemplary typical air conditioning unit. The air supply duct 1 and the air return duct 2 use rubber sealing rings to press the air supply return opening and the air return opening of the air conditioning unit 3 in butt joint so as to ensure the maintainability of the air conditioning unit and facilitate the disassembly. The air supply guide pipe 6 and the opening of the air supply air duct 1 are fixedly installed by using aluminum rivets, the air return guide pipe 5 and the opening of the air return air duct 2 are fixedly installed by using aluminum rivets, and the installed butt joint surface needs to use silicone sealant so as to ensure the sealing property between the air guide pipe and the air duct.
In some embodiments of the present invention, when the ventilation device is used for ventilation of multiple spaces, the ventilation device further includes an air duct internal air valve 12, the air duct internal air valve 12 is disposed in the supply air duct 1 and the return air duct 2, and the position of the air duct internal air valve 12 corresponds to the partition position between the multiple spaces. Fig. 4 shows an example of the redundant application of the cyclic redundancy ventilation and air ducts of the present invention to a typical shelter or compartment 7. As shown in fig. 4, a partition 11 of a typical shelter or compartment divides the shelter or compartment 7 into two independent spaces, and according to the position of the partition 11, louvered air valves 12 are installed inside the air supply duct 1 and the air return duct 2, and in a normal state, both the air valves 12 are in a closed state, so that the air supply duct 1 and the air return duct 2 are actually two independent ducts, and the two air conditioning units 3 respectively refrigerate the two independent spaces. When one of the air conditioning units 3 stops working due to an accident, the control device can open the air valves 12 arranged in the air supply duct 1 and the air return duct 2, and at the moment, the other air conditioning unit 3 which normally works can still send cold air into the whole air supply duct 1, so that redundant backup is realized. Figure 8 shows a schematic view of the damper 12 mounted within the duct. According to the practical application layout of the air duct in the shelter or the carriage body 7, the flange flanging on the air valve 12 is used at the corresponding position of the partition 11 in the air duct and is fixedly installed with the air supply duct 1 and the air return duct 2. The control cable of the air valve 12 is connected with the control equipment in the shelter or the carriage body 7, and is manually controlled to be opened or closed, so that the separation or communication of the interiors of the air supply duct 1 and the air return duct 2 and the redundant backup ventilation of two independent spaces are realized.
In some embodiments of the invention, the silencing air duct is used for effectively isolating and reducing the noise of the air conditioning unit, the silencing plate is arranged in the air duct, the average distance is about 1m, and sound-absorbing cotton with the thickness of 15mm is attached to the interior of all the air ducts, so that the noise energy of the air conditioning unit can be consumed in the air duct, and the silencing effect is achieved. Fig. 6 shows a schematic view of the sound-deadening panel 14 installed in the supply air duct 1. Two silencing plates 14 are fixedly arranged in each modularized air supply duct 1 component, and the two silencing plates 14 are respectively arranged on the inner sides of the upper surface and the lower surface of the air supply duct 1. The height of the sound-deadening plate 14 is about half the height of the supply air duct 1, and when the cool air flows through the supply air duct 1, the air flow direction indication 17 at the sound-deadening plate shown in fig. 6 of the sound-deadening plate 14 is bypassed. In the process, the sound-absorbing board 14 and the heat-insulating sound-absorbing cotton attached to the inside of the air supply duct 1 can absorb and consume the noise transmitted by the circulating fan of the air conditioning unit 3, so that the sound absorption and noise reduction are realized, and the silencing effect is achieved.
In some embodiments of the present invention, the air supply duct is formed by connecting a plurality of modular air supply duct sections; the return air duct is formed by connecting a plurality of modularized return air duct sections. FIG. 3 is a schematic view of a typical shelter or compartment with a cyclically redundant air duct embodying the present invention installed therein; the length, the width and the height of the square cabin or the carriage body are not particularly specified, and different components can be reasonably matched according to the internal size of the square cabin or the carriage body so as to be convenient to install and use. As shown in fig. 3, the air supply duct 6 and the air return duct 5 are fixed to the air supply duct 1 and the air return duct 2 by rivets, and then the air supply duct 1 and the air return duct 2 are fixed to the top and the side wall of the shelter or the box body 7 by screws through the mounting bracket 4. The length of the air supply duct 1 and the number of the air supply guide pipes 6 are determined according to the length of the shelter or the carriage body 7, the required air speed and the cooling efficiency. Fig. 7 shows the connection and installation of the modular supply air duct 1 or return air duct 2 assembly. The length of the modular assembly is 1200mm, which maximizes the use of the area of standard sheet material. According to the practical application layout of the air duct in the shelter or the carriage body 7, different numbers of the components of the air supply duct 1 and the components of the air return duct 2 are selected and matched, and openings are formed at the positions of the air supply air guide pipe 6 and the air return air guide pipe 5 where cold air needs to circulate. And then the modular components are connected and fixed by using connecting flanges 16 through rivets, and silicone sealant is required to be used for the butt joint surfaces of the connecting flanges 16 to ensure the sealing property between the components. The flange plates are arranged between the air duct sections, so that the air duct tightness can be improved, and the air duct can be conveniently assembled.
In some embodiments of the invention, the inner wall of the air supply duct is provided with a sound absorption material; and the inner wall of the return air duct is provided with a sound-absorbing material.
In some embodiments of the present invention, an air duct arc-shaped guide plate is disposed between the air supply duct and the air conditioning unit.
In some embodiments of the present invention, the air supply duct is detachably connected to the air supply outlet of the air conditioning unit; the air return duct is detachably connected with an air return inlet of the air conditioning unit.
In some embodiments of the invention, the redundant circulatory ventilation system includes interior trim for shading. After all the air duct components related to the invention are installed, interior trim parts 8 are generally installed to ensure the attractiveness; meanwhile, the interior trim 8 can partially shield or hide the air supply air guide pipe 6 and the return air guide pipe 5 according to requirements.
In another aspect, embodiments of the present invention provide for the use of a redundant circulatory system, as described above, mounted to the top of a cabin or enclosure for air conditioning via mounting brackets.
The non-limited parts of the invention can be realized by selecting the means commonly used in the field according to the needs of the skilled in the art, such as the number of the air guide pipes, the material and the size of each part, and the like, and are not described in detail herein.
It should be noted that the above embodiments can be freely combined as necessary. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A cyclic redundancy ventilation system, comprising:
an air conditioning unit;
the air supply duct is butted with an air supply outlet of the air conditioning unit;
the air return duct is butted with an air return inlet of the air conditioning unit;
the air supply air guide pipe is butted with the opening of the air supply air channel;
the return air guide pipe is butted with the opening of the return air duct;
and the mounting bracket is used for mounting and fixing.
2. The cyclic redundancy ventilation system of claim 1, further comprising an air duct guide plate, wherein the air duct guide plate is arranged in the air supply duct and the air return duct, and the air duct guide plate in the air supply duct is arranged at the butt joint of the air supply duct and the air supply outlet of the air conditioning unit; and the air duct guide plate in the return air duct is arranged at the butt joint of the return air duct and the return air inlet of the air conditioning unit.
3. The system according to claim 1, further comprising an air duct internal air valve, when the ventilation device is used for ventilation of a plurality of spaces, the air duct internal air valve is arranged in the supply air duct and the return air duct, and the air duct internal air valve position corresponds to the partition position between the plurality of spaces.
4. The system of claim 1, further comprising an acoustic panel within the air chute, wherein the acoustic panel is spaced an average distance of 0.5-2m within the air chute.
5. The system of claim 1, wherein the supply air duct is formed by connecting a plurality of modular supply air duct sections; the return air duct is formed by connecting a plurality of modularized return air duct sections.
6. The system of claim 4, wherein the inner wall of the air supply duct is provided with sound absorbing material; and the inner wall of the return air duct is provided with a sound-absorbing material.
7. The system of claim 1, wherein an air duct arc baffle is disposed between the supply air duct and the air conditioning unit.
8. The system according to claim 1, wherein the air supply duct is detachably connected to the air supply outlet of the air conditioning unit; the air return duct is detachably connected with an air return inlet of the air conditioning unit.
9. The system of claim 1, wherein the system includes interior trim components for covering.
10. Use of a redundant circulatory ventilation system according to any of claims 1 to 9 for air conditioning purposes, wherein the redundant circulatory ventilation system is mounted to the top of the cabin or box by means of mounting brackets.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111293847.XA CN114017876A (en) | 2021-11-03 | 2021-11-03 | Cyclic redundancy ventilation system and application |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111293847.XA CN114017876A (en) | 2021-11-03 | 2021-11-03 | Cyclic redundancy ventilation system and application |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114017876A true CN114017876A (en) | 2022-02-08 |
Family
ID=80060127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111293847.XA Pending CN114017876A (en) | 2021-11-03 | 2021-11-03 | Cyclic redundancy ventilation system and application |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114017876A (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0979634A (en) * | 1995-09-20 | 1997-03-28 | Matsushita Seiko Co Ltd | Heat-exchange apparatus for heat-exchange air |
CN2508164Y (en) * | 2001-12-06 | 2002-08-28 | 张鲁渝 | Silencing ventilator |
CN202046176U (en) * | 2011-04-27 | 2011-11-23 | 霍山东科科技开发有限公司 | External spiral wind pipe type variable cross-section air supply system |
CN204214032U (en) * | 2014-10-22 | 2015-03-18 | 广东芬尼克兹节能设备有限公司 | A kind of home bathroom heating dehumidification system |
CN206387036U (en) * | 2016-12-12 | 2017-08-08 | 珠海格力电器股份有限公司 | Air handling system |
CN109028435A (en) * | 2018-06-08 | 2018-12-18 | 北京金茂绿建科技有限公司 | Novel air supply device |
-
2021
- 2021-11-03 CN CN202111293847.XA patent/CN114017876A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0979634A (en) * | 1995-09-20 | 1997-03-28 | Matsushita Seiko Co Ltd | Heat-exchange apparatus for heat-exchange air |
CN2508164Y (en) * | 2001-12-06 | 2002-08-28 | 张鲁渝 | Silencing ventilator |
CN202046176U (en) * | 2011-04-27 | 2011-11-23 | 霍山东科科技开发有限公司 | External spiral wind pipe type variable cross-section air supply system |
CN204214032U (en) * | 2014-10-22 | 2015-03-18 | 广东芬尼克兹节能设备有限公司 | A kind of home bathroom heating dehumidification system |
CN206387036U (en) * | 2016-12-12 | 2017-08-08 | 珠海格力电器股份有限公司 | Air handling system |
CN109028435A (en) * | 2018-06-08 | 2018-12-18 | 北京金茂绿建科技有限公司 | Novel air supply device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10775074B2 (en) | Sound attenuating air handler panel apparatus and method | |
US9004995B1 (en) | Wall curb for air treatment system | |
US8336672B2 (en) | Air treatment and sound reduction system | |
EP0594882B1 (en) | Ventilating apparatus for conveyance | |
CN113928358A (en) | Low-noise air conditioner air duct of railway passenger car | |
JP2006256383A (en) | Railway vehicle | |
KR101766253B1 (en) | Marine Air-conditioning Unit | |
CN114017876A (en) | Cyclic redundancy ventilation system and application | |
CN111361583B (en) | Air conditioner air duct for double-layer motor train unit | |
JP6211675B1 (en) | Whole building air conditioning system | |
JP2732487B2 (en) | Vehicle ventilation system | |
KR20100049772A (en) | Middle-ceiling structure having cooled and heated air duct assembly for railway vehicle | |
JP4228279B2 (en) | Floor blowing air conditioning system | |
CN216481532U (en) | Air conditioner static pressure device under seat of slope-raising stand | |
JP3948468B2 (en) | Air conditioner | |
CN211503197U (en) | Noise reduction processing device of central air conditioning unit | |
CN113859287A (en) | Low-noise air-conditioning ventilation system of railway passenger car | |
JP3462147B2 (en) | Arrangement structure of air-conditioning duct in railway vehicles | |
KR101702223B1 (en) | A railway vehicles for duct have the function even distribution | |
JP3071928B2 (en) | Air purifier | |
CN218431246U (en) | Air return and supply integrated air duct structure | |
CN218368169U (en) | Fan anechoic room structure of mail steamer and ship | |
US11378305B2 (en) | Noise reducing air duct | |
JP3462407B2 (en) | Air conditioner | |
CN219838624U (en) | Hood and vehicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |