CN111674236A - Air conditioning duct system, air conditioning system and transportation tool - Google Patents
Air conditioning duct system, air conditioning system and transportation tool Download PDFInfo
- Publication number
- CN111674236A CN111674236A CN202010601730.2A CN202010601730A CN111674236A CN 111674236 A CN111674236 A CN 111674236A CN 202010601730 A CN202010601730 A CN 202010601730A CN 111674236 A CN111674236 A CN 111674236A
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- air
- duct
- air duct
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00557—Details of ducts or cables
- B60H1/00564—Details of ducts or cables of air ducts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00371—Air-conditioning arrangements specially adapted for particular vehicles for vehicles carrying large numbers of passengers, e.g. buses
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention provides an air conditioning duct system, an air conditioning system and a transportation vehicle, wherein the air conditioning duct system comprises a duct assembly, the duct assembly comprises an outer duct and an inner duct, the inner duct is arranged in the outer duct in a penetrating manner, an outer duct is formed between the outer duct and the inner duct, the inner duct is internally provided with an inner duct extending along the length direction of the inner duct, the peripheral wall of the outer duct is provided with a first ventilation opening, and one end of the inner duct is provided with a second ventilation opening. The air conditioning duct system can improve the uniformity of the ambient temperature in the carriage.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner air duct system, an air conditioner system and a transportation tool.
Background
The existing air conditioner of the passenger car is usually arranged at the top of the passenger car, an air outlet and an air return inlet of the air conditioner are communicated with the interior of the passenger car, an internal heat exchanger and an external heat exchanger of the passenger car are arranged on the same side of the air conditioner, air is discharged from two sides of the air conditioner, air returns in the middle of the air conditioner, and fresh air is avoided. Because the air supply outlet and the air return inlet are both arranged at the roof part, the density of hot air is lower than that of cold air in the heating process, so that the air supply distribution of the air conditioner is mainly concentrated at the top of the passenger car, the temperature of the head of a passenger is far higher than that of the feet of the passenger, and the riding comfort of the passenger is reduced. Meanwhile, the air outlet and the air return inlet of the air conditioner of the passenger car are mainly located in the rear half part of the passenger car, so that the temperature of a driver and the temperature of a front-row passenger are far higher than the temperature of a rear row when the driver refrigerates, and the temperature of the front-row passenger is far lower than the temperature of the rear row when the driver heats, and the driver experience of the driver is very poor.
Disclosure of Invention
A first object of the present invention is to provide an air conditioning duct system that improves temperature uniformity.
The second purpose of the invention is to provide an air conditioning system with the air conditioning duct system.
The third purpose of the invention is to provide a transportation tool with the air conditioning duct system.
In order to achieve the first object, the present invention provides an air conditioning duct system, which includes a duct assembly; the air duct assembly comprises an outer air duct and an inner air duct, the inner air duct is arranged in the outer air duct in a penetrating mode, an outer air duct is formed between the outer air duct and the inner air duct, the inner air duct extending along the length direction of the inner air duct is arranged in the inner air duct, a first ventilation opening is formed in the peripheral wall of the outer air duct, and a second ventilation opening is formed in one end of the inner air duct.
According to the scheme, the cold air or the hot air in different air channels can be respectively conveyed to the respective preset positions by arranging the double-layer pipelines, so that the uniformity of the ambient temperature is improved.
The air-conditioning air duct system comprises an upper air duct and a lower air duct, wherein the upper air duct comprises an outer air duct and an inner air duct, and the lower air duct also comprises an outer air duct and an inner air duct.
The further proposal is that the air duct component also comprises an air return inlet, a heat exchange port and a reversing valve. The reversing valve is positioned at one end of the air duct assembly, which is far away from the second ventilation opening; the reversing valve can be switched between a first communication state and a second communication state; when the reversing valve is in a first communication state, the upper air duct is communicated with the heat exchange port, and the lower air duct is communicated with the air return port; when the reversing valve is in the second communication state, the upper air duct is communicated with the air return opening, and the lower air duct is communicated with the heat exchange opening.
Therefore, during refrigeration, the reversing valve is in a first communication state, the upper air duct is communicated with the heat exchange port, the lower air duct is communicated with the air return port, cold air is blown downwards from the upper part, and return air enters the air return port from the first ventilation port of the lower air duct. When heating, the reversing valve is in a second communication state, the upper air channel is communicated with the air return opening, the lower air channel is communicated with the heat exchange opening, hot air is blown upwards from the lower part, and return air enters the air return opening from the first air vent of the upper air channel, so that the temperature uniformity is improved.
The further scheme is that the reversing valve comprises a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with the upper air duct, the second interface is communicated with the lower air duct, the third interface is communicated with the air return opening, and the fourth interface is communicated with the heat exchange opening.
The further scheme is that the first interface and the second interface are arranged oppositely, the third interface and the fourth interface are arranged oppositely, and the axis of the first interface is perpendicular to the axis of the third interface.
Therefore, the quick switching of the reversing valve is convenient to realize.
Preferably, the first ventilation opening of the upper air duct is arranged downwards, and the first ventilation opening of the lower air duct is arranged upwards.
It can be seen that rapid diffusion of the cold or hot air out of the first vent is facilitated.
In a preferred embodiment, the outer air duct and the inner air duct are arranged coaxially.
Preferably, the number of the first ventilation openings is multiple, and the multiple first ventilation openings are uniformly arranged along the length direction of the outer air pipe.
Therefore, the uniformity of the ambient temperature in the length direction of the upper air duct is ensured.
In order to achieve the second objective, the present invention provides an air conditioning system, which includes the air conditioning duct system.
In order to achieve the third objective, the present invention provides a transportation vehicle, which includes the air conditioning duct system.
According to a preferred scheme, the transportation tool further comprises a compartment, a driver position is arranged at the front portion in the compartment, the air duct assembly extends from the rear portion of the compartment to the front portion of the compartment, and the inner air duct extends forwards to a position close to the driver position.
Therefore, the pipe wall of the inner air pipe is not provided with the hole, the inner air duct directly sends air to the driver position and the front row passenger position, air is mainly supplied to the driver and the front row passenger, and the problems that the temperature is high when the driver and the front row passenger position refrigerate and the temperature is low when the driver and the front row passenger position heat are solved. The outer air duct supplies air to the middle and rear passengers. Thereby ensuring the uniformity of the ambient temperature in the front and back directions of the carriage.
Drawings
FIG. 1 is a schematic structural view of an embodiment of the transportation vehicle of the present invention.
FIG. 2 is a schematic structural diagram of a reversing valve in a first communicating state in an embodiment of an air conditioning duct system of the present invention.
FIG. 3 is a schematic diagram of a diverter valve in a second communication state according to an embodiment of the air conditioning duct system of the present invention.
FIG. 4 is a left side view of a portion of an upper duct of an embodiment of an air conditioning duct system of the present invention.
FIG. 5 is a bottom view of a portion of an upper duct in an embodiment of an air conditioning duct system of the present invention.
FIG. 6 is a left side view of a portion of a lower duct in an embodiment of an air conditioning duct system of the present invention.
FIG. 7 is a top view of a portion of a lower duct in an embodiment of an air conditioning duct system of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
Referring to fig. 1, the transportation vehicle of the present embodiment is a passenger car, and the passenger car includes a cabin 1 and an air conditioning system, and the air conditioning system includes an air conditioning unit 7 and an air conditioning duct system 10.
The air-conditioning air duct system 10 comprises an air duct assembly, a return air inlet 4, a heat exchange port 5 and a reversing valve 6. The air duct assembly comprises two upper air ducts 2 and two lower air ducts 3. The two upper air ducts 2 are arranged at the top 11 in the compartment 1 and are respectively positioned above the left and right seats in the compartment 1, and the lower air duct 3 is arranged at the bottom 12 in the compartment 1 and is respectively positioned below the left and right seats in the compartment 1. The air conditioning unit 7, the air return opening 4 and the heat exchange opening 5 are all located at the rear portion 14 of the compartment 1, the air return opening 4 is communicated with an air return cavity 71 of the air conditioning unit 7, the heat exchange opening 5 is communicated with a heat exchange cavity 72 of the air conditioning unit 7, the upper air duct 2 and the lower air duct 3 both extend from the rear portion 14 of the compartment 1 to the front portion 13 of the compartment 1, the front portion 13 in the compartment 1 is provided with a driver position 15, and the upper air duct 2 and the lower air duct 3 both extend forwards to a position close to the driver position 15. An upper air duct 2 is connected with the corresponding lower air duct 3 through a reversing valve 6.
Referring to fig. 1 to 3, the direction valve 6 includes a first port 61, a second port 62, a third port 63, and a fourth port 64, the first port 61 is communicated with the upper duct 2 through a first connection pipe 81, the second port 62 is communicated with the lower duct 3 through a second connection pipe 82, the third port 63 is communicated with the return air inlet 4 through a third connection pipe 83, and the fourth port 64 is communicated with the heat exchange port 5 through a fourth connection pipe 84. The first port 61 and the second port 62 are oppositely arranged, the third port 63 and the fourth port 64 are oppositely arranged, and the axis of the first port 61 is perpendicular to the axis of the third port 63. The direction valve 6 is switchable between a first communication state and a second communication state. When the reversing valve 6 is in the first communication state, as shown in fig. 2, the upper air duct 2 is communicated with the heat exchange port 5, and the lower air duct 3 is communicated with the air return port 4; as shown in fig. 3, when the reversing valve 6 is in the second communication state, the upper air duct 2 is communicated with the air return opening 4, and the lower air duct 3 is communicated with the heat exchange opening 5.
Referring to fig. 4 and 5, the upper duct 2 includes an outer duct 21 and an inner duct 22 coaxially disposed, and the outer duct 21 and the inner duct 22 are fixedly connected by a plurality of supporting members (not shown) arranged along a length direction of the lower duct 2. The cross section of outer tuber pipe 21 and interior tuber pipe 22 all is the rectangle, and interior tuber pipe 22 is worn to establish in outer tuber pipe 21, forms outer wind channel 23 between outer tuber pipe 21 and the interior tuber pipe 22, has seted up the interior wind channel 24 that extends along the length direction of interior tuber pipe 22 in the interior tuber pipe 22, is provided with first vent 211 on the perisporium of outer tuber pipe 21, and first vent 211 sets up down. The number of the first ventilation openings 211 is plural, and the plural first ventilation openings 211 are uniformly arranged along the length direction of the external air duct 21. The wall of the inner air duct 22 is not provided with a hole, and the axial end of the inner air duct 22 far away from the reversing valve 6 is provided with a second ventilation opening 221.
Referring to fig. 6 and 7, the lower duct 3 includes an outer duct 31 and an inner duct 32 coaxially disposed, and the outer duct 31 and the inner duct 32 are fixedly connected by a plurality of supporting members (not shown) arranged along a length direction of the lower duct 3. The cross sections of the outer air pipe 31 and the inner air pipe 32 are rectangular, the inner air pipe 32 is arranged in the outer air pipe 31 in a penetrating mode, a second outer air duct 33 is formed between the outer air pipe 31 and the inner air pipe 32, a second inner air duct 34 extending along the length direction of the inner air pipe 32 is arranged in the inner air pipe 32, a first vent 311 is arranged on the peripheral wall of the outer air pipe 31, and the first vent 311 is arranged upwards. The number of the first ventilation openings 311 is plural, and the plural first ventilation openings 311 are uniformly arranged along the length direction of the external air duct 31. A second ventilation opening 321 is arranged at one end of the inner air pipe 32 far away from the reversing valve 6.
The air conditioning duct system 10 of the present invention has two air supply modes, i.e., an up-feeding and down-returning mode and a down-feeding and up-returning mode.
An up-sending and down-returning air mode: during refrigeration, the reversing valve 6 is in a first communication state, the upper air duct 2 is communicated with the heat exchange port 5, the lower air duct 3 is communicated with the air return port 4, and cold air coming out of the heat exchange port 5 enters the upper air duct 2. Because the air supply temperature is lower and the density is higher, the air supply is easy to blow from the upper part to the lower part, so that the temperature sensed by the head and the feet of the passengers is more uniform. In addition, a part of the cold air from the heat exchange port 5 enters the inner air duct 24, a part of the cold air enters the outer air duct 23, the cold air entering the inner air duct 24 directly blows to the driver and the front passengers through the second air vents 221 at the end parts to cool the driver and the front passengers, and the cold air entering the outer air duct 23 blows to the middle and rear passengers through the plurality of first air vents 211 on the tube wall of the outer air duct 21. The in-vehicle return air enters the return air inlet 4 through the first vent 311 of the lower duct 3.
Downward feeding and upward returning air mode: when heating, the reversing valve 6 is in a second communication state, the upper air duct 2 is communicated with the air return opening 4, the lower air duct 3 is communicated with the heat exchange opening 5, and hot air coming out of the heat exchange opening 5 enters the lower air duct 3. Because the air supply temperature is higher and the density is lower, the air supply is easy to blow from the lower part to the upper part, so that the temperature sensed by the head and the feet of the passengers is more uniform. In addition, a part of the hot air from the heat exchanging port 5 enters the second inner air duct 34, a part of the hot air enters the second outer air duct 33, the hot air entering the second inner air duct 34 is directly blown to the driver and the front passengers through the second air vents 321 at the end parts, the temperature of the driver and the front passengers is raised, and the hot air entering the second outer air duct 33 is blown to the middle and rear passengers through the plurality of first air vents 311 on the tube wall of the outer air duct 31. The return air in the vehicle enters the return air inlet 4 through the first ventilation opening of the upper air duct 2, so that the uniformity of the internal environment temperature of the carriage can be ensured through the arrangement of the inner air duct 24, the outer air duct 23, the second inner air duct 34 and the second outer air duct 33.
Therefore, an upper air duct and lower air duct air return mode is adopted, an air supply mode of feeding air from bottom to top is adopted during heating, and hot air is blown to the head from the feet; during refrigeration, an air supply mode of feeding air from top to bottom is adopted, cold air is blown to the feet from the head, so that the temperature of the head and the feet is basically consistent, and the problem of large temperature difference between the head and the feet is solved. The pipe wall of the inner air pipe is not provided with a hole, the inner air pipe directly sends air to a driver position and a front passenger position, air is mainly supplied to the driver and the front passenger, and the problems that the temperature is high when the driver and the front passenger position refrigerate and the temperature is low when the driver and the front passenger position heat are solved. The outer air duct supplies air to the middle and rear passengers, so that the uniformity of the ambient temperature in the front and rear directions of the carriage is ensured.
In addition, the cross sections of the outer air pipe and the inner air pipe can be circular. The number and the shape of the first ventilation openings formed in the peripheral wall of the outer air pipe can be changed according to actual requirements. The one end that outer wind channel stretches to driver's position can be the confined also can have the opening, if closed structure, interior tuber pipe passes the end wall of this outer tuber pipe and to the anterior air supply of railway carriage, if open structure, interior wind channel and outer wind channel are simultaneously to the anterior air supply of railway carriage, because the air in the outer wind channel has been sent to the middle of through first vent and back row passenger position on, so send the anterior wind of railway carriage very little from outer wind channel, mainly still send cold air or hot-air to the railway carriage front portion through interior wind channel. The second ventilation opening can also be arranged on the peripheral wall of one end of the inner air pipe far away from the reversing valve, and the second ventilation opening is communicated with the first ventilation opening on the peripheral wall of the outer air pipe through a connecting pipe, or the second ventilation opening is arranged opposite to the first ventilation opening in the radial direction; the number of the second ventilation openings and the proportion of the part of the inner air pipe provided with the second ventilation openings to the total length of the inner air pipe can be changed according to actual needs. The second ventilation opening sets up including on the perisporium of the one end of tuber pipe keeping away from the switching-over valve, and also can set up the baffle between outer tuber pipe and the interior tuber pipe, the baffle falls into anterior segment and back end with outer wind channel, the second ventilation opening is located the anterior segment, the anterior segment is close to the driver position, the anterior segment is to the anterior driver of railway carriage and passenger air supply, anterior segment and back end all are provided with first vent, the first vent of anterior segment and the second ventilation opening intercommunication of anterior segment, the back end is to the middle and back row passenger air supply of railway carriage. The second ventilation opening can also be arranged on the end wall of one end of the inner air pipe far away from the reversing valve and the peripheral wall of one end of the inner air pipe far away from the reversing valve. The above-described modifications also achieve the object of the present invention.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, not limitations, and various changes and modifications may be made by those skilled in the art, without departing from the spirit and scope of the invention, and any changes, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be embraced therein.
Claims (11)
1. The air conditioning air duct system comprises an air duct assembly;
the method is characterized in that:
the air duct assembly comprises an outer air duct and an inner air duct, the inner air duct is arranged in the outer air duct in a penetrating mode, an outer air duct is formed between the outer air duct and the inner air duct, the inner air duct extending along the length direction of the inner air duct is formed in the inner air duct, a first ventilation opening is formed in the peripheral wall of the outer air duct, and a second ventilation opening is formed in one end of the inner air duct.
2. The air conditioning duct system of claim 1, wherein:
the air duct assembly comprises an upper air duct and a lower air duct, the upper air duct comprises the outer air pipe and the inner air pipe, and the lower air duct also comprises the outer air pipe and the inner air pipe.
3. The air conditioning duct system of claim 2, wherein:
the air-conditioning air duct system also comprises an air return inlet, a heat exchange port and a reversing valve;
the reversing valve is positioned at one end of the air duct assembly, which is far away from the second ventilation opening;
the reversing valve can be switched between a first communication state and a second communication state;
when the reversing valve is in the first communication state, the upper air duct is communicated with the heat exchange port, and the lower air duct is communicated with the air return port;
when the reversing valve is in the second communication state, the upper air duct is communicated with the air return opening, and the lower air duct is communicated with the heat exchange opening.
4. An air conditioning duct system according to claim 3, wherein:
the reversing valve comprises a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with the upper air duct, the second interface is communicated with the lower air duct, the third interface is communicated with the air return opening, and the fourth interface is communicated with the heat exchange opening.
5. The air conditioning duct system of claim 4, wherein:
the first interface and the second interface are arranged oppositely, the third interface and the fourth interface are arranged oppositely, and the axis of the first interface is perpendicular to the axis of the third interface.
6. An air conditioning duct system according to any of claims 2 to 5, characterized in that:
the first ventilation opening of going up the wind channel sets up down, the first ventilation opening of wind channel sets up down.
7. An air conditioning duct system according to any of claims 1 to 5, characterized in that:
the outer air pipe and the inner air pipe are coaxially arranged.
8. An air conditioning duct system according to any of claims 1 to 5, characterized in that:
the number of the first ventilation openings is multiple, and the first ventilation openings are uniformly arranged along the length direction of the outer air pipe.
9. Air conditioning system, characterized in that it comprises an air conditioning duct system according to any of claims 1 to 8.
10. Vehicle, characterized in that it comprises an air-conditioning duct system according to any one of claims 1 to 8.
11. The vehicle of claim 10, wherein:
the vehicle further comprises a carriage, a driver position is arranged on the front portion in the carriage, the air duct assembly extends from the rear portion of the carriage to the front portion of the carriage, and the inner air duct extends forwards to a position close to the driver position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010601730.2A CN111674236A (en) | 2020-06-29 | 2020-06-29 | Air conditioning duct system, air conditioning system and transportation tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010601730.2A CN111674236A (en) | 2020-06-29 | 2020-06-29 | Air conditioning duct system, air conditioning system and transportation tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111674236A true CN111674236A (en) | 2020-09-18 |
Family
ID=72456834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010601730.2A Pending CN111674236A (en) | 2020-06-29 | 2020-06-29 | Air conditioning duct system, air conditioning system and transportation tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111674236A (en) |
Citations (9)
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| CN202294167U (en) * | 2011-10-17 | 2012-07-04 | 安徽安凯汽车股份有限公司 | Quenching system of passenger car drive zone of low drive zone |
| CN202879189U (en) * | 2012-07-10 | 2013-04-17 | 郑州宇通客车股份有限公司 | Passenger car and air-conditioning air return channel structure thereof |
| CN104334944A (en) * | 2012-04-23 | 2015-02-04 | X畅尔股份有限公司 | Environmental control systems and methods of configuring environmental control systems |
| EP2868545A1 (en) * | 2012-06-27 | 2015-05-06 | Mitsubishi Electric Corporation | Railway-vehicle total-heat-exchange ventilation system |
| CN106515360A (en) * | 2016-10-20 | 2017-03-22 | 珠海格力电器股份有限公司 | Vehicle overhead air conditioner air duct system, vehicle overhead air conditioner and vehicle |
| US20180015809A1 (en) * | 2016-07-15 | 2018-01-18 | TransArctic Canada, Inc. | Adaptable roof-mounted air conditioning system for vehicles |
| KR101928334B1 (en) * | 2015-07-01 | 2018-12-12 | 한온시스템 주식회사 | Air distributing system for the third and/or fourth zone of a three- or four zones-air conditioning appliance of automobile |
| CN208263926U (en) * | 2018-05-18 | 2018-12-21 | 珠海格力电器股份有限公司 | A kind of car and its hvac system |
| CN109823137A (en) * | 2019-01-24 | 2019-05-31 | 珠海格力电器股份有限公司 | Coach air conditioner |
-
2020
- 2020-06-29 CN CN202010601730.2A patent/CN111674236A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202294167U (en) * | 2011-10-17 | 2012-07-04 | 安徽安凯汽车股份有限公司 | Quenching system of passenger car drive zone of low drive zone |
| CN104334944A (en) * | 2012-04-23 | 2015-02-04 | X畅尔股份有限公司 | Environmental control systems and methods of configuring environmental control systems |
| EP2868545A1 (en) * | 2012-06-27 | 2015-05-06 | Mitsubishi Electric Corporation | Railway-vehicle total-heat-exchange ventilation system |
| CN202879189U (en) * | 2012-07-10 | 2013-04-17 | 郑州宇通客车股份有限公司 | Passenger car and air-conditioning air return channel structure thereof |
| KR101928334B1 (en) * | 2015-07-01 | 2018-12-12 | 한온시스템 주식회사 | Air distributing system for the third and/or fourth zone of a three- or four zones-air conditioning appliance of automobile |
| US20180015809A1 (en) * | 2016-07-15 | 2018-01-18 | TransArctic Canada, Inc. | Adaptable roof-mounted air conditioning system for vehicles |
| CN106515360A (en) * | 2016-10-20 | 2017-03-22 | 珠海格力电器股份有限公司 | Vehicle overhead air conditioner air duct system, vehicle overhead air conditioner and vehicle |
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| CN109823137A (en) * | 2019-01-24 | 2019-05-31 | 珠海格力电器股份有限公司 | Coach air conditioner |
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Application publication date: 20200918 |
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| RJ01 | Rejection of invention patent application after publication |