CN109237625A - A kind of air-cooled ducted air conditioner - Google Patents
A kind of air-cooled ducted air conditioner Download PDFInfo
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- CN109237625A CN109237625A CN201810850294.5A CN201810850294A CN109237625A CN 109237625 A CN109237625 A CN 109237625A CN 201810850294 A CN201810850294 A CN 201810850294A CN 109237625 A CN109237625 A CN 109237625A
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- evaporator
- cooled ducted
- air conditioner
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- 238000005192 partition Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
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- 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
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
Abstract
The present invention provides a kind of air-cooled ducted air conditioners, including shell and it is set to the intracorporal spiral case of the shell, evaporator and drip tray, the spiral case is equipped with spiral case outlet frame, the lower section of the evaporator is arranged in the drip tray, there is angle between each position of the spiral case outlet frame and horizontal direction, wherein the smallest angle of angle is the first established angle, and the value of first established angle is a, and a is between 10 °~15 °.Air-cooled ducted air conditioner of the present invention has adjusted the assembly relation inside air-cooled ducted air conditioner between each component, increases the design of setting angle, overall noise value is reduced, also guarantees the downward outlet air of air-cooled ducted air conditioner, facilitates the comfort for promoting user, also the exchange capability of heat for further promoting air-cooled ducted air conditioner, reaches energy-efficient purpose.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of air-cooled ducted air conditioner.
Background technique
Air-duct-type air-conditioner machine is concealed air-conditioning, is commonly called as air-cooled ducted air conditioner, air-cooled ducted air conditioner due to price is lower, unit eer compared with
Height is convenient for introducing fresh air, therefore applied widely.Air-cooled ducted air conditioner include shell and be mounted on the intracorporal spiral case of shell, evaporator and
Drip tray is provided with centrifugal wind wheel in spiral case, and evaporator is opposite with spiral case air outlet, and drip tray is installed on base of evaporator.It is existing
The design of typically no setting angle, unreasonable structure between some each components of air-cooled ducted air conditioner, influence heat exchange efficiency, and when use generates
Biggish noise.
Summary of the invention
In view of this, the present invention is directed to propose a kind of air-cooled ducted air conditioner, to solve the problems, such as that air-cooled ducted air conditioner noise is big in the prior art.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of air-cooled ducted air conditioner, including shell and it is set to the intracorporal spiral case of the shell, evaporator and drip tray, on the spiral case
Equipped with spiral case outlet frame, the lower section of the evaporator, each position of spiral case outlet frame and level side is arranged in the drip tray
There is angle between, wherein the smallest angle of angle is the first established angle, and the value of first established angle is a, a between
Between 10 °~15 °.
Further, a is 12 °.
Further, the evaporator is asymmetric V evaporator comprising upper evaporator and lower evaporator.
Further, the angle between the upper evaporator and the lower evaporator is the second established angle, second installation
The value at angle is b, and the b is between 65 °~75 °.
Further, the b is 70 °.
Further, the upper evaporator and the angle of the shell horizontal direction are third established angle, the third peace
The value for filling angle is c, and the c is between 25 °~45 °.
Further, the c is 27 °.
Further, the upper evaporator and the lower evaporator length are different.
Further, partition is equipped in the shell, shell is divided into front chamber and rear chamber, the evaporation by the partition
Device and the nearest horizontal distance of the partition are D, and the horizontal width of the front chamber is B, the value of ratio D/B between 0.35~
Between 0.45.
Further, the value of the ratio D/B is 0.42.
Compared with the existing technology, air-cooled ducted air conditioner of the present invention has the advantage that
Air-cooled ducted air conditioner of the present invention has adjusted the assembly relation inside air-cooled ducted air conditioner between each component, increases setting angle
Design, reduces overall noise value, also guarantees the downward outlet air of air-cooled ducted air conditioner, facilitates the comfort for promoting user, also further mentions
The exchange capability of heat for rising air-cooled ducted air conditioner, reaches energy-efficient purpose.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the cross-sectional view one of air-cooled ducted air conditioner described in the embodiment of the present invention；
Fig. 2 is the cross-sectional view two of air-cooled ducted air conditioner described in the embodiment of the present invention.
Description of symbols:
1- shell, 11- air outlet, 12- partition, 13- front chamber, 14- rear chamber, 2- spiral case, 21- centrifugal wind wheel, 22- snail
Shell outlet frame, 23- mounting plate, 3- evaporator, the upper evaporator of 31-, evaporator under 32-, 4- electric heater unit, 5- drip tray.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Embodiment one
Refering to Figure 1, it is the cross-sectional view one of air-cooled ducted air conditioner of the invention.
As shown in Figure 1, a kind of air-cooled ducted air conditioner, spiral case 2, evaporator 3 and electric heating dress including shell 1 and in shell 1
4 are set, shell 1 is rectangular parallelepiped structure, and the leading flank of shell 1 is equipped with air outlet 11, is provided with centrifugal wind wheel 21, snail in spiral case 2
Shell 2 is equipped with spiral case outlet frame 22, and the electric heater unit 4, evaporator 3 and spiral case outlet frame 22 are successively carried out far from air outlet 11
Setting, and the position of spiral case outlet frame 22, the position of evaporator 3, the position of the position of electric heater unit 4 and air outlet 11 are homogeneous
It is mutually corresponding, so that the wind energy that centrifugal wind wheel 21 is discharged is discharged from air outlet 11 after effectively passing through hot-cast socket.
It is additionally provided with partition 12 in shell 1, partition 12 divides shell 1 for front chamber 13 and rear chamber 14, is provided with air outlet
11 leading flank is parallel to each other with partition 12.Wherein spiral case 2 is arranged in rear chamber 14, and 12 top of partition is equipped with a through-hole, should
Through-hole is passed through for spiral case outlet frame 22, so that the wind energy in spiral case 2 is discharged in front chamber 13；Evaporator 3 and electric heater unit 4
Successively it is arranged in front chamber 13 far from spiral case outlet frame 22.The outside of spiral case 2 is equipped with mounting plate 23, mounting plate 23 and partition 12
It is fixed to each other and is tightly connected, for fixing the position of spiral case 2, and prevent front chamber 13 and rear chamber 14 from mutually altering wind.
The bottom of front chamber 13 is additionally provided with drip tray 5, which is installed on the lower section of evaporator 3, and 5 cloth of drip tray
The bottom of full entire front chamber 13, to avoid air-cooled ducted air conditioner leak on the condensed water homomergic flow to drip tray 5 on evaporator 3.It should
Drip tray 5 has been equipped with the inclined-plane of wind-guiding effect, and drip tray 5 is in ship type structure, i.e., close to one end of spiral case outlet frame 22 and leans on
One end of nearly air outlet 11 is equipped with acclivitous inclined-plane, and the bottom of air outlet 11 is located next to close to one end of air outlet 11
Side is arranged next to partition 12 close to one end of spiral case outlet frame 222, on the one hand guarantees that condensed water both falls within drip tray 5, another
Aspect guarantees that air outlet 11 is smoothly discharged in the wind energy in front chamber 13, reduces the loss of 13 inside wind-force of front chamber, improves out
Wind efficiency.
Wherein, air-cooled ducted air conditioner is horizontally mounted, and the section of spiral case outlet frame 22 is in bell shape, to increase spiral case outlet frame 22
Air-out area, and tilt down outlet air, when spiral case 2 is fixedly mounted in shell 1, each position of spiral case outlet frame 22 and horizontal
There is angle between direction, wherein the smallest angle of angle is the first established angle, and the value of the first established angle is a, a between 10 °~
Between 15 °, the value of the first established angle a influences the air outlet angle of air-cooled ducted air conditioner, can guarantee air-cooled ducted air conditioner when a is located in the angular range
Blowing downwards, user can experience wind sense, especially under heating state when, wind sense experience effect is more excellent；Air outlet 11 is located at
The middle part of leading flank, electric heater unit 4 is arranged close in the middle and lower part of air outlet 11, if a is excessive, what spiral case outlet frame 22 was discharged
Wind largely can directly blow to the direction of drip tray 5, and wind flows to air outlet 11 again after drip tray 5, this can then weaken significantly out
The air output in air port 11, if a is too small, the wind that spiral case outlet frame 22 is discharged can largely avoid electric heater unit 4 and be expelled directly out
Air outlet 11, this then can be reduced and be influenced the heat transfer effect of heating device 4 due to the air quantity by heating device 4.Air outlet 11
Air output size determined by the draught area and air passage rates of air outlet 11, therefore make 22 outlet air of spiral case outlet frame as far as possible
Range face air outlet 11；But when the thermal coefficient of electric heater unit 4 is constant, heat-conducting area and the velocity of liquid assets for flowing through air
Determine the heat exchange efficiency of electric heater unit 4, therefore what is be discharged in guaranteeing spiral case outlet frame 22 distinguished and admirable flows to after evaporator 3
Under air passage rates major premise as far as possible when on electric heater unit 4, electric heater unit 4 is enabled to be located at 22 row of spiral case outlet frame
It in the range of outlet air, to guarantee heat-conducting area, therefore, is derived by simulation calculus, taking a is 12 °, when the first established angle a is pressed
When this value, so that the wind sense experience sense of user reaches best.
Air-cooled ducted air conditioner of the present invention increases the design to the setting angle of spiral case outlet frame 22, improves noise problem,
Guarantee the downward outlet air of air-cooled ducted air conditioner, facilitates the comfort for promoting user, also further improve the exchange capability of heat of air-cooled ducted air conditioner, reach
Energy-efficient purpose.
Embodiment two
A kind of air-cooled ducted air conditioner as described in embodiment one, the present embodiment is different from place and is, as shown in Figure 1, evaporator 3
Be D with the nearest horizontal distance of partition 12, the horizontal width of front chamber 13 is B, the value of ratio D/B between 0.35~0.45 it
Between, when the value of ratio D/B is too big, then distance of the evaporator 3 apart from spiral case 12 is bigger, so that the wind that spiral case outlet frame 22 is discharged exists
The activity space of 3 rear side of evaporator is larger, be easy to cause cavity to echo, when the value of ratio D/B is too small, due to 3 distance of evaporator
Spiral case outlet frame 22 is relatively close, so that wind residence time shortening on evaporator 3 that spiral case outlet frame 22 is discharged, be easy to cause and change
Thermal effect is poor, and will appear sharp " secondary " abnormal sound and blow fin sound, and level of noise is caused to increase.Therefore, pass through simulation calculus
It derives, taking the value of ratio D/B is 0.42, when ratio D/B presses this value, while realizing the reduction of level of noise and ensure that
The heat transfer effect of air-cooled ducted air conditioner.
Embodiment three
A kind of air-cooled ducted air conditioner as described in embodiment one, the present embodiment is different from place and is, as shown in Figure 1, evaporator 3
For V-type evaporator comprising upper evaporator 31 and lower evaporator 32, upper evaporator 31 are connected to lower evaporation in an angular fashion
One end of device 32 substantially reduces the length of shell 1 to reduce the requirement to 1 length of shell.Upper evaporator 31 and lower evaporator
32 junction is equipped with hot melt adhesive, plays sealing resistance wind action.
The V-type evaporator is asymmetric V evaporator, i.e., the length of upper evaporator 31 and the length of lower evaporator 32 are different
Sample, i.e., upper evaporator 31 are formed by stacking by identical first fin of multiple shapes, and lower evaporator 32 is by multiple shapes identical the
Two fins are formed by stacking, and the length of first fin is not identical as the length of the second fin, in the present embodiment, on upper evaporator 31
The 6N heat exchanger tube equipped with equidistant placement, lower evaporator 32 are equipped with 8N heat exchanger tube of equidistant placement, and N represents the row of evaporator
Number；Corresponding, upper evaporator 31 is equipped with 12 mounting holes, and lower evaporator 32 is equipped with 16 mounting holes, and heat exchanger tube is U-shaped copper
Pipe, each heat exchanger tube are mounted in two mounting holes.
Air-cooled ducted air conditioner of the present invention is selected asymmetric V evaporator, is greatly improved in the case where shell has limit for height
The heat transfer effect of air-cooled ducted air conditioner.
Example IV
It please refers to shown in Fig. 2, is the cross-sectional view two of air-cooled ducted air conditioner of the invention.
A kind of air-cooled ducted air conditioner as described in embodiment three, the present embodiment is different from place and is, as shown in Fig. 2, upper evaporation
Device 31 is equipped with 8N heat exchanger tube of equidistant placement, and lower evaporator 32 is equipped with 6N heat exchanger tube of equidistant placement, and N represents evaporation
The number of rows of device；Corresponding, upper evaporator 31 is equipped with 16 mounting holes, and lower evaporator 32 is equipped with 12 mounting holes, heat exchanger tube
For U-shaped copper pipe, each heat exchanger tube is mounted in two mounting holes.Evaporator uses the design of unsymmetric structure, so that evaporator
When being limited by shell dimension, compared to the evaporator of symmetrical structure, the heat transfer effect of air-cooled ducted air conditioner can be preferably improved.
Embodiment five
A kind of air-cooled ducted air conditioner as described in example IV, the present embodiment is different from place and is, as shown in Figure 1, upper evaporation
Angle between device 31 and lower evaporator 32 is the second established angle, and the value of the second established angle is b, and b is between 65 °~75 °, upper steaming
Hair device 31 and the angle of 1 horizontal direction of shell are third established angle, and the value of third established angle is c, and c is between 25 °~45 °, b
Air-cooled ducted air conditioner heat exchange property and overall noise are influenced with the angle value of c；When b is too small so that spiral case outlet frame 22 be discharged wind compared with
That concentrates beats on evaporator 3, has be easy to cause and has blown fin sound, when b is excessive, is then on the one hand limited by 1 height dimension of shell,
On the other hand guaranteeing the heat exchange area of evaporator 3, big as far as possible (heat exchange area is related with the overall length of evaporator 3, i.e., will steaming
Hair device 3 is designed to V-type shape), therefore b should not be too large；When c is smaller, the wind that will lead to the discharge of spiral case outlet frame 22 gets to steaming
The area sent out on device 3 reduces, and causes heat transfer effect poorer, when c is excessive, due to being limited and nothing by the height dimension of evaporator 3
Method accommodates V-type evaporator.Therefore, it is derived by simulation calculus, taking b is 70 °, and c is 27 °, when b and c takes this value, Ji Nengbao
Card air-cooled ducted air conditioner, which does not generate, blows fin sound, reduces level of noise, and can guarantee that air-cooled ducted air conditioner has preferable heat transfer effect.
Air-cooled ducted air conditioner of the present invention has adjusted integral layout inside air-cooled ducted air conditioner, greatly reduces level of noise, promotes user
Comfort, also further improve the exchange capability of heat of air-cooled ducted air conditioner, reach energy-efficient purpose.
Embodiment six
A kind of air-cooled ducted air conditioner as described in embodiment five, the present embodiment are different from place and are, a is 11 °, and b is 70 °, and c is
25 °, the value of ratio D/B is 0.38.
Embodiment seven
A kind of air-cooled ducted air conditioner as described in embodiment five, the present embodiment are different from place and are, a is 14 °, and b is 66 °, and c is
27 °, the value of ratio D/B is 0.44.
Embodiment eight
A kind of air-cooled ducted air conditioner as described in embodiment five, the present embodiment are different from place and are, a is 12 °, and b is 72 °, and c is
30 °, the value of ratio D/B is 0.36.
Embodiment nine
A kind of air-cooled ducted air conditioner as described in embodiment five, the present embodiment are different from place and are, a is 13 °, and b is 68 °, and c is
28 °, the value of ratio D/B is 0.37.
Embodiment ten
A kind of air-cooled ducted air conditioner as described in embodiment five, the present embodiment are different from place and are, a is 15 °, and b is 70 °, and c is
43 °, the value of ratio D/B is 0.41.
Embodiment 11
A kind of air-cooled ducted air conditioner as described in embodiment five, the present embodiment are different from place and are, a is 10 °, and b is 74 °, and c is
29 °, the value of ratio D/B is 0.40.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of air-cooled ducted air conditioner, which is characterized in that including shell (1) and the spiral case (2), the evaporator that are set in the shell (1)
(3) and drip tray (5), the spiral case (2) are equipped with spiral case outlet frame (22), and the drip tray (5) is arranged in the evaporator
(3) lower section has angle between each position of the spiral case outlet frame (22) and horizontal direction, and wherein the smallest angle of angle is
The value of first established angle, first established angle is a, and a is between 10 °~15 °.
2. air-cooled ducted air conditioner according to claim 1, which is characterized in that a is 12 °.
3. air-cooled ducted air conditioner according to claim 1, which is characterized in that the evaporator (3) is asymmetric V evaporator,
Including upper evaporator (31) and lower evaporator (32).
4. air-cooled ducted air conditioner according to claim 3, which is characterized in that the upper evaporator (31) and the lower evaporator (32)
Between angle be the second established angle, the value of second established angle is b, and the b is between 65 °~75 °.
5. air-cooled ducted air conditioner according to claim 4, which is characterized in that the b is 70 °.
6. air-cooled ducted air conditioner according to claim 3, which is characterized in that the upper evaporator (31) and the shell (1) are horizontal
The angle in direction is third established angle, and the value of the third established angle is c, and the c is between 25 °~45 °.
7. air-cooled ducted air conditioner according to claim 6, which is characterized in that the c is 27 °.
8. air-cooled ducted air conditioner according to claim 3, which is characterized in that the upper evaporator (31) and the lower evaporator (32)
Length is different.
9. air-cooled ducted air conditioner described in -8 according to claim 1, which is characterized in that be equipped with partition (12) in the shell (1), it is described every
Shell (1) is divided into front chamber (13) and rear chamber (14), the evaporator (3) and the partition (12) nearest water by plate (12)
Flat distance is D, and the horizontal width of the front chamber (13) is B, and the value of ratio D/B is between 0.35~0.45.
10. air-cooled ducted air conditioner according to claim 9, which is characterized in that the value of the ratio D/B is 0.42.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810850294.5A CN109237625A (en) | 2018-07-28 | 2018-07-28 | A kind of air-cooled ducted air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810850294.5A CN109237625A (en) | 2018-07-28 | 2018-07-28 | A kind of air-cooled ducted air conditioner |
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| CN109237625A true CN109237625A (en) | 2019-01-18 |
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| CN201810850294.5A Pending CN109237625A (en) | 2018-07-28 | 2018-07-28 | A kind of air-cooled ducted air conditioner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109793628A (en) * | 2019-03-18 | 2019-05-24 | 宁波氧誉健康科技有限公司 | A kind of oxygen cabin air-conditioning system |
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| CN109793628A (en) * | 2019-03-18 | 2019-05-24 | 宁波氧誉健康科技有限公司 | A kind of oxygen cabin air-conditioning system |
| US20220214051A1 (en) * | 2019-10-30 | 2022-07-07 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner indoor unit and air conditioner |
| US11808464B2 (en) * | 2019-10-30 | 2023-11-07 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner indoor unit and air conditioner |
| CN113757809A (en) * | 2020-06-01 | 2021-12-07 | 广东美的暖通设备有限公司 | Air duct type air conditioner |
| CN113757807A (en) * | 2020-06-01 | 2021-12-07 | 广东美的暖通设备有限公司 | Air duct type air conditioner |
| CN113757809B (en) * | 2020-06-01 | 2023-03-03 | 广东美的暖通设备有限公司 | Air duct type air conditioner |
| CN113997754A (en) * | 2021-11-29 | 2022-02-01 | 美的集团武汉暖通设备有限公司 | Vehicle-mounted air conditioner |
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