CN110979368A - Air supply device and air conditioning unit - Google Patents
Air supply device and air conditioning unit Download PDFInfo
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- CN110979368A CN110979368A CN201911303945.XA CN201911303945A CN110979368A CN 110979368 A CN110979368 A CN 110979368A CN 201911303945 A CN201911303945 A CN 201911303945A CN 110979368 A CN110979368 A CN 110979368A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 11
- 238000007664 blowing Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 description 9
- 238000005192 partition Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0018—Air-conditioning means, i.e. combining at least two of the following ways of treating or supplying air, namely heating, cooling or ventilating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Duct Arrangements (AREA)
Abstract
The application provides an air supply device and an air conditioning unit. The air supply device comprises a main air duct and a plurality of horizontal air ducts connected with the main air duct, wherein an air outlet is formed at the tail end of each horizontal air duct, and an air inlet is formed in the vertical direction of the main air duct. The axial flow fan is arranged on the air inlet and used for introducing airflow into the air inlet. The flow guide disc is arranged on the inner wall of the main air duct, which is opposite to the air inlet, and the flow guide disc is used for uniformly dispersing the air flow introduced by the air inlet into each horizontal air duct. By applying the technical scheme of the invention, airflow is introduced into the air inlets through the axial flow fan, the airflow enters the main air channel and blows against the flow guide disc, the flow guide disc uniformly disperses the airflow introduced from the air inlets into each horizontal air channel, so that uniform air supply for each horizontal air channel is realized, and then the airflow can be supplied out from the air outlets at the tail ends of each horizontal air channel, and uniform air supply for each air outlet is realized.
Description
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to an air supply device and an air conditioning unit.
Background
The conventional air conditioner for the railway vehicle usually adopts an air duct structure of the air conditioner for the railway vehicle as disclosed in patent No. CN204095824U to perform an air supply system. The structure can realize uniform air supply to a certain degree. However, a soft air duct and a complex main air duct are required to be arranged behind an air supply outlet of the air conditioner, so that the cost is high, the flow is long, the resistance is large, and the air supply pressure head is high.
In addition, the air supply outlet of the air conditioner main unit is connected with the main air duct of the vehicle, the main air duct is connected with the branch air duct, and the branch air duct supplies air to the passenger room through a strip seam or an orifice and the like. The air supply system has the defects of uneven air supply, complex air duct, large flow resistance and the like in different degrees.
Disclosure of Invention
The embodiment of the invention provides an air supply device and an air conditioning unit, and aims to solve the technical problem of uneven air supply of an air supply structure in the prior art.
An embodiment of the present application provides an air supply device, including: the air conditioner comprises a main air duct and a plurality of horizontal air ducts connected with the main air duct, wherein an air outlet is formed at the tail end of each horizontal air duct, and an air inlet is formed in the vertical direction of the main air duct; the axial flow fan is arranged on the air inlet and used for introducing airflow into the air inlet; and the flow guide disc is arranged on the inner wall of the main air duct, which is opposite to the air inlet, and is used for uniformly dispersing the air flow introduced by the air inlet into each horizontal air duct.
In one embodiment, the deflector is formed with a conical air guide body protruding toward the air inlet.
In one embodiment, a plurality of air outlets are formed on the horizontal air duct.
In one embodiment, a first baffle assembly is disposed within the horizontal air duct for distributing the airflow entering the horizontal air duct to each of the outlets.
In one embodiment, a second guide plate assembly is further arranged in the horizontal air duct, the second guide plate assembly and the first guide plate assembly are arranged at intervals, and the second guide plate assembly is used for being matched with the first guide plate assembly to achieve uniform air outlet of each air outlet.
In one embodiment, the plurality of horizontal air ducts includes a left air duct and a right air duct, which are connected to left and right sides of the main air duct, respectively.
In one embodiment, the left air duct and the right air duct are perpendicular to the main air duct, respectively.
In one embodiment, the upper end and the lower end of the left air duct form two air outlets respectively, and the upper end and the lower end of the right air duct form two air outlets respectively.
In one embodiment, the first guide plate assembly comprises a first curved guide plate and a second curved guide plate, the first guide plate and the second guide plate are connected in a herringbone manner and are respectively arranged in the left air duct and the right air duct towards the main air duct, and the first guide plate and the second guide plate are used for distributing air flow to air outlets at the upper end and the lower end of the left air duct/the right air duct.
In one embodiment, the first baffle assembly further comprises a wind adjustment baffle rotatably disposed adjacent to the first baffle and the second baffle for adjusting the amount of wind passing through the first baffle and the second baffle.
In one embodiment, the second baffle assembly includes a curved third baffle and a curved fourth baffle, the third baffle and the fourth baffle are arranged in a 'er' shape and are respectively spaced from the first baffle and the second baffle, the third baffle and the first baffle cooperate to distribute airflow uniformly to the air outlet at the upper end of the left air duct/right air duct, and the fourth baffle and the second baffle cooperate to distribute airflow uniformly to the air outlet at the lower end of the left air duct/right air duct.
In one embodiment, the inner wall of the main air duct and/or the inner wall of the horizontal air duct are provided with sponge.
In one embodiment, the air supply device further comprises a chassis, and the main air duct and the horizontal air duct are mounted on the chassis.
In one embodiment, the air inlet is provided with a flow guide ring, and the axial flow fan is arranged on the flow guide ring.
The application also provides an air conditioning unit, which comprises the air supply device.
In the above embodiment, the axial flow fan introduces the air flow into the air inlet, the air flow enters the main air duct and blows against the flow guide disc, and the flow guide disc uniformly disperses the air flow introduced from the air inlet into each horizontal air duct, so that uniform air supply to each horizontal air duct is realized, and then the air flow can be supplied out from the air outlet at the tail end of each horizontal air duct, and uniform air supply of each air outlet is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic longitudinal sectional view of an embodiment of an air blowing device according to the present invention;
FIG. 2 is a schematic cross-sectional view of an embodiment of an air supply apparatus according to the present invention;
FIG. 3 is a schematic view of a baffle of the blower of FIG. 2;
fig. 4 is a schematic structural view of a first baffle assembly and a second baffle assembly of a baffle of the air supply apparatus of fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In order to solve the technical problem of uneven air supply in an air supply structure in the prior art, the invention provides an air supply device, and as shown in fig. 1 and 2, the embodiment of the air supply device comprises a main air duct 10 and a plurality of horizontal air ducts connected with the main air duct 10, wherein an air outlet 21 is formed at the tail end of each horizontal air duct, and an air inlet 11 is formed in the vertical direction of the main air duct 10. The axial flow fan 30 is disposed on the air inlet 11 and is used for introducing air flow into the air inlet 11. The flow guiding disc 40 is disposed on an inner wall of the main air duct 10 opposite to the air inlet 11, and the flow guiding disc 40 is used for uniformly dispersing the air flow introduced by the air inlet 11 into each horizontal air duct.
By applying the technical scheme of the invention, airflow is introduced into the air inlet 11 through the axial flow fan 30, the airflow enters the main air duct 10 and blows against the flow guide disc 40, the flow guide disc 40 uniformly disperses the airflow introduced by the air inlet 11 into each horizontal air duct, so that uniform air supply for each horizontal air duct is realized, and then the airflow can be supplied out from the air outlet 21 at the tail end of each horizontal air duct, so that uniform air supply for each air outlet 21 is realized.
Optionally, as shown in fig. 1, a flow guiding ring 111 is disposed on the air inlet 11, and the axial flow fan 30 is mounted on the flow guiding ring 111.
As shown in fig. 3, as a preferred embodiment, a conical air guide body 41 protruding toward the air inlet 11 is formed on the baffle 40. The air flow velocity blown to the conical air guide body 41 is set to be Vi, and the Vi generates X-direction and Y-direction component velocities under the flow guiding action of the conical air guide body 41, namely Vix, Viy and Vix are perpendicular to the wall surface of the air duct to form static pressure. The flow guide disc is adopted, so that the air supply of the axial flow fan is divided for the first time, partial dynamic pressure is converted into static pressure, the generation of vortex is inhibited, the flow resistance loss is reduced, the generation of vortex is inhibited, the noise is reduced, the pressure loss is reduced, and the energy is saved. The air flow is uniformly distributed along each horizontal air duct. Under the action of on-way resistance, the air flow speed is reduced, and the static pressure is gradually increased
More preferably, the cross-sectional area of the air inlet 11 may be smaller than that of the main duct 10, so that the air flow speed decreases and the static pressure increases.
As shown in fig. 2, in the technical solution of this embodiment, a plurality of air outlets 21 are formed on the horizontal air duct to realize multi-directional air outlet. Optionally, the air outlet 21 is a rectangular air outlet.
More preferably, a first baffle assembly 50 is disposed in the horizontal air duct, and the first baffle assembly 50 is configured to distribute the airflow entering the horizontal air duct to each air outlet 21, so as to achieve uniform air outlet at each air outlet 21. More preferably, as shown in fig. 2 and 4, a second baffle assembly 60 is further disposed in the horizontal air duct, the second baffle assembly 60 is spaced from the first baffle assembly 50, and the second baffle assembly 60 is used for matching with the first baffle assembly 50 to achieve uniform air outlet of each air outlet 21. By adopting the first guide plate assembly 50 and the second guide plate assembly 60 to be matched, secondary flow distribution can be performed, laminar flow is strengthened, vortex is inhibited, dynamic pressure is converted into static pressure, low-speed uniform air supply is realized, flow resistance loss is reduced, and noise is reduced.
Specifically, as shown in fig. 2, in the technical solution of the present embodiment, the plurality of horizontal air ducts includes a left air duct 20a and a right air duct 20b, and the left air duct 20a and the right air duct 20b are respectively connected to the left and right sides of the main air duct 10. Optionally, two air outlets 21 are respectively formed at the upper end and the lower end of the left air duct 20a, and two air outlets 21 are also respectively formed at the upper end and the lower end of the right air duct 20 b. Thus, the built-in air duct form of one air inlet 11 and four air outlets 21 is adopted, which is beneficial to uniform air supply, reduces the temperature gradient of the passenger room and improves the comfort.
Preferably, the inner wall of the main air duct 10 and/or the inner wall of the horizontal air duct are provided with sponges 70, and the sponges have the functions of heat preservation, sealing, noise reduction and shock absorption.
Optionally, in the technical solution of this embodiment, the left air duct 20a and the right air duct 20b are respectively perpendicular to the main air duct 10. Thereby let the wind channel be I shape central symmetry and distribute, make flow length equal, do benefit to even air supply. Optionally, the duct cross-sections of the main duct 10, the left duct 20a, and the right duct 20b are rectangular, and the rectangular area is large, so that a static pressure box effect is formed, and uniform air supply is realized.
Optionally, the air duct formed by the main air duct 10, the left air duct 20a, and the right air duct 20b may adopt a cover plate type air duct structure, that is, a top plate forming the air duct may be detachable, so as to facilitate maintenance of the fan blades and the air duct. Optionally, the top plate of the main duct 10, the top plate of the left duct 20a, and the top plate of the right duct 20b are all arranged relatively independently, so that independent maintenance of each block is facilitated. Optionally, each top plate may be fixed to the i-shaped air duct plate by a bolt group. Optionally, the i-shaped air duct plate can be formed by welding a left partition plate, a left middle partition plate, 2 middle partition plates, a right middle partition plate and a right partition plate to form an air duct framework. The I-shaped air duct plate is welded on the base plate assembly, so that an air duct built in the air conditioning unit becomes possible. Because the built-in air duct can realize low-speed uniform air supply, the air can be directly supplied to the static pressure box of the passenger room. And a complex main air duct system is not needed behind the air supply outlet of the unit, so that the cost is greatly reduced, the flow loss is reduced, the air is supplied by a high-pressure head fan, and the energy is saved.
As shown in fig. 2 and 4, the first baffle assembly 50 includes a curved first baffle 51 and a curved second baffle 52, the first baffle 51 and the second baffle 52 are connected in a shape like a Chinese character 'ren' and are respectively disposed in the left air duct 20a and the right air duct 20b toward the main air duct 10, and the first baffle 51 and the second baffle 52 are used for distributing air flow to the air outlets 21 at the upper and lower ends of the left air duct 20 a/the right air duct 20 b.
As shown in fig. 4, in the technical solution of the present embodiment, the first baffle assembly 50 further includes an air adjusting baffle 53, the air adjusting baffle 53 is rotatably disposed at an adjacent position connected to the first baffle 51 and the second baffle 52, and the air adjusting baffle 53 is used for adjusting air volume passing through the first baffle 51 and the second baffle 52, so as to improve air supply uniformity. When the air quantity adjusting device is used, the air quantity passing through the first guide plate 51 and the second guide plate 52 can be adjusted through the air quantity adjusting guide plate 53, and after the air quantity is uniform, the air quantity adjusting guide plate 53 is fixed. Optionally, the air adjusting guide plate 53 may be connected by two bolts, and may move around 1 bolt as an axis along another 1 bolt in a fan shape to finely adjust the air volume of each air outlet 21, and fasten 2 bolts after the air supply of each air outlet 21 is uniform. Specifically, when the distance of the flow channel where one air outlet 21 is located is long and the flow resistance is large, the air adjusting guide plate 53 adjusts more air volume to the air outlet 21.
As shown in fig. 2 and 4, in the technical solution of the present embodiment, the second baffle assembly 60 includes a curved third baffle 61 and a curved fourth baffle 62, the third baffle 61 and the fourth baffle 62 are arranged in a "er" shape and are spaced apart from the first baffle 51 and the second baffle 52, the third baffle 61 and the first baffle 51 cooperate to distribute airflow uniformly to the air outlets 21 at the upper ends of the left air duct 20 a/the right air duct 20b, and the fourth baffle 62 and the second baffle 52 cooperate to distribute airflow uniformly to the air outlets 21 at the lower ends of the left air duct 20 a/the right air duct 20 b. Like this, when using, through the cooperation of third guide plate 61 and first guide plate 51 and the cooperation of fourth guide plate 62 and second guide plate 52, can carry out the reposition of redundant personnel to the air current for the second time, strengthen the laminar flow, restrain the vortex, let the dynamic pressure convert static pressure, realize low-speed even air supply, reduce the flow resistance loss, reduce the noise.
Optionally, the first baffle 51, the second baffle 52, the third baffle 61, and the fourth baffle 62 are welded in the bottom plate of the air duct. The first guide plate 51, the second guide plate 52, the third guide plate 61 and the fourth guide plate 62 play roles of flow dividing, flow guiding, flow converging and flow adjusting together. The arc guide plate can guide airflow to move in laminar flow, inhibit eddy flow, reduce noise, reduce pressure loss and save energy. Because the first guide plate 51, the second guide plate 52, the third guide plate 61 and the fourth guide plate 62 are all arc-shaped guide plates, under the guide effect of the arc-shaped guide plates, airflow flows through channels between the guide plates in a laminar flow state, so that the generation of vortex is inhibited, the flow resistance is reduced, and the energy conservation is realized. Through the effect of above-mentioned guide plate, can let the air current of each air outlet be 2 air currents and converge the outflow with laminar flow state.
In the technical scheme of the invention, because the left air duct 20a and the right air duct 20b are symmetrically distributed, the flow loss is the same, and the flow is equal. Although the flow of the upper and lower outlets 21 of the left air duct 20a is different, the flow rates of the air flows divided by the first baffle assembly 50 and the second baffle assembly 60 are adjusted to be equal. Similarly, the flow lengths of the upper air outlet and the lower air outlet of the right air duct 20b are different, and the flow rates are adjusted to be consistent under the flow splitting of the first guide plate assembly 50 and the second guide plate assembly 60. Through the combined action of above-mentioned structure, the air-out flow that finally realizes four air outlets 21 equals like this, and the wind speed is suitable, realizes evenly supplying air simultaneously, ensures the travelling comfort.
As shown in fig. 1 and fig. 2, in the technical solution of the present embodiment, optionally, the air supply device further includes a chassis 80, and the main air duct 10 and the horizontal air duct are mounted on the chassis 80, so as to implement integral mounting of the air ducts.
It should be noted that if the baffle 40 is replaced by a porous partition, the air supply resistance and noise will be large.
The invention also provides an air conditioning unit which comprises the air supply device, and the air supply device can realize the homogenization of air supply refrigeration/heating of the air conditioning unit and improve the user experience.
According to the technical scheme, the problem of uneven air supply, the problems of complex air duct and high cost are solved, the problems of large flow resistance, high air supply pressure head and energy saving are solved, and the problem of high noise is also solved. The air conditioner has the advantages that the air can be uniformly supplied without an external complex air duct, and a complex air duct system is not needed behind an air supply outlet of the air conditioner main unit, so that the cost is greatly reduced. In addition, the air conditioner air supply outlet directly enters the passenger room static pressure box for air supply, air duct flow loss is avoided, a high-pressure head fan is not needed for air supply, energy conservation is realized, and 2-3dB of noise reduction can be realized. In addition, the air duct is relatively convenient to maintain.
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 to the embodiment of the present invention 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 (15)
1. An air supply device, comprising:
the air conditioner comprises a main air duct (10) and a plurality of horizontal air ducts connected with the main air duct (10), wherein an air outlet (21) is formed at the tail end of each horizontal air duct, and an air inlet (11) is formed in the vertical direction of the main air duct (10);
the axial flow fan (30) is arranged on the air inlet (11) and is used for introducing airflow into the air inlet (11);
the flow guide disc (40) is arranged on the inner wall, opposite to the air inlet (11), in the main air duct (10), and the flow guide disc (40) is used for uniformly dispersing air flow introduced by the air inlet (11) into each horizontal air duct.
2. The air supply device of claim 1, wherein the deflector (40) is formed with a conical air guide body (41) protruding toward the air inlet (11).
3. The blowing device according to claim 1, wherein a plurality of the air outlets (21) are formed in the horizontal duct.
4. The air supply device according to claim 3, wherein a first baffle assembly (50) is arranged in the horizontal air duct, and the first baffle assembly (50) is used for distributing the air flow entering the horizontal air duct to each air outlet (21).
5. The air supply device according to claim 4, wherein a second baffle assembly (60) is further disposed in the horizontal air duct, the second baffle assembly (60) is spaced from the first baffle assembly (50), and the second baffle assembly (60) is used for matching with the first baffle assembly (50) to achieve uniform air outlet of each air outlet (21).
6. The air supply device according to claim 5, wherein the plurality of horizontal air ducts include a left air duct (20a) and a right air duct (20b), and the left air duct (20a) and the right air duct (20b) are connected to left and right sides of the main air duct (10), respectively.
7. The air supply device according to claim 6, wherein the left air duct (20a) and the right air duct (20b) are perpendicular to the main air duct (10), respectively.
8. The blowing device according to claim 7, wherein two air outlets (21) are formed at upper and lower ends of the left air duct (20a), and two air outlets (21) are formed at upper and lower ends of the right air duct (20 b).
9. The air supply device according to claim 8, wherein the first baffle assembly (50) comprises a first curved baffle (51) and a second curved baffle (52), the first baffle (51) and the second baffle (52) are connected in a herringbone manner and are respectively arranged in the left air duct (20a) and the right air duct (20b) towards the main air duct (10), and the first baffle (51) and the second baffle (52) are used for distributing air flow to the air outlets (21) at the upper end and the lower end of the left air duct (20 a)/the right air duct (20 b).
10. The air supply device according to claim 9, wherein the first baffle assembly (50) further comprises an air adjusting baffle (53), the air adjusting baffle (53) is rotatably disposed at an adjacent position to the first baffle (51) and the second baffle (52), and the air adjusting baffle (53) is used for adjusting the amount of air passing through the first baffle (51) and the second baffle (52).
11. An air supply arrangement according to claim 9, characterised in that the second baffle assembly (60) comprises a curved third baffle (61) and a curved fourth baffle (62), the third guide plate (61) and the fourth guide plate (62) are arranged in a 'er' shape and are respectively separated from the first guide plate (51) and the second guide plate (52), the third guide plate (61) and the first guide plate (51) are matched to uniformly distribute airflow to the air outlet (21) at the upper end of the left air duct (20 a)/the right air duct (20b), the fourth baffle (62) and the second baffle (52) cooperate to distribute the airflow uniformly to the air outlet (21) at the lower end of the left air duct (20 a)/the right air duct (20 b).
12. The air supply device according to claim 1, characterized in that a sponge (70) is arranged on the inner wall of the main air duct (10) and/or the inner wall of the horizontal air duct.
13. The air supply device according to claim 1, further comprising a chassis (80), wherein the main duct (10) and the horizontal duct are mounted on the chassis (80).
14. The air supply device according to claim 1, wherein a flow guide ring (111) is arranged on the air inlet (11), and the axial flow fan (30) is mounted on the flow guide ring (111).
15. An air conditioning unit comprising an air supply arrangement, wherein the air supply arrangement is as claimed in any one of claims 1 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911303945.XA CN110979368A (en) | 2019-12-17 | 2019-12-17 | Air supply device and air conditioning unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911303945.XA CN110979368A (en) | 2019-12-17 | 2019-12-17 | Air supply device and air conditioning unit |
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| CN110979368A true CN110979368A (en) | 2020-04-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112788930A (en) * | 2021-02-04 | 2021-05-11 | 广东海悟科技有限公司 | Air supply equipment, refrigerating system and communication cabinet system |
| CN113232686A (en) * | 2021-06-08 | 2021-08-10 | 中车（天津）轨道交通设备有限公司 | Dust collector with current equalizer |
| CN113310158A (en) * | 2021-06-25 | 2021-08-27 | 珠海格力电器股份有限公司 | New fan |
| CN113397801A (en) * | 2021-05-24 | 2021-09-17 | 成都市第五人民医院 | Cooling device for head of intensive care |
| CN115512677A (en) * | 2022-08-16 | 2022-12-23 | 广州精益运输制冷设备有限公司 | Noise-reduction air distribution device for rail train air conditioner |
| CN113232686B (en) * | 2021-06-08 | 2024-10-22 | 天津中鑫轨道交通设备有限公司 | Dust collector with flow equalizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112788930A (en) * | 2021-02-04 | 2021-05-11 | 广东海悟科技有限公司 | Air supply equipment, refrigerating system and communication cabinet system |
| CN112788930B (en) * | 2021-02-04 | 2023-05-12 | 广东海悟科技有限公司 | Air supply equipment, refrigerating system and communication cabinet system |
| CN113397801A (en) * | 2021-05-24 | 2021-09-17 | 成都市第五人民医院 | Cooling device for head of intensive care |
| CN113232686A (en) * | 2021-06-08 | 2021-08-10 | 中车（天津）轨道交通设备有限公司 | Dust collector with current equalizer |
| CN113232686B (en) * | 2021-06-08 | 2024-10-22 | 天津中鑫轨道交通设备有限公司 | Dust collector with flow equalizer |
| CN113310158A (en) * | 2021-06-25 | 2021-08-27 | 珠海格力电器股份有限公司 | New fan |
| CN115512677A (en) * | 2022-08-16 | 2022-12-23 | 广州精益运输制冷设备有限公司 | Noise-reduction air distribution device for rail train air conditioner |
| CN115512677B (en) * | 2022-08-16 | 2023-10-10 | 广州精益运输制冷设备有限公司 | Noise-reducing and wind-distributing device for air conditioner of rail train |
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