CN116147063A - Air duct machine - Google Patents

Air duct machine Download PDF

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Publication number
CN116147063A
CN116147063A CN202111381037.XA CN202111381037A CN116147063A CN 116147063 A CN116147063 A CN 116147063A CN 202111381037 A CN202111381037 A CN 202111381037A CN 116147063 A CN116147063 A CN 116147063A
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CN
China
Prior art keywords
air
fan
air duct
less
shell
Prior art date
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Pending
Application number
CN202111381037.XA
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Chinese (zh)
Inventor
池晓龙
张一帆
丁绍军
张碧瑶
夏凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202111381037.XA priority Critical patent/CN116147063A/en
Publication of CN116147063A publication Critical patent/CN116147063A/en
Pending legal-status Critical Current

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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
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • 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
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
    • 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
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • 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
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the 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
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The air duct machine provided by the invention comprises: the air duct is formed in the shell; the fan is obliquely arranged in the air duct; the water pan is arranged in the shell, and the minimum distance h1 between the fan and the water pan is in the range of 90 mm-100 mm and h1 is not more than 90 mm. According to the air duct machine provided by the invention, the distance between the fan and the water receiving disc is limited, so that the influence of the water receiving disc on air flow flowing through the water receiving disc in the prior art is overcome, the influence of the water receiving disc on the air inlet and outlet of the fan is avoided under the condition of reducing the volume of the air duct machine as much as possible, the fan can work normally, and the heat exchange efficiency of the air duct machine is ensured.

Description

Air duct machine
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air duct machine.
Background
The air duct machine is one of air conditioners, and in order to improve comfort, some air duct machines adopt a mode of discharging cold air upwards and discharging hot air downwards, so that waterfall refrigeration and carpet type warm air can be realized. Taking a refrigerating mode as an example, when the air pipe refrigerating operation is performed, air inlet enters from the lower air port, is cooled through the heat exchanger after being blown out by the fan, and is blown out from the side air port, so that the purpose of waterfall type refrigeration is realized. However, the existing air duct machines are used for adjusting the internal air flow of the air duct machine by adjusting the arrangement positions of the fan and the heat exchanger, and the problem that the heat exchange effect of the air duct machine is poor due to the fact that the influence of the water receiving disc on the air inlet of the fan and even the internal air flow of the air duct machine is not considered.
Disclosure of Invention
The invention discloses an air duct machine, which solves the problem of poor heat exchange effect of the air duct machine in the prior art.
According to one aspect of the present invention, there is disclosed an air duct machine comprising:
the air duct is formed in the shell;
the fan is obliquely arranged in the air duct;
the water pan is arranged in the shell, and the minimum distance h1 between the fan and the water pan is in the range of 90 mm-100 mm and h1 is not more than 90 mm.
The shell is provided with a lower air opening communicated with the air duct, the air suction opening of the fan faces the lower air opening, and the minimum distance h2 between the lowest point of the air suction opening and the water receiving disc is in a range of 20 mm-30 mm.
The overflow surface of the air suction inlet of the fan and the overflow surface of the air outlet have a first included angle alpha, and the angle range of the first included angle alpha is-2 degrees or more and is 2 degrees or less.
The shell is provided with a lower air opening communicated with the air duct, an air outlet of the fan faces the lower air opening, and the minimum distance h3 between the lowest point of the air outlet and the water receiving disc is 15 mm-25 mm.
The overflow surface of the air outlet of the fan and the overflow surface of the air outlet are provided with a second included angle beta, the range of the second included angle beta is more than or equal to-2 degrees and less than or equal to 10 degrees, and when beta is less than 0 degrees, the overflow surface of the air outlet of the fan is inclined downwards relative to the overflow surface of the air outlet.
The air duct machine further comprises a mounting plate, the fan is arranged in the shell through the mounting plate, and the water receiving disc is fixedly arranged on the mounting plate.
The air duct machine further comprises a drainage mechanism, a drainage port is formed in the shell, the drainage mechanism is arranged in the shell 3, and the inside of the water receiving disc is communicated with the drainage port through the drainage mechanism.
The drainage mechanism comprises a water pump, a water inlet of the water pump is positioned in the water receiving disc, and a water outlet of the water pump is communicated with the water outlet.
The air duct machine further comprises a heat exchanger, the heat exchanger is arranged in the shell, the heat exchanger is located between the air outlet and the fan, and the water receiving disc is arranged below the heat exchanger.
The fan is a mixed flow fan.
The shell is also provided with a side air port which is communicated with the air duct.
The fan is rotatably arranged in the shell, and the fan changes the direction through rotation;
the air pipe machine is used for exhausting air from the lower air port, and the side air port is used for exhausting air, and the air outlet of the fan faces the heat exchanger in a heating mode;
the air pipe machine is in a refrigerating mode, the lower air inlet is used for air inlet, the side air inlet is used for air outlet, and the air suction inlet of the fan faces the heat exchanger.
According to the air duct machine provided by the invention, the distance between the fan and the water receiving disc is limited, so that the influence of the water receiving disc on air flow flowing through the water receiving disc in the prior art is overcome, the influence of the water receiving disc on the air inlet and outlet of the fan is avoided under the condition of reducing the volume of the air duct machine as much as possible, the fan can work normally, and the heat exchange efficiency of the air duct machine is ensured.
Drawings
FIG. 1 is a schematic view of an air duct machine according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an air duct machine in a cooling mode according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of an air duct machine according to an embodiment of the present invention in a heating mode;
legend:
1. a housing; 13. an air duct; 2. a blower; 3. a water receiving tray; 11. a lower tuyere; 21. an air suction port; 22. an air outlet; 4. a mounting plate; 12. a side air port; 5. a heat exchanger.
Detailed Description
The invention is further illustrated, but is not limited to, the following examples.
In the prior art, a heat exchanger is required to be arranged in an air duct in the air duct machine for exchanging heat of gas, and condensed water can be generated by the heat exchanger, so that a water receiving disc can be arranged below the heat exchanger and in the air duct to receive the condensed water generated on the heat exchanger, the use effect of the air duct machine is prevented from being influenced by the dripping of the condensed water, the conventional air duct machine only considers the receiving effect of the water receiving disc on the condensed water, and the improvement of the heat exchange effect of the air duct machine is realized by aiming at a fan or aiming at the heat exchanger. However, through research of the applicant and analysis of simulation experiment data, it is found that all components in the air duct can influence the air flow in the air duct in the heat exchange process of the air duct machine, only the fan or the heat exchanger is considered to play a part of the purpose of increasing the heat exchange effect, but the ignored water receiving disc is actually an important factor influencing the air flow in the air duct, when the water receiving disc is too close to the fan, the water receiving disc can block the air suction or the air exhaust of the fan to influence the heat exchange effect of the air duct machine, so that the distance between the water receiving disc and the fan is an important parameter capable of effectively improving the heat exchange efficiency of the air duct machine.
For the above reasons, as shown in fig. 1 to 3, the present invention discloses an air duct machine, comprising: a housing 1, wherein an air duct 13 is formed in the housing 1; the fan 2 is obliquely arranged in the air duct 13; the water pan 3, water pan 3 set up in casing 1, fan 2 with minimum distance h 1's between the water pan 3 scope is 90mm and is less than or equal to h1 and is less than or equal to 100mm. The inclined arrangement of the fan 2 means that the direction of the air suction opening of the fan 2 and/or the direction of the air exhaust opening of the fan 2 has an included angle with the horizontal direction. The minimum distance h1 between the fan 2 and the water pan 3 refers to the minimum distance between the center of the fan 2 and the water pan 3.
Simulation experiments are carried out on the embodiment, the numerical value of the minimum distance h1 between the fan 2 and the water receiving disc 3 is changed, and the simulation results are as follows:
Figure BDA0003365542060000031
Figure BDA0003365542060000041
according to simulation data, when h1 is 95mm, the air quantity reaches the maximum value, and the noise reaches the minimum value; when h1 increases to 100, the air quantity starts to decrease, and the noise starts to increase; when h1 is continuously increased to 101, the air quantity attenuation is continuously increased, and the noise is obviously increased; when h1 is reduced to 90, the air quantity starts to be reduced, and the noise starts to be increased; when h1 is continuously reduced to 89, the air quantity attenuation is continuously increased, and the noise is obviously increased; it can be said that the air volume and noise deviation of the fan 2 from the water pan 3 in the range of 90mm to 100mm is small and the effect is best, and the distance h1 is greatly changed after exceeding the critical value, so that the normal operation of the air duct machine cannot be ensured.
The shell 1 is provided with a lower air opening 11 communicated with the air duct 13, an air suction opening 21 of the fan 2 faces the lower air opening 11, and the minimum distance h2 between the lowest point of the air suction opening 21 and the water receiving disc 3 is in a range of 20 mm-30 mm.
Simulation experiments are carried out on the embodiment, the numerical value of the minimum distance h2 between the lowest point of the air suction port 21 of the fan 2 and the water receiving disc 3 is changed, and the simulation results are as follows:
distance (mm) Rotating speed (rpm) Air volume (m 3/h) Noise (dB)
19 2200 515 44.8
20 2200 528 43.5
25 2200 535 43
30 2200 530 43.7
31 2200 517 44.5
According to simulation data, when h2 is 25mm, the air quantity reaches the maximum value, and the noise reaches the minimum value; when h2 increases to 30, the air quantity starts to decrease, and the noise starts to increase; when h2 is continuously increased to 31, the air quantity attenuation is continuously increased, and the noise is obviously increased; when h2 is reduced to 20, the air quantity starts to be reduced, and the noise starts to be increased; when h2 is continuously reduced to 19, the air quantity attenuation is continuously increased, and the noise is obviously increased; it can be said that the minimum distance h2 between the lowest point of the air suction port 21 of the fan 2 and the water pan 3 is in the range of 20mm to 30mm, the air quantity and noise deviation is not large and the effect is best, and the distance h2 is greatly changed after exceeding the critical value, so that the normal operation of the air duct machine cannot be ensured.
The overflow surface of the air suction inlet 21 of the fan 2 and the overflow surface of the air down inlet 11 have a first included angle alpha, and the angle range of the first included angle alpha is 88 degrees or more and is not more than 92 degrees or less.
Simulation experiments are carried out on the embodiment, the numerical value of the first included angle alpha is changed, and the simulation results are as follows:
angle of Rotating speed (rpm) Air volume (m 3/h) Noise (dB)
87 2200 510 44.2
88 2200 528 43.5
90 2200 533 43.2
92 2200 525 43.7
93 2200 508 44.8
According to simulation data, when alpha is 90 degrees, the air quantity reaches the maximum value, and the noise reaches the minimum value; when alpha is increased to 92 degrees, the air quantity starts to be reduced, and the noise starts to be increased; when alpha is continuously increased to 93 degrees, the air quantity attenuation is continuously increased, and the noise is obviously increased; when alpha is reduced to 88 degrees, the air quantity starts to be reduced, and the noise starts to be increased; when alpha is continuously reduced to 87 degrees, the air quantity attenuation is continuously increased, and the noise is obviously increased; it can be said that the air volume and noise deviation of the first included angle α within the range of 88 ° to 92 ° is not large and the effect is best, and the first included angle α is greatly changed after exceeding the critical value, so that the normal operation of the air duct machine cannot be ensured.
The shell 1 is provided with a lower air opening 11 communicated with the air duct 13, an air outlet 22 of the fan 2 faces the lower air opening 11, and the minimum distance h3 between the lowest point of the air outlet 22 and the water receiving disc 3 is 15 mm-25 mm.
In this embodiment, a simulation experiment is performed to change the value of the minimum distance h3 between the lowest point of the air outlet 22 and the water pan 3, and the simulation result is as follows:
distance (mm) Rotating speed (rpm) Air volume (m 3/h) Noise (dB)
13 2200 512 42.6
15 2200 515 41.3
20 2200 521 41
25 2200 512 41.7
26 2200 500 42.8
According to simulation data, when h3 is 20mm, the air quantity reaches the maximum value, and the noise reaches the minimum value; when h3 increases to 25, the air quantity starts to decrease, and the noise starts to increase; when h3 is continuously increased to 26, the air quantity attenuation is continuously increased, and the noise is obviously increased; when h2 is reduced to 15, the air quantity starts to be reduced, and the noise starts to be increased; when h2 is continuously reduced to 13, the air quantity attenuation is continuously increased, and the noise is obviously increased; it can also be said that the air volume and noise deviation of the minimum distance h3 between the lowest point of the air outlet 22 and the water pan 3 in the range of 20mm to 30mm is not large and the effect is best, and the distance h3 is greatly changed after exceeding the critical value, so that the normal operation of the air duct machine cannot be ensured.
The flow surface of the air outlet 22 of the fan 2 and the flow surface of the air outlet 11 have a second included angle beta, the range of the second included angle beta is-2 degrees or more and is less than or equal to 10 degrees or less, and when beta is less than 0 degrees, the flow surface of the air outlet 22 of the fan 2 is inclined downwards relative to the flow surface of the air outlet 11.
In this embodiment, a simulation experiment is performed to change the value of the second included angle β, where the value is positive with respect to the upward inclination of the flow surface of the tuyere 11, and negative with respect to the downward inclination of the flow surface of the tuyere 11, and the simulation result is as follows:
angle of Rotating speed (rpm) Air volume (m 3/h) Noise (dB)
-3 2200 500 41.8
-2 2200 513 40.8
0 2200 520 40
10 2200 510 40.3
13 2200 496 41.2
According to simulation data, when beta is 0 degree, the air quantity reaches the maximum value, and the noise reaches the minimum value; when beta is increased to 10 degrees, the air quantity starts to be reduced, and the noise starts to be increased; when beta is continuously increased to 13 degrees, the air quantity attenuation is continuously increased, and the noise is obviously increased; when beta is reduced to-2 degrees, the air quantity starts to be reduced, and the noise starts to be increased; when beta is continuously reduced to-3 degrees, the air quantity attenuation is continuously increased, and the noise is obviously increased; it can be said that the second included angle β has small deviation of air volume and noise in the range of-2 ° to 10 ° and the best effect, and the second included angle β has large change after exceeding the critical value, so that the normal operation of the air duct machine cannot be ensured.
The air duct machine further comprises a mounting plate 4, the fan 2 is arranged in the shell 1 through the mounting plate 4, and the water receiving disc 3 is fixedly arranged on the mounting plate 4. Preferably, the mounting plate 4 can separate the lower air port 11 and the side air port on the housing 1, so that the air flow entering the housing 1 can pass through the fan 2.
The air duct machine further comprises a drainage mechanism, a drainage port is formed in the shell 1, the drainage mechanism is arranged in the shell 1, and the inside of the water receiving disc 3 is communicated with the drainage port through the drainage mechanism. Preferably, the casing 1 has a lower side surface and a first side surface, the lower air opening 11 is arranged on the lower side surface, and the first side surface and the lower side surface have an included angle, and the water outlet is arranged on the first side surface, so that the influence of the water discharging mechanism on the air flow in the air pipe machine is avoided.
The water draining mechanism comprises a water pump, a water inlet of the water pump is positioned in the water receiving disc 3, and a water outlet of the water pump is communicated with the water draining outlet.
The air duct machine further comprises a heat exchanger 5, the heat exchanger 5 is arranged in the shell 1, the heat exchanger 5 is located between the air outlet 11 and the fan 2, and the water pan 3 is arranged below the heat exchanger 5. Wherein the projected area of the heat exchanger 5 on the lower side of the housing 1 is smaller than the projected area of the water pan 3 on the lower side of the housing 1.
The fan 2 is a mixed flow fan.
The shell 1 is also provided with a side air port 12, and the side air port 12 is communicated with the air duct 13.
The fan 2 is rotatably arranged in the shell 1, and the fan 2 changes the direction through rotation;
in the heating mode of the air pipe machine, the lower air port 11 is used for air outlet, the side air port 12 is used for air inlet, and the air outlet 22 of the fan 2 faces the heat exchanger 5; the air outside the shell 1 is sucked by the side air port 12 under the action of the fan 2 and is discharged out of the shell 1 through the air port 11 after being heated by the fan 2 and the heat exchanger 5 in sequence, so that the effect of rapid heating is realized;
in the cooling mode, the air pipe machine is characterized in that the lower air port 11 is used for air intake, the side air port 12 is used for air exhaust, and the air intake 21 of the fan 2 faces the heat exchanger 5. The air outside the shell 1 is sucked in by the air outlet 11 under the action of the fan 2 and is discharged out of the shell 1 by the side air outlet 12 after passing through the cooling of the heat exchanger 5 and the fan 2 in sequence, thereby realizing the effect of waterfall refrigeration.
It should be understood that the above-described embodiments of the present invention are provided by way of example only and are not intended to limit the scope of the invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. Not all embodiments are exhaustive. All obvious changes or modifications which come within the spirit of the invention are desired to be protected.

Claims (10)

1. An air duct machine, characterized in that: comprising the following steps:
the device comprises a shell (1), wherein an air duct (13) is formed in the shell (1);
the fan (2) is obliquely arranged in the air duct (13);
the water pan (3), water pan (3) set up in casing (1), fan (2) with minimum distance h 1's between water pan (3) scope is 90mm and is less than or equal to h1 and is less than or equal to 100mm.
2. The ducted air conditioner of claim 1, wherein: be provided with on casing (1) with lower wind gap (11) of wind channel (13) intercommunication, inlet scoop (21) of fan (2) are towards lower wind gap (11), just minimum distance h 2's between the minimum of inlet scoop (21) with water collector (3) scope is 20mm and is less than or equal to h2 and is less than or equal to 30mm.
3. The ducted air conditioner of claim 2, wherein: the overflow surface of the air suction opening (21) of the fan (2) and the overflow surface of the air down opening (11) have a first included angle alpha, and the angle range of the first included angle alpha is-2 degrees or more and is less than or equal to 2 degrees or less.
4. The ducted air conditioner of claim 1, wherein: be provided with on casing (1) with lower wind gap (11) of wind channel (13) intercommunication, air exit (22) of fan (2) are towards lower wind gap (11), just the range of minimum distance h3 between the minimum point of air exit (22) and water collector (3) is 15mm and is less than or equal to h3 and is less than or equal to 25mm.
5. The ducted air conditioner of claim 4, wherein: the overflow surface of the air outlet (22) of the fan (2) and the overflow surface of the air outlet (11) are provided with a second included angle beta, the range of the second included angle beta is more than or equal to-2 degrees and less than or equal to 10 degrees, and when beta is less than 0 degrees, the overflow surface of the air outlet (22) of the fan (2) is inclined downwards relative to the overflow surface of the air outlet (11).
6. The ducted air conditioner of claim 1, wherein: the air duct machine further comprises a mounting plate (4), the fan (2) is arranged in the shell (1) through the mounting plate (4), and the water receiving disc (3) is fixedly arranged on the mounting plate (4).
7. The ducted air conditioner according to any one of claims 2 to 6, characterized in that: the air duct machine further comprises a heat exchanger (5), the heat exchanger (5) is arranged in the shell (1), the heat exchanger (5) is located between the air outlet (11) and the fan (2), and the water receiving disc (3) is arranged below the heat exchanger (5).
8. The ducted air conditioner of claim 1, wherein: the fan (2) is a mixed flow fan.
9. The ducted air conditioner of claim 2, wherein: the shell (1) is also provided with a side air port (12), and the side air port (12) is communicated with the air duct (13).
10. The ducted air conditioner of claim 9, wherein: the fan (2) is rotatably arranged in the shell (1), and the fan (2) changes the direction through rotation;
the air pipe machine is in a heating mode, the air outlet (11) is used for air outlet, the side air outlet (12) is used for air inlet, and the air outlet (22) of the fan (2) faces the heat exchanger (5);
the air pipe machine is in a refrigerating mode, the air inlet of the lower air opening (11) is provided, the air outlet of the side air opening (12) is provided, and the air suction opening (21) of the fan (2) faces the heat exchanger (5).
CN202111381037.XA 2021-11-20 2021-11-20 Air duct machine Pending CN116147063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111381037.XA CN116147063A (en) 2021-11-20 2021-11-20 Air duct machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111381037.XA CN116147063A (en) 2021-11-20 2021-11-20 Air duct machine

Publications (1)

Publication Number Publication Date
CN116147063A true CN116147063A (en) 2023-05-23

Family

ID=86349320

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111381037.XA Pending CN116147063A (en) 2021-11-20 2021-11-20 Air duct machine

Country Status (1)

Country Link
CN (1) CN116147063A (en)

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