CN112377435A - Ethanol normal atmospheric temperature drying system - Google Patents

Ethanol normal atmospheric temperature drying system Download PDF

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Publication number
CN112377435A
CN112377435A CN202011182002.9A CN202011182002A CN112377435A CN 112377435 A CN112377435 A CN 112377435A CN 202011182002 A CN202011182002 A CN 202011182002A CN 112377435 A CN112377435 A CN 112377435A
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CN
China
Prior art keywords
gear
driving
rotating
fan
driven
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202011182002.9A
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Chinese (zh)
Inventor
陈刚
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Individual
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Individual
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Filing date
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Priority to CN202011182002.9A priority Critical patent/CN112377435A/en
Publication of CN112377435A publication Critical patent/CN112377435A/en
Withdrawn legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/08Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/084Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation hand fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/06Units comprising pumps and their driving means the pump being electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/16Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/163Combinations of two or more pumps ; Producing two or more separate gas flows driven by a common gearing arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/16Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/02Applications of driving mechanisms, not covered by another subclass
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14Structural association with mechanical loads, e.g. with hand-held machine tools or fans

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses an ethanol normal-temperature drying system which comprises a supporting module and an execution module. The supporting module is arranged to drive the whole execution module of the device to rotate, so that power is provided for the rotation of the device, and all edge blowing fans of the device can rotate without using electric energy through the execution module, so that the use number of motors of the device is reduced, and the device is more energy-saving and environment-friendly when in use.

Description

Ethanol normal atmospheric temperature drying system
Technical Field
The invention relates to the technical field of organic synthesis, in particular to a normal-temperature drying system for ethanol.
Background
The ethanol is a flammable and volatile colorless transparent liquid at normal temperature and normal pressure, has low toxicity, and can not be directly drunk as a pure liquid; has special fragrance and slight irritation; slightly sweet and accompanied by pungent and spicy taste. Inflammable, its vapor can form explosive mixture with air, and it can be dissolved in water in any ratio. Is miscible with chloroform, diethyl ether, methanol, acetone and most other organic solvents, but when spilled accidentally, the alcohol runs around on the table or floor, which presents a fire hazard if not handled in a timely manner.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the ethanol normal-temperature drying system, which solves the problems that when the alcohol is accidentally spilled, the alcohol can flow everywhere on a table top or a bottom surface, and at the moment, if the alcohol is not treated in time, fire hazard can occur.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an ethanol normal atmospheric temperature drying system, is including supporting module and execution module, the support module include handle, stiffening rib, backup pad, rotation motor support, rotate the motor, rotate the driving gear, initiative center pivot, rotate driven gear, rotate the connecting plate, rotate spliced pole, swivel mount, central blast cover, central blast fan, blast air driven gear, blast air motor support and blast air driving gear, the top of handle is passed through stiffening rib fixedly connected with backup pad, and the top of backup pad is rotated and is connected with the rotation connecting plate, rotates the side of connecting plate through rotating spliced pole fixedly connected with swivel mount.
Execution module include marginal blast cover, marginal blast fan, blast cover link, passive fan, driving pulley, head end driven gear support, drive belt, head end driving gear, driving gear carrier, driven pulley support, marginal blast fan support, fan spliced pole, driving pulley, drive belt, terminal intermediate wheel support, terminal intermediate driving pulley, terminal intermediate driven gear and driven pulley, the outer fixed surface of center blast cover is connected with blast cover link, and the one end fixedly connected with marginal blast cover that central blast cover was kept away from to blast cover link, the inside of marginal blast cover is connected with marginal blast fan through marginal blast fan support rotation, and the side of marginal blast fan is through fan spliced pole fixedly connected with driving pulley.
Preferably, the side of the rotating connecting plate is fixedly connected with a rotating driven gear through a driving center rotating shaft, the outer surface gear of the rotating driven gear is connected with a rotating driving gear, a rotating motor is arranged on the side of the rotating driving gear, an output shaft of the rotating motor is fixedly connected with the rotating driving gear, and the rotating motor is fixedly connected with the supporting plate through a rotating motor support.
Preferably, the middle part of the side surface of the rotating frame is fixedly connected with a central blowing cover, the inside of the central blowing cover is rotatably connected with a central blowing fan, and the side of the central blowing fan is fixedly connected with a blowing driven gear through a connecting shaft.
Preferably, the outer surface gear of the air blowing driven gear is connected with an air blowing driving gear, a blower motor is arranged on the side of the air blowing driving gear, an output shaft of the blower motor is fixedly connected with the air blowing driving gear, and the blower motor is fixedly connected with the rotating frame through a blower motor support.
Preferably, the middle part of the side of the blast hood connecting frame is provided with a groove, the inside of the groove is rotatably connected with a driven fan, the side of the driven fan is fixedly connected with a head end driving gear through a connecting shaft, and the head end driving gear is rotatably connected with the side of the blast hood connecting frame.
Preferably, the outer surface gear of the head end driving gear is connected with a head end driven gear, the head end driven gear is rotatably connected with the blast hood connecting frame through a head end driven gear support, the side surface of the head end driven gear is fixedly connected with a driving belt wheel, and the side of the driving belt wheel is rotatably connected with a driven belt wheel through a transmission belt.
Preferably, the driven belt wheel is rotatably connected with the blast cover connecting frame through a driven belt wheel support, a driving gear carrier is fixedly connected to the side face of the driven belt wheel, and a driven gear in the middle of the tail end is connected to the outer surface of the driving gear carrier through a gear.
Preferably, the side of the middle driven gear at the tail end is fixedly connected with a middle driving pulley at the tail end through a connecting shaft, the middle driving pulley at the tail end and the middle driven gear at the tail end are rotatably connected with the rotating frame through a middle wheel bracket at the tail end, and the middle driving pulley at the tail end is rotatably connected with the driving pulley through a driving belt.
Compared with the prior art, the invention provides an ethanol normal-temperature drying system, which has the following beneficial effects: the supporting module is arranged to drive the whole execution module of the device to rotate, so that power is provided for the rotation of the device, and all edge blowing fans of the device can rotate without using electric energy through the execution module, so that the use number of motors of the device is reduced, and the device is more energy-saving and environment-friendly when in use.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of the present invention.
FIG. 3 is a schematic view of the present invention.
FIG. 4 is a block diagram of an embodiment of the present invention.
FIG. 5 is a block diagram of an embodiment of the present invention.
Fig. 6 is a schematic view of the blower motor according to the present invention.
In the figure: 1-a support module; 101-a handle; 102-a stiffening rib; 103-a support plate; 104-rotating the motor support; 105-a rotating electric machine; 106-a rotating drive gear; 107-active central spindle; 108-rotating the driven gear; 109-rotating the connecting plate; 110-a rotating connection column; 111-a rotating frame; 112-a central blower shield; 113-a central blower fan; 114-a blower driven gear; 115-blower motor; 116-a blower motor mount; 117-blower drive gear; 2-an execution module; 201-edge blower shield; 202-edge blower fan; 203-blast hood connection frame; 204-passive fan; 205-a drive pulley; 206-head end driven gear; 207-head end driven gear support; 208-a transmission belt; 209-head end drive gear; 210-drive carrier; 211-passive pulley carrier; 212-edge blower fan support; 213-a fan connection column; 214-a drive pulley; 215-drive belt; 216-end intermediate wheel support; 217-end intermediate drive pulley; 218-end intermediate driven gear; 219-passive pulley.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the present invention provides a technical solution: an ethanol normal temperature drying system comprises a support module 1 and an execution module 2, as shown in figure 1, figure 2 and figure 6, wherein the support module 1 comprises a handle 101, a reinforcing rib 102, a support plate 103, a rotating motor bracket 104, a rotating motor 105, a rotating driving gear 106, a driving central rotating shaft 107, a rotating driven gear 108, a rotating connecting plate 109, a rotating connecting post 110, a rotating frame 111, a central blowing cover 112, a central blowing fan 113, a blowing driven gear 114, a blowing motor 115, a blowing motor bracket 116 and a blowing driving gear 117, the top end of the handle 101 is fixedly connected with the support plate 103 through the reinforcing rib 102, the top end of the support plate 103 is rotatably connected with the rotating connecting plate 109, the side of the rotating connecting plate 109 is fixedly connected with the rotating frame 111 through the rotating connecting post 110, the side of the rotating connecting plate 109 is fixedly connected with the rotating driven, the outer surface gear of the rotary driven gear 108 is connected with a rotary driving gear 106, a rotary motor 105 is arranged on the side of the rotary driving gear 106, an output shaft of the rotary motor 105 is fixedly connected with the rotary driving gear 106, the rotary motor 105 is fixedly connected with the supporting plate 103 through a rotary motor support 104, a central blowing cover 112 is fixedly connected to the middle of the side surface of the rotary frame 111, a central blowing fan 113 is rotatably connected to the inside of the central blowing cover 112, a blowing driven gear 114 is fixedly connected to the side of the central blowing fan 113 through a connecting shaft, an outer surface gear of the blowing driven gear 114 is connected with a blowing driving gear 117, a blowing motor 115 is arranged on the side of the blowing driving gear 117, an output shaft of the blowing motor 115 is fixedly connected with the blowing driving gear 117, and the blowing motor 115 is.
As shown in fig. 4 and 5, the structure of the execution module of the present invention is shown, wherein the execution module 2 includes an edge blower cover 201, an edge blower fan 202, a blower cover connecting frame 203, a driven fan 204, a driving pulley 205, a head end driven gear 206, a head end driven gear bracket 207, a transmission belt 208, a head end driving gear 209, a driving gear bracket 210, a driven pulley bracket 211, an edge blower fan bracket 212, a fan connecting column 213, a driving pulley 214, a driving belt 215, a tail end intermediate wheel bracket 216, a tail end intermediate driving pulley 217, a tail end intermediate driven gear 218 and a driven pulley 219, the blower cover connecting frame 203 is fixedly connected to the outer surface of the center blower cover 112, the edge blower cover 201 is fixedly connected to one end of the blower cover connecting frame 203 far from the center blower cover 112, the edge blower fan 202 is rotatably connected to the inside of the edge blower cover 201 through the edge blower fan bracket 212, and the driving pulley 214 is fixedly connected, the middle part of the side of the blast hood connecting frame 203 is provided with a groove, the inner part of the groove is rotationally connected with a driven fan 204, the side of the driven fan 204 is fixedly connected with a head end driving gear 209 through a connecting shaft, the head end driving gear 209 is rotationally connected with the side of the blast hood connecting frame 203, the outer surface gear of the head end driving gear 209 is connected with a head end driven gear 206, the head end driven gear 206 is rotationally connected with the blast hood connecting frame 203 through a head end driven gear bracket 207, the side of the head end driven gear 206 is fixedly connected with a driving pulley 205, the side of the driving pulley 205 is rotationally connected with a driven pulley 219 through a driving belt 208, the driven pulley 219 is rotationally connected with the blast hood connecting frame 203 through a driven pulley bracket 211, the side of the driven pulley 219 is fixedly connected with a driving gear carrier 210, the outer surface gear of the driving gear carrier 210 is connected with a tail, an end intermediate driving pulley 217 and an end intermediate driven gear 218 are rotatably connected to the rotary frame 111 via an end intermediate wheel support 216, and the end intermediate driving pulley 217 is rotatably connected to the driving pulley 214 via a driving belt 215.
In use, when a user first starts the blower motor 115, the output shaft of the blower motor 115 drives the blower driving gear 117 to rotate, the rotation of the blower driving gear 117 drives the blower driven gear 114 to rotate, the rotation of the blower driven gear 114 drives the central blower fan 113 to rotate, meanwhile, when the rotation motor 105 is started, the output shaft of the rotation motor 105 drives the rotation driving gear 106 to rotate, the rotation driving gear 106 drives the rotation driven gear 108 to rotate, the rotation driven gear 108 drives the rotation connecting plate 109 to rotate through the driving central rotating shaft 107, the rotation connecting plate 109 drives the rotation bracket 111 to rotate through the rotation connecting column 110, the rotation bracket 111 drives the driven fan 204 to revolve, the revolution of the driven fan 204 rotates under the driving of air, and the rotation of the driven fan 204 drives the head end 209 to rotate, the rotation of the head driving gear 209 will drive the head driven gear 206 to rotate, the rotation of the head driven gear 206 will drive the driving pulley 205 to rotate, the rotation of the driving pulley 205 will drive the driven pulley 219 to rotate through the transmission belt 208, the rotation of the driven pulley 219 will drive the driving gear rack 210 to rotate, the rotation of the driving gear rack 210 will drive the middle driven gear 218 of the tail end to rotate, the rotation of the middle driven gear 218 of the tail end will drive the middle driving pulley 217 of the tail end to rotate, the rotation of the middle driving pulley 217 of the tail end will drive the driving pulley 214 to rotate through the driving belt 215, the rotation of the driving pulley 214 will drive the edge blowing fan 202 to rotate through the fan connecting column 213, the edge blowing fan 202 will drive the surrounding air to move, at this time.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides an ethanol normal atmospheric temperature drying system, includes support module (1) and execution module (2), its characterized in that: the supporting module (1) comprises a handle 101, reinforcing ribs (102), a supporting plate (103), a rotating motor support (104), a rotating motor (105), a rotating driving gear (106), a driving central rotating shaft (107), a rotating driven gear (108), a rotating connecting plate (109), a rotating connecting column (110), a rotating frame (111), a central blowing cover (112), a central blowing fan (113), a blowing driven gear (114), a blowing motor (115), a blowing motor support (116) and a blowing driving gear (117), wherein the top end of the handle (101) is fixedly connected with the supporting plate (103) through the reinforcing ribs (102), the top end of the supporting plate (103) is rotatably connected with the rotating connecting plate (109), and the side of the rotating connecting plate (109) is fixedly connected with the rotating frame (111) through the rotating connecting column (110);
the execution module (2) comprises an edge blast cover (201), an edge blast fan (202), a blast cover connecting frame (203), a driven fan (204), a driving pulley (205), a head end driven gear (206), a head end driven gear support (207), a transmission belt (208), a head end driving gear (209), a driving gear support (210), a driven pulley support (211), an edge blast fan support (212), a fan connecting column (213), a driving pulley (214), a driving belt (215), a tail end intermediate wheel support (216), a tail end intermediate driving pulley (217), a tail end intermediate driven gear (218) and a driven pulley (219), the outer surface of the center blast cover (112) is fixedly connected with the blast cover connecting frame (203), one end of the blast cover connecting frame (203) far away from the center blast cover (112) is fixedly connected with the edge blast cover (21), and the inside of the edge blast cover (201) is connected with the edge blast fan through the edge blast fan support (212) in a The side of the fan (202), the edge blowing fan (202) is fixedly connected with a driving belt wheel (214) through a fan connecting column (213).
2. The ethanol normal-temperature drying system according to claim 1, characterized in that: the side of rotation connecting plate (109) is through initiative center pivot (107) fixedly connected with rotation driven gear (108), and the surface gear connection who rotates driven gear (108) has rotation driving gear (106), and the side of rotating driving gear (106) is provided with rotation motor (105), and the output shaft and the rotation driving gear (106) fixed connection of rotation motor (105), rotation motor (105) and backup pad (103) are through rotating motor support (104) fixed connection.
3. The ethanol normal-temperature drying system according to claim 1, characterized in that: the central blowing hood (112) is fixedly connected to the middle of the side face of the rotating frame (111), a central blowing fan (113) is rotatably connected to the inside of the central blowing hood (112), and a blowing driven gear (114) is fixedly connected to the side of the central blowing fan (113) through a connecting shaft.
4. The ethanol normal-temperature drying system according to claim 1, characterized in that: the outer surface gear of the air blowing driven gear (114) is connected with an air blowing driving gear (117), an air blowing motor (115) is arranged on the side of the air blowing driving gear (117), an output shaft of the air blowing motor (115) is fixedly connected with the air blowing driving gear (117), and the air blowing motor (115) is fixedly connected with the rotating frame (111) through an air blowing motor support (116).
5. The ethanol normal-temperature drying system according to claim 1, characterized in that: the middle part of the side of the blast hood connecting frame (203) is provided with a groove, the inside of the groove is rotatably connected with a driven fan (204), the side of the driven fan (204) is fixedly connected with a head end driving gear (209) through a connecting shaft, and the head end driving gear (209) is rotatably connected with the side of the blast hood connecting frame (203).
6. The ethanol normal-temperature drying system according to claim 1, characterized in that: the outer surface gear connection of head end driving gear (209) has head end driven gear (206), and head end driven gear (206) rotate with blast casing link (203) through head end driven gear support (207) and are connected, the side fixedly connected with driving pulley (205) of head end driven gear (206), the side of driving pulley (205) is rotated through drive belt (208) and is connected with passive pulley (219).
7. The ethanol normal-temperature drying system according to claim 1, characterized in that: the driven belt wheel (219) is rotatably connected with the blast cover connecting frame (203) through a driven belt wheel support (211), a driving gear rack (210) is fixedly connected to the side face of the driven belt wheel (219), and a tail end middle driven gear (218) is connected to the outer surface gear of the driving gear rack (210).
8. The ethanol normal-temperature drying system according to claim 1, characterized in that: the side of the tail end middle driven gear (218) is fixedly connected with a tail end middle driving pulley (217) through a connecting shaft, the tail end middle driving pulley (21) and the tail end middle driven gear (218) are rotatably connected with the rotating frame (111) through a tail end middle wheel support (216), and the tail end middle driving pulley (217) is rotatably connected with the driving pulley (214) through a driving belt 215.
CN202011182002.9A 2020-10-29 2020-10-29 Ethanol normal atmospheric temperature drying system Withdrawn CN112377435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011182002.9A CN112377435A (en) 2020-10-29 2020-10-29 Ethanol normal atmospheric temperature drying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011182002.9A CN112377435A (en) 2020-10-29 2020-10-29 Ethanol normal atmospheric temperature drying system

Publications (1)

Publication Number Publication Date
CN112377435A true CN112377435A (en) 2021-02-19

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CN202011182002.9A Withdrawn CN112377435A (en) 2020-10-29 2020-10-29 Ethanol normal atmospheric temperature drying system

Country Status (1)

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CN (1) CN112377435A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000064994A (en) * 1998-08-21 2000-03-03 Ishikawajima Harima Heavy Ind Co Ltd Centrifugal compressor
CN2611646Y (en) * 2003-01-24 2004-04-14 陈家德 Multi-rotor ceiling fan structure with revolution and rotation
US6722859B1 (en) * 2002-10-23 2004-04-20 Chia-Teh Chen Electromagnetic device capable of controlling the revolving speed of a multi-fan assembly
CN110848161A (en) * 2019-11-30 2020-02-28 徐州市耐力高分子科技有限公司 Workshop cooling device
CN210858779U (en) * 2019-11-11 2020-06-26 大同煤炭职业技术学院 Colliery ventilation adjusting equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000064994A (en) * 1998-08-21 2000-03-03 Ishikawajima Harima Heavy Ind Co Ltd Centrifugal compressor
US6722859B1 (en) * 2002-10-23 2004-04-20 Chia-Teh Chen Electromagnetic device capable of controlling the revolving speed of a multi-fan assembly
CN2611646Y (en) * 2003-01-24 2004-04-14 陈家德 Multi-rotor ceiling fan structure with revolution and rotation
CN210858779U (en) * 2019-11-11 2020-06-26 大同煤炭职业技术学院 Colliery ventilation adjusting equipment
CN110848161A (en) * 2019-11-30 2020-02-28 徐州市耐力高分子科技有限公司 Workshop cooling device

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Application publication date: 20210219