Indoor and outdoor mixed air supply system device matched with film blowing machine

Abstract

The utility model belongs to the technical field of film blowing machines, and particularly relates to an indoor and outdoor mixed air supply system device matched with a film blowing machine. The utility model discloses an indoor and outdoor mixed air supply system device matched with a film blowing machine. The indoor and outdoor mixed air supply system device comprises a film blowing machine, an air blowing pipeline, an air blower, a mixed gas temperature sensor, an air mixing chamber, a workshop air inlet pipeline, a workshop temperature sensor, a workshop air inlet valve, an outdoor cold air valve, an outdoor cold air temperature sensor, an outdoor cold air pipeline, a workshop main cold air pipeline, an outdoor air chamber and a metal pipe fin heat exchanger. A non-woven fabric air filter screen, an air conditioner external unit and an MCU microprocessor STM32; the indoor and outdoor mixed air supply system device has the beneficial effects that after the indoor and outdoor mixed air supply system device is adopted, the dew point position of the film blowing machine moves downwards, a plastic film is well cooled, the working efficiency of the film blowing machine is improved by 20 percent, the single-machine yield is improved by 50 kilograms, the daily yield of eight film blowing machines is improved by 400 kilograms, and the plastic film is flat, free of wrinkles and good in elasticity.

Description

Technical Field

[0001] The utility model belongs to the technical field of film blowing machines, and in particular relates to an indoor and outdoor mixed air supply system device matched with the film blowing machine. Background Art

[0002] The film blowing machine here refers to the polyethylene blown film processing equipment, and the low-density polyethylene (LDPE) film is produced by the film blowing machine. In the production process of polyethylene blown film, the following process parameters are usually controlled: 1. Extruder temperature; when blowing low-density polyethylene (LDPE) film, the extrusion temperature is generally controlled between 160℃ and 170℃. 2. Blowing ratio; The blowing ratio refers to the ratio between the diameter of the film bubble after blowing and the diameter of the tube ring before blowing. 3. Pulling ratio; The pulling ratio refers to the ratio between the pulling speed of the film and the extrusion speed of the tube ring. The pulling ratio of low-density polyethylene (LDPE) film is generally controlled between 4 and 6. 4. Dew point; The dew point refers to the dividing line where the plastic enters the high elastic state from the viscous flow state. The main factor affecting the position of the dew point dividing line is the temperature of the film blowing gas; the cooler the blower inlet air, the lower the temperature of the film blowing gas, the faster the extruded film can be cooled, and the corresponding pulling host speed can be increased, and the pulling ratio can be increased to increase the plastic film production capacity. The ideal film blowing gas temperature is 8 degrees. Further research found that the appropriate gas temperature for film blowing is 8-18 degrees; existing film blowing machines all take air directly from the workshop; due to the heating of the extruder, the temperature in the film blowing workshop is 40 degrees in summer and 20 degrees in winter. Obviously, the indoor gas temperature does not meet the film blowing temperature requirements. The space of the blow molding workshop is very large and there are multiple film blowing machines. It is also difficult to control the ambient temperature of the workshop manually; the inventor changed the air path structure of the film blowing machine and established an outdoor wind chamber outside the workshop. After the indoor and outdoor air are mixed, the air is supplied to the film blowing machine; the outdoor temperature is 40 degrees in summer and 0 degrees in winter. When the temperature of the outdoor air chamber is higher than 20 degrees, the outdoor wind chamber is cooled by air conditioning; the cooled gas is used to supply air to the film blowing machine to increase the output of the film blowing machine. The specific method is to set up an outdoor wind chamber outside the workshop, the outdoor wind chamber is connected to the main air-conditioning duct of the workshop, and the main air supply duct is divided into multiple branch air-conditioning ducts in the workshop to supply air to the film blowing machine. Utility Model Content

[0003] In order to improve the working efficiency of a film blowing machine and increase an outdoor wind chamber, the utility model provides an indoor and outdoor mixed air supply system device matched with the film blowing machine.

[0004] The technical solution of the utility model is: an indoor and outdoor mixed air supply system device matched with a film blowing machine, the indoor and outdoor mixed air supply system device comprises a film blowing machine, an air blast pipe, a blower, a mixed gas temperature sensor, a gas mixing chamber, an on-site air intake pipe, an on-site temperature sensor, an on-site air intake valve, an outdoor cold air valve, an outdoor cold air temperature sensor, a branch cold air pipe in a workshop, a main cold air pipe in a workshop, an outdoor air chamber, a metal tube fin heat exchanger, a non-woven air filter, an air conditioner outdoor unit, an on-site display and an MCU microprocessor STM32;

[0005] The outdoor air chamber is a closed cube built outside the film blowing machine workshop, an air inlet window is arranged on the shady side of the closed cube, a non-woven air filter is arranged outside the air inlet window, and the outside of the non-woven air filter is the outdoor atmosphere; a metal tube fin heat exchanger is arranged inside the air inlet window, and the metal tube fin heat exchanger pipeline is connected to the air conditioner outdoor unit;

[0006] The metal tube fin heat exchanger is a heat exchanger in which metal fins are arranged around the metal tube in close contact with the metal tube to increase the surface area of ​​the metal tube and accelerate heat dissipation. The metal tube and the metal fins are preferably made of copper. The metal tube fin heat exchanger is installed behind the air inlet window of the outdoor air chamber, and the size of the metal tube fin heat exchanger is adapted to the air inlet window of the outdoor air chamber.

[0007] The outdoor air chamber is connected to the main air conditioning pipe of the workshop, the main air conditioning pipe of the workshop is connected to the multi-way branch air conditioning pipes in the workshop, the outdoor air conditioning temperature sensor is arranged inside the branch air conditioning pipes in the workshop, the branch air conditioning pipes in the workshop are connected to the mixing chamber through the outdoor air conditioning valve, and the mixed gas temperature sensor is arranged in the pipe connecting the mixing chamber to the blower; the on-site air intake valve is connected to the mixing chamber through the on-site air intake pipe, and the on-site temperature sensor is arranged inside the on-site air intake pipe; the mixing chamber pipe is connected to the air inlet of the blower, and the blower is connected to the film blowing machine through the air blowing pipe;

[0008] The air inlet of the blower is transmitted through the branch air conditioning pipe in the workshop and the main air conditioning pipe in the workshop. The interior of the outdoor air chamber is under negative pressure. The outdoor air passes through the non-woven air filter and the metal tube fin heat exchanger and enters the outdoor air chamber.

[0009] The mixed gas temperature sensor, the on-site temperature sensor and the outdoor cold air temperature sensor are electrically connected to the MCU microprocessor STM32STM32, and the MCU microprocessor STM32STM32 is electrically connected to the air conditioner outdoor unit, the outdoor cold air valve, the on-site display and the on-site air intake valve.

[0010] The utility model introduces the technical method of an indoor and outdoor mixed air supply system device matched with a film blowing machine:

[0011] The on-site temperature here represents the gas temperature in the workshop, which is collected by the on-site temperature sensor; the outdoor air chamber temperature represents the gas temperature inside the outdoor air chamber, which is collected by the outdoor cold air temperature sensor; the mixing chamber has two air intake pipes, one is from the workshop site, and the on-site air intake valve is connected to the mixing chamber through the on-site air intake pipe; the other is from the outdoor air chamber through the workshop main cold air pipe, the branch cold air pipe in the workshop and the outdoor cold air valve to the mixing chamber; the mixing chamber pipe is connected to the blower air inlet, and the blower is connected to the film blowing machine through the blower pipe;

[0012] Each film blowing machine is equipped with its own MCU microprocessor STM32STM32, which monitors the mixed gas temperature output from the mixing chamber in real time. The MCU microprocessor STM32STM32 adjusts the opening and closing angles of the outdoor cold air valve and the on-site air intake valve in real time according to the temperature in the workshop and the temperature in the outdoor air chamber to ensure that the film blowing gas temperature is at the set temperature; if the outdoor air chamber temperature is higher than the set temperature, the MCU microprocessor STM32 starts the air conditioner outdoor unit to cool the internal temperature of the outdoor air chamber to ensure that the film blowing gas temperature is at the set temperature;

[0013] The internal temperature of the workshop is 15 degrees in winter and 40 degrees in summer, which serves as the on-site air source for the film blowing machine; the on-site air intake valve pipeline is connected to the on-site air intake pipeline, and the on-site air intake pipeline is connected to the mixing chamber; the on-site temperature sensor and the mixed gas temperature sensor are electrically connected to the MCU microprocessor STM32STM32, and the MCU microprocessor STM32STM32 monitors the mixed gas temperature in real time and controls the opening angle of the on-site air intake valve;

[0014] The temperature outside the workshop is below 0 degrees in winter and 40 degrees in summer, which serves as the outdoor air source for the film blowing machine; the outdoor air chamber is connected to the main air-conditioning pipe of the workshop, the main air-conditioning pipe of the workshop is connected to the branch air-conditioning pipe in the workshop, and the branch air-conditioning pipe in the workshop is connected to the mixing chamber through the outdoor air-conditioning valve; the outdoor air-conditioning temperature sensor, the field temperature sensor, and the mixed gas temperature sensor are electrically connected to the MCU microprocessor STM32STM32; the MCU microprocessor STM32STM32 monitors the mixed gas temperature in real time and controls the opening angle of the field air intake valve and the outdoor air-conditioning valve.

[0015] The on-site display shows the on-site workshop temperature, outdoor air chamber temperature, mixed gas temperature and the 24-hour workshop temperature, outdoor air chamber temperature, mixed gas temperature change curves.

[0016] The utility model has the beneficial effects of an indoor and outdoor mixed air supply system device matched with a film blowing machine: after adopting the indoor and outdoor mixed air supply system device, the dew point position of the film blowing machine is stable, the plastic film is well cooled, and the working efficiency of the film blowing machine is improved by 20%; the output of a single film blowing machine is increased by 50 kilograms, and the daily output of 8 film blowing machines is increased by 400 kilograms, and the plastic film is flat, wrinkle-free, and has good elasticity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structure diagram of an indoor and outdoor mixed air supply system device matched with a film blowing machine.

[0018] Figure 2 The invention discloses a circuit diagram of an indoor and outdoor mixed air supply system device matched with a film blowing machine.

[0019] Figure 3 It is a temperature curve diagram of indoor and outdoor mixed gases of the indoor and outdoor mixed air supply system device matched with the film blowing machine.

[0020] In the figure: 1. Film blowing machine, 2. Blowing duct, 3. Blower, 4. Mixed gas temperature sensor, 5. Mixing chamber, 6. On-site air intake duct, 7. On-site temperature sensor, 8. On-site air intake valve, 9. Outdoor cold air valve, 10. Outdoor cold air temperature sensor, 11. Branch cold air duct in the workshop, 12. Main cold air duct in the workshop, 13. Outdoor air chamber, 14. Metal tube fin heat exchanger, 15. Non-woven air filter, 16. Air conditioner outdoor unit, 17. On-site display, 18. MCU microprocessor STM32. DETAILED DESCRIPTION

[0021] Example Taking a film blowing machine workshop of a company as an example, the film blowing machine workshop is equipped with 8 film blowing machines. Figure 1 The invention is described as follows: an indoor and outdoor mixed air supply system device matched with a film blowing machine (1), the indoor and outdoor mixed air supply system device comprising a film blowing machine (1), an air blowing duct (2), an air blower (3), a mixed gas temperature sensor (4), an air mixing chamber (5), an on-site air intake duct (6), an on-site temperature sensor (7), an on-site air intake valve (8), an outdoor cold air valve (9), an outdoor cold air temperature sensor (10), a branch cold air duct in a workshop (11), a main cold air duct in a workshop (12), an outdoor air chamber (13), a metal tube fin heat exchanger (14), a non-woven fabric air filter (15), an air conditioner outdoor unit (16), an on-site display (17) and an MCU microprocessor STM32 (18);

[0022] The outdoor air chamber (13) is a closed cube built outside the film blowing machine (1) workshop, an air inlet window is arranged on the dark side of the closed cube, a non-woven fabric air filter (15) is arranged outside the air inlet window, and the outside of the non-woven fabric air filter (15) is the outdoor atmosphere; a metal tube fin heat exchanger (14) is arranged inside the air inlet window, and a pipeline of the metal tube fin heat exchanger (14) is connected to an air conditioner outdoor unit (16);

[0023] The metal tube fin heat exchanger (14) is a metal tube with metal fins arranged around it and in close contact with the metal tube to increase the surface area of ​​the metal tube and accelerate heat dissipation. The metal tube and the metal fins are preferably made of copper. The metal tube fin heat exchanger (14) is installed behind the air inlet window of the outdoor air chamber (13). The size of the metal tube fin heat exchanger (14) is adapted to the air inlet window of the outdoor air chamber (13).

[0024] The outdoor air chamber (13) is connected to the main cold air pipeline (12) of the workshop, the main cold air pipeline (12) of the workshop is connected to multiple branch cold air pipelines (11) in the workshop, an outdoor cold air temperature sensor (10) is arranged inside the branch cold air pipeline (11) in the workshop, the branch cold air pipeline (11) in the workshop is connected to the mixing chamber (5) through the outdoor cold air valve (9), and a mixed gas temperature sensor (4) is arranged in the pipeline connecting the mixing chamber (5) to the blower (3); the on-site air intake valve (8) is connected to the mixing chamber (5) through the on-site air intake pipeline (6), and a on-site temperature sensor (7) is arranged inside the on-site air intake pipeline (6); the pipeline of the mixing chamber (5) is connected to the air inlet of the blower (3), and the blower (3) is connected to the film blowing machine (1) through the air blowing pipeline (2);

[0025] The blower (3) works, and the air is transmitted through the branch air-conditioning pipe (11) in the workshop and the main air-conditioning pipe (12) in the workshop, and the interior of the outdoor air chamber (13) is under negative pressure. The outdoor air passes through the non-woven air filter (15) and the metal tube fin heat exchanger (14) and enters the outdoor air chamber (13);

[0026] The mixed gas temperature sensor (4), the on-site temperature sensor (7) and the outdoor cold air temperature sensor (10) are electrically connected to the MCU microprocessor STM32 (18), and the MCU microprocessor STM32 (18) is electrically connected to the air conditioner outdoor unit (16), the outdoor cold air valve (9), the on-site display (17) and the on-site air intake valve (8).

[0027] The utility model introduces a technical method of an indoor and outdoor mixed air supply system device matched with a film blowing machine (1):

[0028] The on-site temperature here represents the gas temperature in the workshop, which is collected by the on-site temperature sensor (7); the temperature of the outdoor air chamber (13) represents the gas temperature inside the outdoor air chamber (13), which is collected by the outdoor cold air temperature sensor (10); the mixing chamber (5) has two air intake pipes, one of which is for air intake from the workshop site, and the on-site air intake valve (8) is connected to the mixing chamber (5) through the on-site air intake pipe (6); the other is for air intake from the outdoor air chamber (13) through the workshop main cold air pipe (12), the branch cold air pipe (11) in the workshop and the outdoor cold air valve (9) to the mixing chamber (5); the mixing chamber (5) pipe is connected to the air inlet of the blower (3), and the blower (3) is connected to the film blowing machine (1) through the blower pipe (2);

[0029] Each film blowing machine (1) is equipped with its own MCU microprocessor STM32 (18). The MCU microprocessor STM32 (18) monitors the temperature of the mixed gas output from the mixing chamber (5) in real time, and adjusts the opening and closing angles of the outdoor cold air valve (9) and the on-site air intake valve (8) in real time according to the temperature in the workshop and the temperature of the outdoor air chamber (13) to ensure that the film blowing gas temperature is at the set temperature; if the temperature of the outdoor air chamber (13) is higher than the set temperature, the MCU microprocessor STM32 (18) starts the air conditioning outdoor unit (16) to cool the internal temperature of the outdoor air chamber (13) to ensure that the film blowing gas temperature is at the set temperature;

[0030] The temperature inside the workshop is 15 degrees in winter and 40 degrees in summer, which serves as the on-site air source for the film blowing machine (1); the on-site air intake valve (8) is connected to the on-site air intake pipeline (6), and the on-site air intake pipeline (6) is connected to the mixing chamber (5); the on-site temperature sensor (7) and the mixed gas temperature sensor (4) are electrically connected to the MCU microprocessor STM32 (18), and the MCU microprocessor STM32 (18) monitors the mixed gas temperature in real time and controls the opening angle of the on-site air intake valve (8);

[0031] The temperature outside the workshop is below 0 degrees in winter and 40 degrees in summer, which serves as the outdoor air source for the film blowing machine (1); the outdoor air chamber (13) is connected to the main cold air pipeline (12) of the workshop, the main cold air pipeline (12) of the workshop is connected to the branch cold air pipeline (11) in the workshop, and the branch cold air pipeline (11) in the workshop is connected to the mixing chamber (5) through the outdoor cold air valve (9); the outdoor cold air temperature sensor (10), the on-site temperature sensor (7), and the mixed gas temperature sensor (4) are electrically connected to the MCU microprocessor STM32 (18); the MCU microprocessor STM32 (18) monitors the mixed gas temperature in real time and controls the opening angles of the on-site air intake valve (8) and the outdoor cold air valve (9);

[0032] The on-site display (17) displays the workshop temperature, outdoor air chamber temperature, mixed gas temperature and 24-hour workshop temperature, outdoor air chamber temperature, mixed gas temperature change curves.

[0033] The utility model has the beneficial effects of an indoor and outdoor mixed air supply system device matched with a film blowing machine: after adopting the indoor and outdoor mixed air supply system device, the dew point position of the film blowing machine is stable, the plastic film is well cooled, and the working efficiency of the film blowing machine is improved by 20%; the output of a single film blowing machine is increased by 50 kilograms, and the daily output of 8 film blowing machines is increased by 400 kilograms, and the plastic film is flat, wrinkle-free, and has good elasticity.

Claims

1. An indoor and outdoor mixed air supply system device matched with a film blowing machine, characterized in that: The indoor and outdoor mixed air supply system device comprises a film blowing machine (1), an air blast duct (2), an air blower (3), a mixed gas temperature sensor (4), an air mixing chamber (5), an on-site air intake duct (6), an on-site temperature sensor (7), an on-site air intake valve (8), an outdoor cold air valve (9), an outdoor cold air temperature sensor (10), a branch cold air duct in a workshop (11), a main cold air duct in a workshop (12), an outdoor air chamber (13), a metal tube fin heat exchanger (14), a non-woven fabric air filter (15), an air conditioner outdoor unit (16), an on-site display (17) and an MCU microprocessor STM32 (18); the outdoor air chamber (13) is built outside the film blowing machine (1) workshop. A closed cube is provided, an air inlet window is arranged on the dark side of the closed cube, a non-woven fabric air filter (15) is arranged outside the air inlet window, and the outside of the non-woven fabric air filter (15) is the outdoor atmosphere; a metal tube fin heat exchanger (14) is arranged inside the air inlet window, and the metal tube fin heat exchanger (14) is connected to an air conditioner outdoor unit (16) through a pipeline; the metal tube fin heat exchanger (14) is a metal tube provided with metal fins in close contact with the metal tube around the metal tube to increase the surface area of ​​the metal tube and accelerate heat dissipation, and the metal tube and the metal fins are made of copper; the metal tube fin heat exchanger (14) is installed behind the air inlet window of the outdoor air chamber (13), and the size of the metal tube fin heat exchanger (14) is similar to the air inlet window of the outdoor air chamber (13). Adaptation; the outdoor air chamber (13) is connected to the main cold air pipe (12) of the workshop, the main cold air pipe (12) of the workshop is connected to multiple branch cold air pipes (11) in the workshop, the branch cold air pipes (11) in the workshop are provided with outdoor cold air temperature sensors (10), the branch cold air pipes (11) in the workshop are connected to the mixing chamber (5) through the outdoor cold air valve (9), and the mixed gas temperature sensor (4) is provided in the pipe connecting the mixing chamber (5) to the blower (3); the on-site air intake valve (8) is connected to the mixing chamber (5) through the on-site air intake pipe (6), and the on-site temperature sensor (7) is provided inside the on-site air intake pipe (6); the pipe of the mixing chamber (5) is connected to the air inlet of the blower (3), and the blower (3) is connected to the mixing chamber (5) through the on-site air intake pipe (6). ) is connected to the film blowing machine (1) through the blast duct (2); the air inlet of the blower (3) is transmitted through the branch cold air duct (11) in the workshop and the main cold air duct (12) in the workshop, and the interior of the outdoor air chamber (13) is negative pressure, and the outdoor air passes through the non-woven air filter (15) and the metal tube fin heat exchanger (14) to enter the outdoor air chamber (13); the mixed gas temperature sensor (4), the field temperature sensor (7) and the outdoor cold air temperature sensor (10) are electrically connected to the MCU microprocessor STM32 (18), and the MCU microprocessor STM32 (18) is electrically connected to the air conditioner outdoor unit (16), the outdoor cold air valve (9), the field display (17) and the field air intake valve (8).

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