Industrial air constant temperature and humidity device

Abstract

An industrial air constant temperature and humidity device relates to the technical field of industrial environment equipment, comprising a base, to which a preheating box and a steam box are fixedly connected, the preheating box is connected to the steam box via a heat balance valve, the steam box is connected to the air supply box via a steam hose, the air supply box is connected to the preheating box via a condensation hose, and the outer surfaces of the preheating box, the steam box and the air supply box are integrally covered with an insulation layer.

Description

Technical Field

[0001] The invention relates to the technical field of industrial environment equipment, in particular to an industrial air constant temperature and humidity device. Background Art

[0002] Organic or inorganic fibers use flowing air as the working medium in the dry spinning process, which plays a role in forming, collecting and stabilizing the fiber forming process, and has strict requirements on the accuracy of air humidity and temperature.

[0003] The existing humidification technology principles are divided into isothermal humidification and isenthalpic humidification. Isothermal humidification includes electrode steam humidification and electric steam humidification. Isenthalpic humidification includes wet film humidification, high-pressure micro-mist humidification, ultrasonic humidification, etc. The isenthalpic humidification principle generally has low humidification efficiency, low water utilization rate, and cannot be accurately adjusted. During the humidification process, the evaporation of water absorbs heat, causing the air temperature to drop significantly, and cannot be applied to the above working conditions. The isothermal humidification principle, in which the electrode steam humidification device works by using the ion conduction heating in the water to generate steam. It needs to be shut down for sewage discharge and water replenishment every certain period of time, and cannot operate continuously. The working principle of the electric steam humidification device is that the electric heating tube heats the water to generate steam, and water is replenished when the liquid level in the heating chamber drops. During the water replenishment process, the temperature in the heating chamber drops, and the steam generation stops. It needs to be heated to the boiling point before normal humidification. The humidification amount fluctuates and cannot operate stably. Therefore, it is necessary to improve and find a method for sustainable and stable isothermal humidification of air and accurately control it, and maintain the air temperature stable during the humidification process. Summary of the invention

[0004] The purpose of the present invention is to provide an industrial air constant temperature and humidity device to solve the high-precision and stable control of industrial air humidity and temperature in view of the above problems.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] An industrial air constant temperature and humidity device comprises a base, to which a preheating box and a steam box are fixedly connected, the preheating box is connected to the steam box via a heat balance valve, the steam box is connected to the air supply box via a steam hose, the air supply box is connected to the preheating box via a condensation hose, and the outer surfaces of the preheating box, the steam box and the air supply box are integrally covered with a thermal insulation layer.

[0007] Furthermore, the insulation layer is made of inorganic insulation material with a thermal conductivity of ≤0.055W (m·k), wherein the steam hose and the condensation hose are made of one of rubber, polytetrafluoroethylene, silicone, and stainless steel bellows.

[0008] Furthermore, a pressure sensor is installed on the upper part of the steam box, a liquid level sensor and a first temperature sensor are installed on the left side of the steam box, a steam heating pipe is installed inside the steam box, and a second drain valve is installed at the bottom of the steam box.

[0009] Furthermore, the body of the steam box is made of 304 stainless steel; the second drain valve adopts a polytetrafluoroethylene sealing gasket; the pressure sensor adopts a 304 stainless steel pressure joint with a heat dissipation structure; and the steam heating pipe adopts a 321 stainless steel shell.

[0010] Furthermore, an exhaust valve is installed on the upper part of the preheating box, a float valve is installed on the right side of the preheating box, the right side of the float valve is connected to the water inlet valve, a third temperature sensor is installed in the middle of the right side of the preheating box, a hot water heating pipe is installed inside the preheating box, a first drain valve is installed at the bottom of the preheating box, the preheating box body is made of 304 stainless steel, and the first drain valve uses a PTFE sealing pad. The third temperature sensor is made of 304 stainless steel. The hot water heating pipe uses a stainless steel shell. The water used in the preheating box uses RO reverse osmosis purified water with a conductivity of ≤10μS / cm.

[0011] Furthermore, a fan is installed on the left side of the air supply box, a heat exchanger is installed on the left side of the air supply box, a second temperature sensor is installed on the left side of the bottom of the air supply box, a steam nozzle is installed in the middle of the bottom of the air supply box, a humidity sensor is installed on the right side of the bottom of the air supply box, and a flow equalizing plate is installed on the right side of the air supply box.

[0012] Furthermore, the air supply box is made of 304 stainless steel plate by bending, and the fan is a centrifugal fan with an air volume of 4100-5400m3 / h and a wind pressure of 1200 Pa. The flow equalizing plate is made of 304 stainless steel woven mesh or perforated plate structure.

[0013] Furthermore, the steam nozzle includes a nozzle shell, the left side of the nozzle shell is a steam inlet, which is connected to the steam box through a steam hose, a condensation reflux port is arranged on the left side of the bottom of the nozzle shell, a steam guide plate is arranged inside the nozzle shell, steam nozzles are evenly arranged on the upper part of the nozzle shell, the upper part of the steam guide plate is a steam chamber, and the lower part is a condensation reflux chamber.

[0014] Furthermore, the nozzle shell and the steam guide plate are made of 321 stainless steel. The steam guide plate is welded inside the nozzle shell to isolate the upper steam chamber and the lower condensation reflux chamber. The right end of the steam guide plate is offset downward by 3 mm relative to the horizontal axis of the nozzle shell, and the condensation reflux port is connected to the preheating box through a condensation hose.

[0015] Furthermore, the thermal balance valve includes a valve body, a valve core is arranged in the valve body, the left side of the valve core is a high-temperature chamber, the right side of the valve core is a low-temperature chamber, the valve core is connected to the thermistor push rod through an adjusting rod, and a thermistor element is installed at the rear of the thermistor push rod.

[0016] Furthermore, the high temperature chamber is connected to the steam box, and the low temperature chamber is connected to the preheating box. The valve body and valve core are made of stainless steel or brass.

[0017] Furthermore, a control cabinet is installed on the base, and the control cabinet is connected to the liquid level sensor, the first temperature sensor, the pressure sensor, the second temperature sensor, the humidity sensor, and the third temperature sensor through signal cables. The control cabinet is connected to the hot water heating pipe, the steam heating pipe, and the fan through control cables. The control cabinet is provided with a display screen, operation buttons, a program controller, a power regulator, and a frequency converter.

[0018] Furthermore, the fan of the air supply box is a centrifugal fan.

[0019] Furthermore, the gas source connector is connected to the pressure regulating valve through a pipeline, the pressure regulating valve is connected to the flow regulating valve through a pipeline, the flow regulating valve is connected to the diffusion chamber through a pipeline, and the diffusion chamber is connected to the left side of the air supply box body through a flange.

[0020] The beneficial effects of the present invention are as follows: the present invention not only solves the problem of high-precision and stable control of industrial air humidity and temperature, but also especially solves the problems of fiber forming and diameter uniformity in the dry spinning process of organic or inorganic fibers, and provides strong support for improving the output and quality of the production line, with significant economic benefits; the present invention solves the problem that the existing air humidification technology cannot stably humidify, and at the same time has a constant temperature function, and is well suitable for the dry spinning process of organic or inorganic fibers; the present invention has a high degree of automation and high precision in constant temperature and humidity control of air; the present invention provides a steam nozzle technology, which optimizes the steam-water separation structure; the present invention provides a temperature balancing valve technology, which realizes self-adjustment without external power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structural principle of the present invention;

[0022] Figure 2 is a radial cross-sectional view of the steam nozzle;

[0023] Figure 3 is an axial cross-sectional view of the steam nozzle;

[0024] Figure 4 This is the front view of the steam nozzle;

[0025] Figure 5 It is a schematic diagram of the structure of the heat balance valve component of the present invention;

[0026] Figure 6 This is a schematic diagram of the structural principle of Embodiment 2 of the present invention;

[0027] In the figure: 1, base; 2, control cabinet; 3, fan; 4, heat exchanger; 5, steam nozzle; 6, air box; 7, liquid level sensor; 8, first temperature sensor; 9, pressure sensor; 10, second temperature sensor; 11, steam hose; 12, condensation hose; 13, humidity sensor; 14, flow plate; 15, exhaust valve; 16, float valve; 17, water inlet valve; 18, third temperature sensor; 19, hot water heating pipe; 20, preheating box; 21, first drain valve; 22, Insulation layer; 23. Heat balance valve; 24. Second drain valve; 25. Steam box; 26. Steam heating pipe; 27. Nozzle shell; 28. Condensation reflux port; 29. ​​Steam guide plate; 30. Steam nozzle; 31. Condensation reflux chamber; 32. Steam chamber; 33. Adjustment rod; 34. Thermistor push rod; 35. Thermistor element; 36. Low-temperature chamber; 37. Valve core; 38. High-temperature chamber; 39. Valve body; 40. Gas source connector; 41. Pressure regulating valve; 42. Flow regulating valve; 43. Diffusion chamber. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figures 1 to 5 As shown, an industrial air constant temperature and humidity device includes a base 1, to which a preheating box 20 and a steam box 25 are fixedly connected, the preheating box 20 is connected to the steam box 25 through a heat balance valve 23, the steam box 25 is connected to the air supply box 6 through a steam hose 11, and the air supply box 6 is connected to the preheating box 20 through a condensation hose 12, and the outer surfaces of the preheating box 20, the steam box 25 and the air supply box 6 are covered with a thermal insulation layer 22 as a whole.

[0031] The solution is detailed. The material of the thermal insulation layer 22 is an inorganic insulating material with a thermal conductivity of ≤0.055W (m·k). The material of the steam hose 11 and the condensation hose 12 includes one of rubber, polytetrafluoroethylene, silicone, and stainless steel bellows.

[0032] In at least one embodiment, a pressure sensor 9 is installed on the upper part of the steam box 25, a liquid level sensor 7 and a first temperature sensor 8 are installed on the left side of the steam box 25, a steam heating pipe 26 is installed inside the steam box 25, and a second drain valve 24 is installed at the bottom of the steam box 25.

[0033] The scheme is detailed. The body of the steam box 25 is made of 304 stainless steel; the second drain valve 24 uses a polytetrafluoroethylene sealing gasket; the pressure sensor 9 uses a 304 stainless steel pressure joint with a heat dissipation structure; the steam heating pipe 26 uses a 321 stainless steel shell with electric heating.

[0034] In at least one embodiment, an exhaust valve 15 is installed on the upper part of the preheating box 20, a float valve 16 is installed on the right side of the preheating box 20, and the right side of the float valve 16 is connected to the water inlet valve 17. A third temperature sensor 18 is installed in the middle of the right side of the preheating box 20, a hot water heating pipe 19 is installed inside the preheating box 20, and a first drain valve 21 is installed at the bottom of the preheating box 20. The box body of the preheating box 20 is made of 304 stainless steel, and the first drain valve 21 uses a PTFE sealing pad. The third temperature sensor 18 is made of 304 stainless steel. The hot water heating pipe 19 uses an electrically heated 321 stainless steel shell. The water used in the preheating box 20 uses RO reverse osmosis purified water with a conductivity of ≤10μS / cm.

[0035] In at least one embodiment, a fan 3 is installed on the left side of the air supply box 6, a heat exchanger 4 is installed on the left side inside the air supply box 6, a second temperature sensor 10 is installed on the left side of the bottom of the air supply box 6, a steam nozzle 5 is installed in the middle of the bottom of the air supply box 6, a humidity sensor 13 is installed on the right side of the bottom of the air supply box 6, and a flow equalizing plate 14 is installed on the right side of the air supply box 6.

[0036] The scheme is detailed. The air box 6 is made of 304 stainless steel plate by bending. The fan 3 is a centrifugal fan with an air volume of 4100-5400m3 / h and a wind pressure of 1200Pa. The flow equalizer 14 is made of 304 stainless steel woven mesh or perforated plate structure to reduce turbulence. The airflow sent out of the flow equalizer 14 can be directly used in process equipment or transported to the place of use through pipelines. The heat exchanger 4 uses an air-cooled or water-cooled air conditioning module with two modes of cooling and heating.

[0037] In at least one embodiment, the steam nozzle 5 includes a nozzle shell 27, the left side of the nozzle shell 27 is a steam inlet, which is connected to the steam box 25 through a steam hose 11, a condensation reflux port 28 is arranged on the left side of the bottom of the nozzle shell 27, a steam guide plate 29 is arranged inside the nozzle shell 27, and steam nozzles 30 are evenly arranged on the upper part of the nozzle shell 27, the upper part of the steam guide plate 29 is a steam chamber 32, and the lower part is a condensation reflux chamber 31.

[0038] The solution is refined. The nozzle shell 27 and the steam guide plate 29 are made of 321 stainless steel. The steam guide plate 29 is welded inside the nozzle shell 27 to isolate and form an upper steam chamber 32 and a lower condensation reflux chamber 31. The right end of the steam guide plate 29 is offset downward by 3 mm relative to the horizontal axis of the nozzle shell 27 to form a slope to facilitate the condensate to enter the condensation reflux chamber 31 and be discharged from the condensation reflux port 28. The condensation reflux port 28 is connected to the preheating box 20 through the condensation hose 12 for recycling.

[0039] In at least one embodiment, the thermal balance valve 23 includes a valve body 39, a valve core 37 is arranged in the valve body 39, the left side of the valve core 37 is a high-temperature chamber 38, the right side of the valve core 37 is a low-temperature chamber 36, the valve core 37 is connected to the thermistor push rod 34 through the adjusting rod 33, and the thermistor element 35 is installed at the rear of the thermistor push rod.

[0040] In detail, the high temperature chamber 38 is connected to the steam box 25, and the low temperature chamber 36 is connected to the preheating box 20. The valve body 39 and the valve core 37 are made of stainless steel or brass.

[0041] The function of the thermal balance valve 23 is to balance the temperature difference on both sides of the valve body 39. When the temperature of the low-temperature chamber 36 is detected by the thermistor 35, the thermistor push rod 34 is extended when the temperature reaches the set temperature. The adjusting rod 33 moves accordingly, pushing the valve core 37 to open, and the water in the preheating box 20 is continuously replenished to the steam box 25. When the thermistor 35 detects that the temperature of the low-temperature chamber 36 is low, the valve core 37 is driven to close to prevent the low-temperature water from flowing into the steam box 25, so as to avoid causing the hot water to stop boiling and the steam to stop. This action process is continuously circulated. The thermistor 35 is made of one of bimetal, expansion solid, and expansion liquid. The fixed angle of the adjusting rod 33 and the thermistor push rod 34 can be adjusted to set the thermal balance temperature between 85°C and 99.9°C. Without considering energy consumption, the closer the temperature of the preheating box 20 is to the boiling point, the more stable the steam in the steam box 25 is.

[0042] In at least one embodiment, a control cabinet 2 is installed on the base 1, and the control cabinet 2 is connected to the liquid level sensor 7, the first temperature sensor 8, the pressure sensor 9, the second temperature sensor 10, the humidity sensor 13, and the third temperature sensor 18 through signal cables. The control cabinet 2 is connected to the hot water heating pipe 19, the steam heating pipe 26, and the fan 3 through control cables. The control cabinet 2 is provided with a display screen, operation buttons, a program controller, a power regulator, and a frequency converter. The control cabinet 2 has display, control, and data storage functions.

[0043] The working principle and use process of the present invention:

[0044] The purified water from the pipeline is added to the preheating tank 20 through the water inlet valve 17 and the float valve 16. When the liquid level rises to the upper limit, the float valve 16 closes the water inlet due to buoyancy, and the water inlet valve 17 remains normally open. Start the control cabinet 2, the hot water heating pipe 19 is powered on for heating, and the preheating temperature is kept constant after reaching the set preheating temperature of 96°C. When the temperature reaches the set temperature of the heat balance valve 23 (85°C to 99.9°C can be set), the hot water in the preheating tank 20 enters the steam tank 25 through the heat balance valve 23. At this time, the liquid level of the preheating tank 20 drops, the float valve 16 is opened to continuously replenish water, and the hot water heating pipe 19 continues to heat. When the liquid level sensor 7 detects the upper limit of the liquid level of the steam tank 25, the steam heating pipe 26 is powered on for heating until the water boils, and steam begins to be generated. The pressure sensor 9 performs the steam pressure detection and overpressure protection functions.

[0045] Further explanation of the function of the heat balance valve 23, when the water temperature in the preheating box 20 does not reach the opening temperature set by the heat balance valve 23, the heat balance valve 23 is closed, and the water replenishment into the steam box 25 is stopped. Sufficient capacity is set in the steam box 25 to ensure continuous generation of steam. When the water temperature in the preheating box 20 reaches the set value, the heat balance valve 23 is opened, and the water level of the steam box 25 is continuously replenished to the upper limit. This process continues in a cycle.

[0046] At the same time, steam enters the air supply box 6 through the steam hose, and the fan 3 is turned on at the same time, and the outdoor air is extracted and sent to the use point through the flow equalizer 14 after being kept constant temperature by the heat exchanger 4 and humidified by the steam nozzle 5. During the process, the humidity sensor 13 detects the humidity of the supply air in real time, and the signal is transmitted to the control cabinet 2. The control cabinet 2 uses the negative feedback control principle according to the set required humidity of 30% RH to dynamically control the output power of the steam heating tube 26, so that the humidity of the supply air is stabilized at the required value, and the humidity can be controlled at 30% ± 1.0% RH. At the same time, the temperature sensor 10 detects the temperature of the supply air in real time, and the signal is transmitted to the control cabinet 2. The control cabinet 2 dynamically controls the heat exchanger 4 according to the set required temperature of 25°C, so that the temperature of the supply air is stabilized at the required value, and the temperature can be controlled at 25±0.5°C.

[0047] Further explanation of the function of the heat exchanger 4: when the outdoor air temperature is high, the heat exchanger 4 switches to the cooling mode to cool and dehumidify the air. When the outdoor air temperature is low, the heat exchanger 4 switches to the heating mode to heat the air and stabilize the supply air temperature at the required value.

[0048] Finally, the air index output by the air supply box 6 can achieve humidity adjustment between 10%RH and 80%, with a humidity accuracy of ±1.0%RH, and temperature adjustment between 15℃ and 30℃ with a temperature accuracy of ±0.5℃, thus realizing an industrial air constant temperature and humidity device.

[0049] Example 2

[0050] The industrial air constant temperature and humidity device in Example 2 is different from that in Example 1 in that the air power source is different.

[0051] In Example 1, the fan 3 of the air box 6 is a centrifugal fan. The temperature and humidity of the extracted outdoor air changes with the climate, especially in winter and summer. The air temperature and humidity change greatly, which increases the difficulty of the subsequent constant temperature and humidity treatment. In view of this situation, this embodiment uses pipeline compressed air commonly used in industrial sites as the air power source. The compressed air is generated by a special compressor equipment, and the temperature and humidity are basically stable, which can minimize the environmental impact and further improve the stability.

[0052] Specific implementation method Figure 6 As shown, the air source connector 40 is connected to the pressure regulating valve 41 through a pipeline, the pressure regulating valve 41 is connected to the flow regulating valve 42 through a pipeline, the flow regulating valve 42 is connected to the diffusion chamber 43 through a pipeline, and the diffusion chamber 43 is connected to the left side of the air supply box 6 through a flange. To ensure clean air, the pipeline material is 304 stainless steel.

[0053] In the working process of this example, steam is generated in the same way as in Example 1, and the steam enters the air supply box 6 through the steam hose 11. At the same time, the compressed air is connected through the air source connector 40, and the pressure is adjusted to 1200Pa by the pressure regulating valve 41, and the flow regulating valve 42 is adjusted to 5000m3 / h. The stabilized air enters the air supply box 6 at a uniform speed through the diffusion chamber 43, and is sent to the use point through the flow plate 14 after being kept constant temperature by the heat exchanger 4 and humidified and mixed by the steam nozzle 5. During the process, the humidity sensor 13 detects the humidity of the air supply in real time, and the signal is transmitted to the control cabinet 2. The control cabinet 2 uses the negative feedback control principle according to the set required humidity of 40%RH to dynamically control the output power of the steam heating tube 26, so that the humidity of the air supply is stable at the required value, and the humidity can be controlled at 40%±0.5%RH. At the same time, the temperature sensor 10 detects the supply air temperature in real time, and the signal is transmitted to the control cabinet 2. The control cabinet 2 dynamically controls the heat exchanger 4 according to the set required temperature of 25°C, so that the supply air temperature is stabilized at the required value. The temperature can be controlled at 25±0.2°C.

[0054] Finally, the air index output by the air supply box 6 can achieve humidity adjustment at 10% RH ~ 80%, humidity accuracy ± 0.5% RH, and temperature can be adjusted at 15 ° C ~ 30 ° C, temperature accuracy ± 0.2 ° C, which is further improved than the constant temperature and humidity stability of embodiment 1.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An industrial air constant temperature and humidity device, characterized in that: It comprises a base, on which a preheating box and a steam box are fixedly connected, the preheating box is connected to the steam box through a heat balance valve, the steam box is connected to the air supply box through a steam hose, the air supply box is connected to the preheating box through a condensation hose, and the outer surfaces of the preheating box, the steam box and the air supply box are integrally covered with a thermal insulation layer; The thermal balance valve comprises a valve body, a valve core is arranged in the valve body, the left side of the valve core is a high temperature chamber, the right side of the valve core is a low temperature chamber, the valve core is connected to a thermal push rod through an adjusting rod, a thermal element is installed at the rear of the thermal push rod, the high temperature chamber is connected to a steam box, and the low temperature chamber is connected to a preheating box; A pressure sensor is installed on the upper part of the steam box, a liquid level sensor and a first temperature sensor are installed on the left side of the steam box, a steam heating pipe is installed inside the steam box, and a second drain valve is installed at the bottom of the steam box; An exhaust valve is installed on the upper part of the preheating box, a float valve is installed on the right side of the preheating box, the right side of the float valve is connected to the water inlet valve, a third temperature sensor is installed in the middle of the right side of the preheating box, a hot water heating pipe is installed inside the preheating box, and a first drain valve is installed at the bottom of the preheating box.

2. The industrial air constant temperature and humidity device according to claim 1, characterized in that: A fan is installed on the left side of the air supply box, a heat exchanger is installed on the left side inside the air supply box, a second temperature sensor is installed on the left side of the bottom of the air supply box, a steam nozzle is installed in the middle of the bottom of the air supply box, a humidity sensor is installed on the right side of the bottom of the air supply box, and a flow equalizing plate is installed on the right side of the air supply box.

3. The industrial air constant temperature and humidity device according to claim 2, characterized in that: The air supply box is made by bending a stainless steel plate, and the flow equalizing plate is a stainless steel woven mesh or a rectangular plate with through holes.

4. The industrial air constant temperature and humidity device according to claim 2, characterized in that: The steam nozzle comprises a nozzle shell, the left side of the nozzle shell is a steam inlet, which is connected to the steam box through a steam hose, a condensation reflux port is arranged on the left side of the bottom of the nozzle shell, a steam guide plate is arranged inside the nozzle shell, the steam nozzles are evenly arranged on the upper part of the nozzle shell, the upper part of the steam guide plate is a steam chamber, and the lower part is a condensation reflux chamber.

5. The industrial air constant temperature and humidity device according to claim 4, characterized in that: The steam guide plate is welded inside the nozzle shell to isolate the nozzle shell to form an upper steam chamber and a lower condensation reflux chamber. The right end of the steam guide plate is offset downward by 3 mm relative to the horizontal axis of the nozzle shell, and the condensation reflux port is connected to the preheating box through a condensation hose.

6. The industrial air constant temperature and humidity device according to claim 1, characterized in that: A control cabinet is installed on the base. The control cabinet is connected to the liquid level sensor, the first temperature sensor, the pressure sensor, the second temperature sensor, the humidity sensor, and the third temperature sensor through signal cables. The control cabinet is connected to the hot water heating pipe, the steam heating pipe, and the fan through control cables. The control cabinet is provided with a display screen, operation buttons, a program controller, a power regulator, and a frequency converter.

7. The industrial air constant temperature and humidity device according to claim 1, characterized in that: It also includes an air source connector, which is connected to a pressure regulating valve through a pipeline, the pressure regulating valve is connected to a flow regulating valve through a pipeline, the flow regulating valve is connected to a diffusion chamber through a pipeline, and the diffusion chamber is connected to the left side of the air supply box through a flange.

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