Method for preventing formation suction nozzle from being blocked and formation suction nozzle
By alternating the positive pressure flow through the negative pressure channel and positive pressure channel of the formation nozzle after the formation process, the problem of nozzle blockage is solved, production efficiency is improved, and the service life of the formation nozzle is extended.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEFEI GUOXUAN HIGH TECH POWER ENERGY
- Filing Date
- 2026-02-26
- Publication Date
- 2026-05-19
AI Technical Summary
The formation nozzle is prone to clogging during the formation process. Cleaning the formation nozzle will increase the formation waiting time, affecting production efficiency and wasting manpower.
By alternating positive pressure in the negative and positive pressure channels of the formation nozzle after formation, the residual electrolyte on the surface of the formation nozzle is removed by alternating positive pressure, which avoids rapid coagulation of the electrolyte and extends the service life of the formation nozzle.
It effectively prevents chemical formation nozzle clogging, improves production efficiency, reduces costs, and extends the service life of chemical formation nozzles.
Smart Images
Figure CN122057749A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of lithium-ion battery technology, specifically relating to a method for preventing formation nozzle clogging and a formation nozzle. Background Technology
[0002] With the development of the new energy industry, lithium-ion batteries have become the main power source for the new energy vehicle industry due to their advantages such as high energy density, low price, and rechargeability. In the manufacturing process of lithium-ion batteries, formation is a key process. During the formation process, different charging currents at different rates, combined with stepped formation negative voltages, can ensure the stable formation of the SEI film in the battery and sufficient gas production.
[0003] As a crucial component of formation equipment, the formation nozzle receives significant attention in the industry, with its design being a primary focus, while its lifespan is often overlooked. Currently, most formation nozzles are made of EPDM rubber, which is susceptible to corrosion by electrolyte during prolonged use at high temperatures. Failure to clean them promptly can lead to formation failure and battery degradation. The industry standard for cleaning formation nozzles is to shut down the machine for cleaning, replacing severely damaged nozzles. However, this method impacts production line efficiency and wastes considerable manpower and time. Furthermore, during production, the negative pressure environment required to expel gases from the battery during formation introduces some electrolyte into the formation nozzle. When some formation bays experience prolonged waiting periods, the residual electrolyte in the nozzles can quickly solidify, causing blockages during subsequent formation processes. The conventional solution in this case is to disassemble and clean the formation nozzles, severely hindering production efficiency.
[0004] In summary, the current battery formation stage has technical problems such as the formation nozzle being prone to clogging during the formation process, and cleaning the formation nozzle leading to increased formation waiting time. Summary of the Invention
[0005] The present invention aims to solve the problem of clogging of existing chemical formation nozzles during the chemical formation process.
[0006] The present invention solves the above-mentioned technical problems through the following technical means:
[0007] A method for preventing clogging of the formation nozzle includes: after the battery formation is completed and the battery is removed, the negative pressure channel and the positive pressure channel of the formation nozzle are alternately supplied with positive pressure.
[0008] The method of this application, for formation storage locations where formation has ended or where battery formation has not been carried out for a long time, utilizes the characteristic that the viscosity of electrolyte increases with time at high temperatures. It designs an alternating positive pressure to remove residual electrolyte from the surface of the formation nozzle, preventing the electrolyte on the formation nozzle from quickly condensing. This avoids the waste of manpower and time in cleaning and replacing the nozzle, extends the service life of the formation nozzle, improves production efficiency, and reduces costs.
[0009] Preferably, the step of alternating positive pressure through the negative pressure channel and positive pressure channel of the formation nozzle includes multiple rounds of alternating positive pressure, each round of alternating positive pressure includes several sets of alternating positive pressure sub-cycles, and a preset time interval is between each two adjacent rounds of alternating positive pressure.
[0010] Preferably, after the first round of alternating positive pressure application process is completed, it is determined whether the formation shutdown has exceeded a first preset time. If the pressure exceeds the limit, the second round of alternating positive pressure application will begin; if the pressure does not exceed the limit, the next batch of battery formation will continue.
[0011] Preferably, after the second round of alternating positive pressure is completed, it is determined whether the formation shutdown has exceeded the second preset time. If the pressure exceeds the limit, an alarm will be issued or the third round of alternating positive pressure will be initiated. If the pressure does not exceed the limit, the next batch of battery formation will continue. The subsequent rounds of alternating positive pressure are consistent with the steps of the second round of alternating positive pressure.
[0012] Preferably, during each round of alternating positive pressure, several sets of alternating positive pressure sub-cycles are performed with different parameters, and the pressure of the next round of positive pressure is greater than that of the previous round.
[0013] Preferably, the parameters for each round of alternating positive pressure are different, but the process is the same. Taking the first round as an example, during the first round of alternating positive pressure, several sets of alternating positive pressure sub-cycles are performed with the first parameter. The first parameter specifically includes the following steps: ① After the negative pressure channel is opened to positive pressure, the positive pressure is maintained. The duration is ② After positive pressure is introduced into the positive pressure channel, the positive pressure is maintained. The duration is After steps ① to ② are repeated a preset number of times, all access points are closed, and every [number] cycles... Continue the above cycle until the next transformation occurs or the first preset time is reached. Stop at time, and .
[0014] The alternating positive pressure can blow away the electrolyte at the formation nozzle and prevent crystallization at the formation nozzle. The specific parameters are related to the formation temperature and the type of electrolyte, with the standard being that the electrolyte does not crystallize at the formation nozzle.
[0015] Preferably, for the formation storage location in normal production, the time interval between the unloading of the previous batch of batteries and the loading of the next batch of batteries does not reach [the specified value]. The time is used to cycle through steps ① to ② of the first parameter a preset number of times. Limitations should be made based on actual production conditions.
[0016] Preferably, in the step of removing the battery after formation is completed and before the negative pressure channel and positive pressure channel of the formation nozzle are alternately supplied with positive pressure, the method further includes: placing the battery in a formation cabinet, connecting the negative pressure nozzle to the battery injection nozzle; closing the positive pressure channel, opening the negative pressure channel, and starting the battery formation.
[0017] Preferably, the method further includes a chemical formation nozzle device for preventing clogging of the chemical formation nozzle, the chemical formation nozzle device including a negative pressure channel port and a positive pressure channel port, the positive pressure channel port including a plurality of ports, uniformly surrounding the outer periphery of the negative pressure channel port.
[0018] Preferably, the positive pressure channel is connected to an external compressor via a positive pressure pipe, and the positive pressure pipe is made of a transparent material.
[0019] The advantages of this invention are: (1) Compared with conventional formation nozzles, the negative pressure channel port of this application can not only provide normal negative pressure function during the formation process, but also has the ability to switch to positive pressure. After the formation is completed, the electrolyte at the formation nozzle can be blown away from the formation nozzle by switching to positive pressure. (2) The formation nozzle device of this application is designed with multiple positive pressure ports around the negative pressure channel to ensure that the electrolyte can be thoroughly cleaned during positive pressure cleaning, so that the electrolyte on the formation nozzle will not coagulate quickly. (3) The method of this application is designed to clean the residual electrolyte stuck on the formation nozzle by alternating positive pressure, which avoids the waste of manpower and time in cleaning and replacing the nozzle, and extends the service life of the formation nozzle, improving production efficiency while reducing costs. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the chemical formation nozzle structure according to the first embodiment of the present invention; Figure 2 This is a schematic diagram showing the connection between the formation nozzle and the battery in the first embodiment of the present invention; Figure 3 This is a flowchart of the method for preventing chemical vapor injection nozzle clogging according to the first embodiment of the present invention; Figure 4 This is a graph showing the viscosity change of the electrolyte over time in the second embodiment of the present invention.
[0021] Numbering on the map: 1. Transform into the main body of the suction nozzle; 2. Negative pressure channel opening; 3. Positive pressure channel entrance; 4. Positive pressure pipeline; 5. Negative pressure pipeline; 6. Battery 7. Turn into a cup sleeve. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] Example 1: Combination Figure 1 and Figure 2 As shown, this embodiment provides a chemical formation nozzle device, including a chemical formation nozzle body 1, a negative pressure channel port 2, and a positive pressure channel port 3.
[0024] See Figure 1 The formation nozzle body 1 is a hollow cylindrical component. One end face of the formation nozzle body 1 is provided with a negative pressure channel port 2 and a positive pressure channel port 3, and the other end face matches the electrolyte injection port of the battery 6 for injecting electrolyte into the battery. The negative pressure channel port 2 is located at the center of the end face of the formation nozzle body 1 and is circular. The positive pressure channel port 3 includes multiple ports (three in this embodiment, but other numbers are also possible) that are evenly distributed around the outer periphery of the negative pressure channel port 2 and are circular or elliptical.
[0025] See Figure 1 and Figure 2 The negative pressure channel 2 is connected to the formation cup 7 via the negative pressure pipe 5; the positive pressure channel 3 is connected to the external compressor via the positive pressure pipe 4. The positive pressure pipe 4 is made of transparent and corrosion-resistant glass to ensure that any crystallization caused by electrolyte seepage due to long-term use can be detected in a timely manner. The other end of the formation nozzle body 1 is fitted with the liquid injection hole of the battery 6.
[0026] See Figure 3 This embodiment uses a specific battery formation as an example to introduce a method for preventing clogging of the formation nozzle device of this application. In this embodiment, the battery cell to be formed is a square battery with an injection hole diameter of 7.8 mm. The negative pressure channel of the formation nozzle has a diameter of 12 mm, the positive pressure channel has a diameter of 5 mm, and there are three channels. The electrolyte is Xinzhoubang PV02 type. (See also...) Figure 4 When the formation temperature is set at 45°C, the viscosity of the electrolyte exposed to the air increases over time. The internal components decompose and deteriorate, causing the viscosity to gradually increase. After 6 hours, the electrolyte viscosity increases more rapidly, and the electrolyte remaining on the formation nozzle crystallizes faster. Therefore, when forming without a battery, the formation equipment needs to use alternating positive pressure to prevent the electrolyte on the formation nozzle from crystallizing.
[0027] The specific steps include: S1. The battery is placed in the formation cabinet, and the formation nozzle is connected to the liquid injection hole. The specific process is as follows: the battery 6 is fixed in the corresponding position in the formation cabinet, and the assembled formation nozzle device is aligned with the liquid injection hole and connected.
[0028] S2. The positive pressure channel is closed and the negative pressure channel is opened, and the battery begins to form. The specific process is as follows: the positive pressure channel port 3 is completely closed, the negative pressure channel port 2 is opened, and a negative pressure environment is formed. The negative pressure range varies according to the actual forming object and the viscosity of the electrolyte, based on meeting the formation liquid loss standard and the cell formation film effect. Electrolyte is then injected into the battery 6, and the battery begins to form.
[0029] S3. Formation complete, battery removed, positive pressure channel opened, negative pressure channel switched to positive pressure simultaneously, negative pressure channel and positive pressure channel alternately apply positive pressure according to the first parameter, the specific process is as follows: S3a. First, set the first cycle parameter: ① Open negative pressure channel 2 and close positive pressure channel 3. Negative pressure channel 2 is supplied with positive pressure, maintaining a pressure of 85 kPa. Under the electrolyte and formation temperature of this model, 80 kPa to 100 kPa is generally used according to experiments. This embodiment uses 85 kPa. In actual application, this pressure will vary depending on factors such as the electrolyte signal and formation temperature. It is recommended to calibrate in the laboratory. The duration is 4 seconds. Under the electrolyte and formation temperature of this model, 3 to 6 seconds is generally used according to experiments. This embodiment uses 4 seconds. In actual application, this time will vary depending on factors such as the electrolyte signal and formation temperature. It is recommended to calibrate in the laboratory. ② The positive pressure channel 3 is opened, and the negative pressure channel 2 is closed. The pressure at the positive pressure channel 3 is maintained at 120 kPa. Based on experiments, the pressure is generally 110 kPa to 150 kPa under the electrolyte and formation temperature of this model. This embodiment uses 120 kPa. In actual application, this pressure will vary depending on factors such as the electrolyte signal and formation temperature. Laboratory calibration is recommended. The duration is 4 seconds. Based on experiments, the duration is generally 3 seconds to 6 seconds under the electrolyte and formation temperature of this model. This embodiment uses 4 seconds. In actual application, this duration will vary depending on factors such as the electrolyte signal and formation temperature. Laboratory calibration is recommended. Processes ① and ② are used as the first parameters. S3b. After setting the first parameter, remove the formed battery 6. Close the negative pressure channel 2 and start applying positive pressure, operating with the first parameter, i.e., maintain the pressure at the negative pressure channel 2 at 85 kPa for 4 seconds, then stop applying positive pressure. At this time, all three positive pressure channels 3 start applying positive pressure simultaneously, maintaining the pressure at 120 kPa for 4 seconds, then stop applying positive pressure. This constitutes one cycle, repeated 5 times. In this embodiment, 5 cycles are selected based on experimental results. The actual number of cycles varies depending on factors such as the electrolyte signal and formation temperature. Laboratory calibration is recommended. Each set of five cycles constitutes one group of alternating positive pressure sub-cycles. After completing one group of alternating positive pressure sub-cycles, all channels are closed. S3c, thereafter continue the above alternating positive voltage cycle every 40 minutes; for this model of electrolyte and formation temperature, the time interval is generally 30~60 minutes according to experiments, and 40 minutes is used in this embodiment. In actual application, this time interval will vary with the electrolyte signal and formation temperature, etc., and laboratory calibration is recommended.
[0030] S4. Determine: Has the shutdown exceeded the first preset time? The specific process is as follows: During the alternating positive pressure cycle, it is simultaneously determined whether the formation shutdown exceeds 6 hours. Because the viscosity of the electrolyte used in this embodiment increases rapidly after 6 hours, 6 hours is used as the first preset time. The specific time can be adjusted after experimentation based on the selected electrolyte type and temperature. In this embodiment, the battery enters the formation cabinet after a 5-hour formation shutdown to continue formation. No negative pressure alarm occurs during the formation process. After the formation is completed, the electrolyte loss of all batteries is less than 5g, which meets the process requirements, indicating that the formation nozzle is not affected by electrolyte crystallization.
[0031] Example 2: The battery model, electrolyte, formation nozzle, positive and negative pressure channels, and formation temperature used in this embodiment are exactly the same as those in Embodiment 1.
[0032] like Figure 3 As shown, steps S1 to S3 are completely consistent with Example 1. The difference is that in step S4, the formation shutdown exceeds 6 hours. At this time, the viscosity of the electrolyte increases due to the shutdown time exceeding 6 hours. At this point, the second round of alternating positive pressure is initiated, as detailed below: S5, the negative pressure channel and the positive pressure channel alternately apply positive pressure according to the second parameter, the specific process is as follows: S5a. First, set the second parameter of the cycle: ① Open negative pressure channel 2, close positive pressure channel 3, and maintain positive pressure at negative pressure channel 2 at 160 kPa. Under the electrolyte and formation temperature of this model, experiments generally use 150 kPa to 200 kPa. This embodiment uses 160 kPa. In actual application, this pressure will vary depending on factors such as the electrolyte signal and formation temperature. Laboratory calibration is recommended. The duration is 6 seconds. Under the electrolyte and formation temperature of this model, experiments generally use 5 to 8 seconds. This embodiment uses 6 seconds. In actual application, this time will vary depending on factors such as the electrolyte signal and formation temperature. It is recommended that the laboratory calibrate the following: ② The positive pressure channel 3 is open, the negative pressure channel 2 is closed, and the pressure at the positive pressure channel 3 is maintained at 230 kPa. Under the electrolyte and formation temperature of this model, the pressure is generally 220 kPa to 250 kPa according to experiments. This embodiment uses 230 kPa. In actual application, this pressure will vary depending on factors such as the electrolyte signal and formation temperature. It is recommended that the laboratory calibrate the following: The duration is 8 seconds. Under the electrolyte and formation temperature of this model, the duration is generally 8 seconds to 10 seconds according to experiments. This embodiment uses 8 seconds. In actual application, this duration will vary depending on factors such as the electrolyte signal and formation temperature. It is recommended that the laboratory calibrate the following: S5b: After setting the second parameter, remove the formed battery 6. Close the negative pressure channel 2 and start applying positive pressure, operating with the first parameter. That is, maintain the pressure of the negative pressure channel 2 at 160 kPa for 6 seconds, then stop applying positive pressure. At this time, all three positive pressure channels 3 start applying positive pressure simultaneously, maintaining the pressure at 230 kPa for 8 seconds, then stop applying positive pressure. This is one cycle, repeated 3 times. In this embodiment, 3 cycles are selected based on experimental results. The actual number of cycles varies depending on factors such as the electrolyte signal and formation temperature. It is recommended to calibrate in the laboratory. Use 3 cycles as a set of alternating positive pressure sub-cycles. After completing one set of alternating positive pressure sub-cycles, close all channels. S5c, then continue the above alternating positive voltage cycle every 20 minutes. For this model of electrolyte and formation temperature, the time interval is generally 20~40 minutes according to experiments. This example uses 20 minutes. In actual application, this time interval will vary with the electrolyte signal and formation temperature, etc. It is recommended to calibrate it in the laboratory.
[0033] S6. Determine: Has the shutdown exceeded the second preset time? The specific process is as follows: During the alternating positive pressure cycle, it is simultaneously determined whether the formation shutdown exceeds 12 hours. Because the viscosity of the electrolyte used in this embodiment rises rapidly again after 12 hours, 12 hours is used as the second preset time. The specific time can be adjusted according to the selected electrolyte type and temperature. In this embodiment, after the formation shutdown is 10 hours, battery 6 enters the formation cabinet to continue formation. No negative pressure alarm occurs during the formation process. After the formation is completed, the electrolyte loss of all batteries is <5g, which meets the process requirements, indicating that the formation nozzle is not affected by electrolyte crystallization.
[0034] Example 3: The battery model, electrolyte, formation nozzle, positive and negative pressure channels, and formation temperature used in this embodiment are exactly the same as those in Embodiment 2.
[0035] like Figure 3 As shown, steps S1 to S5 are completely the same as in Example 2. The difference is that in step S6, the formation process is stopped for more than 12 hours. At this time, the viscosity of the electrolyte increases sharply due to the longer downtime. Simply alternating positive pressure is no longer sufficient to clean the formation nozzle. The details are as follows: S7. Equipment alarm: The specific process is as follows: When the equipment detects that the formation shutdown has exceeded 12 hours, the system defaults to the fact that relying solely on alternating positive and negative pressure channels is no longer sufficient to clean the electrolyte that is close to crystallization. Therefore, the equipment alarm is issued to remind the staff to replace or clean the formation nozzle.
[0036] Example 4: The battery model, electrolyte, formation nozzle, positive and negative pressure channels, and formation temperature used in this embodiment are exactly the same as those in Embodiment 1.
[0037] like Figure 3 As shown, steps S1 to S3 are completely consistent with Example 1. The difference is that in step S4, the formation shutdown is less than 30 minutes, that is, the time from the feeding of the previous batch of batteries to the feeding of the next batch of batteries is less than 30 minutes. In practical applications, this time should be calibrated according to the electrolyte signal and formation temperature. At this time, it is only necessary to use steps ① to ② in parameter 1 once to ensure that the formation nozzle does not crystallize.
[0038] Compared with traditional formation nozzles, the formation nozzle device of this application not only provides normal negative pressure during the formation process, but also has the ability to switch to positive pressure. After formation, it can switch to positive pressure to blow away the electrolyte from the formation nozzle. In addition, the formation nozzle device of this application is designed with multiple positive pressure channels 3 around the negative pressure channel 2 to ensure that the electrolyte is thoroughly cleaned during positive pressure cleaning, so that the electrolyte on the formation nozzle does not coagulate quickly. The method of preventing formation nozzle clogging in this application is designed to clean the residual electrolyte adhering to the formation nozzle with alternating positive pressure, which avoids the waste of manpower and time in cleaning and replacing the nozzle, and extends the service life of the formation nozzle, improving production efficiency and reducing costs.
[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Terms such as "upper," "lower," "left," "right," "front," and "rear" used in the invention are merely for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.
[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for preventing clogging of a chemical forming nozzle, characterized in that, include: After the battery formation process is completed and the battery is removed, the negative pressure channel and positive pressure channel of the formation nozzle alternately pass through positive pressure.
2. The method for preventing chemical formation nozzle clogging according to claim 1, characterized in that, The step of alternating positive pressure through the negative pressure channel and positive pressure channel of the formation nozzle includes multiple rounds of alternating positive pressure. Each round of alternating positive pressure includes several sets of alternating positive pressure sub-cycles, and a preset time interval is between each two adjacent rounds of alternating positive pressure.
3. The method for preventing clogging of the chemical formation nozzle according to claim 2, characterized in that, After the first round of alternating positive pressure application is completed, it is determined whether the formation shutdown has exceeded a first preset time. If the pressure exceeds the limit, the second round of alternating positive pressure application will begin; if the pressure does not exceed the limit, the next batch of battery formation will continue.
4. The method for preventing clogging of the chemical formation nozzle according to claim 3, characterized in that, After the second round of alternating positive pressure is completed, determine whether the formation shutdown has exceeded the second preset time. If the pressure exceeds the limit, an alarm will be issued or the third round of alternating positive pressure will be initiated. If the pressure does not exceed the limit, the next batch of battery formation will continue. The subsequent rounds of alternating positive pressure are consistent with the steps of the second round of alternating positive pressure.
5. A method for preventing clogging of a chemical forming nozzle according to claim 2, characterized in that, During each round of alternating positive pressure, several sets of alternating positive pressure sub-cycles are performed with different parameters, and the pressure of the next round of positive pressure is greater than that of the previous round.
6. A method for preventing clogging of a chemical forming nozzle according to claim 5, characterized in that, The parameters for each round of alternating positive pressure are different, but the process is the same. Taking the first round as an example, during the first round of alternating positive pressure, several sets of alternating positive pressure sub-cycles are performed using the first parameter. The first parameter specifically includes the following steps: ① After positive pressure is introduced into the negative pressure channel, the positive pressure is maintained. The duration is ② After positive pressure is introduced into the positive pressure channel, the positive pressure is maintained. The duration is After steps ① to ② are repeated a preset number of times, all access points are closed, and every [time period]... Continue the above cycle until the next transformation occurs or the first preset time is reached. Stop at time, and .
7. A method for preventing clogging of a chemical forming nozzle according to claim 6, characterized in that, For the formation storage area in normal production, the time interval between the loading of the previous batch of batteries and the loading of the next batch of batteries has not reached the required time. The time is used to cycle through steps ① to ② of the first parameter a preset number of times. Limitations should be made based on actual production conditions.
8. A method for preventing clogging of a chemical formation nozzle according to claim 1, characterized in that, In the step described above: after the battery formation is completed and removed, before the negative pressure channel and positive pressure channel of the formation nozzle alternately apply positive pressure, the process also includes: placing the battery in the formation cabinet, connecting the negative pressure nozzle to the battery injection nozzle; closing the positive pressure channel, opening the negative pressure channel, and starting the battery formation process.
9. A chemical forming nozzle apparatus employing the method for preventing clogging of a chemical forming nozzle according to any one of claims 1 to 8, characterized in that, The chemical formation nozzle device includes a negative pressure channel port and a positive pressure channel port. The positive pressure channel port includes multiple ports, which are evenly arranged around the outer periphery of the negative pressure channel port.
10. A chemical formation nozzle device according to claim 9, characterized in that, The positive pressure channel is connected to an external compressor via a positive pressure pipe, which is made of transparent material.