The air tube on the negative pressure hydro-dermabrasion device primarily serves to maintain and regulate the required negative pressure environment during operation. 

Maintaining the Negative Pressure Environment
The negative pressure hydro-dermabrasion device also called injector mesogun creates a negative pressure that lifts the skin, facilitating the injection of the hydro-dermabrasion solution into the deeper layers of the skin during the piercing process. The air tube, as a crucial component connecting the negative pressure source to the device, ensures the stable maintenance of the negative pressure environment. This negative pressure environment aids in better penetration of the solution into the skin's deeper layers, enhancing treatment efficacy.

Regulating Pressure Balance
During operation, the negative pressure hydro-dermabrasion device needs to continuously adjust the air pressure to maintain a stable negative pressure state. The air tube plays a role in regulating pressure balance, ensuring that the device can operate continuously and stably. Additionally, the air tube balances the internal pressure of the device with the external atmospheric pressure, preventing damage to the device due to pressure differences.

Draining and Aspirating Waste Fluids
During the hydro-dermabrasion treatment, the solution inevitably enters the negative pressure tube, mixed with trace bleeding from the facial area. The air tube also functions to drain and aspirate waste fluids, removing the solution and waste fluids from the device to avoid cross-infection or device clogging. This function is crucial for ensuring the safety and effectiveness of the treatment.

Ensuring Treatment Safety
Since the negative pressure hydro-dermabrasion device directly contacts the skin during treatment, hygiene and safety during the treatment process are paramount. The air tube, as an important component connecting the inside and outside of the device, must meet hygiene and safety standards in terms of material and design. By using high-quality air tubes, it can be ensured that the device does not cause infections or other safety issues due to air tube problems during treatment.

The automated hydro-derma gun represents an advanced device that marries modern technology with beauty and skincare concepts. It offers a more precise, efficient, and comfortable skincare experience through highly automated operations. 

Cycling Negative Pressure Technology: 
This technology stands as the core highlight of the device. By cyclically generating negative pressure, it gently and effectively lifts the skin, enabling the hollow micro-needles to precisely penetrate into specific skin layers. This design not only enhances treatment accuracy and depth control but also significantly reduces discomfort during treatment. Simultaneously, the cycling negative pressure design prevents skin damage, scarring, and pain that may arise from prolonged continuous negative pressure suction, ensuring the safety and comfort of the treatment.

Multi-Needle Design: The automated hydro-derma gun typically employs a nine-needle or multi-needle design, which significantly boosts treatment efficiency. Compared to traditional single-point or limited-point injections, the simultaneous operation of multiple needles achieves area-wide filling, ensuring a more even distribution of nutrients or medications across the treatment area, enhancing the overall treatment effect. Additionally, this multi-needle design shortens treatment time, allowing patients to resume their daily activities sooner.

Precise Injection: As the hollow micro-needles can precisely penetrate into specific skin layers, the automated hydro-derma gun ensures that nutrients or medications are accurately delivered to the targeted skin levels. This precision not only enhances treatment outcomes but also minimizes unnecessary waste and side effects.

Personalized Customization: Based on patients' skin conditions and needs, the automated hydro-derma gun can adjust parameters such as negative pressure intensity, injection depth, and dosage, enabling personalized treatment plans. This flexibility allows doctors to tailor treatments to each patient's unique situation, achieving optimal beauty results.

Comfortable Experience: Beyond the cycling negative pressure design, the automated hydro-derma gun prioritizes patients' treatment experience. The device often incorporates advanced pain management systems and cooling mechanisms to mitigate pain and discomfort during treatment. Furthermore, its user-friendly operation interface simplifies doctors' operations and monitoring.