DQB370-B2-1 air pump aging test

What is the difference between a small AC air pump and a small DC air pump?

First of all, from the working principle, the micro DC air pump uses a DC power supply, and its current direction remains unchanged during operation, which makes it have the advantages of fast start-up speed, low energy consumption, stable operation, and long life. The micro AC air pump uses an AC power supply, and its mechanical parts such as pistons or diaphragms will produce reciprocating motion due to the change of current direction during operation. This makes the AC air pump more stable at high pressure and large flow, but the energy efficiency is lower.

Secondly, in terms of usage scenarios, the small dc electric pump is mainly suitable for occasions requiring higher precision and smaller air volume due to its high precision, good stability, strong controllability and low noise, such as precision measurement, instrumentation, pneumatic fixtures and other fields. The micro AC air pump is more suitable for occasions with high flow and pressure requirements, such as compressed air delivery, packaging machinery, gas furnaces and other fields, due to its large output flow, wide range of applications, convenient control and long service life.

In addition, from the perspective of maintenance and cost, micro DC air pumps are usually designed to be maintenance-free, which reduces the user's maintenance cost and time. Micro AC air pumps may require regular maintenance to ensure their stable operation. In terms of price, the cost of the two may vary depending on the specific model, specifications and brand, but in general, the micro DC air pump may be slightly more expensive than the micro AC air pump due to its high precision and stability.

Finally, from an environmental perspective, the micro DC air pump is usually dry and oil-free, which means it will not contaminate the working medium or interfere with the analysis of the medium. The micro AC air pump may require the use of auxiliary materials such as lubricating oil, so it may be slightly inferior to the micro DC air pump in terms of environmental protection.

What are the pumps used in blood pressure monitors?

There are mainly the following types of pumps used in sphygmomanometers:

1. Mini air pump: This type of air pump is widely used in sphygmomanometers, mainly for inflating cuffs. It is characterized by small size, low power consumption and low noise, making it very suitable for home sphygmomanometers. The micro air pump is driven by a motor to compress and deliver air, providing the necessary pressure for blood pressure measurement.

2. Silent diaphragm pressurized air pump: This pump is specially designed to reduce noise during the inflation process and improve the user experience. It compresses and delivers gas through the reciprocating motion of the diaphragm, and takes noise reduction measures to make the inflation process quieter.

3. Oil-free silent air pump: This type of air pump does not require lubricating oil during operation, so it will not pollute the working medium or produce harmful gases. At the same time, its silent design makes the blood pressure measurement process more comfortable.

Technical Specification

How to choose the best pump for blood pressure measurement?

When choosing the most suitable pump for your blood pressure measurement, you should consider multiple factors. First, pay attention to the accuracy and stability of the dc pump. A high-precision pump can more accurately control the pressure in the cuff, thereby ensuring the accuracy of blood pressure measurement. A pump with good stability can maintain a constant pressure output throughout the measurement process, reducing measurement errors caused by pressure fluctuations.

Secondly, user experience is also an important factor to consider when choosing a pump. The noise, volume and power consumption of the pump will affect the user's experience. A silent pump can reduce noise interference during measurement and improve comfort; a small pump is more convenient to carry and use, suitable for people who need to go out or travel frequently; a low-power pump helps to extend the use time of the blood pressure monitor and reduce the trouble of frequent charging.

Dimension Drawing

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What role does the diaphragm play in a electric air pump?

In a mini electric air pump, the diaphragm is a key component, and its main function is to realize the pumping function through its reciprocating motion. Specifically, when the motor performs circular motion, it causes the diaphragm inside the pump to perform reciprocating motion through a mechanical device. This motion compresses and stretches the air in the fixed volume of the pump chamber, thereby forming a vacuum (negative pressure). A pressure difference is generated at the pump suction port and the external atmospheric pressure, and then under the action of the pressure difference, the gas is pressed (sucked) into the pump chamber and then discharged from the exhaust port.

Therefore, the diaphragm plays the role of pumping and compressing air in the portable electric air pump, and is the core component of the micro air pump to realize its function. In addition, the material and design of the diaphragm will also affect the performance of the micro air pump, such as air tightness, durability and noise.

Flow Performance

How do the motor and transmission mechanism of the small diaphragm air pump affect the accurate readings of the blood pressure monitor?

1. As the power source of the micro dc air pump, the performance of the motor directly affects the working efficiency and stability of the air pump. If the motor performance is unstable or fluctuates, it may cause uneven inflation speed of the air pump, thus affecting the accuracy of blood pressure measurement. Therefore, choosing a high-quality, stable performance 2. motor is essential to ensure the accurate reading of the sphygmomanometer.

The transmission mechanism is responsible for converting the rotational motion of the motor into the reciprocating motion of the air pump, thereby realizing the control of the pressure in the cuff. If the transmission mechanism is not designed reasonably or there are problems such as wear, it may cause inaccurate or unstable inflation pressure of the air pump, thereby affecting the results of blood pressure measurement. Therefore, optimizing the design of the transmission mechanism, reducing friction and wear, and improving transmission efficiency are also one of the key measures to improve the accurate reading of the sphygmomanometer.

3. The matching accuracy and stability of the motor and the transmission mechanism will also affect the accurate reading of the sphygmomanometer. If the matching is improper or there is a deviation, it may cause the air pump to deviate or fluctuate during the inflation process, thus affecting the accuracy of blood pressure measurement. Therefore, when designing and manufacturing a micro air pump, it is necessary to ensure the matching accuracy and stability between the motor and the transmission mechanism to reduce errors and deviations.