空压机，压缩机其实并不是一回事
Air compressor, compressor is not the same thing
空压机和压缩机实际上是两种不同的机械产品；
Air compressor and compressor are actually two different mechanical products;
工艺压缩机能够压缩多种气体介质，比如氢气、氮气、氯气、氧气等，用在空分行业来制氮制氧等。空压机主要是压缩空气，在除了化工的诸多行业都会用到空压机；
The process compressor can compress a variety of gas media, such as hydrogen, nitrogen, chlorine, oxygen, etc., and is used in the air separation industry to produce nitrogen and oxygen, etc. Air compressor is mainly compressed air, in addition to many chemical industries will use air compressor;
空压机做空压机的企业很多，但是做工艺压缩机的企业并不多。工艺压缩机的企业一般都能够生产不同压缩工艺的机组。
There are many enterprises of air compressor, but not many enterprises of process compressor. Process compressor enterprises are generally able to produce units with different compression processes.
两者概念区别
Difference between the two concepts
空压机就是空气压缩机。主要是用来压缩空气的机械产品，在很多地方都会用到。比如空压机的一个最常用的功能是能够将空气进行压缩从而用作动力，在电力行业运用比较广泛。除此之外还可以用来制冷和分离气体，输送气体等等作用。在生活和工作中发挥着非常重要的作用。
An air compressor is an air compressor. Mainly used for compressed air mechanical products, in many places will be used. For example, one of the most commonly used functions of air compressor is to compress air for power, which is widely used in the power industry. In addition, it can also be used to cool and separate gas, transport gas and so on. It plays a very important role in life and work.
而压缩机则是总称。且压缩机有很多种类，如冷媒压缩机、氢气压缩机和空气压缩机等等。空气压缩机只是压缩机中的一种，它的压缩媒介是空气，而压缩机可以用来压缩很多东西，不仅仅是空气。因此，空压机和压缩机的区分，就像是中国人和人类一样。中国人是包含在人类这个范畴中的，空气压缩机被包含在压缩机这个总概念中，是压缩机中的一种。
Compressor is the general term. And there are many kinds of compressors, such as refrigerant compressor, hydrogen compressor and air compressor and so on. Air compressor is only one kind of compressor, its compression medium is air, and compressor can be used to compress many things, not only air. Therefore, the distinction between air compressor and compressor is just like that between Chinese and human. Chinese people are included in the category of human beings. Air compressor is included in the general concept of compressor, which is a kind of compressor.
一般人都会认为气泵就是空压机。但是气泵在很久前所说的是活塞式空压机， 现在空压机种类比较多，螺杆机，无油机，节能变频空压机等等。气泵和空压机的原理还是有差别的。
Most people think that air pump is air compressor. But the air pump said a long time ago is the piston type air compressor, now there are many kinds of air compressor, screw machine, oil-free machine, energy-saving variable frequency air compressor and so on. The principle of air pump and air compressor is different.
两者原理
The two principles
空压机的工作原理：
Working principle of air compressor:
我们以螺杆空压机为例，螺杆压缩机的工作循环可分为进气（1），压缩（2、3）和排气（4）三个过程。随着转子旋转，每对相互啮合的齿相继完成相同的工作循环。
Taking screw air compressor as an example, the working cycle of screw compressor can be divided into three processes: intake (1), compression (2, 3) and exhaust (4). As the rotor rotates, each pair of meshing teeth successively complete the same working cycle.
1． 进气过程：转子转动时，阴阳转子的齿沟空间在转至进气端壁开口时，其空间最大，此时转子齿沟空间与进气口的相通，因在排气时齿沟的气体被完全排出，排气完成时，齿沟处于真空状态，当转至进气口时，外界气体即被吸入，沿轴向进入阴阳转子的齿沟内。当气体充满了整个齿沟时，转子进气侧端面转离机壳进气口，在齿沟的气体即被封闭。
1. Air intake process: when the rotor rotates, the space of the tooth groove of the male and female rotors is the largest when it turns to the opening of the air intake end wall. At this time, the space of the tooth groove of the rotor is connected with the air inlet. Because the gas in the tooth groove is completely discharged when the exhaust is completed, the tooth groove is in a vacuum state. When it turns to the air inlet, the external gas is sucked in and enters the tooth groove of the male and female rotors along the axial direction 。 When the gas is full of the entire groove, the end face of the rotor inlet side turns away from the air inlet of the casing, and the gas in the groove is closed.
2、3． 压缩过程：阴阳转子在吸气结束时，其阴阳转子齿尖会与机壳封闭，此时气体在齿沟内不再外流。其啮合面逐渐向排气端移动。啮合面与排气口之间的齿沟空间渐渐件小，齿沟内的气体被压缩压力提高。
2. 3. Compression process: when the suction of the male and female rotors is finished, the tooth tips of the male and female rotors will be closed with the casing, and at this time, the gas will not flow out in the groove. The meshing surface gradually moves to the exhaust end. The groove space between the meshing surface and the exhaust port is gradually small, and the gas in the groove is compressed to increase the pressure.
3． 排气过程：当转子的啮合端面转到与机壳排气口相通时，被压缩的气体开始排出，直至齿尖与齿沟的啮合面移至排气端面，此时阴阳转子的啮合面与机壳排气口的齿沟空间为0，即完成排气过程，在此同时转子的啮合面与机壳进气口之间的齿沟长度又达到最长，进气过程又再进行。
3. Exhaust process: when the meshing end face of the rotor turns to be connected with the exhaust port of the casing, the compressed gas starts to exhaust until the meshing surface of the tooth tip and the tooth groove moves to the exhaust end face. At this time, the space between the meshing surface of the male and female rotors and the tooth groove of the exhaust port of the casing is 0, that is to say, the exhaust process is completed. At the same time, the length of the tooth groove between the meshing surface of the rotor and the air inlet of the casing reaches the maximum, The intake process is repeated.
工艺压缩机的工作原理：
Working principle of process compressor:
我们以常见的离心式压缩机为例，汽轮机(或电动机)带动压缩机主轴叶轮转动，在离心力作用下，气体被甩到工作轮后面的扩压器中去。而在工作轮中间形成稀薄地带，前面的气体从工作轮中间的进汽部份进入叶轮，由于工作轮不断旋转，气体能连续不断地被甩出去，从而保持了气压机中气体的连续流动。气体因离心作用增加了压力，还可以很大的速度离开工作轮，气体经扩压器逐渐降低了速度，动能转变为静压能，进一步增加了压力。如果一个工作叶轮得到的压力还不够，可通过使多级叶轮串联起来工作的办法来达到对出口压力的要求。级间的串联通过弯通，回流器来实现。这就是离心式压缩机的工作原理。
We take the common centrifugal compressor as an example. The turbine (or motor) drives the main shaft impeller of the compressor to rotate. Under the centrifugal force, the gas is thrown into the diffuser behind the working wheel. A thin zone is formed in the middle of the working wheel, and the gas in front enters the impeller from the steam inlet part in the middle of the working wheel. As the working wheel rotates continuously, the gas can be continuously thrown out, thus maintaining the continuous flow of gas in the air compressor. The pressure of gas is increased by centrifugal action, and the gas can leave the working wheel at a great speed. The speed of gas is gradually reduced by the diffuser, and the kinetic energy is converted into static pressure energy, which further increases the pressure. If the pressure of a working impeller is not enough, the outlet pressure can be achieved by connecting the multi-stage impellers in series. The series connection between stages is realized by bending and reflux. This is the working principle of centrifugal compressor.