节流阀的作用是啥？和调速阀的区别再弄错了
What is the function of throttle valve? The difference between the valve and the speed control valve is wrong again
节流阀想必很多朋友都不知道是干啥的，节流阀主要是根据开口的大小来达到节流的目的，而且在这期间还会收到阻节的影响，导致节流前后会产生较大的压力差。下面就跟小编一起来了解一下节流阀的作用以及合格调速阀的区别，希望大家喜欢。
Many friends may not know what the throttle valve is for. The throttle valve is mainly used for throttling according to the size of the opening, and it will also be affected by throttling during this period, resulting in a large pressure difference before and after throttling. Now let's learn about the function of throttle valve and the difference between qualified speed control valves with Xiaobian. I hope you like it.
节流阀和调速阀的区别
Differences between throttle valve and governor valve
1、节流阀
1. Throttle valve
是调节和控制阀内开口的大小直接限制流体通过的流量达到节流的目的。由于是强制受阻节流，所以节流前后会产生较大的压力差，受控流体的压力损失比较大，也就是说节流后的压力会减小。
It is used to regulate and control the size of the opening in the valve to directly limit the flow of fluid to achieve the purpose of throttling. Due to the forced throttling, there will be a large pressure difference before and after throttling, and the pressure loss of the controlled fluid is relatively large, that is, the pressure after throttling will decrease.
2、调速阀
2. Governor valve
是在节流阀节流原理的基础上，又在阀门内部结构上增设了一套压力补偿装置，改善的节流后压力损失大的现象，使节流后流体的压力基本上等同于节流前的压力，并且减少流体的发热。 调速阀一般分二通调速阀和三通调速阀，二通调速阀是由一个定差减压阀和一个节流阀串联组成，三通调速阀是由一个定差溢流阀和一个节流阀并联组成，但它们都有一个共同的特性：即保持节流阀进、出油口的压差基本恒定，这样通过节流阀的流量只和阀口开度A有关，与负载压力波动无关。
On the basis of the throttling principle of the throttle valve, a set of pressure compensation device is added to the internal structure of the valve to improve the phenomenon of large pressure loss after throttling, so that the pressure of the fluid after throttling is basically equal to the pressure before throttling, and reduce the heating of the fluid. The speed regulating valve is generally divided into two-way speed regulating valve and three-way speed regulating valve. The two-way speed regulating valve is composed of a constant differential pressure reducing valve and a throttle valve in series, while the three-way speed regulating valve is composed of a constant differential relief valve and a throttle valve in parallel, but they all have a common feature: that is, the pressure difference between the inlet and outlet of the throttle valve is basically constant, so the flow through the throttle valve is only related to the opening A of the valve port, and has nothing to do with the load pressure fluctuation.
节流阀的作用
Function of throttle valve
1、节流降压。当常温高压的制冷剂饱和液体流过节流阀，变成低温低压的制冷剂液体并产生少许闪发气体。进而实现向外界吸热的目的。
1. Throttling and depressurization. When the refrigerant saturated liquid with normal temperature and high pressure flows through the throttle valve, it becomes the refrigerant liquid with low temperature and pressure and generates a little flash gas. And then realize the purpose of absorbing heat to the outside world.
2、调节流量：节流阀通过感温包感受蒸发器出口处制冷剂过热度的变化来控制阀的开度，调节进入蒸发器的制冷剂流量，使其流量与蒸发器的热负荷相匹配。当蒸发器热负荷增加时阀开度也变大，制冷剂流量随之增加，反之，制冷剂流量减少。
2. Adjust the flow: the throttle valve controls the opening of the valve by sensing the change of the refrigerant superheat at the evaporator outlet through the temperature sensor, and regulates the refrigerant flow into the evaporator to match its flow with the heat load of the evaporator. When the heat load of the evaporator increases, the valve opening becomes larger, and the refrigerant flow increases accordingly. On the contrary, the refrigerant flow decreases.
3、控制过热度：节流机构具有控制蒸发器出口制冷剂过热度的功能，既保持蒸发器传热面积的充分利用，又防止吸气带液损坏压缩机的事故发生。
3. Control of superheat: The throttling mechanism has the function of controlling the superheat of refrigerant at the outlet of evaporator, which not only keeps the full use of the heat transfer area of evaporator, but also prevents the compressor from being damaged by the suction liquid.
4、控制蒸发液位：带液位控制的节流机构具有控制蒸发器液位的功能，既保持蒸发器传热面积的充分利用，又防止吸气带液降低吸气过热度。
4. Control of evaporation liquid level: the throttling mechanism with liquid level control has the function of controlling the evaporator liquid level, which not only keeps the full use of the evaporator heat transfer area, but also prevents the suction from carrying liquid to reduce the suction superheat.
The above is a detailed introduction to Shanghai Lianggong Valve, and I hope it will be helpful to you. If you have any questions, please contact us. We will provide you with professional services //www.rabieb.com
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