節流閥的作用是啥？和調速閥的區別再弄錯了
What is the function of throttle valve? The difference between the valve and the speed control valve is wrong again
節流閥想必很多朋友都不知道是干啥的，節流閥主要是根據開口的大小來達到節流的目的，而且在這期間還會收到阻節的影響，導致節流前后會產生較大的壓力差。下面就跟小編一起來了解一下節流閥的作用以及合格調速閥的區別，希望大家喜歡。
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.
節流閥和調速閥的區別
Differences between throttle valve and governor valve
1、節流閥
1. Throttle valve
是調節和控制閥內開口的大小直接限制流體通過的流量達到節流的目的。由于是強制受阻節流，所以節流前后會產生較大的壓力差，受控流體的壓力損失比較大，也就是說節流后的壓力會減小。
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、調速閥
2. Governor valve
是在節流閥節流原理的基礎上，又在閥門內部結構上增設了一套壓力補償裝置，改善的節流后壓力損失大的現象，使節流后流體的壓力基本上等同于節流前的壓力，并且減少流體的發熱。 調速閥一般分二通調速閥和三通調速閥，二通調速閥是由一個定差減壓閥和一個節流閥串聯組成，三通調速閥是由一個定差溢流閥和一個節流閥并聯組成，但它們都有一個共同的特性：即保持節流閥進、出油口的壓差基本恒定，這樣通過節流閥的流量只和閥口開度A有關，與負載壓力波動無關。
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.
節流閥的作用
Function of throttle valve
1、節流降壓。當常溫高壓的制冷劑飽和液體流過節流閥，變成低溫低壓的制冷劑液體并產生少許閃發氣體。進而實現向外界吸熱的目的。
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、調節流量：節流閥通過感溫包感受蒸發器出口處制冷劑過熱度的變化來控制閥的開度，調節進入蒸發器的制冷劑流量，使其流量與蒸發器的熱負荷相匹配。當蒸發器熱負荷增加時閥開度也變大，制冷劑流量隨之增加，反之，制冷劑流量減少。
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、控制過熱度：節流機構具有控制蒸發器出口制冷劑過熱度的功能，既保持蒸發器傳熱面積的充分利用，又防止吸氣帶液損壞壓縮機的事故發生。
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、控制蒸發液位：帶液位控制的節流機構具有控制蒸發器液位的功能，既保持蒸發器傳熱面積的充分利用，又防止吸氣帶液降低吸氣過熱度。
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 http://www.szgotta.com.cn
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