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    2. 濟南科邦機械設備有限公司您身邊的濟南空壓機廠家!
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      空壓機的熱力膨脹閥怎么選擇
      Time:2019-05-15 20:43:13       來源:http://www.592free.com/      

        熱力收縮閥的選擇和匹配在整個空壓機工作系統的性能中起著重要作用。正確選擇熱力收縮閥將最大限度天時用蒸發器,并使蒸發器一直與熱負荷相匹配。

        The selection and matching of thermal shrinkage valve plays an important role in the performance of the whole air compressor working system. Correct selection of thermal shrinkage valve will maximize the daily use of evaporator, and make the evaporator always match the heat load.
        熱力收縮閥與系統不匹配時的現象
        Phenomenon of mismatch between thermal shrinkage valve and system當發作不匹配時,系統的制冷劑流量將或多或少,這將招致熱收縮閥制冷才能忽大忽小的情況。
        When a mismatch occurs, the refrigerant flow rate of the system will be more or less, which will lead to the condition that the refrigeration capacity of the heat shrinkage valve will be neglected.
        1、當熱力收縮閥的開度太小時,將招致制冷劑供給缺乏,并且沒有足夠的制冷劑在蒸發器中蒸發,從而制冷劑以在蒸發器管中活動的方式蒸發。爾后,在蒸發器管道中沒有液態制冷劑蒸發,只要蒸汽過熱。因而,相當數量的蒸發器未能充沛發揮其效率,招致制冷才能缺乏,冷卻速度變慢,降低空調的冷卻效果,這將對系統性能產生負面影響。
        1. When the opening of the thermosystolic valve is too small, there will be a shortage of refrigerant supply, and there will not be enough refrigerant to evaporate in the evaporator, so that the refrigerant can evaporate in the way of moving in the evaporator tube. Thereafter, there is no liquid refrigerant evaporation in the evaporator pipeline as long as the steam is overheated. As a result, a considerable number of evaporators fail to give full play to their efficiency, resulting in a lack of refrigeration capacity, slowing down the cooling rate and reducing the cooling effect of air conditioning, which will have a negative impact on system performance.
        2、假如熱力收縮閥的開度太大,即熱收縮閥供應蒸發器的液體量大于蒸發器的負荷,則會使一些液體制冷劑在蒸發器中蒸發并進入 緊縮機與氣態制冷劑一同,招致液錘(濕行程),以至氣缸沖擊事故,并損壞緊縮機。另外,當制冷才能過大時,會惹起振蕩,間歇性地向蒸發器供給過多的液體,招致緊縮機的吸入壓力急劇動搖。同時,熱力收縮閥的開渡過大,這增加了蒸發溫度,降低了制冷量,增加了緊縮機的功耗,增加了功耗。
        2. If the opening of the thermosystolic valve is too large, that is, the amount of liquid supplied by the thermosystolic valve to the evaporator is larger than the load of the evaporator, some liquid refrigerants will evaporate in the evaporator and enter the compressor together with the gaseous refrigerant, which will cause the liquid hammer (wet stroke), and even the cylinder impact accident, and damage the compressor. In addition, when the refrigeration capacity is too large, it will cause oscillation, intermittently supplying excessive liquid to the evaporator, resulting in sharp fluctuation of the suction pressure of the compressor. At the same time, the opening of the thermal shrinkage valve is too large, which increases the evaporation temperature, reduces the refrigeration capacity, increases the power consumption of the compressor, and increases the power consumption.
        一文弄懂熱力收縮閥該如何選擇
        Understanding how to choose thermal shrinkage valve關于熱力收縮閥的選擇我們需求依據制冷系統的制冷劑品種、蒸發溫度范圍和蒸發器過熱負荷的大小來停止參考判別。以下幾點是選擇時需求肯定的:
                                                   濟南空壓機
        As for the choice of thermal shrinkage valve, we need to stop the reference judgment according to the refrigerant type of refrigeration system, the range of evaporation temperature and the size of the evaporator superheat load. The following points are certain when choosing:
        1、肯定閥的壓力降。
        1. Pressure drop of positive valve.
        冷凝壓力和蒸發壓力之間的差值。 經過從該差值中減去一切其他壓力損失來取得閥的凈壓降。 但是,應思索一切可能的壓降源:(1)流經包括冷凝器和蒸發器在內的制冷劑管道時的摩擦損失,(2)流過液體管道配件(如電磁閥和過枯燥器)時的壓降,(3)靜電 液體管垂直提升(降落)惹起的壓降(上升),和(4)經過制冷劑分配器(假如運用分配器)時的壓降。
        The difference between condensation pressure and evaporation pressure. The net pressure drop of the valve is obtained by subtracting all other pressure losses from the difference. However, all possible sources of pressure drop should be considered: (1) friction loss when flowing through refrigerant pipes including condensers and evaporators; (2) pressure drop when flowing through liquid piping fittings (such as solenoid valves and dryers); (3) pressure drop caused by vertical lifting (falling) of electrostatic liquid pipes; (4) pressure drop caused by passing through refrigerant distributors (if using distributors) Pressure drop at time.
        2、從每個閥門系列的制冷量參考表當選擇閥門。
        2. Select the valve from the refrigeration capacity reference table of each valve series.
        依據設計的蒸發溫度和可用閥門的壓降,假如可能,閥門的制冷量應等于或略大于設計等級。 系統。 關于具有多個蒸發器的系統,應依據每個蒸發器的制冷才能選擇每個閥門。
        According to the designed evaporation temperature and the pressure drop of the available valve, if possible, the refrigeration capacity of the valve should be equal to or slightly greater than the design grade. System. For systems with multiple evaporators, each valve should be selected according to the refrigeration of each evaporator.
        3、肯定系統的制冷劑類型。
        3. To confirm the refrigerant type of the system.
        4、肯定蒸發器的蒸發溫度范圍。
        4. Define the evaporation temperature range of evaporator.
        5、肯定能否需求外均衡管。
        5. Affirming whether external equilibrium tube can be needed.
        閥出口和溫包所在局部之間的壓力降,將肯定能否需求外均衡管。
        The pressure drop between the outlet of the valve and the part where the thermostat is located will determine whether the external balancing pipe can be required.
        6、制冷量。
        6. Refrigeration capacity.
        7、熱力收縮閥入口和出口之間的壓差。
        7. Pressure difference between inlet and outlet of thermosystolic valve.
        8、內部或外部壓力均衡方式。
        8. Internal or external pressure balance.
        9、接收口徑規格。
        9. Receiving caliber specifications.
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