簡介：

暖通空調是具有采暖、通風和空氣調節功能的空調器。由于暖通空調的主要功能包括：采暖、通風和空氣調節這三個方面，縮寫HVAC(Heating,Ventilating and Air Conditioning)，取這三個功能的綜合簡稱，即為暖通空調。

在現代的建筑中，上述機能（包括其控制系統，及系統的設計及安裝）會整合在一個或多個的暖通空調系統中。針對小型的建筑，承包商會直接依需求選擇暖通空調系統及設備。若是大型的建筑，會由建筑設計者及機械、結構等工程師共同分析、設計并選定暖通空調系統，再由專業的機械承包商來安裝。

暖通空調系統根本的目標是實現對環境溫度的調控，以滿足人們對環境舒適度以及一些工藝性的要求。

在早期的暖通空調系統中，一般采用定流量水力系統，通過對末端設備風量的分檔控制來實現對目標區域環境溫度的調節，如采用三速開關調節風機盤管風量以及通過變風量空調箱進行風量調節等。這種調節是簡單、粗略以及分散式的，且在系統初調試合格后不需再對水力系統進行調節。

隨著人們對環境舒適度的要求以及節能意識的不斷提高，這種調節已經不能滿足要求。于是人們開始采用變流量水力系統以及變風量系統，通過電動調節閥或風閥執行器對系統的水量或風量進行連續調節來實現對環境溫度的精確控制。

電動調節閥既可以通過與各種傳感器、變送器以及控制器相連組成分散式的控制系統，也可以與樓宇控制系統相連組成分散控制、集中管理的中央控制系統，從而大大地提高了系統對環境溫度調控的能力。

但是在一些系統負荷波動較大的變流量系統中，由于多臺電動調節閥同時工作，任何一臺電動調節閥工作狀態的改變都會對其它的電動調節閥產生影響，而電動調節閥本身的抗干擾能力又比較差，從而造成了整個系統不穩定，對環境溫度的調控能力下降，調節精度降低。

因此在目前的一些大型變流量中央空調水系統中，一種具有較強抗干擾能力的新型調節閥—動態平衡電動閥得到越來越廣泛的應用。

同時，一種全新的全面平衡水力系統，也因其高效、穩定和節能而被越來越多的大型變流量水系統所采用。

HVAC is an air conditioner with heating, ventilation and air conditioning. Since the main functions of HVAC include: heating, ventilation and air conditioning, the abbreviation HVAC (Heating, Ventilating and Air Conditioning), the comprehensive abbreviation of these three functions, namely HVAC.

In modern buildings, these functions (including their control systems and system design and installation) are integrated into one or more HVAC systems. For small buildings, the contractor will select the HVAC system and equipment directly according to the needs. In the case of large-scale buildings, the architects and engineers, mechanical and structural engineers will analyze, design and select the HVAC system, which will be installed by professional mechanical contractors.

The most fundamental goal of HVAC systems is to achieve environmental temperature control to meet environmental comfort and some process requirements.

In the early HVAC system, a constant-flow hydraulic system was generally used to adjust the ambient temperature of the target area by controlling the air volume of the end equipment. For example, a three-speed switch was used to adjust the fan coil air volume and pass The variable air volume air conditioner performs air volume adjustment and the like. This adjustment is simple, coarse and decentralized, and there is no need to adjust the hydraulic system after the initial commissioning of the system.

As people's demands for environmental comfort and awareness of energy conservation continue to increase, this adjustment is no longer sufficient. Therefore, people began to use variable flow hydraulic system and variable air volume system, through the electric control valve or damper actuator to continuously adjust the water volume or air volume of the system to achieve precise control of the ambient temperature.

The electric control valve can be connected to various sensors, transmitters and controllers to form a decentralized control system, or it can be connected with the building control system to form a central control system with decentralized control and centralized management, thus greatly improving The ability of the system to regulate the ambient temperature.

But in some variable flow systems with large fluctuations in system load, since multiple electric regulating valves work at the same time, the change of working state of any one electric regulating valve will affect other electric regulating valves, and the electric regulating valve The anti-interference ability of the system itself is relatively poor, which causes the whole system to be unstable, the ability to regulate the ambient temperature is lowered, and the adjustment precision is lowered.

Therefore, in some large-scale variable-flow central air-conditioning water systems, a new type of regulating valve with strong anti-interference ability-dynamic balancing electric valve has been widely used.

At the same time, a new fully balanced hydraulic system is also being adopted by more and more large variable flow water systems due to its efficiency, stability and energy efficiency.

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