H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  ​It comes to charging refrigerant in   HVAC systems , there are various techniques that be utilized for accurate results. Each method has its advantages and is suitable for different scenarios. In this article, we will explore six charging techniques and their applications. 1. Weighing Method: The weighing method is the most accurate approach, involving the direct addition of the required amount of refrigerant into the system. This technique is particularly suitable when the charging requirements are known, and a full charge is needed. It is commonly used for self-contained units. In the case of smaller charging amounts during system repairs, it is customary to release the refrigerant, perform the necessary repairs, and then add the required quantity. 2.   Current Method: Using the rated current, the current method requires the installation of a clamp ammeter at the input of the air conditioning power supply. To charge the system, connect the refrigerant cylinder to the low-pressure

 Water Chillers are generally divided into the following categories: screw chillers, centrifugal chillers, water ring heat pump units, plate and tube evaporative condensing screw chillers, thermal storage air conditioners, etc. Screw chiller and centrifugal chiller are equipment that we often encounter. Below,  Oumal Refrigeration  will take you to understand the difference between centrifugal chiller and screw chiller? What is a  screw chiller ? The compressor adopts a screw type, hence the name screw chiller. The refrigerant coming out of the evaporator of the unit is a gas; after adiabatic compression by the compressor, it becomes a high-temperature and high-pressure state. The compressed gas refrigerant is isobarically cooled and condensed in the condenser. After condensation, it changes into liquid refrigerant, and then expands to low pressure through the throttle valve and becomes a gas-liquid mixture. The liquid refrigerant under low temperature and low pressure absorbs the heat

  Central air conditioning can be classified into three main types: electric refrigeration air conditioning, lithium bromide refrigeration air conditioning, and other energy source air conditioning. Among them, electric refrigeration air conditioning is the most commonly used form of air conditioning. Let's discuss the classification of electric refrigeration air conditioning in detail. I. Classification by Cooling Method Air-cooled: The condenser uses forced air convection for heat exchange. This type is commonly used in residential air conditioners. Air-cooled air conditioners can be categorized into single cooling type and heat pump type. The single cooling type is only used for cooling in summer, while the heat pump type can provide both cooling in summer and heating in winter. Water-cooled: Heat dissipated by the condenser is cooled using water flow. In order to save water, the cooling water discharged from the condenser is pumped to the cooling water tower, where it undergoes