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...

  As global attention to environmental protection and climate change continues to rise, the choice of refrigerants for cold storage not only affects efficiency and cost-effectiveness but is also influenced by international environmental regulations. Agreements like the Paris Agreement and the Montreal Protocol, with the Kigali Amendment, impose new requirements on refrigerant usage. This article will introduce the physical characteristics, application advantages and disadvantages of commonly used refrigerants, and analyze them in the context of international environmental regulations. 1.  R22  Screw Type Air Source Heat Pump  (Hydrochlorofluorocarbon - HCFC): Physical Characteristics: R22 was once one of the most widely used refrigerants, known for good heat exchange performance, low toxicity, and moderate Global Warming Potential (GWP). Category: Hydrochlorofluorocarbon (HCFC). Advantages: High energy efficiency, cost-effective, strong adaptability to equipment. Dis...