H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  We all know that according to different heat dissipation methods, chillers can be divided into air-cooled chillers and water-cooled chillers. What is the difference between air-cooled chillers and water-cooled chillers? ​ 1. The  air-cooled chiller  uses copper tubes and aluminum fins to dissipate heat from the condenser. A fan is required to blow the outdoor air through the heat exchange fins and take away the heat of the condenser, so the air-cooled chiller does not need to be connected to the cooling tower. But compared with water-cooled chillers, under the same power, air-cooled chillers have larger equipment size and higher noise. The condenser of water-cooled chillers exchanges heat with the cooling water from the cooling tower through the heat exchanger. The excess waste heat will be transported to the cooling tower through the cooling water loop and released into the atmosphere, or enter the water-water heat exchanger or soil heat exchange coil for storage. Ther...

  The high-pressure failure of the chiller means that the compressor discharge pressure is too high, which causes the high-pressure protection relay to operate. The compressor discharge pressure reflects the condensing pressure, the normal value should be 1.4~1.8MPa, and the protection value setting is recommended not to exceed 2.0MPa. Because the long-term pressure is too high, it will cause the compressor to run too much current, easily burn the motor, and cause damage to the compressor. So what is the main cause of high pressure failure? How to solve it? 1. Excessive refrigerant charge. This situation generally occurs after maintenance, and it is manifested as high suction and discharge pressure and balance pressure, and the compressor operating current is also high. Solution: The refrigerant should be discharged according to the suction and discharge pressure and the balance pressure and the operating current under the rated conditions until it is normal. 2. The cooling water t...

  Spot welding machine is a kind of mechanical equipment. It adopts the principle of double-sided double-point overcurrent welding. When working, two electrodes pressurize the workpiece so that the two layers of metal form a certain contact resistance under the pressure of the two electrodes, and the welding current changes from one When the electrode flows through the other electrode, the two contact resistance points form an instant thermal fusion, and the welding current flows from the other electrode to the electrode along the two workpieces to form a loop instantly, and will not damage the internal structure of the welded workpiece. Because the resistance welding machine is in the working process, the resistance head is prone to high temperature, which affects the accuracy of the processed product, so a chiller is needed to cool it next to ensure the accuracy of the processed product. The spot welding machine is equipped with a chiller, which can improve the safety and stabili...

  As we all know, the application of   industrial chillers   is very wide, of which chillers are the most widely used in the plastics industry. So, why does the plastics industry need to use water chillers, and where do they need to use water chillers in the plastics industry? We know that a chiller is a kind of refrigeration equipment that cools water and recycles it. In plastic production, the high temperature easily affects the molding of plastic products. The chiller can be used to cool down injection molds and improve the quality of plastic products. So which plastic machinery needs to use a chiller? Below, Omar Refrigeration will take you to understand the application of chillers in the plastics industry. Injection molding machine: In the injection molding process of plastic products (televisions, computers, washing machines, mobile phones, refrigerators, air conditioners, plastic toys, automotive plastic parts, etc.), whether the product can be cooled (cooling down...

  According to the news on December 23, Chemours announced that from January 1, 2020, they will stop supplying high-GWP R404A and R507A refrigerants to the European Union. ​ At the time of this announcement, Europe is preparing to implement a ban on high-GWP refrigerants in accordance with the European F-gas regulations (517/2014) implemented on January 1. According to the European F-gas phase-out schedule, HFC refrigerants with a GWP value higher than 2500 will be prohibited from being used for maintenance or recharging of refrigeration or refrigeration systems with a charge of 40 tons or more of carbon dioxide equivalent. This is equivalent to about 10.2kg of R404A, which is a commonly used refrigerant in medium-sized systems. Small sealing systems are not affected by the ban, but most manufacturers of such systems have switched to lower GWP refrigerants. In addition to the commonly used R404A, the ban will also include R507A and R22 instead of gas R422D, both of which have a GWP...

  Air-cooled chillers   are the most widely used chillers. They are widely used in plastics, electronics, chemicals, metallurgy, video pharmacy, electroplating, leather, crafts and scientific research in industry; they are widely used in hotels in business., Hotels, supermarkets and theaters. Air-cooled chillers are also the easiest chillers to install. Since the entire system of air-cooled water chillers is equipped with fans for heat dissipation, chilled water pumps, and chilled water tanks, customers only need to connect the chilled water inlet and outlet to their own equipment to be chilled to start use. The following is the air-cooled chiller structure:   When some customers buy chillers, they worry that they do not know how to install them after they buy them. In addition, the chiller suppliers are far away and it is not inconvenient to install them on site. In fact, these problems are very simple.  Oumal chiller  specializes in producing chillers for many...

  It is inevitable that the chiller will produce sound when it is working. For example, when the fan rotates, the fan blades rub against the air, it will produce sound. Normal sound is allowed. However, even the sophisticated refrigeration equipment will appear after a long period of use. Fault. Then, the editor of   Oumal Chiller   will take you to understand the causes and solutions of the noise produced by the chiller. First, find the reason from the parts that are easy to check and observe: 1. Are the anchor screws loose? The chiller is fixed on the ground. After running for a long time, the anchor bolts will be loose, and the chiller will be unstable, which will cause noise. This situation can be solved by replacing the anchor bolts, and vibration reduction can also be installed if conditions permit. The purpose is to make the chiller firmly fixed on the ground. 2. Whether the connecting pipeline is firm There are large and small pipes on the chiller, connecting the ...