Chiller quality appraisal

chiller is a cooling water equipment that can provide constant temperature, constant flow and constant pressure. The working principle of the chiller is to first inject a certain amount of water into the water tank inside the machine, cool the water through the chiller refrigeration system, and then send the low-temperature cooling water to the equipment that needs to be cooled by the water pump. The chilled water of the chiller takes away the heat and then the temperature rises and then flows back to the water tank to achieve cooling.
chiller is used in CNC machine tools, coordinate boring machines, grinders, machining centers, combined machine tools and various types of precision machine tool spindle lubrication and hydraulic system transmission medium cooling. It can accurately control the oil temperature, effectively reduce the thermal deformation of the machine tool, and improve the processing accuracy of the machine tool.
Zhongke Testing and Appraisal Institute can provide chiller quality appraisal services and make accurate appraisals in terms of product design analysis, load analysis and product quality analysis.

1. Pressure test
During the test, use a high-pressure pump to pressurize the water to the specified pressure, and then check whether the chiller can work normally and whether the pressure condition is normal. If the chiller can work normally and maintain the specified pressure, then the chiller can be judged to be qualified.
2. Temperature test
During the test, connect the chiller to the machine or equipment to be tested and immerse the thermometer in the water. Then, turn on the chiller and adjust the water temperature according to the working requirements of the equipment. By checking the thermometer reading, you can determine whether the chiller is working as required.
3. Environmental test
When testing, place the chiller in a certain environment, such as high temperature, low temperature, humidity, etc., and observe the working condition of the chiller. By comparing the working conditions of the chiller in different environments, a comprehensive assessment can be made to determine its eligibility.
4. Performance test
When testing, it is necessary to measure the power of the chiller, the flow rate of the coolant and other parameters to evaluate whether its performance meets the requirements. By comprehensively evaluating various parameters, we can determine whether the chiller is qualified.

GB 19577-2015 Chiller energy efficiency limit value and energy efficiency grade
GB/T 18431-2014 Steam and hot water lithium bromide absorption chiller
GB/T 29363-2012 Vapor compression cycle chiller for nuclear power plants
GB 29540-2013 Energy efficiency limit value and energy efficiency grade of lithium bromide absorption chiller
JB/T 12325-2015 High water temperature chiller
CB/T 3319-2013 Marine lithium bromide absorption chiller
CB/T 4356-2013 Marine piston chiller
JB/T 3355-1998 Centrifugal chiller
CB/T 4359-2013 Marine screw chiller
JB/T 7227-1994 Composite heat source heat pump screw chiller
0CB/T 4358-2013 Marine centrifugal chiller
1JB/T 7247-1994 Lithium bromide absorption chiller
2

A technology company signed a purchase agreement with a machinery company to purchase 2 model XXXX screw heat recovery chillers (hereinafter referred to as the disputed chillers) from the machinery company. However, after it was officially put into use, the technology company discovered that the chiller was experiencing excessive voltage and current overload. Later, due to disagreements, the machinery company went to court.
Our company was entrusted by the court to undertake the quality analysis of the "chiller" involved in this case.
identification and analysis results: The
quality analysis expert group discussed and comprehensively technical analyzed the relevant information, on-site investigation and inspection, and inspection and testing data of the "chiller" involved in the case, and made the following quality analysis opinions:
complained that there were excessive high voltage and current overload in the operation of the chiller. The main reason was that the cooling water flow rate of the system was reduced and the cooling water temperature increased.