1. Refrigerant leakage: After the refrigerant leaks in the system, the cooling capacity is insufficient, the suction and exhaust pressures are low, and the intermittent "squeaking" airflow sound much larger than usual can be heard at the expansion valve. There is no frost or a small amount of floating frost on the cold room evaporator. If the expansion valve hole is enlarged, the suction pressure still does not change greatly. After the shutdown, the equilibrium pressure in the system is generally lower than the saturation pressure corresponding to the same ambient temperature. 2. Excessive charging of refrigerant after maintenance: The amount of refrigerant charged in the refrigeration system after maintenance exceeds the capacity of the system, and the refrigerant will occupy a certain volume of the cold room condenser, reduce the heat dissipation area, and reduce the cooling effect. The suction and exhaust pressure are generally higher than the normal pressure value, the evaporator is not frosted solidly, and the cooling in the warehouse is slow. 3. There is air in the refrigeration system: the air in the refrigeration system will reduce the refrigeration efficiency. The obvious phenomenon is that the suction and exhaust pressures increase (but the exhaust pressure has not exceeded the rated value), and the compressor outlet to the condenser inlet The temperature increases significantly. Due to the presence of air in the system, the exhaust pressure and exhaust temperature increase. 4. Low compressor of condensing unit efficiency: The low efficiency of the refrigeration compressor refers to the fact that the actual exhaust volume decreases and the refrigeration capacity decreases accordingly when the working conditions remain unchanged. This phenomenon mostly occurs in compressors that have been used for a long time. The wear and tear of the compressors are large, the matching clearance of each component is large, and the sealing performance of the air valve is reduced, resulting in a decrease in the actual exhaust volume. 5. The frost on the surface of the cold room evaporator is too thick: the long-term use of the cold storage evaporator should be defrosted regularly. If it is not defrosted, the frost layer on the evaporator pipeline will accumulate and thicken. When the entire pipeline is wrapped into a transparent ice layer, It will seriously affect the heat transfer, causing the temperature in the warehouse to fall below the required range. 6. There is refrigerated oil in the cold room evaporator pipeline: During the refrigeration cycle, some refrigerated oil remains in the evaporator pipeline. After a long period of use, if there is a lot of residual oil in the evaporator, it will seriously affect its heat transfer effect. , the phenomenon of poor cooling occurs. 7. The refrigeration system is not smooth: due to the poor cleaning of the refrigeration system, after a period of use, the dirt gradually accumulates in the filter, and some me...

1. Compressor: It plays the role of compressing and driving the refrigerant in the refrigerant circuit, and is the power of the refrigeration system. 2. Condenser: It is one of the main heat exchange equipment in the refrigeration system of cold storage. Its function is to cool and condense the superheated vapor of the high-temperature refrigerant discharged from the compressor of the assembled cold storage into high-pressure liquid. 3. Evaporator: The liquid refrigerant evaporates at low pressure and low temperature, absorbs the heat from the freezer and evaporates, and turns into a gaseous refrigerant. The gaseous refrigerant is sucked into the compressor and compressed, and then discharged into the condenser to discharge heat. Basically, the principle of the evaporator and the condenser is the same, the difference is that the former absorbs heat into the storehouse, and the latter exhausts heat to the outside. 4. Liquid storage tank: store Freon storage tank to ensure that the refrigerant is always in a saturated state. 5. Solenoid valve: The first is to prevent the high-pressure part of the refrigerant liquid from entering the evaporator when the compressor is stopped, to prevent the low-pressure from being too high when the compressor is started next time, and to prevent the compressor from liquid shock. Second, when the temperature of the cold storage reaches the set value, the thermostat will act, the solenoid valve will lose power, and the compressor will stop when the low pressure pressure reaches the set value. When the electricity is turned on, the compressor starts when the low pressure pressure rises to the compressor start setting value. 6. High and low pressure protector: to prevent high pressure and low pressure from being too low to protect the compressor. 7. Thermostat: It is equivalent to the brain of the cold storage that controls the opening and stopping of refrigeration, defrosting, and the opening and stopping of fans. 8. Dry filter: filter impurities and moisture in the system. 9. Oil pressure protector: ensure that the compressor has enough lubricating oil. 10. Expansion valve: The high-pressure refrigeration liquid at the outlet of the expansion valve is rapidly expanded and evaporated, and the heat in the air is absorbed through the tube wall for cold and heat exchange. 11. Oil separator: its function is to separate the lubricating oil in the high-pressure steam discharged from the refrigeration compressor to ensure the safe and efficient operation of the device. According to the principle of oil separation by reducing the airflow speed and changing the airflow direction, the oil particles in the high-pressure steam are separated under the action of gravity. Generally, when the airflow velocity is below 1m/s, the oil particles with a diameter of more than 0.2mm contained in the steam can be separated. There are four types of oil separators commonly used: washing type, centrifugal type, packing type and filter type. 12. ...

KITDOO is honored to invite lecturers from Made-in-China.com to train the sales team of KITDOO. The main content of this training is the development trend of foreign trade in 2022, export policies, and the impact on the refrigeration industry after the implementation of RCEP. How to improve the quality of customer service and product quality. During the training, the trainees and the lecturers fully exchanged opinions. After the training, the trainees expressed their gratitude to the lecturers and analyzed the policies they learned. FOSHAN KITDOO REFRIGERATION EQUIPMENT CO.,LTD. is a comprehensive industrial company specializing in the production of refrigeration equipment integrating research and development, manufacturing, and business services. FOSHAN KITDOO REFRIGERATION EQUIPMENT CO.,LTD. specialized in the production of air cooled condensers, cooler unit, customized evaporators, large, medium and small condensing units, and provides professional refrigeration storage  design and installation services.

Since the christmas and New Year holidayis approaching near once again .KITDOO would like to extend our warm wishes for theupcoming holiday's season. And KITDOO wish you and your family a merry Christmas and a prosperous New Year.  Sincy it is a pleasure to contact with you before, and our duty is to serve you best product and excellent service. Hope the next year a prosperous and harvest year for both of us. Last but not least, as soon as you have any questions, please contact us immediately, no matter when and where. In the coming year, KITDOO will continue to provide you with high-quality condenser,  cooler unit, condensing unit and cold storage installation and consulting services. Your satisfaction is the driving force for KITDOO to move forward.

KITDOO refrigeration has designed a new type of cold room evaporator. The ordinary cold room Air cooler mainly uses the electric heating tube to carry on the defrosting. The cold room evaporator uses heat from the refrigerant to defrost. The main principle is: Condensing unit to add four-way Valve, through the valve control,The cold room evaporator has refrigeration and defrosting mode. When the cold room cooling unit works for 4 hours, the frost on the cold room evaporator fin begins. At this point open defrosting mode, the compressor outlet of high-temperature refrigerant directly into the cooler copper tube, directly use this heat defrosting. Advantages of the new cold room evaporator: 1, defrosting uniform, every copper tube can defrost. 2, defrosting speed, the new cold room cooling defrosting only 8 minutes, ordinary electric heating tube defrosting needs 30 minutes. 3. Cold storage temperature is stable. The temperature of the new air cooler evaporator changes about 5 degrees Celsius when defrosting, and the maximum temperature of the ordinary cold room cooling rises nearly 18 degrees Celsius. 4. Less power consumption. The new cold room cooling units use the same amount of electricity as normal refrigeration when defrosting. The power of the electric heating tube used in defrosting of common cold room cooling units reaches 5KW, which is 2 times higher than that of normal refrigeration.

The newly developed wire tube condensers of KITDOO Refrigeration Company has been mass-produced. This product can be customized non-standard and processed according to customer drawings. Customers are welcome to try it out. In the early stage, we should cooperate with the refrigeration evaporators and cold room refrigeration units produced by our company according to the suggestion of the Malaysian customer. Supporting production condenser for refrigerator. After three months of preparatory work, the production equipment of the condenser has been fully adjusted. After a month of small batch production trials. Wire tube condensers can already be produced in large quantities, and the production cycle and product quality can be guaranteed. Refrigerator Condensers are mainly used in household refrigerators, supermarket beverage freezers, and water dispensers.3

After three months of design, installation and commissioning, the enthalpy difference laboratory and ultra-low temperature cold storage laboratory of KITDOO Refrigeration Company were put into use. The enthalpy difference laboratory is mainly used to accurately measure the water flow, air volume, power consumption, cooling and heating capacity and other parameters of the unit products; simulate the high and low temperature conditions of the unit when it is working, and obtain the real data closest to the customer's use. The ultra-low temperature cold storage laboratory can simulate the working condition of minus 45 degrees. Under high load conditions, the power consumption and heat exchange efficiency of air cooled condensers, cold room condensing unit, cooler refrigeration unit and other products can be measured. After obtaining important data, it provides help for engineers to design and optimize products. Thereby improving the heat exchange efficiency and air volume of the cooler refrigeration unit. Ensure that the products are all high-quality products. After the completion of the laboratory, we can design non-standard air cooled condensers, cold room condensing unit, and cooler refrigeration unit for customers with high requirements and special working conditions. For example, air cooled condensers and condensing units used in high-temperature environments in the Middle East. At the same time, our company's laboratory provides external services, and all refrigeration equipment manufacturers can come to our company to test equipment products.

The KITDOO sales team completed a three-day training session at Alibaba’s headquarters. The main contents of this training are as follows: 1 International Trade Laws and regulations related knowledge development direction of refrigeration industry. ALIBABA team for my company’s sales of unit cooler evaporators, cold room condensers, condensing units to formulate the relevant pre-sales, after-sales customer service policy. Currently in order to better solve related problems for customers.