Shanghai Haozhuang Instrument Co., Ltd. has developed the LNB brand freeze dryer, which is energy-saving and environmentally friendly, leading the country. Professional manufacturing is more secure and affordable
Problem 1: The operation of the compressor is interrupted. The cause: the low-pressure switch is not operating normally. Countermeasures: Check whether the control line of the low-pressure switch of the freeze dryer is blocked. Check the switch position. Reason: insufficient refrigerant. Countermeasure: add refrigerant. Cause: freeze dryer suction Valve closing or partial closing countermeasures: Opening reason: Hot gas bypass valve clogging countermeasure: Repair reason: Expansion valve or capillary ice clogging countermeasure: Refrigerant replacement problem: Condensing pressure is too high Cause: Water condenser heat dissipation countermeasure: Use dilute hydrochloric acid Cleaning the condenser with a brush Cause: Air in the refrigeration cycle Countermeasure: New vacuum, replacement of refrigerant Cause: Too much refrigerant Countermeasure: Too much refrigerant released Cause: Insufficient cooling water Countermeasure: Increased cooling water Cause: Wind Countermeasure for poor heat dissipation of the condenser: blow the condenser with dry compressed air Reason: the fan switch is set abnormally Countermeasure: adjust the setting value Reason: the ambient temperature is too high Countermeasure: increase the environmental ventilation effect Problem: the condensation pressure is too low Cause: the fan Countermeasure for abnormal switch setting: Reason for adjusting the set value: Countermeasure for excessive opening of the hot gas bypass valve : Adjust the bypass valve counterclockwise Cause: Excessive cooling water countermeasures: Turn off the cooling water
Problem 2. The power supply freeze dryer does not operate Reason: no voltage at the incoming line or low voltage countermeasures: check the incoming power switch and fuse and eliminate the cause of the failure: high voltage protection switch disconnection countermeasure: reset reason: loose wiring countermeasure : Check the wiring and tighten the reason: Compressor motor burnout countermeasures: inspection, replacement reasons: AC contactor damage countermeasures: inspection, replacement reasons: refrigeration dryer refrigerant leakage countermeasures: leak detection, make up leakage, add refrigerant. Cause: The automatic air switch is not turned on Countermeasure: Turn on the automatic air switch
Problem 3: The evaporating pressure of the freeze dryer is too high Reason 2: The opening degree of the expansion valve is too large Countermeasure: Adjust the expansion valve clockwise to reduce the reason 2: The expansion valve temperature package is not close to the outlet wall of the evaporator Countermeasure: Reinstall the temperature Package reason 2: Expansion valve failure countermeasures: replace expansion valve
Question 4: Low evaporating pressure of the freeze dryer and system noise Cause 2: Insufficient refrigerant countermeasures: Reason for adding refrigerant 2: Insufficient gap between compressor piston and valve plate Countermeasure: Replace damaged parts Cause 2: Expansion valve sound countermeasures: Increase refrigerant, replace filter Reason 2: Sound from hot gas bypass valve Countermeasure: This sound is normal and does not affect operation
Question 5: The air pressure drop at the outlet of the freeze dryer is too large Cause: The treatment air volume exceeds the rated value. Countermeasure: The dryer is selected according to the actual treatment air volume. Excessive countermeasures: Reset the piping system Reason: The inlet and outlet valves are not fully opened Countermeasure: Open the inlet and outlet valves Cause: The pipeline is leaking or the filter is blocked Countermeasure: Repair or unblock the pipeline and filter Countermeasure: deal with frost, clear the pipeline
Haozhuang R & D team's forward-looking technology development vision and strong technical strength are actively in line with the needs of scientific research. By promoting the continuous innovation of Haozhuang brand, Haozhuang's differentiated competitive advantage has been continuously improved, making Haozhuang always proud. The status of the industry leader. Taking advantage of the opportunity of the industrial gradient transfer in Shanghai where Haozhuang Company is located, Haozhuang will implement its headquarters to enter Hong Kong in the next five years, and will deploy Haozhuang Hong Kong Company to the global industry.
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