supermarket refrigerated showcase » article > display freezer > display cooler refrigeration failures and maintenance methods (7)
display cooler refrigeration failures and maintenance methods (7)
display cooler
refrigeration failures and maintenance methods (7)
① to prevent dew The pressure of the pipe is 1.2MPa and the pressure is maintained for 24 hours. If the pressure gauge drops below 1.1MPa, it is necessary to judge that the anti-exposure pipe is leaking. It should be thrown away and directly connect the condenser nozzle to the compressor exhaust pipe.
②For the low-pressure pipeline, that is, press 0.8MPa on the evaporator, and hold the pressure for 24 hours. If the pressure gauge drops below 0.7MPa,
n1n , >
judge the evaporator leakage. For the built-in evaporator, set the self-made evaporator in the display cooler inner tank: For the exposed evaporator, continue to press the upper and lower evaporators separately by 0.8MPa, check the leakage with soapy water, and check the leakage. Point for repair welding or sticking. After the above inspection finds the leakage point and repairs the machine, restore the pipeline connection, replace the dry filter, blow through the system, suppress the shaft, fill the refrigerant, and seal. If no leaks are found in the above maintenance, the exposed refrigeration pipelines should be pressured to check for leaks. The focus is on the welds and condenser welds and repair the leaks. Then the system is blown through, evacuated, filled with refrigerant, and sealed.
three, good appearance, poor cooling, total pressure leakage failure phenomenon: poor cooling, observe that the exposed refrigeration pipeline and the middle door frame are normal, unplug the
display cooler power supply, and turn it on There is a small amount of refrigerant discharged from the compressor process tube, and the total pressure of the system is 0.8MPa, which will drop below 0.7MPa within 24 hours. Failure analysis: Only a small amount of refrigerant is discharged from the bleed and the total pressure is leaked, both of which indicate that the refrigeration system has leaks, mostly low-pressure pipeline leaks, and a few leaks in other parts. Troubleshooting: Follow the following three steps.
① The anti-exposure pipe is first pressured 1.2MPa, and then the low pressure pipeline is pressured 0.8MPa. If the anti-exposure tube leaks, throw it away, such as the low-pressure pipeline leaks, insert a new evaporator for the built-in evaporator model. For exposed evaporator models, continue to pressure the upper and lower evaporators to check for leaks, and check for leaks.Point for repair welding.
②Press and check other pipelines for leaks, and apply soapy water to the welds of the exposed pipelines or suspected leaks. The air bubbles are where the leaks are. Repair welding after nitrogen is removed.
>
four, good appearance, poor cooling, no leakage of total pressure. Failure phenomenon: poor cooling, observe that the exposed refrigeration pipeline is free of stains and corrosion, the side of the freezer compartment of the middle door frame No rust. Open the compressor process tube to vent, the gas discharge is small, the total pressure is 0.8MPa, and the pressure gauge value does not drop for 24 hours. Failure analysis: 80% is high-pressure pipeline leakage, and the possibility of leakage prevention is the greatest. Because the leakage of high-pressure pipeline sometimes needs to be pressured to 1.2MPa, it can only be detected. A few are the poor performance of the compressor, and the old model should be considered Waxing of the capillary leads to a smaller inner diameter, which affects the flow of refrigerant. Troubleshooting: Follow the following three steps.
① separately pressure the condenser and anti-dew tube in the high-pressure pipeline by 1.2MPa, and hold the pressure for 24 hours. If the pressure of the anti-dew pipe drops below 1.lMPa, or the pressure of the display cooler anti-dew pipe and the condenser does not drop, it is necessary to judge that the anti-dew pipe is leaking and throw it away. Connect the condenser nozzle to the compressor exhaust pipe: If only the condenser pressure drops to l.lMPa, it is necessary to judge that there is a leak in the condenser, and use soapy water to detect the leak and repair the welding.
②Test the compressor exhaust performance, weld open the compressor exhaust pipe port, plug in the power supply to make the compressor run, press the exhaust pipe port with your thumb, if It is easy to block, and it is necessary to judge that the compressor has poor exhaust performance and replace the compressor of the required model.
the above articles are from refrigerated showcase display cooler, display cooler prices, for details, please visit: www.ihdjx.com
free order hotline: +86 18019567573
keywords:
Ranking of similar articles
- refrigerated showcase Refrigeration Equipment Co., Ltd. growth process
- Watermelon fresh-keeping refrigerator can better preserve the nutrients of watermelon
- Refrigerated showcase ltd. refrigeration has been a leader in innovation and energy saving
- The advantage of western restaurant made salad bar - refrigerated showcase
- Refrigerated showcase warm, kick off the new offers
- Don't put the frozen food in shenzhen supermarket display cooler, rapid freezer storage in shenzhen more than two
- Supermarket walk - cooler in fruits and vegetables preservation equipment
- Refrigerated showcase display cooler company 2012 annual celebration
- How to enhance the international competitiveness of the display cases industry
- display cases refrigeration but noisy maintenance (2)
- Commercial refrigeration secondary failure machine noise is large (two)
- Selection of expansion valve in display cases (2)
- Display cooler evaporator embedding and production
- Supermarket commercial refrigeration price range of refrigeration products directly affect the market
- Supermarket refrigerated showcase, supermarket refrigerated showcase, frozen ark excess capacity
- The accelerated development of supermarket refrigerated showcase is conducive to stimulating consumption
- General principles of design and layout of display cooler refrigeration system (3)
- General principles for the design and layout of walk-in cooler refrigeration systems (2)
- The green and energy-saving supermarket supermarket refrigerated showcase has been improving
- display cases The personal hygiene impact of the staff
Latest news articles
- May 2011 refrigerated showcase Qingyuan Tour
- refrigerated showcase Refrigeration Equipment Co., Ltd. growth process
- Refrigerated showcase major sales walk - cooler in class
- Refrigerated showcase display cooler written commercial display cooler legend
- Refrigerated showcase walk - in cooler energy-saving progresses steadily
- 2012 take care of the old man from the supermarket refrigerated showcase
- refrigerated showcase Tip: Which fruits are not suitable for placing in the fruit refrigerated showcase
- Dragon fruit reveals ark makes pitaya ornamental fruit
- Watermelon fresh-keeping refrigerator can better preserve the nutrients of watermelon
- Represent the frozen watermelon fruit for storage
- Hairy crabs freezer frozen taste more fresh
- How hairy crabs fresh refrigerated showcase display cooler tell you
- Large supermarket display ark how to choose the right goods
- Small convenience store owner should show how to choose the convenience stores ltd. refrigeration
- Refrigerated showcase ltd. refrigeration has been a leader in innovation and energy saving
- In September 2012, refrigerated showcase west chung
- Refrigerated showcase walk - in cooler cleaner which aspects should be paid attention to
- Correctly use refrigerated showcase supermarket refrigerated showcase the matters needing attention
- , a refrigerated display showcase meat cooler features of the product
- Refrigerated showcase walk - in the cooler is icy