supermarket refrigerated showcase » article > walk-in display coolers > Safety protection principle of walk-in cooler refrigeration system
Safety protection principle of walk-in cooler refrigeration system
author: supermarket refrigerated showcase category: walk-in display coolers Views: 516Time: 2016-08-22
Safety protection of walk-in cooler refrigeration system
Protection components in walk-in cooler: high pressure controller 14, safety valve 18, oil pressure difference controller 15, liquid injection valve 16, Check valve 10 etc.
(1) Principle of high-pressure protection: the exhaust pressure is controlled by a high-pressure controller. When the pressure of the walk-in cooler exceeds the set value of high voltage, the high voltage control belt and high voltage controller lYL2 (or 2YL2) are disconnected, the coil of the intermediate relay 6ZJ (or 9ZJ) is cut off, and the normally closed contact 6ZJ (or 9ZJ) is closed. , The coil of the intermediate relay 8ZJ (or 11ZJ) is energized, and the normally closed contact 8ZJl (or 11ZJ_) is disconnected, causing the coil of the compressor contactor 2C (or 3C) to be de-energized, and the normally open contact 2C (or 3C) is broken Turn on, compressor I (or compressor II) stops. At the same time, the normally closed contact 6ZJ2 (or 9ZJ2) is closed, the red light is on, and the alarm sounds. When the high-pressure controller fails or the compressor is not working, the pressure of the condenser increases sharply due to fire or other reasons and exceeds the allowable value, the safety valve automatically trips to release the high-pressure refrigerant in the walk-in cooler system. To the outside of the container to prevent explosion accidents.
(2) Principle of oil pressure protection: Use the oil pressure difference controller to protect the oil pressure. When the oil pressure is less than the set value of oil pressure, the pressure difference controller 1YC (or 2YC) is disconnected, which can also make the No. 1 compressor (Or compressor II) stop.
(3) Principle of discharge temperature protection: install a liquid injection valve between the suction pipe and the high-pressure liquid pipe. When the discharge temperature exceeds the allowable value, the liquid injection valve opens and a part of the liquid refrigerant enters the suction through the valve throttling. The air pipe reduces the temperature of the suction air so as to achieve the purpose of lowering the temperature of the exhaust air.
(4) Principle of liquid shock protection: Install a check valve on the low-temperature walk-in cooler to prevent high-temperature refrigerant vapor from backflowing and condensing in the low-temperature evaporator to avoid liquid shock during startup.
The above articles are from refrigerated showcase walk-in cooler and supermarket refrigerated showcase. For details, please log in: www.ihdjx.com
>
free order hotline: +86 1806n
keywords:
Ranking of similar articles
- Refrigerated showcase display cooler written commercial display cooler legend
- Hairy crabs freezer frozen taste more fresh
- How hairy crabs fresh refrigerated showcase display cooler tell you
- Refrigerated showcase walk - in the cooler is icy
- Supermarket supermarket refrigerated showcase of fresh-keeping of supermarket refrigerated showcase refrigeration technology
- refrigerated showcase display cooler Explain the characteristics of food raw materials (3)
- Display cases Intercooler failure and analysis (2)
- display cases Capillary disassembly, diagnosis and maintenance
- My mama ah!The fruit fresh tank is too beautiful!
- refrigerated showcase commercial refrigeration The function of each component
- display cases Refrigeration failures and maintenance methods (2)
- display cases Cooling difference analysis of secondary faulty machine
- Supermarket refrigerated showcase non-stop or abnormal opening and shutdown
- display cases Inlay and production of evaporator (10)
- Display cooler refrigeration failures and maintenance methods (ten)
- display cases refrigeration failures and maintenance methods (eight)
- When buying a freezer to see performance metrics
- refrigerated showcase supermarket refrigerated showcase explains the characteristics of food ingredients (4)
- walk-in cooler refrigeration failure and maintenance method (4)
- Walk-in cooler evaporator inlay and production (eight)
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