PIZZATO Switch FR 20A7-M2

08/24/2020

What kind of equipment is generally used in cold storage How to select the refrigeration equipment

The cost of cold storage with a refrigeration capacity of less than 60kw is relatively large, and it is generally suitable for small cold storage and air conditioning units. The cost of such small cold storage within 100 square meters ranges from 30,000 to 100,000.

10/30/2025

The knowledge about the intake valve of the screw air compressor is here

The air compressor intake valve can also be said to be an intake control combination valve, which has functions such as intake control, loading and unloading control, capacity adjustment control,

08/12/2020

Disassembly steps and installation precautions of central air conditioning

Air conditioners have been in our lives for a long time. The central air conditioners installed in some homes or other places may be very old. It is time to disassemble, repair, or replace them.

06/23/2022

How to Test a Transformer?

Transformers are an electrical component that transmit electrical energy between at least two circuits. Transformers regulate the voltage in circuits, but in some cases these can go bad and cause a circuit to not work.

08/24/2020

Reason analysis of refrigeration compressor can not start or stop soon after start

1) First check the main circuit. Whether the power supply has power, whether the voltage is normal, whether the fuse has been blown due to starting overload, whether the air switch has tripped, whether the switch contacts are good, and whether the power supply is missing phase. Observe the voltmeter and ammeter when starting. When the small-scale refrigeration and air-conditioning equipment does not have an ammeter or electric meter, a multimeter or electric pen can be used to check the power supply. When the power supply voltage is too low, the compressor will not start.

08/14/2020

What to pay attention to when building a chiller room

What should I pay attention to when building a chiller room? The machine room is to allow the chiller to have an independent and stable operating environment, avoid wind and sun, and various debris or dust to damage the unit

06/29/2020

Compression ratio of American Copeland compressor

07/27/2020

The heat is unbearable, and the car air conditioner is turned on like this to quickly cool down

It is the dog days right now. As the saying goes: "Small summer heat catches the big heat, so there is nowhere to hide." If the outdoor in summer is like a stove, then the car can definitely be regarded as an "alchemy stove".

07/19/2020

Energy Adjustment of Refrigeration Compressor of Industrial Refrigerator

Energy Adjustment of Refrigeration Compressor of Industrial Refrigerator In addition to the intermittent operation of the compressor, the energy adjustment of the refrigeration compressor of an industrial refrigerator can also be achieved by changing the passage area of ​​the compressor suction stop valve. If the area of ​​the cut-off valve channel of the refrigeration compressor of the industrial chiller is reduced, the flow resistance of the suction steam will increase, and the steam will be throttled, resulting in a corresponding decrease in the pressure of the suction chamber,

08/07/2025

Differences between Circuit Breaker and Isolator Switch?

A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can do the same under abnormal circuit conditions within a specified time.