Hitachi Compressor SD134SW-P6AG

06/14/2020

Common electronic expansion valve problems for air conditioners

Common electronic expansion valve problems for air conditioners 1. Principle of Electronic Expansion Valve 　　 The angular displacement generated by the stepper motor drives the rotation of the valve needle in the valve body, thereby realizing the auto器2䀀
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08/20/2020

Strategy丨Common failures and maintenance of piston refrigeration compressors

1. The refrigeration compressor cannot start normally 　　Overhaul ideas 　　 1. Firstly, check whether it is caused by low power supply voltage or poor motor circuit connection.

09/06/2020

Design steps of two-wire AC current transmitter

Known high-current current transformers convert different currents into 0~5A alternating current for on-site display. For long-distance transmission, the current must be converted into a standard DC current signal of 4-20mA before transmission.

06/20/2020

How to properly clean the air conditioner yourself

After a winter of inactivity, the air conditioner that has been "dusted" for a long time is reactivated. It is believed that most of the friends are directly plugged in and turned on. In fact, this is not correct. <img src="{{media url=&quot;How_to_properly_clean_the_air_conditioner_yourself.jpg&quot;}}" alt="" /> It is necessary to know that the air conditioner has accumulated dust and breeds bacteria after being left for a long time. Blowing out with the wind seriously threatens your health. This is actually due to the working principle of the air conditioner: when cooling, the room temperature air is continuously sucked in, filtered by the filter, and then cooled by the fins of the heat exchanger, and finally the cold air is blown out, and then returned to the room for reciprocating circulation.

08/11/2020

Which three points should refrigerating machine manufacturers pay attention to when doing air tightness test

After the assembly of each refrigeration unit is completed, a series of tests are required to ensure the safe and stable operation of the unit, and there is an air tightness test. So, what should the refrigerator manufacturer pay attention to when doing the air tightness test?

08/01/2022

Matters During Installation of Hydraulic Motor

As one of the executive components of hydraulic system, hydraulic motor is particularly important in practical use.

08/09/2020

How does the HVAC industry achieve energy conservation and environmental protection

The principles of HVAC development are summarized as: energy saving, environmental protection, sustainable development, ensuring the sanitation and safety of the built environment, adapting to the national energy structure adjustment strategy

06/29/2020

Compression ratio of American Copeland compressor

09/09/2020

How to choose an air filter

Air filters are usually used in ventilation replacement gas and temperature control and conditioning projects. In addition to purifying the air, some also have the functions of fire prevention, moisture prevention and insect prevention.

01/20/2021

On-board oil-free air compressor, after reading these faults, you can solve them by hand

1. Excessive temperature rise 　　Excessive temperature rise is a common fault during the operation of vehicle-mounted air compressors. Vehicle-mounted oil-free air compressors often operate at high temperatures,