Danfoss Compressor SZ147A4CAQ

08/05/2020

Simple estimation and measurement of indoor and outdoor wind pressure difference in fresh air system

At present, most of the fresh air systems we use follow the design philosophy of large air volume and slight positive pressure, but many people are also confused about this. How to detect the pressure in the room on site?

08/17/2020

Too high or too low oil pressure of industrial chillers affects normal operation

When using industrial chillers, regular inspection and maintenance work is essential. In the absence of basic maintenance and regular inspections, many industrial chillers are prone to different failures.

08/11/2020

Don't worry if the refrigeration unit fails, look here!

Many of the failures of the refrigeration unit are compressor problems. According to the different problems of the refrigeration unit failure, we analyze and decide how to solve the failure of the refrigeration unit reasonably.

07/31/2020

Refrigeration principles of refrigerators and air conditioners

Refrigerator is a kind of refrigeration equipment that keeps a constant low temperature, and it is also a civilian product that keeps food or other items in a constant low temperature and cold state. There are cabinets or boxes for freezing by compressors and ice machines, and storage boxes with refrigeration devices

06/29/2020

Several causes of compressor burning

06/14/2020

What is the principle of air conditioning expansion valve Technical stickers!

The electronic expansion valve is a throttling element that can enter the refrigerant flow of the refrigeration device according to a preset procedure. In some occasions where the load changes drastically or the operating range is wide, the traditional th器2䀀
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03/24/2025

PC Airflow Channel Design: the Best Layout of the Case Airflow Channel

The power supply, CPU, chipset, memory, and graphics card in the computer case can generate a lot of heat.

06/18/2020

Main components of reciprocating compressor_Advantages and disadvantages of reciprocating compressor

Reciprocating compressor<img src="{{media url=&quot;wysiwyg/Main_components_of_reciprocating_compressor_1.jpg&quot;}}" alt="" /> 　　Reciprocating compressor refers to a type of compressor that reciprocates the piston or diaphragm in the cylinder to periodically change the volume of the cylinder and realize the pressurization and delivery of gas. It is a positive displacement compressor. According to the reciprocating components, it is divided into piston type and diaphragm type compressors.

07/05/2020

Hitachi heat pump compressor

Does the compressor not start related to the four-way valve? There is no relationship between the compressor does not start and the four-way valve. Therefore, when the four-way valve coil is damaged, it will not cause the air-conditioning compressor to fail to start normally, nor will the compressor start normally after the good four-way valve coil is replaced.

07/05/2020

Hitachi ultra-low temperature heat pump compressor

Hitachi ultra-low temperature heat pump compressor What are the characteristics of scroll refrigeration compressors? The characteristics of scroll refrigeration compressors are as follows, and their characteristics are also the goals that air-conditioning compressor manufacturing technology is constantly pursuing.