What is a semi-hermetic compressor?- Ningbo Ouyu Import & Export Co., Ltd

A semi-hermetic compressor is a compressor that integrates the compressor and the motor in a closed housing, but the motor part is not completely enclosed. This design eliminates the traditional shaft seal device, thereby avoiding the problem of refrigerant leakage caused by shaft seal leakage, while improving the heat dissipation efficiency of the motor, making it more stable and reliable during operation.

Compact structure: The compressor and the motor are designed as an integrated whole, reducing space occupation.

Good heat dissipation performance: The motor is partially exposed to the external environment, which helps to dissipate heat and improve operating efficiency.

Easy to maintain: Compared with fully sealed compressors, the shell of semi-hermetic compressors can usually be disassembled, which is convenient for inspection and replacement of parts.

Better sealing: Although the motor part is not completely enclosed, the overall sealing is better than that of open compressors.

What is the difference between fully sealed compressors and semi-hermetic compressors?

Project	Fully sealed compressor	Semi-hermetic compressor
Structure	The compressor and motor are completely enclosed in a non-detachable housing	The compressor is partially enclosed, and the motor is partially exposed
Sealing	Excellent sealing, almost no leakage	The sealing is good, but the motor is not completely sealed
Heat dissipation performance	Poor heat dissipation, relying on air circulation inside the housing	The heat dissipation is good, and the motor can directly contact the outside air
Maintenance	Difficult to repair, complex to replace parts	Maintenance is relatively easy, and the shell is removable
Applicable scenarios	High sealing requirements and noise-sensitive occasions (such as hospitals, office buildings)	Occasions with high maintenance requirements and long operating time (such as cold storage, commercial air conditioning)
Cost	Higher cost	Relatively low cost

Summary:
Fully sealed compressors are more suitable for occasions with extremely high sealing requirements and noise sensitivity;

Semi-hermetic compressors strike a balance between sealing and maintainability, and are suitable for most industrial and commercial refrigeration systems.

Where are semi-hermetic compressors used?
Semi-hermetic compressors are widely used in the following fields due to their good sealing, high efficiency and easy maintenance:

Project	Sealed compressor (full/half)	Non-sealed compressor (open type)
Sealing	High	Low
Structure	Integrated	Separate type
Maintenance	General	Good
Applicable scenarios	High sealing requirements, noise sensitivity	Frequent maintenance, large space
Cost	High	Low

Commercial air-conditioning systems: such as central air-conditioning systems in large buildings such as shopping malls, office buildings, and hotels.

Cold storage and refrigeration equipment: such as supermarket refrigerators, food cold storage, and pharmaceutical cold storage.

Industrial refrigeration systems: such as low-temperature process cooling systems in the chemical, food processing, and pharmaceutical industries.

Transportation refrigeration: such as refrigerated trucks, cold chain transportation equipment, etc.

Household refrigeration equipment: such as refrigerators, freezers, etc. (some high-end models use semi-hermetic compressors).

High efficiency and energy saving: high energy efficiency ratio with high-quality components and optimized design.

Stable operation: with a variety of protection mechanisms (such as overheating, overload, high exhaust temperature, low oil level, high/low pressure, etc.) to ensure safe operation of the system.

Long life: reasonable structure, high-quality materials, and long service life.

Low noise: using advanced shock absorption and noise reduction technology, low operating noise, suitable for places with high requirements for environmental quietness.