What is remote refrigeration unit?

A remote refrigeration unit, also known as an outdoor refrigeration unit, is a specialized type of refrigeration system commonly used in commercial and industrial applications.Remote refrigerators are insulated cold food storage areas that are outfitted with an evaporator inside, but the compressor and condenser are located in a remote area away from the refrigerator itself.

How does refrigeration work?

The refrigeration cycle is a means of routing heat away from the area you want to cool. This is accomplished by manipulating the pressure of the working refrigerant (air, water, synthetic refrigerants, etc.) through a cycle of compression and expansion.

The liquid refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant using a compressor, and then sent to the condenser for heat dissipation to become a low-temperature and high-pressure liquid refrigerant, so the condenser blows out hot air. Then go to the throttling device (usually using a capillary tube) to throttle and reduce pressure, and enter the evaporator. Due to the sudden increase in space and decrease in pressure after the refrigerant reaches the evaporator from the capillary tube, the liquid refrigerant will vaporize and become a gaseous low-temperature refrigerant, absorbing a large amount of heat. The evaporator will become cold, and direct cooling or air cooling will be used to achieve cooling inside the cabinet.

Main components of the remote refrigeration unit

The compressor : Compression is the first step in the refrigeration cycle, and a compressor is the piece of equipment that increases the pressure of the working gas. Refrigerant enters the compressor as low-pressure, low-temperature gas, and leaves the compressor as a high-pressure, high-temperature gas.

The condenser :The condenser removes heat from the hot refrigerant vapor gas vapor until it condenses into a saturated liquid state, a.k.a. condensation.

Condensing fan : It blows the external air to the condenser to strengthen the heat transfer effect of the condenser.

High-pressure liquid storage tank : used to store liquid refrigerant condensed through the condenser, high-pressure liquid storage tank can store a certain amount of liquid refrigerant. The root

Adjust and supplement refrigerant required by refrigeration system according to the change of refrigeration system working condition

Pressure controller: A device that maintains the normal operation of the refrigeration system when the condensing pressure and evaporation pressure in the system exceed the use of the compressor.Stop the compressor through the pressure protector when the limit is reached.

Gas-liquid separator : the gaseous refrigerant at the outlet of the evaporator may be in a gas-liquid mixed state, and the role of the gas-liquid separator is to put the refrigerant liquid in Gas separation, effectively prevent the compressor liquid strike.

Sight glass : The sight glass can be used to determine whether the refrigerant is properly charged and the water content in the system.

Advantages of remote refrigeration unit

high cooling efficiency：The refrigerant gas is pressurized by the compressor and becomes a high temperature and high pressure gas, which enters the heat ex-changer of the outdoor unit (at this time, it is the condenser) condenses, liquefies and releases heat, and the heat is released to the atmosphere, rather than to the indoor space. This is a good way to avoid increasing the temperature in the room.This can result in energy savings and more efficient cooling within the building.

Low noise :It relocates the noisy compressor unit, often referred to as the condensing unit, away from the refrigerated space. This helps to reduce noise levels within the building and prevent the transmission of vibrations, making it suitable for environments where noise control is important or where the refrigerated space is nearby quiet areas.

Increase the cooling space :Whether it is a vertical or horizontal condensing unit, it needs to occupy a part of the internal space of the refrigeration equipment to carry out normal operation.however,  Remote refrigeration units can easily avoid this problem by being placed outside.

Easy maintenance : Remote refrigeration units often have integrated controls and monitoring systems that enable remote management and provide alerts for maintenance or performance issues.Because it is outdoor, maintenance personnel do not need to open the refrigerator or freezer cabinet during maintenance, and can repair directly

Features of Boyard outdoor units

1.The unit use medium and low temperature compressor ;

2.The ambient temp, range for the unit working from -20~-48℃ ;

3.The unit use Optimized Internal thread condenser can reduce refrigerant charging ;

4.All models equipped with microcomputer control board, sight glass and AC contactor;

5.Fixed speed units and variable frequency units,Horsepower covers 1~12HP;

6.Support differentiated customization; Compressor requirements met includes Boyard ,Copeland,Hitachi，etc

Comparison of fixed frequency and variable frequency units

The starting frequency of a fixed frequency compressor is much higher than that of a variable frequency compressor. Every time the compressor starts, it consumes a lot of electricity. However, variable frequency compressors are more intelligent and have more precise temperature control, so the compressor does not start frequently, which makes it more energy-efficient. Generally, it can save 10% to 35% energy, and the amount of energy saved depends on the working conditions of the compressor and the setting of the frequency converter parameters.

The data used 2.5HP fixed frequency unit

The data used 2.5HP variable frequency unit

Power supply

E-220V 50Hz

Y-220V 60Hz

M-380V 50Hz

• Frequency conversion

Regular maintenance of the unit

1. Before inspection and maintenance, the power supply should be cut off and the power plug should be pulled out of the socket.
2. After the outdoor unit is used for a long time, dust will be attached to the heat ex-changer, which will reduce the heat transfer effect and reduce the cooling capacity of the unit, and clean the outdoor heat ex-changer.It should be cleaned at least once every two months, with a long-bristled brush, or with compressed air to blow off the surface of the outdoor heat ex-changer, and do not wash with tap water.
3. Regularly observe the running sound of the unit, and if there is any abnormality, please contact professionals in time for troubleshooting.