A refrigerated trailer has a closed container and a separate refrigeration unit, usually hooked to the front of the trailer. The power and refrigerant of the refrigeration unit are different for different sizes of containers and temperatures, and the way it works is also very complicated and requires a lot of equipment. Common refrigerated trucks are refrigerated pickup trucks, small refrigerated trailers, semi-trailers, double-trailers, and containers.
how does a refrigerated trailer work?
The purpose of the refrigerated trailer is to control the temperature at a preset temperature, which can be room temperature 25 ℃, for a short period of time to -18 ℃. It has a set of powerful refrigeration units and a set of thermal insulation trailer bodies, the purpose is to better transport goods that need low temperature.
The main function of the refrigerated truck is to keep the temperature inside the car at a low temperature and can eliminate the internal heat, here you need to use the condenser, which the following content will talk about.
The role of trailer body is used for thermal insulation, It generally uses fibreglass materials for the skin, and the internal use of XPS or PU, their thermal conductivity is very low, so they can resist heat spread, and the internal temperature will not be affected by the outside. XPS foam is usually used as the main one, and PU is easy to absorb water. Although PU will have better thermal insulation, once there is water, its insulation effect is not as excellent as that of XPS foam.
the working principle of refrigerated container
They mentioned how the trailer container works, now specifically to unfold its working principle.
How to make the temperature reach the required temperature is to continuously absorb heat to the inside and then discharge it out, through this process, you can finally achieve the desired effect.
The cooling unit of the refrigerated trailer contains these main components, compressor plus, evaporator, diesel generator, and evaporator.
Compressor
The compressor is the power of the refrigeration cycle, it is dragged by the motor and keeps rotating, it is in addition to timely pumping out the evaporator vapour, to maintain the low temperature and low pressure, but also through the compression effect of the refrigerant vapour to increase the pressure and temperature, to create the refrigerant vapour heat to the outside world to transfer the conditions of the environmental media. That is, low-temperature and low-pressure refrigerant vapour compressed to a high temperature and high-pressure state, in order to be able to condense the refrigerant vapour with room temperature air or water as a cooling medium.
Throttle element (expansion valve)
High-pressure, room-temperature refrigerant liquid is sent directly to the low-temperature scale evaporator without side ear, according to the principle of saturation pressure and saturation temperature – correspondence, reducing the pressure of refrigerant liquid, thus reducing the temperature of refrigerant liquid. The high-pressure, room-temperature refrigerant liquid goes through the pressure-reducing device – throttling element, to get a low-temperature, low-pressure refrigerant, and then sent to the evaporator to absorb heat and evaporation. Capillary tubes are commonly used as throttling elements in refrigerators and air conditioners in daily life.
Condenser
Condenser is a heat exchange equipment, its role is to use the environment cooling medium (air or water), from the cold compressor of high temperature and high-pressure refrigeration vapour heat away, so that the high temperature and high-pressure refrigerant vapour cooling, condensing into high-pressure refrigerant liquid at room temperature. It is worth mentioning that the condenser in the refrigerant vapour into the refrigerant liquid process, the pressure is unchanged, still high pressure.
Evaporator
The evaporator is also a heat exchange device. The throttled low-temperature, low-pressure refrigerant liquid evaporates (boils) into vapour within it, absorbing the heat of the cooled substance, causing the temperature of the substance to drop, and achieving the purpose of freezing and refrigerating food. In the air conditioner, cooling the surrounding air to achieve the role of air cooling, and dehumidification. The lower the evaporation temperature of the refrigerant in the evaporator, the lower the temperature of the cooled material. In refrigerators the evaporating temperature of the refrigerant is generally adjusted at -26℃~-20℃, and in air conditioners at 5℃~8℃.
What are the main uses of refrigerated trailers?
The main purpose of refrigerated trailers in the cold chain process is to keep the temperature at a low temperature, but not frozen, so that there are some food products to extend the shelf life, and so that some products do not damage and lose value.
Refrigerated trailers can be used to transport the following products:
Fruits and vegetables
Fresh meat
Hazardous goods transport
Pharmaceuticals
Cosmetics
Artwork
Electronics
What is the tolerance temperature of the refrigerated trailer?
The temperature control range of the refrigerated trailer is -18℃ to 4℃.
What is the price of a refrigerated trailer?
The price of a refrigerated trailer is usually between $30,000 and $200,000, and this price includes equipment such as refrigerated boxes and air conditioners.
What is the load capacity of refrigerated trailers?
The load capacity of a small trailer is generally between 800kg and 2500kg.
The load capacity of large trailers is from 3 tonnes to 40 tonnes.
the difference between the types of refrigerated containers
There are two main types of refrigerated containers:
Refrigerated Container
Reefer containers
How much fuel is consumed per hour?
The fuel consumption of a refrigerated trailer depends on the weight of the entire vehicle and the road environment, generally consuming 0.3 gallons to 1 gallon of fuel per hour.
Benefits of renting a refrigerated trailer
Ideal for temporary refrigeration needs, and renting instead of buying reduces the cost of refrigeration and allows you to get it quickly when you need it.
Benefits of Buying a Refrigerated Trailer
You can control the entire trailer and adjust the temperature at will, use it for a variety of purposes, and have complete control over it. It’s yours to do with as you please.
