Some drivers may find that their vehicle refrigeration units have a better refrigerating effect at the first time when they buy it, but after works for a long time,maybe several months or 1 year, the transport refrigeration unit is not refrigerating well. So why this condition happened and how to solve it? Let’s see the detail reasons that may result in this bad refrigerating happening.
Bad air flow around the refrigerated truck body block the evaporator inlet
Airless is one of main reason that result in the “hot”. Usually, if there is something blocked in the evaporator inlet, then the cold air cannot blow evenly and result in the freezer in the roof of cargoes.
In one hand, it also can result in the temperature increase in some part of truck body. In other hand, some of the vehicle refrigeration units have the defrost device, when the inlet is blocked, the transport refrigeration units evaporator pipe will be frozen quickly, and the vehicle refrigeration units will turn on the defrost device automatically, and then when the temperature is up to set temp, defrost device will end, and this circle will start again and again. And it will give the condition that the vehicle refrigeration units defrost frequently.
So in order to keep a better refrigerating effect, do not block the evaporator inlet, the cargoes should not pack too high to block the inlet. When upload cargoes, leave at least 225mm height between the roof of cargo and the roof of truck body, and cargo height is not higher than evaporator inlet height.
Besides that, keep the truck body clean, do not leave paper scrap or packing paper, because the refrigeration units for trucks evaporator fans will intake the paper or scrap, then lots of dust will attached to the evaporator pipe, decrease the heat exchange rate, and the refrigerating system will not work well.
In order to keep the frozen foods fresh and decrease the food damage, it needs to be in the low temperature all the time after it manufactures, transports and delivers to customers. So how to make your truck refrigeration system in a proper situation and finish this frozen transport ideally? Let’s see this article to get more tips!
1.Cooperate the truck refrigeration system properly
The truck refrigeration is one of the most important equipment in a reefer truck, so to know how to cooperate the truck refrigeration unit rightly is the key to keep frozen cargoes safe, especially for the long distance transport refrigeration unit, drivers need to pay more attention to the truck refrigeration and transportation.
2.Preventive maintenance of the truck refrigeration system and trucks
Preventive maintenance can decrease the repair and cooperation cost and increase the truck refrigeration working life. Usually, the truck engine needs to be maintained after 10000km, and the truck refrigeration system needs to be maintained after 500-700 hours working. Take Guchen Thermo truck refrigeration system as example, after 500-700h working hours, it need to be oil filter, fuel filter and air filter; check the belt and whether refrigeration system leakage.
3.Suitable package is the key to protect frozen cargoes
For the frozen cargoes, it needs airless package, and for the fresh cargoes, it needs ventilated package. What’s more, all the package needs to be pressure proof.
4.Precool or preheat before upload frozen cargoes
Before upload the frozen cargoes, please turn on the truck refrigeration system and set the required temperature, precool or preheat for 1.5 hours, and then turn off the truck refrigeration, upload cargoes fast.
Tip: Why Precool or Preheat is Important When Upload Frozen Cargoes?
5.Check the cargoes temperature when cargoes are uploaded in the refrigerated trucks
It seems that there is a common mistake that most people may make, people always think that the truck refrigeration system can decrease or increase the cargoes temperature to the required temperature. In fact, the truck refrigeration is used to keep the cargoes temperature not decrease or increase cargoes temperature.
Tips: Why Needs to Turn off Truck Refrigeration System When Upload Cargoes?
6.Do not put the cargoes in the truck refrigeration evaporator inlet
Usually, the airless in the refrigerated truck body is main reason that result in cargoes damage, in fact, any block materials around cargoes may result in “hot”. So when upload cargoes, carefully check whether the cargoes block the truck refrigeration evaporator inlet. Keep the cargoes height is lower than truck refrigeration evaporator inlet height. If not, it will effect the temperature and even effect the truck refrigeration system working.
Tips: Why Your Truck Refrigeration System is not Refrigerating?
7.Keep the refrigerated truck body clean
Clean the truck body, and do not leave packing paper or paper scrap in truck, because it will block air flow or intake by evaporator, then effect the refrigerating system. For long time, the more impurity will be attached to the evaporator tube, and decrease the heat exchange rate. That is why some drivers think that their truck refrigeration units not refrigerating better than before.
To conclusion, keep the perishable food fresh and high quality is the main purpose of frozen food transportation, and keep low temperature condition is core, so it needs more attention and investment. So the first step for the truck drivers is use vehicle refrigeration system correctly and it is also the key point to keep cargoes quality.
Guchen Thermo as the truck refrigeration manufacturers in China, not only sell our transport refrigeration units, but also glad to share more refrigerated transport smart tips and industry news to help more people knowing cold chain transportation better.
Some smart tips that drivers should to know when they cooperate the truck refrigeration unit during the frozen transport business, for example, turn off the truck reefer unit when upload the cargoes, let’s see why should do this.
It’s know to us all that before upload cargoes, it needs to be precool or preheat for 1.5 hours in order to keep the cargoes fresh, but few people to know it should turn off therefrigeration units for trucks when upload the cargoes. So why should do this?
Reason: when after precool truck body to the required temperature, if the truck refrigeration unit is still on, and the evaporator fans are still working, the front side is positive pressure and the back side is negative pressure, so the cold air will blow from the roof of truck body, and intake much hot air into the down side of truck body, which result in the temperature is up quickly; if turn off the refrigeration units for trucks, and then upload cargoes, evaporator fans are not working, and air flow stops, the pressure is same between outside and inside of the truck body, so the outside hot air is intaken into the truck body slowly.
Do you get this smart tip? Come to use this tip when you use the truck refrigeration unit next time!
Guchen Thermo as the truck refrigeration manufacturers in China, not only sell our transport refrigeration units, but also glad to share more refrigerated transport smart tips and industry news to help more people knowing cold chain transportation better.
How to choose a reliable supplier from China?
All the international buyers have to face this question.
A good and reliable supplier can help your business walk further and work better! For years, Guchen Thermo as the supplier for many countries get a lot praise and trust from our distributors, we conclude into some smart tips for new international businessperson to tell whether it is a reliable and trustful suppliers for you. Taking Guchen Thermo vehicle refrigeration as example, let’s discuss more!
Common Ways to Find a Chinese Suppliers for International Businessperson in E-commerce Times
Mostly, lots of international businessperson will use the following ways to find Chinese suppliers:
1.Search keywords in search engine, such as Google, Being, Yahoo, Yandex... no matter which kinds of search engine, you can always find Guchen Thermo information with keywords(truck refrigeration, van refrigeration, vehicle refrigeration...) in search engine, and Guchen Thermo pages will exhibit the first page of Google Search, which proved that Guchen Thermo is authoritative and trustful.
2.Find suppliers in trade fair shows. This way is very direct and international businessperson can know more about this suppliers quality to tell whether the supplier is worth to cooperate. But for those who have no time to attend the trade fair show, they won’t have this way. Of course, businessperson can also find Guchen Thermo in the HVAC related famous trade fair show, such as that, CIAAR, Bus Word, IAA... in the trade fair show, we will exhibit the newest truck refrigeration and van refrigeration for people to visit.
3.Find suppliers in B2B. the best B2B in China is Alibaba, many of international businessperson will find Chinese suppliers in Alibaba. Guchen Thermo also has shop in Alibaba, you can also find us there.
Smart Tips to Find a Reliable Chinese Suppliers
No matter which ways you find a Chinese suppliers, you should know the following smart tips to tell whether it is worth to cooperate.
1.Detailed and completed information：
As for a reliable supplier, they always have the detailed information including in:
A. Clear, detailed and real product photos
Product photos are one of the important standard to tell a reliable supplier, they always have 3 or more product photos, detailed product photos with the clear company watermark, it proved that this products photos belongs to the supplier not embezzling others. For example, all of Guchen Thermo truck refrigeration and van refrigeration products photos or installation photos have the clear our company watermark.
B.Product price
One of the most important buyers care for is price. Of course, everyone wants the lowest price but please care for that If you find the price is extremely below than the normal price in the market, think twice whether it is trustful. Many fraud suppliers will take the thought of gaining petty advantages, to let the buyers cheated. For example, Guchen Thermo truck refrigeration unit price and van refrigeration unit price is low but normal price, or to say, affordable price, low price is just compared with other famous brands vehicle refrigeration, but not extremely low, because the high quality not permit the extremely low price.
C.Product information
Detailed product information can also indicate the trustful suppliers, the more detailed, the more better. All of Guchen Thermo truck refrigeration and van refrigeration has the detailed information and PDF document for each products in our website. And for the shipment charge, you can also contact our sales person, because different countries, and different transport way will have different charge, these charge is transparent.
2.Good company website: the company website can indicate many things.
A. Normal and registered company will care for their company website image. They will have a higher standard to the website technology, to give visitors a best experience in their website. Fraud companies don’t have a company website or their website is rough and only have one or two simple pages, give visitors a unpleasant experience at the first time.
B. Normal and registered company will leave their detailed contact information in website, including address, email, phone number, fax number... and it can be found in the search engine. Fraud companies will not leave detailed contact information, or only leave a phone number, but unclear company address.
In a word, the above are some tips for reference, not the absolutely right ways to tell whether fraud or reliable suppliers, for the reality conditions, buyers should connect the physical truth. This is the E-commerce Times, this is the best times, and also worst times. E-commerce makes many chances, but accompanied with risk, so international businessperson should learn to gain the sharp eyes to distinguish right from wrong.
