As the core and the most expensive component in the HVAC industry, the compressor’s performance and maintenance have always been the most concerned issues for users. Now share the use of refrigeration oil in the use and maintenance of compressors. How to choose refrigeration oil 1. Refrigeration oil is equipped according to the refrigerant used…

Do you need a cold room installation or any other type of cold room solution? Energy efficiency is a basic factor to consider in all new refrigeration systems. From the original design of the system to the way it is installed, maintained, and used, the energy efficiency of the cold room can be maximized. At…

Summer is coming, which means that the cold room will be used more regularly to keep food fresh and frozen, so what should be paid attention to for its maintenance?   1. Electric power for the cold room. Because electric power is used to keep the cold room running, it is important to check the…

Expansion valve installation guide: The expansion valve must be installed in the liquid line ahead of the evaporator, with its bulb close to the suction line as close to the evaporator as possible. If there is external pressure equalization, the equalizing line must be connected to the suction line immediately after the bulb. The bulb…

Compressors play an important part in refrigeration systems condensing units, And refrigeration compressors should be properly maintained and should be inspected, and tested on a regular basis. We could meet something wrong with the compressor while using the refrigeration unit. Now, let us list some common compressor issues. 1. Compressor can’t work. Firstly check the…

Causes of Refrigerant Floodback in compressor: Refrigerant floodback in an compressor can be caused by a variety of circumstances. The majority of them may be traced back to: 1. Problems with the evaporator are number one. 2. Excessive charging and/or improperly sized capillary tubes. 3. Expansion valves that are defective or misadjusted. 4. Migration of…

The cold storage foods contain some fat, protein, and starch. So, with the presence of these nutrients, it has the possibility that mold and bacteria grow rapidly. To ensure the quality of the food, we need to clean and disinfect the cold room periodically. We can use acid disinfectant to clean the cold room. The…

We know there are four types of defrosting in the cold room: 1) manual defrost; 2) electric heater defrost; 3) hot gas defrost; 4) water defrost. Today, let us discuss the electric heater defrost type about how it runs and stops automatically? For automatic defrost control, we must mention three parameters. They are defrosted cycle,…

For the PU panel installation:   We use cam-lock systems to connect the panels in the PU panel. Before you begin connecting, double-check that the locking devices are in the correct position. To do so, turn the locking devices counter-clockwise with force, using a wrench, until they stop moving. Connect the PU panels by putting…

The protection measures for compressor There are two ways to protect the compressor：   1)  The measure to protect from a compressed liquid As we know the liquid can’t be compressed in the compressor (liquid could be the refrigerant liquid and oil). If there is too much liquid inside the cylinder, the connecting rod &…

Operating a refrigeration system – Check lists Routine maintenance and check of the cold room are necessary, and a simple inspection of the refrigeration system, including compressors, evaporators, and other refrigeration accessories, is required to ensure the long-term stable operation of the refrigeration system. Follow the checklist below if the system has been trouble-free for…

The installation standards for medical cold storage are as follows (1) Medical cold storage commensurate with its business scale and variety, and biological product cold storage shall be equipped with two or more independent cold storages; (2) Equipment used for automatic monitoring, display, recording, regulation and alarm of cold storage temperature; through the high-precision temperature…

The surface temperature of the refrigeration unit components has a normal temperature range, and it is abnormal if it exceeds this range. The factors that cause these abnormalities may be faults or improper adjustment, but they must be analyzed for their causes and eliminated and dealt with in a timely manner. These temperatures are difficult…

When the system fails, it is generally impossible to directly see where the fault occurred, and it is also impossible to disassemble and dissect the components of the refrigeration system one by one. The only way to do a comprehensive analysis is to check from the outside. Therefore, it is necessary to grasp the causes…

When the refrigeration system is running, its suction pressure has a close relationship with the condensing temperature and the circulating amount of refrigerant. For systems that use capillary tubes for throttling, the suction pressure is related to condensing pressure, refrigerant quantity, compressor efficiency, and cooling load. Therefore, when checking the refrigeration system, a pressure gauge should be…

When the refrigeration system is running, the exhaust pressure corresponds to the condensation temperature, and the condensation temperature is related to the flow and temperature of its cooling medium, the amount of refrigerant injected, the efficiency of the compressor, and the amount of cooling load. When checking the refrigeration system, you can install an exhaust…

Cold storage installation and air cooler installation When choosing the position of the lifting point for cold storage installation, first consider the location with the best air circulation, and consider the structural direction of the storage body. The gap between the air cooler and the panels should be greater than the thickness of the air…

Features of large cold storage lights The large-scale cold storage lighting uses an aluminum alloy shell, and its material meets the requirements of the GB/T 1173-1995 national standard. Using advanced “high temperature one-time die-casting” molding process, the casting product has a smooth surface, fine metal structure, no internal bubbles, sand holes and other defects. It…

As for blast freezing, we have different machines to make it. For example, spiral freezer, tunnel freezer, liquid nitrogen freezer. But most popular, it’s the plate freezer and blast freezer. So here are the differences.    1. Blast freezer For a blast freezer or air blast freezer, only the evaporator is working. It guarantees the…

The cold rooms are built-in basement where is very narrow, besides, in such small place, customer needs to separate it into 4 small one, what should be paid attention to? 1# If the basement is humid or the location nearby the sea, stainless steel for the panel is the best choice. 2# For easy installation…

When Convert the warehouse to a cold storage, a few points of attention for the reconstruction of warehouse cold storage First of all, the original building cannot be a dilapidated building or an illegal building. We must ensure the bearing capacity of the cold storage, and the ground of the cold storage must be stable.…

Some factors affecting 600 square meters of fruit juice cold storage construction charges (1) Customized juice cold storage, The cold storage is actually a custom project like the decoration of the house. First of all, we need to understand the size of your building (length, width, height) (2) What kind of juice is stored in…

Do you want to customize your walk in fridge and freezer size? PU panel Length or width?  We introduce the Chinese standards for you.   In different countries, different cold room suppliers manufacture different size PU panel widths for walk-in fridges and freezers. In China, whatever 50/75/100/120/150/200 mm panel, our PU panel width is 960mm,…

If your cold room has partition panels, you may want to know the cold room installation. It is very easy to deal with for your cold room freezer. For the biggest cold storage, there will usually be separated into several rooms. In this way, it can make the cold room get full usage and cool…

Glass door walk in cooler is cold room with big glass door for supermarket, restaurant, hotel, etc. It can have a good display effect for the inside products. Compared to the non-glass-door cold room, it has a better effect to let customers be more clear about the inside products and improve the shopping experience. Usually glass door…

Compressor oil is very important for the crankshaft. Under the serious disability of oil, the compressor could wear down within few hours. So during the installation of a split system, we should pay attention to the copper pipe. If the compressor is higher than the evaporator, the copper loop is a must. Suction line should…

Of course, we should use PU panels and PIR panels, instead of Styrofoam panels. Regarding to their difference, please refer to our previous article: What’s the difference between PIR, PUR and Styrofoam panels?   But what panels thickness should be selected? The thicker, the better, isn’t it? Our answers is no. From a chiller room, if…

The blast freezer (quick-frozen food) industry has developed rapidly. The feature of the blast freezer room： Blast freezer (quick-frozen food) usually requires relatively large refrigeration equipment. The cooling capacity of the equipment is directly proportional to the amount of quick-freezing of the food and inversely proportional to the time of quick-freezing. The Blast freezer room…

1. The diameter of the copper pipe The diameter of the copper pipe should be selected strictly in accordance with the compressor suction and discharge valve interface. When the condenser and compressor are separated by more than three meters, the pipe diameter should be increased.   2. The distance between condenser and wall Keep a…

Firstly, how seafood goes badly? At a certain temperature, the bacteria grow fast, and they will decompose the proteins, fats, and amino acids of the seafood, turns out, the seafood goes badly? And using a cold room to keep them, can maintenance at a temperature that stops the bacteria from growing. Just is like seafood…

 The replacement refrigerants for R22 – R404a   1. The biggest problem of using refrigerant R404A to replace refrigerant R22 is the problem of lubricating oil.  PVE ester oil must be used to replace the mineral lubricating oil for R22. Ester lubricants have high affinity with water and poor dehydration. Therefore, avoid contact with outside air as…

Walk in fridge is widely used around the world; one of the kinds is to be as a processing room. Customers will process different kinds of food inside, like pork, beef, chicken, fish, etc.   Procedure inside the processing room: inspect the meat -> Dry the surface of the meat -> Decompose the body ->…

Garlic cold storage, cold room for garlic How much is the construction and installation of 500㎡ cold storage for garlic? The cost of cold storage mainly depends on the three requirements of cold storage size, temperature requirements, and refrigeration unit requirements. The construction and installation costs of garlic cold storage mainly include the following points:…

When designing the cold room, we always focus on the compressor. But evaporators for cold room are also very important for the whole design. Besides a suitable cold room evaporator, which are matching the compressor. We should consider the air circulation and the evaporator dimension. A big evaporator is not always good for your cold…

Seafood Cold Storage Construction   The construction plan of the 10,000 square meters large seafood cold storage (aquatic product cold storage) cold storage is introduced in detail: Site selection: First of all, we must understand that you will build a large seafood cold storage of 10,000 square meters (aquatic product cold storage). The scale of…

When the cold room has lots of in/out each day, we should consider the leakages. So ante room is necessary. Ante room area to avoid direct infiltration of warm ambient air, and also serves as preheating chambers for stored products so they do not get wet from the condensation on unloading. When reefer containers or…

Are you doing the fruit/vegetable/beverage/seafood/poultry … business? Do you need Cold Storage or other equipment to keep fresh or frozen? And do you know the suitable cold storage temp for your food? Different food has different cold storage temp to keep fresh and long-lasting. Common food preservation cold rooms temperature is as below: Frozen food…

Now for the insulated panels, there are EPS (Styrofoam) panels, PU (polyurethane) panels, PIR (Polyisocyanurate) panels. Styrofoam panels are first generation. It’s not so good. For example, insulation, lifetime, fireproofing, strength, etc. So under the latest regulation of cold storage of China , Styrofoam panels are NOT allowed for cold room roof panels and wall…

For condensing units with compressors, there is a capacity control. Capacity control is a device that can improve the efficiency of the single stage compressor. It is based on the suction shut-off and control the gas can not flow to the individual cylinder. In 100% load operation, the compressor open all cylinder and the solenoid…

The meat cold storage is for meat, like fish, beef and pork and so on. In general, the cold storage temperature is in the -18 ~ -23 ℃, special high-grade meat freezing temperature is higher, such as high-grade beef, tuna and other freezing temperature at -35 ℃. If it is a slaughterhouse, it also needs…

Chiller room design Location: cold room in PNG It is a 15x6x2.7m cold room divided into two parts for different vegetable storage, one room requires +9C degree, the other requires +2C degree. Panel solution Wall and roof panel with 0.6mm thick BAOSTEEL brand white color plate steel. Floor panel is with 0.8m thick steel, and…

So many insulated doors, which one is most suitable for your cold room? As a manufacturer, more than 20 types cold room doors are released to the market demand. Hereby we’d like to introduce the popular models. Hinged door It’s pre-mounted on the wall panels. So installation is the most easy. For single leafs, maximum…

How to manage the cold room for frozen fish? Standard category storage We know that compared to fruits and vegetables, aquatic fish has some unacceptable flavors. Therefore, as cold storage management operators, we should not be greedy for convenience. Putting other food in the fish and meat cold storage warehouse will not only cause food…

Share one case of our customer, we make one cold room with flake ice machine for this customer. Based on his requirements, our design is 8×5.7×2.7m cold room, with 14HP Bitzer compressor, room size is -1~0C 5 tons flake ice machine Every time, our customer uses the refrigerated trucks to bring the flake ice to…

How to calculate the price for the fruit cold room? The size of the cold room should come out first, about how many square meters panels it will use, etc. Usually, the fruit cold room is designed at 0~+5C degree usually, for different purposes: logistics turnover, short-term storage, long-term storage (anti-seasonal sales). There are 4…

We all know, cold room for laboratory reagents/medicine, it needs high strict condition.  You need high quality cold room and the best design. One latest case, SUS 304 cold room (4900x2500x2700mm, with two separated rooms), 0~8C for laboratory reagents, each room equips two refrigeration units (CRYO’s units can accurate to +/- 0.1C, which can promise…