Cold storage, acid discharge workshop air conditioning cooler purchase common sense

‌ We build冷库Or supporting the workshop air conditioning, in the high temperature area and low temperature area, will be designed to use chiller。Thermal and power engineering制冷The principle is Putron制冷One of the four components of the system (制冷主机，condenser, throttle device, evaporator)。Chiller genres will also be used according to design制冷The medium, habitually divided into fluorine制冷Fan, ammonia refrigeration fan, ethylene glycol (refrigerant) refrigeration fan。我们冷库When the practitioner gives you the quotation of the fluorine refrigeration fan, it will write DL, DD, DJ with a number behind it, and the number represents the heat exchange area, such as DD-100.What do you mean。General first letter D, is the meaning of Chinese Pinyin ceiling。There are generally floor chiller, the first letter is L。

The second letter is cold refrigeration using classification, such as Pinyin D stands for low temperature refrigeration。This brings us to common fluorine制冷According to the use of the fan is divided into cooling and refrigeration, low temperature refrigeration, low temperature freezing, according to the pinyin is DL, DD, DJ。Ammonia chillers add A (pinyin abbreviation for ammonia) to the model, such as KLA-300, to cool ammonia at high temperatures制冷Fan, cold area 300 square。Of course, in this respect, each manufacturer is not the same, you can consult the product description, but the air cooler is the most important片距Must understand。

What is the pitch？We know，The chiller is a forced evaporator，Originally designed to increase the heat transfer area，The size should be as small as possible，Then it is necessary to solve the heat exchange tube as short as possible，Design engineers invented fins，The heat transfer area of a single heat exchange tube is increased by 2-4 times or even more，但，Both evaporator condensers need to circulate with air，Dirty stuff involving the air，Like dust.，油污。冷库The fan involves frost formation, which affects heat transfer and is completed in the agreed period制冷Without affecting the passage of air, it is necessary to consider the spacing between the fins。Therefore, there is an indirect fan type according to the fin spacing。At present, the distance between the evaporator fins (or condenser) of the common chiller is 4mm and 4.5mm, 6-8mm, 10mm, 12mm, 16mm, 20mm。At present, with the deepening of the design, some quick-freezing fans have begun to choose frost-free fans with a sheet distance of 20mm. We are a professional cold storage solution provider in Harbin. You can contact us to provide professional guidance and technical consultation on the installation and maintenance of cold storage。

Note: The chiller is divided intoEqual pitch和Unequal pitch(Large inlet wind side, small outlet wind side, such as 8-16, etc.) two kinds。Selection criteria are: small fin spacing, suitable for high temperature environment。The fin spacing is large, suitable for low temperature environment or frozen environment。冷库The lower the temperature, the larger the fin spacing required。If the selection is not reasonable, the fin frost speed is fast, and it will soon block the wind channel.冷库It's hard to cool down,制冷Compressor efficiency can not play out, resulting in制冷The power consumption of the system increases。
Common sheet spacing options, combined with different options for frozen refrigerated goods are as follows:
1, the general design of 0℃-20℃ cold storage or acid discharge room, such as low temperature air conditioning slaughtering or production workshop, cool storage, cold storage hall, fresh storage, air conditioning storage, maturing storage, etc., choose the chiller with a slice spacing of 4-10mm。
2, the general design of -2 ° C ~-23 ° C environment, such as low temperature freezing and refrigeration, low temperature logistics warehouse, the selection of the blade distance of 6mm-12mm chiller。
3, the general design of -23 ° C ~-35 ° C frozen warehouse, generally choose the blade distance of 10-20mm or unequal blade distance chiller。



Of course it's all thatSnow dragon refrigerationBasic pitch range for the salesman, but冷库Design to change to seek stability, teaching according to aptitude。Snow Dragon Refrigeration will confirm with you in advance冷库Use conditions and product application characteristics are different and choose different blade spacing fans。Sheron refrigeration will confirm the sheet spacing and parameters with the supporting factory to solve your problems, these, you do not have to worry。Poor choice will cause slow cooling, defrosting cycle and number of increases, increase the cold storage operation energy consumption, which is not consistent with the 14th five-year national cold chain planning energy saving and consumption reduction。

　　Precautions for installation and maintenance of cold storage air coolers

Check before installation:

1.After opening the outer package of the cold storage air cooler, check whether the components are loose, and tighten them again if they are loose。
2.Check whether the blades of the axial flow air are firmly installed on the motor shaft, and whether the blades and the protection collide。
3. If the chiller is damaged or deformed due to transportation, it should be repaired before hoisting。
4. The chiller is provided with nitrogen pressure and capillary seal before leaving the factory。Before installation, remove the sealing capillary tube. If there is a sound signal of air flow, the evaporation tube of the chiller is well sealed and can be used with confidence。If there is no airflow soundevaporatorPipe leaks should be inspected during installation。

5.When there is no design drawing, the distance between the installation of the suspended ceiling chiller and the wall (fan diameter of 400mm or less) should be maintained at 350-500mm, and the wind is conducive to cold air冷库Internal circulation flow and overhaul。If the design drawings are available, install them according to the dimensions of the design drawings。
6.The chiller drain pipe leads to冷库There should be a certain slope outside, so that the defrosting water can be smoothly discharged out of the warehouse。If necessary, such as the air conditioning warehouse should consider the drainage U-bend water seal。
7.大型冷库Or when the storage temperature is lower than -20 ° C, an electric heat pipe should be added in the defrosting drainage pipe to prevent the defrosting water from freezing and blocking during the discharge and drainage process。
8.When installing the expansion valve, the temperature sensing bag must be tightly tied to the upper part of the horizontal return pipe and in good contact with the return pipe. Moisturize the outside of the return pipe to prevent the temperature sensing bag from being affected by the reservoir temperature。
9.When installing the chiller, it is necessary to consider that the outlet should avoid opening the beam or column, so as not to affect the air supply range。
10. The type D Freon suspended ceiling type chiller gas junction box is designed on the left side of the front of the chiller，The junction box is divided into two specifications below 22㎡ low power defrosting electric tube terminal，The second type of chiller defrosting electric heat pipe terminal above 30㎡ adopts Y connection method，Due to the unbalanced load of the three-phase electric heat pipe，Therefore, the neutral cable must be connected to the user，In addition, if one phase of the heat pipe overheats and burns, it will not lead to overload of the other two phases of the heat pipe。
11. According to the range of the chiller, the chiller should be appropriately arranged to ensure that the air supply in the library is uniform without dead Angle。




Check during operation and maintenance:

1. Check the low temperature冷库When running, the electric heating and the fan can not run at the same time, that is, when the defrosting electric heat pipe is connected, the fan motor power supply must be disconnected to prevent the hot air blowing into the warehouse during defrosting。The design of automatic storage in winter except for the storage。
2. The defrosting cycle is automatically accumulated by the computer control box, and the customer should adjust the defrosting cycle and defrosting time according to the defrosting situation of the chiller according to the frequency of incoming and outgoing shipments and stored items。Defrosting can be done manually or by activating the defrosting control circuit if necessary。
3. When defrosting ends, the chiller fan cannot be started immediately to prevent freezing of the chiller fins。
4. It is necessary to check regularly whether the fan, defrosting function is normal, whether the cold air machine is normal, and regularly clean the frost layer of the fin制冷效果。