Commercial Freezer Room

Commercial Freezer Room is very the efficient storage facility for frozen products such as frozen meat, frozen seafood, etc. Foods can be kept for a long time with the help of commercial freezer room, it is very helpful for fresh food business development. Some customers want to cool down the temperature of commercial freezer room quickly within a regular time. But it needs time, let me list some reasons for that.




1. PU sandwich panels of commercial freezer room don’t work well

Firstly the thickness of PU sandwich panel for the commercial freezer room is not thin enough, so the insulation effect is poor. Secondly the density of PU sandwich panel is not enough. If frost occurs in the seal of commercial freezer room door, it means that seal is not tight. In addition, frequent switching of commercial freezer room doors or more people come into and go out from the commercial freezer room will also increase the cooling consumption, so let’s try to avoid opening the door frequently. If large quantity products are loaded into the commercial freezer room, the thermal load increases sharply. The commercial freezer room needs to take a long time to cool down to the specified temperature.




2. The frost of the evaporator is serious, or dusty is excessive, the heat transfer effect will reduce.

Because the evaporator temperature of commercial freezer room is lower than 0℃, and the humidity of commercial freezer room is high, the moisture in the air is easily frosted on the surface of the evaporator, which affects the heat transfer effect . To prevent more thicker frost on the fin surface of evaporator, we need to set defrost time periodically.

3.There is much air or frozen oil in the evaporator, the heat transfer effect will reduce.

Once inner surface of the evaporator heat transfer tube is attached with much frozen oil, the heat transfer coefficient will be reduced. Similarly, if there is much air in the heat transfer tube, heat exchange area and heat transfer is reduced, so commercial freezer room temperature will cool down slowly. Therefore, in daily operation and maintenance, we should remove the oil and exhaust the air in the evaporator in time to improve the heat transfer efficiency of the evaporator.




4. The throttle valve is improperly adjusted or blocked, the refrigerant flowing rate is too large or too small.

If the opening degree of the throttle valve is too large, flowing rate of the refrigerant will be too large, the evaporation pressure and evaporation temperature will increase, so commercial freezer room temperature will cool down slowly; Meanwhile, if the throttle valve opening degree is too small or blocked, flowing rate of the refrigerant will be reduced, the cooling capacity will be reduced, so commercial freezer room temperature will cool down slowly. Generally, we could judge whether the flowing rate of the throttle valve refrigerant is appropriate by observing the evaporation pressure, the evaporation temperature, and the frosting condition of the suction pipe. Blockage of the throttle valve is an important factor affecting the flowing rate of the refrigerant. The main reasons for the blockage of the throttle valve are ice blockage and dirty blockage. Ice blockage is due to the poor drying effect of the dry filter, refrigerant contains moisture, when it flows through the throttle valve, it drops negative temperature, the moisture in the refrigerant becomes to be ice and blocks the throttle hole; Dirty blockage is due to the accumulation of more dirt on the filter inlet of the throttle valve, so the refrigerant flows poorly, it caused dirty blockage.

5. Refrigerant is not enough in the system, cooling capacity is poor.

There are two main reasons for the insufficient refrigerant circulation. Firstly, the refrigerant charge is not enough, in this case, we just fill in sufficient refrigerant in system. Secondly, the refrigerant leaks seriously in the system, in case of this situation, we need to find the leakage point and seal it soon.

6. Low efficiency of compressor, the cooling capacity can’t meet the commercial freezer room load requirements

Due to the long-term operation of the compressor, the components such as the cylinder liner and the piston ring are severely worn, the gap is increased, the sealing performance is reduced accordingly, the gas transmission coefficient of the compressor is also reduced, so the cooling capacity is reduced. When the cooling capacity is less than the heat load of cool room, temperature will cool down slowly. We could observe the suction and exhaust pressure of the compressor to judge refrigeration capacity of the compressor. If the refrigeration capacity of the compressor drops down, the common method is that replacing the cylinder liner and piston ring of the compressor, If it can’t be effective after replacement, we need to disassemble and repair it.





Onlykem is not only provide best quality cold room and refrigeration unit products and solutions but also installation and service for secure and reliable lifetime operation. Welcome contact us for detailed information and suggestions.

OnlyKem CFC Free Cool Room Panels

Cool Room Panels are also called cold room panels in which polyurethane foam are been sandwiched between the two outer covers. OnlyKem CFC free cool room panels are commonly used for cold room construction due to its advantageous mechanical, chemical, biological and moisture properties, Our high quality coolroom panels are excellent to prevent thermal conductivity, restrain growth of fungi, keep out moisture ingress. Onlykem is the important cool room panels manufacturers in China.
OnlyKem CFC Free Cool Room Panels specifications

NO	Item	Specifications
1	Density of panel	42kg/m³
2	Thickness of PU panel	75mm,100mm, 120mm,150mm,180mm,200mm optional
3	PU Panel Connection	Cam-lock connection
4	Surface steel	Color galvanized steel or stainless steel
5	Thickness of color steel	0.426mm,0.45mm,0.5mm
6	Color	White(Optional)
7	Fire resistance grade	B1/B2
8	Foam time	30-40minutes
9	Insulation material	polyurethane(CFC free)

Cool Room Panels Production Process

The main cool room panels production process includes 6 steps.

Step 1, put the bottom steel plate, the support, the cam-lock in sequence.

Step 2, put the top steel plate and fix them together.

Step 3, put the insulation (polyurethane) material into this outer casing and then waiting the material to be frozen.

Step 4, PU panel polishing.

Step 5, Film protection and customized package.

Step 6, Uploading and transporting.

All our cold room panels production process are finished in the production line.








Cool Room Panels Production Fatures
Lightweight and modularized.
High mechanical durability.
Less construction cost.
Perfect isolation attributes.
Good thermal preservation.
Water proof, sound proof.
Energy saving and fire resisting.
Competitive in price.
The coated layers are available in profile with zinc coated, galvanized steel, embossed aluminum and stainless steel etc.
The EC/USDA international hygiene standards.

OnlyKem Pu Panel factory is equipped with automatic production lines. We had 12 years of experiences of manufacturing PU Panels with daily output up to 3,000 square meters. Welcome to visit our factory.
About OnlyKem

OnlyKem Technology Co., Ltd is one of the leading cold room and freezer room designer and manufacturer in China, who has more than 10 years industrial experience. We had provided many types of effective and states of the cold room and key parts to over 36 countries. We are not only manufacturing best quality cold room products but also providing professional cold room and key parts design and installation service. OEM, ODM, custom design and fabrication are also available.

If you have any questions or inquiries, please contact us at sale@coldroomplus.com we will reply as soon as possible

Mini Cold Room

Mini Cold Room generally adopts the eccentric hook connection or the field foaming fixation of the embedded parts inside the plate wall. Our mini cold room has characteristics of good sealing, easy loading and removal, small amount of construction and installation, labor saving, good quality and quick effect. Mini cold room is equipped with advanced refrigeration units that can match the cold storage capacity. Our mini cold room features fast cooling speed, energy saving, automatic controlling system, safe and reliable operation. Mini cold room is suitable for a wide range of cold storage temperature range of -40 ℃ to 20 ℃ which can meet the needs of different uses. It is suitable for use in various industries and departments.



Characteristics of Mini Cold Room
The operation is simple, the volume is small, also it can move flexibly, convenient, etc.
The price is low and the operating cost is much lower than that of other refrigeratory stores.
A composite library board with the most advanced insulation material, polyurethane, as the core material for the small cold storage. Professional technology and excellent material selection to ensure that the system is more reliable. Inside and outside the cold room, we can select rigid polyurethane insulation sandwich panel with color steel plate, stainless steel plate, embossed aluminum plate and so on. T-plate, wall board, corner panel combined cold room can be assembled in any space, also can be made into a variety of lengths, specifications, to meet the different requirements of the majority of users. The door lock is equipped with a safe unlocking device, which can be opened even after the door lock, which effectively ensures the safety of the operator.
The main parts of Mini cold room are international famous brands, which ensure the reasonable collocation, smooth operation, good insulation performance, low energy consumption and excellent quality.
The size of Mini cold room, the storage temperature, the location of the unit, the opening of the door, the layout of the store, etc., all these can be customized according to the specific requirements of the user.
Advantages of Mini Cold Room

Because of its flexibility, short construction period, superior energy-saving effect, Mini cold room is more and more popular with users. It is the best choice to replace civil cold storage. The storage plate is filled with drawbars, which has good air tightness and heat insulation. Room body integration, with a good degree of steel, is the most advanced large-scale ultra-low-temperature storage.

The use of cold storage for a long time has a lot to do with daily maintenance, what are the methods of cold room maintenance? It is necessary to know some of this knowledge!

PU panel
PU panel is B2 fireproofing grade, B2 is best grade for keeping best insulation effect and safety.
Cam lock, very easy to install.
40-42 kg/m3 high density PU foam, It will influence the cold room life time. It can keep cold room lifetime to 20 years at least.

4.PU panels thickness: 100mm, 120mm, 150mm, 200mm. Width are 960mm or 1000mm(standard). Outer layer are color steel, stainless steel plate, thickness are 0.426mm, 0.5mm, 0.6mm or thicker .




Hinged Door
Mini cold room door size can be customized.
Window on the door, glass door and PU panels door.
Eescape device system protects people safety.
Hinges and locks are stainless steel.

Condensing Units Brand

Bitzer, Copeland, Danfoss, etc. Quality is absolutely guaranteed.







Selection of Compressor and Evaporator for Mini Cold Room

The capacity of mini cold storage is generally less than 5 tons, the refrigerant is mostly R404a. The low-temperature storage is semi-closed compressor, and the high-temperature storage is mostly closed compressor. Cold storage evaporator can be used by pipe or cold-air machine.
Mini cold room price/cost analysis

Mini cold room is a long-term customer-made cold storage style, the prices are also of particular concern. In fact, there is no accurate price, the so-called mini cold room prices are businesses accounting costs according to customer configuration requirements.

For example, if you want to build a mini freezer with an area of 2*2*2m to storage seafood and meat , voltage is 380, PU panel thinckness is 120mm, 2HP compressor, generally the price is less than $3000.

Like a fruit and vegetables storage for 2 meters long, 2 meters wide, 2 meters high Mnini cold room, the price is around $2000.

Customers are best to choose a reasonable price and good after-sales cooperation, because we do mini cold room not only to save costs, more importantly, can also enjoy good after-sales service.

OnlyKem Technology Co., Ltd.

OnlyKem Technology Co., Ltd. is the pioneer and leader of the refrigeration industry. Production and export of cold room and refrigeration equipment for more than 20 years. Our innovative, high quality products and solutions include Mini Cold Room, Walk In Cooler, Walk In Cooler Panel, Unit Cooler, Condensing Unit, etc. Product innovation and customer satisfaction are our long term commitment to all our partners.

So why not choose us? We are satisfied with all your expectations. Welcome to consult! please contact us at sale@coldroomplus.com, we will reply as soon as possible.

Cold room systems

Cold room systems are basic facilities for cold storage in commercial and industrial food business, pharmaceutical field, seafood business, poultry business and some other fields. Some users know little the correct operation of cold storage room, so sometimes it will cause high power consumption, sometimes it has potentially dangerous. How to operate cold room systems correctly is very important for cold room users, it can extend its lifetime and guarantee its safety if you use or operate cold room systems correctly. The followed are some suggestions on how to operate cold room systems correctly and how to keep routine cold room maintenance. We hope these suggestions are helpful for you!
1. How to use the doors of cold room systems properly?

In order to prevent the damage of cold room doors, please open or close doors lightly.

In order to prevent the leakage of cold air, please kindly close the cold room doors quickly. If we open the cold room doors for a long time, outside hot air will enter inside of room, caused severe frost of fins, then it will have bad cooling effect.




2. How to display products properly in the cold room systems?

When we display goods in cold rooms, don’t block the suction or exhaustion port of the evaporator, please keep the suction or exhaustion port be always open, and distribute the cooling air evenly. In order to make cold air distributed well, the left, right, up and down of the goods should be 5cm distance from each other.

We often see that the suction inlet is blocked by the goods, which will reduce the intake of cold air, resulting in decrease of cooling capacity and damage of the goods.



3. Don’t put goods on top of the cold room ceiling

The ceiling panel of cold rooms is designed as non-load-bearing, and there are some refrigerant piping and electrical wiring layouts. Users are not allowed to stack goods on cold room ceiling panels in order to avoid accidental damages.



4. Keep the condenser be clean and smooth always

Poor ventilation caused high operating temperature, it will shorten the lifetime and increase energy consumption. We should keep condenser fins clean and smooth always.



5.Tips on old room defrosting:

Cold room defrosting is automatic defrosting with electric heating. When the humidity is high in summer, it is easy to freeze for the evaporator, please do not hit ice cubes with hard items, which may cause the leakage of the evaporator coil. The correct method is using warm water to remove ice cubes or increasing defrosting times appropriately



6.Maintenance and repair for the compressor:
The freezing oil level is between the upper and lower limits of the oil monitor, and the oil is not cloudy.
Using liquid sight glass to check the refrigerant charge.
3.Check the compressor oil level.
4. Check the compressor crankcase heater operation.
5. Check the main power supply and control voltage.
6. Check the appearance of the condensing
7. Check the system pressure.
8. Check the cooling system, if it has leakage.
9. Check the suction filter and liquid drying filter.
Check that all bolts, fittings and piping clamps are tight.
Inspect the condenser fan blade paddles and motor assembly for cracks, loose screws, or connection bolts.
12. Check the suction / exhaust / liquid refrigerant pressure and temperature.
13. Check the compressor’scurrent, over-heatdegrees, liquid over-cold degrees and ambient temperature.