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Stainless steel cold room panels are insulated building materials used to construct cold storage rooms such as walk-in freezers, refrigerators, or temperature-controlled clean rooms. These panels are specifically designed to maintain low temperatures efficiently and hygienically.

Stainless steel cold room panels are typically sandwich panels with three layers:

1. Outer layers (skins):

   • Made of stainless steel, usually 304 or 316 grade

   • Corrosion-resistant, durable, and easy to clean

   • Suitable for environments with strict hygiene requirements

2. Core insulation:

   • Usually Polyurethane (PU) or Polyisocyanurate (PIR)

   • High thermal insulation to maintain low temperatures inside the room

   • Sometimes EPS (Expanded Polystyrene) is used as a budget option

Stainless steel cold room panels will be exported to Singapore.

Panels for making refrigerated truck body.

We will ship XPS Panels and materials to Mauritius.

As the leader in refrigeration technology, we aim to bring you high quality, reliable, long lasting and excellent efficiency products. We had exported many types refrigeration products and cold rooms to Australia, USA, Malaysia, Singapore, Philippines, Indonesia, Kenya, Ghana, Nigeria, Mozambique, Mauritius, Rwanda, Chile, Peru, Lebanon, Jordan, Bahrain, etc.

Bitzer screw compressor rack unit for blast freezer system

Advantages:

• Energy Savings: The screw compressor design inherently provides higher efficiency compared to reciprocating compressors, especially under variable load conditions.

• Capacity Control: Slide valves and variable speed drives (VSDs) allow precise control, reducing energy consumption during partial load operation.

Bitzer screw compressor rach unit includes, compressor, oil separator, liquid reservoir, Economizer heat exchanger, oil cooler, accumulator ect.

We will ship this Bitzer screw compressor rack unit to Chile.

Our factory advantages:

1, Leading refrigeration technology
Special R&D development and strong ability:
More that 10 technology patents in refrigeration application;
Supply technical consulting service;

2, Professional certified employee
Refrigeration major and operation certificate of machinery.

3, More than 25 years factory experience
Itis the leading factory of refrigeration equipment;

4, professional whole line of production
With advanced equipment and technology, we have complete production management, quality control, and after-sale service system;

Choosing the right cold room refrigeration units is important because the refrigeration units are the heart of any cold room They play a vital role in maintaining the temperature and ensuring the preservation of goods stored inside the cold room. The refrigeration units directly impact the functionality, energy efficiency, safety, and operational costs of the cold room.

Here’s a step-by-step guide to help you select the best cold room refrigeration units:

Types of cold rooms
There are various types of cold rooms depending on their application, size or configuration.

Application
Depending on their application, cold rooms can be used as working rooms, pre-cooling rooms, product preservation rooms or freezing rooms. Depending on the type of product to be preserved, the cold room will have certain climatic conditions, temperature and humidity controlled so that the product does not lose its properties. In general, if we differentiate cold rooms according to the operating temperature range, we find high, medium and low temperature cold rooms, and freezing cold rooms.

Size
If we differentiate the cold room according to its size, we find small, medium and large cold rooms.

Depending on the application or the operating temperature range of the cold room, we have: high and medium temperature cold rooms to preserve fresh products between 0 and 18ºC; low temperature or negative temperature cold rooms to preserve products between -28º and 0ºC; and freezing tunnels with temperatures of -30ºC.

Choose the Type of Cold Room Refrigeration Units

Based on the cooling load and application, you can choose from the following types of refrigeration units:

• Monoblock (Self-Contained) cold room refrigeration units:
• 

• • Ideal for small cold rooms or low-capacity applications.
  • Easy to install and maintain.
  • Suitable for temperatures around 0°C to -10°C.
• Split cold room refrigeration units (Remote Condensing Units):
• 
  • Consists of separate evaporator and condensing units.
  • Suitable for larger cold rooms.
  • More efficient and quieter as the compressor is located outside the cold room.
• Centralized cold room refrigeration units:
• 
  • Used for large cold storage facilities with multiple rooms.
  • More complex and requires professional installation.
  • Offers better energy efficiency for large-scale operations.
• Direct Expansion (DX) refrigeration units:
  • The refrigerant directly evaporates inside the evaporator coil, cooling the air.
  • Suitable for medium- to large-sized rooms.
• Ammonia (NH₃) or CO₂ refrigeration units:
  • Preferred for larger, industrial-sized cold rooms due to their energy efficiency and ability to handle larger loads.
  • Ammonia systems require specialized knowledge and safety precautions.

4. Select the Refrigerant Type

The choice of refrigerant impacts efficiency, environmental impact, and cost. Common refrigerants include:

• R-22 , R-134a, R-404A, R507 a, R-290 (Propane), R717 and CO2

5. Evaluate Energy Efficiency

• Choose the refrigeration units with a high Coefficient of Performance (COP) to reduce energy consumption.
• Look for energy-efficient refrigeration units certified with Energy Star or similar certifications.
• Ensure the system has a variable speed drive (VSD) compressor to adjust to load changes and improve energy efficiency.

6. Consider Environmental and Regulatory Factors

• Environmental Impact: Opt for systems using low Global Warming Potential (GWP) refrigerants, such as R-290 or CO₂.
• Regulations: Ensure the system complies with local standards and regulations (e.g., energy codes, refrigerant handling rules).

7. Assess Maintenance and Serviceability

• Choose a refrigeration unit with easy access to parts and services.
• Regular maintenance is key to keeping the system running efficiently, so ensure that the manufacturer or supplier provides good after-sales support.
• Consider the complexity of the system and whether you have in-house maintenance capabilities.

8. Budget Considerations

• Initial Cost: Evaluate the upfront cost of the refrigeration units, including installation, components, and accessories.
• Operating Cost: Consider the long-term energy costs, including electricity consumption and the expected lifespan of the system.
• Maintenance Costs: Account for routine servicing and potential repairs.

9. Consult with an Expert

• If you’re unsure about the best choice, consult with a refrigeration contractor or engineer who can help with system design, load calculations, and equipment selection.

By considering these factors, you can select the correct refrigeration units that will meet your cold room’s specific requirements, be energy efficient, and offer reliable performance over time.

Our factory produces complete range of Cold room refrigeration units with all types of Compressors i.e. Bitzer, Danfoss, Bock, Frascold and Copeland. As the leader in refrigeration technology, we aim to bring you high quality, reliable, long lasting and excellent efficiency products. We had exported many types refrigeration products and cold rooms to Australia, USA, Malaysia, Singapore, Malaysia, Philippines, Indonesia, Kenya, Ghana, Chile, Peru, Lebanon, Jordan, Bahrain, etc.

PIR (Polyisocyanurate) cold room panels are insulation panels commonly used in the construction of cold rooms, freezers, and refrigerated storage facilities. These panels are known for their excellent thermal performance, which helps maintain consistent temperatures within the cold room while minimizing energy consumption.

PIR panels consist of a rigid foam core (polyisocyanurate) sandwiched between two layers of durable materials such as metal, typically galvanized steel, aluminum, or stainless steel. The core material has a low thermal conductivity, making it an effective insulator.

We will ship Cold room PIR panels to Singapore.

We aim to bring you high quality, reliable, long lasting and excellent efficiency products. We had exported cold storage panels and cold rooms to Australia, USA, Malaysia, Singapore, Malaysia, Philippines, Indonesia, Kenya, Ghana, Chile, Peru, Lebanon, Jordan, Bahrain, Saudi Arabia, Nigeria, Mozambique, Mauritius, Costa rica etc.

Cold storage room, as an indispensable part of modern cold chain logistics, its composition and operation principle are crucial to ensure the safety and quality of food, medicine and other items.

1. Components of cold storage room

Cold storage room is mainly composed of the following parts: insulation panles, refrigeration system, electrical control system, auxiliary facilities, etc.

1. Cold room insulation panels

The sandwitch panels are the main structure of the cold storage, and its design and construction quality are directly related to the insulation effect and operating cost of the cold storage room. At present, the common insulation materials on the market are polyurethane, polystyrene, etc. They have good insulation performance and low thermal conductivity, which can meet the use requirements under different temperature and humidity conditions.

2. Refrigeration system

The refrigeration system is the core part of the cold storage room, which is responsible for discharging the heat in the room and maintaining the stability of the temperature in the storage. The refrigeration system is mainly composed of compressors, condensers, evaporators, throttling devices and other components. Among them, the compressor is the “heart” of the refrigeration system. It compresses the refrigerant and changes it from a low temperature and low pressure state to a high temperature and high pressure state, providing power for the refrigeration cycle. The condenser is responsible for cooling the high-temperature and high-pressure refrigerant discharged from the compressor, turning it into liquid and releasing heat at the same time. The evaporator uses the latent heat of vaporization of liquid refrigerant at low pressure to absorb the heat in the storage to achieve a cooling effect. The throttling device ensures the efficient and stable operation of the refrigeration system by controlling the flow and pressure of the refrigerant.

3. Electrical control system

The electrical control system is the “brain” of the cold storage room. It is responsible for controlling the operating status of the cold storage room and ensuring the safety and energy saving of the cold storage. The electrical control system is usually composed of components such as temperature controller, pressure controller, motor protector, and power distributor. Among them, the temperature controller is the core of the electrical control system. It automatically adjusts the operating status of the refrigeration system according to the changes in the temperature in the storage to ensure the stability of the temperature in the room. At the same time, the electrical control system also has fault diagnosis and alarm functions, which can detect and handle equipment failures in time to ensure the safe operation of the cold storage room.

4. Auxiliary facilities

They provide necessary support and guarantee for the normal operation of the cold storage. Auxiliary facilities include lighting systems, ventilation systems, drainage systems, fire protection facilities, etc. Among them, the lighting system provides the necessary lighting conditions for the cold storage, which is convenient for personnel to operate and maintain; the ventilation system ensures the air circulation in the cold storage to prevent the items from being damaged due to excessive humidity in the storage; the drainage system is responsible for discharging the accumulated water in the storage to prevent the accumulated water from damaging the equipment; the fire prevention facilities improve the fire prevention ability of the cold storage room and ensure the safety of the cold storage room.

Maintenance of the cold storage room

In order to ensure the normal operation of the cold storage room and extend its service life, the cold storage room needs to be regularly maintained.

1. Regularly check the operating status of the refrigeration system to ensure the normal operation of the equipment.

2. Clean the condenser and evaporator regularly to prevent dust and dirt from affecting the heat dissipation effect of the equipment.

3. Check the operating status of the electrical control system regularly to ensure that the control system works normally.

4. Check the use of auxiliary facilities regularly, such as lighting systems, ventilation systems, etc., to ensure their normal operation.

5. Defrost the cold storage regularly to prevent the frost layer from being too thick and affecting the refrigeration effect.

An onion cold storage room is a controlled environment specifically designed to store onions in a way that preserves their quality and prolongs their shelf life. Onions are sensitive to temperature, humidity, and light, and improper storage can cause them to sprout, decay, or lose flavor. A cold storage room helps prevent these issues by maintaining the ideal conditions for long-term storage.

Storing onions in a cold storage room is a common practice to prolong their shelf life and maintain their quality. However, onions require specific conditions to avoid sprouting, spoilage, or softening. Here are key considerations for onions in cold storage room:

Onions cannot be stored immediately in cold storage room after the harvest. First, onions need to be dried for a few days. Then starts the maturing stage that enables skin and colour formation specific to the onion cultivar. Onions are prepared for cold storage room by lowering the temperature at maximum by 0.5 °C per day to reach the ideal cold storage temperature little by little. Depending on the onion variety, they are stored at between 0 °C and +2 °C in cold storage room. Onions can be stored in cold storage room up to ten months without deterioration. Ventilation is vital in onion storage. After storing, onions are not transported straight from the cold storage room before they are put on the market, but heated in temperature-controlled conditions in order to prevent condensation.

1. Temperature control
Onions are best stored at low temperatures, and the recommended temperature is between 0°C and 4°C. By precisely controlling the temperature of the cold storage room, the shelf life of onions can be extended.

2. Humidity regulation
Onions have high requirements for humidity, and the appropriate humidity range is 65% to 70%. Maintaining an appropriate humidity level in the cold storage room can reduce the water loss of onions and extend their shelf life.

3. Ventilation and preservation
Good ventilation can effectively remove carbon dioxide and ethylene gas inside the cold storage room, slow down the metabolism of onions, and extend the shelf life. At the same time, ventilation also helps to maintain the humidity balance inside the cold storage room.

4. Moisture-proof treatment
Onions are easily affected by moisture and rot, so moisture-proof treatment should be paid attention to. When storing onions, use packaging materials or mesh bags with good air permeability to avoid direct contact with the ground to prevent moisture intrusion.

5. Partition storage
Onions can be stored in cold storage room according to the type and maturity of onions. Storing onions with higher freshness separately from mature onions is conducive to extending the shelf life of fresh onions.

6. Regular inspection
Regularly inspect the storage status of onions and remove rotten or spoiled onions in time to prevent rotten onions from affecting the surrounding healthy onions.

Onion cold storage rooms are commonly used by farmers, distributors, and grocery stores to extend the shelf life of onions, especially when they are harvested in bulk or stored for distribution during off-seasons.

As the leading cold room manufacturer, we provide one stop cold room refrigeration solution including cold room panels, cold room doors, condensing unit, evaporators and condensers, and ice making machines.

Our factory produces complete range of Refrigeration Systems with all types of Compressors i.e. Bitzer, Danfoss, Bock, Frascold and Copeland. As the leader in refrigeration technology, we aim to bring you high quality, reliable, long lasting and excellent efficiency products.

We had exported many types refrigeration products and cold rooms to Australia, USA, Malaysia, Singapore, Malaysia, Philippines, Indonesia, Kenya, Ghana, Chile, Peru, Lebanon, Jordan, Bahrain, etc.

Due to the changeable environment of the cold room and the harsh operating conditions, with the complex structure of the refrigeration system, its operation failures are frequent, which not only affects the quality of goods, but also wastes a lot of electricity and even causes safety accidents. Let’s discuss the cold room common faults and troubleshooting tips.

1, The temperature of the cold room cannot be dropped down

(1) Insufficient cooling capacity of the compressor: The compressor is the “heart” of the cold room refrigeration system, and its displacement directly determines the cooling capacity. When the displacement decreases due to compressor piston ring wear, valve leakage, lubricating oil deterioration, etc., the temperature of the cold room cannot be dropped down.

(2) Poor heat exchanger of the condenser: The condenser is a key component for the refrigerant to release heat and condense from gas to liquid. If the surface of the condenser is covered with dust, the pipeline is blocked, the cooling fan fails, etc., it will reduce its heat exchanger efficiency.

(3) Severe ice frost on the evaporator: If there is too much ice frost on the surface of the evaporator, it will hinder the refrigerant from absorbing heat and affect the cooling of the cold room. Common causes of evaporator frost include failure of the defrost device, excessive humidity in the cold room, and refrigerant liquid shock (liquid refrigerant directly enters the compressor).

(4) Poor insulation of the cold room: If the thickness of the insulation panels is insufficient, or there are defects such as damage and leakage, the external heat will continue to penetrate, increase the load of the refrigeration system, and make it difficult to reduce the cold room temperature.

(5) Open the cold room doros too frequently: Every time open the cold room door , a large amount of external hot air rushes in, which not only increases the sensible heat load, but also brings a large amount of water vapor, increases the humidity in the cold room, aggravates the ice frosting of the evaporator, and affects the refrigeration effect.

The troubleshooting tips:

(1) Check the compressor timely, replace the piston ring and valve if necessary, and replace the filter screen and flush the lubrication system in time to restore the compressor displacement.

(2) Clean the condenser regularly, clear the blocked pipes, repair the cooling fan, improve the heat dissipation efficiency of the condenser, and ensure that the refrigerant is fully condensed.

(3) Check the defrost device and repair the fault in time; reasonably set the defrost cycle and duration to avoid excessive frosting of the evaporator. Control the relative humidity in the cold room at 80-85% to reduce frosting of the evaporator.

(4) Select materials such as polyurethane with low thermal conductivity and good aging resistance, increase the thickness of the insulation panels, and repair damage and leakage in time to reduce cooling loss.

(5) Optimize the management of the cold room door, shorten the door opening time, and reduce the frequency. Air curtains can be used to block the entry of hot air from the outside. If conditions permit, it is recommended to set up an airlock room to further isolate the outside air.

2, Cold room discharge pressure is too high or too low

(I) Common faults and troubleshooting tips for excessively high discharge pressure in cold room

(1) Poor heat dissipation of the condenser: As mentioned above, when dust accumulates on the surface of the condenser and the pipeline is blocked, the condensation pressure will increase, and the discharge pressure will increase accordingly. The condenser needs to be cleaned and the pipeline unblocked in time.

(2) Excessive refrigerant: Too much refrigerant in the system will increase the condenser pressure and the discharge pressure will increase accordingly. The excess refrigerant needs to be released and restored to the appropriate filling amount.

(3) Non-condensable gas enters the system: If the system vacuum is not enough, non-condensable gases such as air and water vapor will mix in and gather in the condenser, causing the condensation pressure to increase. It is necessary to re-evacuate and exhaust the non-condensable gas.

(II) Common faults and troubleshooting tips for excessively low discharge pressure in cold room

(1) Refrigerant leakage: If there are defects such as cracks and cracks in the refrigerant pipeline, the refrigerant will leak in large quantities, causing the system pressure to drop. It is necessary to check the pipeline, locate the leak point and repair it, and refill the refrigerant to the appropriate amount.

(2) Poor oil return from the evaporator: When the compressor is running, the lubricating oil will enter the evaporator along with the refrigerant and needs to be returned to the compressor regularly. If the oil return pipe is blocked and too much oil accumulates, it will affect the heat exchange of the evaporator, causing the evaporation pressure to drop and the discharge pressure to drop accordingly The oil return pipe needs to be cleared in time.

(3) The opening of the thermal expansion valve is too small: The thermal expansion valve is a throttling device that regulates the flow of refrigerant entering the evaporator. If the temperature sensor is not installed properly, the valve opening is too small, which will reduce the refrigerant entering the evaporator and reduce the evaporation pressure. The position of the temperature sensor needs to be adjusted to restore the normal opening.

We exported panels for refrigerated truck to Mauritius.

The refrigeration system is the heart of any cold room, and its importance cannot be overstated. It plays a vital role in maintaining the temperature and ensuring the preservation of goods stored inside the cold room. The refrigeration system directly impacts the functionality, energy efficiency, safety, and operational costs of the cold room.

Choosing the right refrigeration system for a cold room involves considering several key factors to ensure the system is efficient, reliable, and suitable for the specific requirements of your cold storage needs. Here’s a step-by-step guide to help you select the best refrigeration system for your cold room:

1. Understand the Type of Cold Room

Temperature Range

The first and most important consideration when choosing a refrigeration system for your cold room is determining the temperature range required for storing your goods. Cold rooms are typically categorized based on their temperature needs:

• • Chiller cold room ( 0°C to 10°C)
  • Freezer cold room ( -18°C to -25°C)
  • Blast freezer room ( -30-35°C)
  • Ultra-Low Freezing cold room (below -40°C)

Application: The type of products you are storing (food types, pharmaceuticals, chemicals, etc.) can affect the refrigeration choice.

2. Calculate Cooling Load

The cooling load is the amount of heat that needs to be removed to maintain the desired temperature. This depends on:

• Room size: Volume of the cold room (in cubic meters or feet).
• Product Load: The amount of product you are storing and its thermal mass.
• Insulation: The insulation material and thickness of the cold room walls, ceiling, and floor. Well-insulated rooms reduce the cooling load.
• Heat Gains: From external sources like doors, lighting, equipment, and human presence.
• Airflow: The required air circulation for uniform temperature distribution.

3. Choose the Type of Refrigeration System

Based on the cooling load and application, you can choose from the following types of refrigeration systems:

• Monoblock (Self-Contained) Systems:
• 

• • Ideal for small cold rooms or low-capacity applications.
  • Easy to install and maintain.
  • Suitable for temperatures around 0°C to -10°C.
• Split Systems (Remote Condensing Units):
• 
  • Consists of separate evaporator and condensing units.
  • Suitable for larger cold rooms.
  • More efficient and quieter as the compressor is located outside the cold room.
• Centralized Systems:
• 
  • Used for large cold storage facilities with multiple rooms.
  • More complex and requires professional installation.
  • Offers better energy efficiency for large-scale operations.
• Direct Expansion (DX) Systems:
  • The refrigerant directly evaporates inside the evaporator coil, cooling the air.
  • Suitable for medium- to large-sized rooms.
• Ammonia (NH₃) or CO₂ Systems:
  • Preferred for larger, industrial-sized cold rooms due to their energy efficiency and ability to handle larger loads.
  • Ammonia systems require specialized knowledge and safety precautions.

4. Select the Refrigerant Type

The choice of refrigerant impacts efficiency, environmental impact, and cost. Common refrigerants include:

• R-22 , R-134a, R-404A, R507 a, R-290 (Propane), R717 and CO2

5. Evaluate Energy Efficiency

• Choose a refrigeration system with a high Coefficient of Performance (COP) to reduce energy consumption.
• Look for energy-efficient systems certified with Energy Star or similar certifications.
• Ensure the system has a variable speed drive (VSD) compressor to adjust to load changes and improve energy efficiency.

6. Consider Environmental and Regulatory Factors

• Environmental Impact: Opt for systems using low Global Warming Potential (GWP) refrigerants, such as R-290 or CO₂.
• Regulations: Ensure the system complies with local standards and regulations (e.g., energy codes, refrigerant handling rules).

7. Assess Maintenance and Serviceability

• Choose a system with easy access to parts and services.
• Regular maintenance is key to keeping the system running efficiently, so ensure that the manufacturer or supplier provides good after-sales support.
• Consider the complexity of the system and whether you have in-house maintenance capabilities.

8. Budget Considerations

• Initial Cost: Evaluate the upfront cost of the refrigeration system, including installation, components, and accessories.
• Operating Cost: Consider the long-term energy costs, including electricity consumption and the expected lifespan of the system.
• Maintenance Costs: Account for routine servicing and potential repairs.

9. Consult with an Expert

• If you’re unsure about the best choice, consult with a refrigeration contractor or engineer who can help with system design, load calculations, and equipment selection.

By considering these factors, you can select a refrigeration system that will meet your cold room’s specific requirements, be energy efficient, and offer reliable performance over time.

Our factory produces complete range of Refrigeration Systems with all types of Compressors i.e. Bitzer, Danfoss, Bock, Frascold and Copeland. As the leader in refrigeration technology, we aim to bring you high quality, reliable, long lasting and excellent efficiency products. We had exported many types refrigeration products and cold rooms to Australia, USA, Malaysia, Singapore, Malaysia, Philippines, Indonesia, Kenya, Ghana, Chile, Peru, Lebanon, Jordan, Bahrain, etc.