【-18℃ Cold Storage】Dedicated for Meat/Seafood/Pharmaceuticals | Integrated Freshness Preservation, Cold Storage, and Freezing | Customized Quotation from Manufacturer

In the fields of fresh food cold chain, central kitchen, and pharmaceutical distribution, cold storage is the core infrastructure that guarantees product quality and extends shelf life. Unlike ordinary fresh-keeping warehouses (0~5℃) or deep-freezing cold storage (-35℃ and below), cold storage typically covers a temperature range of -18℃ to +5℃, meeting both refrigeration and partial freezing needs. It is a cost-effective and widely used type of commercial cold storage.

A professional cold storage facility is not just about lowering the temperature; it also involves maintaining stable temperature, reducing dry loss, and lowering electricity costs under complex operating conditions such as long-duration door opening operations, high ambient temperatures, and multiple batches of incoming and outgoing goods. These are the core criteria for judging the quality of a cold storage system.

Core product advantages: stability, energy efficiency, and long lifespan

1. Flexible temperature zones: Refrigerated/frozen compartment design

 It can be designed as a single-temperature warehouse (with one temperature throughout the entire warehouse) or a dual-temperature warehouse (with one refrigerated room and one frozen room sharing a set of units) according to customer needs.

 Common configurations:

 - Refrigerated room: 0℃~+5℃ (fruits and vegetables, eggs and milk, vaccines)

 - Freezing room: -10℃～-18℃ (meat, aquatic products, ice cream)

 One set of unit, equipped with two sets of evaporators, automatically switches through solenoid valves, significantly reducing the cost and footprint of the storage facility.

2. High-efficiency refrigeration unit: branded compressor + corrosion-resistant evaporator

 The core of the unit utilizes branded compressors matched with high-efficiency finned or shell-and-tube condensers. The evaporator comes standard with corrosion-resistant coated aluminum fins and stainless steel electric defrosting tubes, making it particularly suitable for high humidity or salt spray environments (such as seaside areas or seafood markets). This effectively addresses issues such as fin corrosion and incomplete defrosting, which can lead to ice blockage.

3. Intelligent electronic control and remote monitoring

 Equipped with a standard microcomputer temperature controller, it supports:

 - Automatic temperature-controlled start-stop

 - Dual defrosting with timing and temperature control

 - SMS for high/low temperature overrun

 - Optional 4G IoT module allows remote viewing of cold storage temperature, power on/off, and parameter modification via a mobile phone, significantly reducing management costs and meeting GSP/GMP data recording requirements for pharmaceutical cold storage.

4. Cold insulation of the storage body: dual solutions of on-site polyurethane foam application and prefabricated panels

 - Small and medium-sized cold storage facilities (less than 500 square meters): It is recommended to use 0.5mm color steel and 100mm/150mm polyurethane sandwich panels, which are lightweight, easy to install, and have a thermal insulation coefficient of ≤0.022 W/(m·K).

 - Large cold storage (>500㎡): It is recommended to use civil engineering internal insulation combined with on-site high-pressure foam insulation. This approach eliminates cold bridges, ensures good overall performance, and has a service life of over 20 years.

Application scenario matches temperature zone

| Application Scenario | Typical Product | Recommended Temperature | Relative Humidity | Expected Shelf Life |

| Central Kitchen | Frozen meat, semi-finished products, vegetables | -18℃ (frozen products) / +2℃ (fresh products) | — | 30-90 days |

| Meat Wholesale Market | Pork, Beef, and Mutton | -5℃～-10℃ (aging) / -18℃ (freezing) | 85%~90% | Aging for 72 hours → Freezing for 6 months |

| Aquatic products/Seafood | Marine fish, shrimp, and shellfish | -18℃～-25℃ | 90%~95% | 6~12 months |

| Pharmaceuticals/GSP | Vaccines, biologics, blood | 2℃～8℃ (refrigerated) / -20℃±2℃ (frozen) | 45%~65% | Follow the drug instructions |

| Ice cream/Ice lolly | Pre-packaged ice product | -22℃～-25℃ | — | 12~18 months |

| Baking/Dairy Products | Cream, Butter, Cheese | +2℃～+8℃ | 75%~80% | 14~90 days |

Selection and quotation guide:

Cold storage is a highly non-standard product, and its price is influenced by the following four major factors:

1. Dimensions and temperature of the storage body

2. Temperature zone differences

3. Equipment brand

4. Installation location and environment

Installation and maintenance guide: Reducing total lifecycle costs

Installation phase (do it right the first time to avoid ten years of trouble)

- Ground protection*: An XPS (extruded polystyrene) board or lightweight concrete vapor barrier must be installed to prevent frost heaving and ground cracking.

- Anti-cold bridge treatment: The joints of the cold storage panels, door frames, and through-wall pipelines must be sealed with foam rubber or specialized sealing strips.

- Electric heat tracing for drainage pipes: In -18℃ warehouses, it is necessary to install heat tracing bands on defrosting drainage pipes to prevent freezing and blockage.

Routine maintenance (small investment, big savings)

- Defrosting cycle: For air-cooled evaporators, it is recommended to defrost once every 4 to 6 hours, with each defrosting session lasting for 15 to 20 minutes. Frequent defrosting consumes electricity, while not defrosting can lead to ice buildup blocking the air duct and slow temperature reduction.

- Condenser cleaning: For air-cooled units, use a high-pressure air gun to blow off the fins every quarter; for water-cooled units, clean the condenser tubes annually.

- Refrigeration oil replacement: Piston/screw compressors should be replaced every 4000~5000 hours or once a year.

- Quick check for common faults:

 - The temperature in the warehouse cannot be lowered → First check if the condenser is dirty, then check if the defrosting is normal, and finally check if there is any leakage of refrigerant

 - Frequent start-stop of compressor → Check the temperature difference setting of the thermostat (recommended to be ≥3℃) and the pressure controller setting

Industry Qualifications and Certifications (H2): Pharmaceutical/Food Cold Storage that Meets Regulatory Requirements

If you operate in regulated industries such as pharmaceuticals, school cafeterias, or central kitchens, our cold storage facility can provide a comprehensive suite of compliance documents:

- Pharmaceutical/GSP cold storage: Meet the five verification requirements (temperature distribution, door opening operation, power failure insulation, etc.) in Appendix 5 of the "Good Supply Practice for Pharmaceutical Products", equipped with dual-unit automatic switching and temperature and humidity recorders.

- Food/SC certified cold storage: Compliant with the "National Food Safety Standard - Hygienic Practice for Food Cold Chain Logistics" (GB 31605-2020), providing a material testing report for the storage body (food contact grade).

- Fire safety: The flame retardant rating of the storage board can be achieved at B1 level (hard to ignite), and smoke detectors, emergency lighting, and explosion-proof switches are all equipped.

Common question: 5 essential questions to ask before purchasing a refrigerated warehouse

Q1: What is the difference between a refrigerated warehouse and a fresh-keeping warehouse?

A: The temperature ranges differ. The fresh-keeping storage (0~15℃) is primarily intended for short-term storage and respiratory inhibition; whereas the refrigerated storage (-18℃~+5℃) incorporates a freezing function, suitable for perishable goods such as meat, seafood, and ice cream that require long-term refrigeration. If your products require freezing and have a shelf life exceeding one month, please opt for the refrigerated storage.

Q2: How much electricity does a refrigerated warehouse consume in a day?

A: Taking 50 tons (300m³) and -18℃ as an example, the average daily electricity consumption is about 80~150 kWh (affected by the frequency of door opening and closing, and ambient temperature). By using a variable frequency unit + polyurethane thick board + scheduled defrosting, it can save 20%~35% of electricity compared to traditional fixed frequency units.

Q3: Can an old house be converted into a cold storage facility?

A: Yes, it can. However, please note that: ① the original building must be sturdy and free from water seepage; ② the walls/ceiling should be internally insulated (either through polyurethane spraying or panel installation); ③ the floor should have an anti-freezing vapor barrier followed by concrete backfilling; ④ ensure proper ventilation and moisture prevention. It is recommended to have professionals conduct an on-site inspection before proceeding with the design.

Q4: Can a refrigerated warehouse be converted into a controlled atmosphere warehouse?

A: It cannot be directly modified. For a controlled atmosphere storage, additional equipment such as nitrogen generators, carbon dioxide removers, ethylene removers, and airtight seals are required. The modification cost is almost equivalent to building a new one. If you plan to implement controlled atmosphere storage, please choose the controlled atmosphere storage solution from the beginning.

We offer free services including survey, scheme design, and quotation list. Simply provide the following information, and we will issue a professional scheme within 24 hours:

1. Location of the storage facility (city + indoor/outdoor)

2. Stored products and total quantity (kg/ton or cubic meter)

3. Target temperature (refrigerated / frozen / dual temperature)

4. Budget range (to assist us in recommending the optimal brand mix)

Cold storage engineering consultation: Tel / WhatsApp: +86 195 2866 2782

Send the required drawings to: 57826900@qq.com