How to heat the floor of the freezer?

The ground of cold storage should have strong anti-impact ability.
Whether it is a large or small storage, if the ground is the same as the wall panel and the roof, the insulation will be deformed, cracked, and separated from the drum if it is generally not super high for one year.
The best practice at present is: laying a cushion on the ground, the cushion should be level, and the error cannot exceed 1cm, and then lay a PE moisture-proof layer, spread the extruded board with staggered seams, and then spread the moisture-proof layer, and then hit the reinforced concrete.
Just apply the calender, the thickness of the concrete and the size of the steel bars can be selected according to the ground load.

Floor practice in cold storage

1.
Ventilation layer (ventilated low wall or ventilated attic or laying vent pipe)

2.
Cement thick slab (the ventilation layer is made of low ventilation wall or ventilation pipe)

3.
Moisture-proof and waterproof layer (we generally use SBS coil)

4.
Insulation layer (generally 200mm, XPS extruded board or polyurethane foam)

5.
Reinforced concrete leveling (generally 120mm)

The completed floor is generally as high as the platform, the platform height is 1.
2m-1.
5m, and when the height of the above 5 items is less than the height of the platform, backfill soil (general soil) must be laid under the ventilation layer.
), and then tamped with a rammed stone (generally 300mm) to make the total height reach the platform height.
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There are many examples of cold storage damage caused by freezing of the foundation soil.
The lighter floor bulges, the heavier walls and columns are lifted, and the more severe ones can cause damage to the entire structural system, making the entire cold storage scrapped and causing huge losses.
At present, there are mainly the following methods for thermal insulation treatment of domestic and foreign cold storage floors: 

 1.

2.
Ventilation floor: that is, a ventilation pipe is buried under the insulation layer of the cold storage floor.
Ventilation pipes are generally laid by cement pipes or cylinder tile pipes.
The ventilated floor can be divided into two types: natural ventilation and mechanical ventilation.
Naturally ventilated floors rely on outdoor air as the heat source.
When outdoor air passes through the ventilation ducts under the action of heat and wind pressure, it will continue to supplement heat, so that the lower part of the cold storage insulation layer is always kept above 0°C.
The mechanical ventilation floor adopts the method of sending steam into the ventilation duct to increase the temperature of the lower part of the insulation layer of the cold storage.
This method is generally used in the heating season, usually using fans to send outdoor air into the ventilation ducts.
Naturally ventilated floors are generally used for cold storage in areas with short depths and high outdoor temperatures in winter.
Mechanically ventilated floors are generally used in large-scale cold storage, but ventilation ducts must be organized through ventilating ducts to deliver heat in a planned way.

The final finishing method of the cold storage floor:

Cold storage is a constant temperature storage air-conditioning device for food, dairy products, meat, aquatic products, etc.

The cement floor has poor resistance to low temperatures.
In addition, the concrete floor itself has the problem of cracking.
Long-term use in this environment will only exacerbate the crack problem.
Therefore, the concrete floor is not suitable for direct use as the floor of the cold storage, but must be covered with low-temperature resistant floor materials to protect it.
 

In addition, in order to improve the working efficiency of the cold storage, forklifts are used to transport frozen products.
The impact of forklifts on the ground is great, causing sand and dust problems, which reduces the hygienic quality of the cold storage and contaminates frozen products.
The problems on the floor of the cold storage are mainly caused by low temperature and forklift rolling.
Therefore, when choosing floor materials for cold storage, low temperature resistance and impact resistance must be met.
The water-based polyurethane mortar is self-leveling, which can meet the requirements and protect the damaged cement floor.

Self-leveling waterborne polyurethane mortar is a combination of organic and inorganic materials.
Its unique toughness and recovery ability ensure that it can still maintain good adhesion with concrete at a certain temperature without cracking and maintain the original mechanical and chemical properties.
The applicable temperature range is -40°C to +150°C , Even under extremely low temperature conditions, it can maintain a good structural state.
 

The flat and seamless overall design has high mechanical strength and low coefficient of elasticity.
It is very elastic and will not crack or delaminate due to the brittleness of the material.
It is sturdy and durable, can withstand the squeeze of forklifts, trolleys and other tools for a long time; it has high bonding strength with the base layer, extremely low hardening shrinkage, not easy to break, and can achieve the ideal ground effect.
 

Water-based polyurethane mortar self-leveling can meet the ground requirements in some extreme use environments, and it is one of the current high-end floor materials.
Therefore, it is naturally used in refrigeration.

3.

345--Good comprehensive mechanical properties, low temperature performance, good plasticity and weldability, used as structures, mechanical parts, and building structures that bear dynamic loads such as medium and low pressure vessels, oil tanks, vehicles, cranes, mining machinery, power stations, bridges, etc.