Dry process module is also called prefabricated trough dry process module.
As early as 2000, some companies began to introduce dry modules in the field of home improvement. At that time, the main customers were foreigners who used to use floor heating.
Since 2005, in order to increase the selling point, developers have introduced dry floor heating in some high-end real estate projects.
In the following years, the dry process module has been promoted to a certain extent, but it has always developed in a small scale. In the case of two or three projects a year, there are more wolves and less meat, and countless brands have experienced the cycle of life and death, and it has not improved until recent years.
2 The difference between dry module and wet floor heating
Wetland heating enters the site after hydropower is completed, and dry floor heating enters the site after hard installation is basically completed, thus avoiding the possible influence of other decoration processes on floor heating.
In addition, there are great differences in heating speed, floor height and cost. For comparison, I made the following table for reference.
3 market situation of dry process module
I. Types of dry process modules
At present, the main dry floor heating module products on the market are basically composed of insulation layer and aluminum plate, which can be divided into keel module and non-keel module according to the installation method.
1. keel drying method module
According to the size of the floor heating module, the wooden keel is fixed, the floor heating module is laid in the wooden keel, the aluminum plate soaking layer is laid on the wooden keel, and the wooden keel shares the weight of the floor and furniture.
2. No keel dry module
The floor heating module directly bears the gravity of the floor and furniture, so the strength requirement of the floor heating module is higher.
Because the installation of the keel-free method module does not need wooden keel, the field installation is more flexible.
In addition to classification by installation method, it can also be classified by insulation materials and pipe diameter of floor heating.
Second, some problems of dry process module
Dry module is composed of insulating layer and aluminum plate. Compared with the traditional wet module, the dry module has higher requirements. Once the product quality or construction is not up to standard, it is easy to have various problems.
1. Insulation material is unqualified.
The insulation performance is not up to standard, and the energy consumption of floor heating remains high; If the compressive strength is not enough, there may be hidden dangers of ground collapse.
2. The soaking layer is not up to standard.
JJ142-2012 stipulates that the soaking layer shall be made of materials not less than 237 W/(m k) and the thickness shall be not less than 0.3 mm ..
If the thickness is not up to standard, uneven heating and cooling may occur, which will affect the comfort of heating.
3. Production technology
When the insulation layer and soaking layer are combined into one, if the production process is not up to standard, there may be:
(1) The soaking layer falls off, which aggravates the noise between the pipeline and the aluminum plate;
② The clamping groove is too shallow to fix the pipe, and the pipe is stuck;
(3) The heat transfer effect of the pipeline with too deep groove is poor, which affects the heating effect.
4. The construction is not standardized
The construction requirements of dry floor heating are very high. If the construction is not carried out according to the specifications, it will directly affect the construction progress and quality. Please refer to the following video for details:
The product quality and construction quality of dry module will affect the final floor heating effect, and also affect the trust of HVAC companies and consumers in dry module. I believe that there will be more high-quality dry-method modules and better construction teams in the future.
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Prospect of dry process module
At present, the dry process module still has great development potential:
1. The hardcover policy is implemented everywhere, and the existing clean rooms are finely decorated, and the weight of the backfill layer of the floor heating concrete is not considered in the bearing capacity of the building structure, which is helpful for the promotion of dry floor heating.
2. The country promotes prefabricated buildings, and dry floor heating, as a part of the ground assembly process, will also usher in the development opportunities of the engineering market.
3. Dry floor heating is characterized by floor saving, ready to use, and can also meet the decoration needs of some owners.