The water collecting device is composed of a water dividing main pipe and a water collecting main pipe, and the water dividing main pipe is connected to the water supply pipe of the pipe network system, and its main function is to distribute the hot water from the pipe network system to the indoor through the floor heating pipe buried under the floor. Every room that requires floor heating. When the hot water flows in the floor heating pipe, heat is transferred to the floor, and heat is radiated to the room through the floor. The other end of the floor heating pipe is connected to the water collecting main pipe of the water collecting device, and the return water whose temperature is lowered after the heat is radiated indoors is returned to the pipe network system through the water collecting main pipe to complete a cycle.
Due to the influence of hydraulic characteristics, the length of the floor heating pipe needs to be limited to a certain range. Therefore the area that a loop can cover is limited. For this reason, the realization of heating in one area is realized by a plurality of loops, and the device for distributing the heat medium and collecting the heat medium for the plurality of loops is a water collecting device, so people usually refer to the water collecting device again. It is the “water conservancy hub” in the floor heating system.
The water separator is the basis of the water floor heating system. The realization and extension of all the equipment and device functions in the almost heating system depend on the water separator.
Classification of manifolds
1. From the perspective of function and structure, the manifolds are divided into three types: basic type, standard type and functional type.
Basic type: It consists of a water main pipe and a water collecting main pipe. A ball valve is arranged on each branch port of the water collecting main pipe, and a manual exhaust valve is respectively installed on the water collecting pipe. The basic water separator does not have flow regulation.
Standard type: The standard type of water collector is structurally the same as the basic type except that the ball valve on each main pipe is replaced by a flow regulating valve. The manual exhaust valve on the two main pipes is replaced by an automatic exhaust valve. The standard manifolds precisely adjust the flow of each loop, and even the flow adjustment of the luxury standard manifold can be adjusted manually.
Functional type: In addition to all the functions of the standard type of water collector, the functional water collector also has temperature, pressure display function, automatic flow adjustment function, automatic water mixing heat transfer function, thermal energy metering function, and automatic indoor zone temperature control. Features, wireless and remote control. The wireless thermostat currently available on the market, or the imported brand that realizes remote control, is Sener's SAS816FHL-O/RF wireless floor heating thermostat, but this thermostat is not programmable.
In order to prevent rust, the manifolds are generally made of corrosion-resistant metal or synthetic materials. Commonly used materials are copper, stainless steel, copper nickel plating, alloy nickel plating, high temperature plastics and so on. The inner and outer surfaces of the manifold (including connecting parts, etc.) shall be smooth and clean, and shall not have cracks, blisters, cold partitions, slag inclusions, uneven unequal defects, surface-plated joints, uniform color, firm plating, and no deplating. defect.
2, from the design performance and other aspects are divided into: Korean version of the water collector, the European version of the water collector
Korean floor heating is usually relatively simple due to different usage habits and design concepts. In addition, Korean floor heating does not require high temperature control and time division work. Therefore, its water separator does not have to bear too many functional requirements, and the products are relatively simple. More characteristic is that there are two baffles on both sides, which are also the support frames of the two main pipes. Usually, the butterfly-shaped manual valve controls the water passage of the branch pipe to open and close, manual exhaust, simple structure, wall-mounted installation. . The Korean water separator is simple in structure, simple in function, low in intelligence, and low in cost. We call it the Korean version of the water separator.
The European brand's water separator has a finer workmanship and more complete functions. In addition to the ability to adjust the flow, it can also meet the extension of many other functions, which is more intelligent and user-friendly. The European water separator is characterized in that the upper and lower trunks are fixed by a support frame, and the manual bonnet of the branch pipe is easy to install the thermoelectric actuator after being disassembled for convenient room temperature control. Each high-grade road has a visual flow meter that can fine-tune the loop flow and has a temperature gauge, a pressure gauge, a slip-on ball valve, and an automatic exhaust valve. Equipped with a special water separator box, embedded wall installation. The European water separator has a complex structure, powerful functions, high degree of intelligence, and high cost. We call it the European version of the water separator.
With the application and promotion of some high-end residential floor heating in the northern region and the gradual development of heating in the southern region, the European intelligent water separator began to get more applications.
The Korean version of the water separator is widely used in the popular floor heating and engineering projects in the northern region due to its simplicity and low cost.
The European version of the water separator is mainly used in some high-end projects and independent heating systems in the south because of its intelligence and high cost.
Sub-catch selection
The water separator is a key component of the low-temperature hot water floor heating control system. As the advantages of water heating are accepted by more and more people, the importance of the quality of the water separator is gradually recognized by people, but the current market diversity There are many kinds of water heaters, and the products are mixed, and the water leakage accident of the water collector occurs. Therefore, consumers need to understand the quality of the water separator before choosing a floor heating product. It is recommended to use an imported brand. Below, the author will briefly introduce some key points to grasp the quality of the water separator.
First, from the material and process structure of the product
In order to ensure the quality of the water separator, various manufacturers have brainstormed from the material and process structure of the product. From the material point of view, there are currently stainless steel, copper, polymer synthetic materials on the market; from the structural point of view, there are assembly, welding, forging and splicing.
At present, the integrated water separator and the structure of the water separator are integrated and integrated. Brass forging is not only produced
The structure of the product solves the problem of leakage of other water collectors, and effectively eliminates the water leakage of the water separator from the material. For example, Senwei's sub-collector SASF4 series floor heating sub-catch introduces high-precision CNC lathe. The valve core, high concentricity and wear resistance. Standard flowmeters, automatic exhaust valves, drain valves and other important components. It adopts hot-extruded copper nickel plating, which has strong corrosion resistance and pressure resistance. The mounting bracket is thick and the joints are connected. The installation and maintenance are convenient and firm, which greatly improves the service life and reliability of the product. The water volume of each backwater channel of the collecting water pipe can be adjusted, and the electric heating thermostat controller and the geothermal thermostat can be installed in each branch, which can easily realize the intelligent control of the zone. Other imported brands also have integrated sub-catchments, and the functions are not much different. Customers refer to relevant materials.
Due to the different structural forms, the sub-catchers on the market also have great differences in installation and use. Taking the common copper water separator as an example, the assembled water separator is favored by many manufacturers because of its simple process and low technical requirements. Valve companies and even general machinery enterprises, as long as they have machining capabilities, Such a type of water collector can be produced, so this type of water separator has a high proportion in the market. Of course, there are also many water separators with strict process control and reliable quality. Many well-known foreign brands have also extended this structure. This type of manifold has many joints, and once the process control is not strict, it is easy to leak. The other type is the integrated forging or casting of the water separator, which greatly reduces the assembly node and effectively reduces many potential leaking points. It is an ideal structure for the visible manifolds on the market.
Second, from the connection form of the manifold and the system
Since the environment in which the water separator is used is often affected by hot and cold water, the general sealing material is easily deteriorated. With O-rings or gaskets, it is necessary to replace or repair them in 2-3 years under the repeated frequent impact of hot and cold water. Therefore, some high-end foreign brands and domestic manufacturers with hard-sealed joint equipment and technology now use hard-sealed connections between metals. Some small domestic products are not up to the requirements of the technical level, the accuracy of the product does not meet the requirements of hard sealing, and the material selection is cheap, the mating materials do not have the corresponding complementary compressibility, and it is often difficult to achieve a hard seal. . Therefore, to ensure the quality of the manifold, it is wise to choose a hard seal joint.
Third, from the process of see
Process control is a necessary part of ensuring the quality of the manifold. The processing precision is not high, the assembled product is easy to loose, and the surface finish of the propeller stem does not meet the requirements, etc., which will seriously affect the service life and quality of the water separator, and even directly lead to water leakage of the manifold. Therefore, the author suggests that consumers must understand the structure, manufacturer, materials, after-sales service and other related information when selecting a water separator. Choose a genuine and cost-effective product with reasonable structure and guaranteed after-sales service.
Fourth, from the quality and performance point of view
If the boiler's thermal power output is to be properly distributed through the water separator, a low-grade simple water separator may cause the system to circulate poorly, causing the boiler to reflect insufficient combustion or other faults; In the case of the coil length, it is difficult to ensure the length is close. The low-speed simple water separator cannot adjust the loop pressure loss and balance the flow, and may cause hydraulic imbalance, underflow or overcurrent, so that the local heat or overheating is caused. It is easier to solve this problem with a smart water separator that can adjust the flow rate; the room temperature control system also relies on a high-grade intelligent water separator, which is easy to install the control device, and can perform room temperature and running time on the system. Control, to achieve comfort, energy saving and humane purposes. For example, intelligent temperature control center adjustment system, climate compensation adjustment system, system differential pressure adjustment, flow adjustment and so on.