Knowledge to buy before heating
2019-01-24 15:04:16
First, in advance to understand the heating water quality and system methods Before you buy a radiator, to understand the water quality of the area, and the heating system heating method (such as separate household heating or central heating) heating system is an open or closed system, do To the heart. Our wall-hung boilers are closed systems. Beijing has few open systems.
If you want to change the radiator in your home, try to understand the situation of the system connected to your home heating.
There are three ways for independent heating of the pipeline system; single-tube series, parallel, and octopus-type pipeline system to say that the next single-tube series system 1. Single-tube series of single-tube series is characterized by low material usage, labor intensity is relatively weak, transformation The time is shorter. The water in the entire system passes through the first set of radiators of the system first, followed by the second group, the third group... (ie, the first group of heating backwaters is the second group of heating water supply), so the water temperature gradually follows the order of the series. Traffic weakened. Under the same conditions, the temperature difference between the first group and the last group of heaters brought to the room can differ by more than 2 degrees.
This system is the worst, but it can be upgraded.
Single-tube and series-crossing type technical transformation In order to adjust the water temperature of a single set of heating, a bypass valve must be added to the inlet and outlet of the radiator. Some use three-way control valves, and some use three valve valves. If the single-pipeline system is not bypassed, turning off one set of heating will cause the entire system to be interrupted immediately, and the other heating will not be hot. Moreover, the number of radiators to be arranged in a single tube series is more. In order to meet the needs of the system circulation, the head of such heating systems also needs to be relatively thick. 2. In parallel systems, the parallel system is divided into an out-of-path and off-path. The feature is that the pipeline travel is short, each group of heating can be controlled independently, and the system's water flow balance will be greatly improved compared to the single-tube series. However, this system still has certain limitations. The water flow of each radiator is different. The backwater of the front radiator is relatively close to the main pipeline, and the backwater is relatively fast. The backwater backwater is relatively slow, which may cause the terminal heater to be neither hot nor hot. The solution is to solve the problem through valve adjustment. In the working state of the system, the front heating return valve is turned off slightly to ensure the system hydraulic balance, so that the end heating slowly heat up. There is the end of the heating as much as possible than other heating, so that the end of the heating backwater resistance is reduced to a minimum.
The characteristics of parallel-connected parallel systems with parallel systems are basically the same as parallel ones. However, there are differences in the principle of operation, simply put, called for the first time after the back, that is, the first group of radiator backwater temporarily does not circulate to the main pipe, but continue to go down, connect the next set of radiator return pipe , And so on... Pull a return water line from the end of the radiator and return it to the return pipe of the main pipe. The water flow of each set of radiators of the system is basically the same, and the system is very balanced. Generally, there is no phenomenon that the terminals are not hot. It can be said that it is the best way to balance the hydraulic system.
3. The octopus pipeline system boiler inlet and outlet are respectively connected to the radiators of each group through the water separator and the water collector. The hydraulic balance between the parallel pipes is adjusted by the valves on the water separator to balance the loops. Resistance can be divided into indoor temperature control. This kind of system is costly.
Second, according to the requirements to choose the type of heating radiators currently on the market are;
Steel radiator, beautiful appearance, fashionable style, rich colors, changeable shape, the space is not large, common round tube, elliptical tube two types of interface from the point of view, can be divided into lap welding (double ride) and Plug welding (film head) two. Due to the poor corrosion resistance of the steel itself, production is eliminated and the corrosion of the matrix of the steel itself and the corrosion of the solder joints are eliminated. All the products on the market have been internally preserved, but they still have to maintain the full water state of the heating when the heating is stopped. This is known as 'full water maintenance'. To prevent secondary corrosion of air and water, here I emphasize the process of lap welding and film heading. The lap welding heat is welded by two main pipes and multiple sub-pipes. Most of them are machine-opened and machine-welded. The fine craftsmanship. There are also individual manufacturers who operate manually. The process is definitely rough. How can we distinguish between them? To see if the space between the radiator and the sheet is the same, the pitch of the manual punching welding is different, and it can be seen by looking closely. The top of the lap welding heater is poor in corrosion resistance, because the running points are lower than the top of the tube, so the top is easily filled with air to cause oxidative corrosion. The general manufacturer will use brazing during processing, and some manufacturers do not need brazing to reduce the cost of heating. The process of the head heating is that the heads at both ends of the heating are stamped and formed by welding of two halves. The tubes and heads are welded together, and are formed by grinding and other processes. Of course, the cost of the head of a stamping is more than two and a half. Welded, the safety factor is also equal. Everyone would not buy defective products when they were careful when they were buying steel heaters and they knew more about the knowledge.
Copper-aluminum composite (steel aluminum. titanium magnesium aluminum) radiator; this type of radiator has good corrosion resistance, fast heat dissipation, light weight, but the price is high. The advent of copper-aluminum composite products is based on two considerations: First, aluminum has high thermal conductivity and low cost. The second is to solve the anti-corrosion problem, because the corrosion resistance of copper is relatively good in the metal, and the current market is basically a copper-aluminum composite product. There are two aspects of this type of product that require the owner to pay attention;
1. The main and subsidiary pipes are brass or copper. The price difference between them is very large and the service life is different.
2. The tube expansion technology still cannot solve the (memory memory function) problem. Because of this memory function, the thermal decay phenomenon must be filled in, that is, the main reason why the copper-aluminum composite product cannot satisfy the heat after being used for several years. (The structure of the copper-aluminum heater is described below. The outer surface of the radiator is an aluminum pipe and a fin. The water channel is composed of a copper pipe. The copper pipe is a copper-aluminum heater. After several years of hot-cold shrinkage, there will be gaps between the copper tube and the aluminum tube, and the thermal conductivity will drop.If the original 1.2-meter-high copper-aluminum heating capacity is 3 square meters, the heat dissipation phenomenon will occur after the heat attenuation phenomenon occurs. If you can't reach 3 square meters, the heat dissipation may be reduced to 2 square meters.(Not that copper and aluminum heating is not good, and my family also has copper and aluminum heating. I just objectively say the disadvantages of copper and aluminum heating.)
Steel aluminum and titanium magnesium aluminum radiators avoid the above-mentioned (metal memory function, say white is the thermal attenuation problem caused by thermal expansion and contraction, which greatly improves the service life of the product. Because steel is hard, not Deformation, so there will be no separation from the aluminum tube, there will be no heat attenuation.(In the case of heat is not as good as copper and aluminum heating, but the cost is relatively low compared to copper and aluminum, is a good choice for independent heating.
Titanium magnesium aluminum radiator has the advantages of large heat dissipation (more heat than copper and aluminum heating). The process is completely different from that of copper, aluminum, steel and aluminum. There is a press-type one-cast molding, no heat. Attenuation problem is the only heater that can be assembled in a new type of heating system. It can increase the number of sheets at will and has a beautiful appearance. It does not want copper, aluminum and steel aluminum to be of a single shape.
If the residential area is a centralized heating system, the radiators on the market can basically be used. If it is an independent household heating system, it is better to use a compound type radiator, which has fast heat dissipation and corrosion resistance. The heat sink used in each room is preferably of the same or similar material to avoid potential corrosion between different materials.
It's more important to say something with everyone.
Heating configuration algorithm; various manufacturers of heating and cooling are based on the inlet temperature of 95 °
Backwater temperature 70°
Indoor temperature 18°
Parameter calculated value 60
Heat dissipation (Watts)
(The calculated value is 60 watts is the amount of heat required per square meter when the room temperature is 18 degrees. This is the calculated value of the upward and downward, and now the heating is installed for the sake of beauty and it is down, so the heat loss is about 15%. The calculated value of this loss is about 70 watts.) The area required to multiply the room is equal to the amount of heat required by the room.
For example, your home bedroom is ten square meters in multiplied by a calculated value of 70 equal to the room's required heat dissipation divided by the heat dissipation of a single piece of heating (steel elliptical tube heating is 0.6 meters high is 115 watts) equal to 6.08 tablets to make 7 tablets . Everyone can use this formula to calculate.
If you want to change the radiator in your home, try to understand the situation of the system connected to your home heating.
There are three ways for independent heating of the pipeline system; single-tube series, parallel, and octopus-type pipeline system to say that the next single-tube series system 1. Single-tube series of single-tube series is characterized by low material usage, labor intensity is relatively weak, transformation The time is shorter. The water in the entire system passes through the first set of radiators of the system first, followed by the second group, the third group... (ie, the first group of heating backwaters is the second group of heating water supply), so the water temperature gradually follows the order of the series. Traffic weakened. Under the same conditions, the temperature difference between the first group and the last group of heaters brought to the room can differ by more than 2 degrees.
This system is the worst, but it can be upgraded.
Single-tube and series-crossing type technical transformation In order to adjust the water temperature of a single set of heating, a bypass valve must be added to the inlet and outlet of the radiator. Some use three-way control valves, and some use three valve valves. If the single-pipeline system is not bypassed, turning off one set of heating will cause the entire system to be interrupted immediately, and the other heating will not be hot. Moreover, the number of radiators to be arranged in a single tube series is more. In order to meet the needs of the system circulation, the head of such heating systems also needs to be relatively thick. 2. In parallel systems, the parallel system is divided into an out-of-path and off-path. The feature is that the pipeline travel is short, each group of heating can be controlled independently, and the system's water flow balance will be greatly improved compared to the single-tube series. However, this system still has certain limitations. The water flow of each radiator is different. The backwater of the front radiator is relatively close to the main pipeline, and the backwater is relatively fast. The backwater backwater is relatively slow, which may cause the terminal heater to be neither hot nor hot. The solution is to solve the problem through valve adjustment. In the working state of the system, the front heating return valve is turned off slightly to ensure the system hydraulic balance, so that the end heating slowly heat up. There is the end of the heating as much as possible than other heating, so that the end of the heating backwater resistance is reduced to a minimum.
The characteristics of parallel-connected parallel systems with parallel systems are basically the same as parallel ones. However, there are differences in the principle of operation, simply put, called for the first time after the back, that is, the first group of radiator backwater temporarily does not circulate to the main pipe, but continue to go down, connect the next set of radiator return pipe , And so on... Pull a return water line from the end of the radiator and return it to the return pipe of the main pipe. The water flow of each set of radiators of the system is basically the same, and the system is very balanced. Generally, there is no phenomenon that the terminals are not hot. It can be said that it is the best way to balance the hydraulic system.
3. The octopus pipeline system boiler inlet and outlet are respectively connected to the radiators of each group through the water separator and the water collector. The hydraulic balance between the parallel pipes is adjusted by the valves on the water separator to balance the loops. Resistance can be divided into indoor temperature control. This kind of system is costly.
Second, according to the requirements to choose the type of heating radiators currently on the market are;
Steel radiator, beautiful appearance, fashionable style, rich colors, changeable shape, the space is not large, common round tube, elliptical tube two types of interface from the point of view, can be divided into lap welding (double ride) and Plug welding (film head) two. Due to the poor corrosion resistance of the steel itself, production is eliminated and the corrosion of the matrix of the steel itself and the corrosion of the solder joints are eliminated. All the products on the market have been internally preserved, but they still have to maintain the full water state of the heating when the heating is stopped. This is known as 'full water maintenance'. To prevent secondary corrosion of air and water, here I emphasize the process of lap welding and film heading. The lap welding heat is welded by two main pipes and multiple sub-pipes. Most of them are machine-opened and machine-welded. The fine craftsmanship. There are also individual manufacturers who operate manually. The process is definitely rough. How can we distinguish between them? To see if the space between the radiator and the sheet is the same, the pitch of the manual punching welding is different, and it can be seen by looking closely. The top of the lap welding heater is poor in corrosion resistance, because the running points are lower than the top of the tube, so the top is easily filled with air to cause oxidative corrosion. The general manufacturer will use brazing during processing, and some manufacturers do not need brazing to reduce the cost of heating. The process of the head heating is that the heads at both ends of the heating are stamped and formed by welding of two halves. The tubes and heads are welded together, and are formed by grinding and other processes. Of course, the cost of the head of a stamping is more than two and a half. Welded, the safety factor is also equal. Everyone would not buy defective products when they were careful when they were buying steel heaters and they knew more about the knowledge.
Copper-aluminum composite (steel aluminum. titanium magnesium aluminum) radiator; this type of radiator has good corrosion resistance, fast heat dissipation, light weight, but the price is high. The advent of copper-aluminum composite products is based on two considerations: First, aluminum has high thermal conductivity and low cost. The second is to solve the anti-corrosion problem, because the corrosion resistance of copper is relatively good in the metal, and the current market is basically a copper-aluminum composite product. There are two aspects of this type of product that require the owner to pay attention;
1. The main and subsidiary pipes are brass or copper. The price difference between them is very large and the service life is different.
2. The tube expansion technology still cannot solve the (memory memory function) problem. Because of this memory function, the thermal decay phenomenon must be filled in, that is, the main reason why the copper-aluminum composite product cannot satisfy the heat after being used for several years. (The structure of the copper-aluminum heater is described below. The outer surface of the radiator is an aluminum pipe and a fin. The water channel is composed of a copper pipe. The copper pipe is a copper-aluminum heater. After several years of hot-cold shrinkage, there will be gaps between the copper tube and the aluminum tube, and the thermal conductivity will drop.If the original 1.2-meter-high copper-aluminum heating capacity is 3 square meters, the heat dissipation phenomenon will occur after the heat attenuation phenomenon occurs. If you can't reach 3 square meters, the heat dissipation may be reduced to 2 square meters.(Not that copper and aluminum heating is not good, and my family also has copper and aluminum heating. I just objectively say the disadvantages of copper and aluminum heating.)
Steel aluminum and titanium magnesium aluminum radiators avoid the above-mentioned (metal memory function, say white is the thermal attenuation problem caused by thermal expansion and contraction, which greatly improves the service life of the product. Because steel is hard, not Deformation, so there will be no separation from the aluminum tube, there will be no heat attenuation.(In the case of heat is not as good as copper and aluminum heating, but the cost is relatively low compared to copper and aluminum, is a good choice for independent heating.
Titanium magnesium aluminum radiator has the advantages of large heat dissipation (more heat than copper and aluminum heating). The process is completely different from that of copper, aluminum, steel and aluminum. There is a press-type one-cast molding, no heat. Attenuation problem is the only heater that can be assembled in a new type of heating system. It can increase the number of sheets at will and has a beautiful appearance. It does not want copper, aluminum and steel aluminum to be of a single shape.
If the residential area is a centralized heating system, the radiators on the market can basically be used. If it is an independent household heating system, it is better to use a compound type radiator, which has fast heat dissipation and corrosion resistance. The heat sink used in each room is preferably of the same or similar material to avoid potential corrosion between different materials.
It's more important to say something with everyone.
Heating configuration algorithm; various manufacturers of heating and cooling are based on the inlet temperature of 95 °
Backwater temperature 70°
Indoor temperature 18°
Parameter calculated value 60
Heat dissipation (Watts)
(The calculated value is 60 watts is the amount of heat required per square meter when the room temperature is 18 degrees. This is the calculated value of the upward and downward, and now the heating is installed for the sake of beauty and it is down, so the heat loss is about 15%. The calculated value of this loss is about 70 watts.) The area required to multiply the room is equal to the amount of heat required by the room.
For example, your home bedroom is ten square meters in multiplied by a calculated value of 70 equal to the room's required heat dissipation divided by the heat dissipation of a single piece of heating (steel elliptical tube heating is 0.6 meters high is 115 watts) equal to 6.08 tablets to make 7 tablets . Everyone can use this formula to calculate.
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