The small squirrel wall hung boiler casing machine is better or the plate replacement machine

In general, the casing machine is generally referred to as the economy model, while the plate changer is known as the comfort model. In the end, it is better to consider which one is better according to your own preferences, economic conditions and local water quality.

The main difference between the wall-hung boiler plate changer and the casing machine is that the plate changer is based on the casing machine and adds a plate heat exchanger. Casing machine and plate replacement machine are common wall-hung boilers, casing machine is mainly subject to the stability of tap water pressure, if the water pressure is unstable, then the domestic hot water is prone to cold and hot phenomenon, and the plate replacement machine is to increase the plate change, so as to solve the problem of hot and cold.

However, if the water quality is not very good, then the plate changer of the plate changer is easy to scale. Therefore, the two have their own advantages and disadvantages.

The main difference is that the heat exchange method of hot water in the bathroom is different, the plate replacement model provides domestic water through secondary heat exchange, and the casing provides hot water through direct heat conduction through the main exchange. Each has its own advantages, the casing machine has better anti-impact, and the hot water output speed is faster; The heat of the plate changing machine is uniform, and the domestic hot water is comfortable to use.

Personally, I think it is better to change the plate machine, because the water temperature is stable, and the water temperature of the casing machine will be hot and cold.

When choosing a wall-hung boiler, you should consider it comprehensively according to your own preferences, economic conditions and local water quality, and choose the right one to use comfortably. However, for areas with poor water quality and serious scale, the casing machine is easy to scale but not easy to clog.

Answer 1: The principle is different: although the double casing type has a secondary heat exchange, because the water heater is converted into a boiler, like an ordinary water heater, the flame direct heating exchanger, the gas ratio and the water flow rate cannot be completely matched. The principle of plate exchange heat exchange is to carry out secondary heat exchange through the secondary heat exchanger, which alleviates the contradiction between gas and water flow, but still achieves the purpose of constant temperature by controlling the water flow, so the water flow rate changes.

2. Different forms: the double casing is designed together with the heating main heat exchanger in the combustion chamber. The plate heat exchanger is designed on the waterway plate outside the combustion chamber.

3. The material is different: the double casing is a copper pipe. The plate heat exchanger is stainless steel. The maximum pressure of the casing machine is 6kg, and the maximum pressure of the plate type is 10kg.

4. Different scaling: the tap water in the double casing directly absorbs the heat of the main heat exchanger in the furnace, and continues to absorb the heat of the furnace flue gas when the hot water function is not used, which is easy to cause scaling. When the hot water function is not used, the electric three-way valve switches back to the heating state, and the heat of the primary heating water will not continue to bring the tap water in the plate exchanger, so it is not easy to scale.

The best is what suits your room. For example, if you need a 28kw wall-hung boiler, but a 28kw furnace generally does not have a casing machine. If you need a more affordable cost, the casing machine is relatively cheaper.

It is recommended that you use the plate replacement machine, because the casing machine is not easy to be blocked by scale, and the domestic hot water is fast, the amount of water is large, and the temperature of the domestic hot water is suitable, and there will be no hot and cold for a while.

According to the normal theory, the wall-hung boiler of the little squirrel, the plate replacement machine and the sleeve shutdown are all there, so the plate replacement machine is mainly the addition of the plate heat exchanger on the basis of the casing machine, so as to stabilize the water pressure and other purposes, so the plate exchange wall-hung boiler is produced. Then when choosing, you should combine your own situation, comprehensively investigate the choice, and get the right product for yourself.

According to the different structures, there are plate replacement and casing models; The advantage of the plate replacement model can be used in environments where the water pressure is relatively unstable. The advantages of the casing type model are high cost performance and easy maintenance.

The difference between the casing machine and the plate changer of the gas wall-hung boiler: the heating function is different, and the water supply comfort is different.

First, the heating function is different:

Casing type: the high-temperature flue gas generated after gas combustion passes through the heat exchanger, and the heating water is heated through heat exchange, and the circulating water pump makes the heating water circulate in the wall-hung furnace and the heating system, so as to provide heating, and the domestic hot water is not flowing at this time.

Plate exchange: The high-temperature flue gas generated after gas combustion passes through the main heat exchanger, and the heating water is heated through heat exchange, and the circulating water pump makes the heating water circulate in the wall-hung furnace and the heating system, so as to provide heating.

Second, the comfort of water supply is different:

Casing type: in the process of using domestic hot water, the user temporarily closes the production of hot water and opens it in a short time, because the water in the main heat exchanger does not flow, the waste heat of the main heat exchanger and the first high temperature water will heat the domestic hot water in the casing, at this time, there will be a period of high temperature hot water when the domestic hot water is opened, which is easy to cause the domestic hot water to be hot and cold, and even burn the user.

Plate changer: Because the stainless steel plate heat exchange is completely outside, it will not be affected by the residual heat of the furnace, and the temperature control is still uniform and stable when the faucet is turned on frequently, which is safer and more comfortable in the use of domestic hot water.

How it works. When the ignition switch of the wall-hung boiler enters the working state, the fan starts first to form a negative pressure difference in the combustion chamber, the wind pressure switch sends the command to the water pump, and after the pump starts, the water flow switch sends the command to the high-pressure discharger, and the command is sent to the gas proportional valve after starting, and the gas proportional valve starts to start.

The gas proportional valve and the wind pressure switch and the flue gas induction switch are interlocked, the combustion chamber has a certain negative pressure gas, the proportional valve can work, when the flue gas induction switch can not detect the exhaust gas discharge in 5 seconds, the gas proportional valve will be cut off to stop the gas supply, so as to ensure the safe use of gas.

Most of the domestic machines or domestic assembly machines are casing machines, and there are also some large manufacturers out of the board replacement machine, such as small squirrels, most of the original imports are plate replacement machines, but there are also casing machines, such as the charm of Baxi, the casing machine is a large pipe with a small tube, the big pipe is heating, and the small pipe is life, and the winter will implicate each other, resulting in hot water from domestic water hot and cold, just at the beginning. It does not affect the use, the hot and cold is just at the beginning, and this problem will not occur if the plate is replaced, his domestic water is heated externally, in fact, the plate is more likely to scale and clean the machine. In places with poor water quality, it is not recommended to use plate replacement.

The plywood replacement machine of casing machine is basically evenly divided at home and abroad, accounting for half of each. The characteristic of the plate exchange type is that there is a plate heat exchanger (2 heat exchanges), and the high-temperature water that circulates inward during bathing will transfer heat to the bath water at the plate exchange place.

The tube in the casing type heat exchanger is a large pipe casing small tube, the large pipe takes hot water, the small tube takes the bath water, the fire heats the water in the large pipe during bathing, and then the water in the large pipe transfers the heat to the bath water in the small tube.

These two structures can achieve better results, the heating effect of the machine of the same power is the same, and there is a slight difference in the anti-influence of hot water during bathing, such as air pressure, water pressure is unstable due to unstable water temperature. In areas with poor water quality, such as hard water, acid and alkaline water, it is recommended not to use plate changer, and the three-way valve is prone to failure.

Plate changer: uniform heat, not easy to scale, easy to clean and simple, heating and life dual-use, fast response. It is a comfort model.

Casing machine: easy to heat and cold, easy to scale, slower than plate change, belongs to the economical model.

Hello! First of all, one of them is a casing machine, and the other is a version replacement machine, which has been said, your home is 120, although it is slightly more expensive than Beretta, but the quality and technology of Baxi wall-hung boiler are comparable in all aspects.

It is recommended that users choose a casing machine, which is not easy to form scale, and the plate replacement machine will cause scale, which is troublesome to clean and has high maintenance costs.

At present, the wall-hung boilers on the market are divided from the heating mode of domestic hot water, which mainly includes instantaneous type and volumetric type. The instantaneous type model is divided into two types: casing type and plate replacement type. The main differences between these two models are in the following aspects:

1. Principle of heat exchange:

The casing type model uses a casing type heat exchanger, and the domestic hot water casing is nested in the main heat exchanger, and the heating and domestic water are carried out through the main heat exchanger.

The plate exchange model is to add domestic hot water through a plate heat exchanger, the main heat exchanger is only used to heat heating water, the operation of domestic hot water is controlled by the electromagnetic three-way valve, when there is a demand for domestic hot water, the electromagnetic three-way valve will introduce the primary high-temperature water in the main heat exchanger into the plate to heat the domestic hot water.

Second, the technical comparison:

Comfort of domestic hot water and speed of water discharge.

Because the casing type model uses the main heat exchanger to directly heat the domestic water, while the plate exchange model needs the hot water in the main heat exchanger to flow into the plate heat exchanger, and then heat the domestic water. In contrast, the casing model will be able to dispense hot water faster. However, the temperature of the hot water outlet is more stable than that of the casing model.

3. Structure and comparison:

The casing machine does not use plate heat exchangers and solenoid three-way valves, so it is relatively cheap.

Due to the addition of plate heat exchanger and electromagnetic three-way valve, the plate replacement machine is more expensive.