What is the difference between air energy water heater coil type and circulation type, which one has

There are two types of domestic air source heat pump water heaters: one is fluorine circulation (coil type) and the other is water circulation (including built-in water pump). The main engine of water circulation is the internal heat exchanger, there is no coil inside the water tank, and the water is heated through continuous circulation.

The fluorine cycle is to let the freon transfer heat to the water during the circulation process to heat up the water. There is a forced circulation pump in the circulating main engine, and there is no forced circulation water pump in the coil main engine. Sometimes it is often the pump that breaks easily.

The composition of the water circulation and fluorine circulation unit is composed of the main engine and the water tank, and the installation of the pipe and the power supply, while the fluorine circulation heat exchanger is inside the water tank, and its installation is the connection of the water pipe, the power supply, and the fluorine circulation copper connecting pipe. In terms of installation, the installation of the water circulation unit is simpler than that of the fluorine circulation unit, and the installation and connection requirements of the connecting pipe of the fluorine circulation unit are very high, and the copper pipe must not be broken without leakage, and the emptying after installation must be clean, once there is leakage, the unit will not be able to operate normally, and the fracture of the copper pipe is also easy to cause leakage. The fluorine cycle unit should also pay attention to the connection of water pipes and the connection of power supply.

In terms of water tank, the fluorine cycle unit uses a coil heat exchanger. This kind of heat exchanger is divided into two types: one is the built-in coil in direct contact with water; The other is the coil outside the inner tank. The built-in coil is in direct contact with water, and after a period of use, its surface is prone to limescale, which affects the heat exchange effect.

The heat exchange effect of the inner tank outer coil itself is worse than that of the inner coil, and the thickness of the copper tube should not be too thick, which is easy to cause leakage after processing. In terms of water circulation, the water tank is a very simple pressure insulation water tank, and its heat exchanger is inside the main engine. Heat exchangers are generally shell-and-tube type.

The heat exchange effect is better than that of coil type, and the service life is longer.

The air energy water heater coil (inner coil to be precise) is more thermally efficient than the circulating (water circulation) type. Some air energy manufacturers produce water circulation in order to prevent the inner coil from scaling and perforating in the water tank and damaging the host (the inner coil copper pipe used by cottage and miscellaneous factories is not in accordance with the national standard materials, and the wall thickness does not meet the requirements), but the water circulation has a circulating water pump that starts and stops with the main engine, as long as the host starts the water pump, it will run and work, and the water pump also consumes electricity (about 110w), so the energy consumption and reliability of the pump are also an important consideration index for air energy water heaters.

If I choose a large factory to produce according to the national standard, I still choose the air energy water heater with inner coil.

Air energy water heaters, also known as "air source heat pump water heaters". The "air energy water heater" absorbs the low-temperature heat in the air, vaporizes it through fluorine medium, and then pressurizes and heats it up after compression through the compressor, and then converts it into water for heating through a heat exchanger, and the compressed high-temperature heat energy is used to heat the water temperature.

Air energy water heater has the characteristics of high efficiency and energy saving, making the same amount of hot water, which is 4-6 times that of general electric water heaters, and its annual average thermal efficiency ratio is 4 times that of electric heating, and the utilization energy efficiency is high.

There are two types of Qihui air energy water heaters: coil type and circulating type, and their differences are as follows:

The coil type is to install a control device in the machine to control the amount of water passing through the heat exchanger, and the hot water to be used can be directly output without circulation, similar to the transformation and burning of gas. A direct-heat heat pump can be used without a water tank, similar to a gas water heater, and the water is heated as soon as it passes. It is characterized by time-saving, excessive electricity consumption, and gas is OK.

The circulating type is circulating heating, which heats the water in the water tank through the heat exchanger, circulates repeatedly, slowly heats up, and finally reaches the set temperature. The common water storage tank type water heater basically uses electricity. Inside it's just hot fast.

Summary: Both coil type and circulating type have their own advantages, in fact, the effect is almost the same, according to the installation site to choose the right one.

Need. 1. Hot water circulation energy-saving equipment can be installed with or without embedded return pipes, but the installation method is different, and the use effect is the same.

2. No return pipe: Usually a set of check valves (check valves, only flowing to one side, not backflow) is installed under the wash basin at the farthest point of the hot water pipe, and the cold water pipe is returned to the heat source equipment for heating to achieve the circulation effect.

3. There is a return pipe: during installation, a check valve is installed at the end of the return pipe to connect to the cold water pipe, and the cold water of the hot water pipe is directly pumped back to the heat source equipment for heating to achieve the circulation effect.

4. The return pipe is to connect a pipeline at the end of the hot water pipe to extend to the side of the water pipe, commonly known as the return pipe. The return pipe and the hot water pipe are the same pipe, which is essentially to extend the hot water pipe.

Yes, the water circulation type of air energy water heater has a higher heat exchange efficiency than the fluorine circulation type, but the installation difficulty is simpler, easier, and of course better; However, the cost of the water cycle is higher than that of the fluorine cycle, and the price is also high.

Make a circuit at the end of the hot water pipe to connect to the reserved return port under the water tank, if there is no water outlet, you need to add a tee connection at the position of the tap water inlet (if you need to add a one-way valve on the tap water pipe and the return pipe), add a small circulating water pump before the contact, and control the start and stop of the pump with time and temperature dual control.

Make a circuit at the end of the hot water pipe to connect to the reserved return port under the water tank, if there is no water outlet, you need to add a tee connection at the position of the tap water inlet (if you need to add a one-way valve on the tap water pipe and the return pipe), add a small circulating water pump before the contact, and control the start and stop of the pump with time and temperature dual control.

1. The working principle is different:

The coiled water tank is to install the heating coil of the fluorine system of the water heater in the water tank, there are currently an outer disc type and an inner disc type, the outer disc type is the refrigerant heating coil coiled on the outer surface of the water tank tank, the coil is not in contact with the water in the water tank, and the inner disc type is the refrigerant heating coil directly installed in the water tank, which is directly in contact with the water for heating.

The circulating water tank is actually a simple water storage tank, and the water in the water tank flows through the heat exchanger through the circulating water pump for gradual heating and heating.

2. Different categories:

Split refrigerant circulation inner disc type, the main engine and the water tank are separated, and the heating circulating pipe coil is inside the water tank inner tank.

The integral type is that the main engine and the water tank are a whole (the main engine is on the top, the water tank is on the bottom; Or the inverted can also be).

3. Different advantages and disadvantages:

Advantages of coiled water tanks: fast heat exchange, reduced limescale from direct heating.

Disadvantages of coil water tank: copper pipes are placed in hot water for a long time, which will produce scale.

Advantages of circulating water tank: easy installation, small footprint, small heat loss.

Disadvantages of circulating water tank: usually the number of horses of the main engine is less than 1 horse, and the heating speed is relatively slow.

If it's a home machine, there are several styles:

1. Split refrigerant circulation inner disc type.

The main unit and the water tank are separated. The heated circulating tube coil is placed inside the tank tank.

Advantages: fast heat exchange.

Disadvantages: Copper pipes placed in hot water for a long time will produce scale.

2. Split refrigerant circulating outer disc type.

The main unit and the water tank are separated. The heated circulating tube coil is placed on the outside of the stainless steel inner tank.

Advantage: Reduced limescale from direct heating.

Disadvantages: The heat exchange is not as fast as the inner disc type.

3. Split water circulation plate replacement type.

The main unit and the water tank are separated. There is no coil inside the water tank, and there is a hot water circulation pump inside the main engine.

The main unit and the water tank are connected by pipes, allowing the water to circulate and heat through the system.

Advantages: There is no problem that the above two tanks will face.

Disadvantages: Relatively high manufacturing cost.

Fourth, integral.

The main unit and the water tank are a whole (the main unit is on the top and the water tank is on the bottom; Or the inverted can also be).

Integral, usually there is a coil in the tank (whether it is an inner plate or an outer plate, each manufacturer is customized).

Advantages: easy installation, small footprint, small heat loss.

Disadvantages: Usually the number of horses of the main engine is less than 1 horse, and the heating speed is relatively slow.

I remember that there are two kinds of air energy heat pump water heaters on the market, one is to put the heating pipe in the water tank, and the other is that the water comes out of the machine is hot water, heating cycle heating, and the brand is the second heating. I haven't been in this business for a few years, but I just remember this, and I don't know if it's useful to you.

It's hard to explain, so let's take a look at the schematic data.