The difference between the southern unit and the northern unit of air source water heaterFor air source heat pump, the southern unit is used in the south and the north unit is used in the north. In the south, use the north machine, which is for overkill; in the north, use the south machine, which is called hooliganism!
What is an air source water heater?
Air source water heater (Air-source Heat Pump Water Heater), air source water heater is currently one of the best new energy equipment in the world. Air energy is a kind of low-grade energy that exists widely, is given equally and can be used freely. The heat pump cycle is used to improve its energy grade and used to heat domestic water. Because one part of electric energy can absorb three parts of air energy, it can supply four parts of heat energy. The heating and hot water system is therefore a new energy-saving and environmentally friendly technology with great development and application potential, and it has great practical value.
There are so many air source products, let’s talk about the difference between southern air source water heaters and northern air source water heaters (hereinafter referred to as Nanfang Ji and Beiji).
Let’s talk about Southern Engine first. At present, there are two common Southern Engine Top-blowing machines on the market. One is integrated with heat exchange mechanical cabin, and the other is separated from mechanical cabin and heat exchange cabin.
What is the difference between the two?
Let’s start with the principle of air source heat pump. The compressor draws low-temperature and low-pressure gas refrigerant from the evaporator, and compresses the refrigerant into high-temperature and high-pressure gas through work. The high-temperature and high-pressure gas enters the condenser and Water exchanges heat and is condensed into a high-pressure liquid in the condenser to release a large amount of heat. The water absorbs the heat released and the temperature rises continuously. After the high-pressure liquid is throttled and pressure-reduced by the expansion valve, it is absorbed by the fan in the evaporator. The heat in the surrounding air evaporates into low-temperature and low-pressure gas, which is sucked into the compressor and compressed, and the cycle is repeated to produce hot water.
To put it simply, it is the Southern Engine with an integrated heat exchange mechanical chamber. When the low-temperature and low-pressure liquid is converted into low-pressure gas by the fan in the evaporator, the mechanical parts in the mechanical chamber block part of the exchange with the outside world. The airflow leads to a low heat exchange effect.
However, the top blower with separate mechanical cabin and heat exchange cabin does not have ventilation obstruction during heat exchange. Therefore, in comparison, the top blower with separated mechanical cabin and heat exchange cabin is better than mechanical cabin and heat exchange cabin. The top blower with integrated thermal cabin is better.
So, what are the differences between the top blower and the side blower with separate mechanical cabin and heat exchange cabin?
The heat exchange of the separate top blower has little effect on the internal structure of the fuselage, so the question is, why does the article start with saying that the southern machine is used in the north, which is called a hooligan?
The most intuitive expression of the difference between the north and the south is that the north is cold. So what is the effect of cold weather? Leomon Technology tells you that this impact is huge. When the outdoor temperature is very low, the heat exchange capacity of the outdoor unit decreases, the return air volume of the compressor's normal air return port is reduced, and the compressor power is reduced, and the best effect cannot be exerted. In layman's terms, there is no low-temperature operating condition for Nanfang aircraft in the south, but once it is used in the north, there will be more problems. In the final analysis, it will not heat up in winter.
In addition, it will snow in winter in the north. If the top blower is placed in the north, if another shed is not installed on the top, the air outlet of the fan is facing toward the sky, and heavy snow blocks the air outlet, it will be a matter of minutes.
Is there no cure for the north? Of course not, now the industry has developed a jet enthalpy system, you deserve it!
The jet enthalpy system is a new type of system composed of jet compressor, jet enthalpy technology, and high-efficiency cooler. The combination of these three technologies can provide high-efficiency performance. This is an organic whole, that is, the economizer and high-efficiency heat exchanger formed by the high-efficiency jet enthalpy compressor, high-efficiency subcooler and electronic expansion valve together constitute an energy-efficient jet system
Why is it more suitable for the North to choose a side blower? There are three reasons:
First, the side blowing machine adopts a structure in which the mechanical cabin and the heat exchange cabin are separated, and the heat exchange will not be hindered by the internal machinery, and the ventilation is smooth.
Second, it snows and freezes in winter in the north, and the side blower perfectly misses the opportunity to have close contact with the snowflakes given by the heavens, reducing the risk of the fan not working due to snow accumulation.
Third, the use of jet enthalpy technology, during the heat exchange process of the outdoor unit, the refrigerant gas is supplemented through the intermediate pressure return air injection port, thereby increasing the compressor displacement, and the circulating refrigerant for heating by the indoor unit heat exchanger is increased to achieve Increased heating capacity.
Therefore, the northern side blowing machine is more suitable for cold northern regions! However, some air source heat pump manufacturers use top-blowing machines to manufacture northern machines, which seriously disrupts the market. After all, the price is of course ridiculously low. Why is it low?
One, The cost of the top blower is low. Whether it is sheet metal structure or the heat exchange area of the evaporator, the northern side blower is better than the southern top blower. The northern machine is large in size and the heat exchange effect is also great.
Second, the noise of the southern machine is louder, because its heat exchange mechanical compartment is integrated, so there is no sound insulation cotton, and at the same horse number (5P), the northern machine has two fans on the side, and the southern machine is a fan. In the same heat dissipation situation, the fan of the Northern machine does not need to rotate so fast, and the effect is achieved by rotating slowly, with ultra-low noise. If Nanfang wants to dissipate heat, the fan keeps blowing. The faster it turns, the noise will naturally become louder.
Third, the structure of the southern top blower is not suitable for harsh climatic conditions such as cold and snow in the north. The top blower heat pump has frequent heat exchange and frosting in a low temperature environment, slow heating, and the water temperature cannot reach the desired effect. , Energy efficiency is lower than COP!
Therefore, if you sell the top blower to the north, what does it mean to be hooligan? ! In short, you get what you pay for. Have you learned from the north?