Can the water circulation heat pump water heater become the mainstream in the future?

Judging from the company's propaganda slogan, it is also specifically stated that they do not produce fluorine cycle. In the market, we also found that the manufacturers of water recycling household machines are gradually increasing. What is the product development trend of household opportunities of heat pump water heaters? Who will become the mainstream products of fluorine cycle, water cycle and household machine in the future? After ten years of development, the heat pump water heater has a certain market awareness and scale. However, the development of the heat pump water heater industry has indeed experienced a painful process of "imaging while playing". As far as household machines are concerned, manufacturers in the industry have been trying to explore for several years, from the initial built-in coil in the water tank to the later external coil in the water tank (two kinds of fluorine circulation), and now there is no copper pipe in the water tank (water circulation). Looking back on the development of fluorine cycle, the original heat pump water heaters were all built-in coils in the water tank. In 2004, 2005 and 2006, household machines in the whole industry were basically products with built-in coils. But after two or three years of market test, the problem of built-in coil began to appear. Because the copper tube is immersed in high-temperature water for a long time, it bears about 20 kilograms of pressure all the year round, which is easy to produce scale and patina, and the most important thing is easy to leak. Once it leaks, not only the water tank is scrapped, but also the compressor of the main engine is damaged, resulting in the basic scrapping of the whole equipment. Once this happens, the loss of the manufacturer will be great. In addition, the previous mainframe and water tank are basically from different manufacturers. Once this happens, the determination of responsibility is also a matter of wrangling. It can be said that many manufacturers were troubled by this problem at that time. So, in the second half of 2006, represented by several enterprises such as Changling, they began to ponder how to solve this problem. At the beginning, there were two main points. One was to solve the problem of copper pipe leakage without involving the main engine, and the other was to solve the problem of scale and patina. Thus, the external coil was born. The so-called outer coil is to wrap the copper tube around the outer wall of the stainless steel water tank liner, and then heat the water in the liner by transferring the heat of the copper tube to the water tank liner. After several years of development, since 2007, the number of external coils has gradually increased. Many original manufacturers began to change from built-in coils to external coils, especially those who have the ability to produce water tanks independently, and began to produce external coils themselves. Compared with the built-in coil, the external coil does have its advantages, as mentioned above, but it also has its inevitable disadvantages. Because the outer coil wraps the copper tube around the outer wall of the tank liner, it is necessary to heat the tank first, and then heat the water inside. At the same time, because the copper tube is round, the heat exchange area is greatly wasted, so the thermal efficiency is definitely lower. In addition, since the outer coil is wound on the outer wall of the tank lining, the length of the copper tube is two to three times longer than that of the inner coil. In order to reduce the cost, the copper tube used is very thin, and the thickness is basically below 0.4 mm In addition, in order to increase the heat exchange area, the copper tube is flattened, so it also bears a pressure of about 20 kilograms, and the possibility of leakage is much greater. Although water leakage will not bring trouble to the main engine, the maintenance of the water tank is also a very difficult problem. In recent years, we have made such a big technical update for the development of products from built-in coils to external coils, but there are still so many shortcomings and hidden dangers that the whole industry feels a little tired. How to get to the domestic heat pump water heater? In 2008, when everyone was confused. The company, located in nantou town, Zhongshan, figured that the heat circulation between the water tank and the main engine depends on the fluorine flow in the copper pipe, whether it is the inner coil or the outer coil. This can't solve the problem that once the copper tube leaks, it will affect the water tank. At the same time, because the copper tube is relatively thin, there is still a certain probability of leakage. Furthermore, the most important point is that there is a copper tube in the water tank, whether it is built-in or external. Once the compressor leaks electricity, the water in the whole water tank is charged. This safety problem has not been taken seriously by manufacturers, which means that there are potential safety hazards in fluorine circulation. So, can there be no copper pipe in the water tank? The heat circulation between the water tank and the main engine depends on the flow of water? Can you do it? Aren't all commercial machines like this? Next, OneKay began to explore water recycling technology different from fluorine recycling. First, let's see how they work (see figure 1). Schematic diagram of fluorine cycle Click here to view all news photos. Schematic diagram of water cycle Click here to view all news photos. As can be seen from the above figure, the main engine of water circulation is a built-in heat exchanger, and there are no copper pipes inside and outside the water tank. Its installation is only the installation of water pipes and power supply. The installation of fluorine circulation is the connection of water pipe, power supply and fluorine circulation copper pipe. As far as installation is concerned, the installation of water circulation device is simpler than that of fluorine circulation device. Secondly, due to the addition of a heat exchanger and a circulating water pump in the water circulation main machine, the heating process of the unit is completed in the main machine, and the water tank only plays the role of storing water and keeping warm, thus avoiding the possibility that the copper pipe with the built-in fluorine circulation coil is oxidized after being soaked in high-temperature water for many years, forming scale, rusting or even leaking. Because once the copper tube leaks, the refrigerant will penetrate into the water, which is extremely unfavorable to people's health. Therefore, the water circulation will not rust and corrode, which ensures that the hot water we use is clean and safe. In terms of safety, this is actually the most important concern of hot water equipment. We often see casualties caused by gas water heaters and electric water heaters. The circulating water tank is connected with the compressor through an insulated water pipe. Even if the compressor leaks electricity, the water in the water tank will not be charged, which truly realizes the separation of water and electricity and eliminates potential safety hazards. So, there is no harm in recycling water? Of course, in terms of cost, it is higher than the fluorine cycle unit. Take the ordinary unit of 1P 150L for example, the cost of water circulation is more than 500 yuan higher than that of fluorine circulation. After these analyses, as well as several visits to OneKay by foreign merchants, it is proposed that there should be no copper pipe in the water tank. OneKay believes that water circulation is the development direction of heat pump water heaters. Therefore, since 2008, OneKay Company has been working wholeheartedly in the direction of water recycling. Up to now, it has become the most professional manufacturer of water circulation in heat pump industry. In fact, at that time, all the series of Gree household products and the high-end products of Midea household machines, except Angkai, had no copper pipes in the water tank. This also shows from the side that these big companies have discovered the shortcomings and disadvantages of fluorine cycle. Of course, from the current market structure, most products in the market are fluorine recovery products, mainly because of the cost advantage of fluorine recovery. But from the analysis of the working principle, advantages and disadvantages of the product, it is obvious that water recycling has strong advantages. Moreover, from the demand of foreign merchants, it is reasonable for water circulation to become the mainstream of the market. After the gradual renewal and elimination of products and the evolution of market balance, the water circulating heat pump water heater may play an important role in the field of home computers, but whether it can become the mainstream of future home computers remains to be verified by the market.