How Do I Choose the Best Air Compressor System?

Air energy refers to the low-grade thermal energy contained in the air. However, according to the second law of thermodynamics, heat cannot be transferred from a low-temperature heat source to a high-temperature heat source without causing other changes. Therefore, air cannot be used without consuming external energy. Heat pump can realize the function of absorbing heat from the air and transferring it to high temperature objects or the environment. This technology is called air source heat pump. The use of heat pumps requires electrical or thermal energy. For example, when the air conditioner in the home is used for heating in winter, it is a typical air source heat pump. However, the air conditioner does not generate heat without using electricity or providing heat. Therefore, the air source heat pump is not driven by air energy, but by electric energy or heat energy. Air source heat pumps can be used for heating, heating and drying.

Air energy

Chinese name: Air energy
Foreign name: Air energy

nickname: Air source
Including: Home machine, business machine

Air energy, which is the low-grade thermal energy contained in the air, is also called air source. The law of conservation of energy tells us that energy cannot be created out of nothing, nor can it disappear. However, according to the second law of thermodynamics, heat cannot be transferred from a low-temperature object to a high-temperature object without causing other changes. Although air energy is inexhaustible, if the energy absorbed in the air needs to be transferred to a high-temperature environment, it needs to consume electrical energy or heat energy. This technology is called an air source heat pump.

This new type of water heater can be divided into two types: household machine and commercial machine; from the working mode, it can be divided into two types: circulating type and direct heating type.

Air energy water heaters can be used in homes, hotels, guesthouses, schools, swimming pools, hospitals, leisure baths, factories, agricultural insulation and drying, and industrial preheating.

Household appliances are similar to air conditioner outdoor units with heat pump hosts and large-capacity pressurized [domestic] / non-pressurized [commercial] insulation

How does an air (heat pump) water heater work?

Most heat pump water heaters on the market are labeled with a maximum water temperature of 60 ° C, but sometimes we need higher hot water temperatures. Can the water temperature be increased? Of course not, the effluent temperature is affected by the refrigerant used by the heat pump water heater compressor. Take R134a refrigerant as an example.

1. The condensation temperature of R134a refrigerant can be as high as 80 degrees. If calculated according to the heat exchange temperature difference of 5 , the highest effluent temperature can reach 75 , but not all conditions can reach 75 . When in a low temperature environment, The condensation temperature needs to be appropriately reduced. When the temperature drops to -15 ° C, it is recommended to control the condensation temperature to not exceed 70 ° C.

2. Compared with the maximum compression ratio of 5-6 for air-conditioning compressors, the compressor for heat pump water heaters can withstand a high compression ratio, which can be more than 10 (safety in the range of 11-13), but the compression ratio cannot be infinitely increased. The compression ratio will increase the local temperature inside the compressor and seriously affect the service life.

3. According to the characteristics of different seasons, design different operation modes of heat pump water heaters. In the spring, autumn and summer, the hot water outlet temperature is set lower, and in winter, the water temperature is set higher. The water temperature of 55 can fully meet the national standard and the needs of consumers. This can not only ensure higher water temperature, higher energy efficiency, but also ensure the safety and reliability of the entire system. However, the ratio of the host machine and the water tank should be noted. It is recommended that 200L be equipped with a 1P host, 200-400L with a 1.5P host, and 400-500 with a 2P host. In this way, the air-energy water heater can not only ensure a sufficient amount of hot water, the hot water can be heated quickly, but also save energy and energy.

After more than ten years of development, the air-source heat pump water heater industry has developed rapidly, with more than 500 manufacturing enterprises. In June this year, it was successfully selected as a national energy saving project and enjoyed a subsidy of up to 600 yuan, further promoting the development of the industry. A very important component of a heat pump water heater-the refrigerant, is directly related to the energy efficiency of the product. South China heat pump water heater refrigerants are mainly R22, R134a, and later some mixed refrigerants came out R415b, R417a, etc., different refrigerants have their advantages and disadvantages.

R22 is very suitable for air conditioning, because the condensation temperature can always be controlled below 45 degrees (because the air temperature is almost always below 40 degrees); but the water temperature of the heat pump water heater is always required to be above 40 degrees, and the condensation temperature is always above 45 degrees , R22 exhaust temperature can easily exceed 85 degrees (easy to crack the temperature of lubricating oil), especially when the air temperature is above 40 degrees. Therefore, R22 used in heat pump water heaters will cause the compressor's lubricating oil to cool poorly due to the high exhaust temperature of R22, and the cracking speed will increase sharply, which will shorten the life of the compressor. And the ODP value of R22 is 0.05, which has a destructive effect on the ozone layer. However, according to the Montreal Protocol, R407C and R410A will be used in place of R22 in Europe from 2004. At the same time, all R410A refrigerants will be used in Japan. The production volume was used as a benchmark. It was reduced to 65% in 2003, 35% in 2010, and 10% in 2015. By 2030, developed countries will completely ban R22, and developing countries will phase out R22 in 2040. According to the refrigerant replacement schedule, China must completely ban the production of refrigerant R22 products by 2040 at the latest.

advantage:

Air energy water heaters mainly require thermal energy from the air, which has the advantages of energy saving, environmental protection and safety of solar water heaters.

Air-energy water heater technology originates from air conditioners, but it is not completely the same as air conditioners. Due to different working environments, the harsh working conditions have high requirements on the quality of the compressor. As far as I know, it can maintain relatively Only Panasonic and Copeland compressors have long service life and high energy efficiency ratios, so it is recommended that you first check what compressors they use when purchasing.

Air energy products have been used in foreign countries for decades, and the technology has matured. Domestic manufacturers are just imitations. The technologies are similar and basically the same. Strictly speaking, as long as you have done air-conditioning, have at least R & D capabilities and experimental equipment such as enthalpy difference room, on this basis, it is easy to improve and match the test, and do a good job of air energy, not as some manufacturers boast. What high-tech. Most of the brands bearing German technology and American company banner are deceiving, don't believe it. It's better not to be superstitious about foreign brands. The so-called American company opened the largest heat pump production base in Jiangmen in the world by the Chinese company Miles of Quality some time ago. It turned out to be only a screwdriver factory without even a minimum of inspection equipment. This is the best proof.

It is recommended to buy air energy water heaters from the following aspects.

I. Technical authority: Check whether the technology of the air energy products company is recognized by the industry, whether it has a government-approved engineering technology research and development center, and whether it has undertaken or participated in national air energy water heater scientific research projects.

2. Reliability of quality: An important indicator for judging the quality of air-energy water heater products is to look at the compressor. The compressor can be said to be the heart of air-energy water heaters. In the application of compressors, Panasonic, Mitsubishi, Emerson and other brands are relatively well-known. Some companies Using domestic air-conditioning compressors, unit performance and life cannot be guaranteed.

Third, the brand's professionalism: For the air energy industry, some brands only make air energy products, some are transformed through other fields, and some are halfway monks. Therefore, when consumers choose air energy brands and products, they must combine the above two points to judge the professionalism and technical maturity of the brand.

Fourth, the superiority of performance: When choosing air-energy water heater products, in addition to comparing the common advantages and data of related industries such as energy saving, environmental protection and safety (this is the function and selling point of all air-energy water heaters), the key point is Comprehensive consideration of other additional properties of the product, such as daily cleaning, maintenance, intelligent insulation performance, etc.

Fifth, after-sales protection: But consumers can not simply trust the warranty period when buying, such as whether there is a special person to inspect and repair from time to time, how many hours to respond for repairs, how many hours for repairs and so on. Today, the industry's well-proven brand service commitment period is: 3 years for home machine mainframe warranty and 5 years for water tank warranty.

What are the advantages of air (heat pump) water heaters?

"Safety + Save Money + Comfort + Environmental Protection + Durability":

1. Safety: No gas, no waste gas, and gas poisoning will not occur; no electric heating rod will be used for heating, there will be no danger of electricity leakage, and the health and safety of the family will be protected.

2. Save money: The COP value is more than 3, and the energy efficiency ratio is high, which absolutely saves electricity and money. It can save 2/3 ~ 3/4 electricity costs, or 1/2 ~ 2/3 gas costs and auxiliary heating costs of solar water heaters.

3. Comfort: Patented technology-over-current indirect heating, full-automatic constant temperature and pressure water supply, when hot water is used, it will never be cold and hot, hot water is under pressure, and it has good comfort. 24/7 water supply, making up for

What are the requirements for the installation location of air (heat pump) water heaters?

Can be installed in bathroom, kitchen,

1. Water circulation type. The body of the water circulation is to put the water pump and heat exchanger into the host, and the heat preservation water tank only plays a role of storing hot water. It is usually installed like a commercial machine on the top of a building or in a relatively loose place. In this way, the circulating water pump is prone to failure. Like a commercial machine, it is easier to maintain when a failure occurs, and the home machine is more difficult to repair, because most domestic machine water pumps are installed on outdoor walls. Integrating the water pump into the case is relatively mature.

2. Inner plate copper tube. For the inner plate copper tube type household machine, the inner plate copper tube type heat exchanger is placed in a pressure-containing heat preservation water tank, and the copper coil tube heat exchanger directly contacts the water for heat exchange. Tap water contains a certain amount of chloride ions, but the chloride ion content does not cause corrosion to copper. In freshwater and seawater environments, corrosion does not occur due to the presence of copper's own oxide film. However, if water in the tank enters the compressor, it will burn the compressor. After entering 2009, basically in the coil section, most manufacturers choose stainless steel 316 as the inner coil, which greatly improves the performance of the inner coil machine to carry corrosion and oxidation in water.

3. External coil type. The external coil water heater is a coil of heat exchange copper tube on the outer wall of the inner liner. The copper tube is separated from the water, so the heat is exchanged between the inner liner and the water. This method has a disadvantage that the heating speed is slow, because the copper tube must first heat the water tank liner, and then cold water. In the end, the air-energy hot water machine does not save energy and power. In addition, the copper tube also heats the heat insulation layer while heating the inner tank, which causes the heat insulation layer to foam twice. If it is used for a long time, it may easily cause the water tank to burst. Although the external coil type effectively prevents the copper tube from being corroded, the refrigerant and water cannot fully exchange heat. At this time, the compressor will be in a high temperature and high pressure state for a long time, which will greatly affect the life of the compressor.

The practices are:

1. The top plate, bottom plate, frame and panel of the unit are all made of stainless steel;

2. Generally, the frame made of angle steel and channel steel should be galvanized, and the painted panels or colored steel panels should be used for the panels and roof panels.

3. The top and bottom plates are made of stainless steel, the frame is made of aluminum alloy, the panel is made of galvanized steel, and the surface is treated with zinc phosphate before baking polyester paint;

4. The top plate is made of stainless steel, the bottom plate is coated with epoxy on the surface of galvanized steel, the frame is made of aluminum alloy, the panel is made of galvanized steel, and the surface is sprayed with PVC.

5. Stainless steel frame and aluminum alloy panel, anti-corrosion galvanized steel plate for the top and bottom plates;

6. Screws, nuts and auxiliary metal materials used in the assembly of air-energy heat pump hot water units are galvanized or made of stainless steel.

Q: Where is the main unit and water tank of the air energy water heater better?

A: The air energy water heater is installed on the balcony and bay window is the best choice. The advantage is that it does not occupy indoor space, is safe and stable, and the entire hot water pipe system will have sufficient hot water. Bay window or external wall can make the host absorb heat from the air as much as possible to improve heating efficiency. It is understood that more than 90% of users will choose this installation method.

Q: The house is under renovation. When is the best time to install an air-energy water heater?

Answer: Installation is best before the plumber enters the site. In order to achieve the best use effect, before the electrician enters the site, professional installation technicians will visit the site to make a survey and develop the best installation solution. After the laying of hydropower is completed, it will be implemented according to a pre-established plan.

Q: Can I retrofit other water heaters in my home with air energy water heaters?

Answer: Yes. Compared with other water heaters, the advantages of air-energy water heaters are obvious. During the transformation, only one of the previous hot water pipes must be connected to the hot water outlet of the air-energy water heater.

Q: Are there any special requirements for the water pressure of the air-energy water heater?

Answer: There are no special requirements for water pressure. The air energy water heater water tank is a pressure-type water tank. As long as the tap water is under pressure, the hot water coming out will be under pressure. There are no special requirements for water pressure.

Q: Are there any special requirements for power cords for air-energy water heaters?

Answer: The air-energy water heater has significant energy saving, and its power is smaller than that of ordinary water heaters, and the power cord for ordinary households can be used.

Q: Are there any special requirements for the installation floor of air-energy water heaters?

Answer: There are no special requirements for floors. The outlet point of the air-energy water heater depends on the pressure of the tap water. If the floor where the tap water can reach, hot water can reach this floor.

Temperature, water consumption

The most appropriate temperature for bathing is 42 ° C. Middle-aged and elderly people can slightly increase the temperature by 1-2 ° C. Water for showering is about 40-50 liters per person. Bathtubs and jacuzzis are determined by capacity.

How much hot water can be made

In terms of product performance and theory, air-energy water heaters-domestic heat pump water heaters, can be reciprocated to produce hot water continuously. At normal temperature, hot water can be produced per hour as follows (45 -55 ): It depends on the size of the unit.

Air energy water heater

In the process of use, there are often some problems encountered, and after detailed analysis, there are corresponding solutions.

First, the compressor loses oil

Analysis reasons: 1. The suction pressure is too low 2. The refrigerant circuit is blocked 3. The thermal expansion valve is opened too little

Solution: 1. Increase the load on the evaporator side, check the suction pipe valve for blockage 2. Leak detection, add refrigerant 3, clean or heat exchange expansion valve

Second, the compressor is noisy

Reasons for analysis: 1. The oil pressure is too low 3. The muffler, the suction and exhaust valve is broken or broken 2. The internal pipeline, the valve parts are loosened, and the vibration 3. The thermal expansion valve is opened too much

Solution: 1. Replace the lubricating oil, muffler, suction and exhaust valve 2. Check and tighten the compressor, pipeline, valve 3. Adjust the opening degree of the thermal expansion valve

Third, the compressor does not stop

Causes of failure: 1. The resistance of the sensor probe is incorrect or the sensor line is broken. 2. The position of the thermostat is incorrect or fails.

Solution: 1. Replace the sensing probe 2. Reposition or replace the thermostat

Fourth, the operation is normal but the heating capacity is poor

Reasons for analysis: 1. Compressor exhaust valve and thermal expansion valve are damaged 2. Lack of system refrigerant or non-condensable gas such as air in the system 3. Defrost controller, time relay failure 4. Leakage in electromagnetic reversing valve 5 2, hydrophilic aluminum flakes are blocked by dust

Solution: 1. Replace or repair or readjust the opening degree 2. Replenish refrigerant after leak detection or replace desiccant, refrigerant, solenoid valve 3. Brush with tap and tap water

Frost on the compressor surface

Analyze the reasons: 1. The thermal expansion valve fails or opens too large 2. The temperature expansion package of the thermal expansion valve falls off 3. The spool of the thermal expansion valve is stuck or the temperature is set improperly 4. The refrigerant charge is insufficient

Solution: 1. Adjust, clean, replace the thermal expansion valve 2. Re-wrap the temperature-sensing package 3. Re-adjust 4. Leak detection, fill leak, and charge refrigerant

People	2-3	3-4	4-5	5-6	6-7	7-8	8-9
Machine	1P 150L	1P 200L	1.5P 250L	1.5P 260L	2P 300L	2P 320L	2P 400L

The best-selling water tanks in the general market are 150L, 200L

Air can see the brand

Choose more common professional brands on the market, because the air energy market is less concentrated and fish and fish are mixed. Manufacturers that previously did solar energy and air conditioning are also selling air energy water heaters, but their research and development and production do not have the professional air energy production conditions. There are a lot of air energy products on the market in 2014. Manufacturers go to which products when they see which products make money. If there is no certain technical foundation support, there will be no guarantee for the products produced, especially for new types of air energy water heaters. Products, so when choosing an air-energy water heater, you must choose a professional, branded product.

Air can see the model

Professional large factories used to have more large-scale projects and models, especially in the cold north, and even in Tibet, where companies with more diverse project projects have more stable products and stronger technology and energy efficiency. The temperature of the water tank is better. This function is designed to take into account the needs of customers. The constant temperature function can ensure that the water during bathing will not appear cold and hot, and avoid scalding the customers, especially for families with elderly and children. Winter hot water demand for households.

Air can see weight

It should be a standard equipment. The main accessories are compressor four-way valve, electrically controlled bushing heat exchanger, fin heat exchanger, etc., but some manufacturers use standard heat, smaller presses and heat exchangers. Equipment, but the direct thermal power of its equipment is far below the marked value. Taking a standard 13-horse direct-heating device (PASHW130SB-2-C) as an example, the standard brick's net weight is 310KG.

Air see service

This is also the most important point. The three-package policy for professional manufacturers of big brands is 6.5 years.

All repairs are free of charge, and the small cottage factory only dares to guarantee it for 2 years because of its product quality and other reasons. The warranty and repair are still essential, but everyone else, Baidu, the difference between the two! Remember. Air energy water heaters generally have two types of integrated machines and split machines. At the start of air energy, customers choose more integrated machines, but one of the disadvantages of integrated water heaters is that it is more troublesome to maintain; so it is not special for the place where the water heater is installed in the home. If it is small, it is recommended to use a split machine, which is conducive to maintenance.

High energy efficiency ratio

The biggest advantages of air energy water heaters are lower operating costs and good energy saving. This is an important reason for the public to choose air energy water heaters. Therefore, when choosing, you must choose an air energy water heater with high energy efficiency.

At the same time, you can refer to the top ten air energy brands and pay attention to the latest developments.

How Do I Choose the Best Air Compressor System?

Air energy

Air can see the brand

Air can see the model

Air can see weight

Air see service

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