PART 2 of Air Conditioning Buyer's Guide Download the Buyer's Guide (PDF 702KB)
Bobiller supply professional and honest service.
Choosing the right Panasonic air conditioner for your home needn’t be a daunting task. Panasonic has a range of reliable air conditioning units, including cooling, reserve cycle, room-only and ducted systems, to suit any home design and budget. Panasonic’s intelligent air conditioning technologies ensure maximum energy efficiency, pure air quality and precise temperature control, plus they are designed to work with your home’s natural air flow and temperature range to create the perfect climate. With a Panasonic air conditioner you can be confident that your home will be comfortable and inviting all year round. Simply use this guide to assist you when making the decision to purchase the ideal air conditioning unit to suit your home.
Cooling only air conditioning units are ideal for tropical climates or homes with gas heating. Reverse cycle units, on the other hand, offer both cooling for summer and heating in winter to make your home the perfect temperature all year round. The type of unit you need is therefore dependent on your individual requirements as well as the climate in which you live.
In principal, the ceiling height and floor area of the room will determine the capacity of the air conditioning unit that you need – the larger the room, the larger the capacity of the air conditioning unit. If the air conditioning unit is too small, it will not be as effective or energy efficient, as it may use a higher amount of energy to cool or heat effectively. For wall split systems, you can use the Panasonic Air Conditioning Sizing Wizard to easily work out what size air conditioner is right for your needs.
Areas without wall or ceiling insulation will require more capacity to air condition than an insulated room. This is because an insulated area retains heat in winter and repels heat in summer, as heat is unable to transfer through the roof or walls of your home. Insulation improves your air conditioner unit’s energy efficiency as it won’t need to work as hard.
Windows also affect the natural temperature of the room, so their size and position should be considered before installing an air conditioning unit. The aspect or direction the windows face (i.e. west facing, direct afternoon sun or east facing, direct morning sun, etc.) will impact the ambient temperature. Also, window coverings (blinds or curtains) can reduce the loss of heating/cooling from the room, compared with windows with no (or lightweight) coverings. Knowing the impact of the windows on a room will assist in determining the right air conditioning unit. So, once you have the measurements of the room, make sure you note down the height and width of your windows too.
The Australian standard measures the capacity (heating and cooling power) of air conditioners with Kilowatts (kW). This is a measure of an air conditioners output capacity; as in the amount of heat that will be removed (cooling) or added (heating) to the room/s in your house. These measurements are shown on the Energy Efficiency Rating label found on all air conditioners as Capacity Output kW and Power Input kW.
If internal and external noise is an important factor for you, you should be sure to check the noise level rating. Panasonic air conditioners are amongst the quietest in the world!
With a split system there are two separate units – an outdoor unit that is placed in an area with plenty of airflow and an indoor unit that is fixed inside the home. Ducted systems have an outdoor unit and a concealed indoor unit, and deliver air through ducting pipes (usually in the ceiling) into each room via vents on the floor, wall or ceiling.
Hot Australian summers call for air conditioners that can cool an entire room quickly and then maintain and steady and comfortable temperature. Panasonic air conditioners can now achieve that aim better than ever thanks to iAUTO-X technology and Aerowings blades. iAUTO-X offers 15% faster cooling than previous Panasonic models with a new compressor and fan design. The ‘Aerowings’ blades on the unit then control the airflow to provide ‘Shower Cooling’ to minimise any uncomfortable direct airflow chill for optimum comfort.
WATCH ON YOUTUBE: iAUTO-X and AEROWINGS cool faster and smarter.
ECONAVI’s intelligent sensors detect unconscious waste of energy using the Human Activity Sensor and Sunlight Sensor. These sensors monitor human location, movements, absence and sunlight intensity and then automatically adjust power output to save energy while providing uninterrupted comfort.
WATCH ON YOUTUBE: ECONAVI intelligent sensor technology.
The Energy Efficient Rating was introduced to give consumers independent and standardised energy efficiency information to compare the performance of domestic appliances on an easy-to-read label.
The Energy Rating Label has two main features:
For more info visit www.energyrating.gov.au.
Because an air conditioner has two components – an indoor and outdoor unit – you will need to consider where both will be installed in your home when selecting your air conditioning unit. Given the indoor unit will be a fixed feature in your house or apartment, the aesthetic appearance is important. Choose your air conditioning unit wisely to ensure the design complements your home.
Make sure there is plenty of room around the outdoor unit so air can freely flow in and out of it. If you live in an apartment or in high density housing, ensure you have ample area for the outdoor unit to be installed.
Please consult with your local city council for any installation guidelines prior to making your purchase, as you may be required to have your local council’s approval prior to installation.
For the best professional result and peace of mind, we recommend you have your new air conditioning unit installed by an Australian Refrigerating Council (ARCtick) licensed installer. The best reason for using a licensed ARCtick installer is that most manufacturer’s warranty’s will cover mechanical parts and labour only, not faults caused through installation.
You are now ready to choose the perfect Panasonic air conditioning system for your needs. From wall split models designed to treat individual rooms through to cassette and ducted solutions for your entire home, you are sure to find Panasonic has just the right product for you.
PART 2 of Air Conditioning Buyer's Guide Download the Buyer's Guide (PDF 702KB)There are many types of HVAC (Heat, Ventilation, and Air Conditioning) compressors, but you can only choose one for your system. Making the right choice from the beginning is
important because once your HVAC system is completely set up, it is best that you stick to the compressor type you started with.
Even if you have an existing system and would like to change the compressor, it’s advisable that you know the various air compressor types before making a decision.
In this post, we will help you navigate the world of compressors, highlighting the different types, their working principles, pros, cons, and additional information that can help you make an informed decision.
An air conditioner compressor is the most vital component of the system because it facilitates the cooling cycle by circulating the refrigerant to all other parts of the system. Basically, it compresses the refrigerant as it enters into the cooling or heating system to increase its overall temperature. Once the system is heated, the gas leaves the compressor to the condenser, which is the place where the cooling process begins.
The compressor works the most; it’s the heart of the whole system. In fact, when other parts of the HVAC system are faulty, the compressor works harder to compensate for their functions, which unfortunately reduces its lifespan. But this doesn’t work the other way. When the compressor is damaged, the whole HVAC system stops working.
Thankfully, compressors manufactured nowadays are highly reliable and easy to service. With a routine maintenance schedule by a professional, you can expect your compressor to perform efficiently for longer years.
While there are different types of HVAC compressors, they perform the same function but have varying working principles. Let’s take a look at the common types, highlighting the distinctions between them:
This is the most popular air conditioner compressor type. It was one of the first compressors invented; however, the design constantly improves as better technology and materials are discovered.
Reciprocating compressor is a positive displacement machine with intermittent airflow, meaning that it’s best used for applications that don’t require a continuous flow of air. However, this can be remedied by using a receiver tank that stores air for when continuous airflow is needed.
This compressor works on the principle of Boyle’s law, which states that “the absolute pressure released by a given mass of an ideal gas is inversely proportional to the volume it occupies if the temperature and gas remain the same within a closed system.”
This compressor typically consists of 3 parts: the piston, crankshaft, and cylinder.
The piston is connected to the crankshaft by a rod, and as the crankshaft makes rotational movement, the piston is pushed back and forth inside the cylinder. This rotational motion allows the refrigerant to be absorbed into the cylinder, compressed, and discharged out of the cylinder. During this process, two sub-components, the suction valve and the discharge valve, help prevent the refrigerant from escaping the cylinder.
When the compressor is drawing in air, the piston escapes from the discharge valve and creates a vacuum effect, which reduces the pressure in the cylinder to be lesser than the suction pressure.
During the compression stroke, the piston goes back to the discharge valve, compressing the refrigerant and increasing the pressure in the cylinder. When the pressure in the cylinder is above the suction pressure, the suction valve will forcefully close, caging the refrigerant inside the cylinder.
On the other hand, when the pressure in the cylinder increases above the discharge pressure, the discharge valve is forcefully opened, giving room for the compressed air to leave the cylinder.
● Great for intermittent airflow operations
● Very efficient in low to moderate compression ratio applications
● Lower initial cost compared to other compressors like rotary compressor
● Has a simple construction, which makes maintenance straightforward
● Can be used in any environment, including clean and dirty
● Produces significant noise and vibration during operation
● Not efficient for handling high-demanding applications
● Requires a receiver tank for continuous airflow
● Requires downtime to cool because of heat caused by friction
● Shorter lifespan
The rotary compressor is the next type of compressor you will most likely find in air conditioners and heat pump types. It’s portable and quiet, making it a preferred choice for locations without noise pollution, such as offices, residential homes, and hospitality buildings. Unlike reciprocating compressors, rotary compressors supply continuous air, thereby reducing the additional cost of buying and setting up a receiver tank.
This compressor is sometimes referred to as “helical screw compressor.” This is because it comes with two meshing helical screws (also known as rotors) that run in opposite directions to compress the refrigerant. The rotors are configured to have grooves, which allows air to move freely through the compressor.
Also, the rotors are meshed and fitted into the compressor chamber with very close tolerances. The space between the rotors is sealed with oil or specialized materials, preventing air from escaping through the mating surfaces. When the rotors begin to spin, air is forced through the chambers and trapped into a smaller space. As the rotors continue to rotate, the air is continuously compressed.
The rotary compressor can be oil-injected or oil-free. The former uses oil for lubricating and cooling the rotors, which helps reduce friction and elongates the compressor's lifespan. Whereas the latter operates without oil in the compression chamber. Instead, it uses specialized materials and coatings to ensure proper sealing and minimize friction.
● Perfect for continuous airflow operation
● Suitable for environments that demand quietness
● Don’t need air receiver tank
● Great for industrial and high-demanding applications
● Longer lifespan
● Higher initial cost
● Can only be repaired by a skilled and experienced professional
● Must be used in a clean environment
Also known as a scroll vacuum pump, this compressor is a positive displacement type that only produces intermittent air. There is often a debate about scroll compressor vs reciprocating compressor, especially since both are only suitable for applications requiring intermittent air supply.
One of the reasons why people prefer scroll compressors is their simple design structure, as they feature two interleaving spiral-shaped parts: a fixed scroll and an orbiting scroll. It’s also beneficial when a compact and low-noise compressor is needed.
The fixed and orbiting scrolls are identical and work together. While the fixed scroll is joined to the compressor housing, the orbiting scroll is attached to the crankshaft, then both are locked together.
As the orbiting scroll receives power from the crankshaft, it moves, thereby forming a pocket of space between the two scrolls. As the orbiting scroll continues to move at higher speed, the size of the pocket reduces, resulting in the compression of air trapped inside.
This whole process is continuous, smooth, and produces lesser torque variation, making the operation very quiet. Hence, even though scroll compressor is a newer compressor, it is fast gaining popularity.
Scroll compressors usually come in two kinds: radially scroll compressors and axially compliant scroll compressors. In the former, the scrolls move outwardly from the center, creating varying-sized pockets to trap and compress air. In the latter, the scrolls move linearly, compressing the gas by reducing the size of the pockets formed.
● Scroll compressor has a simple design that helps reduce energy consumption
● Higher energy efficiency
● Doesn’t have many moving parts, making it last longer
● Can operate without oil, which helps to eliminate oil contamination in compressed air
● Low Noise and Vibration
● Requires little to no maintenance
● Higher initial costs
● Repairs are more challenging, requiring specialized knowledge and tools
● Not suitable for extreme operating conditions
This is one of the different types of AC compressors used in large buildings where continuous cooling is required. Over the years, it has gained popularity for its reliability, low maintenance, and efficiency in handling large volumes of air.
A screw compressor comes with two helical rotors (male and female) that are meshed closely without touching each other. These rotors are quite large, making them capable of moving a large volume of air from one end to the other. As the rotors revolve, the space between them shrink, making the air to be compressed.
This air conditioner compressor type can be designed to be oil-injected or oil-free, making it suitable for a wide range of applications, including sectors where oil contamination is taboo, such as the pharmaceutical industry.
Both rotors must be in good shape for the compressor to work efficiently. As they rotate, the screw compressor draws in air through the inlet. Continued rotation reduces the space between them, causing the air to be compressed within the chamber. Then, the air is moved toward the center of the rotors before exiting the compressor through the central discharge port located at the end of the rotors.
For the oil-injected screw compressors, lubricating oil is applied to the compression chamber not just to prevent friction but to seal and cool the compressed air.
● Wide capacity range. Can handle both small and large air volume.
● Higher energy efficiency, especially when handling large air volume
● Affordable for individuals on a tight budget
● Provides continuous and smooth air delivery with less pulsation
If you want to learn more, please visit our website Panasonic Compressors.
● Perfect for various applications, including commercial and industrial purposes
● Loud noise and vibration
● Design complexity with many intricate parts
● Increased maintenance requirements
The centrifugal compressor stands out among the various HVAC types of compressors. It is greatly beneficial for extra-large HVAC systems. In fact, it’s most perfect for industrial applications.
Centrifugal compressor is designed to function efficiently at high speed. Thus, the higher the speed, the better the pumping efficiency. Another differential element about this compressor is that it has fewer moving parts (no valves, pistons, or cylinders). The only wearing parts that require frequent care and maintenance are the main bearings.
Its working principle involves using the principle of dynamic compression, which has to do with converting energy from one form to another in increasing the pressure and temperature of refrigerant. The major component of this compressor is the impeller (or a disk with radial blades), which spins the absorbed air.
Basically, it uses centrifugal forces to draw in air, then spins the air quickly using an impeller in the compression chamber. The air gains velocity in the chamber and is compressed as it gets to terminal velocity at the outside edge of the impeller. After this, the compressed air goes to the condenser.
● Well-suited for extra-large HVAC systems
● Higher energy efficiency
● Has fewer moving parts, meaning lower maintenance requirements
● Oil-free operation
● Provides continuous and smooth airflow
● High initial costs
● Very complex design
● Requires specialized knowledge for maintenance and repairs
This is one of the different types of air conditioning compressors that use the reciprocating operation mechanism. In other words, it works on the principle of reciprocating motion.
A piston compressor can be constructed in single-stage or double-stage piston. For the single-stage piston, the air is compressed in a single stroke. Whereas, in the double-stage piston, air is compressed in two strokes. Firstly, it’s compressed to a medium pressure, then to a higher pressure. The double-stage piston provides better efficiency and higher output.
Typically, piston compressors have three major components which are the cylinder, piston, and crankshaft. The cylinder is made of metal, opened at one end but closed at the other. The piston is a metal disc inserted to fit into the open end of the cylinder. The crankshaft is connected to the piston, controlling it back and forth.
When the crankshaft pulls the piston forward, it results in a vacuum in the cylinder and absorbs air through an intake valve. On the other hand, anytime the piston is pulled backward, it compresses the air and then forcefully pushes it out through a discharge valve. This process happens one after the other, thereby resulting in an intermittent airflow.
● Suitable for individuals on a low budget
● Simple and compact design
● Not difficult to maintain
● Can handle varying demand levels
● Not good for applications that require consistent airflow
● High noise level
● Requires frequent maintenance
● High oil contamination
This is one of the most efficient air compressor types. It offers high power with great cooling capacity, which is necessary for applications with large cooling requirements. The Vane compressor operates on the principle of rotary motion, with the major component being a rotor with multiple vanes mounted eccentrically inside a stator.
As the rotor spins, centrifugal force pushes the vanes outward against the stator wall, creating individual chambers between the vanes and the stator. Following the rotors' continual rotation, the chambers' volume is reduced, resulting in the compression of the air trapped inside. When done, the compressed air is discharged through the outlet ports to cool the building.
There are various kinds of vane compressors. While some are designed to use oil for lubrication to reduce friction and wear between the few moving parts, others are designed to be oil-free. Meanwhile, some other kinds are constructed with variable inlet guide vanes that help improve efficiency by adjusting the absorbed air.
Vane compressors have fewer moving parts and are quieter than some other compressors, such as reciprocating and piston compressors. This makes them less prone to failure, especially as they don’t have delicate parts that can break easily. They are also ideal for environments where sound is an issue, such as hospitals and offices.
● Low noise and vibration
● Compact design with fewer moving parts
● Less prone to failure
● Continuous operation without pulsation
● Higher energy efficiency
● Can be expensive
● Certain designs require specialized professional attention
● Some kinds of vane compressor are only suitable for specific applications
This is another common compressor used in heat pumps wholesale production. The open compressor is driven by an external power source, an electric motor, an engine, or even a turbine. It has a shaft that protrudes through the compressor housing. Therefore, a seal is used to stop the air from escaping through the housing.
Open compressor is popularly characterized among different types of HVAC compressors by its simple design and straightforward operation. Typically, it features components similar to those of the reciprocating compressor. Air is drawn in via an inlet valve, compressed through the movement of the piston, and discharged through an outlet valve.
● Simple and straightforward design
● Very cost-effective
● Easy to maintain
● Ideal for intermittent airflow demands
● Lower efficiency compared to advanced types of HVAC compressors, such as rotary and centrifugal compressors
● High noise and vibration
● Only suitable for low-demanding applications
The hermetic compressor has the same working principle as the open compressor, but their structure is quite different. With the hermetic compressor, the shaft couplings and external shaft are precisely designed to be contained in the compressor properly.
Typically, a hermetic compressor functions efficiently by maintaining a fully sealed system. All the HVAC parts, including the motor and compressor, are enclosed in a single housing to stop air leakage. This design enables a continuous and reliable operation without the need for external maintenance.
● Integrates the motor and compressor into a single unit
● The outer shell protects the system and ensures a complete seal
● Minimized vibration and noise
● Maintenance-free
● Some kinds of hermetic compressors are designed with internal cooling systems for temperature regulation
● The enclosed design makes repair very challenging
● The design limits the availability of external cooling options
● High initial and repair costs
The semi-hermetic compressor is a reliable option recommended by air conditioner and heat pump manufacturers for customers having difficulty choosing between open and hermetic compressors. It strikes a balance between both compressors, as the sealed housing is designed to be opened to repair or complete overhaul.
Typically, the semi-hermetic compressor operates with a degree of sealing, combining the characteristics of both open and hermetic compressors. This all-in-one compressor allows for limited access and potential serviceability.
● Can be opened for maintenance or repairs
● The enclosed motor and compressor allows for a compact design structure
● Reduced noise and vibration
● Better energy efficiency compared to hermetic compressors
● Doesn’t allow for same level of reparability as open compressor
● More expensive
Deciding which is the best among the different HVAC types of compressors largely depends on the production process, features, and benefits. The best heat pump and air conditioner compressor type is designed with quality raw materials and advanced production processes, with strict compliance with industry standards. It’s advisable that you buy from reliable heat pump manufacturers in China like SPRSUN, which uses Panasonic DC Inverter Compressor and DC Inverter Fan Motor to manufacture HVAC.
SPRSUN produces various types of HVAC systems, including R290 air to water heat pump, which is professionally configured to meet stringent eco-friendliness, efficiency, stability, and quietness requirements. The HVAC systems are also equipped with brushless fans and sound insulation measures for the reduction of noise and vibration, making them suitable across all environments.
Choosing the right type of compressor for your HVAC system is influential to its efficiency and overall performance. Here are some vital points to help you choose rightly:
● Understand Your System Requirements: Evaluate the specific requirements of your HVAC system and compare it with the capacity of compressors available. Factors to consider include the cooling capacity, load variations, and operating conditions.
● Size: Be sure of the size of the compressor. It’s best that you check your HVAC system for the accurate size of the compressor that will fit in. Oversized or undersized compressors can lead to inefficiencies and increased energy consumption.
● Application: While discussing the different types of HVAC compressors above, we highlighted that some are ideal for low-demanding applications while others are best suited for high-demanding purposes. Therefore, choose a compressor that suits your application, either residential, commercial, or industrial.
● Energy Efficiency: The best compressors have high Energy Efficiency Ratios (EER) and Seasonal Energy Efficiency Ratios (SEER) ratings. These types of HVAC compressors offer better performance.
● Maintenance: Consider the difficulty of maintaining and repairing the compressor. Air compressor types like scroll, piston, and open compressors are easy to maintain, but others like screw and centrifugal compressors are challenging to maintain and repair.
● Noise Level: Check the level of noise and vibration the compressors generate when working. More attention should be given to this if you intend to use the compressor in an environment that demands optimal decorum.
● Costs: Compare the initial costs vs potential long-term energy savings and maintenance costs. Energy-efficient compressors are the best. Although they may have higher upfront costs, they help save money over time.
Great strides have been made to satisfy the varying needs of customers regarding the most suitable HVAC compressor. The result is the availability of different types of HVAC compressors, allowing users to find an option that fulfills their requirements. With each compressor’s working principle, pros, and cons, there is uniqueness, making it easier to make an informed buying decision.
Ultimately, the decision on which is the best among the various air compressor types is dependent on how clear you are in what you want, as well as the requirements you are ready to compromise.
Reference：
https://en.wikipedia.org/wiki/Rotary-screw_compressor
https://www.sciencedirect.com/topics/engineering/rotary-compressors
Are you interested in learning more about Heat Pump? Contact us today to secure an expert consultation!