Spiral compressors belong to volume compressors, i.e. The compression of the refrigerant occurs due to the reduction of the volume in which the refrigerant is located. This is a completely new type of compressor, which is currently increasingly used in air conditioning systems and in refrigeratorsah a cooling capacity of up to 40 kW.
Structurally, the working element of the spiral compressor consists of two invested alone into another spirals (Fig. 5.20). One of the spirals is installed motionless, and the second makes an eccentric movement. All processes inherent in bulk compressors (for example, a piston compressor) - suction, compression, discharge - are implemented in the cavities, it is formed between the surfaces of the spirals. The principle of operation of the spiral compressor is shown in Fig. 5.21. A distinctive feature Spiral compressor is the absence of suction injection valves and practically absence
dead volume. In the process of suction (Fig. 5.21, a), the refrigerant from the evaporator fills the expanding cavity between the fixed (black line) and the movable (gray line) with spiral compressors. The reference direction of the refrigerant is shown in the figure of the arrow. Further movement of the movable helix cuts out the volume filled with a refrigerant, from the suction line (Fig. 5.21, b). In the process of moving the movable spiral, the cut-off volume moves to the central part of the spirals (Fig. 5.21, B, d), while the volume decreases and the increase in pressure. Having reached the central part, the compressed refrigerant is supplied to the discharge nozzle (position g) and then into the condenser of the refrigerator.
The number of spiral turns, their shape and the radius of moving the movable spirals are selected so that at the same time the compressor process is implemented in six cavities and the process of injection of refrigerant is almost continuous (Fig. 5.21, e).
A structurally spiral compressor can have a vertically located electric motor located in a hermetic casing. In the upper part installed fixed and movable spirals. The compressor is equipped with nozzles for connecting to suction lines (to evaporator) and discharge (to condenser).
The lack of moving reciprocating parts significantly reduces the level of vibration of the compressor and noise. High efficiency and simplicity in operation in operation contribute to an increase in the number of compressors of this type for refrigeration machines and air conditioners.
Benefits:
1. The absence of suction and injection valves.
2. There is practically no dead volume.
3. The injection process is almost continuous.
4. Low vibration and noise.
5. High efficiency and simplicity in service.
6. Stability of work when entering the compression zone of mechanical impurities, wear products or liquid refrigerant.
7. Small mass and dimensions.
Disadvantages:
1. Complex technological manufacture.
Principle of operation, device and features of refrigerating spiral compressors Copeland. Increased energy efficiency and other advantages of Copeland spiral compressors compared to other refrigerator compressors.
Read more about Copeland Spiral Compressor Models
Specifications and prices for hermetic medium temperature spiral compressors Copeland Scroll Series Zr (R407C)
Specifications and prices for sealed medium-temperature spiral compressors Copeland Scroll series ZP (R410A)
Specifications and prices for sealed spiral compressors Copeland Scroll series ZPD and ZRD
Specifications and prices for sealed spiral compressors Copeland series ZH
Specifications and prices for sealed spiral compressors Copeland series ZB
Specifications and prices for hermetic spiral compressors Copeland series ZF
Specifications and prices for digital compressors Copeland Scroll Series ZFD and ZBD
On the spiral compressors in general and about the spiral compressors of Copeland in particular
For the first time, such a simple compression type was patented in 1905. The movable spiral, coordinatedly moving towards the fixed spiral, creates a system from the cresidal areas filled with gas between these spirals (see Fig. 1).
During the compression process, one helix remains stationary (fixed), and the second commits orbital (but not rotating) movement (orbital spiral) around the stationary spiral. As such a movement is developed, the area between the two spirals is gradually pushed to their center, at the same time reducing in volume. When the area reaches the center of the Spiral, the gas that is now high pressure, is pushed out of the port located in the center. During compression, several areas are compressed at the same time, which allows the compression process smoothly.
And the suction process ( exterior Spirals), and the injection process (inner part of the spirals) is carried out continuously.
1. The compression process is carried out by the interaction of orbital and stationary spirals. Gas enters the external regions formed during one of the orbital movements of the spiral.
2. In the process of passing gas to the cavity of the spirals, suction areas are closed.
3. T. K. Movable Spiral continues orbital movement, gas is compressed in two constantly decreasing areas.
4. By the time the gas reaches the center, the discharge pressure is created.
5. Typically, during operation, all six areas filled with gas are located in various stages of compression, which allows the processes of suction and discharge continuously.
Copeland spiral compressors first appeared in the refrigeration market of Russia and the CIS countries in the early 90s of the last century. Copeland spiral compressors have found applied in all major air conditioning systems, including split and multi-split models, floor versions and chillers, ruffle ( roof air conditioners) and heat pumps. Typical use is air conditioning in apartments, on ships, factories and large buildings, also on PBX, in cooling processes and transport. Refrigerated spiral compressors are widely used in compressor condenser units, in the "remote cold" systems of supermarkets, in industrial cold and in transport installations, including containers. The cooling capacity limits for spiral compressors are constantly expanding and are currently approaching 200 kW when using a multicompressor station.
This model range has both the standard set of compressor properties and new additional functions. Such a set of features has no analogues among other types of compressors. Copeland spiral compressors are presented in the power range of 2 ... 15 hp (on the built-in electrical / engine). The main features of such compressors include: a wide operating range, efficiency, comparable with semi-hermetic compressors, and superiority over hermetic models with low-temperature use, smooth operation, allowing permanent compression and reduced number of moving parts, high reliability achieved by exclusive design Copeland Scroll ™. Advantage in Majabar Rate: Copeland Spiral Compressors occupy 1/3 of the supporting surface of the equivalent semi-hermetic model of the compressor, and their weight is 1/4 of its weight. In spiral compressors of moving parts less than in piston. Because of this, they have increased reliability and can be used in a wider operating range. Optimized for work at low, medium and high temperatures Boiling series of refrigerated spiral compressors "Copland" more and more piston compressors. In the spiral compressors "Copward" series Zr uses electric motors for 50 and 60 Hz. Spiral ZR compressors are adapted for HFC and HCFC refrigerants, and the full range of Zr can be supplied with mineral and synthetic oil.
It is believed that spiral compressors are applicable only in air conditioning, and only semi-hermetic piston or screw compressors are suitable for operation in the low-temperature region. Yes, this statement is valid for most of the world's existing spiral compressors. But not for Copeland compressors. Many product distributors of competing firms pay universal attention to the fact that the spiral compressor is intended only for high or, in extreme cases, average temperatures. Probably, they mean the compressors that they supply themselves without being able to purchase equipment with wider capabilities. Or, that, too, probably, such statements are a simple trick in a competitive struggle for the minds of those who have not yet been dedicated to the details. internal device Spiral compressors of various firms, and also knows nothing about their comparative advantages / disadvantages.
The uniqueness of Copeland spiral compressors consists in the possibility of painlessly injected liquid (or vapor) refrigerant directly into spiral cavities in the middle of the compression process. Such an opportunity does not have most other spiral compressors in view of the serious differences in the design. Copeland, being a pioneer in the industrial development of spiral technology on a global scale (the world's first serial spiral compressors have come off the conveyor of the new specialized Copeland plant in the USA in 1987), first patented in a number of countries the most interesting technical solutions that allow liquid injection For intermediate cooling in low-temperature modes directly into the compression zone, without reducing the working resource of the compressor. Due to this, the low-temperature spiral compressor Copeland is practically the only one in the world can safely operate at boiling temperatures minus 35 ... minus 40 ° C (R22 or R404a) and at normal condensation temperatures + 30 ... + 50 ° C. In this way, technological process Freezing using the low-temperature spiral compressor Copeland is the realities of today. This technology is already opposed and successfully applied in Russia, Ukraine and other CIS countries.
Those specialists who already have their own practical experience in the operation of low-temperature coppeland spiral compressors, well know that no other compressor of any type (including piston, rotary, screw and even turbocharger) does not enter the specified low-temperature mode as fast as it happens with spiral Copeland compressor. So those consumers who are required by the fastest pace of frost, can say Copeland thanks for the low-grade spiral compressor.
The second generation of refrigeration spiral compressors "Copland" series ZB and ZF with a pair of injection is intended for exploiting in medium-temperature and low-temperature modes with the industry best in the industry in efficiency during the year. Row ZB with drive power from 2 to 30 hp and zf from 4 to 15 hp Designed to work with refrigerants R22, R134A, R404A and R407C. The presence of three times smaller number of moving parts in comparison with traditional semi-hermetic piston compressors, a built-in system of protection and mechanism of coordination of spirals provides significant tolerance towards a liquid refrigerant, it allows us to talk about the excellent reliability of this series of compressors in general.
Other important advantages of spiral compressors "Copward" are work when low temperaturesah condensation, providing excellent annual efficiency of operation, a wide operating range and a decrease in dimensions for better adaptability to the required application. Particularly suitable equipment for many evaporative refrigeration systems requiring control of cooling capacity, are the ZBD spiral compressors for the average boiling and zfd temperature with a pair injection for low boiling temperatures.
The digital spiral compressor "Copward" provides smooth control of performance in the range from 10 to 100% with a simple mechanical system and ensures accurate control of the boiling pressure and temperature at any load. Digital spiral compressor "Copward" does not require complex electronic control And easily integrates in the refrigeration system. The compressor electric motor always works at a constant rated rotational speed, which provides high reliability and guarantees efficiency. internal system Lubricants.
Comparison with other types of compressors
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Low-temperatures spirals compressors Copeland. |
Other types of compressors of any known world manufacturers |
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High feed coefficient and refrigerator coefficient in optimal for a given model Row Region pressures (temperatures) of boil in combination with conventional pressures (temperatures) condensation \u003d\u003e with the same cooling capacity consumed power below |
Most piston hermetic and semi-hermetic (except models of a series of Copeland Discus), rotary, screw and centrifugal compressors have the worst indicators in mind one or more factors below: "Dead" volume, losses in valves, big internal thermal losses, high efficiency only in relatively narrow region of compression degrees, etc. \u003d\u003e at the same cooling capacity power consumption above |
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The possibility of using one model in a wide range of boiling temperatures from minus 40 ° C to + 7 ° C (for R22 or R404a) \u003d\u003e for various applied tasks only one type of model is required. (low-temperature!) \u003d\u003e Optimization warehouse stocks: less models - less spare parts |
Most other types of compressors have clear division on low and medium-temperature models \u003d\u003e for various tasks required some different types models (2 or even 3 type!) \u003d\u003e Warehouse reserves are too large - more spare parts are required |
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Relatively big drive power excluded overheating of the electric motor at output to mode. Above reliability. No need to protect the engine low-temperature compressor high Pressure Work (temperatures) boiling \u003d\u003e not required TRV with MOP \u003d\u003e technological function tasks are solved much faster for the rapid focus on the evaporator in starting a compressor and exit safe mode of operation (for example, freezing of the product will be much faster; Ready product will be more high quality) |
Due to the relatively low drive power low-temperature piston compressors an artificial limit is required maximum pressure (temperature) of boil which is usually implemented using the TRV with function mop \u003d\u003e TRV required with a function MOP \u003d\u003e due to the low feed of refrigerant in evaporator until the maximum achievement maximum boiling pressure (individually for each compressor) refrigeration (freezer) installation comes to the specified mode very slow \u003d\u003e quality loss frozen products due to violation frost speeds |
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The starting current is practically no different from worker (compressor starts completely internal mechanically unloaded) \u003d\u003e minimal \u003d\u003e Compressor contactors may have less power, and the protective electric device must be (!) less powerful. Saving electricity at a start. |
Other types of compressors have elevated or very high starting current even when application of mechanical unloading devices \u003d\u003e adverse effect on neighboring electropoters; More powerful required electrical installation Increased electricity consumption during start. |
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Copeland spiral compressor has one of the best indicators by degree oil deposits into the system - one of the most low values \u200b\u200b\u003d\u003e in many applied cases of oil separator and other complex components of the system lubricants are not required |
Oil departments in most piston compressors (except for models with ventilating valve in the crankcase, for example, for Copeland - model Rows Discus or S-series) above, and screws several times higher \u003d\u003e additionally be sure to be required expensive components of the oil refund system (and sometimes cooling), installation management system becomes more complicated, and its reliability is reduced |
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Opportunity to work in conditions intermittent (depleted) oil refund thanks teflon sliding bearings \u003d\u003e high working resource even in heavy operating conditions (for example, reduced viscosity due to high oil temperature or large quantities of dissolved refrigerant; intermittent (portion) refund oils in the compressor) |
Almost all other compressors in the world (except model Rows of Discus or S-series from Copeland), in which are applied sliding bearings, have a bronze or similar coating (babbita, etc.) in friction pairs \u003d\u003e improper lubricant conditions wear friction pairs \u003d\u003e fast failure compressor |
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High feed coefficient on during the whole service life due to free self-confidential seal between spirals - radial matching \u003d\u003e constant cooling capacity |
Most types of compressors coefficient feed reduced as exploitation compressor due to wear conjugated parts in cluster cavities \u003d\u003e reduced cooling capacity at the end regulatory life |
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Increased resistance to "wet go to the radial coordination |
Low resistance to "wet go" compressor types (including spiral models where there is no radial matching), in addition to screw compressors |
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High resistance to mechanical pollution due to radial coordination |
Mechanical particles enter the compression zone practically always leads to failure any types of compressors, including spiral models without radial coordination |
Comparison with other types of spiral compressors
| Spiral compressors Copeland. | Other spiral compressors |
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There is the most complete line spiral compressors, including low-temperature models up to minus 40 oC boiling: * Air conditioning (R22, R134A, R407C) Zr * Air conditioning (R410A) ZP * High-temperature thermal pumps ZH * Highly and medium temperature cooling / chillers ZB. * Middle temperature cooling ZS * Low-temperature cooling ZF * ultra-low temperature (cryogenic) cooling Zc. * Horizontal models: ZBH - high and medium temperature cooling ZSH - medium temperature cooling ZFH - low-temperature cooling * Models with stroke and stepless performance regulation |
Most of the firms producing spirals compressors, have in their arsenal only models for air conditioning (in the extreme case, for medieval cold), because low-temperature models are too complex and require radical change in the inner designs |
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There is an internal mechanical protection of spirals from overload: Medium and temperature models ZS and ZF - if the pressure ratio is exceeded discharge / suction 20: 1 highly and medium-temperature models Zr and ZB - with exceeding the pressure ratio discharge / suction 10: 1 thanks to the axial agreement |
Most manufacturers are mechanical protection of spirals themselves from overload no (there is no axial matching) \u003d\u003e possible destruction of spirals during overload |
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When starting the helix do not touch each other his side surfaces (Thanks to the axial agreement) \u003d\u003e Unloaded Start \u003d\u003e Increased motor and low energy consumption |
Most spiral compressors have construction with a rigid fixed trajectory movement of the rotating spiral (there is no axial matching) \u003d\u003e Start under load \u003d\u003e increased power consumption |
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Direct contact between the spirals in end direction without use end gaskets \u003d\u003e high resource and the possibility of working at high degrees of compression |
Many manufacturers apply end gaskets to ensure proper seals \u003d\u003e reduced service life and difficulties in working with large drops pressures (low-temperature modes) |
Copeland Digital Scroll ™ Spiral Compressors
Compressor design "Copland" Digital Scroll ™ is based on unique technology Coordination of the Copeland Compliance ™ Spiral Block. Performance management is achieved by dilution of spirals in the axial direction for a short period of time. This is a simple and reliable mechanical method for smooth performance control, precision temperature maintaining and improving the efficiency of the system.
Copeland Digital Scroll ™ Spiral Compressor is a solution that can be integrated into an existing system. This happens quickly and easily because no other components are required. To make the implementation process simpler, Dixell and Alco developed jointly with Copeland two controllers to control Copeland Digital Scroll ™ compressors.
Spiral compressor "Copland" Digital Scroll ™ offers the widest range of productivity control in industry and allows you to smoothly change performance from 10% to 100% without changing the operating range compared to the standard Copeland Scroll ™ compressor. As a result, the pressure of suction and temperature are supported very accurately, and the compressor cyclicity is minimized. This guarantees the optimal efficiency of the system and the long service life of the equipment and components.
The possibility of using Copeland Digital Scroll ™ spiral compressors at condensation temperature up to 10 ° C also guarantees best indicators Seasonal efficiency in the compressor market. The rate of refrigerant in systems with Copeland Digital Scroll ™ compressors is identical to standard compressors, even with low performance.
Copeland Digital Scroll ™ Spiral Compressor works at full speed all the time, never reducing the refund of the oil in the compressor. The Digital Scroll ™ compressor provides a similar high level of reliability, as well as systems with standard compressors. The compressor electric motor does not overheat and there are no resonant oscillations during operation, as often happens in systems with an inverter.
Highly efficient spiral compressors Copeland ZF EVI
Copeland Scroll TM offers the most efficient solution for low-temperature applications in supermarkets. Three years ago, starting to produce spiral compressors of the ZB series intended for refrigeration technologyoperating in the range of average boiling temperatures, Copeland began the release of a second generation of spiral compressors. Today, this generation has been replenished with a new series of highly efficient spiral compressors, which will undoubtedly have a significant impact on the subsequent development of refrigeration systems. New spiral ZF EVI compressor, specially designed and optimized for maximum use Advantages of fluid overcooling technology and steam injection is the key component for the design of highly efficient low-temperature central cold-base stations.
Spiral compressors ZF EVI are characterized by higher cooling values \u200b\u200band refrigeration coefficients (COP) compared to models available on the market, which provides additional benefits during operation and makes this compressor the most preferred solution for food storage systems. In this article describes the EVI spiral compressor concept. , its main characteristics and applied aspects of use in refrigeration systems. Couple injection. The refrigeration cycle with an EVI spiral compressor is similar to a two-stage cycle with intermediate cooling, but using a single compressor (see cris 1). This concept is much simpler and eliminates additional losses that exist in a conventional system with two compression steps. Principle of action of steps high pressure It is the selection of a part of the condensed fluid and its subsequent evaporation after the expansion valve in the heat exchanger-overcohelter (economizer) of the countercurrent type. Next, the superheated pairs enters through the intermediate ports of the injection in the cavity of the spiral block.
Additional overcooling increases the cooling capacity of the evaporator, lowering the enthalpy of the refrigerant at the entrance, with a constant mass consumption. The additional mass consumption required for injection depends on the location of the port and creates an additional load, which slightly increases the power consumption of the spiral compressor. Therefore, the construction of the injection port was optimized in such a way as to ensure maximum increase in performance with minimal compressor power consumption. It is well known that the efficiency of a two-stage compression cycle is higher than a single-stage (with equal volume performance).
The increase in the cooling capacity of the compressor is achieved due to the deeper hypothermation of fluid in the economizer with a minor increase in power consumption on the compression of a small portion of gas from the intermediate pressure to the discharge pressure. The steam-free cooling reduces the discharge temperature, ensuring the operation of the spiral compressor with a larger pressure ratio. Previously, the injection of the steam was traditionally applied only in large commercial screw and multistage centrifugal compressors (but not in small hermetic). Today Copeland presents a new compressor with a steam injection, which is part of the spiral family. It is specially designed for low-temperature applications and provides the level of efficiency compared with the Copeland Copeland Copeland Compressor efficiency, which in recent years has been recognized as the most effective in the world among compressors of all types.
Spiral compressor - a device for compressing gas (air or refrigerant), by reducing its volume in chambers formed by the surfaces of the spirals.
Spiral compressors are used in air conditioning systems, cooling, heating, in cars, cryogenic and refrigeration systems, as vacuum pumps.
There are several typical design of spiral compressors.
The most common option is using two spiral elementsinstalled with eccentricity. One of these elements is movable, the other is not.
The spiral compressor is shown in the figure.
In a sealed case, an electric motor is placed, which leads to rotation of the shaft. In the upper part of the case installed a fixed spiral. A moving spiral is installed on the shaft, which can move on the guides by making a complex movement relative to fixed spirals.
As a result of moving between the spirals, chambers (pockets) are formed, the volume of which, with further movement, decreases, and as a result, the gas located in these pockets is compressed.
The principle of operation of this compressor is shown in the video:
Also found Compressors with two moving spiralscommitted rotary traffic relative to different axes. As a result of rotation of the spiral elements, cameras are also formed, the volume of which is reduced during rotation.
To a greater extent, the compressor is different from the above options, in which the rigid element made in the form archimedean Spiral Affected by flexible elastic tube. According to the principle of operation, such a compressor is similar to the peristaltic pump. Such spiral compressors Usually filled with liquid lubricant to reduce wear of the flexible tube and heat removal. Such compressors are often called hose.
In the spiral compressors, the valve on suction is not needed, because The movable spiral itself cuts off the working chamber from the suction canal. A dynamic valve can be installed in the discharge line of the spiral compressor, which does not allow the reverse stream and, as a result, the rotation of the helix under action when the engine is turned off. It should be borne in mind that the dynamic valve creates additional resistance in the injection line.
Dynamic valves are installed in the injection line of medium and low-temperature Copeland compressors designed for refrigeration equipment.
Spiral compressor works more smoothly, and reliably than most other bulk machines. Unlike the pistons, the moving spiral can be perfectly balanced, which minimizes vibration.
The absence of a dead volume in spiral compressors causes increased bulk efficiency.
Spiral compressors usually have less ripple than with one piston, but more than a lot of piston machines.
Spiral compressors have less moving partsCompared to piston, which, theoretically, ensures their greater reliability.
Spiral compressors are usually very compact and do not require a spring suspension, due to smooth operation.
Spiral compressors are sensitive to pollution of the pumped gas, because Small particles can sow on the surface of the spiral, which will not allow to provide sufficient tightness of the working chamber.
The spiral compressor should rotate only in one direction.
For a long time, spiral compressors were produced without the possibility of adjusting performance. If necessary, reduce the feed was used frequency regulation Drive electric motor, or bypass of a part of the gas from the injection line into the suction line.
Currently adjustable spiral compressors Produced by Emerson. In these compressors, the distance between the axes of rotation of the spirals can be changed, if necessary, this distance can be selected in such a way that the camera will not form between the spiral elements, which means the compressor supply will be the wound 0. Alternating two different working conditions (idle and working stroke) using electronic Management, you can achieve the required performance.
The main advantages of spiral compressors are:
1. High energy efficiency; Their effective efficiency reaches 80-86%;
2. High reliability and durability, determined by the durability of bearings;
3.Good balance; slight change in torque on the compressor shaft; Small gas movement speeds in the car, all this ensures the course of the machine with low noise.
4. Suggestion - the number of revolutions of the compressor shaft from 1000 to 13000, and this range expands.
5. Activity of a dead volume, a small fraction of leakage, and, therefore, a higher indicator efficiency; The gas is absorbed by the compressor does not come into contact with the hot walls of the components of the compressor;
6. Processes of suction, compression and discharge "stretched" at the corner of the shaft rotation and therefore even with a high frequency of the gas velocity shaft.
7. Activity valves on suction, and often on the injection;
8. The spiral compressor, as well as screw, can work on a loop with "charging";
9. The spiral compressor, like all compressors of the volume principle of operation, can work on any refrigerant, on any gas and even with the injection of drip fluid.
Compared to piston compressors of the same power, a spiral compressor has the following advantages:
1. Higher efficiency - by 10-15%;
2. A higher feed coefficient - by 20-30%;
3. Smaller sizes - by 30-40%;
4. Smaller mass - at15-18%;
5. Noise level below 5-7 dBA;
6. There are no details that are often faced with piston rings, valves.
7. It can work with the injection of drip fluid, for example, in an oil-filled version, as well as screw;
8. Less details, less production cost.
The deficiencies of spiral compressors should be attributed as follows:
1. Spear machines require new spiral parts for machine building, for the manufacture of which is necessary milling machines CNC.
2. On the rolling spiral there is a complex system of forces: axial, centrifugal, tangential, requiring competent calculation and balancing, and, consequently, the rotor balancing.
3. If there is no discharge valve, the theoretical indicator diagram of the spiral compressor will be the same as at a screw compressor, with possible dissipation and gas reliefs, i.e. with additional losses.
A person about the existence of a spiral knows quite a long time, but it was technically able to use its properties only at the end of the 20th century. The first development of such a kind can be attributed by 1905, when the French engineer Leon Crook created the first prototype of the spiral compressor and acquired the appropriate patent. This technology could not obtain mass development, since there was no production base for its implementation. The first acting device had to wait until the second half of the 20th century, since it was necessary for its manufacture precision machine processingwhich became available precisely during this period. This explains the recent appearance of spirals in the market of high-tech equipment.
The idea of \u200b\u200bcreating spiral compressors In 1972, Nils Yang, director of Arthur D. Little. The company's management immediately began work on creating new models. They immediately became interested in manufacturers of refrigeration and petrochemical equipment, since they had long been necessary to develop a new design of the compressor, which had greater efficiency. Already when testing the prototype, its unique ability was noted to provide the maximum degree of compression, which favorably distinguished him from all others that existed at the time of refrigeration compressors. In addition, the new type had high performance features, such as low noise and increased degree of reliability.
In 1973, Arthur D. Little began developing a spiral compressor for the American corporation TGAN. Then the idea of \u200b\u200bthe study was supported by companies such as Copeland, Hitachi, Volkswagen1, which began to produce individual details and master technologies in general. Work on the creation of a prototype of the air spiral compressor was moved slowly. Thus, at the end of the 80s, Hitachi and Mitsui Seiki created an oil-hammering air compressor which was subsequently found only one of the modifications. In 1987, IWATA Compressor concluded an agreement on the production of a spiral compressor together with Arthur D. Little. But only in 1992 she managed to present the first air spiral compressor. Soon, two more modifications of 2.2 and 3.7 kW appeared behind him. The main advantages to the piston were low vibration and noise, as well as reliability and durability.
Interest in improving spiral compressors is now showing most of the leading manufacturers. At the moment, these have passed the test of time and began to gradually displace other types from the market. refrigerated aggregates. Taking the dominant position, they find more and more use in systems air conditioning. First of all, this is due to their high reliability, a large operational period and a smaller level of noise, which is explained by the fact that spiral compressors contain 40% less details than the piston.
The volume of production of spiral compressors in recent years is rapidly growing. They began to actively apply in the field of air conditioning, including in split and multiplit models, in chillers, ruffle and thermal pumps. They can be found in air-conditioning systems of apartments, large buildings, transport plants, in supermarket systems and compressor-capacitor units. Their borders of cooling capacity are constantly increasing and at the moment approaching 200 kW (multicompressor station).
Multifier use spiral compressors Explained by their multifunctionality and reliability. They are used:
Manufacturers, using the popularity of their products, conduct active advertising companies. At the same time, fans of piston screw compressors, in attempts to defend their positions, begin active anti-advertising companies in support of their products. That is why there is a need to disassemble the objective advantages and disadvantages of spiral compressors.
Spiral compressors are indispensable on the restructured objects of distribution refrigerators, vegetable and fructuras and cold storage facilities. Also, with a decentralized cooling system, successfully used to cool the restructured refrigerated camerasallowing to reduce westing system, length and quantity, and it makes it possible to support the environmental safety and reliability of refrigeration systems.
