Abstract:
The present invention provides a high efficiency scroll compressor with spiral compressor blades of unequal thickness, using unfolding logarithmic spirals configured to satisfy a gear engaging condition, that is, spirals of unequal thickness serve as compressor blades, thereby providing high gas compression ratio, and high compression efficiency, to achieve the objectives of energy conservation and carbon reduction.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    (a) Field of the Invention 
         [0002]    The present invention provides a high efficiency scroll compressor with spiral compressor blades of unequal thickness, which is used in cold air (storage) compressors to increase efficiency thereof, and thereby achieve the objective of energy conservation and carbon reduction. 
         [0003]    (b) Description of the Prior Art 
         [0004]    Recent advances in technology have enabled the manufacture of many excellent products, one excellent invention being the air conditioner. And temperature build-up caused by global climatic shift of recent years is necessitating the installation of air conditioners in every home. However, the excessive use of air conditioners not only consumes power, but is also, because the liquid coolant used by air conditioners results in damage to the environment, one if the reasons for global temperature build-up. Presently, there is not one country in the world that is not implementing means to protect the environment, save energy and reduce carbon emissions. Hence, increasing compressor performance of cold air (storage) compressors is without doubt a feasible plan for improvement thereof. 
         [0005]    Scroll compressors have been on the market for nearly 30 years, and have become the main force product for small and medium sized air conditioners. The scroll compressor comprises a compression chamber primarily formed from a symmetrical assembly of two scrolls consisting of a moving and a stationary involute scroll. Operating strokes are as follows: 1. intake stroke; 2. low compression stroke; 3. medium compression stroke; 4. high pressure discharge stroke (refer to  FIG. 1 ); with the radial forces produced by the compressed gas mutually canceling. Compared to other types of compressors, the scroll compressor provides multiple advantages, including large volume, high efficiency, high reliability, low noise, few components, simple operating principle, and low cost; and is generally acknowledged by the industry as a product provided with the most development potential. Although the scroll compressor is provided with the aforementioned many advantages, it would be welcome news for the industry if compressor performance could be increased. 
         [0006]    However, how to design a high performance scroll compressor that brings into full play its superior capabilities is presently an active research direction for manufacturers. As for the current situation, one after another large international manufacturers of compressors are applying for patents to protect self-interests, thereby restricting subsequent manufacturers from entering the market, and thus imposing restraints on innovation. Hence, how can subsequent manufacturers survive under such stringent conditions? Only by overcoming traditional innovative thinking can new inventive ideas be initiated. In essence, up to the present time the inventor of the present invention has not seen any related reports, articles or the appearance of any products on how scroll compressors can be made to produce a higher compression ratio to increase the compression effectiveness thereof. In view of this, the inventor of the present invention being beset by the aforementioned deficiency, proposes a new invention to resolve and surmount existent technical difficulties to Improve functionality of scroll compressors of the prior art. 
         [0007]    In order to increase performance, the inventor of the present invention analyzed involutes as base curves to derive the development of spirals of unequal thickness to serve as scrolls, and investigated into the characteristics of scroll compressors, as well as carrying out an exploratory comparison of a logarithmic spiral  100  and an Archimedes&#39; spiral  200  with a base circle involute  300  (refer to  FIG. 2 ). 
         [0008]    The aforementioned research and experimentation, after untold hardships, and carrying out innumerable experiments with countless failures and repeated modifications, finally came to fruition in the development of a solution to the foregoing problems and shortcomings, and primarily uses unfolding logarithmic spiral scroll compressor blades, that is, spirals of unequal thickness are used to serve as scroll compressor blades. Compression efficiency can be increased by merely replacing the blades of a compressor, thereby resolving long standing insurmountable problems, and achieving the objectives of energy conservation and carbon reduction. 
       SUMMARY OF THE INVENTION 
       [0009]    The present invention provides a high efficiency scroll compressor with spiral compressor blades of unequal thickness, which is used in cold air (storage) compressors to increase efficiency, achieving energy conservation and carbon reduction. 
         [0010]    The high efficiency scroll compressor with spiral compressor blades of unequal thickness of the present invention uses unfolding logarithmic spirals, which are configured to satisfy a gear engaging condition, that is, spirals of unequal thickness are used to serve as compressor blades. And the objective of increasing compression efficiency is achieved by merely replacing the blades of a compressor. 
         [0011]    To enable a further understanding of said objectives and the technological methods of the invention herein, a brief description of the drawings is provided below followed by a detailed description of the preferred embodiments. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0012]      FIG. 1  is a drawing depicting compression strokes of a scroll compressor of the prior art. 
           [0013]      FIG. 2  is a drawing depicting an exploratory comparison of line forms of an Archimedes line, a logarithmic line and a base circle line. 
           [0014]      FIG. 3  is a structural view depicting a compressor of the present invention. 
           [0015]      FIG. 4  is a schematic view depicting logarithmic spiral blades of the present invention. 
           [0016]      FIG. 5  is a structural view depicting the logarithmic spiral blades of the present invention. 
           [0017]      FIG. 6  is a structural view depicting the involute interior and logarithmic spiral exterior of the blades of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0018]    Referring first to all the drawings, the present invention provides a high efficiency scroll compressor with spiral compressor blades of unequal thickness, which is used in cold air (storage) compressors to achieve the objective of increasing efficiency thereof. Implementation of the present invention is described hereinafter: 
         [0019]    The high efficiency scroll compressor with spiral compressor blades of unequal thickness of the present invention (see  FIGS. 3 and 4 ) comprises a scroll compressor main body  1  provided with a bottom cover  2  and a base  3  at a lower end thereof, an encircling outer casing  4  forming a holding space, an eccentric shaft  5  is fitted close to the center of the interior of the holding space of the outer casing  4  and is configured perpendicularly between the upper and lower ends thereof, a motor rotor  6  and a motor stator  7  are formed on the periphery of the eccentric shaft  5 , a framework  8  is mounted on another end of the eccentric shaft  5 , an Oldham ring  9  fitted to the framework  8  is an anti-autorotation mechanism, a winding scroll  10  is coupled to the end of the eccentric shaft  5 , and a fixed scroll  11  is retained within the winding scroll  10 . An upper cover  12  is formed on an upper end of the fixed scroll  11  to enable covering thereof; moreover, the upper cover  12  is provided with an outlet pipe  13 . Furthermore, the outer casing  4  is provided with an inlet tube  14  at another appropriate place thereof. In addition, the outer casing  4  is fitted with a power supply connector  15  at an appropriate place thereof to enable connection to a power source. The above components make up a complete compressor, and apart from the aforementioned fixed scroll  11  and the winding scroll  10 , all the other components belong to the prior art. 
         [0020]    In which, the fixed scroll  11  and the winding scroll  10  form unfolding base circle scrolls around a base circle center. The length of the scroll ρ=a·θ b ; a is a fixed constant, a&gt;0, and b is an exponent. When b&lt;1, then the separation distance gradually decreases; when b=1, then a standard involute unfolds, and when b&gt;1, then the separation distance gradually opens up. 
         [0021]    The logarithmic equation is: 
         [0000]        x=a·θ   b ·cos θ
 
         [0000]        y=a·θ   b ·sin θ
 
         [0022]    Because the fixed scroll  11  and the winding scroll  10  are assembled as a set, and a 180° phase difference is formed between the two scrolls, thus, a second scroll line is: 
         [0000]        x=−a·θ   b ·cos θ
 
         [0000]        y=−a·θ   b ·sin θ
 
         [0023]    The geometric design of both the aforementioned fixed scroll  11  and the winding scroll  10  is based on an unfolding logarithmic spiral scroll blade, that is, they form compressor blades of unequal thickness (see  FIGS. 4 and 5 ), also called logarithmic spiral blades  16 . In other words, the smallest blade thickness is at the internal center, and gets thicker as the logarithmic spiral scroll blade unfolds (see  FIG. 5 ). Moreover, there is a space between adjacent blades, and the space still exists when the fixed scroll  11  engages with the winding scroll  10 , this being the space used to contain compression liquid, and is also the space used for compression work. During operation, compression is the same as that for traditional involute scrolls, that is, the compression liquid is compressed starting from the periphery towards the internal center of the scroll, thereby achieving a high compression ratio output. Experiments have shown that the present invention is able to increase compression efficiency by approximately 14%, thereby far exceeding performance of traditional involute scroll compressors. Hence, the present invention surpasses traditional involute scroll compressors with its superior compression efficiency and complete innovative design. Through conception, experimentation, and configuration of the components, the present invention is provided with multiple advantages, including being elaborate, saving space, easy assembly, saving on materials, durability, and low cost. Furthermore, merely replacing the compressor blades enables increasing compression efficiency, thereby achieving the objectives of energy conservation and carbon reduction. Hence, the present invention provides high economic benefits and is of industrial development value. 
         [0024]    In addition, because the geometric design of both the fixed scroll  11  and the winding scroll  10  of the present invention is based on an unfolding logarithmic spiral scroll blade, that is, they form compressor blades of unequal thickness, also called logarithmic spiral blades  16 , thus, the internal blade is the thinnest portion, which gradually becomes thicker towards the external part of the blade. Such a design is generally applicable; however, if the strength of the internal structure is inadequate, then another configuration can be incorporated, whereby the thickness of the internal blades is increased to improve the strength of the scroll blades. Such a configurational change involves applying involute blades of increased thickness, that is, involute linear blades  17  are on the inside, while logarithmic spiral blades are on the outside, both constituting applicable blades (see  FIG. 6 ), thereby resolving the problems associated with the weakest portions of the blades, and completely bringing into full play the advantages of the present invention. 
         [0025]    In conclusion, the present invention is an innovative design that uses technological ideas of physical laws to completely overcome traditional thinking and provide a new product provided with originality, advancement, and industrial application, thus complying with the essential elements as required for a new patent application. Accordingly, a new patent application is proposed herein. 
         [0026]    It is of course to be understood that the embodiments described herein are merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.