| Dual horizontal scroll machine -> Monitor Keywords |
|
|
 
Dual horizontal scroll machineRelated Patent Categories: Pumps, Motor Driven, Electric Or Magnetic Motor, Rotary Expansible Chamber Pump, Helical Pumping Member Having Planetary Movement (e.g., Scroll)Dual horizontal scroll machine description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060204378, Dual horizontal scroll machine. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001] The present invention relates to plural compressors disposed within a single shell where two compressors, located at opposite ends of a motor, are both driven by the motor. More particularly, the present invention is directed to a system incorporated into both compressors that reduces objectionable noise generated during operation of the compressors. BACKGROUND AND SUMMARY OF THE INVENTION [0002] Due to energy costs and conservation, there is a demand for refrigerant motor-compressor systems which have an output which can be varied in accordance with demand. To satisfy this demand, a large number of systems have been developed. One such system involves the unloading of one or more cylinders in a multi-cylinder compressor or the varying of re-expansion volume for the purpose of varying the output of the compressor system. These variable capacity systems tend to be relatively complex and the efficiency of the compressor in an unloaded state is not optimum. Variable speed compressors have also been used, but these variable speed compressors require expensive controls. The efficiency of the speed control, as well as the efficiency of the motor-compressor, present problems at least when the system is operating in a reduced capacity condition. [0003] Compressor systems have also been developed which, in place of a single compressor large enough to carry the maximum load demand, include a plurality of smaller motor compressors having a combined output equal to the required maximum load demand. These multi-compressor systems include means for controlling the total system in such a manner as to selectively activate and deactivate each of the plurality of motor compressors independently when the load demand varies so that the compressor system output meets the required load demand. These multi-compressor systems have good efficiency but they require complex piping and plumbing systems, including means for dealing with lubricating oil management in order to ensure that all of the lubricating oil remains equally distributed between each of the individual compressors. [0004] Additional designs for the multi-compressor systems have included the incorporation of a plurality of standard motor compressor units in a common single compressor shell. The common shell maximizes the compactness of the system and it provides a common oil sump for equal oil distribution, a common suction gas inlet and a common discharge gas outlet. These single shell multi-compressor systems have proven to be acceptable in the market place, but they tend to be relatively large and the means for controlling the total system is still somewhat complex. Still other additional designs for the multi-compressor systems have included the incorporation of a pair of compressors disposed at opposite sides of a common drive shaft. These designs have reduced size and complexity and to further increase their flexibility, both compressors are provided with capacity control systems. One issue that arises when the multi-compressor systems incorporate capacity control systems is the noise generated by one or both of the compressors when it is being operated in a reduced capacity or a capacity modulated mode. [0005] The continued development of multi-compressor systems has been directed towards the reduction of noise generated by the compressors when they operate in a reduced capacity or a capacity modulated mode. [0006] The present invention provides the art with a multi-compressor compression system where a single compressor is located at opposing sides of a single drive shaft. A single motor rotor is press fit to the central portion of the drive shaft and the single motor rotor is disposed within a single motor stator. Thus, both compressors are powered by the same rotor and stator of a single motor. The control of the output of the multi-compressor system is accomplished by a pulsed width modulation (PWM) capacity control system incorporated into one or both of the opposing compressors. When incorporating the PWM capacity control system into one of the compressors, the capacity can be varied from 50% and 100%. When incorporating the PWM capacity control system into both compressors, the capacity can be varied from 0% to 100%. The capacity of one or both of the compressors can be increased to approximately 120% of capacity using a vapor injection system to further increase the range of the dual compressor system if desired. More than one of these dual-compressor/single motor systems can be incorporated into a single shell if desired. [0007] In addition to the PWM capacity control system, the compressors are equipped with a sleeve-guide spring and an anti-thrust ring to reduce any noise that may occur during the capacity modulation of the compressor. The sleeve-guide spring urges the fixed scroll against the head of the sleeve-guide bolt while the anti-thrust ring restricts any wobble motion of the orbiting scroll member which may occur. Both of these components work to reduce noise during capacity modulation of the compressor. [0008] Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS [0009] The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein: [0010] FIG. 1 is a perspective view of the motor compression system in accordance with the present invention; [0011] FIG. 2 is a vertical cross-sectional view through the motor compressor systems illustrated in FIG. 1; [0012] FIG. 3 is an enlarged sectional view of the piston assemblies shown in FIG. 1; [0013] FIG. 4 is a top view of the piston assembly shown in FIG. 3; [0014] FIG. 5 is an end section view of the modulated compressors shown in FIG. 1 illustrating the vapor injection system; [0015] FIG. 6 is a side view of the non-orbiting scroll member of the modulated compressors shown in FIG. 1 illustrating the vapor injection system; [0016] FIG. 7 is a cross-section top view of the non-orbiting scroll of the modulated compressors shown in FIG. 1 illustrating the vapor injection system; [0017] FIG. 8 is an enlarged cross-sectional view of the vapor injection fittings shown in FIG. 1; [0018] FIG. 9 is an end view of the fitting shown in FIG. 8; [0019] FIG. 10 is a schematic diagram of a refrigerant system utilizing the capacity control system and the vapor injection system in accordance with the present invention; [0020] FIG. 11 is an exploded perspective view of a shell assembly in accordance with another embodiment of the present invention; [0021] FIG. 12 is a sectional view of the end cap illustrated in FIG. 11; and Continue reading about Dual horizontal scroll machine... Full patent description for Dual horizontal scroll machine Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Dual horizontal scroll machine patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Dual horizontal scroll machine or other areas of interest. ### Previous Patent Application: Internal intermediate pressure multistage compression type rotary compressor, manufacturing method thereof and displacement ratio setting method Next Patent Application: Dual volume-ratio scroll machine Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Dual horizontal scroll machine patent info. IP-related news and info Results in 0.1451 seconds Other interesting Feshpatents.com categories: Qualcomm , Schering-Plough , Schlumberger , Seagate , Siemens , Texas Instruments , 174 |
 * Protect your Inventions * US Patent Office filing 
PATENT INFO |
|
