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CompressorRelated Patent Categories: Pumps, Successive StagesCompressor description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060110263, Compressor. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims the benefit of Korean Patent Application No. 2004-95741, filed on Nov. 22, 2004 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a compressor, and, more particularly, to a compressor which can reduce operational noise through the use of a low-speed motor without a deterioration of compressive capability thereof. [0004] 2. Description of the Related Art [0005] In general, a refrigerating cycle, employed in a refrigerator, air conditioner, etc., comprises a compressor that suctions and compresses a low-pressure refrigerant and discharges the refrigerant in a high-pressure state, a condenser that condenses the high-pressure refrigerant coming from the compressor, an expander that expands the condensed refrigerant coming from the condenser, and an evaporator that evaporates the expanded refrigerant coming from the expander to transfer heat from the refrigerant to surrounding air. Here, the compressor, condenser, expander and evaporator form a closed circuit by way of refrigerant pipes. [0006] The refrigerant circulating in the refrigerating cycle, therefore, emits heat to the surroundings while as it is condensed in the condenser, and absorbs heat of the surroundings as it is evaporated in the evaporator. Thus, the evaporator performs a cooling operation. [0007] Considering the configuration of the compressor, it comprises a compressing unit to compress the refrigerant, and a motor to provide power required to compress the refrigerant, both the compressing unit and the motor being mounted in a hermetic casing of the compressor. The hermetic casing is provided with a suction pipe to guide the refrigerant, coming from the evaporator, into the hermetic casing and with a discharge pipe to guide the refrigerant, compressed by the compressing unit, to the condenser. [0008] With such a configuration, the refrigerant, introduced into the hermetic casing from the evaporator by way of the suction pipe, is compressed by passing through the compressing unit based on the driving of the motor, and successively, the compressed refrigerant is discharged to the condenser by way of the discharge pipe. [0009] As the motor for use in the compressor of the refrigerating cycle, a 2-pole motor having a commercial rotating rate of 3000 to 3600 rpm is conventionally used in consideration of the capacity of the refrigerating cycle. [0010] However, in the case of the conventional compressor using the high-speed 2-pole motor, there is a problem that operational noise of the compressor excessively increases due to vibration generated during the high-speed rotation of the motor. [0011] As a solution, although it is considerable to provide the compressor with a low-speed motor having two or more poles, such as a 4-pole motor, etc., having a commercial rotating rate of 1500 to 1800 rpm in order to reduce the operational noise of the compressor, this is also problematic because such a reduced rotating rate of the motor tends to deteriorate the compressive capability of the compressor, making it impossible to perform a smooth refrigerant compressing operation. SUMMARY OF THE INVENTION [0012] Accordingly, it is an aspect of the present invention to provide a compressor capable of reducing operational noise through the use of a low-speed motor without a deterioration of compressive capability thereof. [0013] Additional aspects and/or advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention. [0014] The foregoing and/or other aspects may be achieved by providing a compressor comprising: a hermetic casing, a compressing unit having a compression chamber to compress a refrigerant, a drive unit taking the form of a low-speed motor having four or more poles and adapted to provide power required to compress the refrigerant, and a charger adapted to increase the amount of the refrigerant to be introduced into the compression chamber. [0015] The charger may be driven upon receiving a driving force of the drive unit to compress the refrigerant inside the hermetic casing and to deliver the compressed refrigerant to the compression chamber. [0016] The drive unit may include a stator affixed in the hermetic casing, a rotor located in the stator, and a rotary shaft press fitted in the rotor, the compressing unit may include a cylinder defining the compression chamber, a piston reciprocately installed in the compression chamber, an eccentric shaft unit formed at one end of the rotary shaft, and a connecting rod to connect the eccentric shaft unit to the piston, and the charger may include an auxiliary cylinder defining a charger chamber, an auxiliary piston reciprocately installed in the charger chamber, an auxiliary connecting rod to connect the auxiliary piston to the eccentric shaft unit, a suction channel to communicate the interior of the hermetic casing with the charger chamber, and a discharge channel to communicate the charger chamber with the compression chamber. [0017] The auxiliary piston may be configured to reach a top dead point thereof before the piston of the compressing unit reaches a top dead point thereof. [0018] The auxiliary piston may reach a bottom dead point thereof after the piston reaches the top dead point thereof, and may reach the top dead point thereof after the piston reaches a bottom dead point thereof. [0019] The suction channel and the discharge channel may be provided, respectively, with a suction valve and a discharge valve, opening and closing operations of the suction and discharge valves being exactly opposite to each other. [0020] The drive unit may be a 4-pole motor. [0021] An oil sump may be defined in a lower region of the hermetic casing, and the drive unit may include a stator affixed in the hermetic casing, a rotor located in the stator, and a rotary shaft press fitted in the rotor, the rotary shaft having an oil passage to supply oil to frictional regions of the compressing unit and the rotary shaft, and an oil pickup member may be provided at a lower end of the rotary shaft to communicate an oil sump with the oil passage, and a plate-shaped vane may be press fitted in the oil pickup member, the vane having a pair of lower bent portions formed at opposite lower corners thereof to be bent in a rotating direction of the rotary shaft and a pair of upper bent portions formed at opposite upper corners thereof to be bent in an opposite direction of the rotating direction. Continue reading about Compressor... Full patent description for Compressor Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Compressor 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 Compressor or other areas of interest. ### Previous Patent Application: Device of micro loop thermosyphon for ferrofluid power generator Next Patent Application: Compressor Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Compressor patent info. IP-related news and info Results in 0.42053 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf 174 |
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