Source: http://www.google.com/patents/US7249938?dq=5636223
Timestamp: 2016-10-22 12:45:32
Document Index: 32297142

Matched Legal Cases: ['art 30', 'art 30', 'art 30', 'art 40', 'art 40', 'art 40', 'art 70', 'art 70', 'art 85', 'art 85', 'art 85', 'art 85', 'art 85']

Patent US7249938 - Linear compressor - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsDisclosed herein is a linear compressor. In the present invention, the configuration that a sealing protrusion is protruded in a sealing part of a cylinder toward an exhale cover leads line contact with the exhale cover and the sealing protrusion of the sealing part. Even though small power is applied...http://www.google.com/patents/US7249938?utm_source=gb-gplus-sharePatent US7249938 - Linear compressorAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7249938 B2Publication typeGrantApplication numberUS 11/165,381Publication dateJul 31, 2007Filing dateJun 24, 2005Priority dateSep 17, 2004Fee statusPaidAlso published asCN1749563A, CN100400867C, US20060060195Publication number11165381, 165381, US 7249938 B2, US 7249938B2, US-B2-7249938, US7249938 B2, US7249938B2InventorsKi Won Noh, Jong Tae HerOriginal AssigneeLg Electronics Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (8), Non-Patent Citations (2), Referenced by (8), Classifications (8), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetLinear compressor
US 7249938 B2Abstract
Disclosed herein is a linear compressor. In the present invention, the configuration that a sealing protrusion is protruded in a sealing part of a cylinder toward an exhale cover leads line contact with the exhale cover and the sealing protrusion of the sealing part. Even though small power is applied to the exhale cover, the exhale cover and the sealing protrusion are closely adhered to each other, thus effectively sealing the exhale cover and the cylinder. Furthermore, as power transmitted from the exhale cover to the cylinder becomes reduced, a transformation of the cylinder can be prevented, and a performance and reliability of the linear compressor can be enhanced.
wherein the frame is connected to the cylinder;
an exhale cover covering an opening of the cylinder and fastened to the frame; and
a sealing protrusion protruded either in the cylinder or in the exhale cover, for line contact with the cylinder and the exhale cover,
wherein a flange is radially protruded in the exhale cover, so as to be connected to the frame, and a sealing part is protruded in a circumference of the cylinder, so as to face the flange, and
wherein the sealing protrusion is protruded either in the flange or in the sealing part toward another one.
4. The linear compressor as set forth in claim 3, wherein the exhale cover includes an inner exhale cover provided with an exhale hole that discharges fluid drained from the cylinder, and an outer exhale cover positioned at a regular interval from an outer surface of the inner exhale cover.
a hermetic casing; a linear motor installed in the hermetic casing;
a frame set in the linear motor and provided with a cylinder;
a piston which linearly reciprocates in the cylinder, by the linear motor;
12. The linear compressor as set forth in claim 11, wherein the exhale cover includes an inner exhale cover provided with an exhale hole that discharges fluid drained from the cylinder, and an outer exhale cover positioned at a regular interval from an outer surface of the inner exhale cover.
The present invention relates to a linear compressor, more particularly, in which a sealing protrusion is formed in a cylinder for line contact with the cylinder and an exhale cover. With this configuration, the linear compressor provides a capability of improving its performance and reliability, by effectively sealing the cylinder and the exhale cover, and by preventing a transformation of the cylinder.
In a hermetic casing 2 of the conventional linear compressor, a frame 4 connected to the cylinder 3 and a back cover 6 positioned in a rear of the frame 4 and provided with an inlet 5 are equipped. The frame 4 and the back cover 6 are upheld in the hermetic casing 2 by a main damper 7 and a subsidiary damper 8, so as to absorb a shock (see FIG. 1).
The linear motor 10 is divided by a stationary part and a movable part. The stationary part includes an outer core 11, an inner core 12, and a coil 13 with a magnetic field. The movable part includes a magnet 14 that linearly reciprocates by magnetic force around the coil 13, and a magnet frame 15 which the magnet 14 is fastened to.
In a rear of the piston 16, a flange 17 is formed to be fixed to the magnet frame 15. A main spring 18 is disposed between the flange 17 and the frame 4, and a subsidiary spring 19 is disposed between the flange 17 and the back cover 6, so that the piston 16 is elastically suspended.
In a front of the piston 16, there is an inhale valve 22 for opening and closing the inhale port 21. Fastened to the piston 16 by a connection member, the inhale valve 22 gets elastically bended, depending on a pressure difference between the inside and the outside of the inhale port 21, thus opening and closing the inhale port 21.
The cylinder 3 is in a shape of a cylinder, which is open at both sides, the piston 16 is inserted in one end, and the exhale part 30 for discharging compressed fluid is placed in the other end. The piston 16 and the exhale part 30 make a compression chamber C.
The exhale part 30 includes an inner exhale cover 32 located in a front of the compression chamber C of the cylinder 3 and provided with an exhale hole 31, an outer exhale cover 33 positioned at a regular interval from an outer surface of the inner exhale cover 32, and an exhale valve 34 elastically suspended in the inner exhale cover 32 to open and close the compression chamber C of the cylinder 3 (see FIG. 2).
The inner exhale cover 32 is in a shape of a cap, so as to make an exhale space where fluid is discharged in the front of the compression chamber C of the cylinder 3. The outer exhale cover 33 is in a shape of the cap, so as to make a predetermined space, apart from the outer surface of the inner exhale cover 32 by predetermined distance.
Fluid entered in the hermetic casing 2 is inhaled into the compression chamber C of the cylinder through the inhale passage 20 in the piston 16, is compressed by the piston 16, allows the exhale valve 34 to be opened, and is discharged to the outside through the inner exhale cover 32 and the outer exhale cover 33.
The inner exhale cover 32 and the outer exhale cover 33 are fastened to the frame 4 by the bolt 38. When the bolt 38 is tightened, the inner exhale cover 32 gives pressure to the sealing part 40 of the cylinder 3, and then the main flange 36 is closely adhered to the sealing part 40.
If power transmitted from the inner exhale cover 42 to the cylinder 3 gets reduced, in order to protect a transformation of the cylinder 3, the main flange 36 is not closely adhered to the sealing part 40. Therefore, fluid may leak between the inner exhale cover 32 and the cylinder 3.
The foregoing and other aspects are achieved by providing the linear compressor, based on the present invention, which comprises a frame connected to the cylinder, the exhale cover fastened to the frame, which covers an opening of the cylinder, and a sealing protrusion protruded either in the cylinder or in the exhale cover, for the purpose of line contact with the cylinder and the exhale cover.
According to the present invention providing the linear compressor, the sealing protrusion is protruded in the sealing part of the cylinder toward the exhale cover, thereby leading line contact with the exhale cover and the sealing protrusion of the sealing part. In spite of small power, the exhale cover and the sealing protrusion are closely adhered to each other, thus effectively sealing the exhale cover and the cylinder. Furthermore, as power transmitted from the exhale cover to the cylinder becomes reduced, a transformation of the cylinder can be prevented, and a performance and reliability of the linear compressor can be enhanced.
As referring to FIGS. 3 to 5, the linear compressor, in accordance with the present invention comprises a hermetic casing 50, a linear motor 60 installed in the hermetic casing 50, a frame 52 set in the linear motor 60 and provided with the cylinder 51, a piston 53 set in the cylinder 51 to linearly reciprocate, by means of the linear motor 60, and the exhale part 70 positioned in a front of an opening of the cylinder 51 to discharge fluid compressed in the cylinder 51.
The linear motor 60 is divided by a stationary part and a movable part. The stationary part includes an outer core 61, an inner core 62, and a coil 63 with a magnetic field. The movable part includes a magnet 64 that linearly reciprocates by magnetic force around the coil 63, and a magnetic frame 65 which the magnet 64 is fastened to.
The piston 53 has a flange 58 in its rear, so as to be combined with the magnetic frame 65. As a main spring 66 is disposed between the flange 58 and the frame 52, and a subsidiary spring 67 is disposed between the flange 58 and the back cover 55, so that the piston 53 is elastically supported.
The exhale part 70 includes an exhale cover 71 covering the opening of the cylinder 51 and fastened to the frame 52, an exhale valve 72 elastically suspended in the exhale cover to open and close the opening of the cylinder 51, and a loop pipe 73 connected to the exhale cover 71 to discharge compressed fluid to the outside.
The exhale cover 71 includes an inner exhale cover 75 covering the opening of the cylinder 51 and provided with an exhale hole 74 to discharge fluid drained from the cylinder 51, and an outer exhale cover 76 positioned at a regular interval from an outer surface of the inner exhale cover 75.
The exhale hole 74 is respectively formed in a front and a circumference of the inner exhale cover 75. The exhale valve 72 is elastically held in the inner exhale cover 75 by an exhale spring 78 which is a conic coil spring to give the elasticity toward a direction that the exhale valve 72 closes the compression chamber of the cylinder 51.
The inner exhale cover 75 and the outer exhale cover 76 are in a shape of a cap. A main flange 81 is radially protruded in the inner exhale cover 75, so as to be combined with the frame 52. A subsidiary flange 82 is radially protruded in the outer exhale cover 76, so as to be combined with the main flange 81 and the frame 52 as well.
In order to prevent against a leakage of fluid through a slit between the cylinder 51 and the inner exhale cover 75, as the sealing part 85 is formed to confront the main flange 81, it is radially protruded along the circumference of the cylinder 51.
To be sealed by line contact with the cylinder 51 and the inner exhale cover 75, a sealing protrusion 86 is protruded either in the sealing part 85 or in the main flange 81. The case that the sealing protrusion 86 is formed in the sealing part 85 is explained as an example of the present invention.
When the inner exhale cover 75 and the outer exhale cover 76 are connected to the frame 52 by the bolt 83, the main flange 81 of the inner exhale cover 75 gives pressure to the sealing part 85 of the cylinder 51. A space between the inner exhale cover 75 and the cylinder 51 becomes sealed.
Due to line contact with the inner exhale cover 75 and the sealing protrusion 86, power transmitted from the main flange 81 of the inner exhale cover 75 to the sealing part 85 of the cylinder 51 is focused on the sealing protrusion 86. Even though small power is applied to the inner exhale cover 75, the inner exhale cover 75 and the sealing protrusion 86 are effectively adhered to each other, and are sealed.
As apparent from the above description, the linear compressor of the present invention provides the sealing protrusion protruded in the sealing part of the cylinder toward the exhale cover, resulting in line contact with the exhale cover and the sealing protrusion of the sealing part. With small power, the exhale cover and the sealing protrusion are closely adhered to each other, thus effectively sealing the exhale cover and the cylinder. Furthermore, as power transmitted from the exhale cover to the cylinder becomes reduced, a transformation of the cylinder can be prevented, and a performance and reliability of the linear compressor can be enhanced.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6398523 *May 22, 2000Jun 4, 2002Lg Electronics Inc.Linear compressorUS6676388 *Jan 4, 2002Jan 13, 2004Lg Electronics Inc.Gas compression apparatus for reciprocating compressorUS6835052 *Dec 18, 2002Dec 28, 2004Lg Electronics Inc.Suction valve assembly of reciprocating compressorUS6875001 *May 24, 2001Apr 5, 2005Lg Electronics Inc.Reciprocating compressorUS6913450 *Jun 26, 2001Jul 5, 2005Lg Electronics, Inc.Suction valve coupling structure for reciprocating compressorUS6960067 *Mar 24, 2001Nov 1, 2005Lg Electronics Inc.Reciprocating compressor having an inner core with a scratch resistant intermediate memberUS7025575 *Jul 19, 2004Apr 11, 2006Lg Electronics Inc.Reciprocating compressor with vibration reducing plateUS7028601 *Oct 31, 2002Apr 18, 2006Lg Electronics Inc.Abrasion preventive structure of reciprocating compressor* Cited by examinerNon-Patent CitationsReference1U.S. Appl. No. 11/165,189 to Jung et al., which was filed on Jun. 24, 2005.2U.S. Appl. No. 11/191,902 to Kim, which was filed on Jul. 29, 2005.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS9322401 *Feb 10, 2014Apr 26, 2016General Electric CompanyLinear compressorUS9429150 *Feb 10, 2014Aug 30, 2016Haier US Appliances Solutions, Inc.Linear compressorUS20150226194 *Feb 10, 2014Aug 13, 2015General Electric CompanyLinear compressorUS20150226196 *Feb 10, 2014Aug 13, 2015General Electric CompanyLinear compressorUS20150226197 *Feb 10, 2014Aug 13, 2015General Electric CompanyLinear compressorUS20150226198 *Feb 10, 2014Aug 13, 2015General Electric CompanyLinear compressorUS20150226199 *Feb 10, 2014Aug 13, 2015General Electric CompanyLinear compressorUS20150226203 *Feb 10, 2014Aug 13, 2015General Electric CompanyLinear compressor* Cited by examinerClassifications U.S. Classification417/417, 92/171.1, 128/204.18, 92/169.1International ClassificationF04B35/04, F04B17/04Cooperative ClassificationF04B35/045European ClassificationF04B35/04SLegal EventsDateCodeEventDescriptionAug 17, 2005ASAssignmentOwner name: LG ELECTRONICS INC., KOREA, REPUBLIC OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NOH, KI WON;HER, JONG TAE;REEL/FRAME:016901/0241Effective date: 20050725Dec 3, 2010FPAYFee paymentYear of fee payment: 4Jan 22, 2015FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services