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Patent Searching and Data


Title:
CONTROL VALVE FOR VARIABLE-CAPACITY COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2019/098804
Kind Code:
A1
Abstract:
The present invention relates to a control valve for a variable-capacity compressor and, specifically, to a device for: simultaneously increasing concentricity among parts and increasing driving power by applying, to the control valve for a variable-capacity compressor, a two-stage coil for accommodating a part of a plunger and driving the same; and more smoothly performing an operation by adding a sleeve made from a non-magnetic material. The present invention relates to the control valve, which is connected to a variable-capacity compressor having a crank chamber, a discharge chamber and a suction chamber and having a swash plate provided inside the crank chamber, so as to control the inclination angle of the swash plate through switching of a refrigerant flow path, the control valve comprising: a hollow body part (100) having a first port (101), a second port (102), and a third port (103), which respectively communicate with the crank chamber, the discharge chamber, and the suction chamber; a valve part (200) including a main valve (210) positioned so as to be movable along the longitudinal direction inside the body part (100), thereby enabling the opening degree of a flow path formed between the first port (101) and the second port (102) to be adjusted; a pressure-sensitive part (300) including a pressure-sensitive member (310), which can be extended and contracted according to the pressure change of the third port (103), so as to correct the position of the valve part (200); a driving part (400) including the two-stage coil (410), which comprises a stair-shaped large-diameter portion (411) and small-diameter portion (412) having different inner diameters and forms magnetic force corresponding to the amount of an electric current supplied, and a plunger (420) of which one end is connected to the valve part (200) and a portion of the other side is inserted into the large-diameter portion (411) of the two-stage coil (410) so as to be capable of advancing and retreating; and the sleeve (500), which is made from the non-magnetic material, and is interposed so as to maintain a state in which a gap is formed between the inner peripheral surface of the body part (100) and the outer peripheral surface of the plunger (420), such that the influence of the magnetic force is reduced, thereby reducing friction resistance, and thus the present invention can prevent, in advance, interference capable of being generated since the center thereof is offset, controls the valve at a high accuracy and, specifically, can maximize market competitiveness while increasing the reliability and marketability of a product.

Inventors:
PARK, Jang Sik (121-502, 270 Sinbanpo-ro,Seocho-gu, Seoul, 06545, KR)
KANG, Dong Soo (502-2403, 33 Banseokdong-ro,Yuseong-gu, Daejeon, 34069, KR)
HONG, Tae Ho (102-511, 42 Dongtanwoncheon-ro 1109beon-gil, Yeongtong-gu,Suwon-si, Gyeonggi-do, 16528, KR)
HWANG, Seong Hwan (123-1301, 22 Gyeongsu-daero 976 beon-gil, Jangan-gu,Suwon-si, Gyeonggi-do, 16295, KR)
GUK, Mu Sung (604, Pyeongtaek 5-ro 34beon-gilPyeongtaek-si, Gyeonggi-do, 17902, KR)
PARK, Ji Young (204, 608 Manse-ro, Yangseong-myeon,Anseong-si, Gyeonggi-do, 17502, KR)
KIM, Jun Tae (1202, 165 Simin-ro, Sujeong-gu,Seongnam-si, Gyeonggi-do, 13340, KR)
Application Number:
KR2018/014242
Publication Date:
May 23, 2019
Filing Date:
November 20, 2018
Export Citation:
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Assignee:
DONG IL MACHINERY CO.,LTD. (431, Deokbongseowon-ro Yangseong-myeon,Anseong-si, Gyeonggi-do, 17503, KR)
International Classes:
F04B27/14; F16K1/34; F16K31/06
Foreign References:
JP2002250456A2002-09-06
JP2007211728A2007-08-23
KR20120130570A2012-12-03
JP2009036182A2009-02-19
KR101370736B12014-03-10
Attorney, Agent or Firm:
MAENG, Seon-Ho (3rd floor, 218 Yuksam-ro,Gangnam-gu, Seoul, 06227, KR)
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