WO2019098804A1 - Control valve for variable-capacity compressor - Google Patents

Control valve for variable-capacity compressor Download PDF

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Publication number
WO2019098804A1
WO2019098804A1 PCT/KR2018/014242 KR2018014242W WO2019098804A1 WO 2019098804 A1 WO2019098804 A1 WO 2019098804A1 KR 2018014242 W KR2018014242 W KR 2018014242W WO 2019098804 A1 WO2019098804 A1 WO 2019098804A1
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WO
WIPO (PCT)
Prior art keywords
port
valve
plunger
capacity compressor
control valve
Prior art date
Application number
PCT/KR2018/014242
Other languages
French (fr)
Korean (ko)
Inventor
박장식
강동수
홍태호
황성환
국무성
박지영
김준태
Original Assignee
동일기계공업 주식회사
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Application filed by 동일기계공업 주식회사 filed Critical 동일기계공업 주식회사
Publication of WO2019098804A1 publication Critical patent/WO2019098804A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14—Control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves

Definitions

  • the present invention relates to a control valve for a variable capacity compressor, and particularly to a control valve for a variable capacity compressor, in which a two-stage coil for accommodating and driving a part of a plunger is applied to increase concentricity between parts and increase driving force, So as to prevent the interference which may occur due to the turning of the center and to perform the valve control with high accuracy and to maximize the market competitiveness while increasing the reliability and merchability of the product It's about what you can do.
  • a compressor for a refrigerant applied to a vehicle air conditioner is driven by receiving the rotational force of the engine, the driving of the compressor depends on the rotational speed of the engine, that is, the rotational speed per minute, The rotation speed is greatly influenced.
  • the cooling control is not free, and the variable capacity compressor which performs the proper cooling by varying the discharge capacity of the refrigerant irrespective of the revolution speed per minute of the engine is widely It has been applied.
  • a swash plate is provided on a crankshaft that is rotated by receiving the rotational force of the engine, and the variable displacement compressor varies the discharge capacity of the refrigerant by appropriately adjusting the inclination angle of the swash plate.
  • a control valve is provided in the variable displacement compressor.
  • One of the conventional control valves for the variable displacement compressor is disclosed in Korean Patent Registration No. 10-933830.
  • valve body for controlling the opening and closing of the valve is provided on the opposite side of the plunger, while the plunger driven by the coil is located in the coil, the length from the plunger to the valve body is long, It is difficult to accurately maintain the concentricity and coaxiality, and vibration and noise are frequently generated as well as interference and malfunction between components.
  • the plunger since the plunger is located inside the coil, it is necessary to design the outer diameter of the plunger to be smaller than the inner diameter of the coil, so that it is difficult to obtain a high driving force at a desired level.
  • the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a control valve for a variable capacity compressor, in which a part of a plunger is accommodated and a two- The valve control can be performed with high accuracy by increasing the driving force.
  • the non-magnetic material sleeve is added to the sliding portion to reduce the influence by the magnetic force and reduce the sliding resistance.
  • the present invention provides a control valve for a variable displacement compressor that maximizes market competitiveness while increasing reliability and merchantability of the product.
  • the control valve is connected to a variable capacity compressor having a crank chamber, a discharge chamber, and a suction chamber and having a swash plate in the crank chamber, and controls the inclination angle of the swash plate through the passage switching of the refrigerant.
  • a hollow body portion having a first port, a second port, and a third port communicating with the crank chamber, the discharge chamber, and the suction chamber, respectively; And a main valve positioned to be movable along the longitudinal direction in the body portion and capable of adjusting an opening degree of a flow path formed between the first port and the second port;
  • a pressure sensitive part including a pressure sensitive member that is expandable and contractible in accordance with a pressure change of the third port to correct a position of the valve part;
  • Stage coil having a large-diameter portion and a small-diameter portion with different inner diameters and forming a magnetic force corresponding to the amount of supplied current, and a two-stage coil having one end connected to the valve portion and the other portion connected to the large-
  • a driving unit including a plunger that is inserted and retractable; And a sleeve of a non-magnetic material interposed between the inner circumferential surface of the body portion and the outer circumferential surface of the plunger so as to reduce
  • the body portion may include a main body having the first port and the second port formed therein, and a yoke having the third port and made of a paramagnetic material;
  • the sleeve may be interposed between the inner circumferential surface of the yoke and the outer circumferential surface of the plunger.
  • the pressure responsive portion includes a bellows, which is a pressure sensitive member having an elastic body therein, and is located in the plunger.
  • a bellows which is a pressure sensitive member having an elastic body therein, and is located in the plunger.
  • One side of the bellows is fixed to a core located inside the two-stage coil, It may be preferable to selectively contact the valve portion according to the position of the valve body.
  • the sleeve is supported on the core and fixed in position.
  • valve portion may further include a bypass passage for communicating the first port and the third port, so that the gap between the valve portion and the valve seat may be changed while the valve portion is advanced or retracted, thereby performing a variable orifice function .
  • the present invention can prevent the interference that may occur due to the turning of the center by increasing the concentricity and the coaxiality between the components by applying a two-stage coil for receiving and driving a part of the plunger in the control valve for the variable capacity compressor, By increasing the driving force, the valve control is performed with high accuracy. Particularly, by adding the non-magnetic material sleeve to the sliding portion, the influence by the magnetic force is reduced and the sliding resistance is reduced. And to maximize market competitiveness while increasing commerciality.
  • FIG. 1 is a perspective view showing a control valve for a variable capacity compressor according to the present invention
  • FIG. 2 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention
  • FIG. 3 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention
  • FIG. 4 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention.
  • FIG. 5 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention.
  • FIG. 6 is a sectional view showing a control valve for a variable capacity compressor according to the present invention.
  • FIG. 7 is an enlarged view of a portion A of FIG. 6 showing a case where power is not applied to a driving portion in a control valve for a variable capacity compressor according to the present invention
  • FIG. 8 is an enlarged view of a portion A in FIG. 6 showing a case where a current amount is applied to a driving portion in a control valve for a variable capacity compressor according to the present invention
  • FIG. 9 is an enlarged view of a portion A of FIG. 6 showing a case where a current amount is appropriately adjusted and applied to a drive portion in a control valve for a variable capacity compressor according to the present invention
  • Fig. 10 is an enlarged view of a portion B in Fig. 6; Fig.
  • body part 101 first port
  • main body 120 main body 120: yoke
  • valve seat 131 through hole
  • valve part 210 main valve
  • valve shaft 221 bypass passage
  • first support member 313 second support member
  • sealing 410 two-stage coil
  • FIG. 1 is a perspective view showing a control valve for a variable capacity compressor according to the present invention
  • FIG. 2 is an exploded perspective view of a part of a body portion of a control valve for a variable capacity compressor according to the present invention
  • Fig. 2 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention.
  • FIG. 4 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention in which a valve portion is disassembled;
  • FIG. 5 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention, 6 is a sectional view showing a control valve for a variable capacity compressor according to the present invention.
  • FIG. 7 is an enlarged view of a portion A of FIG. 6 showing the case where power is not applied to the driving portion in the control valve for the variable capacity compressor according to the present invention.
  • FIG. FIG. 9 is an enlarged view of a portion A in FIG. 6 showing a case where a current amount is applied to a driving portion of the valve in FIG. 6;
  • FIG. 9 is a cross- Fig. 6 is an enlarged view of a portion A in Fig.
  • FIG. 10 is an enlarged view of the portion B in FIG.
  • the control valve for a variable capacity compressor according to the present invention can prevent interference that may occur due to the center turning by increasing the concentricity and coaxiality between parts by applying a two stage coil 410 which receives and drives a part of the plunger,
  • the sleeve 500 of the non-magnetic material can be added to the sliding portion in particular to reduce the influence by the magnetic force and reduce the sliding resistance,
  • the basic feature of the technology is that it maximizes market competitiveness while increasing the reliability and merchability of the product.
  • a control valve for a variable capacity compressor is connected to a variable displacement compressor provided with a crank chamber, a discharge chamber, and a suction chamber, and having a swash plate in the crank chamber, 1.
  • a control valve for controlling an inclination angle of a swash plate by switching a flow path comprising: A hollow body portion 100 in which a first port 101, a second port 102, and a third port 103 communicating with the crank chamber, the discharge chamber, and the suction chamber are formed; And a main valve (210) positioned to be movable along the longitudinal direction in the body part (100) and capable of adjusting the opening degree of a flow path formed between the first port (101) and the second port (102) (200);
  • a pressure sensitive part 300 including a pressure sensitive member 310 which is expandable and contractible according to a pressure change of the third port 103 to correct the position of the valve part 200;
  • Stage coil 410 formed of a stepped large-diameter portion 411 and a small-diameter
  • control valve for a variable capacity compressor includes a body 100, a valve 200, a pressure sensitive part 300, a driving part 400, and a sleeve 500.
  • control valve for a variable capacity compressor is suitable for application to a known variable capacity compressor which is a key element constituting an air conditioner of a vehicle.
  • the known variable capacity compressor has a crank chamber, a discharge chamber, A suction chamber is formed.
  • variable capacity compressor corresponds to a compressor in a cooling cycle in which a compressor, a condenser, an expansion valve, and an evaporator are provided and perform cooling according to the refrigerant circulation.
  • a swash plate is provided in the crank chamber of the variable capacity compressor, and the control valve for the variable capacity compressor of the present invention is connected to the variable capacity compressor to control the inclination angle of the swash plate by switching the flow path of the refrigerant.
  • the body part 100 has a substantially hollow pipe shape.
  • the body part 100 has a basic skeleton in the control valve for a variable capacity compressor of the present invention. Or may be provided movably.
  • the body 100 may be a single body composed of only one component, or an assembly of two or more components assembled together.
  • the body part 100 is made of a single body as much as possible in consideration of ease of assembly and the like. However, if the internal shape of the body part 100 is desired to be processed easily or partially in terms of physical properties of a specific material, Will be good.
  • the body portion 100 includes a first port 101, a second port 102, and a third port (not shown) communicating with the crank chamber, the discharge chamber, and the suction chamber formed in the variable capacity compressor, 103 are formed.
  • the first port 101, the second port 102, and the third port 103 are sequentially formed on the body portion 100 from left to right in the drawing,
  • the second port 102 and the third port 103 are formed on the circumferential surface of the body part 100 in such a manner that one or more than one As shown in FIG.
  • a plurality of through holes 131 are radially formed along the rim of the valve seat 130 to allow the refrigerant to flow through the valve seat 130, And may be distributed to the first port 101.
  • the valve seat 130 may be press-fitted to the inner circumferential surface of the first port 101 in a non-adjustable position or may be screwed to adjust the fixing position of the valve seat 130,
  • a separate filter 132 may be additionally installed at the end of the first port 101 to filter the foreign substances from the refrigerant passing through the first port 101.
  • the valve seat 130 will be controlled by a gap between the valve seat 200 and the valve seat 200 to function as a variable orifice, which will be described later.
  • a generally rectangular filter frame 140 may be provided around the second port 102.
  • a porous filter not shown in the drawing may be attached to the filter frame 140, It is possible to filter out the foreign substances contained in the refrigerant flowing through the refrigerant circulation pipe 102.
  • reference numeral 105 denotes a sealing ring made of an elastic sealing material provided on the outer circumferential surface of the body part 100 to maintain airtightness.
  • a sealing ring 105 is positioned between the respective ports, 100 have been illustrated with three seals 105 applied thereto.
  • valve unit 200 may be disposed within the body 100 and be movable along the longitudinal direction.
  • the valve unit 200 may also be formed of a unitary body or an assembly .
  • the main valve 210 and the valve shaft 220 are connected to each other by screws 211.
  • the main valve 210 and the valve shaft 220 are connected to each other by a screw Or they can be integrated with each other.
  • the main valve 210 functions to regulate the opening of the flow path formed between the first port 101 and the second port 102 in the body 100 described above.
  • the main valve 210 is not only switched between a fully opened state and a fully closed state, but serves to precisely control the opening of the flow path between the opened state and the closed state as illustrated in FIG. 9 And precise control of this opening degree can be performed by the pressure-sensitive portion 300 to be described later.
  • the pressure sensing unit 300 includes a pressure sensitive member 310 that is stretchable and contractible in response to a change in peripheral pressure.
  • the pressure sensing unit 300 includes a pressure sensing member 310, (100).
  • the pressure sensitive member 310 is affected by the refrigerant pressure of the third port 103, that is, the refrigerant pressure in the suction chamber of the variable capacity compressor, So that precise control can be performed.
  • the pressure sensitive member 310 when the pressure of the refrigerant applied to the pressure sensitive member 310 is high, the pressure sensitive member 310 is contracted, and when the pressure of the refrigerant is low, the pressure sensitive member 310 is extended .
  • the expansion and contraction of the pressure sensitive member 310 affects the position control of the valve part 200.
  • the driving unit 400 corresponds to a well-known solenoid driving mechanism including a coil and a plunger. Particularly, in the present invention, And a two-stage coil 410 made up of a small-diameter portion 411 and a small-diameter portion 412.
  • the two-stage coil 410 may be provided in a cylindrical casing 440, and reference numeral 401 denotes a seal provided on an outer circumferential surface of the driving unit 400.
  • the large-diameter portion 411 having an inner diameter larger than that of the small-diameter portion 412 is formed on the inner circumferential surface of the outer circumferential surface of the two-stage coil 410 about the entire length of the two- And is formed to have a length corresponding to 1/3 to 1/2.
  • the two-stage coil 410 can be formed by making the numbers of turns of the small-diameter portion 412 and the large-diameter portion 411 different from each other.
  • the plunger 420 is positioned so as to be inserted into the two-stage coil 410.
  • the plunger 420 is moved in accordance with the magnetic force of the two- will be.
  • the plunger 420 is positioned so as to be completely accommodated in the two-stage coil 410 described above, or is not located completely out of the two-stage coil 410 described above.
  • the reason that the plunger 420 is completely accommodated in the two-stage coil 410 is that the entire length of the two-stage coil 410 is overlapped to accommodate the entire length of the plunger 420 It means.
  • the fact that the plunger 420 is located completely out of the two-stage coil 410 means that the entire length of the two-stage coil 410 is positioned so that no part of the entire length of the plunger 420 overlaps .
  • the distance between the valve portion 200 and the plunger 420 is relatively close, which is good for accurately maintaining the concentricity or coaxiality between the components.
  • the plunger 420 is too far away from the coil, It is difficult to obtain a high driving force at a desired level.
  • the plunger 420 is positioned in the two-stage coil 410, so that the desired driving force of the plunger 420 can be obtained while maintaining the concentricity and coaxiality between the components accurately.
  • the left end of the plunger 420 is connected to the outer circumferential surface of the valve shaft 220 of the valve unit 200 and the right part of the plunger 420 is connected to the large diameter portion 411 of the two- As shown in FIG.
  • the position where the plunger 420 can be fully inserted to the right in the drawing is a position where the entirety of the two-stage coil 410, which is the large-diameter portion 411 formed in the two-stage coil 410, About 1/3 to 1/2 of the length.
  • a coil spring 450 is provided between the two-stage coil 410 and the plunger 420 so that the plunger 420 moves from the two-stage coil 410 to the left side in the drawing And is elastically supported to be spaced apart.
  • a separate step 421 for contacting the coil spring 450 may be formed on the outer circumferential surface of the plunger 420.
  • the valve shaft 220 is connected to the left end of the plunger 420 such that the valve shaft 220 is integrally movable with respect to the valve shaft 220. As the plunger 420 moves, The entire body 200 can be moved together.
  • the inner circumferential surface of the body 100 and the outer circumferential surface of the plunger 420 are spaced apart from each other to reduce the influence of the magnetic force, thereby reducing the frictional resistance And a sleeve 500 of a non-magnetic material interposed therebetween.
  • the sleeve 500 is made of a non-magnetic material in the form of a hollow pipe having a thickness of about 1 mm or less, more preferably 0.5 mm or less.
  • the gap between the inner circumferential surface of the body 100 and the outer circumferential surface of the plunger 420 can be maintained constant by the sleeve 500.
  • the yoke 120 made of a paramagnetic material is further added to the body portion 100 to extend the magnetic force formed in the driving portion 400 toward the left side in the drawing where the plunger 420 is located,
  • the sleeve 500 made of a nonmagnetic material is positioned between the yoke 120 made of a paramagnetic material and the plunger 420 made of a paramagnetic material in the driving part 400.
  • the sliding resistance between the plunger 420 and the yoke 120 is reduced by locating the sleeve 500 made of non-magnetic material between the plunger 420 and the yoke 120, The role is to be effective.
  • the present applicant has measured the sliding resistance generated between the plunger 420 and the yoke 120 while increasing or decreasing the thickness of the sleeve 500. As a result, even when the thickness of the sleeve 500 is 0.1 mm, Respectively.
  • the sliding resistance between the plunger 420 and the yoke 120 can be improved by appropriately changing the thickness of the sleeve 500 without reducing the driving force of the plunger 420 It is possible to appropriately reduce it.
  • the body 100 of the present invention includes a main body 110 having the first port 101 and the second port 102 formed therein, And a yoke (120) having the third port (103) and made of a paramagnetic material;
  • the sleeve 500 is interposed between the inner circumferential surface of the yoke 120 and the outer circumferential surface of the plunger 420.
  • a second port 102 may be formed, and the third port 103 may be formed in the yoke 120.
  • the pressure sensitive part 300 includes a bellows which is a pressure sensitive member 310 having an elastic body 311 therein, and is disposed in the plunger 420 Stage coil 410.
  • the other side of the core 430 may be selectively in contact with the valve 200 according to the elongation and contraction of the bellows.
  • first and second support members 312 and 313 are provided at both ends of the bellows, which is the pressure sensitive member 310 of the pressure sensitive part 300, and an elastic body 311 is provided so as to be elastically stretched in the bellows. .
  • the elastic body 311 elastically extends the pressure of the refrigerant.
  • the pressure of the refrigerant acting on the pressure sensitive member 310 is high, .
  • the pressure sensing part 300 may be disposed within the plunger 420 so that the plunger 420 may be formed in a housing shape to accommodate the pressure sensing part 300 .
  • a through hole 422 is formed in the circumferential surface of the plunger 420 so that the refrigerant pressure of the third port 103 is smoothly applied to the pressure sensing part 300 through the plunger 420 Will be good.
  • An adjustment screw 320 is connected to the second support member 313 on the right side of the pressure sensitive part 300.
  • the adjusting screw 320 is fixed to the inner circumferential surface of the core 430, and the adjusting screw 320 is rotated to change the engaging position. As a result, It is also possible to finely adjust the support position of the pressure sensitive member 310.
  • the first support member 312 provided on the left side of the pressure sensitive portion 300 may be selectively brought into contact with the valve portion 200 according to the expansion and contraction of the bellows as the pressure sensitive member 310 .
  • valve unit 200 basically acts on the elastic body 311, the plunger 420, and the pressure sensitive part 300 in a complex manner, It becomes possible to appropriately control it.
  • the sleeve 500 is supported by the core 430 and fixed in position.
  • the sleeve 500 is positioned between the outer circumferential surface of the plunger 420 and the inner circumferential surface of the yoke 120 of the body 100, and the sleeve 500 is integrally formed with the core 430 And the yoke 120 is integrally connected to the sleeve 500, it is possible to reduce the number of assembled parts.
  • a bypass passage 221 for connecting the first port 101 and the third port 103 is additionally formed in the valve portion 200 of the valve 200, It is preferable to perform the variable orifice function while the clearance with the valve seat 130 changes during forward and backward movement.
  • variable capacity compressor In a conventional conventional variable capacity compressor, a separate orifice is provided inside or outside the body of the variable capacity compressor in order to directly discharge the refrigerant in the crankcase into the suction chamber for the purpose of effective control of the compressor.
  • the opening orifice is not provided separately and has a fixed orifice shape having a constant diameter, the compression efficiency of the variable capacity compressor is greatly reduced due to the discharge of the refrigerant in the crankcase to the suction chamber even when the fixed orifice is not required. .
  • both the main valve 210 and the valve shaft 220 are formed as a hollow body in the valve unit 200, and the first port 101 and the third port 103 can communicate with each other
  • the bypass passage 221 is formed in the valve portion 200 so that the bypass passage 221 is formed.
  • bypass passage 221 is further formed in the valve shaft 220 as shown in FIG. 6 so that the inside of the valve portion 200 and the third port 103 are communicated with each other It would be desirable to be able to do so.
  • variable orifice composed of the first port 101, the valve seat 130 and the main valve 210, the bypass passage 221 of the valve shaft 220, and the third port 103 As shown in FIG.
  • variable orifice configured as described above is adapted to automatically discharge the refrigerant in the crank chamber to the suction chamber by adjusting the clearance between the valve portion 200 and the valve seat 130 when the valve portion 200 moves back and forth .
  • the opening degree between the main valve 210 and the valve seat 130 is appropriately adjusted even when the valve portion 200 moves forward and backward by the pressure sensitive portion 300 .
  • variable orifice to the control valve for the variable displacement compressor, it is possible to greatly improve the compression efficiency of the variable displacement compressor while eliminating the existing fixed orifice.
  • control valve for a variable capacity compressor of the present invention having the above-described structure, when no power is applied to the driving unit 400, when the amount of current is 100% applied to the driving unit 400, , And each case will be separately described below.
  • the driving unit 400 When the power is not applied to the control valve for the variable capacity compressor of the present invention, the driving unit 400 does not operate, and the plunger 420 moves to the left side in the drawing by the elastic force of the coil spring 450 only.
  • valve unit 200 including the main valve 210 moves to the left through the valve shaft 220 connected to the plunger 420.
  • the amount of refrigerant discharged from the variable displacement compressor is minimized by controlling the inclination angle of the swash plate to be as small as possible as the refrigerant pressure in the crank chamber rises in the variable displacement compressor, and the variable orifice is closed, The refrigerant is not discharged.
  • valve unit 200 including the main valve 210 moves to the right through the valve shaft 220 connected to the plunger 420.
  • the main valve 210 closes the flow path between the first port 101 and the second port 102 formed in the body portion 100 as shown in FIG. 8, There is no flow of coolant through the crankcase, and in this case, the variable orifice is opened to the maximum.
  • the amount of refrigerant discharged from the variable displacement compressor is maximized by controlling the inclination angle of the swash plate as large as possible as the refrigerant pressure in the crank chamber decreases in the variable displacement compressor.
  • the refrigerant is quickly discharged to the suction chamber, effectively increasing the compression efficiency.
  • control valve for the variable capacity compressor of the present invention is appropriately regulated and supplied with power, a proper amount of current is supplied to the driving unit 400.
  • the pressure of the refrigerant in the crankcase is applied to the pressure sensing part 300.
  • the entire valve portion 200 including the main valve 210 moves through the valve shaft 220 connected to the plunger 420 in accordance with the refrigerant pressure change in the suction chamber to the left or right in the drawing will be.
  • the main valve 210 appropriately adjusts the opening degree of the flow path between the first port 101 and the second port 102 formed in the body portion 100 as shown in FIG. 9, So that the amount of refrigerant discharged from the variable displacement compressor is optimized by controlling the slope angle of the swash plate to be suitably large or small while repeatedly raising or lowering the refrigerant pressure in the crank chamber.
  • variable orifice also appropriately adjusts the opening degree between the main valve 210 and the valve seat 130 in accordance with the movement of the valve unit 200, thereby improving the compression efficiency of the variable capacity compressor It will help.
  • the control valve for variable capacity compressors performing the basic operation as described above, since only a part of the plunger 420 is located in the two-stage coil 410 as shown in FIG. 6, The distance between the valve portions 200 is relatively short so that the desired driving force of the plunger 420 can be obtained while maintaining the concentricity and the coaxiality between the components accurately.
  • the present invention it is possible to obtain a high driving force even if only a part of the plunger 420 is placed in the two-stage coil 410 by adding the yoke 120 made of the paramagnetic material,
  • the sleeve 500 made of a non-magnetic material is positioned between the yoke 120 made of a box-like material and the plunger 420 made of a box-like material in the driving unit 400, so that the plunger 420 and the yoke 120 Thereby effectively reducing the sliding resistance acting on each other.
  • the sliding portion 500 reduces the influence of the magnetic force acting between the plunger 420 and the yoke 120 and reduces the influence of the magnetic force acting between the plunger 420 and the inner peripheral surface of the yoke 120, It is possible to effectively prevent the driving force of the plunger 420 from being reduced by effectively reducing the frictional resistance of the plunger 420.
  • variable orifice is integrally formed in the control valve for the variable displacement compressor, so that the refrigerant in the crank chamber can be quickly discharged to the suction chamber as required, thereby effectively increasing the compression efficiency.
  • the present invention can prevent the interference that may occur due to the turning of the center by increasing the concentricity and the coaxiality between the components by applying a two-stage coil for receiving and driving a part of the plunger in the control valve for the variable capacity compressor, By increasing the driving force, the valve control is performed with high accuracy. Particularly, by adding the non-magnetic material sleeve to the sliding portion, the influence by the magnetic force is reduced and the sliding resistance is reduced. And to maximize market competitiveness while increasing commerciality.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Magnetically Actuated Valves (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

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.

Description

가변용량 압축기용 제어밸브Control valve for variable capacity compressors
본 발명은 가변용량 압축기용 제어밸브에 관한 것으로서 특히, 가변용량 압축기용 제어밸브에 플런저의 일부를 수용하여 구동시키는 2단 코일을 적용하여 부품간의 동심도를 높이는 동시에 구동력을 증대시키는 한편 비자성재의 슬리브를 부가하여 동작이 보다 원활하게 이루어지도록 하기 위한 것으로써, 중심이 틀어져 발생할 수 있는 간섭을 미연에 예방할 수 있으며, 정확도 높게 밸브 제어를 수행하고, 특히 제품의 신뢰도 및 상품성을 증대시키면서 시장경쟁력을 극대화시킬 수 있는 것에 관한 것이다.[0001] The present invention relates to a control valve for a variable capacity compressor, and particularly to a control valve for a variable capacity compressor, in which a two-stage coil for accommodating and driving a part of a plunger is applied to increase concentricity between parts and increase driving force, So as to prevent the interference which may occur due to the turning of the center and to perform the valve control with high accuracy and to maximize the market competitiveness while increasing the reliability and merchability of the product It's about what you can do.
일반적으로 차량용 공조장치에 적용되는 냉매용 압축기는 엔진의 회전력을 전달 받아 구동하기 때문에, 압축기의 구동이 엔진의 회전속도, 즉 분당회전수에 의존하게 되며, 이에 따라 압축기의 압축 용량 또한 엔진의 분당회전수에 큰 영향을 받게 된다.Generally, since a compressor for a refrigerant applied to a vehicle air conditioner is driven by receiving the rotational force of the engine, the driving of the compressor depends on the rotational speed of the engine, that is, the rotational speed per minute, The rotation speed is greatly influenced.
그 결과, 차량의 냉방 성능이 엔진의 분당회전수에 의해 결정되기 때문에 냉방 제어가 자유롭지 못하여, 엔진의 분당회전수에 의존하지 않고 냉매의 토출 용량을 가변시켜 적절한 냉방을 실시하는 가변용량 압축기가 널리 적용되고 있는 실정이다.As a result, since the cooling performance of the vehicle is determined by the number of revolutions per minute of the engine, the cooling control is not free, and the variable capacity compressor which performs the proper cooling by varying the discharge capacity of the refrigerant irrespective of the revolution speed per minute of the engine is widely It has been applied.
일반적인 가변용량 압축기는 엔진의 회전력을 전달 받아 회전하는 크랭크축에 사판이 마련되어, 이 사판의 경사각을 적절하게 조절함으로써 가변용량 압축기는 냉매의 토출 용량을 가변시키게 되는 것이다.In a general variable capacity compressor, a swash plate is provided on a crankshaft that is rotated by receiving the rotational force of the engine, and the variable displacement compressor varies the discharge capacity of the refrigerant by appropriately adjusting the inclination angle of the swash plate.
이와 같은 사판의 경사각 제어를 위하여 가변용량 압축기에는 제어밸브가 마련되며, 이러한 종래의 가변용량 압축기용 제어밸브 중 하나가 국내 등록특허공보 제10-933830호에 개시되어 있다.In order to control the inclination angle of the swash plate, a control valve is provided in the variable displacement compressor. One of the conventional control valves for the variable displacement compressor is disclosed in Korean Patent Registration No. 10-933830.
그러나, 이러한 종래의 가변용량 압축기용 제어밸브는 다음과 같은 몇 가지 기술상의 문제점을 가지고 있었다.However, such conventional control valves for variable capacity compressors have some technical problems as follows.
첫째, 제어밸브에 있어서 코일에 의해 구동하는 플런저가 상기 코일 내에 위치하는 반면, 실제 개폐를 단속하는 밸브체는 상기 플런저의 반대측에 마련되어 있기 때문에, 플런저로부터 밸브체에 이르기까지의 길이가 길어 부품간의 동심도 및 동축도를 정확하게 유지하기 어려워 부품 상호간의 간섭이나 작동 불량은 물론 진동 및 소음이 빈번하게 발생하고 있었다.First, since the valve body for controlling the opening and closing of the valve is provided on the opposite side of the plunger, while the plunger driven by the coil is located in the coil, the length from the plunger to the valve body is long, It is difficult to accurately maintain the concentricity and coaxiality, and vibration and noise are frequently generated as well as interference and malfunction between components.
둘째, 플런저가 코일 내부에 위치하기 때문에 플런저의 외경을 코일의 내경 보다 작게 설계할 필요가 있으며, 이에 따라, 소망하는 수준의 높은 구동력을 얻기 어려웠다.Secondly, since the plunger is located inside the coil, it is necessary to design the outer diameter of the plunger to be smaller than the inner diameter of the coil, so that it is difficult to obtain a high driving force at a desired level.
셋째, 플런저 자체 또는 플런저에 결합하여 이동하는 부품과 기타 위치 고정되어 있는 부품 간의 습동부분에 지속적인 마찰저항이 발생하게 되며 특히 자력의 영향으로 이러한 저항이 더욱 증대되어 제어밸브의 구동력을 저하시키는 원인이 되고 있었다.Third, the friction between the moving plunger itself or the plunger and other fixed parts causes friction resistance. This resistance is increased due to the magnetic force, which causes the driving force of the control valve to be lowered. .
본 발명은 상기의 문제점을 해소하기 위한 것으로, 가변용량 압축기용 제어밸브에 플런저의 일부를 수용하여 구동시키는 2단 코일을 적용하여 부품간의 동심도 및 동축도를 높임으로써 중심이 틀어져 발생할 수 있는 간섭을 미연에 예방할 수 있으며, 구동력을 증대시킴으로써 정확도 높게 밸브 제어를 수행하고, 특히 습동부분에 비자성재의 슬리브를 부가하여 자력에 의한 영향을 감소시키는 한편 습동저항을 저감시킴으로써 밸브의 보다 원활한 동작이 이루어질 수 있음으로써, 제품의 신뢰도 및 상품성을 증대시키면서 시장경쟁력을 극대화시킬 수 있도록 하는 가변용량 압축기용 제어밸브를 제공하고자 한다.SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a control valve for a variable capacity compressor, in which a part of a plunger is accommodated and a two- The valve control can be performed with high accuracy by increasing the driving force. In particular, the non-magnetic material sleeve is added to the sliding portion to reduce the influence by the magnetic force and reduce the sliding resistance, The present invention provides a control valve for a variable displacement compressor that maximizes market competitiveness while increasing reliability and merchantability of the product.
이러한 본 발명은 크랭크실, 토출실, 그리고 흡입실이 형성되고 상기 크랭크실 내에 사판을 구비한 가변용량 압축기에 접속되어 냉매의 유로 절환을 통해 상기 사판의 경사각을 제어하는 제어밸브에 있어서; 상기 크랭크실, 상기 토출실, 그리고 상기 흡입실에 각각 연통되는 제1포트, 제2포트, 그리고 제3포트가 형성되는 중공의 몸체부와; 상기 몸체부 내에서 길이방향을 따라 이동 가능하도록 위치하여 상기 제1포트와 상기 제2포트 간에 형성된 유로의 개도를 조절 가능한 메인 밸브를 포함하는 밸브부와; 상기 제3포트의 압력 변화에 따라 신축 가능한 압력감응부재를 포함하여 상기 밸브부의 위치를 보정하는 압력 감응부와; 내경이 서로 다른 계단형태의 대경부분과 소경부분으로 이루어지며 공급되는 전류량에 대응하는 자력을 형성하는 2단 코일과, 일측 말단이 상기 밸브부에 연결되며 타측 일부가 상기 2단 코일의 대경부분 내에 삽입되어 진퇴 가능한 플런저를 포함하는 구동부와; 상기 몸체부의 내주면과 상기 플런저의 외주면 간에 상호 간극이 이격된 상태를 유지함으로써 자력의 영향을 감소시켜 마찰저항을 저감시키도록 개재되는 비자성재의 슬리브를 포함함으로써 달성된다.The control valve is connected to a variable capacity compressor having a crank chamber, a discharge chamber, and a suction chamber and having a swash plate in the crank chamber, and controls the inclination angle of the swash plate through the passage switching of the refrigerant. A hollow body portion having a first port, a second port, and a third port communicating with the crank chamber, the discharge chamber, and the suction chamber, respectively; And a main valve positioned to be movable along the longitudinal direction in the body portion and capable of adjusting an opening degree of a flow path formed between the first port and the second port; A pressure sensitive part including a pressure sensitive member that is expandable and contractible in accordance with a pressure change of the third port to correct a position of the valve part; Stage coil having a large-diameter portion and a small-diameter portion with different inner diameters and forming a magnetic force corresponding to the amount of supplied current, and a two-stage coil having one end connected to the valve portion and the other portion connected to the large- A driving unit including a plunger that is inserted and retractable; And a sleeve of a non-magnetic material interposed between the inner circumferential surface of the body portion and the outer circumferential surface of the plunger so as to reduce the influence of the magnetic force and reduce the frictional resistance by maintaining a state in which mutual gaps are spaced from each other.
여기에서, 상기 몸체부는, 상기 제1포트 및 상기 제2포트가 형성되는 메인 몸체와 상기 제3포트가 형성되되 상자성재로 이루어진 요크를 포함하며; 상기 슬리브는 상기 요크의 내주면과 상기 플런저의 외주면 사이에 개재되는 것이 좋을 것이다.Here, the body portion may include a main body having the first port and the second port formed therein, and a yoke having the third port and made of a paramagnetic material; The sleeve may be interposed between the inner circumferential surface of the yoke and the outer circumferential surface of the plunger.
이와 함께, 상기 압력 감응부는, 내부에 탄성체를 구비한 압력감응부재인 벨로우즈를 포함하여 상기 플런저 내에 위치하며, 일측은 상기 2단 코일의 내측에 위치하는 코어에 고정되고, 타측은 상기 벨로우즈의 신축에 따라 상기 밸브부와 선택적으로 접촉하는 것이 양호할 것이다.In addition, the pressure responsive portion includes a bellows, which is a pressure sensitive member having an elastic body therein, and is located in the plunger. One side of the bellows is fixed to a core located inside the two-stage coil, It may be preferable to selectively contact the valve portion according to the position of the valve body.
이때, 상기 슬리브는 상기 코어에 지지되어 위치 고정되는 것이 바람직할 것이다.At this time, it is preferable that the sleeve is supported on the core and fixed in position.
마지막으로, 상기 밸브부에는 상기 제1포트와 상기 제3포트를 연통시키는 바이패스 통로가 추가 형성되어, 상기 밸브부의 진퇴 시에 밸브시트와의 간극이 변화하면서 가변 오리피스 기능을 수행하는 것도 가능할 것이다.Finally, the valve portion may further include a bypass passage for communicating the first port and the third port, so that the gap between the valve portion and the valve seat may be changed while the valve portion is advanced or retracted, thereby performing a variable orifice function .
이상과 같은 본 발명은 가변용량 압축기용 제어밸브에 플런저의 일부를 수용하여 구동시키는 2단 코일을 적용하여 부품간의 동심도 및 동축도를 높임으로써 중심이 틀어져 발생할 수 있는 간섭을 미연에 예방할 수 있으며, 구동력을 증대시킴으로써 정확도 높게 밸브 제어를 수행하고, 특히 습동부분에 비자성재의 슬리브를 부가하여 자력에 의한 영향을 감소시키는 한편 습동저항을 저감시킴으로써 밸브의 보다 원활한 동작이 이루어질 수 있음으로써, 제품의 신뢰도 및 상품성을 증대시키면서 시장경쟁력을 극대화시킬 수 있는 발명인 것이다.As described above, the present invention can prevent the interference that may occur due to the turning of the center by increasing the concentricity and the coaxiality between the components by applying a two-stage coil for receiving and driving a part of the plunger in the control valve for the variable capacity compressor, By increasing the driving force, the valve control is performed with high accuracy. Particularly, by adding the non-magnetic material sleeve to the sliding portion, the influence by the magnetic force is reduced and the sliding resistance is reduced. And to maximize market competitiveness while increasing commerciality.
도 1은 본 발명에 따른 가변용량 압축기용 제어밸브를 도시하는 사시도,1 is a perspective view showing a control valve for a variable capacity compressor according to the present invention,
도 2는 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 몸체부의 일부를 분해한 분해사시도,FIG. 2 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention,
도 3은 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 구동부를 분해한 분해사시도,FIG. 3 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention,
도 4는 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 밸브부를 분해한 분해사시도,FIG. 4 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention,
도 5는 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 압력감응부를 분해한 분해사시도,FIG. 5 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention,
도 6은 본 발명에 따른 가변용량 압축기용 제어밸브를 도시하는 단면도,6 is a sectional view showing a control valve for a variable capacity compressor according to the present invention,
도 7은 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 구동부에 전원이 인가되지 않는 경우를 나타내는 도 6의 A부분에 대한 확대도,FIG. 7 is an enlarged view of a portion A of FIG. 6 showing a case where power is not applied to a driving portion in a control valve for a variable capacity compressor according to the present invention,
도 8은 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 구동부에 전류량이 100% 인가되는 경우를 나타내는 도 6의 A부분에 대한 확대도,FIG. 8 is an enlarged view of a portion A in FIG. 6 showing a case where a current amount is applied to a driving portion in a control valve for a variable capacity compressor according to the present invention,
도 9는 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 구동부에 전류량이 적절하게 조절되어 인가되는 경우를 나타내는 도 6의 A부분에 대한 확대도,FIG. 9 is an enlarged view of a portion A of FIG. 6 showing a case where a current amount is appropriately adjusted and applied to a drive portion in a control valve for a variable capacity compressor according to the present invention,
도 10은 도 6에 있어서 B부분에 대한 확대도.Fig. 10 is an enlarged view of a portion B in Fig. 6; Fig.
[부호의 설명][Description of Symbols]
100 : 몸체부 101 : 제1포트100: body part 101: first port
102 : 제2포트 103 : 제3포트102: second port 103: third port
105 : 씰링 106 : 밸브기구105: Sealing 106: Valve mechanism
110 : 메인 몸체 120 : 요크110: main body 120: yoke
130 : 밸브시트 131 : 통공130: valve seat 131: through hole
132 : 필터 140 : 필터 프레임132: filter 140: filter frame
200 : 밸브부 210 : 메인 밸브200: valve part 210: main valve
220 : 밸브 샤프트 221 : 바이패스 통로220: valve shaft 221: bypass passage
300 : 압력 감응부 301 : 씰링300: Pressure sensitive part 301: Sealing
310 : 압력감응부재 311 : 탄성체310: Pressure sensitive member 311: Elastic body
312 : 제1지지부재 313 : 제2지지부재312: first support member 313: second support member
320 : 조절나사 400 : 구동부320: adjusting screw 400:
401 : 씰링 410 : 2단 코일401: sealing 410: two-stage coil
411 : 대경부분 412 : 소경부분411: large diameter portion 412: small diameter portion
420 : 플런저 421 : 단턱420: plunger 421: step
422 : 통공 430 : 코어422: through hole 430: core
440 : 케이싱 450 : 코일스프링440: casing 450: coil spring
500 : 슬리브500: Sleeve
도 1은 본 발명에 따른 가변용량 압축기용 제어밸브를 도시하는 사시도이며, 도 2는 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 몸체부의 일부를 분해한 분해사시도이고, 도 3은 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 구동부를 분해한 분해사시도이다.FIG. 1 is a perspective view showing a control valve for a variable capacity compressor according to the present invention, FIG. 2 is an exploded perspective view of a part of a body portion of a control valve for a variable capacity compressor according to the present invention, Fig. 2 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention.
그리고, 도 4는 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 밸브부를 분해한 분해사시도이며, 도 5는 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 압력감응부를 분해한 분해사시도이고, 도 6은 본 발명에 따른 가변용량 압축기용 제어밸브를 도시하는 단면도이다.4 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention in which a valve portion is disassembled; FIG. 5 is an exploded perspective view of a control valve for a variable capacity compressor according to the present invention, 6 is a sectional view showing a control valve for a variable capacity compressor according to the present invention.
또한, 도 7은 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 구동부에 전원이 인가되지 않는 경우를 나타내는 도 6의 A부분에 대한 확대도이며, 도 8은 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 구동부에 전류량이 100% 인가되는 경우를 나타내는 도 6의 A부분에 대한 확대도이고, 도 9는 본 발명에 따른 가변용량 압축기용 제어밸브에 있어서 구동부에 전류량이 적절하게 조절되어 인가되는 경우를 나타내는 도 6의 A부분에 대한 확대도이다.FIG. 7 is an enlarged view of a portion A of FIG. 6 showing the case where power is not applied to the driving portion in the control valve for the variable capacity compressor according to the present invention. FIG. FIG. 9 is an enlarged view of a portion A in FIG. 6 showing a case where a current amount is applied to a driving portion of the valve in FIG. 6; FIG. 9 is a cross- Fig. 6 is an enlarged view of a portion A in Fig.
마지막으로, 도 10은 도 6에 있어서 B부분에 대한 확대도이다.Finally, FIG. 10 is an enlarged view of the portion B in FIG.
본 발명의 가변용량 압축기용 제어밸브는 플런저의 일부를 수용하여 구동시키는 2단 코일(410)을 적용하여 부품간의 동심도 및 동축도를 높임으로써 중심이 틀어져 발생할 수 있는 간섭을 미연에 예방할 수 있으며, 구동력을 증대시킴으로써 정확도 높게 밸브 제어를 수행하고, 특히 습동부분에 비자성재의 슬리브(500)를 부가하여 자력에 의한 영향을 감소시키는 한편 습동저항을 저감시킴으로써 밸브의 보다 원활한 동작이 이루어질 수 있음으로써, 제품의 신뢰도 및 상품성을 증대시키면서 시장경쟁력을 극대화시킬 수 있는 것을 그 기술상의 기본 특징으로 한다.The control valve for a variable capacity compressor according to the present invention can prevent interference that may occur due to the center turning by increasing the concentricity and coaxiality between parts by applying a two stage coil 410 which receives and drives a part of the plunger, By performing the valve control with high accuracy by increasing the driving force, the sleeve 500 of the non-magnetic material can be added to the sliding portion in particular to reduce the influence by the magnetic force and reduce the sliding resistance, The basic feature of the technology is that it maximizes market competitiveness while increasing the reliability and merchability of the product.
본 발명의 실시예를 첨부 도면을 참조하여 상세히 설명하면 다음과 같다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명에 따른 가변용량 압축기용 제어밸브는 도 1 내지 도 5에 도시한 바와 같이, 크랭크실, 토출실, 그리고 흡입실이 형성되고 상기 크랭크실 내에 사판을 구비한 가변용량 압축기에 접속되어 냉매의 유로 절환을 통해 상기 사판의 경사각을 제어하는 제어밸브에 있어서; 상기 크랭크실, 상기 토출실, 그리고 상기 흡입실에 각각 연통되는 제1포트(101), 제2포트(102), 그리고 제3포트(103)가 형성되는 중공의 몸체부(100)와; 상기 몸체부(100) 내에서 길이방향을 따라 이동 가능하도록 위치하여 상기 제1포트(101)와 상기 제2포트(102) 간에 형성된 유로의 개도를 조절 가능한 메인 밸브(210)를 포함하는 밸브부(200)와; 상기 제3포트(103)의 압력 변화에 따라 신축 가능한 압력감응부재(310)를 포함하여 상기 밸브부(200)의 위치를 보정하는 압력 감응부(300)와; 내경이 서로 다른 계단형태의 대경부분(411)과 소경부분(412)으로 이루어지며 공급되는 전류량에 대응하는 자력을 형성하는 2단 코일(410)과, 일측 말단이 상기 밸브부(200)에 연결되며 타측 일부가 상기 2단 코일(410)의 대경부분(411) 내에 삽입되어 진퇴 가능한 플런저(420)를 포함하는 구동부(400)와; 상기 몸체부(100)의 내주면과 상기 플런저(420)의 외주면 간에 상호 간극이 이격된 상태를 유지함으로써 자력의 영향을 감소시켜 마찰저항을 저감시키도록 개재되는 비자성재의 슬리브(500)를 포함하는 것이 바람직할 것이다.1 to 5, a control valve for a variable capacity compressor according to the present invention is connected to a variable displacement compressor provided with a crank chamber, a discharge chamber, and a suction chamber, and having a swash plate in the crank chamber, 1. A control valve for controlling an inclination angle of a swash plate by switching a flow path, comprising: A hollow body portion 100 in which a first port 101, a second port 102, and a third port 103 communicating with the crank chamber, the discharge chamber, and the suction chamber are formed; And a main valve (210) positioned to be movable along the longitudinal direction in the body part (100) and capable of adjusting the opening degree of a flow path formed between the first port (101) and the second port (102) (200); A pressure sensitive part 300 including a pressure sensitive member 310 which is expandable and contractible according to a pressure change of the third port 103 to correct the position of the valve part 200; Stage coil 410 formed of a stepped large-diameter portion 411 and a small-diameter portion 412 having different inner diameters and forming a magnetic force corresponding to the amount of supplied current, and a two-stage coil 410 having one end connected to the valve portion 200 And a plunger (420) inserted into the large diameter portion (411) of the two-stage coil (410) and movable forward and backward; And a sleeve (500) of a nonmagnetic material interposed to reduce frictional resistance by reducing the influence of the magnetic force by maintaining a state in which mutual gaps are maintained between the inner circumferential surface of the body part (100) and the outer circumferential surface of the plunger Lt; / RTI >
즉, 본 발명에 따른 가변용량 압축기용 제어밸브는 크게 몸체부(100), 밸브부(200), 압력 감응부(300), 구동부(400), 그리고 슬리브(500)를 포함하고 있다.That is, the control valve for a variable capacity compressor according to the present invention includes a body 100, a valve 200, a pressure sensitive part 300, a driving part 400, and a sleeve 500.
기본적으로 본 발명의 가변용량 압축기용 제어밸브는 차량의 공조장치를 구성하는 핵심 요소인 주지의 가변용량 압축기에 적용하기에 적합한 것으로, 주지의 가변용량 압축기는 그 내부에 크랭크실, 토출실, 그리고 흡입실이 형성되어 있다.Basically, the control valve for a variable capacity compressor according to the present invention is suitable for application to a known variable capacity compressor which is a key element constituting an air conditioner of a vehicle. The known variable capacity compressor has a crank chamber, a discharge chamber, A suction chamber is formed.
이와 같은 가변용량 압축기는, 압축기, 응축기, 팽창밸브, 그리고 증발기로 이루어져 냉매 순환에 따라 냉방을 실시하는 냉방사이클에 있어서 압축기에 해당하는 것이다.Such a variable capacity compressor corresponds to a compressor in a cooling cycle in which a compressor, a condenser, an expansion valve, and an evaporator are provided and perform cooling according to the refrigerant circulation.
이때, 상기 가변용량 압축기의 크랭크실 내에는 사판이 마련되어 있으며, 본 발명의 가변용량 압축기용 제어밸브는 이러한 가변용량 압축기에 접속되어 냉매의 유로 절환을 통해 상기 사판의 경사각을 제어하게 되는 것이다.At this time, a swash plate is provided in the crank chamber of the variable capacity compressor, and the control valve for the variable capacity compressor of the present invention is connected to the variable capacity compressor to control the inclination angle of the swash plate by switching the flow path of the refrigerant.
여기에서, 크랭크실에 공급되는 냉매의 압력을 낮춰 상기 사판의 경사각을 크게 제어하는 경우, 상기 가변용량 압축기에서 토출되는 냉매의 양이 증가하게 되어 냉방 효과를 높이게 된다.Here, when the pressure of the refrigerant supplied to the crank chamber is decreased to control the inclination angle of the swash plate, the amount of the refrigerant discharged from the variable capacity compressor increases, thereby increasing the cooling effect.
이와 반대로, 상기 크랭크실에 공급되는 냉매의 압력을 높여 상기 사판의 경사각을 작게 제어하는 경우 상기 가변용량 압축기에서 토출되는 냉매의 양이 감소하게 되어 냉방 효과를 낮추게 되는 것이다.On the other hand, when the pressure of the refrigerant supplied to the crank chamber is increased to control the inclination angle of the swash plate to be small, the amount of refrigerant discharged from the variable capacity compressor decreases, thereby lowering the cooling effect.
우선, 상기 몸체부(100)는 도 2 및 도 6과 같이 대략 중공의 파이프 형상으로 이루어져 본 발명의 가변용량 압축기용 제어밸브에 있어서 기본 골격을 이루는 구성으로, 그 내부에 다양한 구성 부품이 위치 고정되게 또는 이동 가능하게 마련될 수 있는 것이다.As shown in FIGS. 2 and 6, the body part 100 has a substantially hollow pipe shape. The body part 100 has a basic skeleton in the control valve for a variable capacity compressor of the present invention. Or may be provided movably.
여기에서, 상기 몸체부(100)는 오직 하나의 구성품으로 이루어진 단일체이어도 좋고, 둘 이상의 구성품이 하나로 조립된 조립체이어도 양호하다.Here, the body 100 may be a single body composed of only one component, or an assembly of two or more components assembled together.
다만, 몸체부(100)는 조립의 편의성 등을 고려하여 가급적 단일체로 이루어지는 것이 바람직하겠지만, 그 내부 형상의 가공 편의성이나 혹은 부분적으로 특정 소재의 물성, 예를 들어 상자성이나 비자성이 요구되는 경우 조립체로 이루어져도 양호할 것이다.However, it is preferable that the body part 100 is made of a single body as much as possible in consideration of ease of assembly and the like. However, if the internal shape of the body part 100 is desired to be processed easily or partially in terms of physical properties of a specific material, Will be good.
이러한 몸체부(100)는 상기 가변용량 압축기에 형성되어 있는 상기 크랭크실, 상기 토출실, 그리고 상기 흡입실에 각각 연통되도록 제1포트(101), 제2포트(102), 그리고 제3포트(103)가 형성되어 있다.The body portion 100 includes a first port 101, a second port 102, and a third port (not shown) communicating with the crank chamber, the discharge chamber, and the suction chamber formed in the variable capacity compressor, 103 are formed.
이때, 상기 제1포트(101), 상기 제2포트(102), 그리고 상기 제3포트(103)는 도면상 좌측에서 우측을 향하여 상기 몸체부(100)에 순차적으로 형성되며, 상기 제1포트(101)의 경우 좌측을 향하여 1개가 형성된 것으로 예시하였지만, 제2포트(102) 및 제3포트(103)는 상기 몸체부(100)의 둘레면을 따라 각각 한 개 또는 두 개를 초과하는 개수로 방사상 등간격으로 형성될 수 있을 것이다.At this time, the first port 101, the second port 102, and the third port 103 are sequentially formed on the body portion 100 from left to right in the drawing, The second port 102 and the third port 103 are formed on the circumferential surface of the body part 100 in such a manner that one or more than one As shown in FIG.
물론, 이러한 각각의 포트가 지향하는 방향에 제한은 없을 것이다.Of course, there will be no limit to the direction in which each of these ports is directed.
그리고, 상기 제1포트(101)에는 밸브시트(130)가 마련될 수 있으며, 이러한 밸브시트(130)에는 다수의 통공(131)이 테두리를 따라 방사상에 형성되어 냉매가 이 밸브시트(130)를 통과하여 상기 제1포트(101)로 유통될 수 있는 것이다.A plurality of through holes 131 are radially formed along the rim of the valve seat 130 to allow the refrigerant to flow through the valve seat 130, And may be distributed to the first port 101. [
이와 같은 밸브시트(130)는 상기 제1포트(101)의 내주면에 위치 조절 불가하게 압입 결합될 수 있으며, 혹은 나사 결합하여 상기 밸브시트(130)의 고정 위치를 조절할 수도 있을 것이며, 이러한 밸브시트(130)의 바깥 쪽에는 별도의 필터(132)가 상기 제1포트(101)의 말단에 추가로 조립되어 상기 제1포트(101)를 통과하는 냉매로부터 이물질을 여과시키는 것도 가능하다.The valve seat 130 may be press-fitted to the inner circumferential surface of the first port 101 in a non-adjustable position or may be screwed to adjust the fixing position of the valve seat 130, A separate filter 132 may be additionally installed at the end of the first port 101 to filter the foreign substances from the refrigerant passing through the first port 101. [
이러한 밸브시트(130)는 이하에 설명할 밸브부(200)와 상호 간극이 조절되어 가변 오리피스의 기능을 수행할 것이며 이에 대해서는 후술하기로 한다.The valve seat 130 will be controlled by a gap between the valve seat 200 and the valve seat 200 to function as a variable orifice, which will be described later.
또한, 상기 제2포트(102)의 둘레에는 대략 링형상의 필터 프레임(140)이 마련될 수 있으며, 미도시하였지만 얇은 면상의 다공 필터가 상기 필터 프레임(140)에 부가되어 상기 제2포트(102)를 유통하는 냉매에 포함되어 있는 이물질을 여과시킬 수도 있게 된다.A generally rectangular filter frame 140 may be provided around the second port 102. A porous filter not shown in the drawing may be attached to the filter frame 140, It is possible to filter out the foreign substances contained in the refrigerant flowing through the refrigerant circulation pipe 102.
그리고, 도면에 있어서 도면부호 105는 상기 몸체부(100)의 외주면에 마련되어 기밀을 유지하기 위한 탄성 기밀재질의 씰링이며, 도면에는 각각의 포트 사이사이에 씰링(105)이 위치하여 상기 몸체부(100)에는 3개의 씰링(105)이 적용된 것을 예시하였다.In the figure, reference numeral 105 denotes a sealing ring made of an elastic sealing material provided on the outer circumferential surface of the body part 100 to maintain airtightness. In the figure, a sealing ring 105 is positioned between the respective ports, 100 have been illustrated with three seals 105 applied thereto.
다음으로, 밸브부(200)는 도 4 및 도 6과 같이, 상기 몸체부(100) 내에 위치하여 길이방향을 따라 이동 가능한 구성으로, 이러한 밸브부(200) 또한 단일체나 조립체로 이루어질 수 있을 것이다.4 and 6, the valve unit 200 may be disposed within the body 100 and be movable along the longitudinal direction. The valve unit 200 may also be formed of a unitary body or an assembly .
이와 같은 밸브부(200)는 본 발명에 있어서 메인 밸브(210)와 밸브 샤프트(220)를 포함하는 조립체로 구성되는 것이 바람직하며, 상기 메인 밸브(210)와 상기 밸브 샤프트(220)는 상호 나사 결합 또는 압입 결합되어 서로 일체화될 수 있다.The main valve 210 and the valve shaft 220 are connected to each other by screws 211. The main valve 210 and the valve shaft 220 are connected to each other by a screw Or they can be integrated with each other.
특히, 상기 밸브부(200)의 메인 밸브(210) 및 밸브 샤프트(220)는 모두 중공체로 이루어져 있어 그 내부에 유로가 형성되어 냉매가 선택적으로 유통 가능한 것이다.Particularly, the main valve 210 and the valve shaft 220 of the valve unit 200 are both formed of hollow bodies, and a flow path is formed therein, so that the refrigerant can be selectively circulated.
이때 상기 메인 밸브(210)는 상술한 몸체부(100) 내부에 있어서 제1포트(101)와 제2포트(102) 간에 형성되어 있는 유로의 개도를 조절하는 기능을 수행한다.At this time, the main valve 210 functions to regulate the opening of the flow path formed between the first port 101 and the second port 102 in the body 100 described above.
예를 들어, 상기 메인 밸브(210)가 도 7에 있어서 좌측으로 전진할 경우 제1포트(101)와 제2포트(102) 간에 형성되어 있는 유로를 개방시키며, 도 8과 같이 도면상 우측으로 후퇴할 경우 이 유로를 폐쇄시키게 된다.For example, when the main valve 210 is advanced to the left in FIG. 7, the flow path formed between the first port 101 and the second port 102 is opened, If you retreat, you will close this channel.
물론, 상기 메인 밸브(210)는 유로의 완전 개방 상태와 완전 폐쇄 상태로만 절환되는 것은 아니며, 도 9에 예시한 바와 같이 개방 상태와 폐쇄 상태 사이에서 유로의 개도를 정밀하게 제어하는 역할을 하게 될 것이며, 이러한 개도의 정밀 제어는 이후에 설명할 압력 감응부(300)에 의해 수행될 수 있을 것이다.Of course, the main valve 210 is not only switched between a fully opened state and a fully closed state, but serves to precisely control the opening of the flow path between the opened state and the closed state as illustrated in FIG. 9 And precise control of this opening degree can be performed by the pressure-sensitive portion 300 to be described later.
이와 같은 압력 감응부(300)는 도 4 내지 도 6과 같이, 주변의 압력 변화에 따라 신축 가능한 압력감응부재(310)를 포함하는 것으로, 대략 상기 제3포트(103)가 형성되어 있는 상기 몸체부(100) 내에 위치하게 된다.4 to 6, the pressure sensing unit 300 includes a pressure sensitive member 310 that is stretchable and contractible in response to a change in peripheral pressure. The pressure sensing unit 300 includes a pressure sensing member 310, (100).
이에 따라, 상기 압력감응부재(310)는 상기 제3포트(103)의 냉매 압력, 즉 가변용량 압축기에 있어서 흡입실의 냉매 압력에 영향을 받게 되어 신축하게 됨으로써, 상술한 밸브부(200)의 정밀 제어를 실시할 수 있도록 하는 것이다.Accordingly, the pressure sensitive member 310 is affected by the refrigerant pressure of the third port 103, that is, the refrigerant pressure in the suction chamber of the variable capacity compressor, So that precise control can be performed.
예를 들어, 상기 압력감응부재(310)에 가해지는 냉매의 압력이 높은 경우 상기 압력감응부재(310)가 수축하게 되며, 냉매의 압력이 낮은 경우 상기 압력감응부재(310)가 신장하게 되는 것이다.For example, when the pressure of the refrigerant applied to the pressure sensitive member 310 is high, the pressure sensitive member 310 is contracted, and when the pressure of the refrigerant is low, the pressure sensitive member 310 is extended .
이와 같은 압력 감응부(300)에 있어서 압력감응부재(310)의 신축은 밸브부(200)의 위치 제어에 영향을 미치게 된다.In the pressure sensitive part 300, the expansion and contraction of the pressure sensitive member 310 affects the position control of the valve part 200.
다음으로, 구동부(400)는 도 1 내지 도 3 및 도 6과 같이, 코일과 플런저를 포함하는 주지의 솔레노이드 구동기구에 해당하는 것으로, 특히 본 발명에 있어서는 내경이 서로 다른 계단형태의 대경부분(411)과 소경부분(412)으로 이루어진 2단 코일(410)을 포함하고 있는 점에 특징이 있다.1 to 3 and 6, the driving unit 400 corresponds to a well-known solenoid driving mechanism including a coil and a plunger. Particularly, in the present invention, And a two-stage coil 410 made up of a small-diameter portion 411 and a small-diameter portion 412.
이때, 상기 2단 코일(410)은 원통형의 케이싱(440) 내에 마련될 수 있으며, 도면부호 401은 상기 구동부(400)의 외주면에 마련되는 씰링이다.At this time, the two-stage coil 410 may be provided in a cylindrical casing 440, and reference numeral 401 denotes a seal provided on an outer circumferential surface of the driving unit 400.
이러한 2단 코일(410)의 외주면은 전체 길이에 걸쳐 동일한 외경을 가지고 있지만, 그 내주면에는 소경부분(412)에 비해 내경이 큰 대경부분(411)이 2단 코일(410) 전체 길이에 대하여 대략 1/3 내지 1/2에 해당하는 길이로 형성되어 있다.The large-diameter portion 411 having an inner diameter larger than that of the small-diameter portion 412 is formed on the inner circumferential surface of the outer circumferential surface of the two-stage coil 410 about the entire length of the two- And is formed to have a length corresponding to 1/3 to 1/2.
이와 같은 2단 코일(410)은 상기 소경부분(412)과 상기 대경부분(411)의 권회수를 서로 다르게 함으로써 형성할 수 있는 것이다.The two-stage coil 410 can be formed by making the numbers of turns of the small-diameter portion 412 and the large-diameter portion 411 different from each other.
이에 따라, 상기 2단 코일(410)은 공급되는 전류량에 대응하는 자력을 형성하게 되며, 예를 들어, 높은 전류량이 인가되면 상대적으로 큰 자력을 형성하게 되고, 낮은 전류량이 인가되면 상대적으로 작은 자력을 형성하게 된다.For example, when a high current amount is applied, a relatively large magnetic force is formed. When a low amount of current is applied, a relatively small amount of magnetic force .
물론, 전류량이 인가되지 않으면 자력이 형성되지 않을 것이며, 이러한 2단 코일(410)에 공급되는 전류량은 차량의 공조 컨트롤러에 의해 능동 조절될 수 있을 것이다.Of course, if no current is applied, no magnetic force will be formed, and the amount of current supplied to the two-stage coil 410 may be actively controlled by the air conditioning controller of the vehicle.
이와 같이 2단 코일(410)에서 형성되는 자력에 따라 위치 이동하는 구성이 플런저(420)이며, 특히 본 발명에 있어서는 상기 플런저(420)의 일부만이 상기 2단 코일(410) 내에 삽입되도록 위치하는 것이다.In the present invention, only a part of the plunger 420 is positioned so as to be inserted into the two-stage coil 410. The plunger 420 is moved in accordance with the magnetic force of the two- will be.
즉, 상기 플런저(420)는 상술한 2단 코일(410) 내부에 완전히 수용되도록 위치하거나 혹은 상술한 2단 코일(410)의 완전히 바깥에 위치하지 않는다.That is, the plunger 420 is positioned so as to be completely accommodated in the two-stage coil 410 described above, or is not located completely out of the two-stage coil 410 described above.
여기에서, 플런저(420)가 2단 코일(410) 내부에 완전히 수용되도록 위치한다는 것은 상기 2단 코일(410)의 전체 길이 내에 상기 플런저(420)의 전체 길이가 모두 수용되도록 중첩되어 있는 상태를 의미하는 것이다.The reason that the plunger 420 is completely accommodated in the two-stage coil 410 is that the entire length of the two-stage coil 410 is overlapped to accommodate the entire length of the plunger 420 It means.
이와 같은 경우에는 밸브부(200)로부터 플런저(420) 사이의 거리가 상대적으로 너무 길어 부품간의 동심도 및 동축도를 정확하게 유지하기 어려워 부품 상호간의 간섭이나 작동 불량은 물론 진동 및 소음이 빈번하게 발생하는 원인이 된다.In such a case, since the distance between the valve unit 200 and the plunger 420 is relatively long, it is difficult to accurately maintain the concentricity and the coaxiality between the components, and vibration and noise are frequently generated It causes.
그리고, 플런저(420)가 2단 코일(410)의 완전히 바깥에 위치한다는 것은 2단 코일(410)의 전체 길이 내에 상기 플런저(420)의 전체 길이 중 어느 일부도 중첩되지 않도록 위치하는 상태를 의미하는 것이다.The fact that the plunger 420 is located completely out of the two-stage coil 410 means that the entire length of the two-stage coil 410 is positioned so that no part of the entire length of the plunger 420 overlaps .
이러한 경우에는 밸브부(200)로부터 플런저(420) 사이의 거리가 상대적으로 가까워져 부품간의 동심도나 동축도를 정확하게 유지하기에는 양호하지만, 플런저(420)가 코일로부터 너무 멀리 이격되어 있어 플런저(420)에 대하여 소망하는 수준의 높은 구동력을 얻기 어려운 것이다.In this case, the distance between the valve portion 200 and the plunger 420 is relatively close, which is good for accurately maintaining the concentricity or coaxiality between the components. However, the plunger 420 is too far away from the coil, It is difficult to obtain a high driving force at a desired level.
즉, 본 발명은 플런저(420)의 일부만이 2단 코일(410) 내에 위치하도록 함으로써, 부품간의 동심도 및 동축도를 정확하게 유지하면서도 소망하는 수준의 높은 플런저(420) 구동력을 얻을 수 있는 것이다.That is, according to the present invention, only a part of the plunger 420 is positioned in the two-stage coil 410, so that the desired driving force of the plunger 420 can be obtained while maintaining the concentricity and coaxiality between the components accurately.
이와 함께, 상기 플런저(420)의 도면상 좌측 말단은 상술한 밸브부(200)의 밸브 샤프트(220) 외주면에 연결되며, 도면상 우측 일부가 상기 2단 코일(410)의 대경부분(411) 내에 삽입될 수 있는 것이다.The left end of the plunger 420 is connected to the outer circumferential surface of the valve shaft 220 of the valve unit 200 and the right part of the plunger 420 is connected to the large diameter portion 411 of the two- As shown in FIG.
이에 따라, 도 6과 같이 상기 플런저(420)가 도면상 우측으로 최대 삽입될 수 있는 위치는 상기 2단 코일(410)에 형성되어 있는 대경부분(411)인 상기 2단 코일(410)의 전체 길이에 대하여 대략 1/3 내지 1/2에 해당할 것이다.6, the position where the plunger 420 can be fully inserted to the right in the drawing is a position where the entirety of the two-stage coil 410, which is the large-diameter portion 411 formed in the two-stage coil 410, About 1/3 to 1/2 of the length.
여기에서, 상기 2단 코일(410)과 상기 플런저(420) 사이에는 도 4 및 도 6과 같이 코일스프링(450)이 마련되어 상기 플런저(420)가 상기 2단 코일(410)로부터 도면상 좌측으로 이격되도록 탄성 지지된다.4 and 6, a coil spring 450 is provided between the two-stage coil 410 and the plunger 420 so that the plunger 420 moves from the two-stage coil 410 to the left side in the drawing And is elastically supported to be spaced apart.
이를 위해, 상기 플런저(420)의 외주면에는 상기 코일스프링(450)과 접촉하기 위한 별도의 단턱(421)이 돌출 형성될 수 있을 것이다.To this end, a separate step 421 for contacting the coil spring 450 may be formed on the outer circumferential surface of the plunger 420.
따라서, 상술한 2단 코일(410)에 전류량이 인가되지 않았을 경우 상기 코일스프링(450)에 의해 도 6에 있어서 좌측으로 플런저(420)가 전진하며, 상술한 2단 코일(410)에 전류량이 인가될 경우 상기 2단 코일(410)에 형성되는 자력에 의해 도 6에 있어서 우측으로 플런저(420)가 후퇴하게 되는 것이다.6, when the amount of current is not applied to the two-stage coil 410, the plunger 420 is advanced to the left side in FIG. 6 by the coil spring 450, The plunger 420 is retracted to the right side in Fig. 6 by the magnetic force formed in the two-stage coil 410. [
이때, 상기 플런저(420)의 좌측 말단에는 상술한 바와 같이 밸브 샤프트(220)가 서로 일체로 이동 가능하도록 연결되어 있어, 상기 플런저(420)의 이동에 따라 상기 밸브 샤프트(220)를 포함한 밸브부(200) 전체가 모두 함께 이동할 수 있는 것이다.The valve shaft 220 is connected to the left end of the plunger 420 such that the valve shaft 220 is integrally movable with respect to the valve shaft 220. As the plunger 420 moves, The entire body 200 can be moved together.
마지막으로, 본 발명에 있어서는 도 6 및 도 10과 같이 상기 몸체부(100)의 내주면과 상기 플런저(420)의 외주면 간에 상호 간극이 이격된 상태를 유지함으로써 자력의 영향을 감소시켜 마찰저항을 저감시키도록 개재되는 비자성재의 슬리브(500)를 포함하고 있다는 점에 또 하나의 특징이 있다.6 and 10, the inner circumferential surface of the body 100 and the outer circumferential surface of the plunger 420 are spaced apart from each other to reduce the influence of the magnetic force, thereby reducing the frictional resistance And a sleeve 500 of a non-magnetic material interposed therebetween.
여기에서, 상기 슬리브(500)는 대략 1mm 이하, 보다 바람직하게는 0.5mm 이하의 두께를 갖는 중공 파이프 형태로서 비자성재로 이루어져 있다.Here, the sleeve 500 is made of a non-magnetic material in the form of a hollow pipe having a thickness of about 1 mm or less, more preferably 0.5 mm or less.
이러한 슬리브(500)에 의해 상기 몸체부(100)의 내주면과 상기 플런저(420)의 외주면 간에 소정의 간극이 일정하게 유지된 상태로 유지될 수 있는 것이다.The gap between the inner circumferential surface of the body 100 and the outer circumferential surface of the plunger 420 can be maintained constant by the sleeve 500. [
게다가, 상술한 구동부(400)에서 형성된 자력을 플런저(420)가 위치하는 도면상 좌측을 향해 연장시키고자 상자성재로 이루어진 요크(120)를 몸체부(100)에 추가로 부가하는 경우에는, 몸체부(100)에 있어서 상자성재로 이루어진 요크(120)와 구동부(400)에 있어서 상자성재로 이루어진 플런저(420)의 사이에 비자성재로 이루어진 상기 슬리브(500)가 위치하게 되는 것이다.In addition, when the yoke 120 made of a paramagnetic material is further added to the body portion 100 to extend the magnetic force formed in the driving portion 400 toward the left side in the drawing where the plunger 420 is located, The sleeve 500 made of a nonmagnetic material is positioned between the yoke 120 made of a paramagnetic material and the plunger 420 made of a paramagnetic material in the driving part 400. [
이와 같이, 상자성재로 이루어진 플런저(420)와 요크(120) 사이에서 비자성재로 이루어진 슬리브(500)가 위치함으로써, 상기 플런저(420)와 상기 요크(120) 상호간에 작용하는 습동저항을 저감시키는 역할을 효과적으로 하게 되는 것이다.The sliding resistance between the plunger 420 and the yoke 120 is reduced by locating the sleeve 500 made of non-magnetic material between the plunger 420 and the yoke 120, The role is to be effective.
그 결과, 상기 슬리브(500)에 의해 플런저(420)와 요크(120) 사이에 작용하는 자력의 영향을 저감시킴으로써 플런저(420)의 외주면과 요크(120)의 내주면 사이에 형성되는 습동부분에 대하여 마찰 저항을 크게 저감시키고, 플런저(420)의 구동력이 저하되는 현상을 효과적으로 예방할 수도 있게 되는 것이다.As a result, by reducing the influence of the magnetic force acting between the plunger 420 and the yoke 120 by the sleeve 500, the sliding portion formed between the outer peripheral surface of the plunger 420 and the inner peripheral surface of the yoke 120 The frictional resistance can be greatly reduced and the driving force of the plunger 420 can be effectively prevented from being lowered.
본 출원인은 상기 슬리브(500)의 두께를 증감시키면서 플런저(420)와 요크(120) 사이에서 발생하는 습동저항을 측정해 본 결과, 상기 슬리브(500)의 두께 0.1mm 변화에도 습동저항에 큰 영향을 미치는 것을 확인하였다.The present applicant has measured the sliding resistance generated between the plunger 420 and the yoke 120 while increasing or decreasing the thickness of the sleeve 500. As a result, even when the thickness of the sleeve 500 is 0.1 mm, Respectively.
이러한 시험 결과에 따르면, 상술한 슬리브(500)의 두께를 적절하게 변경하는 것에 의해, 기본적으로 플런저(420)의 구동력을 저하시키지 않으면서도, 플런저(420)와 요크(120) 사이의 습동저항을 적절하게 저감시키는 것이 가능해진다.According to the test results, the sliding resistance between the plunger 420 and the yoke 120 can be improved by appropriately changing the thickness of the sleeve 500 without reducing the driving force of the plunger 420 It is possible to appropriately reduce it.
상술한 바와 같이 구동부(400)의 자력을 연장하기 위하여, 본 발명에 있어서 상기 몸체부(100)는, 상기 제1포트(101) 및 상기 제2포트(102)가 형성되는 메인 몸체(110)와 상기 제3포트(103)가 형성되되 상자성재로 이루어진 요크(120)를 포함하며; 상기 슬리브(500)는 상기 요크(120)의 내주면과 상기 플런저(420)의 외주면 사이에 개재되는 것이 바람직할 것이다.In order to extend the magnetic force of the driving unit 400 as described above, the body 100 of the present invention includes a main body 110 having the first port 101 and the second port 102 formed therein, And a yoke (120) having the third port (103) and made of a paramagnetic material; Preferably, the sleeve 500 is interposed between the inner circumferential surface of the yoke 120 and the outer circumferential surface of the plunger 420.
이는 몸체부(100)에 있어서 요크(120)만을 국부적으로 몸체부(100)와는 다른 재질의 상자성재로 적용하기 위함이며, 이에 따라, 메인 몸체(110)에는 상술한 제1포트(101)와 제2포트(102)가 형성될 것이며, 상기 요크(120)에는 상술한 제3포트(103)가 형성될 수 있을 것이다.This is because only the yoke 120 is locally applied to the body portion 100 as a box material having a material different from that of the body portion 100. Accordingly, A second port 102 may be formed, and the third port 103 may be formed in the yoke 120.
또한, 본 발명에 있어서 상기 압력 감응부(300)는, 도 5 및 도 6과 같이 내부에 탄성체(311)를 구비한 압력감응부재(310)인 벨로우즈를 포함하여 상기 플런저(420) 내에 위치하며, 일측은 상기 2단 코일(410)의 내측에 위치하는 코어(430)에 고정되고, 타측은 상기 벨로우즈의 신축에 따라 상기 밸브부(200)와 선택적으로 접촉하는 것이 바람직할 것이다.5 and 6, the pressure sensitive part 300 includes a bellows which is a pressure sensitive member 310 having an elastic body 311 therein, and is disposed in the plunger 420 Stage coil 410. The other side of the core 430 may be selectively in contact with the valve 200 according to the elongation and contraction of the bellows.
즉, 상기 압력 감응부(300)의 압력감응부재(310)인 벨로우즈의 양단에는 제1지지부재(312) 및 제2지지부재(313)가 마련되며 그 내부에는 탄력적으로 신장하도록 탄성체(311)를 구비하고 있다.That is, the first and second support members 312 and 313 are provided at both ends of the bellows, which is the pressure sensitive member 310 of the pressure sensitive part 300, and an elastic body 311 is provided so as to be elastically stretched in the bellows. .
이에 따라, 상기 압력감응부재(310)에 작용하는 냉매의 압력이 낮을 경우 상기 탄성체(311)에 의하여 탄력적으로 신장하도록 하고, 반대로 상기 압력감응부재(310)에 작용하는 냉매의 압력이 높을 경우에는 단축되도록 하는 것이다.Accordingly, when the pressure of the refrigerant acting on the pressure sensitive member 310 is low, the elastic body 311 elastically extends the pressure of the refrigerant. When the pressure of the refrigerant acting on the pressure sensitive member 310 is high, .
이와 같은 압력 감응부(300)는 상술한 플런저(420) 내에 배치되는 것이 바람직할 것이며, 이에 따라, 상기 플런저(420)는 상기 압력 감응부(300)를 수용할 수 있도록 하우징 형상으로 이루어질 수 있다.The pressure sensing part 300 may be disposed within the plunger 420 so that the plunger 420 may be formed in a housing shape to accommodate the pressure sensing part 300 .
그리고, 이 플런저(420)의 둘레면에는 통공(422)이 형성되어 상기 플런저(420)의 내부로 제3포트(103)의 냉매 압력이 상술한 압력 감응부(300)에도 원활하게 작용하도록 하는 것이 양호할 것이다.A through hole 422 is formed in the circumferential surface of the plunger 420 so that the refrigerant pressure of the third port 103 is smoothly applied to the pressure sensing part 300 through the plunger 420 Will be good.
그리고, 이러한 압력 감응부(300)의 도면상 우측은 제2지지부재(313)에 조절나사(320)가 연결되며, 이 조절나사(320)는 상술한 2단 코일(410)의 내측에 위치하는 코어(430) 내에 위치하게 된다.An adjustment screw 320 is connected to the second support member 313 on the right side of the pressure sensitive part 300. The adjustment screw 320 is positioned inside the above- Lt; RTI ID = 0.0 > 430 < / RTI >
여기에서, 도면부호 301은 상기 조절나사(320)의 외주면에 마련되는 씰링(301)이다.Here, reference numeral 301 denotes a sealing ring 301 provided on the outer peripheral surface of the adjusting screw 320.
이때, 상기 코어(430)는 중공체로 이루어져 있어 이 코어(430)의 내주면에 도 6과 같이 상기 조절나사(320)가 고정 체결되며, 이 조절나사(320)를 돌려 체결 위치를 변경시킴으로써 상술한 압력감응부재(310)의 지지 위치를 미세하게 조절하는 것도 가능할 것이다.6, the adjusting screw 320 is fixed to the inner circumferential surface of the core 430, and the adjusting screw 320 is rotated to change the engaging position. As a result, It is also possible to finely adjust the support position of the pressure sensitive member 310. [
또한, 상기 압력 감응부(300)의 도면상 좌측에 마련되는 제1지지부재(312)는 상기 압력감응부재(310)인 벨로우즈의 신축에 따라 상기 밸브부(200)와 선택적으로 접촉하게 될 것이다.The first support member 312 provided on the left side of the pressure sensitive portion 300 may be selectively brought into contact with the valve portion 200 according to the expansion and contraction of the bellows as the pressure sensitive member 310 .
이에 따라, 상기 밸브부(200)에는 기본적으로 탄성체(311), 플런저(420), 그리고 압력 감응부(300)의 힘이 복합적으로 작용하게 됨으로써, 상기 밸브부(200)가 냉매 유로를 상황에 따라 적절하게 제어하는 것이 가능해진다.Accordingly, the valve unit 200 basically acts on the elastic body 311, the plunger 420, and the pressure sensitive part 300 in a complex manner, It becomes possible to appropriately control it.
그리고, 본 발명에 있어서 상기 슬리브(500)는 상기 코어(430)에 지지되어 위치 고정되는 것이 바람직할 것이다.In the present invention, it is preferable that the sleeve 500 is supported by the core 430 and fixed in position.
즉, 상술한 슬리브(500)는 도 4와 같이 플런저(420)의 외주면과 몸체부(100)의 요크(120) 내주면 사이에 위치하되, 상기 슬리브(500)를 상기 코어(430)에 일체로 연결하고, 다시 상기 슬리브(500)에 상기 요크(120)를 일체로 연결함으로써, 조립 부품의 수를 저감시키는 것이 가능해진다.4, the sleeve 500 is positioned between the outer circumferential surface of the plunger 420 and the inner circumferential surface of the yoke 120 of the body 100, and the sleeve 500 is integrally formed with the core 430 And the yoke 120 is integrally connected to the sleeve 500, it is possible to reduce the number of assembled parts.
게다가, 단순히 상기 슬리브(500)를 소정의 위치에 개재시키는 것에 그치지 않고 위치 고정시킴에 따라 상기 슬리브(500)가 조립 공차 등으로 인해 미세하게 유동하는 것도 방지할 수 있게 된다.In addition, it is possible to prevent the sleeve 500 from flowing finely due to an assembly tolerance or the like by simply fixing the position of the sleeve 500 not to interpose the sleeve 500 at a predetermined position.
마지막으로, 본 발명에 있어서 상기 밸브부(200)에는 상기 제1포트(101)와 상기 제3포트(103)를 연통시키는 바이패스 통로(221)가 추가 형성되어, 상기 밸브부(200)의 진퇴 시에 밸브시트(130)와의 간극이 변화하면서 가변 오리피스 기능을 수행하는 것이 바람직할 것이다.A bypass passage 221 for connecting the first port 101 and the third port 103 is additionally formed in the valve portion 200 of the valve 200, It is preferable to perform the variable orifice function while the clearance with the valve seat 130 changes during forward and backward movement.
일반적인 종래의 가변용량 압축기에 있어서는, 압축기의 효과적인 제어를 목적으로 크랭크실의 냉매를 흡입실로 직접 배출시키기 위하여 가변용량 압축기의 몸체 내부 또는 외부에 별도의 오리피스를 마련하고 있었다.In a conventional conventional variable capacity compressor, a separate orifice is provided inside or outside the body of the variable capacity compressor in order to directly discharge the refrigerant in the crankcase into the suction chamber for the purpose of effective control of the compressor.
하지만, 이러한 오리피스는 개도 조절이 별도로 이루어지지 않고 일정한 직경을 가진 고정 오리피스 형태이기 때문에 오히려 이러한 고정 오리피스에 의해 불필요한 경우에도 크랭크실의 냉매가 흡입실로 배출되어 가변용량 압축기의 압축 효율이 크게 저하된다는 문제점을 가지고 있었다.However, since the opening orifice is not provided separately and has a fixed orifice shape having a constant diameter, the compression efficiency of the variable capacity compressor is greatly reduced due to the discharge of the refrigerant in the crankcase to the suction chamber even when the fixed orifice is not required. .
이에 대응하여, 본 발명에 있어서는 밸브부(200)에 있어서 메인 밸브(210)와 밸브 샤프트(220)를 모두 중공체로 형성하고, 제1포트(101)와 제3포트(103)를 연통시킬 수 있도록 바이패스 통로(221)를 상기 밸브부(200)에 추가 형성하는 것에 추가적인 특징이 있다.Correspondingly, in the present invention, both the main valve 210 and the valve shaft 220 are formed as a hollow body in the valve unit 200, and the first port 101 and the third port 103 can communicate with each other The bypass passage 221 is formed in the valve portion 200 so that the bypass passage 221 is formed.
특히, 상기 바이패스 통로(221)는 상기 밸브부(200)에 있어서 도 6에 예시한 바와 같이 밸브 샤프트(220)에 추가 형성되어 밸브부(200)의 내부와 제3포트(103)를 연통시킬 수 있는 것이 바람직할 것이다.6, the bypass passage 221 is further formed in the valve shaft 220 as shown in FIG. 6 so that the inside of the valve portion 200 and the third port 103 are communicated with each other It would be desirable to be able to do so.
이에 따라, 본 발명에 있어서 제1포트(101), 밸브시트(130)와 메인 밸브(210), 밸브 샤프트(220)의 바이패스 통로(221), 그리고 제3포트(103)로 이루어지는 가변 오리피스를 구성하는 것이 가능하다. Thus, in the present invention, the variable orifice composed of the first port 101, the valve seat 130 and the main valve 210, the bypass passage 221 of the valve shaft 220, and the third port 103 As shown in FIG.
이와 같이 구성되는 가변 오리피스는 상기 밸브부(200)의 진퇴 시에 상기 밸브부(200)와 밸브시트(130) 사이의 간극이 스스로 조절됨으로써 크랭크실의 냉매를 흡입실로 적절하게 배출시키는 수행하게 된다.The variable orifice configured as described above is adapted to automatically discharge the refrigerant in the crank chamber to the suction chamber by adjusting the clearance between the valve portion 200 and the valve seat 130 when the valve portion 200 moves back and forth .
예를 들어, 도 7과 같이 밸브부(200)의 메인 밸브(210)가 밸브시트(130)에 완전히 밀착되었을 때에는 가변 오리피스가 폐쇄되며, 도 8과 같이 메인 밸브(210)가 밸브시트(130)로부터 이격되면 가변 오리피스가 개방된다.7, when the main valve 210 of the valve unit 200 is completely in close contact with the valve seat 130, the variable orifice is closed, and the main valve 210 is closed by the valve seat 130 , The variable orifice is opened.
이에 그치지 않고, 도 9에 예시한 바와 같이 압력 감응부(300)에 의한 밸브부(200)의 진퇴 시에도 메인 밸브(210)와 밸브시트(130) 사이의 개도를 적절하게 조절하는 역할을 하게 되는 것이다.9, the opening degree between the main valve 210 and the valve seat 130 is appropriately adjusted even when the valve portion 200 moves forward and backward by the pressure sensitive portion 300 .
결과적으로 본 발명에 있어서는 가변용량 압축기용 제어밸브 내에 가변 오리피스를 적용함으로써 기존의 고정 오리피스를 배제시키면서도 가변용량 압축기에 대한 압축 효율을 크게 향상시킬 수 있게 된다.As a result, in the present invention, by applying the variable orifice to the control valve for the variable displacement compressor, it is possible to greatly improve the compression efficiency of the variable displacement compressor while eliminating the existing fixed orifice.
이하, 도면을 참조하여 본 발명의 작용을 설명하면 다음과 같다.Hereinafter, the operation of the present invention will be described with reference to the drawings.
상기와 같이 구성된 본 발명의 가변용량 압축기용 제어밸브는 구동부(400)에 전원이 인가되지 않는 경우, 구동부(400)에 전류량이 100% 인가되는 경우, 그리고 구동부(400)에 전류량이 적절하게 조절되어 인가되는 경우로 구분될 수 있으며, 이하에서는 각각의 경우를 구분하여 설명하기로 한다.In the control valve for a variable capacity compressor of the present invention having the above-described structure, when no power is applied to the driving unit 400, when the amount of current is 100% applied to the driving unit 400, , And each case will be separately described below.
<구동부(400)에 전원이 인가되지 않는 경우>&Lt; No power is applied to the driving unit 400 >
본 발명의 가변용량 압축기용 제어밸브에 전원이 인가되지 않는 경우에는 상기 구동부(400)의 동작이 없으며, 단지 코일스프링(450)의 탄성력에 의해 플런저(420)가 도면상 좌측으로 이동하게 된다.When the power is not applied to the control valve for the variable capacity compressor of the present invention, the driving unit 400 does not operate, and the plunger 420 moves to the left side in the drawing by the elastic force of the coil spring 450 only.
이에 따라, 상기 플런저(420)에 연결되어 있는 밸브 샤프트(220)를 통해 메인 밸브(210)를 포함한 밸브부(200) 전체가 도면상 좌측으로 이동하게 된다.Accordingly, the entire valve unit 200 including the main valve 210 moves to the left through the valve shaft 220 connected to the plunger 420.
그 결과, 메인 밸브(210)는 도 7과 같이 몸체부(100) 내에 형성된 제1포트(101)와 제2포트(102) 사이의 유로를 개방시킴으로써, 가변용량 압축기의 토출실로부터 크랭크실로 실선의 화살표로 표시한 바와 같이 냉매가 흐르게 되며, 이러한 경우, 가변 오리피스는 폐쇄된다.As a result, the main valve 210 opens the flow path between the first port 101 and the second port 102 formed in the body portion 100 as shown in Fig. 7, thereby opening the flow path from the discharge chamber of the variable capacity compressor to the crank chamber, The refrigerant flows as indicated by arrows in Fig. 4A. In this case, the variable orifice is closed.
결과적으로, 가변용량 압축기에 있어서 크랭크실의 냉매 압력이 상승함에 따라 사판의 경사각을 최대한 작게 제어함으로써, 상기 가변용량 압축기에서 토출되는 냉매의 양을 최소화하며, 가변 오리피스가 폐쇄되어 크랭크실로부터 흡입실로의 냉매 배출은 발생치 않는다.As a result, the amount of refrigerant discharged from the variable displacement compressor is minimized by controlling the inclination angle of the swash plate to be as small as possible as the refrigerant pressure in the crank chamber rises in the variable displacement compressor, and the variable orifice is closed, The refrigerant is not discharged.
<구동부(400)에 전류량이 100% 인가되는 경우>&Lt; Case in which the amount of current is applied to the driving part 400 by 100%
본 발명의 가변용량 압축기용 제어밸브에 전원이 100% 인가되는 경우에는 상기 구동부(400)에 100%의 전류량이 공급되며, 이때, 상기 플런저(420)의 구동력은 코일스프링(450)의 탄성적인 신장력보다 크기 때문에, 플런저(420)가 도면상 우측으로 최대 이동하게 된다.When 100% power is applied to the control valve for the variable capacity compressor according to the present invention, a driving current of 100% is supplied to the driving unit 400. At this time, the driving force of the plunger 420 is transmitted to the driving unit 400, The plunger 420 is maximally moved to the right side in the drawing.
이에 따라, 상기 플런저(420)에 연결되어 있는 밸브 샤프트(220)를 통해 메인 밸브(210)를 포함한 밸브부(200) 전체가 도면상 우측으로 이동하게 된다.Accordingly, the entire valve unit 200 including the main valve 210 moves to the right through the valve shaft 220 connected to the plunger 420.
그 결과, 메인 밸브(210)는 도 8에 도시한 바와 같이 몸체부(100) 내에 형성된 제1포트(101)와 제2포트(102) 사이의 유로를 폐쇄시킴으로써, 가변용량 압축기의 토출실로부터 크랭크실로 냉매의 흐름이 없게 되며, 이러한 경우, 가변 오리피스는 최대로 개방된다.As a result, the main valve 210 closes the flow path between the first port 101 and the second port 102 formed in the body portion 100 as shown in FIG. 8, There is no flow of coolant through the crankcase, and in this case, the variable orifice is opened to the maximum.
결과적으로, 가변용량 압축기에 있어서 크랭크실의 냉매 압력이 하강함에 따라 사판의 경사각을 최대한 크게 제어함으로써, 상기 가변용량 압축기에서 토출되는 냉매의 양을 최대로 하게 되며, 특히 가변 오리피스에 의해 크랭크실의 냉매가 흡입실로 신속하게 배출되어 압축 효율을 효과적으로 증대시키게 된다.As a result, the amount of refrigerant discharged from the variable displacement compressor is maximized by controlling the inclination angle of the swash plate as large as possible as the refrigerant pressure in the crank chamber decreases in the variable displacement compressor. In particular, The refrigerant is quickly discharged to the suction chamber, effectively increasing the compression efficiency.
<구동부(400)에 전류량이 적절하게 조절되어 인가되는 경우>&Lt; Case where the amount of current is appropriately adjusted and applied to the driving unit 400 >
본 발명의 가변용량 압축기용 제어밸브에 전원이 적절하게 조절되어 인가되는 경우에는 상기 구동부(400)에 적절하게 제어된 전류량이 공급되며, 이러한 경우, 제3포트(103)에 작용하는 가변용량 압축기의 크랭크실 냉매 압력이 압력 감응부(300)에 작용하게 된다.In the case where the control valve for the variable capacity compressor of the present invention is appropriately regulated and supplied with power, a proper amount of current is supplied to the driving unit 400. In this case, The pressure of the refrigerant in the crankcase is applied to the pressure sensing part 300.
이때, 상기 플런저(420)의 구동력 및 코일스프링(450)의 탄력적인 신장력과 함께, 상기 압력 감응부(300)에 있어서 압력감응부재(310)에 작용하는 냉매 압력에 따라 신축하려는 힘이 더하여져 상기 플런저(420)가 도면상 좌측 또는 우측으로 번갈아 가면서 이동하게 된다.At this time, along with the driving force of the plunger 420 and the elastic extension force of the coil spring 450, a force to expand and contract according to the refrigerant pressure acting on the pressure sensitive member 310 in the pressure sensitive portion 300 is added The plunger 420 moves alternately from left to right in the drawing.
이에 따라, 상기 플런저(420)에 연결되어 있는 밸브 샤프트(220)를 통해 메인 밸브(210)를 포함한 밸브부(200) 전체가 도면상 좌측 또는 우측으로 흡입실의 냉매 압력 변화에 따라 이동하게 되는 것이다.The entire valve portion 200 including the main valve 210 moves through the valve shaft 220 connected to the plunger 420 in accordance with the refrigerant pressure change in the suction chamber to the left or right in the drawing will be.
그 결과, 메인 밸브(210)는 몸체부(100) 내에 형성된 제1포트(101)와 제2포트(102) 사이의 유로 개도를 도 9와 같이 적절하게 조절함으로써, 결과적으로, 가변용량 압축기에 있어서 크랭크실의 냉매 압력이 상승하거나 하강하는 것을 반복하면서 사판의 경사각을 적절하게 크거나 작게 제어함으로써, 상기 가변용량 압축기에서 토출되는 냉매의 양을 최적화 하게 된다.As a result, the main valve 210 appropriately adjusts the opening degree of the flow path between the first port 101 and the second port 102 formed in the body portion 100 as shown in FIG. 9, So that the amount of refrigerant discharged from the variable displacement compressor is optimized by controlling the slope angle of the swash plate to be suitably large or small while repeatedly raising or lowering the refrigerant pressure in the crank chamber.
이와 동시에, 가변 오리피스 또한 메인 밸브(210)와 밸브시트(130) 사이의 개도를 상기 밸브부(200)의 이동에 따라 적절하게 조절하게 됨으로써, 결과적으로는 가변용량 압축기의 압축 효율을 향상시키는 데 일조하게 되는 것이다.At the same time, the variable orifice also appropriately adjusts the opening degree between the main valve 210 and the valve seat 130 in accordance with the movement of the valve unit 200, thereby improving the compression efficiency of the variable capacity compressor It will help.
따라서, 본 발명에서는 상술한 바와 같은 기본적인 동작을 수행하는 가변용량 압축기용 제어밸브에 있어서, 도 6과 같이 플런저(420)의 일부만이 2단 코일(410) 내에 위치하기 때문에, 플런저(420)로부터 밸브부(200) 사이의 거리가 상대적으로 짧아 부품간의 동심도 및 동축도를 정확하게 유지하면서도 소망하는 수준의 높은 플런저(420) 구동력을 얻을 수 있는 것이다.Accordingly, in the present invention, in the control valve for variable capacity compressors performing the basic operation as described above, since only a part of the plunger 420 is located in the two-stage coil 410 as shown in FIG. 6, The distance between the valve portions 200 is relatively short so that the desired driving force of the plunger 420 can be obtained while maintaining the concentricity and the coaxiality between the components accurately.
게다가, 본 발명에서는 상자성재로 이루어진 요크(120)를 부가하여 플런저(420)의 일부만이 2단 코일(410) 내에 위치하더라도 높은 구동력을 얻을 수 있으면서도, 도 10과 같이 몸체부(100)에 있어서 상자성재로 이루어진 요크(120)와 구동부(400)에 있어서 상자성재로 이루어진 플런저(420)의 사이에 비자성재로 이루어진 상기 슬리브(500)가 위치하게 됨으로써, 상기 플런저(420)와 상기 요크(120) 상호간에 작용하는 습동저항을 효과적으로 저감시키는 역할을 하게 되는 것이다.In addition, in the present invention, it is possible to obtain a high driving force even if only a part of the plunger 420 is placed in the two-stage coil 410 by adding the yoke 120 made of the paramagnetic material, The sleeve 500 made of a non-magnetic material is positioned between the yoke 120 made of a box-like material and the plunger 420 made of a box-like material in the driving unit 400, so that the plunger 420 and the yoke 120 Thereby effectively reducing the sliding resistance acting on each other.
이에 따라, 상기 슬리브(500)에 의해 플런저(420)와 요크(120) 사이에 작용하는 자력의 영향을 저감시키는 한편, 플런저(420)의 외주면과 요크(120)의 내주면 사이에 형성되는 습동부분에 대하여 마찰 저항을 크게 저감시킴으로써, 상술한 플런저(420)의 구동력이 저감되는 것을 효과적으로 방지할 수 있다는 탁월한 이점을 지닌 발명인 것이다.The sliding portion 500 reduces the influence of the magnetic force acting between the plunger 420 and the yoke 120 and reduces the influence of the magnetic force acting between the plunger 420 and the inner peripheral surface of the yoke 120, It is possible to effectively prevent the driving force of the plunger 420 from being reduced by effectively reducing the frictional resistance of the plunger 420. [
추가적으로는 가변용량 압축기용 제어밸브 내에 가변 오리피스를 일체로 구성하여 필요에 따라 크랭크실의 냉매를 흡입실로 신속하게 배출시키는 것이 가능하여 압축 효율을 효과적으로 증대시킨다는 이점 또한 가지게 된다.In addition, the variable orifice is integrally formed in the control valve for the variable displacement compressor, so that the refrigerant in the crank chamber can be quickly discharged to the suction chamber as required, thereby effectively increasing the compression efficiency.
상기 실시예는 본 발명의 기술적 사상을 구체적으로 설명하기 위한 일례로서, 본 발명의 범위는 상기의 도면이나 실시예에 한정되지 않는다.The above embodiment is an example for explaining the technical idea of the present invention specifically, and the scope of the present invention is not limited to the above-mentioned drawings or embodiments.
이상과 같은 본 발명은 가변용량 압축기용 제어밸브에 플런저의 일부를 수용하여 구동시키는 2단 코일을 적용하여 부품간의 동심도 및 동축도를 높임으로써 중심이 틀어져 발생할 수 있는 간섭을 미연에 예방할 수 있으며, 구동력을 증대시킴으로써 정확도 높게 밸브 제어를 수행하고, 특히 습동부분에 비자성재의 슬리브를 부가하여 자력에 의한 영향을 감소시키는 한편 습동저항을 저감시킴으로써 밸브의 보다 원활한 동작이 이루어질 수 있음으로써, 제품의 신뢰도 및 상품성을 증대시키면서 시장경쟁력을 극대화시킬 수 있는 발명인 것이다.As described above, the present invention can prevent the interference that may occur due to the turning of the center by increasing the concentricity and the coaxiality between the components by applying a two-stage coil for receiving and driving a part of the plunger in the control valve for the variable capacity compressor, By increasing the driving force, the valve control is performed with high accuracy. Particularly, by adding the non-magnetic material sleeve to the sliding portion, the influence by the magnetic force is reduced and the sliding resistance is reduced. And to maximize market competitiveness while increasing commerciality.

Claims (5)

  1. 크랭크실, 토출실, 그리고 흡입실이 형성되고 상기 크랭크실 내에 사판을 구비한 가변용량 압축기에 접속되어 냉매의 유로 절환을 통해 상기 사판의 경사각을 제어하는 제어밸브에 있어서;A control valve connected to a variable capacity compressor having a crank chamber, a discharge chamber, and a suction chamber and having a swash plate in the crank chamber, for controlling the inclination angle of the swash plate through switching of a flow path of the refrigerant;
    상기 크랭크실, 상기 토출실, 그리고 상기 흡입실에 각각 연통되는 제1포트, 제2포트, 그리고 제3포트가 형성되는 중공의 몸체부와;A hollow body portion having a first port, a second port, and a third port communicating with the crank chamber, the discharge chamber, and the suction chamber, respectively;
    상기 몸체부 내에서 길이방향을 따라 이동 가능하도록 위치하여 상기 제1포트와 상기 제2포트 간에 형성된 유로의 개도를 조절 가능한 메인 밸브를 포함하는 밸브부와;And a main valve positioned to be movable along the longitudinal direction in the body portion and capable of adjusting an opening degree of a flow path formed between the first port and the second port;
    상기 제3포트의 압력 변화에 따라 신축 가능한 압력감응부재를 포함하여 상기 밸브부의 위치를 보정하는 압력 감응부와;A pressure sensitive part including a pressure sensitive member that is expandable and contractible in accordance with a pressure change of the third port to correct a position of the valve part;
    내경이 서로 다른 계단형태의 대경부분과 소경부분으로 이루어지며 공급되는 전류량에 대응하는 자력을 형성하는 2단 코일과, 일측 말단이 상기 밸브부에 연결되며 타측 일부가 상기 2단 코일의 대경부분 내에 삽입되어 진퇴 가능한 플런저를 포함하는 구동부와;Stage coil having a large-diameter portion and a small-diameter portion with different inner diameters and forming a magnetic force corresponding to the amount of supplied current, and a two-stage coil having one end connected to the valve portion and the other portion connected to the large- A driving unit including a plunger that is inserted and retractable;
    상기 몸체부의 내주면과 상기 플런저의 외주면 간에 상호 간극이 이격된 상태를 유지함으로써 자력의 영향을 감소시켜 마찰저항을 저감시키도록 개재되는 비자성재의 슬리브를 포함하는 것을 특징으로 하는 가변용량 압축기용 제어밸브.And a sleeve of a non-magnetic material which is interposed between the inner circumferential surface of the body portion and the outer circumferential surface of the plunger so as to reduce the influence of the magnetic force to reduce frictional resistance by maintaining a state in which mutually- .
  2. 제1항에 있어서, 상기 몸체부는, 상기 제1포트 및 상기 제2포트가 형성되는 메인 몸체와 상기 제3포트가 형성되되 상자성재로 이루어진 요크를 포함하며;[3] The apparatus of claim 1, wherein the body includes a main body having the first port and the second port formed therein, and a yoke made of a paramagnetic material in which the third port is formed;
    상기 슬리브는 상기 요크의 내주면과 상기 플런저의 외주면 사이에 개재되는 것을 특징으로 하는 가변용량 압축기용 제어밸브.Wherein the sleeve is interposed between an inner peripheral surface of the yoke and an outer peripheral surface of the plunger.
  3. 제2항에 있어서, 상기 압력 감응부는, 내부에 탄성체를 구비한 압력감응부재인 벨로우즈를 포함하여 상기 플런저 내에 위치하며, 일측은 상기 2단 코일의 내측에 위치하는 코어에 고정되고, 타측은 상기 벨로우즈의 신축에 따라 상기 밸브부와 선택적으로 접촉하는 것을 특징으로 하는 가변용량 압축기용 제어밸브.The pressure sensor according to claim 2, wherein the pressure sensitive part includes a bellows, which is a pressure sensitive member having an elastic body therein, and is located in the plunger, one side of which is fixed to a core located on the inner side of the two- And selectively contacts the valve portion according to expansion and contraction of the bellows.
  4. 제3항에 있어서, 상기 슬리브는 상기 코어에 지지되어 위치 고정되는 것을 특징으로 하는 가변용량 압축기용 제어밸브.The control valve for a variable capacity compressor according to claim 3, wherein the sleeve is supported and fixed in the core.
  5. 제4항에 있어서, 상기 밸브부에는 상기 제1포트와 상기 제3포트를 연통시키는 바이패스 통로가 추가 형성되어, 상기 밸브부의 진퇴 시에 밸브시트와의 간극이 변화하면서 가변 오리피스 기능을 수행하는 것을 특징으로 하는 가변용량 압축기용 제어밸브.[5] The apparatus of claim 4, wherein the valve unit further includes a bypass passage communicating the first port and the third port to perform a variable orifice function while changing a clearance between the valve seat and the valve seat when the valve unit moves back and forth And a control valve for a variable capacity compressor.
PCT/KR2018/014242 2017-11-20 2018-11-20 Control valve for variable-capacity compressor WO2019098804A1 (en)

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