KR20170029045A - Check valve of variable capacity compressor vehicle - Google Patents

Check valve of variable capacity compressor vehicle Download PDF

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Publication number
KR20170029045A
KR20170029045A KR1020150125304A KR20150125304A KR20170029045A KR 20170029045 A KR20170029045 A KR 20170029045A KR 1020150125304 A KR1020150125304 A KR 1020150125304A KR 20150125304 A KR20150125304 A KR 20150125304A KR 20170029045 A KR20170029045 A KR 20170029045A
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KR
South Korea
Prior art keywords
valve
refrigerant
spool
spool valve
valve seat
Prior art date
Application number
KR1020150125304A
Other languages
Korean (ko)
Inventor
김기연
Original Assignee
주식회사 지에이티
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 지에이티 filed Critical 주식회사 지에이티
Priority to KR1020150125304A priority Critical patent/KR20170029045A/en
Publication of KR20170029045A publication Critical patent/KR20170029045A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • 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
    • F04B27/0804—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 having rotary cylinder block
    • F04B27/0821—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 having rotary cylinder block component parts, details, e.g. valves, sealings, lubrication
    • F04B27/086—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 having rotary cylinder block component parts, details, e.g. valves, sealings, lubrication swash plate
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001—Noise damping
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/021—Check valves with guided rigid valve members the valve member being a movable body around which the medium flows when the valve is open
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/06—Valve parameters
    • F04B2201/0604—Valve noise

Abstract

The present invention discloses a check valve of a variable-capacity compressor for a vehicle and, more specifically, is constructed to have a higher height of a front side than a rear side of a valve seat. As such, a spool valve mounted on the valve seat is installed to be inclined inside a valve housing, such that initial opening of the spool valve is performed by a minimal contact to the valve housing in a state where the spool valve is inclined, thus preventing a valve noise generated between a valve case and the spool valve, and also effectively restraining an initial shaking phenomenon while a passage is opened quickly, when a refrigerant starts to flow in after the initial opening of the spool valve.

Description

[0001] The present invention relates to a check valve of a variable capacity compressor for a vehicle,

The present invention relates to a check valve used in a variable capacity compressor for a vehicle, and more particularly, to a check valve used for a variable capacity compressor for a vehicle. More specifically, the valve seat has a front side higher in height than a rear side, And the minimum opening is made in a state where the initial opening of the spool valve is inclined by the minimum contact so that the valve noise generated between the valve case and the spool valve is prevented. In addition, when the refrigerant is introduced from the initial opening of the spool valve, The present invention relates to a check valve for a variable capacity compressor for a vehicle,

2. Description of the Related Art Generally, a compressor for a vehicle air conditioner is a device that selectively receives power from a power source by an intermittent action of a clutch, sucks refrigerant gas from the evaporator, compresses the refrigerant gas by linear reciprocating motion of the piston,

Such a compressor is widely applied as a variable displacement compressor type in which a discharge capacity is varied by controlling the inclination angle of a swash plate.

A general variable capacity swash plate type compressor 1 is provided with a plurality of cylinder bores 112 and a suction port 114 and a suction muffler chamber 116 in the interior of the swash plate type compressor 1, A front housing 120 coupled to the front side of the cylinder block 110 to form a crank chamber 122 therein and a suction chamber 132 disposed at the rear side of the cylinder block 110, (134), and a rear housing (130) having a discharge passage (136).

A valve plate 140 is installed between the front housing 120 and the rear housing 130. The valve plate 140 has a disk shape and has an outer arc A plurality of refrigerant inlets 140a are formed and a plurality of refrigerant outlets 140b are formed along the inner arc.

A suction reed valve 142 is provided in front of the valve plate 140 and a discharge reed valve 144 and a retainer 146 are installed in the rear of the valve plate 140. Here, a check valve 100 is installed in front of the valve plate 140 to prevent the refrigerant from flowing backward.

The swash plate type compressor 1 includes a cylinder block 110 and a drive shaft 160 rotatably installed at the center of the front housing 120 and a rotor (not shown) mounted in the crank chamber 122 A swash plate 170 which is connected to the swash plate 172 by a hinge 174 and whose inclination angle changes in response to the pressure change of the crank chamber 122 and a swash plate 170 which is provided on one circumference of the swash plate 170 via a shoe 176, And a plurality of pistons 180 reciprocating in the cylinder bore 112 while interlocking with the rotation of the piston 170 to suck or compress the refrigerant.

A compression coil spring 178 is provided between the swash plate 170 and the rotor 172 to return the swash plate 170 to its initial position and thus the drive shaft 160 and swash plate 170 rotate integrally The refrigerant compressed in the cylinder block 110 is discharged to the condenser through the discharge passage 136 and the discharge capacity of the refrigerant can be varied according to the inclination angle of the swash plate 170. [

The swash plate 170 maintains the minimum inclination angle when the air conditioner of the automobile is off, but since the angle does not become 0 deg., Some refrigerant can be discharged from the variable capacity compressor 1 to the condenser even when the air conditioner is off.

Therefore, in order to prevent the refrigerant from being discharged when the air conditioner is off, and to prevent the discharged refrigerant from flowing back to the variable capacity compressor 1 from the condenser, a check valve 100 is installed at the rear end of the valve plate 140 And this check valve 100 is disclosed in Japanese Patent Application Laid-Open No. 10-1120841 (Announcement of Mar. 16, 2012).

That is, the above-mentioned prior patent is filed and registered by the applicant of the present invention, so that the spool valve is brought into close contact with the inner wall of the valve case with a minimum friction area regardless of the back pressure of the refrigerant, The valve noise is prevented to prevent the valve shake and the length of the spool valve is increased to stabilize the tilt so as to effectively prevent the spooling of the spool valve at the initial inflow of the refrigerant, So that the intermediate tilting phenomenon generated by the vortex when the spool valve moves up can be prevented. In this prior patent, the refrigerant guide groove is formed in the valve seat, and the present invention is not limited to the above- It is the improvement of the precedent patent which the applicant filed and registered.

The present invention is characterized in that the front or rear side of the valve seat is configured to have a height higher than the other side so that the spool valve mounted on the valve seat can be inclined in the valve housing, And the valve opening degree of the spool valve is controlled to be set to a minimum value when the refrigerant is introduced from the initial opening of the spool valve, And it is an object of the present invention to provide a check valve of a compressor.

To achieve the above object, a check valve of a variable capacity compressor for a vehicle according to the present invention comprises: a valve case having a refrigerant discharge port formed along a circumferential surface of a cylindrical body portion whose top surface is closed; A spool valve selectively opening and closing the refrigerant outlet in the valve case; An elastic member provided between the valve case and the spool valve; A valve seat formed with a coolant inlet port and coupled to the valve case; And the valve seat is formed such that the height of the front or rear side is higher than the height of the other side so that the spool valve is inclined in the valve housing.

The refrigerant outlet includes a first refrigerant outlet formed in the longitudinal direction and a narrow width on the front side of the circumference of the cylindrical body, a pair of second refrigerant outlets formed on both sides of the circumference of the cylindrical body, And a third refrigerant outlet formed at the rear upper end of the body peripheral surface.

In addition, the lower end of the first refrigerant outlet is formed by any one of an inverted triangle, a trapezoid, or a quadrangle having a lower width smaller than the upper width.

A first coupling protrusion is protruded from the lower end of the valve case, and a first coupling groove is formed in the valve seat to receive the first coupling protrusion.

In addition, a pair of second coupling grooves are formed on both sides of the lower portion of the valve case, and a pair of second coupling projections are formed on the valve seat so as to be fitted and fixed to the second coupling groove.

The length of the spool valve in the up-and-down direction is set so that at least 1/2 of the height of the entire cylindrical body of the valve case is maintained.

The upper and lower end portions of the spool valve are respectively formed with upper and lower inclined portions having constant inclination angles along the circumferential surface of the cylindrical body portion in order to stabilize the pressure upon initial opening.

The upper inclined portion is formed with a plurality of guide grooves for guiding the refrigerant to the third refrigerant outlet at predetermined intervals.

In addition, the inner wall surface of the valve seat is kept closed by a spool valve installed in an inclined manner in the valve housing, so that the spool valve is minimally contacted with the valve housing by an initial pressure, At least one refrigerant guide groove formed to be inclined toward the refrigerant outlet side.

As described above, according to the present invention, the front or rear side of the valve seat is formed to have a height higher than the other side, and the spool valve mounted on the valve seat is inclined in the valve housing so that the initial opening of the spool valve is minimized Thereby preventing the valve noise generated between the valve case and the spool valve. In addition, when the refrigerant is introduced from the initial opening of the spool valve, the opening of the valve is rapidly performed, thereby effectively suppressing the initial shaking phenomenon.

1 is a sectional view showing a general variable capacity compressor for a vehicle.
2 is an exploded perspective view showing the structure of a check valve according to an embodiment of the present invention.
3 is an enlarged view showing the structure of a valve seat according to an embodiment of the present invention.
4 is a cross-sectional view showing the structure of a check valve according to an embodiment of the present invention.
5 is an exploded perspective view showing the structure of a check valve according to another embodiment of the present invention.
6 is a sectional view showing a check valve in a closed state according to another embodiment of the present invention.
7 is a cross-sectional view showing an open state of a check valve according to another embodiment of the present invention.
8 is an enlarged view showing the structure of a valve seat according to still another embodiment of the present invention.
9 is a cross-sectional view showing the structure of a check valve according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is an exploded perspective view showing the structure of a check valve according to an embodiment of the present invention. FIG. 3 is an enlarged view showing the structure of a valve seat according to an embodiment of the present invention. Sectional view showing the structure of the first embodiment of the present invention.

2 to 4, a check valve of a variable capacity compressor for a vehicle according to an embodiment of the present invention includes first to third refrigerant outlets 11, 12, and 13 along a circumference of a cylindrical body, A spool valve 20 installed inside the valve case 10 to selectively open and close the first to third refrigerant outlets 11, 12 and 13 while lifting up and down, An elastic member 30 inserted between the valve case 10 and the spool valve 20 and a valve seat 40 coupled to the lower end of the valve case 10 and having a refrigerant inlet 41 formed therein do.

The valve case 10 has a cylindrical shape with an upper surface closed and a lower surface opened. A valve seat 40 having a coolant inlet port 41 is inserted through the opened lower surface so as to be fixedly coupled. A first engaging protrusion 15 protrudes from the inner wall of the lower end of the valve body 10 and a first engaging groove 42 for inserting the first engaging protrusion 15 is formed in the valve seat 40 .

At this time, the valve case 10 is formed with a first refrigerant discharge port 11 on the front side of the circumferential surface of the cylindrical body portion, and a pair of second refrigerant discharge ports 12 are formed on both sides of the first refrigerant discharge port 11 The first to third refrigerant outlets 11, 12, and 13 are formed at the upper side of the circumferential surface of the cylindrical body portion of the valve case 10, And may be formed in a shape having a predetermined size, such as a square, on the circumferential surface of the cylindrical body portion of the valve case 10.

Here, the first refrigerant outlet 11 may be formed in a shape that narrows downward as it goes downward. For example, the first refrigerant outlet 11 may be formed in any shape of an inverted triangle, a sidelly or a triangle having a lower width relatively narrower than an upper width However, the present invention is not limited thereto, and it may be formed in a different shape as long as it facilitates the initial discharge of the refrigerant, or may be changed into various shapes such as different angles and lengths of left and right sides.

The third refrigerant outlet 13 may be disposed adjacent to a closed upper surface of the valve case 10. The third refrigerant discharge port 13 formed at such a high position is a so-called intermediate medium discharge chamber in which the spool valve 20 is shaken by a vortex generated from the first refrigerant discharge port 11 side ahead of the spool valve 20 when the spool valve 20 is moved upward Thereby effectively preventing the shaking phenomenon.

At this time, a support portion 16 extending downward is formed in the upper center of the valve case 10, and one end of the elastic member 30 is inserted into the support portion 16, Can be installed.

The spool valve 20 is installed such that the length of the spool valve 20 is at least 1/2 of the height of the entire cylindrical body of the valve case 10 and the valve seat 10 is closed by the valve seat 40, The upper and lower ends of the spool valve 20 are formed with upper and lower inclined portions 21 and 22 having constant inclination angles along the circumference of the cylindrical body portion for stabilizing the pressure at the time of initial opening. A guide groove 21a for guiding the refrigerant to the third refrigerant outlet 13 is formed in the upper inclined portion 21 at a predetermined interval.

That is, since the spool valve 20 is inclined, the contact with the inner surface of the valve case 10 is minimized when the valve is lifted for opening, so that the valve noise can be effectively So that it can be prevented.

At this time, a receiving portion into which the other end of the elastic member 30 is inserted is formed inside the spool valve 20, and a plurality of stepped portions 23 may be formed at a lower end of the receiving portion.

Both ends of the elastic member 30 are supported by the support portions 16 of the valve case 10 and the stepped portions 23 of the spool valve 20 to support the spool valve 20 at a constant pressure, When the pressure of the refrigerant is released, the spool valve 20 is returned to its original position.

According to one embodiment of the present invention, the valve seat 40 in the attached drawings is formed such that the height h1 of the front side is set to a height h2 of the rear side so that the spool valve 20 is inclined in the valve housing 10 ) In the first embodiment.

That is, due to the height difference (h1 >) between the front side and the rear side of the valve seat 40, the spool valve 20 is installed in an inclined state inside the valve housing 10, The valve housing 10 is minimally contacted with the inner wall surface of the valve housing 10 so that valve noise and vibration can be prevented.

However, the present invention is not limited to the embodiments illustrated in the accompanying drawings 3 and 4. 8 and 9, the installation direction of the valve seat 40 may be changed so that the spool valve 20 is inclined in the valve housing 10, but the height h2 ' Can be formed higher than the height (h1 ') on the front side.

In this case, since the spool valve 20 maintains a slope inclined forward from the inside of the valve housing 10, the movement due to inertia becomes greater and the amount of movement increases, .

Hereinafter, a main operation structure of a check valve according to an embodiment of the present invention will be described with reference to FIGS. 2 to 4 attached hereto.

The check valve according to the embodiment of the present invention is configured such that the pressure of the peripheral portion of the valve case 10 is lowered by the operation of the compressor to cause the spool valve 20 to be raised and lowered in the valve housing 10 And the first to third refrigerant outlets 11, 12, and 13 of the groove valve case 10 are sequentially opened.

That is, the valve seat 40 introduces the refrigerant from the compressor (not shown) through the refrigerant inlet port 41 and / or the lower end opening of the valve case 10, The first to third refrigerant outlets 11, 12, and 13 formed in the valve case 10 are moved up and down in an inclined state by the spool valve 20, which is installed to be inclined due to the different heights h1 and h2, Thereby releasing the refrigerant.

Such a check valve minimizes the contact between the spool valve 20 and the inner wall of the valve case 10 so as to reduce frictional resistance to the inner wall of the valve case 10 when the spool valve 20 ascends and descends In order to minimize the contact area with the inner wall of the valve case 10, noise can be effectively suppressed.

The noise generated at this time is proportional to the area of friction between the spool valve 20 and the valve case 10, so that in order to reduce the noise, the spool valve 20 ) Is inclined through the valve seat (40), it is important to minimize the contact area with the valve case (10).

In the preferred embodiment of the present invention, when the spool valve 20 is initially positioned at the lowermost end of the valve seat 40, when the refrigerant inflow port 41 and / or the lower end opening of the valve case 10 is initially opened, The refrigerant guided through the refrigerant inflow port 41 of the compressor 40 lifts up the front side of the spool valve 20 installed at an angle.

Since the front side height h1 of the valve seat 40 is higher than the rear side height h2 of the valve seat 40, the spool valve 20, which is inclined by the valve seat 40, So that the frictional resistance can be minimized while the front lower side and the rear upper side of the spool valve 20 have the minimum contact area at the inner wall of the valve case 10, respectively.

In addition, since the spool valve 20 is elevated and lowered while maintaining a minimum contact state with the inner wall of the valve case 10 in an inclined state, the spool valve 20 can be prevented from swaying from left to right, thereby effectively preventing valve noise.

At this time, since the lower end of the first refrigerant outlet 11 is formed to be narrower toward the lower side, the discharge speed of the refrigerant is increased at the initial opening, 10 to the inside of the front side of the front side of the front side of the vehicle. Thus, the valve noise during the initial opening can be minimized.

Since the refrigerant introduced through the refrigerant inlet port 41 and / or the lower end opening of the valve case 10 is discharged only through the first refrigerant outlet 11 at first, the front side of the spool valve 20 is maintained .

When the spool valve 20 further ascends and the second refrigerant outlet 12 is opened, the discharge direction of the refrigerant is dispersed to both sides. However, since the rear portion of the valve case 10 is closed, The tilting state can be maintained continuously.

On the other hand, when the spool valve 20 further ascends and the third refrigerant outlet 13, which is higher than the second refrigerant outlet 12, is opened, the refrigerant can be discharged in four directions of the valve case 10.

In other words, even if the upper surface of the spool valve 20 is moved upward in an inclined state so as to approach the third refrigerant discharge port 13, the third refrigerant discharge port 13 is not blocked by the spool valve 20 So that the body is kept open.

At this time, the upper and lower inclined portions 21 and 22 are formed at the upper and lower ends of the spool valve 20, and the plurality of guide grooves 21a are formed at the upper inclined portion 21. Therefore, The third refrigerant outlet port 13 formed at a higher position in the valve case 10 is connected to the spool valve 20 from the refrigerant flow guided through the guide groove 21a when the spool valve 20 ascends and moves inclinedly. 20 can be effectively prevented from being severely shaken.

Then, when the inflow of the coolant is completed, the spool valve 20 is lowered due to the elasticity of the elastic member 30 to return to the initial position.

5 to 7 show another embodiment of the present invention in which a pair of second engagement grooves 17 are formed on the lower sides of the lower portion of the valve case 10 and the valve seat 40 is provided with the second A pair of coupling protrusions 44 are formed to be fitted and fixed in the coupling groove 17 so that the valve seat 40 is engaged with the valve case 10 while the first refrigerant outlet 11 ' And at least one refrigerant guide groove (43) is formed on the inner wall surface of the valve seat (40) so as to be inclined toward the upper portion.

That is, in another embodiment of the present invention, in the initial state in which the spool valve 20 is positioned at an inclined state at the lowermost end of the valve seat 40, the refrigerant guide groove 43 formed in the valve seat 40 When the spool valve 20 is raised in an inclined state at the time of initial opening of the lower end opening of the refrigerant inflow port 41 while the clogged state is maintained by the spool valve 20 installed in an inclined state, The refrigerant guiding groove 43 of the valve seat 40 is opened and the refrigerant is discharged from the first refrigerant discharging opening 11 'from the opening of the refrigerant guiding groove 43 to the spool valve 20).

When the front side of the spool valve 20 is tilted upwards, the front lower portion and the rear upper portion of the spool valve 20 are brought into close contact with the inner wall of the valve case 10 with a minimum contact area, Is minimized.

In addition, since the inclined spool valve 20 ascends and descends in the minimum contact state with the inner wall of the valve case 10, the spool valve 20 is prevented from rocking to the left and right, thereby effectively preventing valve noise.

2 to 4, which are embodiments of the present invention, will not be described in detail.

The present invention is not limited to the above-described embodiment and the accompanying drawings, but is intended to be limited by the appended claims.

It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. something to do.

10; Valve cases 11 and 11 '; The first refrigerant outlet
12; A second refrigerant outlet 13; The third refrigerant outlet
15; A first engaging projection 16; Support
17; A second coupling groove 20; Spool valve
21; An upper inclined portion 21a; Guide groove
22; Lower ramp 24; Stepped portion
30; An elastic member 40; Valve seat
41; A refrigerant inlet 42; The first coupling groove
43; A refrigerant guide groove 44; The second engaging projection

Claims (11)

A valve case having a refrigerant outlet formed along a circumferential surface of a cylindrical body portion whose upper surface is closed; A spool valve selectively opening and closing the refrigerant outlet in the valve case; An elastic member provided between the valve case and the spool valve; A valve seat formed with a coolant inlet port and coupled to the valve case; And,
Wherein the valve seat is formed such that the height of the front or rear side of the valve seat is higher than the height of the other side so that the spool valve is inclined in the valve housing. The valve seat according to claim 1, wherein the valve seat has a front side height (h1) higher than a rear side height (h2) so that the spool valve can maintain an initial state tilted rearward in the valve housing The check valve of the variable capacity compressor for a vehicle. The valve seat according to claim 1, wherein the valve seat has a rear side height (h2 ') smaller than a front side height (h1') so that the spool valve can maintain an initial state in which the spool valve is inclined forward in the valve housing The check valve of the variable capacity compressor for a vehicle. The refrigerator of claim 1, wherein the refrigerant outlet comprises a first refrigerant outlet formed at a front side of a circumference of the cylindrical body portion and having a narrow width and formed in a longitudinal direction, and a pair of second refrigerant formed at both sides of the circumference of the cylindrical body portion, And a third refrigerant outlet formed at a rear upper end of the circumferential surface of the cylindrical body portion. The check valve of a variable capacity compressor for a vehicle according to claim 4, wherein the lower end of the first refrigerant outlet port is formed of an inverted triangle, a trapezoidal shape, or a quadrangle whose lower width is narrower than the upper width. 2. The variable capacity compressor for a vehicle according to claim 1, wherein a first coupling protrusion is protruded from a lower end of the valve case, and a first coupling groove into which the first coupling protrusion is inserted is formed in the valve seat valve. The valve seat according to claim 1, wherein a pair of second engagement grooves are formed on both sides of the lower portion of the valve case, and a pair of second engagement protrusions are formed on the valve seat, A check valve of a variable capacity compressor for a vehicle. The check valve of a variable capacity compressor for a vehicle according to claim 1, wherein a length of the spool valve in the up-and-down direction is set to be at least 1/2 of a height of the entire cylindrical body of the valve case. 2. The variable capacity compressor for a vehicle according to claim 1, wherein upper and lower ends of the spool valve are formed with upper and lower inclined portions having constant inclination angles along the circumferential surface of the cylindrical body portion for stabilizing the pressure upon initial opening, valve. The check valve of a variable capacity compressor for a vehicle according to claim 9, wherein a plurality of guide grooves for guiding the refrigerant to the third refrigerant outlet are formed at predetermined intervals in the upper inclined portion. The valve seat according to claim 1, wherein the valve seat is kept closed by a spool valve installed in an inclined manner in the valve housing, wherein the spool valve is in contact with the spool valve in the valve housing by an initial pressure, Wherein at least one refrigerant guide groove is formed so as to be inclined toward the upper portion so as to form the refrigerant guide groove.
KR1020150125304A 2015-09-04 2015-09-04 Check valve of variable capacity compressor vehicle KR20170029045A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210082911A (en) * 2019-12-26 2021-07-06 주식회사 인팩 Valve for hydraulic damper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210082911A (en) * 2019-12-26 2021-07-06 주식회사 인팩 Valve for hydraulic damper

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