KR20220019520A - Electronic control valve and swash plate type compressor including the same - Google Patents

Abstract

The present invention relates to an electronic control valve and a swash plate compressor including the same. According to an embodiment of the present invention, an electronic control valve and a swash plate compressor including the same can adjust the displacement on both sides of the axial direction of the electronic control valve according to a set value using first and second valves of the dual type, so that the set value can be reached more quickly.

Description

Electronic control valve and swash plate type compressor including the same

The present invention relates to a swash plate compressor, and more particularly, to an electromagnetic control valve having a dual type electromagnetic control valve provided in the swash plate compressor, and a swash plate compressor including the same.

In general, an air conditioner for a vehicle is provided with a refrigerant compression cycle device for providing cooling and heating. The refrigerant compression cycle device includes a compressor that compresses and circulates the refrigerant, and a variable capacity swash plate compressor is widely used.

The variable displacement swash plate compressor is configured so that the stroke of the piston can be adjusted according to the inclination angle of the rotating swash plate. The inclination angle of the swash plate may be adjusted by pressure in the crankcase. That is, when the high-pressure refrigerant in the discharge chamber is introduced into the crank chamber to increase the crank chamber pressure, the swash plate is disposed perpendicular to the main shaft and the stroke of the piston becomes virtually zero. Conversely, when the pressure difference is reduced by communicating the suction chamber and the crank chamber, the stroke of the piston is increased while the swash plate is inclined, and the discharge flow rate of the refrigerant is also increased.

In this way, as necessary, a control valve for selectively connecting the crank chamber to the discharge chamber or the suction chamber is provided in the swash plate compressor. The control valve can be divided into a mechanical control valve and an electromagnetic control valve according to an operation method thereof. In the case of the mechanical control valve, it is operated by the condition of the refrigerant sucked without external control. These mechanical control valves work together with the so-called "internally controlled variable compressor" and control so that the temperature at the outlet of the evaporator is maintained at 1 ~ 2℃, so the width of temperature control is small, and a clutch for on/off of the compressor is required separately. There is a downside to

On the other hand, the electronic control valve is used together with an "externally controlled variable compressor" and includes an actuating rod driven by an electromagnetic actuator such as a solenoid therein. The actuating rod moves the valve bodies according to the on/off of the solenoid, so that the discharge chamber, the crank chamber and the suction chamber can selectively communicate with each other and the opening degree thereof can be adjusted. For this reason, the externally controlled variable compressor can adjust the outlet temperature of the evaporator in the range of 1 to 12°C, enabling optimized operation for the cooling load, thereby reducing power consumption and operating without a clutch. Therefore, it has the advantage of reducing the manufacturing cost.

Recently, in connection with problems such as strengthening of environmental regulations and limiting the mileage of electric vehicles, efforts are being made to reduce the power consumption of the air conditioner mounted on the vehicle, particularly the power consumption of the compressor. In the above-described variable compressor, when the cooling load is large, the valve is fully opened and operated to respond to the cooling load. However, when the cooling load is not large, the piston stroke can be reduced by adjusting the valve opening degree, thereby reducing power consumption. let it be

In addition, the electronic control valve targets so that the opening degree of the electronic control valve changes according to the degree to which the temperature control button of the air conditioner provided on the driver's seat center fascia is adjusted, and the change in the opening degree controls the stroke value quickly and accurately Only then can the performance of the air conditioner be improved.

When temperature control is performed together with the operation of the air conditioner in a conventional general swash plate compressor, a control state according to cooling capacity will be described with reference to the drawings.

1 to 2, in the swash plate compressor, when the target cooling capacity is set, the electronic control valve is operated to converge to the set value in order to reach it, thereby cooling the cooling capacity (cooling capacity) It can be seen that a chattering phenomenon occurs in which capacity and duty are severely fluctuated.

In particular, it can be seen that when the RPM is changed and the swash plate angle is changed, the duty is drastically changed.

The shaking phenomenon is a stroke change that occurs to reach a set value as the valve tip (not shown) contacts and releases the contact with the valve tip seating part (not shown) among the components provided inside the electronic control valve repeatedly repeatedly. is caused by

In this case, the electronic control valve inevitably causes wear due to relative friction as the valve tip contacts and releases contact with the valve tip seating portion repeatedly, and the wear rate is significantly increased as the repeated friction is concentrated. became

As such, when abrasion occurs in the electronic control valve for a long period of time, the operation of the swash plate compressor and deterioration of the performance of the air conditioner may be caused, so it is necessary to deal with this.

Registered Patent No. 10-1607708 (March 24, 2016)

SUMMARY One embodiment of the present invention is to provide an electronic control valve capable of optimally maintaining movement displacement according to the amount of stroke change by configuring the electronic control valve as a dual type, and a swash plate compressor including the same.

In order to achieve the above object, the swash plate compressor according to the first embodiment of the present invention includes a housing having a crank chamber, a suction chamber and a discharge chamber formed therein; a drive shaft rotatably mounted in the crankcase; a swash plate mounted so that an angle with respect to the driving shaft can be adjusted, and rotating together with the driving shaft; a piston reciprocating by the swash plate; a cylinder into which the piston is inserted to provide a compression space for compressing the refrigerant; and a valve unit mounted on the housing and selectively communicating with the crankcase so that refrigerant can move through the discharge chamber and the suction chamber, wherein the valve unit is the inner side of the casing part (100). A first valve 210 provided on one side in the axial direction with respect to the inner center of the casing part 100 in order to respectively control the opening amount of refrigerant flowing into and out of the casing, and the casing coaxially with the first valve 210 It includes a second valve 220 symmetrically positioned on the other side of the unit 100,

The valve unit 200 is characterized in that the movement displacement of the stroke is divided and simultaneously controlled by the first and second valves 210 and 220 according to the operating temperature of the air conditioner set by the driver.

The electronic control valve according to the second embodiment of the present invention includes a casing portion 100 formed in a symmetrical shape; A first valve 210 provided on one side in the axial direction with respect to the inner center of the casing part 100 in order to respectively control the opening amount of the refrigerant flowing into and out of the casing part 100, and the first valve a valve unit 200 including a second valve 220 symmetrically positioned on the other side of the casing part 100 coaxially with the 210; and a first valve control unit 310 provided to control movement displacement when the first valve 210 is independently moved in the axial direction of the casing unit 100 and movement of the second valve 220 . and a valve control unit 300 provided with a second valve control unit 320 to independently control the displacement.

The casing part 100 may include a first passage 101 connected to a first communication passage 2 branched from the crank chamber 21 formed in the compressor toward the first valve 210; a second passage (102) connected to a second communication passage (3) branched from the discharge chamber (33) formed in the compressor toward the first valve (210); and a third passage 103 connected to a third communication passage 4 branched from the suction chamber 31 formed in the compressor toward the first valve 210 .

The casing part 100 may include a fourth passage 101a connected to a fourth communication passage 2a branched from the crank chamber 21 formed in the compressor toward the second valve 220; a fifth passage (102a) connected to a fifth communication passage (3a) branched from the discharge chamber (33) formed in the compressor toward the second valve (220); and a sixth passage 103a connected to a sixth communication passage 4a branched from the suction chamber 31 formed in the compressor toward the second valve 220 .

The casing part 100 has an insulator 400 for insulating each magnetic field and electromagnetic force generated between the first valve 210 located on one side in the axial direction and the second valve 220 located on the other side in the axial direction. ) is provided.

The first valve 210 includes a first operating rod 212 coupled to a first plunger (F1) provided to be slidably movable in the inner axial direction of the casing portion 100; a first valve tip 214 provided at one end of the first actuating rod 212 in the axial direction and seated on the first valve seat 213; First elastic means (216) for applying an elastic force when the first operation rod (212) is moved in the axial direction in a state supported inside the casing part (100) at the other end of the first operation rod (210) ; and a first coil C1 positioned to surround the outside of the first plunger F1 and provided to move the first actuating rod 212 in an axial direction when a current is applied.

The second valve 220 includes a second operating rod 222 coupled to a second plunger (F2) provided to be slidably movable in the inner axial direction of the casing portion 100; a second valve tip 224 provided at one end of the second actuating rod 222 in the axial direction and seated on the second valve seat 223; A second elastic means 226 for applying an elastic force when the first operation rod 222 is moved in the axial direction in a state supported inside the casing part 100 at the other end of the second operation rod 212 . ; and a second coil C2 positioned to surround the outside of the second plunger F2 and provided to move the second actuating rod 222 in the axial direction when current is applied.

The first elastic means 216 includes a first spring 216a for supporting the first valve tip 214; and a second spring 216b for supporting the other end of the first actuating rod 210 .

The second elastic means 226 includes a first spring 226a for supporting the second valve tip 224; and a second spring 226b for supporting the other end of the second actuating rod 220 .

In the valve unit 200 , movement displacement of the stroke is simultaneously controlled by the first and second valve controllers 310 and 320 according to the operating temperature of the air conditioner set by the driver, and necessary for the operation of the valve unit 200 . The total stroke amount is divided by the first valve 210 and the second valve 220, respectively.

The first valve 210 is connected through the second communication path 3 communicating with the discharge chamber 33 when current is applied to the first coil C1 when the air conditioner is turned on and the operating temperature is set. After the discharged refrigerant flows into the casing 100 through the second passage 102 , it flows into the crank chamber 21 via the first passage 101 and the first communication passage 2 . Moving, the first operation rod 212 is characterized in that the movement is made in the first stroke in the axial direction of the second valve (220).

In the second valve 220 , when the air conditioner is turned on and current is applied to the second coil C2 , the refrigerant discharged through the fifth communication path 3a communicating with the discharge chamber 33 is discharged from the second valve 220 . After flowing into the inside of the casing 100 through the 5 passages 102a, it is moved to the crank chamber 21 via the fourth passage 101a and the fourth communication passage 2a, and the second The operation rod 222 is characterized in that the movement is made in the second stroke toward the axial direction of the first valve (210).

The first valve 210 is connected to the first valve 210 by the pressure transmitted through the first passage 101 communicating with the crankcase 21 when the current is cut off in the first coil C1 as the air conditioner is turned off. As the first operation rod 212 coupled to the plunger F1 moves in the direction of the second valve 220, it is in close contact with the first valve seating part 213 to maintain an open state, and the refrigerant is supplied to the crank chamber ( 21), after flowing into the inside of the casing 100 through the first passage 102, the first passage 101, the third passage 103, and the third communication passage 4 It is characterized in that it is moved to the suction chamber (31).

The second valve 220 is connected to the second plunger F2 by the pressure transmitted through the fourth passage 101a in communication with the crankcase 21 when the current is cut off in the second coil C2. As the second operation rod 222 coupled to is moved in the direction of the first valve 210 , it is in close contact with the second valve seat 223 to maintain an open state, and the refrigerant is transferred from the crankcase 21 to the It is characterized in that it moves to the suction chamber (31) via a sixth passage (103a) and a sixth communication passage (4a).

In one embodiment of the present invention, a dual-type electronic control valve can be operated to reduce vibration symptoms, prevent abrasion of the valve tip, and improve control performance because a set value can be reached more quickly.

According to the exemplary embodiments of the present invention, the overall movement amount according to the stroke of the electronic control valve is reduced and the accuracy is improved, so that the satisfaction of the driver can be improved.

1 to 2 are graphs showing target cooling capacity, cooling capacity, and duty change amount according to the operation of an electronic control valve provided in a conventional swash plate compressor.
3 is a cross-sectional view showing a swash plate compressor equipped with an electronic control valve according to an embodiment of the present invention.
4 to 5 are views showing the configuration of the electronic control valve and the flow of refrigerant according to an embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. The thickness of the lines or the size of components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or precedent of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

Hereinafter, a swash plate compressor according to a first embodiment of the present invention will be described with reference to the drawings.

3 to 5, in the swash plate compressor, a center bore 11 is formed through the center of the cylinder 10, and the center bore 11 is radially surrounded by the center bore 11 to penetrate the cylinder 10. A plurality of cylinder bores 13 are formed to do so. The cylinder bore 13 has a piston 15 installed therein to be movable along the axial direction of the drive shaft 40 to be described later, thereby compressing the refrigerant in the cylinder bore 13 .

A front housing 20 is installed at one end of the cylinder 10, and a rear housing 30 is installed at the opposite side where the front housing 20 is installed. The front housing 20 cooperates with the cylinder 10 to form a crank chamber 21 therein, and a suction chamber 31 is formed in the rear housing 30 to selectively communicate with the cylinder bore 13 . . The suction chamber 31 serves to deliver the refrigerant to be compressed into the cylinder bore 13 .

A discharge chamber 33 is formed in the rear housing 30 , and the discharge chamber 33 is formed in a region corresponding to the center of a surface of the rear housing 30 facing the cylinder 10 . The discharge chamber 33 is a place where the refrigerant compressed in the cylinder bore 13 is discharged and temporarily stays there.

The rear housing 30 is provided with an electromagnetic control valve 1 on one side. The electromagnetic control valve 1 includes the opening degree of the flow path between the crank chamber 21 and the discharge chamber 33 and the discharge chamber 33 and the crank. It serves to adjust the angle of the swash plate 48 to be described later by adjusting the opening degree of the flow path between the seals (21).

On the other hand, the drive shaft 40 is rotatably installed through the center bore 11 of the cylinder 10 and the shaft hole 23 of the front housing 20 . The drive shaft 40 rotates by the driving force transmitted from the engine. The drive shaft 40 is rotatably installed in the cylinder 10 and the front housing 20 by a bearing 42 .

In addition, the drive shaft 40 passes through the center, and a rotor 44 that rotates integrally with the drive shaft 40 is installed in the crank chamber 21 . At this time, the rotor 44 is installed to be fixed to the drive shaft 40 in a substantially disk shape, and a hinge arm 46 protrudes from one surface of the rotor 44 .

A swash plate 48 is hingedly coupled to the rotor 44 on the drive shaft 40 to rotate together. The swash plate 48 is installed at a variable angle with respect to the drive shaft 40 according to the discharge capacity of the compressor. That is, the angle of the swash plate 48 is varied in a state orthogonal to the longitudinal direction of the driving shaft 40 or inclined at a predetermined angle with respect to the driving shaft 40 .

The swash plate 48 is connected through the plurality of pistons 15 and the shoes 50 in edge positioning. The edge of the swash plate 48 is connected to the connection part of the piston 15 through the shoe 50 so that the piston 15 linearly reciprocates in the cylinder bore 13 by the rotation of the swash plate 48 .

A connecting arm 52 connected to the hinge arm 46 of the rotor 44 is protruded from the swash plate 48 . A hinge pin 54 is installed at the distal end of the connecting arm 52 in a direction orthogonal to the longitudinal direction of the connecting arm 52 . The hinge pin 54 is formed at the distal end of the hinge arm 46 of the rotor 44 . It is movably hung on the support part (47).

A semi-reflective spring 56 is installed between the rotor 44 and the swash plate 48 to provide an elastic force. The semi-reflective spring 56 is installed around the outer surface of the driving shaft 40, and provides an elastic force in a direction in which the inclination angle of the swash plate 48 is decreased.

A swash plate stopper 58 is formed to protrude from one surface of the swash plate 48 . The swash plate stopper 58 serves to regulate the degree to which the swash plate 48 is inclined with respect to the drive shaft 40 .

A shaft stopper 60 is provided at one end of the drive shaft 40 . The shaft stopper 60 is installed around the outer surface of the drive shaft 40, and when the swash plate 48 is erected in a direction perpendicular to the longitudinal direction of the drive shaft 40, it serves to regulate the installation position.

The electromagnetic control valve 1 includes a valve unit 200, and the valve unit 200 controls the stroke by first and second valves 210 and 220 to be described later according to the operating temperature of the air conditioner set by the driver. Since the movement displacement can be divided and individually adjusted at the same time, the movement displacement of the stroke due to electromagnetic force is reduced, and at the same time, the first and second valves 210 and 220 ) can work.

Through this, the first and second valves 210 and 220 are divided into the first and second valves 210 and 220 so that the frequency at which the vibrations occur multiple times to reach the operating temperature of the air conditioner set prior to operation is divided into the first and second valves 210 and 220, and thus wear occurs. It is possible to reduce the problems caused by air conditioning and to improve the performance of the air conditioner at the same time. A more detailed configuration of the valve unit 200 will be described later.

The electronic control valve 1 according to the second embodiment of the present invention has a casing part 100 formed in a symmetrical shape, and the casing part to control the opening amount of refrigerant flowing into and out of the casing part 100, respectively. A first valve 210 provided on one side in the axial direction with respect to the inner center of 100, and a second valve symmetrically positioned on the other side of the casing part 100 coaxially with the first valve 210 ( 220) and a first valve control unit 310 provided to control movement displacement when the valve unit 200 and the first valve 210 independently move in the axial direction of the casing unit 100 and , and a valve control unit 300 provided with a second valve control unit 320 to independently control the movement displacement of the second valve 220 .

In the casing part 100 , the first and second valves 210 and 220 are disposed symmetrically in the axial direction. A first casing 110 forming an outer shape of the first valve 210 and a second casing 120 having the second valve 220 therein are included. The first valve 210 is disposed inside the first casing 110 in the 12 o'clock direction with respect to the axial direction, and the second valve 220 is disposed inside the second casing 120 in the 6 o'clock direction. placed towards Since the first and second valves 210 and 220 are vertically symmetrical with each other, internal components are arranged in the same structure.

A plurality of grooves are formed on the outer circumferential surface of the casing unit 100, and first to second O-rings are fitted into the grooves, respectively. The first and second O-rings are installed to prevent refrigerant from leaking into a gap between the electronic control valve and the housing.

The casing part 100 includes a first passage 101 connected to a first communication passage 2 branched from a crank chamber 21 formed in the compressor toward the first valve 210, and a discharge formed in the compressor. The second passage 102 connected to the second communication passage 3 branched from the chamber 33 toward the first valve 210, and the first valve 210 in the suction chamber 31 formed in the compressor and a third passage 103 connected to the third communication passage 4 branched toward.

The casing part 100 includes a fourth passage 101a connected to a fourth communication passage 2a branched from the crank chamber 21 formed in the compressor toward the second valve 220, and a discharge formed in the compressor. A fifth passage (102a) connected to a fifth communication passage (3a) branched from the chamber (33) toward the second valve (220), and the second valve (220) in the suction chamber (31) formed in the compressor It includes a sixth passage (103a) connected to the sixth communication passage (4a) branched toward.

The casing part 100 communicates with the first communication path 2 from the crankcase 21 and includes a first passage 101 provided with a first valve 210, a fourth communication passage 2a, and The refrigerant may move at the same time through the fourth passage 101a that communicates and is provided with the second valve 220 .

In this way, when the refrigerant does not move to one place toward the casing part 100, but is branched toward the first and second valves 210 and 220, respectively, and moves independently, the air conditioner operates at the same time as the set value according to the input temperature. Stroke movement displacements of the first and second valves 210 and 220 are divided respectively.

That is, the displacement according to the movement of the stroke can be divided and operated in both directions faster and more accurately than the prior art in which only one valve is used, thereby shortening the time to reach the set value and reducing the amount of stroke movement.

The casing part 100 has an insulator 400 for insulating each magnetic field and electromagnetic force generated between the first valve 210 located on one side in the axial direction and the second valve 220 located on the other side in the axial direction. ) is provided.

In the insulator 400 , when current is applied to the first and second valves 210 and 220 , the magnetic field and electromagnetic force generated from the first valve 210 affect the second valve 220 , or the second It is provided to prevent the magnetic field and electromagnetic force generated from the valve 220 from affecting the first valve 210 .

In this case, the stroke displacement amount of the first and second valves 210 and 220 may be precisely controlled according to the amount of applied current.

The first valve 210 includes a first actuating rod 212 coupled to a first plunger F1 provided to be slidably movable in the inner axial direction of the casing part 100 , and the first actuating rod 212 . ) provided at one end of the axial direction, the first valve tip 214 seated on the first valve seat 213 , and the casing portion 100 at the other end of the first operation rod 210 . ) and the first elastic means 216 for applying an elastic force when the first actuating rod 212 is moved in the axial direction in a state supported on the inside, and the first plunger (F1) is positioned surrounding the outside, and a first coil C1 provided to move the first actuating rod 212 in the axial direction upon application.

A first plunger F1 is inserted into the first operation rod 212 in the axial direction, and the first coil C1 is wrapped around the first plunger F1. A stator is installed inside the first coil C1 in a radial direction to be magnetized by the current supplied to the first coil C1 so that the first operation rod 212 is moved in the axial direction.

The first coil C1 and the stator constitute an electromagnetic actuator for driving the first valve 210, but in the present invention, a piezoelectric element or a stepping motor capable of controlling movement by applying a current is used. It may also be possible to use

The first operation rod 212 is a cylinder or is configured as a hollow cylinder with an empty interior.

The first valve tip 214 is formed in the shape shown in the drawing, is seated on the first valve seat 213 , and the first valve tip 214 moves to the first valve seat 213 according to the amount of stroke displacement. repeated contact with

In this embodiment, the first valve tip 214 is provided to converge to a target set value (temperature value) simultaneously with the operation of the air conditioner. The occurrence of chattering is reduced while the first valve tip 214 is in repeated contact with the first valve seat 213 .

In this embodiment, the second valve 220 is provided together with the first valve 210 , and the second valve tip 224 also repeatedly contacts the second valve seat 223 in the second valve 220 . tremor is reduced.

When the first and second valves 210 and 220 are configured as dual, the number of times of contact is reduced compared to the prior art when the opening amount of the first and second valves 210 and 220 is adjusted using only one valve. The vibration phenomenon is also reduced, so that damage and deformation of the first and second valve tips 214 and 224 are prevented.

The first elastic means 216 includes a first spring 216a for supporting the first valve tip 214 and a second spring 216b for supporting the other end of the first operation rod 210 . do.

Since the first spring 216a receives the compressive force as it is when the first actuating rod 212 moves in the axial direction, the compressive stress according to the vibration is transferred as it is.

The first spring 216a is stably elastically deformed by the compressive force of the first actuating rod 212 within the set life limit, but may be deformed or damaged when exceeding the life limit, so in the present invention, in order to prevent this, the first actuating rod The number of stroke movements of 212 is reduced compared to the prior art, and thus the above-described problem is prevented.

Accordingly, the life of the first spring 216a can be increased, so that durability and safety are improved at the same time.

The second spring 216b is a shaft that is repeatedly generated by reducing the shock generated by the first actuating rod 212 coming into contact with and releasing the contact with the first valve tip 214 to the first valve seat 213 . reduce the load.

The second valve according to an embodiment of the present invention will be described in more detail.

The second valve 220 includes a second actuating rod 222 coupled with a second plunger F2 provided to be slidably movable in the inner axial direction of the casing part 100 , and the second actuating rod 222 . A second valve tip 224 provided at one end of the axial direction and seated on the second valve seating portion 223, and the casing portion 100 at the other end of the second operating rod 212. A second elastic means 226 for applying an elastic force when the first actuating rod 222 is moved in the axial direction in a state supported on the inside, and positioned to surround the outside of the second plunger F2, when current is applied and a second coil C2 provided to move the second actuating rod 222 in the axial direction.

A second plunger F2 is inserted into the second operation rod 222 in the axial direction, and a second coil C2 is wrapped around the second plunger F2. A stator is installed inside the second coil C2 in the radial direction to be magnetized by the current supplied to the second coil C2 so that the second operation rod 222 is moved in the axial direction.

The second coil C2 and the stator constitute an electromagnetic actuator for driving the second valve 220, but in the present invention, a piezoelectric element or a stepping motor capable of controlling movement by applying a current is used. It may also be possible to use

The second actuating rod 222 is a cylinder or is configured as a hollow cylinder with an empty interior.

The second valve tip 224 is formed in the shape shown in the drawing, is seated on the second valve seat 223, and the second valve tip 224 moves to the second valve seat 223 according to the amount of stroke displacement. repeated contact with

In this embodiment, in order to converge to a target set value (temperature value) simultaneously with the operation of the air conditioner, the second valve tip 224 is in contact with the second valve seat 223 repeatedly while chattering is generated. The first and second valves 210 and 220 are dually provided to reduce the

In this way, when the first and second valves 210 and 220 are configured as a dual type, the number of times the first and second valves 210 and 220 are contacted more than when the opening degree is adjusted using only one valve compared to the prior art. is reduced and the vibration phenomenon is also reduced, preventing damage and deformation.

The second elastic means 226 includes a first spring 226a supporting the second valve tip 224 and a second spring 226b supporting the other end of the second operation rod 220 . do.

Since the first spring 226a receives the compressive force as it is when the second actuating rod 222 moves in the axial direction, the compressive stress according to the vibration is transferred as it is.

The first spring 226a is elastically deformed by the compressive force of the second actuating rod 222 stably within the set life limit, but may be deformed or damaged when exceeding the life limit, so in the present invention, in order to prevent this, the second actuating rod The number of stroke movements of 222 is reduced compared to the prior art, thereby preventing the above-described problem.

Therefore, the life of the first spring 226a can be increased, so that durability and safety are improved at the same time.

The second spring 226b is a shaft that is repeatedly generated by reducing the shock generated by the second actuating rod 222 contacting and releasing the second valve tip 224 to the second valve seat 223 . reduce the load.

The valve unit 200 is a set value according to the operating temperature of the air conditioner set by the driver and is controlled by the first and second valve controllers 310 and 320 so that the movement displacement of the stroke converges to the set value at the same time, the valve Assuming that the total stroke amount required for operation of the unit 200 is 100, the first valve 210 and the second valve 220 only need to move by 50, respectively, so as in the prior art, a single valve operates with a stroke amount of 100 It is possible to reduce the displacement due to movement compared to the

The first valve 210 is discharged through the second communication path 3 communicating with the discharge chamber 33 when current is applied to the first coil C1 after the air conditioner is turned on and the operating temperature is set. After the refrigerant is introduced into the casing 100 through the second passage 102 , it moves to the crank chamber 21 via the first passage 101 and the first communication passage 2 . do. And the first actuating rod 212 is made to move in a first stroke in the axial direction of the second valve (220).

In the second valve 220 , when the air conditioner is turned on and current is applied to the second coil C2 , the refrigerant discharged through the fifth communication path 3a communicating with the discharge chamber 33 is discharged from the second valve 220 . After flowing into the inside of the casing 100 through the 5 passages 102a, it is moved to the crank chamber 21 via the fourth passage 101a and the fourth communication passage 2a, and the second The actuating rod 222 is moved in a second stroke in the axial direction of the first valve 210 .

The first and second valves 210 and 220 control the current applied by the first and second valve controllers 310 and 320 to converge to a set operating temperature when the air conditioner is turned on, so that the first and second valves 210 , 220) may converge to a set value while moving in specific strokes on both sides of the axial direction of the first and second shafts 212 and 222, respectively.

In this case, the pressure in the crankcase 21 is lowered and the inclination angle of the swash plate is changed to the maximum, so that the discharge amount of the refrigerant is also maintained to the maximum.

Referring to FIG. 5 , the first valve 210 is transmitted through the first passage 101 communicating with the crankcase 21 when the air conditioner is turned off and the current is cut off in the first coil C1 . The first actuating rod 212 coupled to the first plunger F1 is moved in the direction of the second valve 220 by the applied pressure and is in close contact with the first valve seat 213 to maintain an open state. .

After the refrigerant flows into the casing 100 from the crank chamber 21 through the first passage 102, the first passage 101, the third passage 103, and the third communication passage ( It is moved to the suction chamber 31 via 4).

And the second valve 220 is the second plunger F2 by the pressure transmitted through the fourth passage 101a in communication with the crankcase 21 when the current is cut off in the second coil C2. ) and the coupled second operation rod 222 is moved in the direction of the first valve 210 and is in close contact with the second valve seat 223 to maintain an open state, and the refrigerant is stored in the crankcase 21 . It moves to the suction chamber 31 via the sixth passage 103a and the sixth communication passage 4a.

In this case, the crank chamber 21 has a high pressure and the inclination angle of the swash plate is reduced, so that the amount of refrigerant discharged is also minimized.

An embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of the present invention is limited only by the matters described in the claims, and it is possible for those of ordinary skill in the art to improve and change the technical idea of the present invention in various forms. Accordingly, as long as such improvements and modifications are obvious to those of ordinary skill in the art, they will fall within the scope of the present invention.

100: casing part
101, 101a: first passage, fourth passage
102, 102a: second passage, fifth passage
103, 103a: third passage, sixth passage
200: valve unit
210, 220: first and second valves
212, 222: first and second shafts
214, 224: first and second valve tips
216, 226: first and second elastic means
216a, 226a: first spring
216b, 226b: second spring
C1, C2: first and second coils
300: valve control
310, 320: first and second valve control units
400: insulator

Claims (12)

a casing portion formed in a symmetrical shape;
A first valve provided on one side in the axial direction with respect to the inner center of the casing portion in order to respectively control the opening amount of refrigerant flowing into and out of the casing portion, and the first valve and the other side of the casing portion symmetrically positioned a valve unit including a second valve; and
A first valve control unit provided to control movement displacement when the first valve is independently moved in the axial direction of the casing unit, and a second valve control unit to independently control movement displacement of the second valve An electronic control valve comprising a valve control unit. According to claim 1,
The casing portion includes: a first passage connected to a first communication passage branched toward the first valve in a crank chamber formed in the compressor;
a second passage connected to a second communication passage branched from the discharge chamber formed in the compressor toward the first valve;
and a third passage connected to a third communication passage branched from the suction chamber formed in the compressor toward the first valve. According to claim 1,
The casing portion includes: a fourth passage connected to a fourth communication passage branched toward the second valve in the crank chamber formed in the compressor;
a fifth passage connected to a fifth communication passage branched from the discharge chamber formed in the compressor toward the second valve;
and a sixth passage connected to a sixth communication passage branched from the suction chamber formed in the compressor toward the second valve. According to claim 1,
An insulator for insulating each magnetic field and electromagnetic force generated between the first valve located on one side in the axial direction and the second valve located on the other side in the axial direction is provided in the casing portion. According to claim 1,
The first valve may include a first actuating rod coupled to a first plunger provided to be slidably movable in an inner axial direction of the casing portion;
a first valve tip provided at one end of the first actuating rod in the axial direction and seated on the first valve seat;
a first elastic means for applying an elastic force when the first operation rod is moved in the axial direction in a state supported inside the casing at the other end of the first operation rod;
The electronic control valve including a first coil positioned to surround the outer side of the first plunger and provided to move the first actuating rod in an axial direction when a current is applied. According to claim 1,
The second valve may include a second actuating rod coupled to a second plunger provided to be slidably movable in an inner axial direction of the casing portion;
a second valve tip provided at one end of the second actuating rod in the axial direction and seated on the second valve seat;
second elastic means for applying an elastic force when the first operation rod is moved in the axial direction in a state supported inside the casing at the other end of the second operation rod;
and a second coil positioned to surround the outside of the second plunger and provided to move the second actuating rod in an axial direction when a current is applied. 6. The method of claim 5,
The first elastic means may include a first spring for supporting the first valve tip;
Electronic control valve including a second spring for supporting the other end of the first actuating rod. 7. The method of claim 6,
The second elastic means may include a first spring for supporting the second valve tip;
Electronic control valve including a second spring for supporting the other end of the second actuating rod. According to claim 1,
In the valve unit, stroke movement and displacement are simultaneously controlled by the first and second valve controllers according to the operating temperature of the air conditioner set by the driver,
The total amount of stroke required for the operation of the valve unit is an electromagnetic control valve, characterized in that each is divided by the first valve and the second valve. 6. The method of claim 5,
In the first valve, when an electric current is applied to the first coil after the air conditioner is turned on and the operating temperature is set, the refrigerant discharged through the second communication path communicating with the discharge chamber flows through the second passage into the casing. After being introduced into the furnace, it is moved to the crank chamber via the first passage and the first communication passage,
The first actuating rod is an electromagnetic control valve, characterized in that the movement is made in the first stroke in the axial direction of the second valve. 7. The method of claim 6,
In the second valve, when the air conditioner is turned on and current is applied to the second coil, the refrigerant discharged through the fifth communication passage communicating with the discharge chamber flows into the casing through the fifth passage. moved to the crank chamber via a fourth passage and the fourth communication passage,
The second actuating rod is an electromagnetic control valve, characterized in that the movement is made in a second stroke in the axial direction of the first valve. a housing having a crank chamber, a suction chamber and a discharge chamber formed therein;
a drive shaft rotatably mounted in the crankcase;
a swash plate mounted so that an angle with respect to the driving shaft can be adjusted, and rotating together with the driving shaft;
a piston reciprocating by the swash plate;
a cylinder into which the piston is inserted to provide a compression space for compressing the refrigerant; and
A swash plate compressor including a valve unit mounted on the housing and selectively communicating with the crankcase so that the refrigerant can move through the discharge chamber and the suction chamber,
The valve unit includes a first valve provided on one side in the axial direction with respect to the inner center of the casing part to control the opening amount of the refrigerant flowing into and out of the casing part, and the other side of the casing part coaxial with the first valve. A second valve positioned symmetrically to
The valve unit is a swash plate compressor, characterized in that the movement displacement of the stroke is divided and controlled at the same time by the first and second valves according to the operating temperature of the air conditioner set by the driver.

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