WO2017116194A1

WO2017116194A1 - Electronic control valve of variable-capacity compressor

Info

Publication number: WO2017116194A1
Application number: PCT/KR2016/015537
Authority: WO
Inventors: 황만익
Original assignee: 주식회사 뉴로스
Priority date: 2015-12-31
Filing date: 2016-12-30
Publication date: 2017-07-06
Also published as: KR101815634B1; KR20170079755A

Abstract

The present invention relates to an electronic control valve of a variable-capacity compressor and, more specifically, to an electronic control valve of a variable-capacity compressor, the valve comprising: a valve body having a crank chamber pressure port, a discharge pressure port, and a suction pressure port; a valve part including, therein, a hollow guide for opening only any one of a first passage connected from the discharge pressure port to the crank chamber pressure port and a second passage connected from the crank chamber pressure port to the suction pressure port; and a solenoid for closing the other side of the valve part, wherein bellows tension allowing the guide to be elastically supported toward the solenoid is formed so as to be adjustable by the rotation of a tension adjustment part closing one end of the valve part, and thus pressure linearity and control precision are improved.

Description

Electronic control valve of variable displacement compressor

The present invention relates to an electronic control valve of a variable displacement compressor, and more particularly, a valve body in which a crankcase pressure port, a discharge pressure port, and a suction pressure port are formed, and connected from the discharge pressure port to the crankcase pressure port therein. And a solenoid for closing the other side of the valve part, the valve part including a hollow guide for opening only one of the first passage and the second passage connected from the crankcase pressure port to the suction pressure port. In the electronically controlled valve, the bellows tension adjustment for elastically supporting the guide to the solenoid side by rotation of the tension control unit closing one end of the valve unit is made possible, thereby improving the pressure linearity and control accuracy of the variable displacement compressor. It relates to an electronic control valve.

BACKGROUND ART Generally, a vehicle air conditioner includes a variable capacity compressor driven by an engine to compress a refrigerant and varying the discharge amount according to a cooling demand, a condenser condensing the refrigerant discharged from the compressor, and insulating the liquefied refrigerant through the condenser. It expands to make a mixture of gas and liquid, and uses the electronic expansion valve whose opening degree changes according to the refrigerant discharge amount of the compressor and the latent heat of evaporation when the refrigerant is evaporated to cool the surrounding air and return the refrigerant to the compressor. An evaporator, and a control unit for controlling the refrigerant discharge amount of the compressor according to the air conditioning environment, such as the indoor temperature and the outdoor temperature input from the various sensors installed inside and outside the vehicle, and the air conditioning conditions input by the user.

When operating the air conditioning device configured as described above, the control unit of the compressor according to the air conditioning conditions, such as the indoor air temperature and outdoor temperature transmitted from the various sensors, and the air conditioning conditions such as the vehicle indoor set temperature set by the user, function selection such as heating or cooling The refrigerant discharge amount is changed.

In the above air conditioner, the variable displacement swash plate compressor generally uses a pressure regulating valve for adjusting the inclination angle of the swash plate to control the amount of refrigerant discharge. Recently, an electronic control valve driven by electric control is controlled. (Hereinafter referred to as 'ECV') is used.

In the case of a variable displacement swash plate type compressor employing ECV, the inclination of the swash plate is changed by the ECV duty or the current applied to the ECV, and the refrigerant discharge amount of the compressor is determined by the inclination of the swash plate.

Related technologies include Korean Patent Publication No. 2011-0040207 (published date: April 20, 2011, name: drive control method of a variable displacement swash plate compressor).

On the other hand, although the structure of the electronic control valve used in the variable displacement compressor is slightly different depending on the structure of the compressor or the like, the basic principle is almost the same, and thus the conventional configuration example shown in FIG. It will be described through. And the configuration of such a control valve is also substantially known, and will be described schematically with a partial center associated with the present invention.

An example of the electronic control valve of the conventional variable displacement compressor shown in FIG. 1 was developed by T company in Japan, and a relief valve 40 is provided therein to provide a crankcase pressure port 21 and a discharge pressure port 22. And a valve body 20 having a suction pressure port 23 formed therein, and a solenoid 30.

According to this configuration, as shown in FIG. 1A during the ON operation of the solenoid 30, the suction pressure port 23 communicates with the crankcase pressure port 21, and the solenoid 30 In the OFF operation of FIG. 1, the crankcase pressure port 21 communicates with the discharge pressure port 22.

One example of such an electronic control valve of a conventional variable displacement compressor has the advantage of low cost.

In addition, another example of the electronic control valve of the conventional variable displacement compressor shown in Figure 2 was developed by E Company in Japan, the bellows 70 is provided therein, the bellows 70 is inserted into the bellows A valve body including an upper cap 71 and a lower cap 72 moving vertically by elastic force of the crankcase pressure port 51, a discharge pressure port 52, and a suction pressure port 53. And a solenoid 60.

According to this configuration, the suction pressure port 53 is communicated from the crankcase pressure port 51 when the solenoid 60 is turned on, as shown in FIG. 2), the crankcase pressure port 51 communicates with the discharge pressure port 52 as shown in FIG.

Therefore, the electronic control valve of the conventional variable displacement compressor is capable of controlling the amount of refrigerant discharged by adjusting the inclination angle of the swash plate through the crankcase pressure through the above-described operation.

However, an example of an electronic control valve of a conventional variable displacement compressor developed by T in Japan has a disadvantage in that a large-capacity solenoid is required, linearity against pressure change, and hysteresis is large.

In addition, another example of the solenoid valve of the conventional variable displacement compressor developed by E company in Japan is manufactured by welding the bellows to be vacuum, and the production cost is higher due to the characteristics of the bellows dimension and the precision of the spring tension. There was a downside.

In addition, the bellows tension is determined when the E control valve is press-fitted and assembled to a certain dimension, and when the pressure characteristic is out of the specification range of the hysteresis curve, there is a limit to adjust it to be located within the range by adjusting externally.

In addition, the electronic control valve of the company E has a structure in which the upper cap and the lower cap are separated by the spring in the bellows, and there is no separate guide member when moving in the vertical direction. There was a disadvantage that the relief reaction slowed down as the pressure leaked into the gap generated.

[Preceding technical literature]

[Patent Documents]

Domestic Publication No. 2011-0040207 (published: 2011.04.20, Name: drive control method of variable displacement swash plate compressor)

The present invention has been made to solve the above problems, the object of the present invention is the crankcase pressure port, the discharge pressure port and the suction pressure port is formed in the valve body, and the crankcase pressure in the discharge pressure port therein A valve portion including a hollow guide opening only one of a first passage connected to the port and a second passage connected from the crankcase pressure port to the suction pressure port, and a solenoid closing the other side of the valve portion; In the electronic control valve is formed so as to be able to adjust the bellows tension to elastically support the guide to the solenoid side by the rotation of the tension control unit for closing one end of the valve portion, variable pressure linearity and control accuracy is improved It is to provide an electronic control valve of a capacity compressor.

Another object of the present invention is that the valve rod disposed inside the bellows is inserted into the through hole formed in the support portion fixed in contact with the inner circumferential surface of the valve body, so that during the relief reaction, the valve rod is horizontally coaxial with the guide without shaking in the vertical direction. It is mobile and provides an electronic control valve for a variable displacement compressor that allows the crankcase pressure to be discharged to the suction pressure port stably and quickly.

The electronic control valve 1 (ECV) of the variable displacement compressor of the present invention is made of a hollow body, and the crankcase pressure port (Cc) so that the crankcase pressure Pc, the discharge pressure Pd, and the suction pressure Ps act respectively. 110, a discharge pressure port 120 and a suction pressure port 130 are formed, one side of the valve body 100 is closed by the tension control unit 710 in the longitudinal direction; A solenoid 200 which closes the other side of the valve body 100 and transfers the plunger 220 and the push rod 230 in a longitudinal direction by a magnetic field formed by a current applied to the coil 210; A first passage 310 fixed to one end of the push rod 230 to communicate with the crankcase pressure port 110 and the inside thereof, and connected to the crankcase pressure port 110 from the discharge pressure port 120; ) And a hollow guide 300 which opens only one of the second passages 320 connected from the crankcase pressure port 110 to the suction pressure port 130; One side extending in the longitudinal direction in the form of a column, the edge is inserted and coupled to the through-hole 510 of the support portion 500 fixed in contact with the inner peripheral surface of the valve body 100, the relief adjustment portion formed on the other side in the longitudinal direction (410) the valve rod 400 is coupled to the inner peripheral surface of the inner space in contact with one side outer peripheral surface in the longitudinal direction of the guide 300; And a bellows 600 elastically supporting the guide 300 toward the solenoid 200 and having the valve rod 400 disposed therein. Characterized in that it is formed to include.

In addition, the electronic control valve 1 is an adjustment nut 720 coupled to one end of the valve rod 400 located in the space between the support part 500 and the tension control part 710, both ends in the longitudinal direction. The tension adjusting unit 710 and the adjustment nut 720 may be formed to include a first spring 730 is an elastic body coupled to.

In addition, the electronic control valve 1 may primarily adjust the tension of the bellows 600 by rotating the adjustment nut 720 before assembling the tension control unit 710.

In addition, the electronic control valve 1 may finely adjust the tension of the bellows 600 by rotating the tension control unit after assembling the tension control unit 710.

In addition, the electronic control valve 1 is coupled to the relief control unit 410 and the guide 300 in a metal contact state, when the relief function, the relief control unit 410 and the guide 300 is instantaneous Separated to the crankcase pressure (Pc) is introduced into the space therebetween can be delivered to the suction pressure port 130.

In addition, the relief valve 1 and the bellows 600 may move in conjunction with the electronic control valve 1 when the relief function is performed.

In addition, the electronic control valve 1 is controlled to move the guide 300 according to the electrical signal applied to the solenoid 200, the guide 300 is moved to the solenoid 200 side to the first When the passage 310 is opened, the discharge pressure Pd is transmitted to the crankcase pressure port 110, and the guide 300 moves to the tension control unit 710 to the second passage 320. When is opened, the crankcase pressure Pc may be transmitted to the suction pressure port 130.

In addition, the electronic control valve 1 may be further provided with a second spring 620 that is an elastic body on the inner circumference of the bellows 600.

Accordingly, the electronic control valve of the variable displacement compressor according to the present invention is formed to enable adjustment of the bellows tension such that the guide is elastically supported toward the solenoid side by rotation of the tension adjusting unit closing one end of the valve unit, thereby reducing pressure linearity and control. Precision can be improved.

In addition, the present invention primarily adjusts the tension of the bellows through the adjustment nut coupled to the end of the valve rod before assembly, and after the assembly by adjusting the tension of the bellows secondly to finely adjust the tension of the bellows, Even if errors occur, they can be compensated and the bellows tension accuracy can be improved.

Through this, the present invention can be adjusted so that even after assembly, the pressure characteristics of the electronic control valve can be located within the specification range of the hysteresis curve.

In addition, the electronic control valve of the variable displacement compressor according to the present invention is inserted into the through-hole formed in the support portion fixed to the valve rod disposed inside the bellows in contact with the inner circumferential surface of the bellows, the vibration in the vertical direction during the relief reaction It is possible to move horizontally on the guide and the coaxial without, through which there is an advantage that the crankcase pressure can be discharged to the suction pressure port stably and quickly.

1 is a cross-sectional view showing an electronic control valve of a conventional variable displacement compressor.

Figure 2 is a cross-sectional view showing another electronic control valve of a conventional variable displacement compressor.

3 is a cross-sectional view showing an electronic control valve of a variable displacement compressor according to the present invention.

Figure 4 is a cross-sectional view showing a state in which the solenoid in the electronic control valve of the variable displacement compressor according to the present invention.

5 is a cross-sectional view showing a state in which the solenoid is off in the electronic control valve of the variable displacement compressor according to the present invention.

6 is a cross-sectional view showing a state in which a relief reaction occurs in the electronic control valve of the variable displacement compressor according to the present invention.

7 and 8 are cross-sectional view showing an electronic control valve of another variable displacement compressor according to the present invention.

Hereinafter, the electronic control valve 1 of the variable displacement compressor according to the present invention as described above will be described in detail with reference to the accompanying drawings.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to an electronic control valve (1) provided in a variable displacement compressor constituting an air conditioner for an automobile and varying the discharge capacity of the refrigerant by controlling the inclination angle of the swash plate by controlling the pressure of the crankcase. The valve body 100, the solenoid 200, the guide 300, the valve rod 400, and the bellows 600 are included. Hereinafter, other components except for the solenoid 200 will be collectively referred to as a valve unit.

First, referring to the configuration of the valve body 100, the valve body 100 is made of a hollow body, the crank chamber pressure (Pc), the discharge pressure (Pd), and the suction pressure (Ps) to act respectively The pressure port 110, the discharge pressure port 120 and the suction pressure port 130 is formed, one side in the longitudinal direction is formed is sealed by the tension control unit 710.

As shown in FIG. 3, the valve body 100 is circumferentially formed with three types of holes formed by the crankcase pressure port 110, the discharge pressure port 120, and the suction pressure port 130 in order from the left side. A plurality of phases may be formed at regular intervals, respectively.

Inside the region where the crankcase pressure port 110 is formed in the valve body 100, a decompression chamber in which the bellows 600 to be described later is located is formed. In addition, a solenoid 200 is provided at the other side in the longitudinal direction of the valve body 100, and the tension control unit 710 and the solenoid 200 are sealed at both sides in the longitudinal direction of the valve body 100.

The solenoid 200 is connected to the push rod 230 and move integrally, the plunger 220 made of a magnetic material, and the fixing core 240 is another magnetic material fixed to one side of the plunger 220, A coil 210 provided around the plunger 220 and the fixed core 240 to form a magnetic field according to an amount of current controlled from a separate controller (not shown), and a plate 250 accommodating the coil 210. And a housing 260.

When the solenoid 200 is turned on, a magnetic field is formed so that the plunger 220 and the push rod 230 move horizontally to the left side as shown in FIG. 4, and when the solenoid 200 is turned off, the bellows 600 is turned off. As shown in FIG. 5, the plunger 220 and the push rod 230 are horizontally moved to the right by the elastic force.

The guide 300 is fixed to one end of the push rod 230 to move horizontally left and right according to the on / off of the solenoid 200, the movement direction is the same in conjunction with the movement of the push rod 230. .

The guide 300 is in the form of a hollow pipe, a communication path 330 for communicating the inside and the outside on one side in the longitudinal direction is formed so that the inside of the crankcase pressure port 110 and the guide 300 Allow communication.

In addition, the guide 300 is the other side in the longitudinal direction is coupled to the end of the push rod 230, even when coupled with the push rod 230 is formed to enable the longitudinal flow of the refrigerant therebetween, this To this end, a separate flow path forming unit may be further mounted between the inner circumferential surface of the guide 300 and the outer circumferential surface of the push rod 230.

In this case, the guide 300 may be formed in a separate structure of the area in which the communication path 330 is formed, and the communication path 330 inside the first guide 301 coupled to the push rod 230. A portion of the portion of the second guide 302 where the) is formed may be inserted and coupled.

On the other hand, the guide 300 is in close contact with the inner circumferential surface of the valve body 100 is slidingly moved in the longitudinal direction, through which the first connection from the discharge pressure port 120 to the crank chamber pressure port 110 Only one of the passage 310 and the second passage 320 connected to the suction pressure port 130 from the crankcase pressure port 110 is opened.

As shown in FIG. 4, when the solenoid 200 is turned on and the push rod 230 is moved to the left side, the guide 300 is also moved to the left side, whereby the discharge pressure port 120 is moved. It is closed and the second passage 320 is opened.

In addition, as shown in FIG. 5, when the solenoid 200 is turned off and the push rod 230 moves to the right side, the guide 300 also moves to the right side, through which the suction pressure port 130 is moved. ) Is closed and the first passage 310 is opened.

Next, the valve rod 400 extends in the longitudinal direction and is formed in a columnar shape, and the valve rod 400 is formed in the through hole 510 of the support part 500 fixed to the inner circumferential surface of the valve body 100. One side is inserted in the longitudinal direction of

The other side of the valve rod 400 is formed with a relief adjustment unit 410 is coupled in contact with the outer peripheral surface of one side in the longitudinal direction of the guide 300, that is, the outer edge of the end portion of the second guide 302.

Particularly, the relief adjustment unit 410 has a predetermined space therein, and the outer edge of the end portion of the second guide 302 is in contact with the inner circumferential surface, and moves to the left in the drawing as if sliding in the relief reaction. And a crankcase pressure Pc enters through the inner flow path of the guide 300 to exit the suction pressure port 130.

Next, the bellows 600 is provided in the decompression chamber formed inside the crankcase pressure port 110, and is hollowly formed to be corrugated with a thin thin metal material.

One end in the longitudinal direction of the bellows 600 is coupled to the support 500, the other end is coupled to the relief adjustment portion 410 of the valve rod 400, accordingly the bellows 600 and the relief adjustment The unit 410 may be interlocked with each other.

In addition, the bellows 600 is the other end is coupled to the relief control unit 410, the relief control unit 410 is coupled to one end of the guide 300, the guide 300 to the solenoid ( 200) is elastically supported to the side.

In addition, a second spring 620 may be additionally provided at an inner circumference of the bellows 600, whereby the second spring 620 together with the bellows 600 moves the guide 300 to the solenoid. The elastically supporting force to the 200 side may be complemented.

In particular, the electronic control valve 1 of the variable displacement compressor according to the present invention is the control nut 720 is coupled to one end of the valve rod 400 located in the space between the support 500 and the tension control 710. And, both ends in the longitudinal direction may be formed by further comprising a first spring 730, which is an elastic body coupled in contact with the tension control unit 710 and the adjustment nut 720.

The electronic control valve 1 may first adjust the tension of the bellows 600 by rotating the adjustment nut 720 before assembling the tension control unit 710. That is, the solenoid 200 is reduced by the bellows 600 when the valve rod 400 is finely moved to the left in the drawing because the control nut 720 is further tightened. ), The load repelling force for the () increases, the load of the solenoid 200 increases.

In addition, the bellows 600 is further extended when the valve rod 400 is slightly moved to the right in the drawing because the control nut 720 is further loosened so that the solenoid 200 is increased. The load repulsion force against the is reduced, the load of the solenoid 200 is reduced.

In addition, the electronic control valve 1 may finely adjust the tension of the bellows 600 by rotating the tension control part even after assembling the tension control part 710.

The tension control unit 710, the movement is different depending on whether the right or left screw, but when tightened, the force is further applied to the first spring 730, when released, the first spring 730 Explaining an example of less force applied to

The electronic control valve 1 is further tightened by the tension control unit 710 when the valve rod 400 is slightly moved to the right in the drawing, the bellows 600 is elongated by a certain length, through which the solenoid 200 ), The load repelling force for the () increases, the load of the solenoid 200 increases.

In addition, the bellows 600 is further reduced when the valve rod 400 is slightly moved to the left side of the drawing because the tension control unit 710 is further loosened, so that the solenoid 200 is reduced. The load repulsion force against the is reduced, the load of the solenoid 200 is reduced.

Accordingly, the present invention can compensate for this even if an error occurs in the dimensions of the bellows 600, it is possible to improve the tension precision of the bellows 600. That is, the present invention can be adjusted so that the pressure characteristic of the solenoid valve 1 can be located within the specification range of the hysteresis curve even after assembly.

In another embodiment, as shown in FIG. 7, the electronic control valve 1 includes a valve body support 501 to which the support 500 is fixed to contact an inner circumferential surface of the valve body 100, and the valve body. Inserted into the space between the support 501 and the valve rod 400, a thread is formed on the outer circumferential surface may be formed to include an auxiliary tension adjusting unit 502 is screwed to the valve body support 501.

At this time, the electronic control valve (1) is to adjust the tension of the bellows 600 primarily by rotating the auxiliary tension control unit 502, before assembling the tension control unit 710, the adjustment nut ( 720 may only be used in a configuration that supports the first spring.

In another embodiment, as shown in FIG. 8, the valve rod 400 of the electronic control valve 1 extends in the longitudinal direction and has one side formed in a column shape, and an edge thereof is an inner circumferential surface of the valve body 100. The inner space of the relief adjustment unit 410 is inserted into the rod insertion hole 711 of the tension control unit 710 inserted into and coupled to the through hole 510 of the support unit 500 fixed in contact with each other. The outer circumferential surface of the one side in the longitudinal direction of the guide 300 may be formed in contact with the inner circumferential surface of the guide.

In this case, the tension control of the bellows 600 can be adjusted by rotating the tension control unit 710 after the assembly of the electronic control valve 1 is completed.

Hereinafter, the operation of the electronic control valve 1 according to the present invention having the configuration as described above will be described.

First, FIG. 4 and FIG. 5 show a state in which the solenoid 200 is turned on, and FIG. 5 shows that the solenoid 200 is turned on when the cooling load is general, that is, when the air conditioner is normally operated without being overloaded. It is off.

Referring to the state in which the solenoid 200 is off first, the plunger 220 and the push rod 230 are moved to the right in the drawing, and the guide 300 connected to the end of the push rod 230 is right. The bellows 600 and the second spring 620 is elastically extended while moving together.

At this time, the discharge pressure port 120 is opened while the inner circumferential surface of the valve body 100 and the outer circumferential surface of the guide 300 in the region where the discharge pressure port 120 is formed, and the right side of the guide 300 is opened. The suction pressure port 130 is closed as an end thereof comes into contact with the fixing core 240 of the solenoid 200.

Through this, the crankcase pressure port 110 connected to the crank chamber of the variable displacement compressor and the discharge pressure port 120 communicate with each other through the decompression chamber, whereby a portion of the refrigerant is discharged from the discharge pressure port 120 having a high pressure. Moves to the crankcase pressure port 110 so that the pressure inside the crankcase is controlled.

Through this process, as the discharge pressure Pd is introduced into the crank chamber, the internal pressure of the crank chamber becomes larger than the pressure of the suction pressure port 130, so that the swash plate slope of the variable displacement compressor is reduced.

Subsequently, when the solenoid 200 is turned on, the bellows 600 and the second spring 620 elastically contract as the plunger 220 and the push rod 230 move to the left side of the drawing.

At this time, the discharge pressure port 120 is closed while the inner peripheral surface of the valve body 100 and the outer peripheral surface of the guide 300 in a region where the discharge pressure port 120 is formed, and the right end of the guide 300 is closed. The suction pressure port 130 is opened while being spaced apart from the fixed core 240 of the solenoid 200.

As a result, the crankcase pressure Pc port connected to the crankcase of the variable displacement compressor and the suction pressure port 130 communicate with each other through the decompression chamber and the guide 300, thereby providing the crankcase pressure port 110. The refrigerant from) is sent to the suction pressure port 130.

Through this operation, the electronic control valve 1 controls the crankcase pressure Pc of the variable displacement compressor to adjust the amount of refrigerant discharged by adjusting the inclination angle of the swash plate.

Next, FIG. 6 is a relief function of quickly discharging the liquid refrigerant filled in the crankcase to the suction pressure port 130 in order to quickly start the air conditioner operation, ie, cooling, which starts or stops the vehicle. A diagram showing a state in which a reaction occurs.

At this time, the plunger 220 is moved to the left side in the drawing while a constant current controlled by the controller is supplied to the coil 210 of the solenoid 200.

When the inner circumferential surface of the valve body 100 and the outer circumferential surface of the guide 300 in the region where the discharge pressure port 120 is formed are maintained at a constant interval, the right end of the guide 300 is the solenoid 200. The suction pressure port 130 is opened while being spaced apart from the fixed core 240 of the, and the suction pressure Ps is continuously applied to the relief control unit 410, and the suction pressure Ps becomes more than a metal. A slight gap is generated between the relief adjustment part 410 and the guide 300 part which are in contact, and the crankcase pressure Pc in the decompression chamber is instantaneously entered through the gap to enter the inside of the guide 300. It exits to the suction pressure port 130 via a flow path.

Accordingly, as the inclination of the swash plate increases, it is possible to secure the maximum variable capacity, and as a result, the air conditioner performance can be exerted with the maximum variable capacity at the same time as the air conditioner is operated, thereby providing rapid cooling.

Of course, if the room becomes cool after a predetermined time elapses after the air conditioner is activated, the current supplied to the coil 210 is gradually reduced and then blocked by the control of the controller, and the solenoid 200 is turned off to a state as shown in FIG. 5. Is switched.

In particular, the electronically controlled valve 1 of the variable displacement compressor according to the present invention has a valve rod 400 disposed inside the bellows 600 formed on the support part 500 fixed in contact with the inner circumferential surface of the valve body 100. By being inserted into the through hole 510, during the relief reaction, horizontal movement is possible in the coaxial direction with the guide 300 without shaking in the vertical direction, whereby the crankcase pressure Pc is stable to the suction pressure port 130. And it has the advantage that it can be discharged quickly.

In addition, the electronic control valve (1) of the variable displacement compressor according to the present invention by the rotation of the tension control unit 710 closing one end of the valve portion, the bellows to elastically support the guide 300 to the solenoid (200) ( 600) By being formed to allow the tension adjustment, the pressure linearity and the precision of the control can be improved.

That is, the present invention primarily adjusts the tension of the bellows 600 through the adjusting nut 720 coupled to the end of the valve rod 400 before assembly, and rotates the tension adjusting unit 710 after assembly. By finely adjusting the tension of the bellows 600, even if an error occurs in the dimensions of the bellows 600, it can be compensated for, and the tension precision of the bellows 600 can be improved.

Through this, the present invention can be adjusted so that even after assembly, the pressure characteristics of the electronic control valve 1 can be located within the specification range of the hysteresis curve.

The present invention is not limited to the above-described embodiments, and the scope of application of the present invention is not limited to those of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made.

[Description of the code]

1: Electronic control valve of variable capacity compressor

100: valve body

110: crankcase pressure port 120: discharge pressure port

130: suction pressure port

Pc: crankcase pressure Pd: discharge pressure

Ps: suction pressure

200: solenoid

210: coil 220: plunger

230: push rod 240: fixed core

250: plate 260: housing

300: Guide

301: first guide 302: second guide

310: first passage 320: second passage

330: communication path

400: valve rod 410: relief adjustment unit

500: support portion 510: through hole

600: bellows 620: second spring

710: tension control unit 720: adjustment nut

730: the first spring

Claims

In the electromagnetic control valve 1 (ECV) of the variable displacement compressor,

It is made of a hollow body, the crankcase pressure port 110, the discharge pressure port 120 and the suction pressure port 130 so that the crankcase pressure (Pc), the discharge pressure (Pd), and the suction pressure (Ps) act respectively It is formed, one side in the longitudinal direction is closed by the tension control unit 710 valve body 100;

A solenoid 200 which closes the other side of the valve body 100 and transfers the plunger 220 and the push rod 230 in a longitudinal direction by a magnetic field formed by a current applied to the coil 210;

A first passage 310 fixed to one end of the push rod 230 to communicate with the crankcase pressure port 110 and the inside thereof, and connected to the crankcase pressure port 110 from the discharge pressure port 120; ) And a hollow guide 300 which opens only one of the second passages 320 connected from the crankcase pressure port 110 to the suction pressure port 130;

One side extending in the longitudinal direction in the form of a column, the edge is inserted and coupled to the through-hole 510 of the support portion 500 fixed in contact with the inner peripheral surface of the valve body 100, the relief adjustment portion formed on the other side in the longitudinal direction (410) the valve rod 400 is coupled to the inner peripheral surface of the inner space in contact with one side outer peripheral surface in the longitudinal direction of the guide 300; And

A bellows 600 elastically supporting the guide 300 toward the solenoid 200 and having the valve rod 400 disposed therein; Electronic control valve of a variable displacement compressor, characterized in that it is formed.
The method of claim 1,

The electronic control valve 1

An adjustment nut 720 coupled to one end of the valve rod 400 positioned in the space between the support part 500 and the tension control part 710;

An electronic control valve of a variable displacement compressor, characterized in that the both ends are formed in the longitudinal direction including a first spring (730) is an elastic body coupled to contact with the tension control unit (710) and the adjustment nut (720).
The method of claim 2,

The electronic control valve 1

Before assembling the tension control unit 710, the control nut 720 is rotated electronically control valve of the variable displacement compressor, characterized in that to primarily adjust the tension of the bellows (600).
The method of claim 3, wherein

The electronic control valve 1

After assembling the tension control unit 710, by rotating the tension control unit 710 to finely adjust the tension of the bellows 600,

The tension control unit 710 is an electronic control valve of a variable displacement compressor, characterized in that the screw.
The method of claim 2,

The electronic control valve 1

A valve body support portion 501 to which the support portion 500 is fixed in contact with an inner circumferential surface of the valve body 100;

Inserted into the space between the valve body support 501 and the valve rod 400, the thread is formed on the outer peripheral surface is formed to include an auxiliary tension adjusting unit 502 is screwed with the valve body support 501 Solenoid valve for variable displacement compressors.
The method of claim 1,

The electronic control valve 1

The relief control unit 410 and the guide 300 are coupled in a metal contact state,

When the relief function is performed, the relief control unit 410 and the guide 300 is instantaneously separated, the crankcase pressure (Pc) is introduced into the space therebetween is variable, characterized in that the transfer to the suction pressure port 130 Electronically controlled valve for displacement compressors.
The method of claim 6,

The electronic control valve 1

When the relief function is performed, the relief control unit 410 and the bellows 600, the electronic control valve of the variable displacement compressor, characterized in that the movement.
The method of claim 1,

The electronic control valve 1

The movement direction of the guide 300 is adjusted according to the electrical signal applied to the solenoid 200,

When the guide 300 moves toward the solenoid 200 to open the first passage 310, the discharge pressure Pd is transmitted to the crankcase pressure port 110.

When the guide 300 is moved to the tension control unit 710 side when the second passage 320 is opened, the crankcase pressure (Pc) is characterized in that the transfer to the suction pressure port 130 Electronically controlled valve for displacement compressors.
The method of claim 1,

The electronic control valve 1

Electronic control valve of a variable displacement compressor, characterized in that the second spring (620) is further provided on the inner circumference of the bellows (600).
In the electromagnetic control valve 1 (ECV) of the variable displacement compressor,

It is made of a hollow body, the crankcase pressure port 110, the discharge pressure port 120 and the suction pressure port 130 so that the crankcase pressure (Pc), the discharge pressure (Pd), and the suction pressure (Ps) act respectively It is formed, one side in the longitudinal direction is closed by the tension control unit 710 valve body 100;

A solenoid 200 which closes the other side of the valve body 100 and transfers the plunger 220 and the push rod 230 in a longitudinal direction by a magnetic field formed by a current applied to the coil 210;

A first passage 310 fixed to one end of the push rod 230 to communicate with the crankcase pressure port 110 and the inside thereof, and connected to the crankcase pressure port 110 from the discharge pressure port 120; ) And a hollow guide 300 which opens only one of the second passages 320 connected from the crankcase pressure port 110 to the suction pressure port 130;

One side extending in the longitudinal direction in the form of a column, the insertion of the rod of the tension adjusting part 710 is inserted into the through hole 510 of the support portion 500 is fixed to the edge contact the inner peripheral surface of the valve body 100 A valve rod 400 inserted into the hole 711 and coupled to an inner circumferential surface of the relief adjusting unit 410 formed at the other side in the longitudinal direction and in contact with an outer circumferential surface of the side in the longitudinal direction of the guide 300; And

A bellows 600 elastically supporting the guide 300 toward the solenoid 200 and having the valve rod 400 disposed therein; Electronic control valve of a variable displacement compressor, characterized in that it is formed.
The method of claim 10,

The electronic control valve 1

After assembling the tension control unit 710, by rotating the tension control unit 710, the electronic control valve of the variable capacity compressor, characterized in that to finely adjust the tension of the bellows (600).