KR101864881B1 - Control valve of variable displacement compressor and its variable displacement compressor - Google Patents

Control valve of variable displacement compressor and its variable displacement compressor Download PDF

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Publication number
KR101864881B1
KR101864881B1 KR1020160097393A KR20160097393A KR101864881B1 KR 101864881 B1 KR101864881 B1 KR 101864881B1 KR 1020160097393 A KR1020160097393 A KR 1020160097393A KR 20160097393 A KR20160097393 A KR 20160097393A KR 101864881 B1 KR101864881 B1 KR 101864881B1
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KR
South Korea
Prior art keywords
port
valve body
pressure
chamber
crank chamber
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Application number
KR1020160097393A
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Korean (ko)
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KR20180013537A (en
Inventor
국무성
홍태호
황성환
강동수
박장식
Original Assignee
동일기계공업 주식회사
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Application filed by 동일기계공업 주식회사 filed Critical 동일기계공업 주식회사
Priority to KR1020160097393A priority Critical patent/KR101864881B1/en
Priority to PCT/KR2017/007986 priority patent/WO2018021793A1/en
Publication of KR20180013537A publication Critical patent/KR20180013537A/en
Application granted granted Critical
Publication of KR101864881B1 publication Critical patent/KR101864881B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14—Control
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804—Controlled by crankcase pressure
    • 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
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

The present invention relates to a control valve for a variable capacity compressor and a variable capacity compressor having the same, wherein a first port communicating with a crank chamber of a variable capacity compressor is formed at one side and a second port communicated with a discharge chamber of the variable capacity compressor, And a third port communicating with the suction chamber of the variable capacity compressor is formed on the other side of the body; A valve body installed in the accommodation space and having a valve portion for adjusting a clearance gap between the first port and the second port; A solenoid for generating a magnetic force corresponding to an amount of current to be supplied and causing the valve element to move back and forth; And a pressure sensor for correcting a displacement in which at least a part of the pressure chamber is contracted or contracted in accordance with a pressure change of the suction chamber communicated through the third port and the part is in contact with a part of the valve body, Wherein the first port includes a first port communicated with a first passage formed in the discharge chamber in the direction of the crank chamber and a second port formed in the direction of the suction chamber in the crank chamber, And a one-way valve body for controlling the amount of opening of the first and second ports communicating with the second passage by the pressure difference between the first and second ports and the first port Can be installed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a control valve for a variable capacity compressor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control valve for a variable capacity compressor and a variable capacity compressor having the same. More particularly, the present invention relates to a control valve for controlling the capacity of a variable capacity compressor and a variable capacity compressor having the same.

The variable displacement compressor used in the vehicle air conditioning system operates by driving the engine. However, if the operation of the compressor is restricted by the number of revolutions of the engine, the capacity of the compressor is also influenced by the number of revolutions of the engine. Then, since the cooling capability of the vehicle is determined by the number of revolutions of the engine, a great difficulty arises in controlling the cooling capability.

In order to overcome this problem, a variable displacement compressor has been developed and used for varying the discharge capacity of the refrigerant and obtaining an appropriate cooling capacity without being restricted by the engine speed.

Generally, the variable displacement compressor includes an airtightly formed crank chamber and a swash plate installed in the crank chamber and rotated by the rotation shaft of the engine. During the operation of the variable capacity compressor, the inclination angle of the swash plate with respect to the rotation axis is variable. When the swash plate is rotated in an inclined state, the swash plate performs the swing motion, and the piston connected to the swash plate moves linearly by the rotation and swing motion of the swash plate, compressing the refrigerant flowing in the suction chamber communicating with the evaporator side And then discharged to the discharge chamber communicated with the condenser side. The inclination angle of the swash plate changes according to the pressure change of the crank chamber, and the discharge amount of the refrigerant changes according to the inclination angle of the swash plate.

That is, when the inclination angle of the swash plate is large, the stroke of the piston is long, so the amount of discharged refrigerant is large. When the inclination angle of the swash plate is small, the stroke of the piston is short.

In order to control the refrigerant discharge amount in this manner, the control valve for the variable displacement compressor is controlled so that the pressure in the crank chamber of the variable displacement compressor changes.

A conventional capacity control valve disclosed in Korean Patent Publication No. 933830 includes a valve body and a solenoid, and one side of the valve body and one side of the solenoid are interconnected. Thus, the pressure in the crank chamber of the variable displacement compressor can be varied by adjusting the interval between the fine gaps while the valve body is operated by the solenoid.

On the other hand, when the variable capacity compressor is stopped for a long time, the refrigerant is liquefied and the refrigerant in the liquid state remains in the crankcase. When the variable capacity compressor suddenly operates, the refrigerant in the liquid state in the crank chamber suddenly vaporizes and the pressure in the crankcase becomes excessive There is a problem that it takes a long time until the discharge capacity becomes sufficient after the operation of the variable capacity compressor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a one-way valve body, in which the pressure of the first and second ports communicating with the second passage formed in the direction of the suction chamber from the crank chamber, If the pressure of the first port communicated with the first passage formed in the direction of the crank chamber is higher than the pressure of the first port formed in the direction of the crank chamber, the pressure of the crank chamber can be rapidly lowered by increasing the opening degree of the first- It is possible to improve the operation efficiency and to control the pressure in the crank chamber so as not to be excessive so as to improve the durability of the parts and to prevent the malfunctions. In addition, the valve body and the one- A variable capacity compressor device capable of saving the product unit cost and installation space by assembling it, And a variable capacity compressor having the valve. However, these problems are exemplary and do not limit the scope of the present invention.

According to an aspect of the present invention, there is provided a control valve for a variable capacity compressor, comprising: a first port communicating with a crank chamber of a variable capacity compressor; and a second port communicating with a discharge chamber of the variable capacity compressor, And a third port communicating with the suction chamber of the variable capacity compressor is formed on the other side of the variable capacity compressor, and a housing space is formed therein; A valve body installed in the accommodation space and having a valve portion for adjusting a clearance gap between the first port and the second port; A solenoid for generating a magnetic force corresponding to an amount of current to be supplied and causing the valve element to move back and forth; And a pressure sensor for correcting a displacement in which at least a part of the pressure chamber is contracted or contracted in accordance with a pressure change of the suction chamber communicated through the third port and the part is in contact with a part of the valve body, Wherein the first port includes a first port communicated with a first passage formed in the discharge chamber in the direction of the crank chamber and a second port formed in the direction of the suction chamber in the crank chamber, The port of the first port is increased to increase the degree of opening of the port so that the pressure of the crank chamber is rapidly lowered A one-way valve body may be installed at the port 1-2.

Further, according to the present invention, in the one-way valve body, the one-way valve body is configured such that the amount of electric current supplied to the solenoid and the pressure difference between the first- And a spool that is installed in the body so as to be movable forward and rearward to control the degree of opening.

Also, according to the present invention, when the 1-2 port is opened, a one-way flow path may be formed in the valve body so that the flow path may be formed from the 1-2 port to the third port.

According to the present invention, the valve body can be installed with the valve portion downwardly so that the valve portion can adjust the clearance gap by the repulsive force of the solenoid.

In addition, according to the present invention, the valve body can be installed with the valve portion upwardly so that the valve portion can adjust the clearance gap by the attraction of the solenoid.

In addition, according to the present invention, the spool has an inverted L-shaped cross-section at one end so that the spool has an L-shaped cross section so that the spool can be moved forward and backward. The elastic spring is disposed between the body and the spool The tip of the spool may have an area larger than at least the area of the first and second ports so as to selectively open or close the first and second ports formed in the body.

According to the present invention, the spool may be formed with a guide groove for guiding the valve body so as to prevent swinging inside the body and coaxial with the valve body.

According to another aspect of the present invention, there is provided a variable capacity compressor including a first port communicating with a crank chamber of a variable capacity compressor, and a second port communicating with a discharge chamber of the variable capacity compressor, And a third port communicating with the suction chamber of the variable capacity compressor is formed on the other side of the body; A valve body installed in the accommodation space and having a valve portion for adjusting a clearance gap between the first port and the second port; A solenoid for generating a magnetic force corresponding to an amount of current to be supplied and causing the valve element to move back and forth; And a pressure sensor for correcting a displacement in which at least a part of the pressure chamber is contracted or contracted in accordance with a pressure change of the suction chamber communicated through the third port and the part is in contact with a part of the valve body, Wherein the first port includes a first port communicated with a first passage formed in the discharge chamber in the direction of the crank chamber and a second port formed in the direction of the suction chamber in the crank chamber, And a one-way valve body capable of adjusting the degree of opening according to the differential pressure between the port 1-2 and the port 1-1 and the current applied to the solenoid may be installed.

According to some embodiments of the present invention as described above, the excessive pressure of the crank chamber can be lowered to shorten the startup time, thereby improving the operation efficiency. By controlling the pressure in the crank chamber so as not to be excessive, The valve body and the one-way valve body can be assembled into one body in one body to save the product unit cost and the installation space, and it is possible to improve the assemblability and productivity Effect. Of course, the scope of the present invention is not limited by these effects.

1 is a cross-sectional view showing a non-current state of a control valve for a variable capacity compressor and a variable displacement compressor having the same according to some embodiments of the present invention.
Fig. 2 is an enlarged sectional view showing an enlarged one-way valve body of the control valve for the variable capacity compressor of Fig. 1; Fig.
3 is a cross-sectional view showing a full current state of the control valve for the variable capacity compressor of FIG.
4 is a cross-sectional view showing a current control state of the control valve for the variable capacity compressor of FIG.
5 is a cross-sectional view showing a non-current state of a control valve for a variable capacity compressor according to some other embodiments of the present invention.
6 is a sectional view showing the full current state of the control valve for the variable capacity compressor of Fig.
FIG. 7 is a cross-sectional view showing a current control state of the control valve for the variable capacity compressor of FIG. 5;

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

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

It is to be understood that throughout the specification, when an element such as a film, region or substrate is referred to as being "on", "connected to", "laminated" or "coupled to" another element, It will be appreciated that elements may be directly "on", "connected", "laminated" or "coupled" to another element, or there may be other elements intervening therebetween. On the other hand, when one element is referred to as being "directly on", "directly connected", or "directly coupled" to another element, it is interpreted that there are no other components intervening therebetween do. Like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "under" or "below" can be used herein to describe the relationship of certain elements to other elements as illustrated in the Figures. Relative terms are intended to include different orientations of the device in addition to those depicted in the Figures. For example, if the element is inverted in the figures, the elements depicted as being on the upper surface of the other elements will have a direction on the lower surface of the other elements. Thus, the example "top" may include both "under" and "top" directions depending on the particular orientation of the figure. If the elements are oriented in different directions (rotated 90 degrees with respect to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention should not be construed as limited to the particular shapes of the regions shown herein, but should include, for example, changes in shape resulting from manufacturing.

1 is a cross-sectional view showing a non-current state of a control valve 100 for a variable capacity compressor and a variable displacement compressor 1000 having the same according to some embodiments of the present invention. 2 is an enlarged sectional view showing an enlarged view of the one-way valve body 50 of the control valve 100 for the variable capacity compressor of FIG.

1 and 2, a control valve 100 for a variable capacity compressor according to some embodiments of the present invention includes a main body 10, a valve body 20, a solenoid 30 A pressure sensitive body 40, and a one-way valve body 50. In this case,

For example, as shown in FIG. 1, the body 10 has a first port P1 communicated with a crank chamber C of the variable capacity compressor 1000 at one side thereof, A second port P2 communicating with the discharge chamber D is formed and a third port P3 communicating with the suction chamber S of the variable capacity compressor is formed on the other side, And is capable of receiving the valve body 20, the solenoid 30, the pressure sensitive body 40 and the one-way valve body 50 in the accommodating space, and has sufficient strength And an assembled or integral structure having durability.

The body 10 includes a crank chamber C of the variable capacity compressor 100 in which a rotation axis (not shown) of the engine of the vehicle is located, a crank chamber C of the variable capacity compressor 100 communicating with the evaporator side of the vehicle air conditioner The pressure in the crank chamber (C) can be adjusted by communicating with the suction chamber (S) and the discharge chamber (D) of the variable capacity compressor communicated with the condenser side of the vehicle air conditioner.

The crank chamber C is provided with a swash plate (not shown) rotated by the rotation axis of the engine of the vehicle, and the swash plate is configured such that the inclination angle of the swash plate with respect to the rotation axis varies depending on the pressure change of the crank chamber C. Lt; / RTI >

Here, a plurality of pistons (not shown) are connected to the swash plate. If the inclination angle of the swash plate is large, the stroke of the piston is long due to the swash plate that swings while rotating, so that the discharge amount of the refrigerant is large and if the inclination angle of the swash plate is small, the stroke of the piston is short and the discharge amount of the refrigerant may be small.

More specifically, for example, the body 10 may be made of steel, aluminum, stainless steel, brass or cast iron, or may be an integral shape or an assembly in which a plurality of parts are assembled together. However, the material and shape of the body 10 are not limited thereto, and a wide variety of materials can be applied.

1 and 2, the valve body 20 is installed in the accommodation space, and the valve body 20 is formed in a space between the first port P1 and the second port P2 It may be a kind of movable member in which a valve portion 21 is formed so as to adjust the clearance D and is provided so as to be movable forward and backward.

More specifically, for example, as shown in Figs. 1 and 2, the valve body 20 is configured such that the valve portion 21 adjusts the clearance distance D by the repulsive force of the solenoid 30 The valve portion 21 can be installed in a top-down manner. However, the present invention is not limited thereto, and can be installed in various forms.

1 and 2, when the 1-2 port P1-2 is opened, the second port P1-2 is connected to the third port P3, Directional flow path OP may be formed in the valve body 20 so that the valve body 20 may be formed.

1, the solenoid 30 may be a kind of electromagnet component that generates a magnetic force corresponding to an amount of current supplied to advance the valve body 20 back and forth.

More specifically, for example, the solenoid 30 may include a core and a magnetic material such as a magnetizable plunger installed inside or outside the core.

Accordingly, a magnetic field is generated in the core according to the amount of current applied to the solenoid 30, and the plunger receives the attractive force or the repulsive force by the magnetic field to move back and forth, The gap portion D can be precisely adjusted while the valve portion 21 of the valve body 21 is precisely advanced.

1, at least a part of the pressure sensitive body 40 is elongated or contracted according to a pressure change of the suction chamber S transmitted through the third port P3 , The part of the valve body (20) is contacted with a part of the valve body (20) to compensate the displacement of the valve body (20). For example, the pressure sensitive member 40 may include, for example, a bellows which can expand and contract according to a pressure.

More specifically, for example, as shown in Fig. 1, the pressure sensitive body 40 has one side fixed and the other side contacting the valve body 20 so that the valve body 20 is moved back and forth And may be installed inside the body 10 so as to correct the displacement.

Therefore, the force for adjusting the clearance D is not limited not only by the amount of current supplied to the solenoid 30 but also by the external environment of the vehicle, for example, The refrigerant flows through the third port P3 to retract the pressure sensitive body 40 and apply a correction force to the valve body 20 using the refrigerant, The accurate temperature control of the automobile air conditioner is possible.

Further, for example, a control valve 100 for a variable capacity compressor according to some embodiments of the present invention is provided between the valve body 20 and the body 10 or the solenoid 30, (E1) in which a restoring force is exerted in a direction in which the spring (20) moves away from the solenoid (30).

The elastic spring E1 can always apply a restoring force to the valve body 20. When a large amount of current is applied to the solenoid 30, the valve body 20 urges the elastic spring E1 When the amount of current applied to the solenoid 30 becomes small, the restoring force of the resilient spring E1 causes the valve body 20 to move in the opposite direction The clearance D can be made small or large while being reversed. Accordingly, the clearance D can be controlled by adjusting the amount of current applied to the solenoid 30 while repeating this process.

1 and 2, the one-way valve body 50 is installed in the body 10 and can be opened in one direction in accordance with the pressure of the crank chamber C, It can serve as a kind of check valve.

More specifically, for example, as shown in FIG. 2, the first port (P1) formed in the body (10) includes a first port (P1) formed in the direction of the crank chamber A first port P1-1 communicating with the first passage W1 and a second port W2 communicating with the second passage W2 formed in the direction of the suction chamber S in the crankcase C. [ (P1-2).

1 and 2, the one-way valve body 50 is configured such that the pressure Pc2 of the 1-2 port P1-2 is larger than the pressure P1c of the 1-1 port P1-1 (P1-2) so that the pressure of the crank chamber (C) can be rapidly lowered by increasing the amount of opening of the 1-2 port (P1-2) As shown in FIG.

More specifically, for example, when the full current is supplied to the solenoid 30, the one-way valve body 50 is configured such that the pressure of the 1-2 port P1-2 is higher than the pressure of the 1-1 When the pressure of the solenoid 30 is higher than the pressure of the port P1-1, the solenoid 30 is retracted by the returning force of the elastic spring E2 to open the 1-2 port P1-2 formed in the body 10, When the control current is supplied to the first port P1-1 and the second port P1-2, the control current is supplied from the first port P1-2 to the first port P1-1, And a spool 51 (spool) installed inside the body 10 so as to be able to control the degree of opening of the two ports P1-2.

For example, as shown in FIG. 2, one end face of the spool 51 is formed in an inverted L-shape so that a front end face of the body 10 having an L-shaped end face can be moved back and forth, Like structure in which a through hole is formed.

2, the elastic spring E2 is a coil spring installed between the body 10 and the spool 51. The tip of the spool 51 is connected to the body 10 The second port P1-2 may have an area larger than at least the area of the 1-2 port P1-2 so as to selectively open or close the 1-2 port P1-2 formed in the second port P1-2.

Therefore, the spool 51 is opened at its tip by the differential pressure between the port 1-2 and the port 1-1, When the pressure Pc2 of the first port P1-2 is higher than the pressure Pc1 of the first port P1-1 while controlling the degree of the second port P1-2, Thereby reducing the pressure in the crank chamber C. This improves the operation efficiency by shortening the start time and improves the durability of the parts by controlling the pressure in the crank chamber C so as not to be excessive, And the valve body 20 and the one-way valve body 50 can be assembled into one body 10 in one body to save the product cost and installation space, Can greatly improve.

For example, the spool 51 is formed with a guide groove H for guiding the valve body 20 so as to prevent swinging inside the body 10 and coaxial with the valve body 20 . Therefore, the shaft of the spool 51 and the valve body 20 can be precisely guided using the guide groove H, so that the operation can be accurately and smoothly performed.

FIG. 3 is a cross-sectional view showing the full current state of the control valve 100 for the variable capacity compressor of FIG. 1, and FIG. 4 is a cross-sectional view showing the current control state of the control valve 100 for the variable capacity compressor of FIG.

As shown in FIGS. 1 to 4, the operation of the control valve 100 for a variable capacity compressor according to some embodiments of the present invention will be described. First, as shown in FIGS. 1 and 2, When the solenoid 30 is in a non-current state (I = 0) in which no electric power is applied, when the engine is initially started, the swash plate is turned backward and the first- The pressure Pc2 of the second port P1 is higher than the pressure Pc1 of the port 1-1 of the first port communicating with the first passage W1 and as a result, Way flow path OP between the first port P1-2 and the third port P3 is communicated and the refrigerant flows from the crank chamber C to the suction chamber S, The excessive pressure of the crank chamber (C) can be lowered at the time of starting the engine.

3, when the full current state (I = 1.0 A) in which a full current is applied to the solenoid 30 is applied, the valve body 20 is rotated by the repulsive force of the solenoid 30, The flow path between the first port P1 and the second port P2 is closed and the refrigerant can not flow from the discharge chamber D to the crank chamber C while the valve portion 21 is lowered.

At this time, the pressure Pc1 of the first port P1-1, which is not supplied with the refrigerant, is lowered, and consequently the second port P1-2 The pressure Pc2 of the first port P1-1 is higher than the pressure Pc1 of the port 1-1 of the first port communicating with the first passage W1, Way flow path OP between the port P1-2 and the third port P3 is communicated and the refrigerant flows from the crank chamber C to the suction chamber S, The excessive pressure of the crank chamber (C) can be lowered.

4, when the control current is applied to the solenoid 30, the valve body 20 is controlled by the repulsive force of the solenoid 30 so that the valve 21 is controlled The opening and closing amount of the flow path between the first port P1 and the second port P2 is controlled so that a proper amount of refrigerant can flow from the discharge chamber D to the crank chamber C, . At this time, the one-way valve body 50 is opened and closed by a pressure difference between the pressure Pc2 of the port 1-2 and the pressure Pc1 of the port 1-1, .

Therefore, by using the one-way valve body 50 described above, it is possible to prevent abrupt and excessive pressure rise of the crankcase C in all cases, thereby increasing the operating efficiency and protecting the parts.

FIG. 5 is a cross-sectional view showing a non-current state of a control valve 200 for a variable capacity compressor according to some other embodiments of the present invention, FIG. 6 is a full current state of the control valve 200 for a variable capacity compressor of FIG. And FIG. 7 is a cross-sectional view showing the current control state of the control valve 200 for the variable capacity compressor of FIG.

5 to 7, the valve body 20 of the control valve 200 for variable capacity compressors according to some other embodiments of the present invention is configured such that the valve portion 21 is in contact with the solenoid 30 The valve portion 21 can be installed in a bottom-up manner so that the clearance D can be adjusted by an attractive force.

5 to 7, the operation of the control valve 200 for a variable capacity compressor according to some embodiments of the present invention will be described. First, as shown in FIG. 5, the solenoid 30 (I = 0) in which no electric power is applied to the second port P1-2 while the swash plate is turned back while the engine is initially started, The pressure Pc2 is higher than the pressure Pc1 of the port 1-1 of the first port communicating with the first passage W1 and as a result, Way flow path OP between the second port P1-2 and the third port P3 communicates with the refrigerant flowing from the crank chamber C to the suction chamber S, The excessive pressure of the crank chamber C can be lowered at the time of the initial start of the engine.

6, when the full current state (I = 1.0 A) in which a full current is applied to the solenoid 30 is applied, the valve body 20 is rotated by the solenoid 30, The flow path between the first port P1 and the second port P2 is closed and the refrigerant can not flow from the discharge chamber D to the crank chamber C while the valve portion 21 is lowered.

At this time, the pressure Pc1 of the first port P1-1, which is not supplied with the refrigerant, is lowered, and consequently the second port P1-2 The pressure Pc2 of the first port P1-1 is higher than the pressure Pc1 of the port 1-1 of the first port communicating with the first passage W1, Way flow path OP between the port P1-2 and the third port P3 communicates with the first port P3 so that the refrigerant flows from the crank chamber C to the suction chamber S, The excessive pressure of the crank chamber (C) can be lowered at the time of starting the engine.

7, when the control current is applied to the solenoid 30, the valve body 20 is controlled by the attraction force of the solenoid 30 so that the valve 21 is controlled by the solenoid 30, The opening and closing amount of the flow path between the first port P1 and the second port P2 is controlled so that a proper amount of refrigerant can flow from the discharge chamber D to the crank chamber C, . At this time, the one-way valve body 50 is operated to change the differential pressure between the pressure Pc2 of the port 1-2 and the pressure Pc1 of the port 1-1, The amount of opening can be changed in accordance with the current applied to the electrode.

Therefore, by using the one-way valve body 50 described above, it is possible to prevent abrupt and excessive pressure rise of the crankcase C in all cases, thereby increasing the operating efficiency and protecting the parts.

On the other hand, the present invention can include the variable capacity compressor having the control valve for the variable capacity compressor of the present invention described above.

1, a variable capacity compressor according to some embodiments of the present invention includes a first port P1 communicating with a crank chamber of a variable capacity compressor at one side thereof and a second port P1 connected to a discharge port of the variable capacity compressor at the other side thereof. And a third port (P3) communicating with the suction chamber of the variable capacity compressor is formed on the other side of the second port (P2), and a receiving space is formed in the third port (P3) And a valve unit 21 installed in the space for adjusting the clearance D of the flow path formed between the first port P1 and the second port P2, A solenoid 30 for generating a magnetic force corresponding to an amount of current supplied to the valve body 20 so as to reciprocate the valve body 20 and a solenoid 30 for generating a magnetic force corresponding to a change in pressure of the suction chamber transmitted through the third port P3, At least a portion of which is stretched or contracted, And a pressure sensitive body (40) for contacting the valve body (20) with a part of the valve body (20) so as to correct the forward and backward displacement of the valve body (20) A first port (P1-1) communicating with a first passage (W1) formed in a crank chamber direction, and a 1-2 port (P1-2) formed in the direction of the suction chamber in the crank chamber , When the pressure of the first port (P1-2) is higher than the pressure of the port (P1-1), the second port (P1-2) is opened to increase the pressure of the crank chamber And a control valve 100 for a variable capacity compressor in which a one-way valve body 50 is installed in the first-second port P1-2 so as to lower the pressure of the refrigerant.

Here, the body 10, the valve body 20, the solenoid 30, the pressure sensitive body 40, and the one-way valve body (not shown) of the variable capacity compressor according to some embodiments of the present invention 50 may be the same in construction and function as those of the control valve 100 for variable capacity compression according to various various embodiments of the present invention described above. Therefore, detailed description is omitted.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Body
20: valve body
21:
30: Solenoid
40: Pressure sensitive body
50: One-way valve body
51: spool
100, 200: Control valve for variable capacity compressors
1000: variable capacity compressor

Claims (8)

A first port communicating with a crank chamber of a variable displacement compressor is formed at one side and a second port communicated with a discharge chamber of the variable displacement compressor is formed at the other side thereof and a third port communicated with the suction chamber of the variable displacement compressor is provided on the other side thereof. A body having a receiving space formed therein;
A valve body installed in the accommodation space and having a valve portion for adjusting a clearance gap between the first port and the second port;
A solenoid for generating a magnetic force corresponding to an amount of current to be supplied and causing the valve element to move back and forth; And
A pressure sensor for at least partly extending or contracting in accordance with a pressure change of the suction chamber communicated through the third port and for correcting a displacement in which the part is in contact with a part of the valve body to cause the valve body to move back and forth; Lt; / RTI >
The first port includes a first port communicating with a first passage formed in the discharge chamber in the direction of the crank chamber and a first port communicating with a second passage formed in the direction of the suction chamber from the crank chamber, Port,
A one-way valve body for controlling the amount of opening of the first and second ports communicating with the second passage is provided by the pressure difference between the ports 1-2 and 1-1,
Wherein the one-
And controls the opening degree of the first-second port by the amount of electric current supplied to the solenoid and the differential pressure between the first-second port and the first-port, And a spool which is installed in the body so as to be able to advance and retreat so that the pressure of the crank chamber can be lowered by opening the port 1-2 when the pressure of the first port is higher than the pressure of the first port. . delete The method according to claim 1,
Wherein a one-way flow path is formed in the valve body so that a flow path can be formed from the 1-2 port to the third port when the 1-2 port is opened. The method according to claim 1,
Wherein the valve body is provided with the valve portion downwardly so that the valve portion can adjust the clearance gap by the repulsive force of the solenoid. The method according to claim 1,
Wherein the valve body is installed with the valve portion upwardly so that the valve portion can adjust the clearance gap by the attraction of the solenoid. The method according to claim 1,
The spool has an inverted L-shaped cross section at one end thereof so that the one end face is L-shaped in the body,
The elastic spring is a coil spring installed between the body and the spool,
Wherein the tip of the spool has an area larger than at least the area of the port 1-2 so as to selectively open or close the port 1-2 of the body. The method according to claim 1,
The spool
Wherein a guide groove for guiding the valve body is formed so as to prevent swinging inside the body and coaxial with the valve body. A first port communicating with a crank chamber of a variable displacement compressor is formed at one side and a second port communicated with a discharge chamber of the variable displacement compressor is formed at the other side thereof and a third port communicated with the suction chamber of the variable displacement compressor is provided on the other side thereof. A body having a receiving space formed therein;
A valve body installed in the accommodation space and having a valve portion for adjusting a clearance gap between the first port and the second port;
A solenoid for generating a magnetic force corresponding to an amount of current to be supplied and causing the valve element to move back and forth; And
A pressure sensor for at least partly extending or contracting in accordance with a pressure change of the suction chamber communicated through the third port and for correcting a displacement in which the part is in contact with a part of the valve body to cause the valve body to move back and forth; Lt; / RTI >
The first port includes a first port communicating with a first passage formed in the discharge chamber in the direction of the crank chamber and a first port communicating with a second passage formed in the direction of the suction chamber from the crank chamber, Port,
A one-way valve body for controlling the amount of opening of the first and second ports communicating with the second passage is provided by the pressure difference between the ports 1-2 and 1-1,
Wherein the one-
And controls the opening degree of the first-second port by the amount of electric current supplied to the solenoid and the differential pressure between the first-second port and the first-port, And a spool which is installed in the body so as to be capable of moving back and forth so that the pressure of the crank chamber can be lowered by opening the port 1-2 when the pressure of the first port is higher than the pressure of the first port.
KR1020160097393A 2016-07-29 2016-07-29 Control valve of variable displacement compressor and its variable displacement compressor KR101864881B1 (en)

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KR1020160097393A KR101864881B1 (en) 2016-07-29 2016-07-29 Control valve of variable displacement compressor and its variable displacement compressor
PCT/KR2017/007986 WO2018021793A1 (en) 2016-07-29 2017-07-25 Control valve for variable displacement compressor, and variable displacement compressor having same

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101139062B1 (en) * 2004-10-22 2012-04-30 가부시키가이샤 테지케 Control valve for variable displacement compressor
KR101446438B1 (en) * 2013-05-21 2014-10-07 주식회사 엘티씨 Capacity control valve of variable displacement compressor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006112417A (en) * 2004-09-16 2006-04-27 Tgk Co Ltd Control valve for variable displacement compressor
JP5467184B2 (en) * 2009-04-15 2014-04-09 株式会社テージーケー Control valve for variable capacity compressor
KR101322404B1 (en) * 2012-01-19 2013-10-28 (주)대정고분자산업 Electric control valve for variable displacement compressor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101139062B1 (en) * 2004-10-22 2012-04-30 가부시키가이샤 테지케 Control valve for variable displacement compressor
KR101446438B1 (en) * 2013-05-21 2014-10-07 주식회사 엘티씨 Capacity control valve of variable displacement compressor

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