EP2784320B1 - Soupape de contrôle pour compresseur de déplacement variable - Google Patents

Soupape de contrôle pour compresseur de déplacement variable Download PDF

Info

Publication number
EP2784320B1
EP2784320B1 EP14160650.9A EP14160650A EP2784320B1 EP 2784320 B1 EP2784320 B1 EP 2784320B1 EP 14160650 A EP14160650 A EP 14160650A EP 2784320 B1 EP2784320 B1 EP 2784320B1
Authority
EP
European Patent Office
Prior art keywords
valve
sub
main valve
pressure
valve element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14160650.9A
Other languages
German (de)
English (en)
Other versions
EP2784320A3 (fr
EP2784320A2 (fr
Inventor
Masaaki Tonegawa
Hidekazu Sakakibara
Ryouta Sugamura
Shinji Saeki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TGK Co Ltd
Original Assignee
TGK Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TGK Co Ltd filed Critical TGK Co Ltd
Publication of EP2784320A2 publication Critical patent/EP2784320A2/fr
Publication of EP2784320A3 publication Critical patent/EP2784320A3/fr
Application granted granted Critical
Publication of EP2784320B1 publication Critical patent/EP2784320B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F04B27/1804—Controlled by crankcase pressure
    • F04B2027/1809—Controlled pressure
    • F04B2027/1813—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
    • F04B27/1804—Controlled by crankcase pressure
    • F04B2027/1822—Valve-controlled fluid connection
    • F04B2027/1827—Valve-controlled fluid connection between crankcase and discharge chamber
    • 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
    • F04B2027/1822—Valve-controlled fluid connection
    • F04B2027/1831—Valve-controlled fluid connection between crankcase and suction chamber
    • 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
    • F04B2027/1863—Controlled by crankcase pressure with an auxiliary valve, controlled by
    • F04B2027/1877—External parameters

Definitions

  • the present invention relates to a control valve that is suitable for controlling the discharging capacity of a variable displacement compressor.
  • An automotive air conditioner generally includes a compressor, a condenser, an expander, an evaporator, and so forth.
  • the compressor discharges a high-temperature and high-pressure gaseous refrigerant produced by compressing a refrigerant flowing through a refrigeration cycle of a vehicle.
  • the condenser condenses the gaseous refrigerant.
  • the expander produces a low-temperature and low-pressure refrigerant by adiabatically expanding the condensed liquid refrigerant.
  • the evaporator evaporates the refrigerant and thereby causes a heat exchange of the refrigerant with air inside a vehicle's compartment.
  • the refrigerant evaporated by the evaporator is again brought back to the compressor and thus circulates through the refrigeration cycle.
  • crank pressure Pc The pressure within this crankcase (hereinafter referred to as “crank pressure") Pc is controlled by a control valve for a variable displacement compressor (hereinafter referred to simply as “control valve” also), which is provided between the discharge chamber and the crankcase of the compressor.
  • control valve for a variable displacement compressor
  • Such a control valve regulates the valve opening degree by supplying the externally applied current to a solenoid, which functions as a driver part.
  • a valve section is set to a closed state by supplying the maximum current to the solenoid, for instance.
  • the wobble plate is tilt relative to the rotational shaft for a large angle by lowering a crank pressure Pc.
  • the compressor can be operated at the maximum capacity.
  • the compressor can be operated at the minimum capacity by fully opening the valve section with the solenoid turned off and by setting the wobble plate substantially at a right angle to the rotational shaft with the crank pressure Pc set high.
  • control valve like this is disclosed in Reference (1) in the following Related Art List, for instance. That is, the control valve is provided with a main valve in a main passage that communicates the discharge chamber with the crankcase and also a sub-valve in a sub-passage that communicates the crankcase with a suction chamber. And the main valve and the sub-valve are driven by a single solenoid. During a steady operation, this control valve regulates the opening degree of the main valve with the sub-valve closed. Thereby, the crank pressure Pc can be controlled and the discharging capacity can also be controlled as described above. On the other hand, at a power-on of the air conditioner, the sub-valve is open with the main valve closed. Thereby, the crank pressure Pc is quickly lowered.
  • the compressor can relatively promptly shift its operation mode to a maximum-capacity operation.
  • a plurality of valves are opened and closed by the use of a single solenoid.
  • the control valve can be of a reduced size as a whole.
  • the main valve and sub-valve are driven by the single solenoid.
  • a main valve element and a sub-valve element are provided along the same axis line, and the control valve has a mechanism that transports the solenoidal force to the each valve element by way of an actuating rod provided along said axis line.
  • the body of the control valve has a main valve hole, and the main valve element has a sub-valve hole. That is, the sub-passage runs through the main valve element.
  • the main valve element touches and leaves a main valve seat, provided in an opening end of the main valve hole, so as to close and open the main valve, respectively.
  • the sub-valve element touches and leaves a sub-valve seat, provided in an opening end of the sub-valve hole, so as to close and open the sub-valve, respectively.
  • the sub-valve is pressed against the sub-valve seat during a steady operation of the compressor and thereby the sub-valve is kept closed.
  • the solenoidal force is at its maximum and the sub-valve element is further biased in a valve opening direction while the main valve element is seated on the main valve seat. This opens the sub-valve.
  • the present invention has been made in view of the foregoing problems, and a purpose thereof is to obtain a large flow rate of refrigerant, at the time the sub-valve is open, in a control valve where a main valve and a sub-valve are driven by a single solenoid.
  • the sub-valve has a larger inclination of the valve opening characteristics indicating the relation between the uplift amount and an area of valve opening.
  • a large flow rate of refrigerant can be obtained at the time the sub-valve is open and therefore a starting property of the compressor can be improved.
  • the area of opening of the main valve relative to the uplift amount of the main valve element can be relatively finely regulated and the valve opening characteristic of the main valve can be stably kept. Hence, the control of the discharging capacity of the compressor can be accurately maintained.
  • FIG. 1 is a cross-sectional view showing a structure of a control valve according to a first embodiment.
  • the control valve 1 is cofigured as a so-called Ps sensing valve that controls the flow rate of refrigerant introduced from the discharge chamber to the crankcase so that a suction pressure Ps of the compressor can be maintained at a certain set pressure. Note here that the suction pressure Ps thereof corresponds to "pressure-to-be-sensed".
  • the control valve 1 is configured by integrally assembling a valve unit 2 and a solenoid 3.
  • a main passage, which communicates the port 14 with the port 16, and a sub-passage, which communicates the port 16 with the port 18 are formed inside the body 5.
  • the main valve of small diameter is provided in the main passage, whereas the sub-valve of large diameter is provided in the sub-passage.
  • the sub-valve is disposed coaxially with the main valve further downward from the main valve, namely, on a side closer to the solenoid 3 than the main valve.
  • the control valve 1 is configured such that the power element 6, the main valve, the sub-valve, and the solenoid 3 are arranged in this order starting from one end side of the body 5.
  • a main valve hole 20 and a main valve seat 22 are provided in the main passage.
  • a sub-valve hole 32 and a sub-valve seat 34 are provided in the sub-passage.
  • a pressure chamber 23, partitioned in an upper portion of the body 5, and the suction chamber are communicated with each other. And the refrigerant at the suction pressure Ps is led into the pressure chamber 23 through the port 12.
  • the power element 6 is disposed in the pressure chamber 23.
  • the refrigerant at a discharge pressure Pd is introduced from the discharge chamber.
  • the refrigerant at a crank pressure Pc having passed through the main valve is led out toward the crankcase during a steady operation of the compressor.
  • the refrigerant at the crank pressure Pc discharged from the crankcase is led in at a startup of the compressor. At this time, the thus led-in refrigerant is introduced to the sub-valve.
  • the refrigerant at the suction pressure Ps is led in during a steady operation of the compressor and, on the other hand, the refrigerant at the suction pressure Ps having passed through the sub-valve is led out toward the suction chamber at a startup of the compressor.
  • the main valve hole 20 and the sub-valve hole 32 are formed coaxially with each other, and a pressure chamber 24, which is disposed between the main valve hole 20 and the sub-valve hole 32, communicates with the port 16.
  • a guiding passage 25 (functioning as a "first guiding passage”) is provided between the port 14 and the pressure chamber 23.
  • a guiding passage 26 (functioning as a "second guiding passage") is provided between the port 14 and the port 16.
  • a guiding passage 27 (functioning as a "third guiding passage”) is provided between the port 16 and the port 18.
  • a sub-valve element 36 of stepped cylindrical shape is slidably inserted to these guiding passages.
  • the guiding passage 26 is formed such that the size (diameter) thereof is slightly larger than that of the guiding passage 25.
  • the sub-valve element 36 is slidably supported by the guiding passages 25 and 27 at one end side of the sub-valve element 36 and at the other end thereof. That is, the sub-valve element 36 is supported by the body at two points.
  • the sub-valve seat 34 is formed on an upper surface of the solenoid 3. The sub-valve element 36 closes and opens the sub-valve by touching and leaving the sub-valve seat 34, respectively.
  • the main valve hole 20 is provided in a reduced diameter portion in an upper portion of the sub-valve element 36, and the main valve seat 22 is formed in a lower end opening of the main valve hole 20.
  • an elongated actuating rod 38 is provided along an axis line of the body 5. An upper half of the actuating rod 38 is inserted to the sub-valve element 36, whereas a lower half thereof is inserted to the solenoid 3. An upper end of the actuating rod 38 is slidably supported by an upper end of the sub-valve element 36, and the actuating rod 38 and the power element 6 are connected at ends thereof such that the actuating rod 38 can be operatively coupled or linked to the power element 6.
  • a lower end of the actuating rod 38 is connected to a plunger 50 (described later) of the solenoid 3.
  • the diameter of a middle part of the actuating rod 38 is enlarged, thereby forming the main valve element 30.
  • the main valve element 30 closes and opens the main valve by touching and leaving the main valve seat 22 in the pressure chamber 24, respectively. Thereby the main valve element 30 regulates the flow rate of refrigerant flowing from the discharge chamber to the crankcase.
  • the actuating rod 38 directly transmits the solenoidal force to the main valve element 30 and the sub-valve element 36.
  • a spring 44 (functioning as a "biasing member”) that biases the sub-valve element 36 in a closing direction of the sub-valve is set between the sub-valve element 36 and the body 5.
  • the power element 6 includes a bellows 45 (functioning as a "pressure-sensing member”) that develops a displacement by sensing the suction pressure Ps. And the power element 6 generates an opposing force to oppose the solenoidal force by the displacement of the bellows 45. This opposing force is also transmitted to the main valve element 30 by way of the actuating rod 38.
  • the solenoid 3 includes a stepped cylindrical core 46, a bottomed cylindrical sleeve 48, which is so assembled as to seal off a lower-end opening of the core 46, a cylindrical plunger 50, which is housed in the sleeve 48 and which is disposed in a position opposite to the core 46 in the direction of axis line, a cylindrical bobbin 52, which is inserted around the core 46 and the sleeve 48, an electromagnetic coil 54, wound around the bobbin 52, which generates a magnetic circuit when the solenoid 3 electrically conducts, a cylindrical casing 56, which is so provided as to cover the electromagnetic coil 54 from outside and which also functions as a yoke, and an end member 58, which is so provided as to seal off a lower-end opening of the casing 56.
  • the body 5, the core 46, the casing 56 and the end member 58 form a body for the whole control valve 1.
  • a spring 47 (functioning as a "biasing member”) that biases the plunger 50 in a direction separating the plunger 50 away from the core 46 is set between the plunger 50 and the core 46.
  • the valve unit 2 and the solenoid 3 are secured such that a lower end of the body 5 is press-fitted to an upper-end opening of the core 46.
  • the pressure chamber 24 is formed between the core 46 and the sub-valve element 36.
  • the actuating rod 38 is inserted to the core 46 such that the actuating rod 38 penetrates a center of the core 46 in the direction of axis line.
  • the lower end of the actuating rod 38 is press-fitted to an upper half of the plunger 50, and the actuating rod 38 and the plunger 50 are coaxially connected to each other.
  • the actuating rod 38 is supported by the plunger 50 from below and is configured such that actuating rod 38 can be operatively coupled or linked to the main valve element 30, the sub-valve element 36 and the power element 6.
  • the actuating rod 38 appropriately transmits the solenoidal force, which is a suction force generated between the core 46 and the plunger 50, to the main valve element 30 or the sub-valve element 36.
  • a drive force which is generated by an expansion/contraction movement of the power element 6, is so exerted on the actuating rod 38 as to oppose the solenoidal force.
  • this drive force to oppose the solenoidal force will be referred to as "pressure-sensing drive force" also.
  • the force adjusted by the solenoidal force and the pressure-sending drive force acts on the main valve element 30 and appropriately controls the opening degree of the main valve.
  • the actuating rod 38 is displaced relative to the body 5 in accordance with the magnitude of the solenoidal force, pushes up the sub-valve element 36 and thereby opens the sub-valve. Thereby, a bleed function is achieved.
  • a ring-shaped shaft support member 60 is press-fitted on an upper end of the core 46, and the actuating rod 38 is slidably supported by the shaft support member 60 in the direction of axis line.
  • a communicating groove in parallel with the direction of axis line is formed in a predetermined position of the outer periphery of the shaft support member 60.
  • the crank pressure Pc of the pressure chamber 24 passes through the communicating groove and a communicating path 62, which is formed by the spacing between the actuating rod 38 and the core 46, and is then led into the sleeve 48 as well.
  • the communicating path 62 functions as a orifice by which the interior of the sleeve 48 functions as an oil damper chamber.
  • the same type of oil as that contained in the refrigerant for lubrication of the compressor is introduced, in advance, into the sleeve 48 as part of a manufacturing process of the control valve 1.
  • the communicating groove provided in the shaft support member 60 functions as a throttle passage, which gives resistance to the flow of oil into and out of the sleeve 48.
  • the arrangement may be such that the communicating path 62 functions as the throttle passage, which gives resistance to the flow of oil into and out of the sleeve 48.
  • the communicating groove provided in the shaft support member 60 and the communicating path 62 functions as the throttle passage.
  • the spring 47 function as an off-spring that biases both the core 46 and the plunger 50 in a direction in which they get mutually separated apart from each other.
  • the sleeve 48 is made of a nonmagnetic material.
  • a plurality of communicating grooves 66 are provided, in parallel with the axis line, on a side of the plunger 50.
  • a plurality of communicating grooves 68 which extend radially and communicates the inside and the outside of the plunger 50, are provided at a lower end surface of the plunger 50.
  • connection terminals 72 connected to the electromagnetic coil 54 extend from the bobbin 52 and are led outside by passing through the end member 58. Note that only one of the pair of connection terminals 72 is shown in FIG. 1 for convenience of explanation.
  • the end member 58 is installed in such a manner as to seal the entire structure inside the solenoid 3 contained in the casing 56 from below.
  • the end member 58 is molded (injection molding) of a corrosion-resistant resin, and the resin material is filled into gaps between the casing 56 and the electromagnetic coil 54 also. With the resin material filled into the gaps between the casing 56 and the electromagnetic coil 54, the heat release performance is improved because the heat generated by the electromagnetic coil 54 is easily conveyed to the casing 56.
  • the ends of the connection terminals 72 are led out from the end member 58 and connected to a not-shown external power supply.
  • FIG. 2 is a partially enlarged cross-sectional view of the upper half of FIG. 1 .
  • the body 5 is constituted by integrally assembling a first body 81 and a second body 82.
  • the first body 81 is of a stepped cylindrical shape such that the outside diameter thereof gets smaller in stages upwardly. Also, the first body 81 slidably supports a lower half of the sub-valve element 36 along the guiding passage 27 formed inside the first body 81.
  • the second body 82 which is of a stepped cylindrical shape, is fixed such that a lower half thereof is inserted to an upper half of the first body 81.
  • the body 5 is configured by coupling the first body 81 and second body 82 together as described above, the body 5 is configured such that the outside diameter thereof becomes smaller toward a power element 6 side from a solenoid 3 side. As a result, easiness to insert the body 5 into a mounting hole of the not-shown compressor is enhanced.
  • a communicating hole 83 which communicates the inside and outside of the second body 82, is provided in a lower lateral part of the second body 82.
  • the port 14 is formed in an overlapped portion that is a region where the first body 81 and the second body 82 are overlapped with each other.
  • the power element 6 is so provided as to be held inside the upper half of the second body 82.
  • the inside diameter of the lower half of the second body 82 is slightly reduced and thereby the guiding passages 25 and 26 are formed.
  • An O-ring 28 for sealing (functioning as a "sealing member") is provided in a sliding surface of the guiding passage 26. The O-ring 28 prevents the high-pressure refrigerant introduced through the port 14 from leaking into the port 16 by passing through a gap between the sub-valve element 36 and the guiding passage 26.
  • An upper surface 90 of the main valve element 30 functions not only as a "attaching/detaching portion” that closes and opens the main valve by touching and leaving the main valve seat 22, respectively, but also as an “engagement portion” that presses the sub-valve element 36 upward (in an opening direction of the sub-valve) with the main valve element 30 being seated on the main valve seat 22.
  • an upper surface 92 of the middle part of the sub-valve element 36 functions as a "stopper” that restricts an upward movement of the sub-valve element 36 when the upper surface 92 thereof is stopped by an underside of the second body 82.
  • An upper end portion 94 of the actuating rod 38 is slidably inserted to an upper end of the sub-valve element 36, and the upper end portion 94 thereof also functions as a partition wall that isolates the pressure chamber 23 from other pressure chambers.
  • the actuating rod 38 is pushed down by the biasing force of the spring 47 (see FIG. 1 ) while the solenoid 3 is not electrically conducting.
  • the main valve element 30 is spaced apart from the main valve seat 22, and the main valve is fully opened.
  • the sub-valve element 36 maintains a closed state of the sub-valve by the biasing force of the spring 44, the displacement of the sub-valve element 36 in the downward direction is restricted when the sub-valve element 36 is seated on the sub-valve seat 34.
  • the shape and the size of the sub-valve element 36 are set such that the upper surface 92 thereof is spaced apart from the underside of the second body 82 at a predetermined interval L1, while the sub-valve is in a closed state.
  • the power element 6 is so structured that an upper end opening of the bellows 45 is closed by a first stopper 84 ("base member”) and an lower end opening thereof is closed by a second stopper 86 ("base member").
  • the first stopper 84 is of a stepped cylindrical shape, and extends in the direction of axis line inside the bellows 45.
  • the second stopper 86 is of a disk shape, and a central part of the upper surface of the second stopper 86 is disposed counter to a lower end surface of the first stopper 84.
  • the interior of the bellows 45 is an airtight reference pressure chamber S, and a spring 88 is interposed between the first stopper 84 and the second stopper 86 in such a manner as to bias the bellows 45 in an expanding direction.
  • the reference pressure chamber S is in a vacuum state according to the present embodiment.
  • the first stopper 84 is formed integrally with the end member 13. Thus, the first stopper 84 is fixed relative to the body 5.
  • the bellows 45 expands or contracts in the direction of axis line (opening/closing direction of the main valve) according to a pressure difference between the suction pressure Ps of the pressure chamber 23 and the reference pressure of the reference pressure chamber S.
  • the end surfaces of the first stopper 84 and the second stopper 86 will abut against each other and will be stopped thereby as a result of a predetermined contraction of the bellows 45, thus restricting the contraction.
  • the main valve element 30 and the main valve seat 22 constitute a main valve, and the opening degree of the main valve regulates the flow rate of refrigerant flowing from the discharge chamber to the crankcase.
  • the sub-valve element 36 and the sub-valve seat 34 constitute a sub-valve, and the opening/closing of the sub-valve permits or shuts off the delivery of refrigerant from the crankcase to the suction chamber.
  • the control valve 1 functions as a three-way valve, too, by opening either the main valve or the sub-valve.
  • an effective pressure-receiving diameter A (seal section diameter) of the sub-valve element 36 in the sub-valve and an effective pressure-receiving diameter B (seal section diameter) of the sliding portion of the sub-valve element 36 relative to the guiding passage 27 are set equal to each other.
  • an effective pressure-receiving diameter C (seal section diameter) of the sliding portion of the sub-valve element 36 relative to the guiding passage 25 and an effective pressure-receiving diameter D (seal section diameter) of the sliding portion of the sub-valve element 36 relative to the guiding passage 26 are set equal to each other.
  • the sub-valve can be quickly opened by starting the solenoid 3.
  • the load that the sub-valve element 36 receives on account of the pressure difference (Pc - Ps) will not be large even though the size of this portion is changed. Accordingly, the size of the sub-valve element 36 can be set freely.
  • an effective pressure-receiving diameter E (seal section diameter) of the main valve element 30 in the main valve and an effective pressure-receiving diameter F (seal section diameter) of the sliding portion of the main valve element 30 are set equal to each other.
  • the sub-valve element 36 may be configured such that the outside diameter of a lower end opening thereof is made small, for instance, and the sub-valve element 36 is constructed in a stepped form. And an effective pressure-receiving area by a difference (D - E) between the effective pressure-receiving diameter D and the pressure-receiving diameter E may be set equal to an effective pressure-receiving area by a difference (B - A) between the effective pressure-receiving diameter B and the pressure-receiving diameter A.
  • the main valve operates autonomously so that, in a stable controlled state of the control valve 1, the suction pressure Ps of the pressure chamber 23 becomes a predetermined set pressure Pset.
  • the set pressure Pset is basically adjusted beforehand by the spring loads of the springs 44, 47 and 88 and the load of the bellows 45, and is set as a pressure value at which the freezing of the evaporator can be prevented in view of the relationship between the temperature inside the evaporator and the suction pressure Ps.
  • the set pressure Pset can be changed by varying the supply current (set current) to the solenoid 3.
  • the solenoid 3 When, at the startup of the control valve 1, the solenoid 3 electrically conducts and thereby the actuating rod 38 is displaced relative to the sub-valve element 36, the main valve element 30 is seated on the main valve seat 22 so as to close the main valve. As a result, the valve-opening-direction drive force can be supplied to the sub-valve element 36 via the main valve element 30. This can lift the sub-valve element 36 from the sub-valve seat 34 so as to open the sub-valve.
  • the control valve 1 has a "forcible valve-opening mechanism" or “valve-opening mechanism” used to forcibly open the sub-valve using the drive force of the solenoid 3.
  • this forcible valve-opening mechanism will function as a lock release mechanism (interlocking mechanism, pressing mechanism, etc.) as well.
  • FIG. 3 and FIG. 4 are each a diagram to explain an operation of the control valve, and FIG. 3 and FIG. 4 correspond to FIG. 2.
  • FIG. 2 shows a state where the control valve operates with the minimum capacity.
  • FIG. 3 shows a state where a bleed function is in effect.
  • FIG. 4 shows a relatively stable controlled state. A description is given hereinbelow based on FIG. 1 with reference to FIG. 2 to FIG. 4 , as appropriate.
  • the actuating rod 38 is driven in an upward direction by the solenoidal force as shown in FIG. 3 with the result that the main valve is closed and the sub-valve is opened.
  • displacing the actuating rod 38 relative to the sub-valve element 36 has the main valve element 30 seated on the main valve seat 22 and then closes the main valve.
  • further displacing the actuating rod 38 relative to the body 5 while the main valve element 30 is being seated on the main valve seat 22, has the sub-valve element 36 separated away from the sub-valve seat 34 and then opens the sub-valve.
  • supplying the starting current to the solenoid 3 causes the main valve to be closed and thereby restricts the delivery of discharged refrigerant into the crankcase.
  • supplying the starting current thereto opens the sub-valve so as to promptly relieve the refrigerant in the crankcase into the suction chamber. This can promptly start the compressor.
  • supplying a large current to the solenoid 3 enables the sub-valve to be opened and therefore the compressor can be promptly started.
  • the locking can be released by pressing the sub-valve element 36 with the solenoidal force. Also, if the entry of foreign material into the sliding portion of the sub-valve element 36 has caused the sub-valve element 36 to be locked in a valve closing direction, the locking can be released when the suction pressure Ps drops and the bellows 45 expands, with the startup of the control valve 1, and then the second stopper 86 abuts against an upper end surface of the sub-valve element 36 and presses the sub-valve element 36 downward.
  • the suction pressure Ps is relatively low as shown in FIG. 4 .
  • the bellows 45 expands and is operatively coupled to the actuating rod 38.
  • the main valve element 30 moves so as to regulate the opening degree of the main valve.
  • the main valve element 30 stops at a valve-lift position.
  • This valve-lift position is a position where three forces are all balanced thereamong.
  • the three forces are the force by the spring 47 in the valve opening direction, the solenoidal force by the solenoid 3 in the valve closing direction, and the opposing force, to oppose the solenoidal force, generated by the power element 6 operated according to the suction pressure Ps. Since the state, where the sub-valve element 36 is seated on the sub-valve seat 34 by the biasing force of the spring 44, is kept in the controlled state of the main valve, the closed state of the sub-valve is maintained.
  • the bellows 45 contracts and therefore the main valve element 30 is displaced relatively upward (in the valve closing direction).
  • the opening degree of the main valve becomes small and therefore the compressor operates in such a manner as to increase the discharging capacity.
  • a change is made in a direction where the suction pressure Ps drops.
  • the bellows 45 expands.
  • the biasing force by the power element 6 works in such a direction as to oppose the solenoidal force.
  • the compressor operates in such a manner as to reduce the discharging capacity.
  • the suction pressure Ps is kept at the set pressure Pset.
  • the conduction state (on/off) of the solenoid 3 is switched from on to off in the control valve 1. This means that no suction power is in effect between the core 46 and the plunger 50.
  • the main valve element 30 gets separated away from the main valve seat 22 by the biasing force of the spring 47, and the main valve is fully opened.
  • the sub-valve element 36 is seated on the sub-valve seat 34 and therefore the sub-valve is closed.
  • the refrigerant, at the discharge pressure Pd, introduced into the port 16 from the discharge chamber of the compressor passes through the fully opened main valve and flows into the crankcase from the port 14.
  • the crank pressure Pc rises and then the compressor performs the minimum capacity operation.
  • FIG. 5 is a graph showing a valve characteristic of the control valve.
  • the horizontal axis in FIG. 5 indicates the displacement of the actuating rod 38, and the vertical axis indicates the valve opening degrees (area of opening) of the main valve and the sub-valve.
  • the displacement of the actuating rod 38 corresponds to the uplift amount of the main valve element 30 from the main valve seat 22 and the uplift amount of the sub-valve element 36 from the sub-valve seat 34.
  • a solid line in FIG. 5 indicates the main valve, and a dashed line indicates the sub-valve.
  • the opening degree of the main valve becomes larger gradually while the sub-valve is being closed.
  • the opening degree of the sub-valve becomes larger gradually while the main valve is being closed.
  • the sub-valve starts to open simultaneously when the main valve is closed during the course when the actuating rod 38 is displaced upward.
  • the main valve starts to open simultaneously when the sub-valve is closed during the course when the actuating rod 38 is displaced downward.
  • the sub-valve Since the seal section diameter of the sub-valve element 36 in the sub-valve is considerably larger than that of the main valve element 30 in the main valve, the sub-valve has a larger inclination of the valve opening characteristics indicating the relation between the uplift amount of a valve element and the valve opening degree (area of opening), as compared with that of the main valve. That is, the area of opening of the sub-vale can be varied more greatly as compared to the uplift amount of the sub-valve element 36 (the displacement of the actuating rod 38) and therefore a large flow rate of refrigerant can be obtained at the time the sub-valve is open. As a result, a starting property of the compressor can be improved.
  • the liquid refrigerant has to outflow from the crankcase, at the startup of the compressor, under conditions of a small pressure difference (Pc - Ps).
  • Pc - Ps a small pressure difference
  • the opening degree of the sub-valve be larger, and therefore the structure employed in the present embodiment is advantageous in this respect.
  • the area of opening of the main valve relative to the uplift amount of the main valve element 30 can be relatively finely regulated.
  • the valve opening characteristic of the main valve can be stably kept and the control of the discharging capacity of the compressor can be accurately maintained.
  • the sub-valve seat 34 is not formed in the main valve element 30 but is formed as a part of the body 5. Accordingly, the sizes of the sub-valve hole 32 and the sub-valve element 36 can be set regardless of the size of the main valve element 30. In other words, the size of the sub-valve can be set regardless of the size of the main valve.
  • the sub-valve element 36 is provided on a side closer to the solenoid 3, namely, on the side where the outside diameter of the body 5 is larger, so that the sub-valve element 36 can be sufficiently made large.
  • the inclination of the valve opening characteristic of the sub-valve is set sufficiently larger than that of the main valve.
  • the main valve seat 22 is formed integrally with the sub-valve element 36, the number of components used can be reduced. Furthermore, the main valve seat 22 (seat forming section) and the sub-valve element 36 are formed integrally with each other.
  • the sub-valve element 36 which is formed integrally with the main valve seat 22, moves to open the sub-valve simultaneously with the movement of said main valve seat 22 after the closing of the main valve. It is therefore no longer required to adjust separately the timing with which the main valve is closed and the timing with which the sub-valve is opened. This can reduce the time otherwise spent for selecting the particular parts required and the positions to be adjusted, thereby markedly improving the assemblability.
  • FIG. 6 is a cross-sectional view showing a structure of a control valve according to a second embodiment. A description is hereinbelow given centering around different features from the first embodiment. Note that the structural components in FIG. 6 closely similar to those of the first embodiment are given the identical reference numerals.
  • a control valve 201 is configured by integrally assembling a valve unit 202 and a solenoid 203.
  • a body 205 is formed of a single member, and an adjustment member 213 is screwed in an upper-end opening of the body 205.
  • the port 12 is open to a lateral side of the body 205 at an upper part thereof.
  • a ring-shaped strainer 17 is provided around the port 14.
  • the strainer 17 includes a filter that suppresses foreign materials or the like from entering into the interior of the body 205.
  • An upper end of an actuating rod 238 extends to the interior of a power element 206.
  • An upper end of a sub-valve element 236 is not exposed to the pressure chamber 23, and the discharge pressure Pd is received by the upper end thereof.
  • the solenoid 203 is provided with a core 246, a sleeve 248, a plunger 250, a bobbin 52, an electromagnetic coil 54, a casing 256, and an end member 58.
  • the body 205, the casing 256 and the end member 58 form a body for the whole control valve 201.
  • a lower end of the actuating rod 238 is inserted to an upper portion of the plunger 250.
  • No spring is provided between the plunger 250 and the core 246.
  • a spring 247 (functioning as a "biasing member") that biases force in a direction separating the plunger 250 away from the core 246 is set between the sub-valve element 236 and the actuating rod 238.
  • valve unit 202 and the solenoid 203 are secured such that a lower end of the body 205 is press-fitted to an upper-end of the casing 256.
  • a valve seat member 260 is fitted on an upper surface of the core 246, and an upper surface of the valve seat member 260 forms the sub-valve seat 34.
  • the valve seat member 260 which is a nonmagnetic annular member, is formed of PTFE (polytetrafluoroethylene) in the second embodiment, and may be an elastic body such as rubber.
  • the valve seat member 260 may be fitted or baked on the core 246.
  • FIG. 7 is a partially enlarged cross-sectional view of the upper half of FIG. 6 .
  • the guiding passage 25 of the body 205 slidably supports an upper portion 262 of the actuating rod 238.
  • a spring support member 240 is provided below the main valve element 30 in the actuating rod 238.
  • a spring 247 is set between the sub-valve element 236 and the spring support member 240. The spring 247 biases the sub-valve element 236 in a valve opening direction.
  • the actuating rod 238 and the plunger 250 are not fixed as in the first embodiment, the actuating rod 238 is biased, by a reaction force of the spring 247, toward the plunger 250.
  • a structure according to the second embodiment is such that the actuating rod 238 does not need to be press-fitted to the plunger 250.
  • the sub-valve element 236 is slidably inserted along the guiding passage 26 and the guiding passage 27.
  • the sub-valve element 236 is supported by the body at two points.
  • An O-ring 228 for sealing (functioning as a "sealing member") is provided in a surface of the sub-valve element 236 opposite to the guiding passage 26. The O-ring 228 prevents the refrigerant introduced through the port 14 from leaking into the port 16 by passing through a gap between the sub-valve element 236 and the guiding passage 26.
  • the power element 206 is configured by including a base member 284 and a bellows 245.
  • the base member 284 which is constructed in a bottomed cylindrical shape by press-forming a metal, has a flange 286 that extends radially outward at a lower end opening thereof.
  • the bellows 245 is configured such that an upper end of the bellows-like body thereof is closed and such that a lower end opening part thereof is hermetically welded to an upper surface of the flange 286.
  • the bellows 245 expands and contracts with a body of the base member 284 as an axial center.
  • the bellows 245 is supported, by the adjustment member 213, at an end thereof opposite to the flange 286.
  • a spring 290 (functioning as a "biasing member”) that biases the bellows 245 in a contraction direction is set between the flange 286 and the body 205.
  • the power element 206 is elastically supported in between the adjustment member 213 and the body 205.
  • the set load of the power element 206 i.e., the set load of the spring 88
  • the set load of the power element 206 can be adjusted by a screwing amount of the adjustment member 213 into the body 205.
  • a body of the base member 284 extends to a location near a bottom portion of the bellows 245, and an upper end (a bottom of the base member 284) of the body of the base member 284 is located near the bottom portion of the bellows 245.
  • the upper end of the actuating rod 238 is inserted inside the body of the base member 284.
  • an effective pressure-receiving diameter E (seal section diameter) of the main valve element 30 in the main valve and an effective pressure-receiving diameter F (seal section diameter) of the sliding portion of the actuating rod 238 are set equal to each other.
  • an upper end of the sub-valve element 236 is open to the port 14.
  • a pressure difference (Pd - Pc) between the discharge pressure Pd and the crank pressure Pc acts on the sub-valve element 236 in a closing direction of the sub-valve.
  • the sub-valve element 236 is pressured against the sub-valve seat 34 by this pressure difference (Pd - Pc) when the main valve is being controlled, and therefore the closed state of the sub-valve is stably maintained. In other words, the main valve is controlled in a stabilized manner.
  • the pressure difference (Pd - Pc) is small.
  • the sub-valve can be quickly opened by the drive force of the solenoid 203.
  • the area of opening of the sub-valve becomes large quickly as described above, so that the bleed function can be effectively achieved.
  • the control valve 201 according to the second embodiment can also achieve the same valve opening characteristic as shown in FIG. 5 .
  • the control valve 201 is configured such that the nonmagnetic valve seat member 260 is provided for the core 246, which is formed of a magnetic material, and such that the sub-valve element 236 touches and leaves the valve seat member 260.
  • This configuration has an improved sealing property of the sub-valve over that of the sub-valve used in the first embodiment.
  • the refrigerant introduced through the port 14 may contain foreign material such as metallic powders. This is because the metallic powders, which have come off as a result of friction of a piston or the like in the compressor, are discharged together with the refrigerant. Such foreign material is more likely to be attracted to the surface of components, such as the core, which constitute the magnetic circuit. Accordingly, the foreign material may adhere to and stay on the valve seat in the configuration like the first embodiment where the valve seat (the sub-valve seat) is formed in the core itself. This may possibly deteriorate the sealing property of the valve section.
  • the nonmagnetic valve seat member 260 is provided in the core 246, and the sub-valve seat 34 is formed in the valve seat member 260.
  • this configuration according to the second embodiment can prevent or suppress the adherence of such foreign substances.
  • the valve seat member 260 may be constituted by an elastic or flexible member. In this case, even though a small amount of foreign substances adheres to the valve seat, the sagging or deflection of the valve seat member 260 occurs when the sub-valve element 236 is seated. Hence, the sealing property can be maintained.
  • a "nonmagnetic part” is provided such that a nonmagnetic material is mounted to a part of said magnetic member and then the valve seat is formed in this nonmagnetic part.
  • the "nonmagnetic part” may preferably be an elastic member or a flexible member.
  • an attaching/detaching portion that touches and leaves such the valve seat may be configured by using an elastic member or a flexible member.
  • FIG. 8 is a partially enlarged cross-sectional view of the upper half of a control valve according to a third embodiment.
  • the control valve according to the third embodiment differs from the second embodiment in a positional relationship between the sub-valve and the main valve.
  • a description is hereinbelow given centering around different features from the second embodiment. Note that the structural components in FIG. 8 closely similar to those of the second embodiment are given the identical reference numerals.
  • a control valve 301 is configured by integrally assembling a valve unit 302 and a solenoid 303.
  • An adjustment member 313 is screwed in an upper-end opening of a body 305.
  • the port 12 is so provided as to run through the adjustment member 313.
  • the port 16 is provided between the port 12 and the port 14.
  • a guiding passage 327 (functioning as a "third guiding passage") is provided in an upper portion of the body 305.
  • the guiding passage 26 is formed such that the size (diameter) thereof is slightly larger than that of the guiding passage 25.
  • a sub-valve element 336 which is of a stepped cylindrical shape, is inserted along the guiding passages 327, 25 and 26. That is, the sub-valve element 336 is supported by the body at two points.
  • the sub-valve seat 34 is formed on an upper surface of a partition wall, which isolates the port 14 from the port 16, in the body 305.
  • the sub-valve element 336 partitioned the body 305 at below the guiding passage 327 into a pressure chamber 325, which is located inside the sub-valve element 336, and a pressure chamber 326, which is located outside the sub-valve element 336.
  • the pressure chamber 325 communicates with the port 12 via the pressure chamber 23, whereas the pressure chamber 326 communicates with the port 16.
  • Communicating holes 337 and 35 that communicate the inside and the outside of the sub-valve element 336 are formed in a middle part of and an upper portion of the sub-valve element 336, respectively.
  • the communicating hole 337 communicates between the sub-valve hole 32 and the pressure chamber 23.
  • the main valve hole 20 is formed in a lower part of the sub-valve element 336, and the main valve seat 22 is formed in a lower end opening of the main valve hole 20.
  • a upper half of the actuating rod 338 penetrates the sub-valve element 336, and the actuating rod 338 is operatively coupled or linked to the power element 206.
  • the O-ring 228 is provided in a surface of the sub-valve element 336 opposite to the guiding passage 26.
  • An intermediate pressure chamber 328 is formed between the body 305 and the solenoid 303.
  • a lower end (i.e., the main valve seat 22) of the sub-valve element 336 is exposed to the intermediate pressure chamber 328.
  • the main valve element 30 closes and opens the main valve by touching and leaving the main valve seat 22 from an intermediate pressure chamber 328 side.
  • a communicating path 350 that communicates between the intermediate pressure chamber 328 and the pressure chamber 326 is formed in the body 305.
  • the discharge pressure Pd of the refrigerant introduced through the port 14 is reduced to the crank pressure Pc by having passing through the main valve and is then temporarily introduced into the intermediate pressure chamber 328.
  • the refrigerant temporarily introduced into the intermediate pressure chamber 328 is led to the port 16 by way of the communicating path 350 and the pressure chamber 326.
  • the spring 47 that biases force in a direction separating the plunger 250 away from the core 346 is set between the core 346 and the plunger 250 (see FIG. 1 and FIG. 6 ).
  • the spring 290 is set between the power element 206 and the sub-valve element 336.
  • the body 305, the casing 256 and the end member 58 form a body for the whole control valve 301.
  • Such a structure as described above maintains a closed state of the sub-valve, as shown in FIG. 8 , by the biasing force of the spring 290, while the solenoid 303 is not electrically conducting. Since the actuating rod 338 is pushed downward by the spring 47 (see FIG. 1 ), the main valve element 30 is spaced apart from the main valve seat 22 and then the main valve is fully opened.
  • the main valve element 30 In a stable controlled state of the control valve 301, the main valve element 30 is pushed upward by the solenoidal force but is not engaged with the sub-valve element 336; thus, the sub valve will not be opened.
  • the main valve element 30 operates autonomously so that the suction pressure Ps of the pressure chamber 23 becomes a predetermined set pressure Pset.
  • the solenoid 303 When, at the startup of the control valve 301, the solenoid 303 electrically conducts and thereby the actuating rod 338 is displaced relative to the sub-valve element 336, the main valve element 30 is seated on the main valve seat 22 so as to close the main valve. At this time, further displacing the actuating rod 338 relative to the body 305 with the main valve kept closed can lift the sub-valve element 336 from the sub-valve seat 34 so as to open the sub-valve.
  • the control valve 301 too, has the "forcible valve-opening mechanism" or “valve-opening mechanism” used to forcibly open the sub-valve using the drive force of the solenoid 303.
  • valve 301 can also achieve the same valve opening characteristic as shown in FIG. 5 .
  • a control valve 401 is configured by integrally assembling a valve unit 402 and a solenoid 403.
  • the strainer 17 is provided around the port 16 of a body 405.
  • An upper end of a core 446 slightly protrudes inside the body 405, and a ring-shaped guide member 460 is press-fitted to an upper-end opening of the upper end thereof.
  • a sub-valve element 436 closes and opens the sub-valve by touching and leaving the upper end surface of the core 446.
  • a pressure chamber 462, which is surrounded by the guide member 460 and the shaft support member 60, is formed in the core 446.
  • a communicating hole 448 which communicates between the pressure chamber 462 and the port 18, is formed.
  • An actuating rod 438 is divided into a first rod 440 and a second rod 442.
  • the first rod 440 is coupled to the power element 206, whereas the second rod 442 is coupled to the plunger 250 (see FIG. 6 ).
  • a lower end of the first rod 440 is slidably supported by the guide member 460.
  • An upper end of the second rod 442 is slidably supported by the shaft support member 60, and the tip thereof is formed in a semispherical shape.
  • the second rod 442 is operatively coupled to the first rod 440 in a manner such that the second rod 442 is in a point-contact with an underside of the first rod 440.
  • the suction pressure Ps is introduced to the pressure chamber 462, the interior of the sleeve 248 (see FIG. 6 ) is filled with the refrigerant at the suction pressure Ps and then the suction pressure Ps acts on the underside of the first rod 440. Both the main valve element 30 and the spring support member 240 are provided in the first rod 440.
  • an effective pressure-receiving diameter E (seal section diameter) of the main valve element 30 in the main valve, an effective pressure-receiving diameter F (seal section diameter) of an upper sliding portion of the first rod 440 and an effective pressure-receiving diameter G (seal section diameter) of a lower sliding portion of the first rod 440 are all set equal to each other.
  • the effects of the discharge pressure Pd, the crank pressure Pc and the suction pressure Ps acting on the main valve element 30 are canceled.
  • the pressure difference (Pc - Ps) no longer acts on the main valve element 30 and therefore the behavior of the main valve element 30, while the main valve is being controlled, can be further stably maintained.
  • the first rod 440 and the second rod 442 may be formed integrally with each other.
  • the so-called Ps sensing valve which is enabled upon sensing the suction pressure Ps as the pressure-to-be-sensed, is described as a control valve.
  • the control valve may be configured as a so-called Pc sensing valve, which is enabled upon sensing the crank pressure Pc.
  • the structure is such that the port 12 communicates with the crankcase.
  • a diaphragm may be used, instead of the bellows.
  • the structure may be such that a plurality of diaphragms are coupled in the direction of axis line in order to ensure a necessary running stroke required for the pressure-sensing member.
  • crankcase communication port (lead-in/out port) that communicates with the crankcase.
  • the crankcase communication port may be structured that it is divided into a first port (lead-out port), which is used to lead out the refrigerant, having passed through the main valve, to the crankcase, and a second port (lead-in port), which is used to introduce the refrigerant of the crankcase.
  • control valve of inflow type where the flow rate or pressure of refrigerant introduced into the crankcase from the discharge chamber of the variable displacement compressor is regulated.
  • it may be configured as a control valve of outflow type where the flow rate or pressure of refrigerant introduced into the suction chamber from the crankcase is regulated.
  • control valve of outflow type it is conceivable, in any of the first to fourth embodiments, for example, that the solenoidal force may be regulated such that an opened region of the sub-valve is used as a region to be controlled (hereinafter referred to as "controlled region" also).
  • a left side to the fully-closed point of FIG. 5 namely the opened region of the main valve
  • a right side to the fully-closed point of FIG. 5 namely the opened region of the sub-valve
  • the fully-closed point of FIG. 5 may be moved toward the bottom dead point by adjusting the length of the actuating rod, the length of the plunger or the position of the main valve element in the actuating rod; thereby a control range of the sub-valve element relative to the displacement of the actuating rod may be enlarged.
  • the structure according to each of the above-described embodiments is applicable to a composite valve, such as a three-way valve under other modes, as long as a main valve and a sub-valve are provided in a common body and it is driven by a single solenoid.
  • the reference pressure chamber S inside the bellows 45 or 245 is in a vacuum state.
  • the reference pressure chamber S may be filled with air or filled with a predetermined gas serving as a reference.
  • it may be so filled as to have any one of the discharge pressure Pd, the crank pressure PC, and the suction pressure Ps.
  • the power element 6 or 206 may be configured such that it is activated by sensing, as appropriate, the pressure difference between the interior and exterior of the bellows.

Claims (4)

  1. Soupape de contrôle (1, 201, 301, 401) pour un compresseur à débit variable, la soupape de contrôle faisant varier une capacité de refoulement du compresseur pour comprimer du fluide frigorigène acheminé dans une chambre d'aspiration du compresseur et refouler le fluide frigorigène comprimé à partir d'une chambre de refoulement du compresseur, par régulation d'un débit du fluide frigorigène acheminé dans un carter du compresseur à partir de la chambre de refoulement, la soupape de contrôle (1, 201, 301, 401) comprenant:
    un corps (5, 205, 305, 405) ayant une soupape principale dans un passage principal, qui communique entre la chambre de refoulement et le carter, et une soupape secondaire dans un passage secondaire, qui communique entre le carter et la chambre d'aspiration;
    un siège de soupape principale (22) situé dans une partie du corps formant le passage principal;
    un élément de soupape principale (30) configuré pour ouvrir et fermer la soupape principale en touchant et en quittant le siège de soupape principale (22);
    un siège de soupape secondaire (34) situé dans une partie du corps formant le passage secondaire;
    un élément de soupape secondaire (36, 236, 336, 436) configuré pour ouvrir et fermer la soupape secondaire en touchant et en quittant le siège de soupape secondaire (34);
    une section de détection de pression (6, 206) configurée pour détecter une pression à détecter prédéterminée (Ps) et configurée pour générer une force d'entraînement exercée dans une direction d'ouverture de la soupape principale en fonction d'une grandeur de la pression à détecter (Ps); et
    un solénoïde (3, 203, 303, 403) configuré pour générer une force d'entraînement dans une direction de fermeture de la soupape principale en fonction d'une quantité de courant fourni,
    la soupape principale fonctionnant de telle sorte que la pression à détecter (Ps) devient une pression définie (Pset) qui est définie en fonction d'un courant fourni au solénoïde,
    la soupape secondaire restant fermée pendant un état de contrôle de la soupape principale dans lequel la pression à détecter (Ps) devient la pression définie (Pset), la soupape secondaire étant ouverte après la fermeture de la soupape principale, et
    un changement de section d'ouverture de la soupape secondaire par rapport à une quantité de soulèvement de l'élément de soupape secondaire (36, 236, 336, 436) à partir du siège de soupape secondaire (34) étant plus grand que celui de la soupape principale par rapport à une quantité de soulèvement de l'élément de soupape principale (30) à partir du siège de soupape principale (22) lorsque la quantité de soulèvement de l'élément de soupape secondaire est égale à la quantité de soulèvement de la soupape principale.
  2. Soupape de contrôle (1, 201, 301, 401), pour un compresseur à débit variable, selon la revendication 1, dans laquelle la soupape secondaire est ouverte en même temps que le siège de soupape principale (22) se déplace après la fermeture de la soupape principale.
  3. Soupape de contrôle (1, 201, 301, 401), pour un compresseur à débit variable, selon la revendication 2, comprenant en outre une tige d'actionnement (38, 238, 338, 438) disposée entre la section de détection de pression (6, 206) et le solénoïde (3, 203, 303, 403),
    la tige d'actionnement (38, 238, 338, 438) étant introduite dans l'élément de soupape secondaire (36, 236, 336, 436) et étant formée d'un seul tenant avec l'élément de soupape principale (30),
    le siège de soupape principale (22) étant formé d'un seul tenant avec l'élément de soupape secondaire (36, 236, 336, 436), et
    lorsque, dans un état contrôlé de la soupape principale, la tige d'actionnement (38, 238, 338, 438) est déplacée par rapport à l'élément de soupape secondaire (36, 236, 336, 436), la quantité de soulèvement de l'élément de soupape principale (30) changeant tandis que la soupape secondaire reste fermée, et
    la tige d'actionnement (38, 238, 338, 438) et l'élément de soupape secondaire (36, 236, 336, 436) devenant intégrés l'un à l'autre en même temps que la soupape principale est fermée, et la quantité de soulèvement de l'élément de soupape secondaire (36, 236, 336, 436) changeant tandis que la soupape principale reste fermée.
  4. Soupape de contrôle (201, 401), pour un compresseur à débit variable, selon l'une quelconque des revendications 1 à 3, la soupape de contrôle (201, 401) étant configurée de telle sorte qu'au moins une parmi une première différence de pression et une seconde différence de pression agit sur l'élément de soupape secondaire (236, 436) dans une direction de fermeture de la soupape secondaire, la première différence de pression étant une différence de pression entre une pression (Pd) de la chambre de refoulement et une pression (Pc) du carter, et la seconde différence de pression étant une différence de pression entre la pression (Pd) de la chambre de refoulement et une pression (Ps) de la chambre d'aspiration.
EP14160650.9A 2013-03-27 2014-03-19 Soupape de contrôle pour compresseur de déplacement variable Active EP2784320B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013066787A JP6103586B2 (ja) 2013-03-27 2013-03-27 可変容量圧縮機用制御弁

Publications (3)

Publication Number Publication Date
EP2784320A2 EP2784320A2 (fr) 2014-10-01
EP2784320A3 EP2784320A3 (fr) 2016-07-27
EP2784320B1 true EP2784320B1 (fr) 2019-08-07

Family

ID=50289544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14160650.9A Active EP2784320B1 (fr) 2013-03-27 2014-03-19 Soupape de contrôle pour compresseur de déplacement variable

Country Status (3)

Country Link
EP (1) EP2784320B1 (fr)
JP (1) JP6103586B2 (fr)
KR (1) KR102129731B1 (fr)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014218525B4 (de) 2014-09-16 2016-10-13 Te Connectivity Germany Gmbh Elektrisches Regelventil für einen Klimakompressor mit einem Sensor zur Bestimmung der Stellung des Regelkolbens
JP6500183B2 (ja) 2015-04-02 2019-04-17 株式会社テージーケー 可変容量圧縮機用制御弁
JP6500184B2 (ja) * 2016-02-25 2019-04-17 株式会社テージーケー 可変容量圧縮機用制御弁
JP6714274B2 (ja) * 2016-06-13 2020-06-24 株式会社テージーケー 可変容量圧縮機用制御弁
US10781804B2 (en) * 2016-08-29 2020-09-22 Eagle Industry Co., Ltd. Displacement control valve
JP6760176B2 (ja) * 2017-03-29 2020-09-23 株式会社豊田自動織機 圧縮機
WO2019131694A1 (fr) * 2017-12-27 2019-07-04 イーグル工業株式会社 Soupape de régulation de capacité et procédé de régulation associé
JP7171616B2 (ja) * 2017-12-27 2022-11-15 イーグル工業株式会社 容量制御弁及び容量制御弁の制御方法
JP7167067B2 (ja) * 2018-01-26 2022-11-08 イーグル工業株式会社 容量制御弁
KR20190092234A (ko) * 2018-01-29 2019-08-07 한온시스템 주식회사 압축기의 제어장치, 그에 사용되는 전자식 제어밸브 및 그를 포함한 전동 압축기
WO2019159998A1 (fr) * 2018-02-15 2019-08-22 イーグル工業株式会社 Soupape de réglage de capacité
CN111712638B (zh) 2018-02-15 2022-05-03 伊格尔工业股份有限公司 容量控制阀
KR102352195B1 (ko) * 2018-02-27 2022-01-17 이구루코교 가부시기가이샤 용량 제어 밸브
US11225962B2 (en) 2018-05-23 2022-01-18 Eagle Industry Co., Ltd. Capacity control valve
WO2020013155A1 (fr) 2018-07-12 2020-01-16 イーグル工業株式会社 Soupape de commande de capacité
WO2020013154A1 (fr) 2018-07-12 2020-01-16 イーグル工業株式会社 Vanne de régulation de capacité
CN112424473B (zh) 2018-07-13 2023-02-28 伊格尔工业股份有限公司 容量控制阀
EP3835578B1 (fr) 2018-08-08 2023-12-06 Eagle Industry Co., Ltd. Soupape de régulation de capacité
JP7289604B2 (ja) 2018-08-08 2023-06-12 イーグル工業株式会社 容量制御弁
WO2020095918A1 (fr) 2018-11-07 2020-05-14 イーグル工業株式会社 Soupape de régulation de capacité
KR102603184B1 (ko) 2018-12-04 2023-11-16 이구루코교 가부시기가이샤 용량 제어 밸브
US11473684B2 (en) 2018-12-04 2022-10-18 Eagle Industry Co., Ltd. Capacity control valve
JP7391486B2 (ja) 2019-03-01 2023-12-05 イーグル工業株式会社 容量制御弁
KR20210136128A (ko) 2019-04-03 2021-11-16 이구루코교 가부시기가이샤 용량 제어 밸브
CN113661324B (zh) 2019-04-03 2023-06-06 伊格尔工业股份有限公司 容量控制阀
EP3998401A4 (fr) 2019-07-12 2023-07-12 Eagle Industry Co., Ltd. Soupape de régulation de capacité
JP7337453B2 (ja) * 2019-07-17 2023-09-04 イーグル工業株式会社 容量制御弁

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6010312A (en) * 1996-07-31 2000-01-04 Kabushiki Kaisha Toyoda Jidoshokki Seiksakusho Control valve unit with independently operable valve mechanisms for variable displacement compressor
JP4149558B2 (ja) * 1998-03-27 2008-09-10 サンデン株式会社 可変容量圧縮機の容量制御弁
JP4152674B2 (ja) * 2002-06-04 2008-09-17 株式会社テージーケー 可変容量圧縮機用容量制御弁
JPWO2004046549A1 (ja) * 2002-11-19 2006-03-16 株式会社ヴァレオサーマルシステムズ 可変容量型圧縮機の制御装置
JP4436295B2 (ja) * 2005-08-29 2010-03-24 サンデン株式会社 可変容量圧縮機
JP4599327B2 (ja) * 2006-05-23 2010-12-15 サンデン株式会社 可変容量圧縮機
JP2008240580A (ja) * 2007-03-26 2008-10-09 Tgk Co Ltd 可変容量圧縮機用制御弁
JP4861956B2 (ja) 2007-10-24 2012-01-25 株式会社豊田自動織機 可変容量型圧縮機における容量制御弁
KR101319565B1 (ko) * 2010-03-16 2013-10-23 이구루코교 가부시기가이샤 용량 제어밸브

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
KR102129731B1 (ko) 2020-07-03
EP2784320A3 (fr) 2016-07-27
EP2784320A2 (fr) 2014-10-01
JP2014190247A (ja) 2014-10-06
JP6103586B2 (ja) 2017-03-29
KR20140118808A (ko) 2014-10-08

Similar Documents

Publication Publication Date Title
EP2784320B1 (fr) Soupape de contrôle pour compresseur de déplacement variable
EP2733351B1 (fr) Soupape composite
US8956127B2 (en) Control valve for variable displacement compressor
US9863411B2 (en) Control valve for a variable displacement compressor
JP6064131B2 (ja) 可変容量圧縮機用制御弁
US9903362B2 (en) Control valve for a variable displacement compressor
EP2916003B1 (fr) Soupape de contrôle pour compresseur de déplacement variable
JP6085789B2 (ja) 可変容量圧縮機用制御弁
JP6064182B2 (ja) 可変容量圧縮機用制御弁
JP6007368B2 (ja) 制御弁
KR102046660B1 (ko) 가변 용량 압축기용 제어 밸브
KR20140141432A (ko) 가변 용량 압축기용 제어 밸브
JP6064181B2 (ja) 可変容量圧縮機用制御弁

Legal Events

Date Code Title Description
17P Request for examination filed

Effective date: 20140319

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: F04B 27/18 20060101AFI20160620BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

R17P Request for examination filed (corrected)

Effective date: 20170123

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180105

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190408

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1164296

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190815

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602014051141

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20190807

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191209

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191107

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191107

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1164296

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190807

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191207

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191108

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20200326

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200224

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602014051141

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG2D Information on lapse in contracting state deleted

Ref country code: IS

26N No opposition filed

Effective date: 20200603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200319

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200331

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200319

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200331

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200331

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20200319

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200319

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602014051141

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190807