WO2007111040A1 - 可変容量型圧縮機用制御弁 - Google Patents
可変容量型圧縮機用制御弁 Download PDFInfo
- Publication number
- WO2007111040A1 WO2007111040A1 PCT/JP2007/051572 JP2007051572W WO2007111040A1 WO 2007111040 A1 WO2007111040 A1 WO 2007111040A1 JP 2007051572 W JP2007051572 W JP 2007051572W WO 2007111040 A1 WO2007111040 A1 WO 2007111040A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compressor
- pressure
- valve
- control valve
- moving member
- Prior art date
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 239000003507 refrigerant Substances 0.000 description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 230000007423 decrease Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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
- F04B2027/1822—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
- F04B2027/184—Valve controlling parameter
- F04B2027/185—Discharge 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
- F04B2027/184—Valve controlling parameter
- F04B2027/1854—External parameters
-
- 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
- F04B2027/184—Valve controlling parameter
- F04B2027/1859—Suction pressure
Definitions
- the present invention includes a pressure sensing part, a solenoid part, and a valve part having a valve body force provided on a moving member, and the compressor internal pressure is adjusted by the valve opening of the valve body to change the discharge capacity.
- the present invention relates to a control valve for a variable capacity compressor.
- a control valve for a variable capacity compressor used for refrigerant compression of a vehicle air conditioner (see Patent Document 1) is known.
- This control valve uses a bellows assembly for the pressure-sensitive portion, and FIG. 5 is a schematic sectional view of such a control valve for a variable displacement compressor.
- the control valve 1 is composed of a solenoid part 2, a valve part 3 and a bellows assembly 4.
- the solenoid part 2 is arranged at one end of a cylindrical valve body 5 and generates a magnetic force by supplying current to the coil 6.
- the movable iron core 7 is fixed iron arranged on the left side against the spring 8. Move to the wick 9 side and apply an urging force to the valve rod 10 in proportion to the square of the current value.
- the valve body 5 is formed with a port 11 communicating with the discharge pressure Pd region of the variable displacement compressor and a port 12 communicating with the inner chamber (chamber pressure Pc) of the variable displacement compressor. Is configured such that the flow rate of the discharged refrigerant gas flowing toward the inner chamber of the compressor can be adjusted based on the valve opening of the valve element 13 with respect to the valve seat 14 formed at the end of the valve rod 10.
- the bellows assembly 4 is disposed in a pressure sensing chamber 16 composed of a case 15 and the valve body 5.
- 16 is the compressor suction pressure Ps.
- the bellows assembly 4 has a bellows 19 that is held freely by holders 17 and 18 at both ends, and a spring 20 is mounted between both holders, between the holder 18 and the left end 10a of the valve rod 10.
- the connecting rod 21 is disposed in contact with both members. Therefore, the change in the suction pressure Ps introduced into the pressure sensing chamber 16 Therefore, the bellows 19 expands and contracts, the urging force acting on the noble rod 10 changes, and the valve opening position becomes variable.
- Patent Document 1 Japanese Patent Laid-Open No. 2001-141086 (paragraphs 0015 to 0018 and FIGS. 1 and 4)
- control valve 1 in Patent Document 1 is configured such that the suction pressure Ps acts on the bellows 19 disposed in the pressure sensing chamber 16, while the discharge pressure Pd is the pressure sensing chamber 16. It is introduced from the port 11 of the nozzle body 5 adjacent to the pressure sensing chamber 16, and the communication between the pressure sensing chamber 16 and the port 11 side is almost blocked by the connecting rod 21, but is completely blocked! Therefore, the refrigerant gas moves from the gap between the connecting rod 21 and the valve body 5, and the gas leaks from the discharge pressure Pd side to the suction pressure Ps side, which deteriorates the efficiency.
- An object of the present invention is to provide a control valve for a variable displacement compressor capable of maintaining an appropriate suction pressure.
- control for a variable displacement compressor includes a pressure sensing part, a solenoid part, and a valve part having a valve body force provided in the moving member, and a variable capacity in which the discharge pressure is changed by adjusting the compressor internal pressure according to the valve opening of the valve body
- a control valve for a compressor wherein the discharge pressure of the compressor introduced into the pressure-sensitive portion applies a biasing force to the moving member, and the solenoid unit cooperates with the biasing force in response to an input signal.
- Energizing force is applied to the moving member, and the valve body is set in accordance with the position of the moving member so that the valve opening degree is set to reduce the ventilation flow rate of the communication path that connects the compressor discharge pressure region and the compressor inner chamber.
- the suction pressure of the compressor is introduced into the control valve to apply a biasing force to the moving member, and the fluid having the discharge pressure introduced into the pressure sensing portion and the suction pressure introduced into the control valve.
- the fluid having the discharge pressure of the compressor introduced into the pressure sensing portion and the fluid having the suction pressure of the compressor introduced into the control valve constitute a pressure sensing portion without using a seal member or the like. Therefore, the communication between the movable member and the movable member is blocked, so that the sliding resistance associated with the movement of the movable member can be eliminated and the flow rate of air flowing through the communication passage can be adjusted stably and accurately.
- the control valve is not controlled, it is possible to prevent movement of the moving member in the valve closing direction against an increase in discharge pressure.
- a control valve for a variable displacement compressor according to claim 2 of the present invention is the control valve for a variable displacement compressor according to claim 1, wherein the expansion member and the moving member are in contact with each other.
- a sealing chamber in which the suction pressure of the compressor acts is formed in the part.
- a sealing chamber in which the suction pressure of the compressor acts is formed at the contact portion between the expansion member and the moving member, so that the sealing property during control and the valve opening retention property during non-control are achieved. It can be secured with an extremely simple control valve configuration.
- FIG. 1 is a control flow diagram of a cooling cycle of a variable capacity compressor in an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the control valve used in FIG.
- FIG. 3 is an enlarged cross-sectional view of a pressure sensitive chamber.
- FIG. 4 A schematic diagram of the state of the urging force applied to the noble rod.
- FIG. 5 is a schematic sectional view of a conventional control valve for a variable displacement compressor.
- FIG. 1 is a control flow diagram of a cooling cycle of a variable capacity compressor in an embodiment of the present invention
- FIG. 2 is a cross-sectional view of a control valve for a variable capacity compressor used in FIG.
- FIG. 3 is an enlarged cross-sectional view of the pressure-sensitive chamber
- FIG. 4 is a balance state schematic diagram of the urging force applied to the valve rod.
- the control valve for a variable displacement compressor of the present invention is for performing output control of a variable displacement compressor used for refrigerant compression of a vehicle air conditioner such as a car air conditioner.
- the function of the cooling cycle of the valve will be explained based on Fig. 1.
- the refrigerant gas at the suction pressure Ps sucked from the evaporator 22 by the variable capacity compressor 20 is compressed to the high discharge pressure Pd, and the compressed refrigerant gas is converted into a liquid refrigerant by the condenser 24.
- variable capacity compressor 20 After that, it is a well-known cycle that is vaporized at once by the expansion valve 26, led to the evaporator 22, cooled in the passenger compartment by latent heat of vaporization, and then sucked into the variable capacity compressor 20 again. Accordingly, the discharge capacity of the variable capacity compressor 20 is controlled.
- a temperature sensor 30 is disposed in the vicinity of the evaporator 22, and temperature information of the evaporator 22 is sent to the controller 32 as an input signal.
- the controller 32 receives as input signals setting information X and temperature information Y from the temperature setting device 34 for designating the temperature of the passenger compartment, and an output signal having an optimum value based on these input signals. Calculate Z Output to the control valve 28.
- the operation of the control valve 28 will be described in detail later.
- the valve opening of the control valve 28 changes according to the magnitude of the signal, and the variable opening type is controlled by this valve opening.
- the flow rate of the refrigerant gas flowing into the inner chamber (crankcase chamber) of the compressor 20 is adjusted.
- the variable displacement compressor 20 can change its discharge capacity depending on the pressure Pc in its inner chamber.
- a variable swing inclined plate compressor is used.
- the chamber capacity of the variable displacement compressor 20 communicates with the intake side of the compressor through a restrictor such as a throttle, and the control valve 28 has a large valve opening and a large refrigerant gas flow rate.
- the chamber pressure Pc which is almost equal to the suction pressure Ps, increases and the swash plate rises to reduce the compressor discharge.
- the valve opening of the control valve 28 decreases, the chamber pressure Pc decreases.
- the swash plate is inclined to increase the discharge amount of the compressor.
- variable capacity compressor The configuration in which the discharge amount fluctuates due to the change in the chamber pressure Pc of the variable capacity compressor is not limited to that in which the chamber pressure of the compressor communicates with the suction side of the compressor through the limiter as described above.
- a conventionally known variable capacity compressor described in JP-A-63-16177 can be employed.
- the control valve 28 includes a solenoid part 36, a valve part 38, and a pressure sensitive part 40.
- the solenoid part 36 is arranged at one end of a cylindrical valve body 42, generates a magnetic force by converting the output signal Z from the controller 32 into a current value and supplying it to the coil 44, and the movable iron core 46 is spring 48. Against the fixed iron core 49 arranged on the left side and apply a biasing force with a magnitude proportional to the square of the current value to the valve rod 50.
- the valve body 42 has a port 52 that communicates with the suction pressure Ps of the variable displacement compressor 20, and a port 54 that communicates with the port 52 and the inner chamber (room pressure Pc) of the variable displacement compressor 20.
- the valve portion 38 is formed on the basis of the valve opening degree with respect to the valve seat 58 of the valve body 56 formed at the end of the noble rod 50 acting as a moving member. It is configured to be able to adjust the flow rate flowing in the direction of force.
- the other end of the valve body 42 constituting the pressure-sensitive part 40 is opposite to the solenoid part 36.
- a bellows assembly 64 expansion member
- the bellows assembly 64 has a bellows 70 having both ends held freely by holders 66, 68, and a spring 72 is mounted between the holders 66, 68.
- An elastically deformable cap body 74 is crowned at the left end of the valve rod 50 and is always in contact with the holder 68.
- the spring 72 is arranged on the outer peripheral portion of the bellows & solid body 64, even if the bellows 70 receives a biasing force in a tilting direction during expansion and contraction, the spring 72 suppresses the biasing force. Therefore, the thrust generated in the bellows assembly 64 by the discharge pressure Pd can be transmitted to the valve rod 50 in a stable state.
- the refrigerant gas having the discharge pressure Pd introduced into the pressure sensing chamber 62 expands and contracts the bellows 19 due to the pressure, and the urging force acting on the valve rod 50 changes, and the valve opening position becomes variable. The Then, the flow rate of the refrigerant gas flowing in the pressure sensing chamber 62 through the port 54 to the inner chamber of the compressor 20 through the port 54 is adjusted based on the valve opening degree of the valve body 56 with respect to the valve seat 58.
- a refrigerant gas having a suction pressure Ps is introduced into the suction chamber 76 that communicates with the port 52, and the right end of the cap body 74 and the holder 68 is connected via a communication hole 50 a formed in the valve rod 50. And communicated with a sealed chamber 78 formed by A seal ring 77 fitted to the outer periphery of the valve rod 50 blocks communication between the suction chamber 76 and the chamber on the port 54 side where the chamber pressure Pc acts.
- the balance type of the force acting on the valve rod 50 when the control valve 28 is configured as described above is as follows.
- F1 is the biasing force of the spring 72
- F2 is the biasing force of the spring 48
- F is the solenoid thrust.
- the rightward force applied to the valve rod 50 is the urging force F1 of the spring 72, the urging force F2 of the spring 48, and the discharge pressure.
- the controller 32 controls the solenoid unit 36.
- it works as a biasing force in the left direction.
- This urging force causes the valve rod 50 to move in the direction in which the valve opening 56 closes toward the valve seat 58 in the direction in which the valve opening is closed, and the discharge area force of the variable displacement compressor 20 Refrigerant gas flow decreases and the chamber pressure Pc decreases.
- the swash plate tilts and acts to increase the discharge amount of the compressor 20, and the discharge pressure Pd increases and the suction pressure Ps decreases.
- the noble rod 50 is held at the valve opening position where the thrust applied by the solenoid 36 and the reduced suction pressure Ps are balanced. Therefore, the optimum suction pressure Ps corresponding to the output signal Z from the controller 32 can be obtained and the temperature in the passenger compartment can be lowered to the set temperature.
- the refrigerant discharged from the compressor introduced into the pressure sensing portion and the refrigerant refrigerant sucked into the compressor introduced into the control valve are disconnected from each other by the holder 68 and the cap body 74. Therefore, the valve rod 50 can be moved smoothly without sliding resistance, and the flow rate of the refrigerant gas through the communication path can be adjusted stably and accurately. Note that when the valve opening is normally fully open, the force that causes the bellows 70 to contract due to the high discharge pressure Pd even in the non-control state, such as in midsummer, even during non-control.
- the sealed chamber 78 is opened and the valve open state can be maintained by temporarily communicating with the suction pressure side via the communication hole 50a formed in the valve rod 50.
- a simple control valve configuration is formed in which the communication hole 50a is formed in the valve rod 50 to communicate with the sealing chamber 78, and the sealing performance of the sealing chamber is improved during control. It can be secured, and the valve open state can be maintained when not controlled.
- control valve is used for the output control of the variable displacement compressor that compresses the refrigerant.
- present invention is not limited to the refrigerant gas but can be applied to other general fluids. It is.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008507387A JP5128466B2 (ja) | 2006-03-29 | 2007-01-31 | 可変容量型圧縮機用制御弁 |
US12/278,101 US8449266B2 (en) | 2006-03-29 | 2007-01-31 | Control valve for variable displacement compressor |
CN2007800020126A CN101365879B (zh) | 2006-03-29 | 2007-01-31 | 可变容量型压缩机用控制阀 |
EP07707774.1A EP2000670B1 (en) | 2006-03-29 | 2007-01-31 | Control valve for variable displacement compressor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006090603 | 2006-03-29 | ||
JP2006-090603 | 2006-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007111040A1 true WO2007111040A1 (ja) | 2007-10-04 |
Family
ID=38540975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/051572 WO2007111040A1 (ja) | 2006-03-29 | 2007-01-31 | 可変容量型圧縮機用制御弁 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8449266B2 (ja) |
EP (1) | EP2000670B1 (ja) |
JP (1) | JP5128466B2 (ja) |
CN (1) | CN101365879B (ja) |
WO (1) | WO2007111040A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010030040A1 (ja) * | 2008-09-12 | 2010-03-18 | サンデン株式会社 | 容量制御弁、可変容量圧縮機及び可変容量圧縮機の容量制御システム |
Families Citing this family (7)
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US20120305822A1 (en) * | 2011-05-10 | 2012-12-06 | Delphi Technologies, Inc. | Electronic control valve having an integral non-contact noise mitigation device |
US9551334B2 (en) | 2011-05-23 | 2017-01-24 | Doowon Technical College | Variable capacity compressor having a control valve with channels |
EP3505758B1 (en) * | 2016-08-29 | 2021-03-03 | Eagle Industry Co., Ltd. | Capacity control valve |
CN114687984A (zh) * | 2017-11-15 | 2022-07-01 | 伊格尔工业股份有限公司 | 容量控制阀 |
USD913337S1 (en) * | 2019-01-14 | 2021-03-16 | Henry C. Chu | Compressor internal control valve |
US12031531B2 (en) * | 2019-04-24 | 2024-07-09 | Eagle Industry Co., Ltd. | Capacity control valve |
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Also Published As
Publication number | Publication date |
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CN101365879B (zh) | 2011-04-13 |
EP2000670B1 (en) | 2018-07-25 |
JP5128466B2 (ja) | 2013-01-23 |
US8449266B2 (en) | 2013-05-28 |
CN101365879A (zh) | 2009-02-11 |
EP2000670A4 (en) | 2017-02-08 |
US20090035156A1 (en) | 2009-02-05 |
EP2000670A2 (en) | 2008-12-10 |
EP2000670A9 (en) | 2009-03-11 |
JPWO2007111040A1 (ja) | 2009-08-06 |
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