CN101153667B - Expansion valve - Google Patents

Expansion valve Download PDF

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Publication number
CN101153667B
CN101153667B CN2007101618590A CN200710161859A CN101153667B CN 101153667 B CN101153667 B CN 101153667B CN 2007101618590 A CN2007101618590 A CN 2007101618590A CN 200710161859 A CN200710161859 A CN 200710161859A CN 101153667 B CN101153667 B CN 101153667B
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CN
China
Prior art keywords
valve
spring part
main body
variant part
body block
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Expired - Fee Related
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CN2007101618590A
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Chinese (zh)
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CN101153667A (en
Inventor
本田伸
小林和人
茂木隆
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Denso Corp
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Denso Corp
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Publication of CN101153667A publication Critical patent/CN101153667A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/33—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
    • F25B41/335—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant via diaphragms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/068—Expansion valves combined with a sensor
    • F25B2341/0683—Expansion valves combined with a sensor the sensor is disposed in the suction line and influenced by the temperature or the pressure of the suction gas

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)
  • Lift Valve (AREA)

Abstract

An expansion valve for a refrigerant cycle has an orifice passage portion, a valve body, a spring member and a deformation portion. The orifice passage portion is configured for decompressing and expanding a high pressure refrigerant into a low pressure refrigerant. The valve body is disposed to open and close the orifice passage portion so that a flow rate of the low pressure refrigerant flowing into a low pressure passage portion is controlled in accordance with a valve opening degree. The spring member is disposed between the valve body and the deformation portion for applying a biasing force to the valve body. The deformation portion is plastically deformable in a direction parallel to an expansion and contraction direction of the spring member by applying an external force.

Description

Expansion valve
Technical field
The present invention relates to a kind of expansion valve (expansion valve) that is used for refrigerant cycle (refrigerant cycle).
Background technique
Be used for the expansion valve of refrigerant cycle generally comes control valve by the temperature and pressure that detects refrigeration agent at least aperture, be controlled at flowing of refrigeration agent in the refrigerant cycle thus.For example, the temperature and pressure of the refrigeration agent by detecting low voltage side, pattern of fever (thermal-type) expansion valve that refrigeration agent controls under the predetermined condition is known substantially.In addition, the expansion valve of controlling refrigeration agent by the condition that detects on high-tension side refrigeration agent generally is as pressure controlled valve and known.
For example, the open No.2002-3 10538 (US 6560982 B2) of Japanese unexamined patent publication No. discloses a kind of pattern of fever expansion valve with ball valve.In disclosed expansion valve, high-pressure channel and low-pressure channel are setovered at the longitudinal direction of main body block, and interconnect by hole path.That is, disclosed expansion valve has the coolant channel of crank shape in main body block.Hole path extends at longitudinal direction, and operating stem is set in the hole path, and this operating stem has the diameter littler than the internal diameter of hole path.Operating stem is provided with ball valve in its end, is used for the control hole passage.That is, along with operating stem moves in hole path in a longitudinal direction, hole path is opened or closed by ball valve.
Hole path and the open communication that is formed on the top of main body block.When expansion valve is assembled, be inserted in the hole path with the opening of the incorporated operating stem of ball valve from main body block.Particularly, be placed at valve base piece (valve seating member) under the condition of periphery of operating stem, for example by welding, the end of ball valve and operating stem forms as one.Then, the operating stem with valve base piece and ball valve is inserted into into hole path.Simultaneously, valve base piece is press fit in the hole path by the large-diameter portion branch of operating stem.
Operating stem and other members are inserted through in this kind expansion valve of opening of main body block therein, reduced the quantity of component parts, and component parts are easy to assembling.Therefore, be easy to improve assembly precision.Yet when ball valve was soldered, the length of operating stem can change.In addition, when valve base piece was press fit, operating stem can be out of shape.If above-mentioned situation takes place, the aperture characteristic of maintaining valve is very difficult in the predetermined characteristics scope.
Summary of the invention
In expansion valve, proposed to utilize regulating mechanism to adjust the aperture characteristic of valve before in shipment (shipment).Further, wish that regulating mechanism can simply adjust the characteristic of valve opening under the prerequisite of the quantity that does not increase cost and component parts.
Problem above having considered has been created the present invention, the purpose of this invention is to provide a kind of expansion valve, and wherein the valve opening characteristic can be adjusted by simple structure.
According to an aspect of the present invention, the expansion valve that is used for refrigerant cycle has high-pressure channel portion, and high-pressure refrigerant stream is by this high-pressure channel portion; Hole path, this hole path is communicated with high-pressure channel portion; And low-pressure channel portion, this low-pressure channel portion is communicated with hole path.The high-pressure refrigerant that flows out from high-pressure channel portion is depressurized and is expanded to low pressure refrigerant in hole path, and low pressure refrigerant flows into low-pressure channel portion.Expansion valve further has valve body, spring part and variant part.Valve body is configured to open and close hole path, thereby makes the flow of the low pressure refrigerant flow into low-pressure channel portion according to the aperture of hole path and controlled.Spring part is set between valve body and the variant part, is used for biasing force is applied to valve body.Variant part is being parallel to the direction plastically deformable that spring part stretches and shrinks by the power that applies.
Variant part is by applying external force plastically deformable on the direction that spring part stretches and shrinks.By with variant part distortion, thereby make the distance between valve body and variant part reduce, promptly on the shrinkage direction of spring part, the biasing force that spring part is applied to valve body increases.On the other hand, by with deformable body distortion, thereby make the distance between valve body and the distortion increase, promptly on the direction of extension of spring part, the biasing force that spring part is applied to valve body reduces.That is, by variant part is being parallel to the direction distortion that spring part stretches and shrinks, the biasing force of spring part is adjusted.Therefore, the aperture of valve body is adjusted, to have predetermined characteristics.So, the characteristic of valve opening is adjusted suitably by the simple structure of this kind.
For example, variant part is integral in the main body block, and this main body block is held spring part within it.That is, variant part is formed when main part forms.Alternatively, variant part provides by the distortion plate, and this distortion plate is individually formed from main body block.The distortion plate is fixed on the opening portion of main body block portion, and is deformed, thereby makes spring part have predetermined biasing force.
Description of drawings
By the detailed description below with reference to accompanying drawing, other purpose of the present invention, feature and advantage become apparent, and wherein identical parts are represented by identical reference character, wherein:
Fig. 1 is the cross sectional representation according to the pattern of fever expansion valve that is used for refrigerant cycle of the first embodiment of the present invention;
Fig. 2 is the amplification cross-sectional view according to the part of first embodiment's expansion valve;
Fig. 3 is the figure that shows according to relation first embodiment, between the variable quantity of the amount of movement of adjusting anchor clamps (adjustmetjig) and setting value;
Fig. 4 is the amplification cross-sectional view of the part of the expansion valve with tubular protrusion according to a second embodiment of the present invention;
Fig. 5 is a third embodiment in accordance with the invention, have the amplification cross-sectional view of a part of expansion valve of the peripheral wall of band female thread;
Fig. 6 is the amplification cross-sectional view as the part of the expansion valve of the deformable sheet of variant part of having of a fourth embodiment in accordance with the invention; And
Fig. 7 is the cross sectional representation of a part that has the expansion valve of ball valve according to a fifth embodiment of the invention.
Embodiment
Below with reference to Fig. 1 to 3 explanation first embodiment of the present invention.Fig. 1 has shown pattern of fever expansion valve 1 (back simply is called expansion valve 1).Expansion valve 1 is used in the refrigerant cycle substantially, and described refrigerant cycle is used for the liquid phase high-pressure refrigerant step-down of will flow out from condenser 2 and is expanded to low pressure refrigerant, then low pressure refrigerant is incorporated in the vaporizer 3.In addition, expansion valve 1 is adjusted the aperture of its valve according to the degree of superheat of the refrigeration agent that flows out from vaporizer 3, and control is incorporated into the flow of the low pressure refrigerant in the vaporizer 3 thus.
In refrigerant cycle, refrigeration agent flows according to following mode.At first, compressed high-pressure refrigerant flows through condenser 2 in compressor 4.When flowing through condenser 2, high-pressure refrigerant is owing to heat exchange becomes the liquid phase high-pressure refrigerant.
Then, the liquid phase high-pressure refrigerant is depressurized in expansion valve 1 and expands, and becomes the gas-liquid two-phase low pressure refrigerant.After this, owing to heat exchange becomes the gas phase low pressure refrigerant, the gas phase low pressure refrigerant is inhaled into compressor 4 to the two-phase low pressure refrigerant then in vaporizer 3.
Expansion valve 1 generally has main body block 100 and dynamical element 400.Main body block 100 comprises overheated sense channel 200 and relief passage 300.In overheated sense channel 200 and the relief passage 300 each extends through main body block 100 on the direction of cardinal principle perpendicular to the longitudinal direction of main body block 100.Overheated sense channel 200 and relief passage 300 are aligned with each other on the longitudinal direction of main body block 100.
This passage is positioned at the overheated sense channel 200 above the relief passage 300 in Fig. 1, and the gas phase low pressure refrigerant that flows out from vaporizer 3 flows to compressor 4.Overheated sense channel 200 is configured to detect the degree of superheat of the gas phase low pressure refrigerant that flows therein.
The liquid phase high-pressure refrigerant that flows out from condenser 2 flows in relief passage 300.Relief passage 300 is set for the step-down of liquid phase high-pressure refrigerant and is expanded to low pressure refrigerant, then low pressure refrigerant is arranged to vaporizer 3.
Main body block 100 has opening 110 in the end of contiguous overheated sense channel 200.Opening 110 is communicated with overheated sense channel 200.Dynamical element 400 is installed to opening 110.Dynamical element is constructed to according to detected degree of superheat control in overheated sense channel 200 as the valve opening of the guiding valve (spool valve) 600 of valve body.
Dynamical element 400 generally has shell 410 and barrier film 420.Barrier film 420 is accommodated in the shell 410, thereby makes the interior space of shell 410 be divided into two chambers on the longitudinal direction of main body block 100.One of them chamber promptly near the chamber of main body block 100, is called as downforce chamber 440, another chamber, and promptly farther than downforce chamber 440 with respect to main body block 100 chamber is called as upward pressure chamber 430.
Upward pressure chamber 430 is filled with saturated refrigeration agent and is sealed by stopper 431.The temperature of the refrigeration agent by overheated sense channel 200 is detected by the refrigeration agent in first pressure chamber 430, and is applied on the barrier film 420 according to the saturation pressure (saturation pressure) of detected temperature.In downforce chamber 440, stop (stopper member) 441 is received under its outer peripheral portion branch is inserted situation between shell 410 and the barrier film 420.
Shell 410 has tube in its lower end.Outer screw section 411 is formed on the outer surface of tube.Outer screw section and 111 engagements of female thread portion, this female thread portion is formed on the wall of the opening 110 that limits main body block 100.
The tube of shell 410 has opening 412.Shell 410 is set on the main body block 100, thereby makes the opening 412 of shell 410 be connected with the opening 110 of main body block 100.Therefore, the refrigeration agent by overheated sense channel 200 can arrive stop 441 by opening 110,412.That is to say that stop 441 can be accepted the pressure by the refrigeration agent of overheated sense channel 200.
Therefore, the saturation pressure of the refrigeration agent of upward pressure chamber 430 is applied on the barrier film 420 with the refrigerant pressure that is applied on the stop 441.Therefore, barrier film 420 promptly moves on the longitudinal direction of main body block 100 up and down in response to the difference between saturation pressure and the refrigerant pressure.The position of stop 441 is determined by the motion of barrier film 420.
Therefore, when the difference between saturation pressure and refrigerant pressure increased, stop 441 moved down, and just moves towards main body block 100.On the other hand, when described difference reduced, stop 441 moved up, and just with towards the opposite direction of main body block 100 moved.Therefore, when the degree of superheat increased, stop 441 moved down.When the degree of superheat reduced, stop 441 moved up.
Operating stem 450 is connected to stop 441, is used for the transmission of movement of stop 441 to the guiding valve 600 that is arranged in the relief passage 300.The overheated sense channel 200 of operating stem 450 extend throughs, and be connected to guiding valve 600.Operating stem 450 can moving with stop 441.Therefore, operating stem 450 is to apply biasing force to guiding valve 600 on the direction opened of valve in downward direction.
Relief passage 300 comprises high-pressure channel portion 310, low-pressure channel portion 320 and as the smaller diameter passage portion 330 of communication passage portion.High-pressure channel portion 310 and low-pressure channel portion 320 be biasing mutually on the longitudinal direction of main body block 100.High-pressure channel portion 310 and low-pressure channel portion 320 interconnect by smaller diameter passage portion 330, and this smaller diameter passage portion 330 extends on the longitudinal direction of main body block 100.
High-pressure channel portion 310 is configured to allow the liquid phase high-pressure refrigerant from condenser 2 flows out to flow to smaller diameter passage portion 330.In smaller diameter passage portion 330, the high pressure liquid phase refrigerant is by step-down and expansion.Low-pressure channel portion 320 is positioned at the position higher than high-pressure channel portion 310.Low-pressure channel portion 320 is set for the low pressure refrigerant that permission flows out from smaller diameter passage portion 330 and flows to vaporizer 3.
Guiding valve 600 is set in the smaller diameter passage portion 330.In addition, spring part 700 is set in the smaller diameter passage portion 330, is used on the direction that makes progress guiding valve 600 being applied power.In example shown in Figure 1, the direction that makes progress is corresponding to the valve closing direction that is used for cut-off valve, and the direction opened corresponding to the valve that is used to open valve of downward direction.Direction up and down, i.e. the longitudinal direction of main body block 11 stretches and the direction of compression corresponding to spring part 700.
In this embodiment, spring part 700 promptly under the condition in precompressed, is set in the smaller diameter passage portion 330 under the condition of compression.Here, the direction that stretches corresponding to spring part 700 of the valve direction of closing.The direction that valve is opened is corresponding to the compression direction of spring part 700.The external diameter of guiding valve 600 and the external diameter of spring part equate substantially with the internal diameter of smaller diameter passage portion 330 substantially.
Guiding valve 600 is formed with hole path 610.Hole path 610 has the shape of T shape substantially, and allows the connection between high-pressure channel portion 310 and low-pressure channel portion 320.Hole path 610 is set for the high pressure liquid phase refrigerant that reduces pressure and expand and flow out from high-pressure channel portion 310 within it, and the low pressure refrigerant that will reduce pressure and expand is discharged into low-pressure channel portion 320.In addition, guiding valve 600 is formed with outer periphery groove 620 at the periphery on the top of T shape hole path 610 (refrigeration agent discharge section) 611.
Guiding valve 600 is removable along direction up and down in smaller diameter passage portion 330.When up and down direction moved, the connection area between circumferential groove 620 and the low-pressure channel 320 changed outside at guiding valve 600.By this mechanism, the amount that flow into the low pressure refrigerant in the low-pressure channel portion 320 is controlled.
Just, when guiding valve 600 is on the downward direction when mobile in the direction that valve is opened, the connection area between circumferential groove 620 and the low-pressure channel 320 increases outside.That is, valve opening increases.So, flow into the amount increase of the low pressure refrigerant in the low-pressure channel portion 320.
On the other hand, when guiding valve 600 is mobile on the direction that the direction that valve cuts out promptly makes progress, is communicated with area and reduces.Just, valve opening is reduced.So, the amount that flow into the low pressure refrigerant in the low-pressure channel portion 320 reduces.Therefore, it is controlled by the aperture of guiding valve 600 to flow into the amount of the low pressure refrigerant in the low-pressure channel portion 320.
Spring part 700 is set in the smaller diameter passage portion 330 under guiding valve 600, is used in the direction that makes progress guiding valve 600 being applied power.Spring part 700 for example is a wind spring.Further, in smaller diameter passage portion 330, spring seat member 710 is set at the lower end of spring part 700.Spring seat member 710 is set for the stability that improves spring part 700, and is used to limit main body block 110 and is cut owing to the rotation of spring part 700 or is damaged.
Main body block 100 has variant part 120 at the lower position of smaller diameter passage portion 330.This variant part 120 promptly passes through the effect plastically deformable of external force on the direction that valve cuts out in the direction that makes progress.Variant part 120 is thin-walleds, this thin-walled with respect to up and down direction promptly on the direction that valve opens and closes the wall than its periphery in main body block 100 thinner.
Spring part 700 is set between guiding valve 600 and the variant part 120.Therefore, variant part 120 plays the effect that is used to accept from the base of the load of spring part 700.Variant part 120 has preset thickness and size (for example, area), thus make variant part 120 up and down direction be parallel to promptly that spring part 700 stretches and the direction of compression on removable.In addition, variant part 120 is removable in such scope, and the initial load (for example precompression) that promptly is applied to spring part 700 can change.
Further, variant part 120 is removable in such scope, and promptly the characteristic of expansion valve 1 is adjusted in manufacture process.Be stabilized in main body block 100 under the condition of ground clamping, variant part 120 is formed on the position that the adjustment anchor clamps 800 as the instrument that is used to be out of shape can arrive easily.Variant part 120 is thinner than its periphery in main body block 100.
Main body block 100 has polyhedral shape substantially.Variant part 120 is positioned in the groove, and this groove is formed on the middle part place of cardinal principle of the side in the polyhedron-shaped side.For example, variant part 120 is positioned in the groove on the diapire that is formed on main body block 100.This groove limits by the outer surface of peripheral wall 130 and variant part 120.
The internal surface of variant part 120, just, the upper surface of variant part 120 serves as accepts surperficial 120A, and this accepts the load of surface acceptance from spring part 700.In other words, accept the power that surperficial 120A is used for applying to guiding valve 600 spring part 700.The outer surface of variant part 120 is that the lower surface of variant part 120 serves as working surface 120B, and this working surface is by accepting external force such as the adjustment anchor clamps 800 of piston (plunger).Each that accept among surperficial 120A and the working surface 120B for example is round-shaped.
Peripheral wall 130 is coaxial with variant part 120.The diameter of peripheral wall 130 is bigger than the external diameter of accepting surperficial 120A.That is, working surface 120B is relatively bigger than accepting surperficial 120A.
Expansion valve 1 described above is assembled according to following mode.At first, spring seat member 710, spring part 700 and guiding valve 600 are placed in the smaller diameter passage portion 330 by opening 100 in this order.Then, dynamical element 400 is screw in the opening 110 of main body block 100.
After assembly was assembled with top mode, variant part 120 was deformed, to adjust the control characteristic of guiding valve 600.In first embodiment, after all constituents related with the moveable part of expansion valve 1 assembled, carry out set-up procedure.
In expansion valve 1, the aperture of guiding valve 600 is to control with following mode.When the degree of superheat of the refrigeration agent that flows out from vaporizer 3 raise, the pressure difference in dynamical element 400 increased.So, operating stem 450 is prevented from part 441 and promotes in downward direction.That is operating stem 450 biased spool valve 600 on downward direction.
Therefore, guiding valve 600 effect that overcomes spring part 700 in smaller diameter passage portion 330 on downward direction is moved.Therefore, the connection area between the outer periphery groove 620 of low-pressure channel 320 and hole path 610 increases.Just, valve opening increases.Therefore, flow to the amount increase of the low pressure refrigerant of low-pressure channel portion 320.
On the other hand, when the degree of superheat of the refrigeration agent that flows out from vaporizer 3 reduced, the pressure difference in dynamical element 400 reduced.So, operating stem 450 is prevented from part 441 upward to promotion.Therefore, the biasing force of biased spool valve 600 is reduced in downward direction.Therefore, guiding valve 600 is moving in the direction that makes progress in smaller diameter passage portion 330 under the effect of the power of spring part 700.Thus, the connection area between low-pressure channel 320 and outer periphery groove 620 increases.Just, valve opening reduces.Therefore, the amount that flows to the low pressure refrigerant of low-pressure channel portion 320 reduces.
In this embodiment, the spring-back force of spring part 700 (biasing force) is adjusted, so that the characteristic of valve opening is positioned at predetermined scope.The adjustment of the biasing force of spring part 700 makes variant part 120 realize in the direction plastic deformation that makes progress by utilizing adjustment anchor clamps 800.
At first, adjusting anchor clamps 800 aligns with the working surface 120B of variant part 120.Simultaneously, be inserted in the peripheral wall 130, adjust anchor clamps 800 relative deformation portions 120 and suitably located owing to adjust anchor clamps 800.
Adjusting under anchor clamps 800 and the condition that the working surface 120B of variant part 120 contacts, the adjustment anchor clamps are moved in the direction that makes progress.So, variant part is out of shape in the direction that makes progress under the effect by the power of adjusting anchor clamps 800 generations, therefore accepts surperficial 120A and moves up.Because working surface 120B is more relatively large than accepting surperficial 120A, the distortion of variant part 120 entirely is applied to be accepted on the surperficial 120A.Therefore, accepting surperficial 120A entirely moves in the direction that makes progress.
As a result, reduce in the distance of accepting between surperficial 120A and the guiding valve 600.Therefore, the biasing force that is used for the spring part 700 of biased spool valve 600 on the direction that valve cuts out is adjusted increase.In this way, the valve opening characteristic of guiding valve 600 is adjusted.
Here, the characteristic of the spring part 700 of setting is scheduled to.The amount of movement that need be used for the acceptance surface 120A of setting property also is scheduled to.Therefore, in set-up procedure, adjust anchor clamps 800 and move predetermined amount according to the predetermined amount of movement of accepting surperficial 120A.
For example, the thickness t 1 of variant part 120 is 1mm, and the diameter phi of variant part 120 is 14mm.Fig. 3 has shown the relation of the variable quantity of the amount of movement of adjustment anchor clamps 800 of the variant part 120 that is used to have last face thickness and diameter and spring part 700 setting values (initial spring-back force).
As shown in Figure 3, when the amount of movement of adjusting anchor clamps 800 during less than 0.8mm, the variable quantity of setting value is proportional with amount of movement substantially.Therefore, when setting value need change in 0 to 40kPa scope, adjust anchor clamps 800 and move corresponding amount.
The thickness t 1 and the diameter phi of variant part 120 are not limited to top value, but thickness can change between the scope of 2mm at 0.5mm, and diameter can change in the scope of 20mm at 7mm.In these thickness ranges and diameter range, the motion of adjusting anchor clamps 800 has the relation similar to relation as shown in Figure 3 with setting value.
When thickness t 1 was bigger than 2mm, just when thickness was big with respect to diameter phi, variant part 120 was indeformable substantially, was increased even adjust the amount of movement of anchor clamps 800.Therefore, in this case, the setting value of adjusting spring part 700 is very difficult to desired set value.
On the other hand, when thickness t 1 during less than 0.5mm, just, when thickness t 1 with respect to diameter phi hour, the rigidity of variant part 120 reduces.Therefore, even variant part 120 is adjusted anchor clamps 800 distortion, variant part 120 is because spring part 700 and under the effect of the pressure of the refrigeration agent of smaller diameter passage portion for example, and might be pushed back in downward direction.So, be deformed into predetermined amount even work as variant part 120, keeping setting value is difficult in desired set value.
During scope above the thickness t 1 of variant part 120 and diameter phi are positioned at, the setting value of spring part 700 is suitably set according to the amount of movement of adjusting anchor clamps 800.
As mentioned above, on the direction that makes progress, make variant part 120 distortion by utilizing adjustment anchor clamps 800, and the biasing force of spring part 700 on the direction that valve cuts out increased.Because the biasing force of spring part 700 is adjusted by the distortion of variant part 120, so the characteristic of valve opening is adjusted to predetermined characteristics.
Further, because the setting value of spring part 700 is adjusted by the distortion of variant part 120, therefore be used to adjust the required structure of setting value and be simplified.In addition, even by simple structure, the adjustment of setting value also can suitably be carried out.
Variant part 120 provides by the thinner wall section of main body block 100.That is, do not need to provide individually variant part 120.So, structure is further simplified.
In addition because working surface 120B is more relatively large than accepting surperficial 120A, therefore accept surperficial 120A in the direction that makes progress by whole distortion.Just, accept the unlikely partly distortion of surperficial 120A.
Main body block 100 has the peripheral wall 130 coaxial with variant part 120.Therefore, adjusting anchor clamps 800 easily and is suitably located with respect to variant part 120.Therefore, make variant part 120 suitably be out of shape.
(second embodiment)
Below in conjunction with Fig. 4 second embodiment is described.In this embodiment, variant part 120 is formed on the diapire of main body block 100.Working surface 120B is set up by the part of the bottom surface of main body block 100.Main body block 100 has tubular protrusion 140, and this tubular projection is extended from working surface 120B.Tubular protrusion 140 surface within it has female thread part 140A, thereby makes adjustment anchor clamps 800 by in the precession tubular protrusion 140.When main body block 100 was formed, tubular protrusion 140 formed as one with main body block 100.
Tubular protrusion 140 serves as operation unit, be used for upward to at least one direction of downward direction on movement and deformation portion 120.For example, tubular protrusion 140 is positioned at the center of variant part 120.Tubular protrusion 140 extends on the direction of the movement direction that is parallel to variant part 120.Variant part 120 can move on the direction of extension of spring part 700 and one or two direction in the shrinkage direction.
Adjust anchor clamps 800 and be formed with male screw portion 800A, thereby make adjustment anchor clamps 800 be screwed in the female thread part 140A of tubular protrusion 140 at its outer surface.Adjust under anchor clamps 800 and the condition that tubular protrusion 140 combines, it is mobile on a direction in the direction at least up or down to adjust anchor clamps 800.
When adjustment anchor clamps 800 move up, the direction distortion that variant part 120 is making progress.Therefore, accepting surperficial 120A moves in the direction that makes progress.On the other hand, when adjustment anchor clamps 800 moved down, variant part 120 was in downward direction distortion.Therefore, accepting surperficial 120A moves in downward direction.
Therefore, can be owing to accept surperficial 120A upward to being out of shape with the downward direction both direction, the biasing force of spring part 700 is adjusted at both direction, just, is adjusted in the mode that increases and reduce.
(the 3rd embodiment)
Below with reference to Fig. 5 the third embodiment of the present invention is described.In this embodiment, main body block 100 has groove part in its bottom, and variant part 120 provides by the wall that limits groove part.As shown in Figure 5, peripheral wall 130 is formed with female thread part 130A, and the male screw portion 800A that adjusts anchor clamps 800 is by this female thread part of precession.
Here, the depth of groove among depth ratio first embodiment of groove part is big.Further, depth of groove is bigger than the diameter of variant part 120.
The direction distortion that variant part 120 is making progress by adjusting anchor clamps 800 and being screwed in the groove part.In this case, by adjusting the required little power of power of anchor clamps 800, make variant part 120 distortion than simple moving among first embodiment.So, variant part 120 easily is out of shape by dingus, and need be such as the large equipment of extrusion press.
(the 4th embodiment)
Below with reference to Fig. 6 the 4th embodiment is described.As shown in Figure 6, main body block 100 is formed with opening portion 150 in its bottom.Opening portion 150 is positioned at the bottom of smaller diameter passage portion 330, and is communicated with smaller diameter passage portion 330.Opening portion 150 is coaxial with smaller diameter passage portion 330, and has the internal diameter bigger than the internal diameter of smaller diameter passage portion 330.That is, opening portion 150 is formed on the position relative with guiding valve 600, and the internal diameter of opening portion 150 is bigger than the external diameter of spring part 700.
Further, the distortion plate 160 that has with the corresponding shape of interior shape of opening portion 150 for example is fixed in the opening portion 150 in the mode of extruding.For example, distortion plate 160 has cup-shaped substantially shape.Distortion plate 160 is fixed on the main body block 100, makes the opening surface of cup-shaped distortion plate 160 to spring part 700.
That is, opening portion 150 forms groove part, and distortion plate 160 is fixed in the groove part.Therefore, distortion plate 160 serves as variant part 120.Therefore, the setting value of spring part 700 adjusts 160 distortion of distortion plate by utilizing adjustment anchor clamps 800.So, the valve opening characteristic is adjusted.
In this structure, the diameter that will be out of shape plate 160 at an easy rate increases.Therefore, this structure is suitable for increasing amount of deformation, just increases adjustment range.
(the 5th embodiment)
Below with reference to Fig. 7 the 5th embodiment is described.In the 5th embodiment, expansion valve 1 has the ball valve 900 of alternative guiding valve 600.Below the structure that is different from top embodiment will be described mainly.
As shown in Figure 7, first valve base piece 910 is set at above the spring part 700 in smaller diameter passage portion 330, is used to support ball valve 900.In addition, second valve base piece 920 for example is set in smaller diameter passage portion 330 above first valve base piece 910 in the mode of extruding.
Second valve base piece 920 is formed with through hole 921.This through hole 921 extends on the axial direction of smaller diameter passage portion 330.Operating stem 450 contacts with ball valve 900 by through hole 321, and this ball valve is set between first valve base piece 910 and second valve base piece 920.Second valve base piece 920 further is formed with open communication 922, and this open communication is extended perpendicular to through hole 921.Open communication 922 is configured to be communicated with low-pressure channel portion 320.
Allow the lower area of the through hole 921 of connection between high-pressure channel portion 310 and the open communication 922 to be provided with hole path 921A, be used for step-down and expansion high-pressure refrigerant.Ball valve 900 is constructed to open and close the import of hole path 921A.That is, the flow that flows to the low pressure refrigerant of low pressure refrigerant passage 320 is adjusted via the import aperture of ball valve 900 control hole passage 921A.
Also in the present embodiment, similar to first embodiment, main body block 100 is formed with variant part 120 and peripheral wall 130 in the bottom of smaller diameter passage portion 330.So, the valve opening characteristic mode similar to first embodiment is adjusted.Alternatively, variant part 120 and peripheral wall 130 can with to second to the 4th embodiment in any similar mode be provided with.
(other embodiments)
Various exemplary embodiment of the present invention has been described above.Yet, the invention is not restricted to exemplary embodiment described above, but can implement with various other modes not deviating under the spirit of the present invention.
For example, top embodiment can be changed according to following mode.In first embodiment, peripheral wall 130 and variant part 120 cavities formed co-axial.Yet peripheral wall 130 can be removed.Just, working surface 120B can form with the diapire of main body block 100 and align.
In first embodiment, working surface 120B is bigger relatively than accepting surperficial 120A.Alternatively, working surface 120B can have identical size with the surperficial 120A of acceptance, and is perhaps little than accepting surperficial 120A.
In first embodiment, variant part 120 is out of shape by moving adjustment anchor clamps 800, for example passes through squeezing unit.Yet variant part 120 can be deformed with other device.For example, distortion 120 can be knocked by the other instrument of utilization such as hammer and is out of shape.
In a second embodiment, the internal diameter of tubular protrusion 140 is littler than the internal diameter of smaller diameter passage portion 330.Alternatively, the internal diameter of tubular protrusion 140 can be the same with the internal diameter of smaller diameter passage portion 330.In this case, variant part 120 whole distortion on direction up and down.
In the 4th embodiment, the internal diameter of opening portion 150 is bigger than the internal diameter of smaller diameter passage portion 330.Alternatively, the internal diameter of opening portion 150 is identical or littler with the internal diameter of smaller diameter passage portion 330.
In the above embodiments, expansion valve 1 is constructed to, and valve opening is controlled by the state of the valve operating system detection low pressure refrigerant of utilization such as dynamical element 400.Yet the present invention can be applied to come the expansion valve of control valve aperture based on the state of the high-pressure refrigerant that detects by valve operating system.Further, the present invention can be by implementing in conjunction with top embodiment in every way.

Claims (12)

1. expansion valve that is used for refrigerant cycle comprises:
High-pressure channel portion, described high-pressure channel portion allow high-pressure refrigerant to flow;
Orifice passage portion, described orifice passage portion are arranged to be communicated with described high-pressure channel portion, are used for the high-pressure refrigerant step-down of will flow out from described high-pressure channel portion and are expanded to low pressure refrigerant;
Low-pressure channel portion, described low-pressure channel portion is arranged to be communicated with described orifice passage portion, is used to allow low pressure refrigerant to flow;
Valve body, described valve body is arranged to open and close described orifice passage portion, so that it is controlled according to the aperture of described valve body to flow to the flow of low pressure refrigerant of low-pressure channel portion;
Spring part, described spring part are arranged to biasing force is applied to described valve body; And
Variant part, described variant part is arranged on the opposite side of described valve body with respect to described spring part, so that described spring part is inserted between described variant part and the described valve body, wherein
Described variant part is by external force plastically deformable on the direction that is parallel to described spring part stretching, extension and shrinks, described variant part plays the effect that is used to receive from the base of the load of described spring part, and described variant part is removable in such scope, and the initial load that promptly is applied to described spring part can change.
2. expansion valve as claimed in claim 1 further comprises:
Main body block, wherein
Described spring part is contained in the described main body block, and
Described variant part is by the wall setting of described main body block, on the direction that stretches and shrink with respect to described spring part, the thickness of this wall is less than the thickness of the neighboring area in the main body block.
3. expansion valve as claimed in claim 1 further comprises:
Main body block, described main body block is held described spring part within it, and described main body block has opening portion in the position relative with described valve body; And
The distortion plate, described distortion plate has and the corresponding shape of described opening portion, wherein
Described distortion plate is set in the described opening portion and is fixed on the described main body block, and
Described variant part is provided with by described deformed plate member.
4. expansion valve as claimed in claim 3, wherein
Described opening portion has the internal diameter greater than the external diameter of spring part, and the external diameter of described spring part is defined on the direction of the direction that stretches and shrink perpendicular to spring part.
5. as each the described expansion valve in the claim 2 to 4, wherein
Described variant part has the second surface that external force is applied to the first surface on it and accepts described spring part, and
The area of described first surface is equal to or greater than the area of described second surface.
6. expansion valve as claimed in claim 5, wherein
The thickness of described variant part is 0.5mm at least and is at most 2mm, and
Described second surface has to be 7mm at least and to be at most the external diameter of 20mm.
7. expansion valve as claimed in claim 5, wherein
Described main body block has peripheral wall part, and this peripheral wall part is coaxially extended from the first surface of described wall.
8. expansion valve as claimed in claim 7, wherein
Described peripheral wall part has the screw section, can be screwed into described peripheral wall part so that be used to apply the adjustment anchor clamps of external force.
9. expansion valve as claimed in claim 2, wherein
Described main body block has from the outstanding tubular protrusion of described variant part, and
Described tubular protrusion comprises the screw section, can be screwed into described tubular protrusion so that be used to apply the adjustment anchor clamps of external force.
10. expansion valve that is used for refrigerant cycle comprises:
Main body block, described main body block has high-pressure channel portion, low-pressure channel portion and the communication passage portion between described high-pressure channel portion and low-pressure channel portion;
The valve element, described valve element is arranged in the communication passage portion, thereby hole path is defined, so that the high-pressure refrigerant decompression that will flow out from high-pressure channel portion and be expanded to low pressure refrigerant and flow into the flow of low-pressure channel portion according to the aperture control low pressure refrigerant of this hole path;
Spring part, described spring part is arranged in the communication passage portion, is used to apply biasing force to described valve element; And
Variant part, described variant part is arranged on a side relative with described valve element with respect to described spring part, to limit the end of described communication passage portion, wherein
Described spring part is arranged between valve element and the variant part, and the setting value of described spring part is adjusted by make described variant part distortion prearranging quatity on the direction that is parallel to described spring part stretching, extension and shrinkage direction, described variant part plays the effect that is used to receive from the base of the load of described spring part, and described variant part is removable in such scope, and the initial load that promptly is applied to described spring part can change.
11. expansion valve as claimed in claim 10, wherein
Described variant part is integral in the described main body block, and has preset thickness on the direction that is parallel to described spring part stretching, extension and shrinkage direction.
12. as claim 10 or 11 described expansion valves, wherein
Described main body block has groove part at its outer wall and in the position relative with communication passage portion with respect to variant part, holds the adjustment anchor clamps when being out of shape with the described variant part of box lunch.
CN2007101618590A 2006-09-25 2007-09-24 Expansion valve Expired - Fee Related CN101153667B (en)

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US9188375B2 (en) * 2013-12-04 2015-11-17 Zhejiang Dunan Hetian Metal Co., Ltd. Control element and check valve assembly
US10145594B2 (en) * 2016-02-03 2018-12-04 Dunan Microstaq, Inc. Expansion valve
JP6453263B2 (en) * 2016-03-15 2019-01-16 株式会社鷺宮製作所 Heat pump device using slide valve
JP6846875B2 (en) * 2016-04-26 2021-03-24 株式会社不二工機 Expansion valve
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CN108253159A (en) * 2016-12-29 2018-07-06 比亚迪股份有限公司 Expand switch valve
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