CN107208819B - Throttling set and refrigerating circulation system - Google Patents
Throttling set and refrigerating circulation system Download PDFInfo
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- CN107208819B CN107208819B CN201680008244.1A CN201680008244A CN107208819B CN 107208819 B CN107208819 B CN 107208819B CN 201680008244 A CN201680008244 A CN 201680008244A CN 107208819 B CN107208819 B CN 107208819B
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- valve
- guiding parts
- sliding contact
- spool
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- 230000004087 circulation Effects 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 239000003507 refrigerant Substances 0.000 claims description 53
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000006837 decompression Effects 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 abstract description 11
- 238000003780 insertion Methods 0.000 description 23
- 230000037431 insertion Effects 0.000 description 23
- 230000002093 peripheral effect Effects 0.000 description 21
- 239000011148 porous material Substances 0.000 description 14
- 238000005520 cutting process Methods 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000755266 Kathetostoma giganteum Species 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/34—Excess-flow valves in which the flow-energy of the flowing medium actuates the closing mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Details Of Valves (AREA)
- Lift Valve (AREA)
- Safety Valves (AREA)
Abstract
The present invention provides the throttling set and refrigerating circulation system that can inhibit the generation of abnormal sound.Throttling set (10) has the valve base part (2) with valve port (21), the needle-valve (4) for keeping the aperture of valve port (21) variable, and the guiding parts (3) of the tubular of guidance needle-valve (4) advance and retreat, it is respectively formed with via defined gap and opposed and be capable of the sliding contact surface (34 of sliding contact each other in needle-valve (4) and guiding parts (3), 46), gap becomes the intermediate flow passage (45) for making fluid circulate from valve port (21) towards secondary side, sliding contact surface (46) in needle-valve (4) forms the concave groove (47) as flow path expansion section to expand the width dimensions of intermediate flow passage (45) in direction of the sliding contact surface (34) of oriented separate guiding parts (3).
Description
Technical field
The present invention relates to throttling set and refrigerating circulation systems.
Background technique
Now, as one of throttling set, a kind of refrigerant for refrigerating cycle to the high pressure from primary side is proposed
(fluid) carries out decompression and to the decompressor (sometimes referred to as pressure reducing valve, expansion valve) of secondary side submitting (for example, referring to patent
Document 1).Decompressor documented by patent document 1 is refrigerant of the valve opening according to condenser (radiator) side (primary side)
Pressure and vaporizer side (secondary side) refrigerant pressure differential pressure and the differential pressure type expansion valve that changes.
The decompressor has: the shell with inflow entrance and outflux；The shell can be movably supported on
Carry out the spool that the aperture of the valve port of convection current entrance side is adjusted in vivo；And to the inflow entrance side as valve closing direction to the valve
The helical spring that core exerts a force.The cylindric guiding skirt that spool is guided with the inner peripheral surface sliding contact with shell
Portion is formed with the hole for making refrigerant circulate in the guiding skirt section.In such decompressor, flowed into shell from valve port
Refrigerant from hole be imported into guiding skirt section inside, guiding skirt section inside flow through cocurrent to secondary side, thus from outflux stream
Out.
Existing technical literature
Patent document
Patent document 1: No. 3528433 bulletins of Japanese Patent No.
Summary of the invention
Problems to be solved by the invention
In existing decompressor, the refrigerant for flowing through the hole of spool is imported into inside guiding skirt section and to secondary effluent
It is logical, but the mutual sliding contact of inner peripheral surface of outer peripheral surface and shell due to being configured to be oriented to skirt section, so there is refrigerant also to it
A possibility that gap flows into.In such decompressor, if refrigerant flows through the gap, guiding skirt section and shell of valve port and spool
Gap, then sometimes in the refrigerant at the position after immediately refrigerant flows through the narrow gap generate cavitation erosion.If
Cavitation erosion is generated in refrigerant, then spool causes micro-vibration and contacts with shell, thus leads to the problem of abnormal sound.
The purpose of the present invention is to provide the throttling set for the generation for being able to suppress abnormal sound and refrigerating circulation systems.
Solution for solving the problem
Throttling set of the invention is that a kind of fluid to the high pressure from primary side carries out decompression and sends out to secondary side
Throttling set, which is characterized in that have: valve base part, with valve port, and be arranged to separate primary side space and two
The space of secondary side；Spool faces above-mentioned valve port by secondary side from than above-mentioned valve base part, and keeps the aperture of the valve port variable；
The guiding parts of tubular supplies above-mentioned spool interpolation, and the spool is guided to retreat relative to above-mentioned valve base part, in above-mentioned valve
Core and above-mentioned guiding parts, are respectively formed with via defined gap and sliding contact that is opposed and being capable of sliding contact each other
Face, above-mentioned gap becomes the flow path for making fluid circulate from above-mentioned valve port towards secondary side, in above-mentioned spool and above-mentioned guide part
The above-mentioned sliding contact surface of at least one party of part, the direction for forming the sliding contact surface of oriented separate another party are concave come on expanding
State the flow path expansion section of the width dimensions of flow path.
According to such present invention, flow path is formed by the sliding contact surface in spool and guiding parts sliding contact and is expanded
Portion forms sinuous flow to make to flow into the fluid behind the flow path expansion section, can obtain (advance and retreat side in the axial direction using the pressure of sinuous flow
To) central side (side far from guiding parts) centripetence for exerting a force to spool.Therefore, it is able to suppress the micro- of spool
Vibration, is allowed to be difficult to contact with guiding parts, so as to inhibit the generation of abnormal sound.
At this point, above-mentioned flow path expansion section preferably by the groove continuously in a circumferential of above-mentioned spool and above-mentioned guiding parts Lai
It constitutes, or circumferentially being constituted with the multiple recess portions formed at equal intervals by above-mentioned spool and above-mentioned guiding parts.
According to this structure, by forming groove continuously in a circumferential, or make multiple recess portions circumferentially with shape at equal intervals
At to constitute flow path expansion section, so as to keep the pressure of sinuous flow for each position circumferentially for acting on spool balanced, in turn
The gap of spool and guiding parts can be made uniform in the circumferential.
Also, it is preferred that being also equipped with spring members, which configures the Xiang Shangshu valve port side pair in above-mentioned guiding parts
Above-mentioned spool exerts a force, and makes above-mentioned bullet using the pressure difference of the fluid of the low pressure of the fluid and secondary side of the high pressure of primary side
Spring part distortion, and keep above-mentioned spool mobile, to be changed to the aperture of above-mentioned valve port.
According to this structure, in the throttling set for the differential pressure type for having the spring members to exert a force to valve port side to spool
In (differential pressure type expansion valve), the generation of abnormal sound can be inhibited as described above.Herein, the throttling set of differential pressure type does not have drive
Movable valve plug is allowed to the driving mechanism retreated, and makes spool passively by the balance of the active force of the pressure and spring members of fluid
It moves forward and backward, to have the tendency that spool easily causes micro-vibration.In the throttling set of such differential pressure type, also described above that
Sample obtains centripetence by the pressure using the formed sinuous flow in flow path expansion section, can inhibit the micro- of spool in a effective manner
Vibration.
Additionally, it is preferred that being also equipped with main body cover, which supplies above-mentioned valve base part and above-mentioned guiding parts interpolation,
And constituting has the secondary chamber that secondary side is leaned on than the valve base part by a secondary chamber of primary side and than the valve base part, in above-mentioned master
Between body case and above-mentioned guiding parts, it is formed with the main body effluent for making fluid circulate from above-mentioned valve port towards above-mentioned secondary chamber
Road.According to this structure, by having a main body cover for valve base part and guiding parts interpolation, and the main body cover with lead
To main body side flow path is formed between component, main body side flow path can be enabled flow through and flowed smoothly towards secondary chamber (secondary side)
It is logical.Therefore, it can not be influenced by sinuous flow caused by flow path expansion section, so as to ensure to want using main body side flow path to control
The flow of system.Also, it inserts in main body cover by interior and is protected, to even if acted on when being assembled into system from piping
Deng stress, can also prevent the deformation of valve base part, guiding parts, thus can further suppress the spool that moves forward and backward with
Abnormal sound caused by the contact of guiding parts.
At this time, it is preferable that the secondary side of above-mentioned guiding parts and above-mentioned valve base part is continuously integrally formed, and at this
The position for being adjacent to above-mentioned valve base part of guiding parts is formed with the connection of above-mentioned valve port and aforementioned body side fluid communication
Hole.According to this structure, since guiding parts and valve base part are integrally formed, so the guide part of the inside of main body cover can be made
The setting of part is in stable condition, and the spool so as to guide it internal is steadily retreated.In addition, due to being formed in guiding parts
Intercommunicating pore, so circulating from valve port towards main body side flow path while smooth fluid can be made.
Also, preferably, the end by secondary side of above-mentioned guiding parts is blocked by cover, and in the guiding parts
It is adjacent to the position of above-mentioned cover, being formed with will be connected to inside the guiding parts with the second of aforementioned body side fluid communication
Hole.According to this structure, it since the end by secondary side of guiding parts is blocked by cover, and is formed in institute's adjoining position
There is the second intercommunicating pore, so can suitably adjust according to the opening area of the second intercommunicating pore in guiding parts internal circulation
The flow of fluid.Therefore, by suitably to flowing through and the fluid of the flow path in the gap of spool, i.e. inflow inside guiding parts
Flow path expansion section is adjusted to form the flow of the fluid of sinuous flow, can realize above-mentioned centripetence in a effective manner.At this point,
Since the primary flow path of fluid is the main body side flow path outside guiding parts, so even if having adjusted the fluid inside guiding parts
Flow, will not hinder throttling set circulate fluid flowing, smooth fluid can be made towards secondary side circulate.
Refrigerating circulation system of the invention is characterized in that having: the compression compressed to the refrigerant as fluid
Machine；Make the condenser of the refrigerant condensation of compression；The above-mentioned throttling set for depressurizing the refrigerant expansion of condensation；And make to subtract
The evaporator of the refrigerant evaporation of pressure.
It is same as described above according to such refrigerating circulation system of the invention, it is able to suppress the abnormal sound in throttling set
It generates.
The effect of invention is as follows.
Throttling set and refrigerating circulation system according to the present invention, pass through the sliding contact surface in spool and guiding parts
Setting flow path expansion section, the centripetence that the pressure of sinuous flow can be formed by using the flow path expansion section to obtain spool, from
And it is able to suppress due to spool is contacted with guiding parts and generates abnormal sound, and then mute can be promoted.
Detailed description of the invention
Fig. 1 is the cross-sectional view for showing the throttling set of first embodiment of the invention.
Fig. 2 is the brief configuration figure for having the refrigerating cycle of above-mentioned throttling set.
Fig. 3 is the cross-sectional view for enlargedly showing the major part of above-mentioned throttling set.
Fig. 4 is the cross-sectional view for showing the variation of above-mentioned throttling set.
Fig. 5 is the cross-sectional view for showing other variations of above-mentioned throttling set.
Fig. 6 is the cross-sectional view for showing the throttling set of second embodiment of the present invention.
Specific embodiment
Next, the embodiments of the present invention will be described with reference to the drawings.Fig. 1 is the throttling for showing first embodiment
The cross-sectional view of device, (A) in the figure is longitudinal section view, and (B) is the line A-A cross-sectional view of (A).Fig. 3 is enlargedly to show throttling
The cross-sectional view of the major part of device, (B) in the figure are the portion the A enlarged drawings of (A).
The throttling set 10 of present embodiment is used for refrigerating cycle shown in Fig. 2.The refrigerating cycle have compressor 100,
Condenser 110, throttling set 10 and evaporator 120, the circulation of direction shown in arrow of the refrigerant in figure.Such as it is inciting somebody to action
In the case that the refrigerating cycle is constituted as air conditioner, supply to condenser 110 by the compressed refrigerant of compressor 100,
And it conveys to throttling set 10 by the condensed refrigerant of condenser 110.Throttling set 10 makes as being described below
Refrigerant expands and is allowed to decompression to convey to evaporator 120.Moreover, passing through the refrigeration after being evaporated by evaporator 120
Heat exchange is carried out between agent and indoor air to cool down to interior, to obtain the function of refrigeration.It is steamed by evaporator 120
Refrigerant after hair is compressed by compressor 100 again, and the circulation more than executing repeatedly.
As shown in (A) of Fig. 1, throttling set 10 has the main body cover 1 being made of metal tube, metal valve base part
2, guiding parts 3, the needle-valve 4 as spool, resistance elements 5, the helical spring 6 as spring members, cover 7 and limit
Position component 8.In addition, valve base part 2 and guiding parts 3 are formed as one by the cutting etc. of metal material.
Main body cover 1 is the cylindric shape centered on axis L, and composition connect primary with above-mentioned condenser 110
Room 11 and the secondary chamber 12 being connect with above-mentioned evaporator 120.
Valve base part 2 is matched generally cylindrical shaped with the inner surface of main body cover 1.In the outer peripheral surface of valve base part 2
Complete cycle (around the complete cycle of axis L) be formed with riveting slot 2a, by the position of riveting slot 2a rivet main body cover 1, come
Valve base part 2 (and guiding parts 3) is fixed in main body cover 1.Valve base part 2 is disposed in a secondary chamber 11 and two as a result,
Between secondary chamber 12.Also, it is formed with the valve port 21 in the cylindrical hole centered on axis L in valve base part 2, and primary at it
11 side of room is formed with valve base part 2 coaxially from valve port 21 to the canister portion 22 of 11 side opening of a secondary chamber.
Guiding parts 3 is cylindric shape and is arranged in secondary chamber 12 from the setting of valve base part 2, the guiding parts 3
Become main body side flow path 13 with the gap of main body cover 1.Guiding parts 3 has the columned pilot hole centered on axis L
31, also, be formed in the position adjacent with valve base part 2 and be connected to the inside of pilot hole 31 with outside (main body side flow path 13)
Multiple intercommunicating pores 32.Also, it is formed about 31 inside of pilot hole with outside in the end by 12 side of secondary chamber of guiding parts 3
Multiple second intercommunicating pores 33 of portion's (main body side flow path 13) connection, total opening area of these the second intercommunicating pores 33 are formed as comparing
Intercommunicating pore 32 is small.
Needle-valve 4 have make needle-like portion 41 coniform made of the end face general planar of front end 41a, be inserted through guiding
Insertion portion 42 in the pilot hole 31 of component 3 and be formed in insertion portion 42 secondary side end lug boss 43.Insertion portion 42
In generally cylindrical shape, by the way that the insertion portion 42 is inserted through pilot hole 31, come in a manner of being moved forward and backward along axis L pair
Needle-valve 4 is oriented to.Moreover, the backside space by needle-valve 4 of pilot hole 31 becomes intermediate pressure chamber 44.Needle-like portion 41 is inserted through
In valve port 21, thus moving forward and backward and changing the gap with valve port 21 with needle-valve 4 carries out variable control to valve opening.
As shown in figure 3, the outer peripheral surface of insertion portion 42 and the inner peripheral surface of pilot hole 31 are mutually opposed via defined gap,
The gap, which becomes, makes refrigerant from the intermediate flow passage (flow path) 45 that pressure chamber 44 circulates towards the middle of valve port 21.Moreover, inserting
The outer peripheral surface in portion 42 is formed with sliding contact surface 46, and is formed with sliding contact surface 34 in the inner peripheral surface of pilot hole 31, these cunnings
Dynamic 34,46 sliding contact each other of contact surface.Sliding contact surface 34,46 mutual gap size L1 are for example set as 0.1mm
Left and right to which needle-valve 4 can be directed to the guidance of component 3 without loosening hereinafter, retreat.
Resistance elements 5 are installed on the lug boss 43 of needle-valve 4, and are extended from insertion portion 42 to secondary side.The resistance part
Part 5 is formed by leaf spring etc., has multiple blade parts 51 for the inner peripheral surface sliding contact with pilot hole 31.Resistance elements 5 are logical
The inner peripheral surface sliding contact for making blade part 51 Yu pilot hole 31 is crossed, to move forward and backward imparting resistance to sliding to needle-valve 4.That is, if
The pressure of refrigerant is changed with the opening and closing of valve port 21, then has a possibility that generating the bounce that needle-valve 4 is fine opened and closed repeatedly,
But by assigning resistance to sliding to needle-valve 4 using resistance elements 5, to prevent from beating.
Helical spring 6 is disposed in needle-valve 4 and cover 7 via resistance elements 5 in pilot hole 31 with the state of compression
Between.Cover 7 is fixed on guiding parts 3 by riveting guiding parts 3 at the position of the riveting slot of its periphery.Spiral bullet
Spring 6 exerts a force to needle-valve 4 to 11 side of a secondary chamber, makes needle-valve 4 to the closing of the closure valve port 21 of needle-like portion 41 using the active force
Position side is mobile, and the pressing force caused by differential pressure of the secondary chamber 11 with secondary chamber 12 has been more than the active force of helical spring 6
In the case of, needle-valve 4 is mobile to the open position side (secondary side) that needle-like portion 41 opens valve port 21.
Limiting component 8 is generally cylindrical shape, riveting slot 8a is formed in its periphery, by the position of riveting slot 8a
The place of setting rivets the canister portion 22 of valve base part 2 to be fixed on valve base part 2.Also, as shown in (B) of Fig. 1, in the limiting component 8
It is formed with the notch 81 that section made of cutting away two positions of its outer peripheral surface is in D shape, refrigerant can pass through these
Notch 81 and from a secondary chamber 11 towards valve port 21 circulate.The front end 41a of the needle-like portion 41 of needle-valve 4 is connected to the limiting component
8, it is had the gap to be formed between the needle-like portion 41 and valve port 21.That is, the front end 41a of needle-valve 4 by limiting component 8 by
Positioning, so that needle-valve 4 is supported with the state for not being seated at valve base part 2.
According to above structure, if the high-pressure refrigerant for carrying out condenser 110 is flowed into a secondary chamber 11, such as Fig. 1, Fig. 3
Arrow shown in, the refrigerant of a secondary chamber 11 passes through the gap of valve port 21 and needle-like portion 41 from the notch 81 of limiting component 8
And it is flowed out into pilot hole 31.Refrigerant after flowing out the pilot hole 31 shunts, and the refrigerant of the flowing of side is from guiding parts 3
Intercommunicating pore 32 flowed to main body side flow path 13, the refrigerant of the flowing of the other side is by intermediate flow passage 45 to intermediate pressure chamber
44 flow into.The refrigerant of main body side flow path 13 flows into keeping intact to secondary chamber 12, but the refrigerant warp of intermediate pressure chamber 44
It is flowed out from the second intercommunicating pore 33 of guiding parts 3 to secondary chamber 12.After expansion is depressurized and flows into secondary chamber 12 like this
Refrigerant is conveyed to evaporator 120.
In above throttling set 10, in the sliding contact surface 46 of the insertion portion 42 of needle-valve 4 and the inner peripheral surface of guiding parts 3
Sliding contact surface 34 in sliding contact surface 46, continuously in a circumferential recessed being formed with centered on axis L as illustrated in fig. 3
Slot 47.The direction (towards the direction of axis L) of the groove 47 to the sliding contact surface 34 far from guiding parts 3 is concave and is formed,
Size L2 between the bottom and sliding contact surface 34 of groove 47 is formed as than sliding contact surface 34,46 mutual gap size L1
Greatly.Widened flow path expansion section is carried out to the width dimensions of intermediate flow passage 45 that is, constituting using groove 47.
Herein, as shown in (B) of Fig. 3, sliding contact surface 34,46 mutual gap size L1 be 0.1mm or so hereinafter, with
This is opposite, and depth dimensions (size until from sliding contact surface 46 to the bottom of groove 47) L3 of groove 47 is preferably 0.4mm
~1.5mm or so.It also, is preferably equal with its depth dimensions L3 or in its depth along the width dimensions L4 of the groove of axis L 47
Spend size L3 or more.Also, substantially 45 ° of angle of the continuous inclined-plane of slave sliding contact surface 46 of groove 47, bottom part
V-shaped groove as the curve form in arc-shaped.
Since such groove 47 as flow path expansion section is formed in the sliding contact surface 46 of needle-valve 4, so in centre
It is flowed into flow path 45 to the refrigerant that secondary side flows to groove 47, and forms sinuous flow as whirlpool in groove 47.It utilizes
The sinuous flow collides the pressure when inner surface of groove 47, the centripetal work that the central side to obtain to axis L exerts a force to needle-valve 4
With to maintain the sliding contact surface 34 of needle-valve 4 and pilot hole 31,46 mutual gap size L1.Also, due to being formed with
Groove 47, so the sliding contact surface 46 of insertion portion 42 is bisected as along the primary side and secondary side of axis L, respective sliding
Contact surface 46 is configured to 34 sliding contact of sliding contact surface with guiding parts 3.
In addition, the groove 47 as flow path expansion section is not limited to form shown in FIG. 1 to FIG. 3, it is also possible to Fig. 4
(A), (B), Fig. 5 (A), form shown in (B).In the throttling set 10 shown in Fig. 4 (A), in the insertion portion 42 of needle-valve 4, and
Along axis L primary side and secondary side be equipped with totally two grooves 47 in a row.In other words, the sliding contact surface of insertion portion 42
46 are configured to and are oriented to by the third primary side, middle part and secondary side being divided into along axis L, respective sliding contact surface 46
34 sliding contact of sliding contact surface of component 3.Therefore, by using two grooves 47 come in the primary side of insertion portion 42 and secondary
Two positions of side generate centripetence caused by sinuous flow, so as to prevent the inclination of needle-valve 4.
It is recessed equipped with being formed along axis L longer in the insertion portion 42 of needle-valve 4 in the throttling set 10 shown in Fig. 4 (B)
Slot 47.The width dimensions L4 of the groove 47 is set as left and right 5 times (5L3) of its depth dimensions L3.Therefore, sliding contact surface 46 is set
In the end of the insertion portion 42 separated along axis L to primary side and secondary side, respective sliding contact surface 46 is configured to and is oriented to
34 sliding contact of sliding contact surface of component 3.Groove 47 shown in Fig. 4 (B) becomes the approximate right angle from sliding contact surface 46
Concave square groove, due to making to generate change in flow sharply, institute by the refrigerant behind sliding contact surface 34,46 mutual gaps
To be easy to generate sinuous flow at the edge part of sliding contact surface 46 and groove 47.
In the throttling set 10 shown in Fig. 5 (A), it is formed with circumferentially in the insertion portion 42 of needle-valve 4 to be formed at equal intervals
Multiple recess portions 48, constitute flow path expansion section using these multiple recess portions 48.Multiple recess portions 48 are for example by centered on axis L
Six recess portions every 60 ° of ground settings are constituted, and each recess portion 48 is by making the sliding contact surface 46 half of insertion portion 42 using cutting etc.
It is spherically concave to be formed.The depth dimensions L3 of each recess portion 48 is identical as groove 47, preferably 0.4mm~1.5mm or so.And
And the size L4 of each recess portion 48 is preferably equal with its depth dimensions L3 or in its depth dimensions L3 or more.
In the throttling set 10 shown in Fig. 5 (B), the insertion portion 42 of needle-valve 4 is formed as cylindric, and outer peripheral surface is substantially
On the other hand the whole sliding contact surface 46 that becomes is formed in the sliding contact surface 3 of the inner peripheral surface of guiding parts 3 and circumferentially connects
Continuous groove 35.The groove 35 is formed by being made the sliding contact surface 34 of guiding parts 3 concave using cutting etc., recessed using this
Slot 35 constitutes flow path expansion section.The depth dimensions L3 of groove 35 is identical as groove 47, preferably 0.4mm~1.5mm or so.And
And the width dimensions L4 along axis L of groove 35 is preferably equal with its depth dimensions L3 or in its depth dimensions L3 or more.It should
Groove 35 becomes the concave square groove in approximate right angle ground from sliding contact surface 34, in the edge part of sliding contact surface 34 and groove 35
Place is easy to produce sinuous flow.
According to above present embodiment, when refrigerant is being formed between the pilot hole 31 of guiding parts 3 and needle-valve 4
When intermediate flow passage 45 circulates, which flows into groove 47 (or recess portion 48, groove 35) and forms sinuous flow, and the sinuous flow is to axis
The central side of L exerts a force to needle-valve 4, so as to inhibit the micro-vibration of needle-valve 4, is allowed to be difficult to contact with guiding parts 3, into
And it is able to suppress the generation of abnormal sound.
Also, due to groove 47 (either groove 35) being formed along needle-valve 4 (or guiding parts 3) circumferentially continuously, or
Person's recess portion 48 is along the circumferential to be formed at equal intervals of needle-valve 4, so can make the sinuous flow for each position circumferentially for acting on needle-valve 4
Pressure it is balanced, so as to keep needle-valve 4 and the gap size L1 of guiding parts 3 uniform in the circumferential.
Also, throttling set 10 has the main body cover 1 for 3 interpolation of valve base part 2 and guiding parts, due in the master
Main body side flow path 13 is formed between body case 1 and guiding parts 3, so refrigerant can be made to move smoothly through main body side flow path
13 and towards secondary chamber 12 circulate.Also, it inserts in main body cover 1 due to interior and is protected, and guiding parts 3 and valve base part
2 is integrally formed, so the deformation of valve base part 2, guiding parts 3 can be prevented, moves forward and backward so as to further suppress
Needle-valve 4 and abnormal sound caused by the contact of guiding parts 3.In addition, due to being formed with intercommunicating pore 32 in guiding parts 3, so energy
Refrigerant is enough set swimmingly to circulate from valve port 21 towards main body side flow path 13.
Also, it since the end by secondary side of guiding parts 3 is blocked by cover 7, and is formed in adjacent position
There is the second intercommunicating pore 33, so can suitably adjust inside guiding parts 3 according to the opening area of the second intercommunicating pore 33
The flow of the refrigerant of circulation.Therefore, by suitably in the intermediate flow passage 45 inside guiding parts 3, inflow groove 47
(or recess portion 48, groove 35) is adjusted to form the flow of the refrigerant of sinuous flow, can realize in a effective manner and act on needle
The centripetence of valve 4.At this point, since the primary flow path of refrigerant is main body side flow path 13, so even if having adjusted intermediate flow passage
The flow of 45 refrigerant will not hinder the flowing of the refrigerant to circulate in throttling set 10, can make refrigerant swimmingly
It circulates towards secondary side.
Next, being illustrated based on throttling set of the Fig. 6 to second embodiment of the present invention.The section of present embodiment
Device 10A is flowed main body cover 1 and guiding parts 3 is being omitted and is utilizing in refrigerating cycle compared with above-mentioned throttling set 10
Make the piping P of refrigerant circulation as guiding parts in terms of have relatively big difference.Hereinafter, to the difference with first embodiment
Be described in detail, sometimes to first embodiment is same or identical structure mark the same symbol and omits the description.
Throttling set 10A is set to the inside of piping P, has valve base part 2A, needle-valve 4A, resistance elements 5A, helical spring
6A, limiting component 8A and adjustment component 9.
Valve base part 2A be with piping P inner surface it is matched generally cylindrical shaped, formed on the complete cycle of its outer peripheral surface
There is riveting slot 2a, by riveting piping P at the position of riveting slot 2a, valve base part 2A is fixed in piping P.By
This, valve base part 2A, which will be piped inside P, is divided into primary side (condenser 110) and secondary side (evaporator 120).Also, in valve
Base member 2A is formed with the valve port 21 in cylindrical hole centered on axis L, and its primary side be formed with from valve port 21 to
The internal thread part 23 of side opening.
Needle-valve 4A is guided by its insertion portion 42 and the inner surface sliding contact of piping P, and is directed to along axis L
It moves forward and backward.The outer peripheral surface of insertion portion 42 with piping P inner peripheral surface mutually via defined gap it is opposed, the gap become make
The flow path 45A that refrigerant circulates from valve port 21 towards secondary side.Moreover, the outer peripheral surface in insertion portion 42 is formed with sliding contact surface
46, and it is formed with sliding contact surface P1 in the inner peripheral surface of piping P, these sliding contact surface 46, P1 sliding contacts each other.?
The sliding contact surface 46 of insertion portion 42 is formed with circumferentially continuous grooves 47 of two edges centered on axis L.These grooves 47
It is concave and formed to the direction of the sliding contact surface P1 far from piping P, the width dimensions of flow path 45A are constituted using groove 47
Carry out widened flow path expansion section.
Resistance elements 5A has multiple blade parts 51 with the inner surface sliding contact of piping P, moves to the advance and retreat of needle-valve 4A
It is dynamic to assign resistance to sliding, to prevent the bounce of needle-valve 4A.Helical spring 6A is in piping P via resistance elements 5A and with compression
State be disposed in needle-valve 4A and adjustment component 9 between.Adjustment component 9 has the adjustment component master for being integrally formed into external screw thread shape
It body 91 and is fixed by caulking to piping P and exchanges the fixation member 92 that integeral part main body 91 is screwed, in adjustment component master
Body 91 is formed through the via hole 93 for making refrigerant circulate to secondary side (evaporator 120).Adjustment article body 91 and
The end of its secondary side is formed with the slit being fitted into for flathead screwdriver, by the fixation relative to the adjustment article body 91
The screw-in amount of component 92 changes, and can adjust active force of the helical spring 6A relative to needle-valve 4A.
Limiting component 8A is integrally formed into external screw thread shape, the internal thread part engaged through the thread to be installed on valve base part 2A
23.It is formed through that so that refrigerant is circulated from primary side (condenser 110) towards valve port 21 not shown in limiting component 8A
Via hole.
Limiting component 8 positions it by abutting the front end of the needle-like portion 41 of needle-valve 4A, by opposite
It is changed in the screw-in amount of the internal thread part 23 of valve base part 2A, to adjust the needle-like portion 41 of needle-valve 4A and the seam of valve port 21
Gap, so as to adjust the flow (release flow) for the refrigerant for flowing through the gap.Carrying out limiting component 8A's like this
After the adjustment of position, limiting component 8A is for example fixed on valve base part 2A by bonding, solder brazing, riveting etc..
Throttling set 10A according to the present embodiment, when refrigerant the sliding contact surface 46 for being formed in needle-valve 4A with match
When flow path 45A circulation between the sliding contact surface P1 of pipe P, which flows into groove 47 and forms sinuous flow, and the sinuous flow is to axis
The central side of line L exerts a force to needle-valve 4A, so as to inhibit the micro-vibration of needle-valve 4A, is allowed to be difficult to contact with piping P, into
And it is able to suppress the generation of abnormal sound.In addition, by omitting main body cover 1 and guiding parts 3 in above-mentioned first embodiment,
And using piping P as guiding parts, number of components can be reduced and the construction of throttling set 10A can be simplified.
In addition, the present invention is not limited to above embodiment, the other structures including can be realized the purpose of the present invention
Deng, the present invention also include hereinafter shown in such deformation etc..For example, in the above-described embodiment, showing and utilizing primary side
Make the throttling set (differential pressure of the differential pressure type of mobile, so as to adjust valve port the aperture of spool with the differential pressure of the refrigerant of secondary side
Formula expansion valve) example, but throttling set of the invention is not limited to the throttling set of differential pressure type, it is possible to have driving valve
The driving mechanism (for example, motor-driven valve, solenoid valve etc.) of core.Also, in above embodiment, the example that spool is needle-valve is carried out
Explanation, but not limited to this, is also possible to ball valve, the apex angle biggish circular cone with the insertion portion for being inserted through guiding parts
The valve etc. of shape.Also, throttling set of the invention is not limited to utilize in the expansion valve of refrigerating cycle, also can with
It is utilized in the various piping systems for making the various fluid circulations such as gas, liquid.
Also, in above-mentioned first embodiment, valve base part 2 is fixed by caulking to main body cover 1, and the riveting of cover 7 is fixed
In guiding parts 3, and limiting component 8 is fixed by caulking to the canister portion 22 of valve base part 2, but these each components are not limited to rivet
It is fixed, it can use the fixing means appropriate such as welding, bonding, solder brazing also to fix.It is identical with this ground, it is real above-mentioned second
It applying in mode, valve base part 2A is fixed by caulking to piping P, and the fixation member 92 for adjusting component 9 is fixed by caulking to piping P, but
These each components can use the fixing means appropriate such as welding, bonding, solder brazing also to fix.
Also, in above embodiment, using the outer peripheral surface groove 47 continuously in a circumferential in spool or along spool
It circumferential multiple recess portions 48 to be formed at equal intervals or is formed in the inner peripheral surface groove 35 continuously in a circumferential of guiding parts
Flow path expansion section, but the flow path expansion section in the present invention is not limited to above-mentioned groove 35,47, recess portion 48.That is, flow path expansion section
It is formed in at least one party of spool and guiding parts, and to the concave width dimensions to expand flow path in direction far from another party
, can also formed circumferentially and axially inclinedly as helicla flute, reticulate pattern slot etc..It is not limited in spool and leads
Into component, either one, can also be formed in both sides.
Also, in above embodiment, recess portion 48 centered on axis L every 60 ° of ground by being set to the insertion portion of needle-valve 4
42 six recess portions are constituted, but the number of recess portion is not particularly limited.But recess portion is preferably circumferentially disposed at equal intervals.Separately
Outside, in above embodiment, each recess portion 48 makes the sliding contact surface 46 of insertion portion 42 is hemispherically concave to be formed, but recess portion
Shape is not limited to hemispherical, it is rectangular to be also possible to square, rectangle, other polygons etc., and be also possible to ellipse
Shape, oblong shape.At this point, be rectangle in recess portion, elliptical shape, oblong shape in the case where, preferred its longitudinal direction edge
The axial setting of spool.
Also, in above embodiment, as groove 35,47, the size of recess portion 48, its width dimensions L4 and depth are shown
It is equal or more than depth dimensions L3 or width dimensions L4 is 5 times or so of depth dimensions L3 (that is, L3≤L4 to spend size L3
≤ 5L3) example, it is preferably equal with depth dimensions L3 or in depth dimensions L3 but as groove, the width dimensions L4 of recess portion
It above and is twice or so following (that is, L3≤L4≤2L3).By setting the width dimensions L4 of groove, recess portion, energy like this
It enough is easy to produce sinuous flow, and can ensure the area of sliding contact surface and maintain durability.Also, the section as groove
Shape can be bottom part as embodiment described above and not have with the V-shaped groove of curved surface but it is also possible to be bottom part
The V-shaped groove of the acute angle of curved surface is easy to produce sinuous flow more increasing its inclined-plane and sliding contact surface angulation.Also, as
The cross sectional shape of groove, recess portion, compared with V-shaped groove more preferably with the biggish square groove of sliding contact surface angulation, thus
Change in flow sharply is generated with refrigerant is made at the edge part of sliding contact surface to be easy to produce sinuous flow.
More than, embodiments of the present invention are described in detail referring to attached drawing, but specific structure is not limited to
These embodiments, the present invention also include the design alteration etc. not departed from the range of purport of the invention.
The explanation of symbol
1-main body cover, 2,2A-valve base part, 3-guiding parts, 4,4A-needle-valve (spool), 6-helical springs
(spring members), 7-covers, 10,10A-throttling set, 11-one secondary chamber, 12-secondary chamber, 13-main body side flow paths,
21-valve ports, 32-intercommunicating pores, the 33-the second intercommunicating pore, 34-sliding contact surfaces, 35-grooves, 45-intermediate flow passages (stream
Road), 46-sliding contact surfaces, 47-grooves (flow path expansion section), 48-recess portions (flow path expansion section), 100-compressors,
110-condensers, 120-evaporators, P-piping (guiding parts), P1-sliding contact surface.
Claims (4)
1. a kind of throttling set carries out decompression to the fluid of the high pressure from primary side and sends out to secondary side, feature exists
In having:
Valve base part with valve port, and is arranged to separate the space of primary side and the space of secondary side；
Spool faces above-mentioned valve port by secondary side from than above-mentioned valve base part, and keeps the aperture of the valve port variable；And
The guiding parts of tubular supplies above-mentioned spool interpolation, and the spool is guided to retreat relative to above-mentioned valve base part,
In above-mentioned spool and above-mentioned guiding parts, it is respectively formed with via defined gap and opposed and can slide connect each other
The sliding contact surface of touching, above-mentioned gap become the flow path for making fluid circulate from above-mentioned valve port towards secondary side,
In above-mentioned spool and the above-mentioned sliding contact surface for being only limitted to either one of above-mentioned guiding parts, formed oriented far from another
The concave flow path expansion section to expand the width dimensions of above-mentioned flow path in direction of the sliding contact surface of side, connects in the sliding of another party
Contacting surface does not form above-mentioned flow path expansion section.
2. throttling set according to claim 1, which is characterized in that
Above-mentioned flow path expansion section is by only either one the groove continuously in a circumferential of above-mentioned spool and above-mentioned guiding parts come structure
At, or by above-mentioned spool and above-mentioned guiding parts only either one circumferentially with multiple recess portions for being formed at equal intervals come structure
At.
3. throttling set according to claim 1 or 2, which is characterized in that
Spring members are also equipped with, which configures in above-mentioned guiding parts, and Xiang Shangshu valve port side carries out above-mentioned spool
Force,
Deform above-mentioned spring members using the pressure difference of the fluid of the low pressure of the fluid and secondary side of the high pressure of primary side, and
And keep above-mentioned spool mobile, to be changed to the aperture of above-mentioned valve port.
4. a kind of refrigerating circulation system, which is characterized in that have:
The compressor that refrigerant as fluid is compressed；Make the condenser of the refrigerant condensation of compression；Make the system of condensation
Throttling set described in any one of claims 1 to 3 that cryogen expands to depressurize；And make the steaming of the refrigerant evaporation of decompression
Send out device.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-020204 | 2015-02-04 | ||
| JP2015020204A JP6325992B2 (en) | 2015-02-04 | 2015-02-04 | Throttle device and refrigeration cycle system |
| PCT/JP2016/050149 WO2016125512A1 (en) | 2015-02-04 | 2016-01-05 | Throttling device and refrigeration cycle system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107208819A CN107208819A (en) | 2017-09-26 |
| CN107208819B true CN107208819B (en) | 2019-09-27 |
Family
ID=56563864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680008244.1A Expired - Fee Related CN107208819B (en) | 2015-02-04 | 2016-01-05 | Throttling set and refrigerating circulation system |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6325992B2 (en) |
| CN (1) | CN107208819B (en) |
| WO (1) | WO2016125512A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6769808B2 (en) * | 2016-09-29 | 2020-10-14 | 株式会社ジェイテクト | Pressure reducing valve device |
| JP6872800B2 (en) * | 2018-01-29 | 2021-05-19 | 株式会社不二工機 | Control valve for variable displacement compressor |
| JP6757996B2 (en) * | 2019-04-23 | 2020-09-23 | 株式会社不二工機 | Solenoid valve |
| JP2023180783A (en) * | 2022-06-10 | 2023-12-21 | 愛三工業株式会社 | Pressure reduction valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201795125U (en) * | 2010-08-28 | 2011-04-13 | 宁波华平金属制品有限公司 | Dynamic flow balancing valve |
| CN203322420U (en) * | 2013-05-30 | 2013-12-04 | 干平 | Automatic draining valve |
| CN103442920A (en) * | 2011-03-16 | 2013-12-11 | 百乐仕株式会社 | Overfill prevention valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990671U (en) * | 1982-12-08 | 1984-06-19 | 松下精工株式会社 | High pressure pressure regulating valve |
| JPS6349066U (en) * | 1986-09-18 | 1988-04-02 | ||
| JP4041406B2 (en) * | 2003-01-14 | 2008-01-30 | 株式会社不二工機 | Differential pressure expansion valve |
-
2015
- 2015-02-04 JP JP2015020204A patent/JP6325992B2/en active Active
-
2016
- 2016-01-05 WO PCT/JP2016/050149 patent/WO2016125512A1/en active Application Filing
- 2016-01-05 CN CN201680008244.1A patent/CN107208819B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201795125U (en) * | 2010-08-28 | 2011-04-13 | 宁波华平金属制品有限公司 | Dynamic flow balancing valve |
| CN103442920A (en) * | 2011-03-16 | 2013-12-11 | 百乐仕株式会社 | Overfill prevention valve |
| CN203322420U (en) * | 2013-05-30 | 2013-12-04 | 干平 | Automatic draining valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6325992B2 (en) | 2018-05-16 |
| CN107208819A (en) | 2017-09-26 |
| JP2016142380A (en) | 2016-08-08 |
| WO2016125512A1 (en) | 2016-08-11 |
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Granted publication date: 20190927 Termination date: 20210105 |