CN105443841B - A kind of pilot-operated type control valve and multi-connected air conditioner - Google Patents
A kind of pilot-operated type control valve and multi-connected air conditioner Download PDFInfo
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- CN105443841B CN105443841B CN201410252212.9A CN201410252212A CN105443841B CN 105443841 B CN105443841 B CN 105443841B CN 201410252212 A CN201410252212 A CN 201410252212A CN 105443841 B CN105443841 B CN 105443841B
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- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 230000005389 magnetism Effects 0.000 claims abstract description 6
- 239000003507 refrigerant Substances 0.000 claims description 34
- 239000000696 magnetic material Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 abstract description 10
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 35
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000005520 electrodynamics Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Magnetically Actuated Valves (AREA)
Abstract
The present invention provides a kind of multi-connected air conditioner and its pilot-operated type control valve, can improve the reliability of main valve plug movement.The pilot-operated type control valve includes main valve and pilot valve, the main valve has primary valve and opens and closes the main valve plug of the primary valve, the pilot valve is connected with its needle with the main valve plug, the needle is equipped with the first permanent magnet, the main valve plug is equipped with the second permanent magnet, the magnetism of first permanent magnet and the second permanent magnet is on the contrary, so that first permanent magnet and the second permanent magnet are attracted and the main valve plug is driven to open the primary valve.When needle is opened, main valve plug can not only move upwards under the promotion of valve chamber internal pressure differences, it can also move up to move upwards with needle by the active force that two permanent magnets are mutually attracted, i.e. main valve plug is subject to the double action of pressure difference and magnetic attracting force, the standard-sized sheet of primary valve can be achieved, the minimum pressure difference needed for main valve plug action is reduced, improves use reliability.
Description
Technical field
The present invention relates to refrigeration technology field, more particularly to a kind of pilot-operated type control valve for being used to control refrigerant.
The invention further relates to a kind of multi-connected air conditioners controlled using above-mentioned pilot-operated type control valve refrigerant.
Background technology
In the multi-connected air conditioner for having more indoor units in an outdoor unit, generally use pilot-operated type control valve is connected to
Between outdoor unit and indoor unit, to control refrigerant.
It please refers to Fig.1, Fig. 1 is structural representation of the pilot-operated type control valve in a kind of specific embodiment in the prior art
Figure.
The patent of Patent No. CN101122343A discloses a kind of pilot-operated type control valve, using electrodynamic type pilot valve, with
Ensure that piston is slowly opened, reduce piston operation impact caused by product.The pilot-operated type control valve includes main valve 1 ' and electricity
Dynamic formula pilot valve 2 ', main valve 1 ' have valve seat member 11 ', and valve seat member 11 ' is equipped with the main valve seat 12 ' with circular conical surface, main valve
Offer on 13 ' valve seat member 11 ' of primary valve that sliding freely intercalation has main valve plug 14 ', the section of main valve plug 14 ' on seat 12 '
In the piston structure of convex shape, moved up and down by 2 ' control bound core 14 ' of electrodynamic type pilot valve, to close or open master
Valve port 13 '.
In general, the operting differential pressure of pilot-operated type control valve is smaller, for multi-connected air conditioner, it is sometimes desirable to pilot-operated type control
Valve processed can work normally under the low pressure such as 0.007MPa, be difficult only to be opened by the promotion of pressure under so small atmospheric pressure
Primary valve 13 '.Therefore, the patent of Patent No. CN101122343A increases spring between main valve plug 14 ' and main valve seat 12 '
15 ', spring 15 ' is compressed during main valve plug 14 ' moves down, to work as unlatching primary valve 13 ' is needed to move up main valve plug
When 14 ', spring 15 ' can generate enough elastic forces so that main valve plug 14 ' is pushed away main valve seat 12 ', so as to open primary valve
13’。
Need guarantee spring 15 ' that can be generated in the stroke of main valve plug 14 ' using above-mentioned technical proposal sufficiently large
Restoring force with promote main valve plug 14 ' move；Since the stroke of main valve plug 14 ' is larger, 3mm or so is can generally achieve, that is,
It says, can still generate sufficiently large elastic-restoring force when the decrement of spring 15 ' reduces 3mm, this requires springs 15 '
Initial deformation amount is sufficiently large, i.e., can fully compress spring 15 ' when main valve plug 14 ' is closed.
But when main valve plug 14 ' is closed, the compressive deformation of spring 15 ' can generate main valve plug 14 ' larger reaction
Power, and the reaction force is passed to the needle 21 ' of electrodynamic type pilot valve 2 ' so that needle 21 ' bears additional pressure；It is another
Aspect, main valve plug 14 ' need that the keying of primary valve 13 ' is repeated, then spring 15 ' will also bear compressive deformation repeatedly,
During Repeated Compression, spring 15 ' is easy to generate fatigue failure, and then reduces the reliability that main valve plug 14 ' opens and closes；Furthermore
It is influenced by the 15 ' accuracy of manufacture of spring, verticality of the spring 15 ' in compression process is more difficult to control, when the deformation side of spring 15 '
When on the no longer same straight line of the direction of motion with main valve plug 14 ', spring 15 ' can generate offset from perpendicular to main valve plug 14 '
Active force, cause 14 ' deflection of main valve plug, and then increase frictional resistance suffered in 14 ' motion process of main valve plug.
Therefore, how to look for another way, design a kind of pilot-operated type control valve, to improve the reliability of main valve plug movement, ensure
Main valve plug is normally-open, while avoids causing additional impact to needle, is that those skilled in the art need the technology solved at present
Problem.
The content of the invention
The object of the present invention is to provide a kind of pilot-operated type control valves, can improve the reliability of main valve plug movement, reduce master
Frictional resistance during valve core movement ensures that main valve plug is normally-open, while avoids that the needle of pilot valve is caused additionally to rush
It hits.
It is a further object of the present invention to provide a kind of multiple air conditioners using above-mentioned pilot-operated type control valve control refrigerant
Tune machine can be reliably achieved the regulation and control to refrigerant.
In order to solve the above technical problems, the present invention provides a kind of pilot-operated type control valve, including main valve and pilot valve, the master
Valve has primary valve and opens and closes the main valve plug of the primary valve, and the pilot valve is connected with its needle with the main valve plug, described
Needle is equipped with the first permanent magnet, and the main valve plug is equipped with the second permanent magnet, first permanent magnet and the second permanent magnet
Magnetism is on the contrary, so that first permanent magnet and the second permanent magnet are attracted and the main valve plug is driven to open the primary valve.
The pilot-operated type control valve of the present invention is equipped with the permanent magnet that can be mutually attracted, then in valve on needle and main valve plug
During needle open, main valve plug can not only move upwards under the promotion of valve chamber internal pressure differences, can also pass through two permanent magnet phases
The active force being mutually attracted is moved upwards with moving up for needle；That is, main valve plug is subject to pair of pressure difference and magnetic attracting force
Recast is used, and can effectively realize the standard-sized sheet of primary valve, is reduced the minimum pressure difference needed for main valve plug action, is improved pilot-operated type control valve
Use reliability.
Since needle and main valve plug are equipped with magnetic opposite permanent magnet, and the relative motion distance between needle and main valve plug
It is smaller, then reliable and stable the suction-combining force can be formed between two permanent magnets, so as to ensure main valve plug reliability service；The opposing party
Face, the positioning of permanent magnet is more convenient, is convenient for installing, and is easy to ensure its geometric tolerance, continues reliably to attract to provide
Power；Compared in the prior art spring being used to promote main valve plug, the present invention will not be generated using permanent magnet auxiliary pushing main valve plug
The problem of fatigue failure, will not generate tilting action power deviateing needle axially direction, also would not be because of tilting action power
And increase the frictional force of main valve plug movement, therefore the reliability of main valve plug action can be improved.
Preferably, the main valve plug is equipped with to connect the valve seat core of the needle, and second permanent magnet is arranged on
On the valve seat core.
It can be set on main valve plug dedicated for connecting the valve seat core of needle, and the second permanent magnet is arranged on valve seat core
On, then the relative motion distance of needle and valve seat core is shorter, and the first permanent magnet and the second permanent magnet is enabled to be maintained at certain
In small distance, to provide continual and steady magnetic attracting force in the motion process of entire main valve plug, main valve plug is realized
Reliability service.
Preferably, the second locating piece is fixed on the valve seat core, second locating piece is made of magnetic material, institute
The second permanent magnet is stated to be pulled on the bottom of second locating piece and position.
Preferably, the valve seat core is less than the tubular of lower outer diameter in top outer diameter, so as to the junction shape of its top and the bottom
Into step end face；Second locating piece is sleeved on the upper end of the valve seat core, the upper surface of second permanent magnet with it is described
Second locating piece is attracted, and lower face is abutted with the step end face.
Step end face on valve seat core can be set, the second permanent magnet is then arranged on the second locating piece and step end face
Between, to realize the positioning of the second permanent magnet, avoid its landing or movement and influence the stability of the suction-combining force.
Preferably, the valve seat core has the pilot valve mouth that is connected with the primary valve, and offered on its barrel with it is described
The through hole of the valve chamber connection of pilot control valve；The needle is embedded in the valve seat core, and can relatively described valve seat mandrel to shifting
It is dynamic, to connect or close the pilot valve mouth and through hole.
The pilot valve mouth connected with primary valve can be set on valve seat core, when needle opposite valve seat core is moved up pilot valve mouth
When being connected with through hole, the indoor refrigerant of valve can flow to primary valve by through hole and pilot valve mouth, and then be flowed to by primary valve
Outlet then can adjust the flow of refrigerant at primary valve by adjusting the aperture of needle, and then control refrigerant to main valve plug
Thrust, realize the keying of primary valve.
Preferably, second locating piece is made of soft magnetic materials, and the magnetic loss of soft magnetic materials is smaller, can effectively be contracted
Subtract the first the distance between permanent magnet and the second permanent magnet both improves the reliability being attracted.
Preferably, the axial distance between first permanent magnet and the second permanent magnet is 0.8~1.2mm.
Preferably, the first locating piece is fixed on the needle, first permanent magnet has what is passed through for the needle
Through hole, first permanent magnet and the needle clearance fit, first locating piece support described first with end face thereon
Permanent magnet.Due to the first permanent magnet and needle clearance fit, and the first locating piece only plays a supporting role to the first permanent magnet, then
When needle rotates, the first permanent magnet can not be rotated with needle, and the actuation with the second permanent magnet is influenced to avoid its rotation；Again
First permanent magnet using the above structure, need to only be sleeved on needle, the first locating piece is then fixedly installed on needle i.e. by person
Can, simple in structure without carrying out other working processes to the first locating piece, assembling is convenient.
Preferably, first locating piece uses the material that cannot be attracted and be capable of magnetic conduction by magnetic material to be made.
It, will not be to the second locating piece and second forever when the first locating piece by magnetic material attractive material using that cannot be made
Magnet generates the suction-combining force, even if needle drives the first locating piece to rotate, since the first permanent magnet is not rotated with needle, and first forever
Magnet exists only in the suction-combining force of the second locating piece and the second permanent magnet axial direction, therefore will not drive valve seat core during needle rotation
It rotates with it, to avoid valve seat core rotates and damages main valve plug；Simultaneously as the power source of pilot valve only needs valve needle to turn
It is dynamic, kinetic equation loss can be reduced.
The present invention also provides a kind of multi-connected air conditioners, are made including being connected between outdoor unit and indoor unit, for controlling
The pilot-operated type control valve of cold medium, the pilot-operated type control valve are pilot-operated type control valve described in any one of the above embodiments.
Since the multi-connected air conditioner of the present invention has pilot-operated type control valve described in any one of the above embodiments, therefore any of the above-described
Technique effect caused by the pilot-operated type control valve is suitable for the invention multi-connected air conditioner, and details are not described herein again.
Description of the drawings
Fig. 1 is structure diagram of the pilot-operated type control valve in a kind of specific embodiment in the prior art；
Fig. 2 is a kind of structure diagram of the pilot-operated type control valve provided by the present invention in specific embodiment.
In Fig. 1：
1 ' main valve, 11 ' valve seat members, 12 ' main valve seats, 13 ' primary valves, 14 ' main valve plugs, 15 ' springs, 2 ' electrodynamic type guides
Valve, 21 ' needles
In Fig. 2：
1 main valve, 11 primary valves, 12 main valve plugs, 121 pistons, 1211 balance holes, 122 core bore, 13 valve seat cores, 131 step ends
Face, 132 pilot valve mouths, 133 through holes, 14 valve seats, 2 pilot valves, 21 needles, 211 needle tips, 22 shells, 23 rotors, 24 screws, 3
One permanent magnet, 4 second permanent magnets, 5 second locating pieces, 6 first locating pieces, 7 valve chambers, 8 entrance sleeves, 9 discharge connections, 10 transition
Part
Specific embodiment
The core of the present invention is to provide a kind of pilot-operated type control valve, can improve the reliability of main valve plug movement, reduces master
Frictional resistance during valve core movement ensures that main valve plug is normally-open, while avoids that the needle of pilot valve is caused additionally to rush
It hits.
Another core of the present invention is to provide a kind of multiple air conditioner using above-mentioned pilot-operated type control valve control refrigerant
Tune machine can be reliably achieved the regulation and control to refrigerant.
In order to which those skilled in the art is made to more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
It please refers to Fig.2, Fig. 2 is a kind of structural representation of the pilot-operated type control valve provided by the present invention in specific embodiment
Figure.
The pilot-operated type control valve of the present invention, for multi-connected air conditioner, is connected between outdoor unit and indoor unit, for controlling
The flow direction and flow of refrigerant processed.
The pilot-operated type control valve of the present invention includes main valve 1 and pilot valve 2, and pilot valve 2 is used for control bound 1, and main valve 1 has
Primary valve 11 and main valve plug 12, primary valve 11 are used to implement the flowing of refrigerant, and main valve plug 12 is used to open and close primary valve 11, main valve
Core 12 is usually arranged as piston-type structure；Pilot valve 2 has needle 21, and needle 21 is connected with main valve plug 12, to pass through needle 21
Motion control main valve plug 12 move so that main valve plug 12 open and close primary valve 11.
The pilot-operated type control valve of the present invention further includes the first permanent magnet 3 and the second permanent magnet 4, and the two is magnetic opposite；First
Permanent magnet 3 is arranged on needle 21, and the second permanent magnet 4 is arranged on main valve plug 12, then the first permanent magnet 3 and the second permanent magnet 4
It is mutually attracted, when needle 21 moves up main valve plug 12 can be driven to move up, so that main valve plug 12 opens primary valve 11, that is, open
Open primary valve 11.
As it can be seen that the present invention on needle 21 and main valve plug 12 by setting magnetic opposite permanent magnet so that between the two
The suction-combining force is generated, realizes reliable control of the needle 21 to main valve plug 12；When needle 21 moves upwards so that refrigerant is in pressure difference
Under the action of flow, main valve plug 12 to be promoted to move up, at the same needle 21 can with the aid of permanent magnet drive main valve plug 12 move up, then lead
Spool 12 is under pressure the double action with magnetic attracting force, so that it can completely disengage primary valve 11, realizes primary valve 11
Standard-sized sheet so that refrigerant quickly flows under the heavy caliber of primary valve 11.
Compared in the prior art spring being used to promote main valve plug 12, the present invention drives main valve plug 12 to transport using permanent magnet
It is dynamic, on the one hand, the performance of permanent magnet is higher, the problems such as being not in fatigue failure；On the other hand, needle 21 and main valve plug
It is mutually attracted by permanent magnet between 12, with compressing spring by needle in the prior art so that spring generates enough screen resiliences
Main valve plug action is promoted to compare, the assembling of permanent magnet is relatively simple, relatively low to assembly precision requirement, is easily guaranteed that the shape of its installation
Position tolerance, so as to provide reliable and stable attraction for main valve plug；Compared with the restoring force of spring in the prior art, permanent magnet institute
The direction for generating attraction is relatively easy to control, so that it is acted on the axis of needle and main valve plug, will not generate offset, also just not
The frictional force of main valve plug action can be increased due to offset；Spring of the prior art is arranged between main valve plug and main valve seat, by
It is longer in the movement travel of main valve, therefore the amplitude of variation of spring deformation amount is larger, the stability of generated elastic-restoring force compared with
Difference, and the permanent magnet of the present invention is arranged between needle and main valve plug, the stroke of the two relative motion is shorter, therefore the suction of permanent magnet
It is more stable with joint efforts, to ensure the reliability service of main valve plug.
Described herein is upper and lower using pilot-operated type control valve normal operating condition as reference, and main valve 1 is arranged on pilot valve 2
Lower section, primary valve 11 are opened in the lower section of main valve 1, and main valve plug 12 is blocked or opened primary valve 11, needle 21 with its lower face
It is connected to the top of main valve plug 12；Using the extending direction of main valve plug 12 and needle 21 to be axial, main valve plug during due to normal use
12 and needle 21 extend in vertical direction, therefore the vertical direction is the axial direction of the pilot-operated type control valve.
Further, valve seat core 13 can be set on main valve plug 12, and valve seat core 13 is for connecting needle 21, then by second forever
Magnet 4 is arranged on valve seat core 13, and valve seat core 13 cooperates with needle 21, so that needle 21 passes through 13 control bound of valve seat core
Core 12 acts.When setting valve seat core 13, can by the second permanent magnet 4 be arranged on valve seat core 13, on the one hand can provide
The reliability of positioning of second permanent magnet 4, facilitates its assembling；On the other hand, main valve plug 13 and the distance of needle 21 are relatively small, and two
The relative motion of person can be controlled in relatively short stroke, then the axial distance of the first permanent magnet 3 and the second permanent magnet 4 be maintained at compared with
A small range so that the two can be effectively attracted, ensures that magnetic attracting force is reliable and stable, so as to ensure the reliable of main valve plug 12
Operation.
Further, the second locating piece 5 can be fixedly connected on valve seat core 13, the second locating piece 5 uses magnetic material system
Into, so that the second permanent magnet 4 is pulled on the bottom of the second locating piece 5, then the second permanent magnet 4 by the second locating piece 5 realize with
Valve seat core 13 is located by connecting.
The second locating piece 5 is fixedly connected on valve seat core 13 first, the second permanent magnet is then attracted by the second locating piece 5
4 are located, and the structure of 13 and second permanent magnet 4 of valve seat core will not be produced bigger effect, will not especially damage the second permanent magnetism
Body 4 can ensure the stability of its structure, be conducive to improve the attraction between the second permanent magnet 4 and the first permanent magnet 3；Together
When, above-mentioned connection mode only needs the second locating piece 5 being fixed on valve seat core 13, easy to connect, easy to process.
To further improve the reliability of positioning of the second locating piece 5, step end face 131 can also be set on valve seat core 13,
Then the second locating piece 5 is mounted between the second locating piece 5 and step end face 131.As shown in Fig. 2, valve seat core 13 can be set
Tubular is set to, the outer diameter of its upper part can be less than the outside of lower part, then be formed with step end face 131 in the junction of top and the bottom；
Second locating piece 5 is sleeved on the upper end of valve seat core 13, then forms one between the lower face of the second locating piece 5 and step end face 131
A installation space, so that the second permanent magnet 4 is mounted in the installation space；After completing installation, the second permanent magnet 4 is with the upper end
Face and the lower face of the second locating piece 5 are attracted and position, and lower face is abutted with step end face 131, is supported by step end face 131
Top is fixed.
Pass through the structure setting of above-mentioned valve seat core 13 so that the second permanent magnet 4 is fixedly mounted on valve seat core 13, especially
Be its axial direction can reliable location, first, the top of the second permanent magnet 4 is positioned by the second locating piece 5, even if the first permanent magnet
3 generate larger the suction-combining force, the second permanent magnet 4 will not be driven to depart from valve seat core 13 and main valve plug 12, so as to the first permanent magnet 3
Pulling to main valve plug 12 is realized by the second permanent magnet 4, ensures the validity of driving；Secondly, the lower end of the second permanent magnet 4 leads to
It crosses step end face 131 and supports fixation, even if the magnetism of the second locating piece 5 is weaker, the second permanent magnet 4 will not fall, and ensure the
Two permanent magnets 4 in the position that can be sensed by the first permanent magnet 3, drive main valve plug 12 dynamic will pass through the actuation of the two always
Make.
Further, the second locating piece 5 can be annular locating tab, and valve can also be connected to by the way of being welded and fixed
It is simple in structure on seat core 13, it is easy to assembly；Or second locating piece 5 could be provided as arbitrary shape, as long as actuation can be played
And the effect of the second permanent magnet 4 is kept out, concrete form is unlimited；Second locating piece 5 is fixedly connected with mode with valve seat core 13
It is various, it is also not necessarily limited to weld, can also be integrally formed or be fixedly connected with mode using other.
Further, the soft magnetic materials that the second locating piece 5 may be employed in magnetic material is made, such as martensitic stain less steel
Deng improving its magnetic conductivity and magnetic induction intensity, reduce magnetic loss, to reduce the magnetic loss of the second permanent magnet 4 so that its have compared with
High the suction-combining force ensures that the first permanent magnet 3 is reliably attracted with the second permanent magnet 4.
Axial distance between first permanent magnet 3 and the second permanent magnet 4 can also be set, to ensure that the two can reliably inhale
It closes.Experiment proves that the axial distance between the first permanent magnet 3 and the second permanent magnet 4 can be arranged on 0.8~1.2mm, is preferably
1mm or so can not only ensure that the two is effectively attracted, not interfere with the normal use of needle 21 also at this time.
It is contemplated that main valve plug 12 can not also set valve seat core 13, and the second permanent magnet 4 is directly arranged on main valve plug
On 12, the top of the one side that main valve plug 12 is connected with needle 21, i.e. main valve plug 12 can be arranged on, as long as it can ensure that it is with
One permanent magnet 3 is attracted, without specially setting valve seat core 13；It can also set in the top of main valve plug 12 and coordinate with needle 21
Connecting hole position, to realize control of the needle 21 to main valve plug 12.
It is further envisioned that the mode that the second permanent magnet 4 is fixed on valve seat core 13 is various, magnetic material is not limited by
Manufactured second locating piece 5 carries out actuation positioning, for example, it is also possible to using key connection or the side of being fixedly connected such as be bolted
Formula, so that the second permanent magnet 4 is fixed on valve seat core 13.
In addition, valve seat core 13 can set pilot valve mouth 132, pilot valve mouth 132 is connected with primary valve 11, and the head of needle 21 is embedding
Be inserted into valve seat core 13, and with its needle tip 211 closure pilot valve mouth 132, needle 21 can opposite valve seat core 13 move axially, with
Just opening and closing of fault pilot valve mouth 132；Through hole 133, pilot-operated type control valve of the invention can also be opened up on the barrel of valve seat core 13
With valve chamber 7, the inlet communication of valve chamber 7 and refrigerant, due to 21 inserted valve seat core 13 of needle, and can be axial along valve seat core 13
It is mobile, then with the movement of needle 21, through hole 133 can be closed or open, so as to fulfill pilot valve mouth 132 and through hole 133
Connection and closing, so that refrigerant is followed by valve chamber 7, through hole 133 and pilot valve mouth 132, finally flow out via primary valve 11 or
Person cuts off the circulation of refrigerant.
Specifically, when 21 opposite valve seat core of needle 13 is axial to be moved down, the needle tip 211 of needle 21 is by 132 envelope of pilot valve mouth
Stifled, the outer wall of needle 21 is bonded with the inner wall of valve seat core 13 at this time, and the through hole 133 on 13 barrel of valve seat core is blocked,
Through hole 133 and pilot valve mouth 132 are in closure state at this time, and the circulation passage of refrigerant is cut off；When 21 opposite valve seat of needle
When core 13 axially moves up, needle tip 211 departs from sealing state with pilot valve mouth 132, and pilot valve mouth 132 is opened, meanwhile, needle 21 is gradual
Valve seat core 13 is pulled out, the through hole 133 on the barrel in valve seat core 13 is also released, then through hole 133 connects with pilot valve mouth 132
Logical, refrigerant enters primary valve 11 followed by valve chamber 7, through hole 133 and pilot valve mouth 132, so as to outwards defeated by primary valve 11
Go out.
The needle tip 211 of the needle 21 refer in needle 21 head end be in tip-like structure, due to needle 21 with
Its head end is tightly connected with valve seat core 13, and valve seat core 13 is in the lower section of needle 21, therefore the head end of needle 21 i.e. its lower end, pin
Tip 211 is the end in tip-like that can be sealed with the pilot valve mouth 132 of valve seat core 13.
Further, since needle 21 move up distance it is shorter, i.e. the distance of the lower end pull valve seat core 13 of needle 21 is shorter, is
Ensure through hole 133 can be fully opened when needle 21 moves up, through hole 133 can be arranged on to the lower section of valve seat core 13, i.e., it is logical
Hole 133 is next on the barrel of pilot valve mouth 132, and after being moved up so as to needle 21, through hole 133 and pilot valve mouth 132 are opened, and
The two can connect.
In the pilot-operated type control valve of the present invention, main valve 1 can have valve seat 14, and input refrigerant is connected on valve seat 14
Entrance sleeve 8 and the discharge connection 9 for outwards conveying refrigerant, discharge connection 9 are connected with primary valve 11；Main valve plug 12 is set with
In valve seat 14, the upper end is the piston 121 sealed with valve seat 14, and lower end is tightly connected with primary valve 11；Main valve plug 12 may be used also
And have axially through core bore 122, core bore 122 connects with primary valve 11；Valve seat core 13 can specifically be arranged on piston 121
Top, and its pilot valve mouth 132 is connected with the core bore 122 of main valve plug 12, is connected with will pass through core bore 122 with primary valve 11.
Pilot valve 2 could be provided as electrodynamic type pilot valve, can include shell 22 and the rotor 23 being sleeved in shell 22,
Rotor 23 can be connected with screw 24, needle 21 and 24 floating connection of screw.The floating connection belongs to a kind of flexible connection side
Formula, needle 21 can be constrained mutually with screw 24, will not be separated from each other, while have certain relative displacement space again, can be
It is axially relatively moved in a certain range.
Pilot valve 2 is mounted on the top of main valve 1, has transition piece 10 between usual valve seat 14 and shell 22, passes through transition
Part 10 realizes sealing socket, as shown in Figure 2.After pilot valve 2 is connected with main valve 1, the upper surface of piston 121, valve seat 14, transition piece
10 and shell 1 be enclosed first chamber A jointly, lower face and the valve seat 14 of piston 121 are enclosed second chamber jointly
B, meanwhile, balance hole 1211 can also be set on piston 121, to connect the first chamber A and second chamber B, described first
Chamber A and second chamber B collectively forms the valve chamber 7 of pilot control valve of the present invention.
In detail, the specific work process of pilot-operated type control valve of the invention is as follows：
When pilot control valve is opened, the pilot valve 2 on top is opened as guide, is lifted on needle 21, needle tip 211 departs from
With the sealing surface of pilot valve mouth 132, then through hole 133 and pilot valve mouth 132 open, by through hole 133, pilot valve mouth 132, core bore 122 and main
The passage that valve port 11 is formed is opened；Refrigerant enters second chamber B from entrance sleeve 8, enters the first chamber by balance hole 1211
Room A then flows sequentially through through hole 133, pilot valve mouth 132, core bore 122 and primary valve 11 and enters discharge connection 9.
With the flowing of refrigerant, the refrigerant pressure in first chamber A is gradually reduced, since refrigerant is connect by import
Pipe 8 is constantly into second chamber B, therefore the pressure in second chamber B is more than first chamber A, and first chamber A is in the second chamber in addition
The top of room B, under the promotion of refrigerant pressure, main valve plug 12 moves up；At the same time, the first permanent magnet 3 on needle 21 with
Second permanent magnet 4 of the main valve plug 12 in other words on valve seat core 13 is mutually attracted, and with moving up for needle 21, passes through the first permanent magnet
3 pass to 12 1 upward attractions of main valve plug, that is to say, that the pressure of refrigerant and the attraction of permanent magnet pull jointly
Main valve plug 12 is moved up and moved up with needle 21.
With moving up for main valve plug 12, lower end and the primary valve 11 of main valve plug 12 are separated, and primary valve 11 is opened therewith, system
Cryogen can flow directly into discharge connection 9 by entrance sleeve 8 into the heavy caliber runner of primary valve 11；With primary valve 11
Aperture constantly increase, the pressure in second chamber B reduces rapidly, until second chamber B and the pressure difference of first chamber A are reduced to
Zero, at this time main valve plug 12 the suction-combining force of the first permanent magnet 3 and the second permanent magnet 4 effect under remains stationary, i.e. the first permanent magnet 3
To be enough the gravity for overcoming main valve plug 12 with the suction-combining force of the second permanent magnet 4 so that main valve plug 12 does not fall.
When complete refrigerant conveying need close pilot-operated type control valve when, valve needle 21 moves down, then main valve plug 12 with
Move down, primary valve 11 is begun to shut off, and the pressure in second chamber B increases rapidly, and the pressure of second chamber B is more than first chamber
A, but due to the effect of balance hole 1211, also slowly increase, the pressure difference of two chambers gradually subtract the pressure of first chamber A therewith
It is small；When main valve plug 12 moves to certain position, the dead weight of the pressure difference and main valve plug 12 of two chambers is cancelled out each other, main valve plug 12
In suspended state；Needle 21 continues to move down, and needle tip 211 is constantly close to the sealing surface of pilot valve mouth 132, by through hole 133, pilot valve
The runner that mouth 132 and core bore 122 form tapers into, and after pilot valve mouth 132 is closed completely, first chamber A is equivalent to one only
There is an airtight chamber of import (i.e. balance hole 1211), the pressure in first chamber A sharply increases, i.e. the pressure of first chamber A is big
In second chamber B, a downward pressure difference is generated between two chambers, the main valve plug 12 in suspended state to be driven to continue
It moves down, so as to close primary valve 11.
As it can be seen that the pilot-operated type control valve of the present invention is realized by the smaller pilot valve mouth 132 of bore to bigbore main valve
The control of mouth 11, and its is simple in structure, reliability is high.
More specifically, balance hole 1211 can be set on piston 121, and refrigerant can pass through balance hole stream from second chamber B
Enter first chamber A, the pilot valve mouth 132 connected with primary valve 11 can be set on valve seat core 13, when 21 opposite valve seat core 13 of needle
It moves up when pilot valve mouth 132 is connected with through hole 133, the refrigerant in second chamber B can pass through through hole 133 and pilot valve mouth
132 flow to primary valve 11, and then flow to discharge connection 9 by primary valve 11, at this time piston 121 by upward difference force effect and
It moves up, primary valve 11 is opened.When piston 121 is moved upwards up to a certain distance, through hole 133 and the circulation energy of pilot valve mouth 132
Power weakens, and the pressure increase of first chamber A, 121 stress of piston is gradually in balance, and vice versa.That is, work as pilot valve
2 needle 21 moves up or down, and piston 121 can also move up or down, and when needle 21 stops mobile, piston
121 can also be parked in a certain position.Therefore, the flow of refrigerant at primary valve 11 can be adjusted by adjusting the aperture of needle 21,
And then thrust of the refrigerant to main valve plug 12 is controlled, realize the keying of primary valve 11.
It should be noted that electrodynamic type driving may be employed in the pilot valve 2 of the present invention, i.e., using stepper motor as power
Source to realize step-less adjustment, can adjust the aperture size of pilot valve mouth 132 and primary valve 11, convenient for improving control accuracy, improve
Property easy to use；It is appreciated that pilot valve 2 can also use other type of drive such as electromagnetic type driving, as long as master can be realized
The keying of valve port 11.
On the basis of the above, the first locating piece 6 can also be fixedly connected on needle 21, then will be set on the first permanent magnet 3
Put the through hole passed through for needle 21, then the first permanent magnet 3 is sleeved on the outside of needle 21 with its through hole, and between needle 21
Gap coordinate, the first locating piece 6 with end face thereon support the first permanent magnet 3, i.e. 3 movable set of the first permanent magnet on needle 21,
And pass through the first locating piece 6 and be supported positioning.
When setting the first locating piece 6, the first permanent magnet 3 can be placed on the first locating piece 6, then in the work of gravity
Under, the first permanent magnet 3 is supported by the first locating piece 6 and positioned, and then first permanent magnet 3 is constrained by needle 21,
Avoid its offset；Above-mentioned positioning method is relatively simple, it is only necessary to realize being fixedly connected for the first locating piece 6 and needle 21, nothing
First permanent magnet 3 need to be reprocessed, reduce cost, improve efficiency of assembling.Meanwhile above-mentioned connection mode is not to
One permanent magnet 3 and needle 21 cause to damage, and with holding structure integrality, ensure that the first permanent magnet 3 and the second permanent magnet 4 are normally inhaled
It closes.
First locating piece 6 can also use welding etc. be fixedly connected with mode and be fixed on needle 21, can also use and the
The equivalent connection mode of two locating pieces 5 realizes the fixation with needle 21, refer to above, details are not described herein again.
It cannot be made in addition, the first locating piece 6 may be employed by the material that magnetic material attracts, which can lead simultaneously
Magnetic, so that the first permanent magnet 3 can be attracted with the second permanent magnet 4；It cannot be attracted since the first locating piece 6 uses by magnetic material
Material be made, then the second permanent magnet 4 and the second locating piece 5 will not generate attraction to the first locating piece 6, when needle 21 rotates
When, the first locating piece 6 is driven to rotate, but due to the first permanent magnet 3 and 21 clearance fit of needle, then the first permanent magnet 3 will not
It is rotated with needle 21；Again since the first permanent magnet 3 exists only in axial direction to the attraction of the second permanent magnet 4 and the second locating piece 5,
Therefore even if needle 21 rotates, valve seat core 13 will not be driven to rotate, avoid influencing main valve plug 12 due to valve seat core 13 rotates just
Often operation.
First permanent magnet 3 and the second permanent magnet 4 herein could be provided as circular ring type, and neodymium iron boron may be employed
It is sintered or is formed using ferrite sintered, so that it has higher magnetism, is specifically referred to of the prior art
Permanent magnet is configured.
It is special to be not offered as certain to first, second grade sequencers described herein only for distinguishing the component of different structure
Fixed order.
The present invention also provides a kind of multi-connected air conditioners, are connected between outdoor unit and indoor unit described in any of the above-described
Pilot-operated type control valve, to control refrigerant, the structure of other parts refer to existing in multi-connected air conditioner
Technology, details are not described herein again.
Multi-connected air conditioner provided by the present invention and its pilot-operated type control valve are described in detail above.Herein
It applies specific case to be set forth the principle of the present invention and embodiment, the explanation of above example is only intended to help
Understand the core concept of the present invention.It should be pointed out that for those skilled in the art, the present invention is not being departed from
On the premise of principle, can also to the present invention some improvement and modification can also be carried out, these improvement and modification also fall into right of the present invention
It is required that protection domain in.
Claims (10)
1. a kind of pilot-operated type control valve, including main valve (1) and pilot valve (2), the main valve (1) has primary valve (11) and opens and closes
The main valve plug (12) of the primary valve (11), the pilot valve (2) are connected with its needle (21) with the main valve plug (12), special
Sign is that the needle (21) is equipped with the first permanent magnet (3), and the main valve plug (12) is equipped with the second permanent magnet (4), described
The magnetism of first permanent magnet (3) and the second permanent magnet (4) is on the contrary, so that first permanent magnet (3) and the second permanent magnet (4) are inhaled
It closes and drives the main valve plug (12) moving up and move upwards with the needle (21), open the primary valve (11).
2. pilot-operated type control valve as described in claim 1, which is characterized in that the main valve plug (12) is equipped with for connecting
The valve seat core (13) of needle (21) is stated, second permanent magnet (4) is arranged on the valve seat core (13).
3. pilot-operated type control valve as claimed in claim 2, which is characterized in that be fixed with the second positioning on the valve seat core (13)
Part (5), second locating piece (5) are made of magnetic material, and second permanent magnet (4) is pulled on second locating piece
(5) bottom and position.
4. pilot-operated type control valve as claimed in claim 3, which is characterized in that under the valve seat core (13) is less than in top outer diameter
The tubular of portion's outer diameter forms step end face (131) so as to the junction of its top and the bottom；Second locating piece (5) is sleeved on institute
State the upper end of valve seat core (13), the upper surface of second permanent magnet (4) is attracted with second locating piece (5), lower face with
The step end face (131) abuts.
5. pilot-operated type control valve as claimed in claim 4, which is characterized in that the valve seat core (13) has and the primary valve
(11) the pilot valve mouth (132) of connection, and the through hole connected with the valve chamber of the pilot-operated type control valve (7) is offered on its barrel
(133)；The embedded valve seat core (13) of the needle (21), and can relatively described valve seat core (13) axial movement, with connection
Or close the pilot valve mouth (132) and through hole (133).
6. pilot-operated type control valve as claimed in claim 3, which is characterized in that second locating piece (5) uses soft magnetic materials
It is made.
7. pilot-operated type control valve as described in claim 1, which is characterized in that first permanent magnet (3) and the second permanent magnet
(4) axial distance between is 0.8~1.2mm.
8. such as claim 1-7 any one of them pilot-operated type control valves, which is characterized in that be fixed with the on the needle (21)
Positioning piece (6), first permanent magnet (3) have the through hole passed through for the needle (21), first permanent magnet (3)
With the needle (21) clearance fit, first locating piece (6) supports first permanent magnet (3) with end face thereon.
9. pilot-operated type control valve as claimed in claim 8, which is characterized in that first locating piece (6) uses cannot be by magnetic
Property material attract and be capable of the material of magnetic conduction to be made.
10. a kind of multi-connected air conditioner, the pilot-operated type including being connected between outdoor unit and indoor unit, for controlling refrigerant
Control valve, which is characterized in that the pilot-operated type control valve is the claims 1-9 any one of them pilot-operated type control valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410252212.9A CN105443841B (en) | 2014-06-09 | 2014-06-09 | A kind of pilot-operated type control valve and multi-connected air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410252212.9A CN105443841B (en) | 2014-06-09 | 2014-06-09 | A kind of pilot-operated type control valve and multi-connected air conditioner |
Publications (2)
| Publication Number | Publication Date |
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| CN105443841A CN105443841A (en) | 2016-03-30 |
| CN105443841B true CN105443841B (en) | 2018-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410252212.9A Active CN105443841B (en) | 2014-06-09 | 2014-06-09 | A kind of pilot-operated type control valve and multi-connected air conditioner |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107701210B (en) * | 2017-10-24 | 2019-09-03 | 北京天地玛珂电液控制系统有限公司 | A hydraulic control check valve control mechanism based on permanent magnet drive |
| CN109931409B (en) * | 2017-12-18 | 2021-11-30 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| DE102018208857A1 (en) * | 2018-06-06 | 2019-12-12 | Robert Bosch Gmbh | Injector for gaseous and liquid fuels |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122343A (en) * | 2006-08-07 | 2008-02-13 | 株式会社不二工机 | Pilot type control valve |
| CN103292009A (en) * | 2013-05-22 | 2013-09-11 | 吴章杰 | Magnetic driving device and valve body structure based on same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08135839A (en) * | 1994-11-10 | 1996-05-31 | Konan Denki Kk | Pilot type double acting solenoid valve |
| FR2727736B1 (en) * | 1994-12-02 | 1997-01-24 | Eaton Sa Monaco | VALVE CONTROLLED BY A FLUID |
| US6073904A (en) * | 1997-10-02 | 2000-06-13 | Diller; Ronald G. | Latching coil valve |
| CN2358313Y (en) * | 1999-02-12 | 2000-01-12 | 赵军 | Adjustable guiding safety valve |
| CN2619098Y (en) * | 2003-05-12 | 2004-06-02 | 浙江三花股份有限公司 | Two-way flow pilot type electromagnetic valve |
| JP4612377B2 (en) * | 2004-09-17 | 2011-01-12 | 株式会社不二工機 | Motorized valve |
| CN201373120Y (en) * | 2009-01-15 | 2009-12-30 | 吴江市东吴机械有限责任公司 | Pilot valve |
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2014
- 2014-06-09 CN CN201410252212.9A patent/CN105443841B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122343A (en) * | 2006-08-07 | 2008-02-13 | 株式会社不二工机 | Pilot type control valve |
| CN103292009A (en) * | 2013-05-22 | 2013-09-11 | 吴章杰 | Magnetic driving device and valve body structure based on same |
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| CN105443841A (en) | 2016-03-30 |
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Address after: 312500 Xinchang, Zhejiang Qixing street under the Liquan Applicant after: Zhejiang three flower intelligent control Limited by Share Ltd Address before: 312500 Xinchang, Zhejiang province Qixing street under the village of Liquan Applicant before: Zhejiang Sanhua Co., Ltd. |
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