CN104748457A - Heat expansion valve and valve core component thereof - Google Patents
Heat expansion valve and valve core component thereof Download PDFInfo
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- CN104748457A CN104748457A CN201310740778.1A CN201310740778A CN104748457A CN 104748457 A CN104748457 A CN 104748457A CN 201310740778 A CN201310740778 A CN 201310740778A CN 104748457 A CN104748457 A CN 104748457A
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- valve
- valve core
- spool
- refrigerant
- core assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
The invention discloses a heat expansion valve and a valve core component thereof. The valve core component comprises a valve core sleeve (1) provided with a valve port, and a valve core (2) arranged in the valve core sleeve (1), wherein the valve core (2) has a throttling end part (21) fitting the valve port; the other end part of the valve core (2) is dynamically sealed with the peripheral direction of the inner peripheral wall of the valve core sleeve (1), and is connected with a transfer rod (30) of the heat expansion valve; a refrigerant inlet of the heat expansion valve is communicated with the valve port through a refrigerant channel communicated with the inner peripheral wall and the outer peripheral wall of the valve core sleeve (1); the valve core is not suffered from the effect of high-pressure axial force of refrigerant, so that the influence of the high-pressure fluctuation of the refrigerant on the openness of the valve core is relieved, the valve core dose not generate wrong actions due to the high-pressure fluctuation of the system refrigerant, the automatic adjusting accuracy of the valve port of the heat expansion valve is improved, and under the condition of keeping invariable size of an air tank head, the flow of the valve port is properly increased to improve the system refrigeration capacity; and in addition, the action accuracy of the valve core in the valve core component is higher.
Description
Technical field
The present invention relates to technical field of heat exchange, particularly a kind of heating power expansion valve and core assembly thereof.
Background technology
Heating power expansion valve exports the degree of superheat size of cold-producing medium by the temperature-sensitive system sensing evaporator 300 of self, carry out the open degree of autocontrol valve core, and then change the circulation area that cold-producing medium flows through valve port, thus realize the automatic adjustment of refrigerant flow and the effect of reducing pressure by regulating flow.
Please refer to Fig. 1, Fig. 1 is the main composition structural representation of a kind of typical heat-exchange system in prior art.
Compressor 100, evaporimeter 300, condenser 200, heating power expansion valve 400 is four large primary elements in refrigeration system, system is in day-to-day operation, heating power expansion valve does not mate with system because of refrigerating capacity, ice blocks up easily to cause refrigeration system to occur, the dirty phenomenon such as stifled, and this phenomenon is often because the throttling spool end wear of heating power expansion valve caused, in order to save also in order to reduce handling, apply and the heating power expansion valve of interchangeable this novelty of spool has also just appearred in life, when system occurs that ice blocks up, as long as valve hole part unloaded cleaning during the dirty phenomenon such as stifled or change, and whole valve body need not be changed.
Please refer to the structural representation that Fig. 2-3, Fig. 2 is a kind of detailed description of the invention of core assembly in prior art; Fig. 3 is the structural representation of a kind of typical heating power expansion valve in prior art.
As can be seen from Figure 2, the heating power expansion valve of prior art comprises valve body and core assembly, and core assembly comprises the parts such as Valve core blade 1 ', spool guide ring 2 ', spool 3 ', spool supporting seat 4 ', valve core spring 5 ', valve core spring supporting seat 6 ', valve core housing 7 ' and the filter net seat that formed by screen pack 8 ' and seal receptacle 9 ' riveting.Wherein, first Valve core blade and spool guide ring are riveted tightly in valve core housing 7 ', spool 3 ', spool supporting seat 4 ', valve core spring 5 ' load in valve core housing 7 ' successively with valve core spring supporting seat 6 ', by certain initial tension of spring, spool supporting seat and valve core housing 7 ' are riveted tightly, spool 3 ' has sealing cone, and the sealing conical surface keeps good sealing with the valve port of Valve core blade 1 ' under the effect of valve core spring 5 '.
Wherein, valve core spring supporting seat 6 ' and spool guide ring 2 ' are Rhizoma Sparganii or many prismatics shape, so that cold-producing medium flows into core assembly inside.The sieve pack of screen pack 8 ', seal receptacle 9 ' riveting composition, screen pack 8 ' works the impurity filtered in refrigeration system.When core assembly loads thermal expansion valve insertion, at one end contact the driver blade in air tank head 10 ', the other end under the promotion of the drive link 12 ' of inner chamber through valve body aperture, overcomes the spring force of valve core spring 5 ', is backed down by spool 2 thus carry out Flow-rate adjustment.
As can be seen from said structure, valve core spring 5 ', valve core spring supporting seat 6 ' is all arranged on high-pressure refrigerant inlet flow passage, both ends of the surface for the spool 3 ' of throttling are subject to the effect of the effect from the refrigerant of high pressure chest and the refrigerant from low pressure chamber respectively, and the height pressure reduction of valve port both sides be exist all the time indelible, when there is fluctuation in the condensing pressure (high pressure) of system, active force on spool 3 ' will respective change, valve port will be tending towards closing or opening under the effect of condensing pressure, affect stability in use and the reliability of heating power expansion valve.
Although increase air tank head 10 ' can slow down the impact that above-mentioned pressure oscillation brings to a certain extent, and the size of air tank head 10 ' can not infinitely increase, and so just constrains valve port design size, and then limits the maximum cold of heating power expansion valve.
Therefore, how providing a kind of by the smaller heating power expansion valve of system condensing pressure oscillation, is those skilled in that art's technical problems urgently to be resolved hurrily.
Summary of the invention
Object of the present invention is for providing a kind of core assembly and heating power expansion valve thereof, and the heating power expansion valve with this core assembly is smaller by condensing pressure influence of fluctuations in system.
For solving the problems of the technologies described above, the invention provides a kind of core assembly of heating power expansion valve, comprise the valve core housing being provided with valve port and the spool be located in described valve core housing, described spool has the throttling end coordinated with described valve port, the other end of described spool and the internal perisporium circumference movable sealing of described valve core housing, and this end connects the drive link of described heating power expansion valve, the refrigerant import of described heating power expansion valve is communicated with described valve port by being communicated with the internal perisporium of described valve core housing with the refrigerant passage of periphery wall.
Preferably, the internal chamber wall circumferential seal of the periphery wall of described valve core housing and the valve body of described heating power expansion valve is to isolate described refrigerant passage.
Preferably, the both ends of described valve core housing and the internal chamber wall circumferential seal of described valve body, described refrigerant passage comprises the circulation groove on the perisporium between described valve core housing and the both ends of described valve seal.
Preferably, described refrigerant passage also comprises the high pressure refrigerant chamber surrounded by described spool and described valve core housing, described spool is positioned at the described sections in high pressure refrigerant chamber and the internal perisporium of described valve core housing forms channel-shaped structure, and the projected area of two side in cross section of described groove is equal.
Preferably, also comprise the spring press-fited between described valve core housing and described spool, and described spring is positioned at the outside of described valve core housing and described spool movable sealing end.
Preferably, the cross section of described throttling end increases, so that described valve port is opened in the downward action of the drive link of described heating power expansion valve gradually along the flow direction of refrigerant.
Preferably, spool loads from valve port one end of described valve core housing, and described spool is also provided with pin or the baffle ring of spring described in detachable backstop, described spool is connected in detachable mode with described valve core housing.
Preferably, the notch of described circulation groove is covered with the screen pack for filtering impurity in refrigerant.
Preferably, described core assembly flexibly abuts with described drive link, described core assembly is located near the outer end of the refrigerant exit pipe of the valve body of the end of described valve port and described heating power expansion valve, and described core assembly is connected with the detachable mode of the valve body of described heating power expansion valve.
In core assembly provided by the invention, spool is except throttling end, the refrigerant that the end of the other end connection for transmission bar does not flow in high pressure chest with the refrigerant import from valve body contacts, that is, spool in the axial direction only the end face of throttling end by the low pressure being communicated with refrigerant exit in valve body, the refrigerant high pressure being communicated with the import of valve body refrigerant acts on spool end hardly, namely there is not high-pressure difference in the axial direction in spool, refrigerant high pressure produces axial power hardly to spool, like this, the balance of spool only needs the low pressure considered iris action power and act on the throttling end end face of spool, when evaporator coil does not have pressure drop or pressure drop very little, the power acting on spool two ends is just equal.
When refrigerant high pressure fluctuations in refrigeration system, because spool is not by the effect of refrigerant axial force, axial displacement would not be produced, thus the fluctuation that slow down refrigerant high pressure is on the impact of spool open degree, spool can not produce misoperation because of system high pressure fluctuation, improves the correctness that heating power expansion valve regulates automatically.
And then, when air tank head size remains unchanged, can suitably increase the flow of valve port, improve the refrigerating capacity of system.
In addition, because of connection for transmission bar after the internal perisporium circumference movable sealing of spool and valve core housing, valve core housing can play the effect of guiding to spool, increase spool accuracy of action.
Present invention also offers a kind of heating power expansion valve, comprise valve body, the upper end of described valve body is provided with air tank head, described valve inner is provided with the drive link connecting driver blade in described air tank head and the core assembly be connected with described drive link, and described core assembly is the core assembly described in above-mentioned any one.
Because this heating power expansion valve has above-mentioned core assembly, therefore heating power expansion valve has the above-mentioned technique effect of core assembly.
Accompanying drawing explanation
Fig. 1 is the main composition structural representation of a kind of typical heat-exchange system in prior art;
Fig. 2 is the structural representation of a kind of detailed description of the invention of core assembly in prior art;
Fig. 3 is the structural representation of a kind of typical heating power expansion valve in prior art;
Fig. 4 is the structural representation of core assembly in a kind of detailed description of the invention of the present invention;
Fig. 5 is the sectional view of core assembly shown in Fig. 4;
Fig. 6 is the structural representation of heating power expansion valve in a kind of detailed description of the invention of the present invention;
The valve body structure schematic diagram that Fig. 7 is heating power expansion valve shown in Fig. 6.
Wherein, the one-to-one relationship in Fig. 1 to Fig. 3 between Reference numeral and component names is as follows:
100 compressors, 200 condensers, 300 evaporimeters, 400 heating power expansion valves, 1 ' Valve core blade, 2 ' spool guide ring, 3 ' spool, 4 ' spool supporting seat, 5 ' valve core spring, 6 ' valve core spring supporting seat, 7 ' valve core housing, 8 ' screen pack, 9 ' seal receptacle, 10 ' air tank head, 11 ' diaphragm, 12 ' drive link.
Wherein, the one-to-one relationship in Fig. 4 to 7 between Reference numeral and component names is as follows:
1 valve core housing, 1a through hole, 11 first hermetic terminals, 12 second hermetic terminals, 13 circulation grooves, 14 co-ends, 2 spools, 21 throttling ends, 3 springs, 4 screen packs, 5 second sealing rings, 6 first sealing rings, 7 baffle rings, 10 diaphragms, 20 driver blades, 30 drive links, 40 regulating springs, 50 spring bases, 60 valve bodies, 70 set screw, A pore, B high pressure refrigerant chamber.
Detailed description of the invention
Core of the present invention is for providing a kind of core assembly and heating power expansion valve, and the heating power expansion valve with this core assembly is smaller by condensing pressure influence of fluctuations in system.
Without loss of generality, herein in the detachable heating power expansion valve of spool, be applied as example with core assembly, introduce technical scheme, it will be understood by those skilled in the art that protection domain herein is not only confined to the detachable heating power expansion valve of spool.
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to the structural representation that Fig. 4-7, Fig. 4 is core assembly in a kind of detailed description of the invention of the present invention; Fig. 5 is the sectional view of core assembly shown in Fig. 4; Fig. 6 is the structural representation of heating power expansion valve in a kind of detailed description of the invention of the present invention; The valve body structure schematic diagram that Fig. 7 is heating power expansion valve shown in Fig. 6; Wherein in figure, arrow represents the flow direction of coolant media.
Heat-exchange system comprises and mainly comprises compressor 100, condenser 200, evaporimeter 300 and heating power expansion valve 400, heating power expansion valve 400 is arranged between condenser 200 and evaporimeter 300, near the position of evaporimeter 300, the operation principle of heat-exchange system is mainly as follows: the liquid phase refrigerant that the HTHP vapor phase refrigerant from compressor 100 becomes normal temperature high voltage by condenser 200 heat radiation enters heating power expansion valve 400, after reducing pressure by regulating flow by heating power expansion valve 400, the liquid phase refrigerant of normal temperature high voltage becomes liquid phase (or gas-liquid two-phase) cold-producing medium of Room-temperature low-pressure, the vapor phase refrigerant of low-temp low-pressure is become after the liquid phase refrigerant of Room-temperature low-pressure absorbs heat in evaporimeter 300, finally enter compressor 100, HTHP gas phase refrigeration machine is become after compressor 100 compresses, so complete a circulation.
Heating power expansion valve 400 has valve body 60 and core assembly, the upper end of valve body 60 is provided with air tank head, pressure-sensing device-diaphragm 10 is provided with in air tank head, air tank head is isolated into upper and lower two chambers by diaphragm 10, upper chamber is filled with cold-producing medium or can varies with temperature the material that pressure changes thereupon, the variations in temperature of refrigeration system evaporator 300 exit outer tube wall is experienced by this cold-producing medium of capillary, thus the pressure of filled material in upper chamber changes thereupon, the downward action force that diaphragm 10 is produced also changes thereupon, this downward action force is the opening force of spool 2, diaphragm 10 lower chambers is connected with evaporimeter 300 port of export inside by outer balance pipe, and experience the pressure (and evaporating pressure) of evaporimeter 300 exit cold-producing medium, this power is the closing forces of spool 2.
By the rotation of set screw 70, promote spring base 50 to move upward thus the pretightning force of regulating spring 40, this pretightning force passes to driver blade 20, because driver blade 20 and diaphragm 10 stick together, thus promoting diaphragm 10 upwards action, this power is also the closing forces of spool 2.When the active force of diaphragm 10 2 side is equal, diaphragm 10 is in poised state.When evaporimeter 300 outlet temperature raises (namely the degree of superheat increases), diaphragm 10 downwards active force increases, diaphragm 10 overcomes all the other two downward actions of active force, spool 2 action is downwards promoted by driver blade 20 drive link 30, increase valve port circulation area, the refrigerant flow entering evaporimeter 300 strengthens thereupon, and the evaporating pressure in evaporimeter 300 also increases thereupon, along with the increase of evaporating pressure on the downside of diaphragm 10, diaphragm 10 also balances thereupon again.
The core assembly of heating power expansion valve 400 provided by the invention comprises the valve core housing 1 being provided with valve port and the spool 2 be arranged in valve core housing 1, spool 2 has the throttling end 21 coordinated with described valve port, valve port can need to be designed to different shapes according to design, section such as along axis is arc or taper etc., correspondingly, the throttling end 21 of spool 2 is also designed to the spherical or taper suitable with valve port.
The other end of spool 2 and the internal perisporium circumference movable sealing of valve core housing 1 in the present invention, and this end connects the drive link 30 of heating power expansion valve 400, spool 2 can be connected by removablies such as swollen rivetings with drive link 30, in the promotion of drive link 30 or under pulling, spool 2 can move by valve port relatively, to realize the adjustment that valve port opens aperture, the import refrigerant of heating power expansion valve 400 is communicated with valve port by the internal perisporium of communicating valve core retainer plate 1 with the refrigerant passage of periphery wall, and the end face of such spool 2 near the throttling end of valve port is in by low pressure refrigerant active force.
In core assembly provided by the invention, spool 2 is except throttling end 21, the refrigerant that the end of the other end connection for transmission bar 30 does not flow in high pressure chest with the refrigerant import from valve body 60 contacts, that is, spool 2 in the axial direction only the end face of throttling end 21 by the low pressure (can ignore) being communicated with refrigerant exit in valve body 60, the refrigerant high pressure being communicated with the import of valve body 60 refrigerant acts on spool 2 end face hardly, namely there is not high-pressure difference in the axial direction in spool 2, refrigerant high pressure produces axial power hardly to spool 2, like this, the balance of spool 2 only needs the low pressure considered diaphragm 10 active force and act on throttling end 21 end face of spool 2, when evaporimeter 300 coil pipe does not have pressure drop or pressure drop very little, the power acting on spool 2 two ends is just equal.
When refrigerant high pressure fluctuations in refrigeration system, because spool 2 is not by the effect of refrigerant axial force, axial displacement would not be produced, thus the fluctuation that slow down refrigerant high pressure is on the impact of spool 2 open degree, spool 2 can not produce misoperation because of system high pressure fluctuation, improves the correctness that heating power expansion valve 400 regulates automatically.
And then, when air tank head size remains unchanged, can suitably increase the flow of valve port, improve the refrigerating capacity of system.
In addition, in the present invention, the internal chamber wall circumferential seal of the periphery wall of valve core housing 1 and the valve body 60 of heating power expansion valve 400 is to isolate refrigerant passage, the import refrigerant of heating power expansion valve 400 is communicated with valve port by the internal perisporium of communicating valve core retainer plate 1 with the refrigerant passage of periphery wall, can increase the accuracy that spool 2 moves.
Can various ways be had for arranging of refrigerant passage in valve core housing 1, following present refrigerant passage one preferred embodiment.
In a preferred embodiment, the both ends of valve core housing 1 contact with the internal chamber wall circumferential seal of valve body 60, refrigerant passage comprises the circulation groove 13 on the perisporium between the both ends that seal at valve core housing 1 and valve body 60, the projected area of two side in cross section of circulation groove 13 can be equal, that is, refrigerant high pressure is to the axial force equal and opposite in direction of the two side of circulation groove 13, direction is contrary, namely refrigerant high pressure is zero to valve core housing 1 in the active force summation of axis, and such valve core housing 1 does not have sports tendency vertically.
It should be noted that, cross section refers to the cross section perpendicular to valve core housing 1 axis.
In the various embodiments described above, circulation groove 13 can for the cannelure radially extended, and two cell walls of cannelure are symmetrical about groove center cross section, and two cell walls can be parallel, also can non-parallelly arrange, the axial profile of such as cannelure can be the structures such as isosceles trapezoid; Cannelure processing technology is fairly simple.
Further, in the various embodiments described above, refrigerant passage can also comprise the high pressure refrigerant chamber B surrounded by spool 2 and valve core housing 1, high pressure refrigerant chamber B is communicated with circulation groove 13, the internal perisporium of sections and described valve core housing 1 that spool 2 is positioned at high pressure refrigerant chamber forms channel-shaped structure, the projected area of two side in cross section of groove is equal, like this, after refrigerant flows into high pressure refrigerant chamber B, refrigerant is also zero to high pressure refrigerant chamber B pressure summation vertically, and namely high pressure refrigerant chamber B is zero to spool 2 and valve core housing 1 axial force summation respectively.Which further contemplates the refrigerant High Pressure Difference caused due to the special shape of the throttling end 21 of spool 2, and this set-up mode can counteract refrigerant High Pressure in the pressure of spool 2 throttling end 21.
Particularly, the internal perisporium surrounding the valve core housing 1 of high pressure refrigerant chamber B is in a preferred embodiment column, and spool 2 is positioned at the outline of the restriction portion of high pressure refrigerant chamber B can be symmetrical about the center cross-sectional of this sections.
The passage being communicated with circulation groove 13 and high pressure refrigerant chamber B can for being opened in the through hole on valve core housing 1 perisporium, through hole can be the cylindrical hole smaller to refrigerant flow resistance, also can be other forms of hole, the quantity of through hole can need to select according to design, can be symmetrical arranged.
In the various embodiments described above, core assembly provided by the present invention can also comprise the spring press-fited between valve core housing 1 and spool 2, and described spring is positioned at the outside of described valve core housing 1 and described spool 2 movable sealing end; The Main Function of spring is the gravity overcoming frictional force between spool 2 and valve core housing 1 and spool 2, makes spool 2 and valve port play pre-shutdown effect.
Spring fitting is in the outside of high pressure chest, such spring and all can not be subject to the active force of refrigerant high pressure in high pressure chest in order to the parts such as spring mounting seat of mounting spring, further guarantee spool 2 axially not by the impact of axial force, also can increase the design flexibility of parts such as spring base 50 grade simultaneously.
Particularly, the cross section of spool in the various embodiments described above 2 and valve port mating surface increases gradually along the flow direction of refrigerant.
In a kind of concrete embodiment, spool 2 loads from valve port one end of valve core housing 1, namely valve port is coaxial with valve core housing 1, spool 2 is also provided with pin or the baffle ring 7 of spring 3 described in detachable backstop, spool 2 is connected in detachable mode with valve core housing 1, valve core housing can be designed as the form of Connection Block near the end of valve port, and for connecting exterior line, and its circumference is sealed and matched with valve core housing 1.Core assembly in above-described embodiment, after dismantling pin or baffle ring 7, just can take apart the valve port end of spool 2 from valve core housing 1; Spool 2 and valve core housing 1 are designed to detachable form by this version further, are convenient to change spool 2.
In a preferred embodiment, above-mentioned core assembly flexibly abuts with drive link 30, core assembly is located near the outer end of the refrigerant exit pipe of the valve body 60 of the end of valve port and heating power expansion valve, and core assembly is connected with the detachable mode of valve body 60 of heating power expansion valve.
Directly being flowed out by the refrigerant exit pipe of valve body 60 without the need to turning round through the refrigerant of throttling expansion in this embodiment, media flow resistance can be reduced, when refrigerant has certain degree of supercooling, in valve body 60, sudden strain of a muscle gas would not be produced, improve the refrigeration of refrigeration system.
Further, this structure is conducive to core assembly and takes apart from the refrigerant exit of valve body 60 fast, reduces waste.
In order to improve in system the cleannes of the coolant media that circulates, the notch of circulation groove 13 is covered with the screen pack 4 for filtering impurity in refrigerant.Screen pack 4 can be welded in valve core housing 1 by spot welding or roll welding.
Certainly, in order to increase the sealing between two parts sealing contact, sealing ring parts can also be set at sealing contact position, as shown in the figure, valve core housing 1 and the hermetic terminal position of valve body 60 be provided with seal groove, in seal groove, is provided with the first sealing ring 6; In like manner, spool 2 and the position of valve core housing 1 movable sealing are provided with the second sealing ring 5 and install the seal groove of the second sealing ring 5.
Fig. 6-7 please be refer again to, present invention also offers a kind of heating power expansion valve 400, comprise valve body 60, the upper end of described valve body 60 is provided with air tank head, described valve body 60 inside is provided with the drive link 30 connecting driver blade 20 in described air tank head and the core assembly be connected with drive link 30, and core assembly is the core assembly described in above-mentioned any embodiment.
Because this heating power expansion valve 400 has above-mentioned core assembly, therefore heating power expansion valve 400 has the above-mentioned technique effect of core assembly.
Above a kind of heating power expansion valve provided by the present invention and core assembly thereof are described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. the core assembly of a heating power expansion valve, it is characterized in that, comprise the valve core housing (1) being provided with valve port and the spool (2) be located in described valve core housing (1), described spool (2) has the throttling end (21) coordinated with described valve port, the other end of described spool (2) and the internal perisporium circumference movable sealing of described valve core housing (1), and this end connects the drive link (30) of described heating power expansion valve, the refrigerant import of described heating power expansion valve is communicated with described valve port by the internal perisporium being communicated with described valve core housing (1) with the refrigerant passage of periphery wall.
2. core assembly as claimed in claim 1, it is characterized in that, the internal chamber wall circumferential seal of the periphery wall of described valve core housing (1) and the valve body (60) of described heating power expansion valve is to isolate described refrigerant passage.
3. core assembly as claimed in claim 2, it is characterized in that, the both ends of described valve core housing (1) and the internal chamber wall circumferential seal of described valve body (60), described refrigerant passage comprises the circulation groove (13) on the perisporium that is positioned between both ends that described valve core housing (1) and described valve body (60) seal.
4. core assembly as claimed in claim 2, it is characterized in that, described refrigerant passage also comprises the high pressure refrigerant chamber surrounded by described spool (2) and described valve core housing (1), the internal perisporium of sections and described valve core housing (1) that described spool (2) is positioned at described high pressure refrigerant chamber forms channel-shaped structure, and the projected area of two side in cross section of described groove is equal.
5. the core assembly as described in any one of Claims 1-4, it is characterized in that, also comprise the spring (3) press-fited between described valve core housing (1) and described spool (2), and described spring (3) is positioned at the outside of described valve core housing (1) and described spool (2) movable sealing end.
6. core assembly as claimed in claim 5, is characterized in that, the cross section of described throttling end (21) increases, so that described valve port is opened in the downward action of the drive link of described heating power expansion valve gradually along the flow direction of refrigerant.
7. core assembly as claimed in claim 6, it is characterized in that, spool (2) loads from valve port one end of described valve core housing (1), described spool (2) is also provided with pin or the baffle ring of spring (3) described in detachable backstop, described spool (2) is connected with described valve core housing (1) detachable mode.
8. core assembly as claimed in claim 2, it is characterized in that, the notch of described circulation groove (13) is covered with the screen pack (4) for filtering impurity in refrigerant.
9. the core assembly as described in any one of Claims 1-4, it is characterized in that, described core assembly flexibly abuts with described drive link (30), described core assembly is located near the outer end of the refrigerant exit pipe of the valve body (60) of the end of described valve port and described heating power expansion valve, and described core assembly is connected with valve body (60) the detachable mode of described heating power expansion valve.
10. a heating power expansion valve, comprise valve body (60), the upper end of described valve body (60) is provided with air tank head, described valve body (60) inside is provided with the drive link (30) connecting driver blade in described air tank head and the core assembly be connected with described drive link (30), it is characterized in that, described core assembly is the core assembly described in any one of claim 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310740778.1A CN104748457B (en) | 2013-12-27 | 2013-12-27 | A kind of heating power expansion valve and its core assembly |
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| CN201310740778.1A CN104748457B (en) | 2013-12-27 | 2013-12-27 | A kind of heating power expansion valve and its core assembly |
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| CN104748457A true CN104748457A (en) | 2015-07-01 |
| CN104748457B CN104748457B (en) | 2017-12-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094525A (en) * | 2018-01-31 | 2019-08-06 | 浙江三花制冷集团有限公司 | A kind of motor-driven valve and its manufacturing method |
| CN112539284A (en) * | 2019-09-20 | 2021-03-23 | 浙江三花制冷集团有限公司 | Flow control valve |
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| CN102589207A (en) * | 2011-01-14 | 2012-07-18 | 浙江三花股份有限公司 | Refrigeration system and thermostatic expansion valve thereof |
| CN202023972U (en) * | 2011-03-04 | 2011-11-02 | 丹佛斯（天津）有限公司 | Thermal expansion valve |
| CN102758965A (en) * | 2011-04-27 | 2012-10-31 | 浙江三花股份有限公司 | Thermostatic expansion valve |
| CN103075565A (en) * | 2011-10-26 | 2013-05-01 | 浙江三花股份有限公司 | Thermal expansion valve and thermal expansion valve assembling method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110094525A (en) * | 2018-01-31 | 2019-08-06 | 浙江三花制冷集团有限公司 | A kind of motor-driven valve and its manufacturing method |
| CN110094525B (en) * | 2018-01-31 | 2021-07-30 | 浙江三花制冷集团有限公司 | Electrically operated valve and manufacturing method thereof |
| CN112539284A (en) * | 2019-09-20 | 2021-03-23 | 浙江三花制冷集团有限公司 | Flow control valve |
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| CN104748457B (en) | 2017-12-15 |
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