CN101776176A - Thermal power expansion valve - Google Patents
Thermal power expansion valve Download PDFInfo
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- CN101776176A CN101776176A CN200910076335A CN200910076335A CN101776176A CN 101776176 A CN101776176 A CN 101776176A CN 200910076335 A CN200910076335 A CN 200910076335A CN 200910076335 A CN200910076335 A CN 200910076335A CN 101776176 A CN101776176 A CN 101776176A
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Abstract
The invention discloses a thermal power expansion valve, which comprises a valve body, a spherical valve core, a temperature sensing driving part, a compression helical spring and a regulating screw, wherein the valve body is provided with a valve chamber which is used for a high-pressure coolant to flow into the valve chamber through a high-pressure side passage and a low-pressure side passage which is used for flowing out a low-pressure coolant from the valve chamber through a valve hole; the spherical valve core is arranged on an upstream side of the valve hole; the temperature sensing driving part is used for driving a transmission bar; the transmission bar moves the valve core arranged at the upper end of the valve body towards a valve opening direction; the compression helical spring is arranged in the valve chamber and pushes the valve core towards a valve closing direction; the regulating screw is arranged on the lower part of the valve body and is used for regulating the pretightening force of the compression helical spring; the valve core adjusts the flow quantity of the coolant passing through valve hole; and a valve core rack for supporting the valve core is arranged between the valve core and the compression helical spring, and simultaneously the valve core rack is fixed on the compression helical spring. On the basis of not increasing the number of components, the thermal power expansion valve not only can make the motion of the compression helical spring stable, but also can reduce or prevent abnormal sounds to correctly control the flow quantity of the coolant.
Description
Technical field
The present invention relates to a kind of heating power expansion valve, particularly be applicable to the heating power expansion valve of air conditioning system for automotive vehicles.
Technical background
The type of heating power expansion valve is various, and one of them for example connects the block heating power expansion valve that vaporizer is imported and exported.This heating power expansion valve together constitutes refrigeration cycle by pipeline and compressor, condenser, vaporizer.
The heating power expansion valve that constitutes this refrigeration cycle is a kind of known expansion valve, the path that the high pressure refrigerant that flows at condenser passes through is provided with valve opening midway, and be provided with spherical spool with the configuration of upstream side subtend, the low pressure refrigerant temperature and pressure of discharging according to vaporizer changes, and spool is connect from valve opening.
As for the formation summary of existing heating power expansion valve, ask for an interview central longitudinal sectional view as shown in Figure 7.
The aluminum valve body 7 of the bulk of heating power expansion valve 1 among Fig. 7 (being the corner post shape) is by refrigerant is supplied to first path 4 of vaporizer 3 import 3a by cistern 2b and the alternate path 6 that the refrigerant that vaporizer 3 outlet 3b discharge supplies to compressor 5 is formed from condenser 2a.First path 4 and alternate path 6 spaces are arranged on the upper and lower of valve body 7.
First path 4 by the low voltage side path 4a that is connected with the import 3a of vaporizer 3 and the high pressure side path 4b that is connected with condenser 2a and cistern 2b with low voltage side path 4a is constituted with the valve opening 8 that high pressure side path 4b is connected.Alternate path 6 laterally wears 5 the import from evaporator outlet 3b to compressor.
The heat insulation expansion of liquid coolant that valve opening 8 is supplied with cistern 2b, and valve opening 8 has along valve body 7 axial central axis.The import of the upstream side of valve opening 8 is formed with valve seat 8a, and the spherical spool 9 on its valve seat 8a drives by the pretension parts that compression helical spring 10 is constituted.Low voltage side path 4a relatively high pressure side path 4b horizontal being arranged on the valve body 7 that misplace.The outlet passage 4a1 opening of low voltage side path 4a relative with the end face 21b of the valve body 7 of the inlet passage 4b1 opening of high pressure side path 4b to end face 21a on, connect the import 3a of vaporizer 3 on the open end of outlet passage 4a1.
The high pressure side path 4b that imports for the liquid coolant of cistern 2b has described inlet passage 4b1 and the valve chamber 11 that is connected with its inlet passage 4b1, this valve chamber 11 for the bottom compartment that has of the coaxial formation of center line of valve opening 8, and by adjusting screw 12 sealings.
Therefore, form described valve chamber 11 between the high pressure side path 4b of the liquid coolant importing of confession cistern 2b and the low voltage side path 4a.Valve chamber 11 links to each other with inlet passage 4b1, and described valve opening 8 is formed at the top of valve chamber 11.Thereby high pressure side path 4b and low voltage side path 4a are communicated with by valve opening 8 and valve chamber 11.
Compression helical spring 10 in the valve chamber 11 is arranged between the valve core frame 13 and described adjusting screw 12 that supports described spherical spool 9, and described spherical spool 9 is by compression helical spring 10 and utilize the valve core frame 13 that supports described spool 9 to move.
12a is the O shape circle that is arranged between described adjusting screw 12 and the valve body 7.
Last drive link 15f in the transmitting assemblies 15 is connected with diaphragm 16, and this diaphragm 16 is enclosed in the temperature-sensitive drive portion 17 that the upper end portion of valve body 7 assembles, all pressures chamber 19 that described temperature-sensitive drive portion 17 is divided into diaphragm chamber 18 and is connected with alternate path 6.Fill known diaphragm driven medium by capillary tube 18a in the diaphragm chamber 18.The diaphragm driven medium of diaphragm chamber 18 utilizes the transmitting assemblies 15 and the refrigeration agent of alternate path 6 sides to carry out transmission of heat, and the driven medium of diaphragm gasifies according to the heat that it conducted, its pressure act on diaphragm 16 above.When its pressure utilizes described drive link assembly 15 to be in the position of balancing each other with the power that acts on described diaphragm 16 by compression helical spring 10, spherical spool 9 actions, form near or away from the state of valve seat 8a.
By regulating the aperture of valve opening 8, control flows to the cold medium flux of the low voltage side path 4a that leads to vaporizer 3 from the inlet passage 4b1 of high pressure side path 4b.
Therefore, make the refrigerant heat insulation expansion of high pressure side path 4b to low voltage side path 4a by spherical spool 9 and valve opening 8, its refrigerant supplies to the import 3a of vaporizer 3 from the outlet passage 4a1 of low voltage side path 4a then.
By described heating power expansion valve as can be known, the highly pressurised liquid refrigerant that is imported in the inlet passage 4b1 of high pressure side path 4b, in freeze cycle, when upstream side sharply produces pressure oscillation and flow change, it is unbalanced to produce pressure around the spherical spool 9, thereby causes described spherical spool 9 vibrative phenomenons.When spherical spool 9 produced vibration, instability then appearred in the action of this spherical spool 9, thereby was difficult to correct control cold medium flux by 9 of described spherical spools.Therefore, described expansion valve can produce noise.
In order to prevent the vibration of described spherical spool 9, Patent Document 1 provide a kind of to described spherical spool 9 the upper end and the lower end of the underdrive bar 15g of described transmitting assemblies 15 implement welding, and the scheme that the lower end and the described valve core frame 13 of described spherical spool 9 are implemented welding.
By welding described spherical spool 9, though can prevent the extensional vibration of described spherical spool 9, but the vibration of the described spherical spool 9 that is subjected to the change of the pressure oscillation of described highly pressurised liquid refrigerant and flow and influences, also can be described as the vibration (promptly with the perpendicular vibration of the pretension direction of described compression helical spring 10) of described valve core frame 13, just so-called transverse vibration but can not effectively be suppressed.
When producing transverse vibration, bending or twisted state might appear in described compression helical spring 10, thereby, the action of described compression helical spring 10 occurs unstable, and then described spherical spool 9 and valve core frame 13 just might produce different sound, finally causes the control cold medium flux that described spherical spool 9 can not be correct.
For bending or the twisted state that prevents described compression helical spring 10, existing Patent Document 2 provides a kind of cylindrical portion that is provided with along described compression helical spring 10 and the scheme of guide portion.By the structure of described compression helical spring 10 as can be known, increased some new parts, thereby increased the component number, complicated assembling work, and then caused the rising of cost.
[Patent Document 1] spy opens flat 11-182984 communique
[Patent Document 2] spy opens clear 51-106258 communique
[Patent Document 3] speciallyyed permit out hope and disclosed flat 4-208375 communique
Summary of the invention
The objective of the invention is, a kind of heating power expansion valve is provided, to address the above problem, on the basis that does not increase the component number, not only can avoid the action wild effect of the described compression helical spring that causes because of the change of the pressure oscillation of high pressure refrigerant or flow, but also can reduce or prevent the generation of different sound, correct control cold medium flux.
For solving above-mentioned problem, heating power expansion valve of the present invention comprises valve body; This valve body has valve chamber that flows into by the high pressure side path for the high pressure refrigerant and the low voltage side path that flows out by valve opening from described valve chamber for low pressure refrigerant;
Also comprise the spherical spool that is arranged on described valve opening upstream side, the temperature-sensitive drive portion that drives drive link; Described drive link moves the described spool that described valve body upper end is provided with to valve opening position;
And be configured in the described valve chamber and with described spool to closing the compression helical spring that the valve direction promotes;
Be arranged on the bottom of described valve body, be used for regulating the adjusting screw of described compression helical spring pretightening force;
Regulate the cold medium flux of the described valve opening of flowing through by described spool;
Support the valve core frame of described spool, when being arranged between described spool and the described compression helical spring, described valve core frame is fixed on the described compression helical spring.
One preferred embodiment in, described fixedly is that described valve core frame is pressed in the described compression helical spring.
One preferred embodiment in, described being pressed into is that the protuberance that will be provided with on the described valve core frame is embedded in the described compression helical spring, described protuberance is integrally formed in the reverse side of the side that contacts with spherical spool on the described valve core frame.
One preferred embodiment in, described valve core frame has the blade of a sword portion that is one with described protuberance.
One preferred embodiment in, described blade of a sword portion is supported by an end of described compression helical spring, the other end of described compression helical spring is supported by described adjusting screw.
One preferred embodiment in, described drive link passes described valve opening and contacts with described spherical spool, and described spherical spool contacts with described valve core frame and disposes, described each contact position is fixed by spot welding.
One preferred embodiment in, contacting of described spherical spool and described valve core frame is that described spherical spool is configured in the cylindrical wall portion that is provided with on the described valve core frame.
One preferred embodiment in, described adjusting screw by round plate and the cylindric guide portion that vertically is arranged on the round plate constitute, described compression helical spring is along the inwall setting of described cylindric guide portion.
One preferred embodiment in, an end of described compression helical spring supports the blade of a sword portion that is provided with on the described valve core frame, and the other end of described compression helical spring supports by round plate, described compression helical spring drives described spherical spool.
One preferred embodiment in, described valve core frame has the cylindrical wall portion that connects as one with described blade of a sword portion, simultaneously, described valve core frame is formed with slightly cylindrical protuberance on the opposite direction of described cylindrical wall portion, described slightly cylindrical protuberance and middle described blade of a sword portion and described cylindrical wall portion connect as one, and described spherical spool is arranged in the described cylindrical wall portion.
One preferred embodiment in, the lower end of described spherical spool is fixed by implementing spot welding, described protuberance is pressed in the described compression helical spring, thus fixing described valve core frame, and the upper end of described spherical spool is fixed on the lower end of described drive link by spot welding.
One preferred embodiment in, described compression helical spring forms the tower shape, simultaneously, described being pressed into is that thin footpath tip side by the protuberance that will be provided with on the described spool supporting member is embedded in described compression helical spring is implemented, and the particle size side of described compression helical spring is supported by described adjusting screw.
One preferred embodiment in, described valve core frame has the blade of a sword portion that links to each other with described protuberance and form as one.
One preferred embodiment in, the described thin footpath tip side of described compression helical spring supports described blade of a sword portion, simultaneously, the particle size side of described compression helical spring is supported by described adjusting screw.
One preferred embodiment in, the protuberance of described valve core frame is integrally formed in the reverse side of the side that contacts with described spherical spool of described valve core frame.
One preferred embodiment in, described spherical spool and described valve core frame contact be by described spherical spool is arranged on the described valve core frame realize in the cylindrical wall portion that vertically is provided with.
The present invention has following effect:
Heating power expansion valve of the present invention, because described valve core frame is fixed on the described compression helical spring, thereby form the structure that described compression helical spring is subjected to described valve core frame constraint, and then prevented the crooked of described compression helical spring or distortion, avoided described compression helical spring to move unsettled phenomenon.So, can prevent the generation of different sound, realize correct cold medium flux control.
In addition, owing to being is pressed into described valve core frame to be fixed in the described compression helical spring,, can realize the structure of described compression helical spring so do not need to append other new component.
And, because described fixing is not to adopt welding (for example soldering), so, described compression helical spring can not cause being influenced by heat because of welding, and then described compression helical spring can not produce stiffness variation being influenced by heat the back, therefore, can correctly control cold medium flux.
Moreover, because described being pressed into is that the protuberance that will form on the described valve core frame is embedded in the described compression helical spring, so the assembling work of described valve core frame and described compression helical spring is comparatively simple.
Moreover, because described protuberance is provided with the blade of a sword portion that connects as one with described protuberance, so, can realize the support of described compression helical spring easily.
Moreover, described compression helical spring can be configured between described adjusting screw and the described valve core frame fully by described blade of a sword portion.
Moreover, described drive link, described spherical spool and described valve core frame all are to realize incorporate action relationships by spot welding, not only can realize driving described spherical spool fully by the described compression helical spring that described valve core frame is fixed, also can suppress the crooked or distortion that described compression helical spring produces simultaneously, thereby can avoid described compression helical spring to move unsettled phenomenon easilier, and then prevented the generation of noise, reached the purpose of correct control cold medium flux.
In addition, be configured in owing to described spherical spool in the cylindrical wall portion of described valve core frame setting, so when implementing spot welding, can implement fully.
In addition, described adjusting screw is made of round plate and cylindric guide portion, described compression helical spring is along the wall portion of described cylindric guide portion and dispose, promptly, described inwall acts on as the guiding means that dispose compression helical spring, therefore, the crooked or distortion that described compression helical spring produced is suppressed by described inwall, thereby can further avoid the action wild effect because of the crooked or described compression helical spring that distortion is produced of described compression helical spring.So, when can preventing noise, control cold medium flux that also can be good.
In addition, described compression helical spring disposes along described inwall, because an end of described compression helical spring is supported in the blade of a sword portion that is provided with on the described valve core frame, the other end of described compression helical spring is supported by the round plate of described adjusting screw, so, can correctly dispose described adjusting screw.And then described compression helical spring also can correctly be implemented to drive to described spherical spool.
In addition, described valve core frame has the cylindrical wall portion that connects as one with described blade of a sword portion and form, and described spherical spool can be set in this cylindrical wall portion, thereby can dispose described valve core frame under described spherical spool stable status.In addition and since described valve core frame have in the middle of with described blade of a sword portion serving as relative with described cylindrical wall portion to slightly cylindrical protuberance, so described valve core frame can be used as described protuberance is fixed on means in the described compression helical spring.
In addition, described drive link and described spherical spool and described valve core frame be owing to being to combine to fix, so this three-parts configuration becomes a kind of incorporate action relationships, and then the crooked or distortion that produced of the described compression helical spring of inhibition that can be good.So described compression helical spring can be stablized and correct action.
And then, can prevent the generation of noise by described compression helical spring, and, also can make described spherical spool and described valve core frame stable to closing the action that the valve direction drives.
Description of drawings
Fig. 1 is the major component sectional view of the heating power expansion valve of embodiment of the present invention 1.
Fig. 2 is the valve core frame of the heating power expansion valve among Fig. 1 and the tectonic maps of compression helical spring.
Fig. 3 is the tectonic maps of valve core frame and compression helical spring in the mode of execution 2.
Fig. 4 is the major component sectional view of the heating power expansion valve of mode of execution 3.
Fig. 5 is the major component sectional view of the heating power expansion valve of mode of execution 4.
Fig. 6 is the major component sectional view of the heating power expansion valve of mode of execution 5.
Fig. 7 is the longitudinal section of existing heating power expansion valve.
The simple declaration of reference numeral:
20,20 ': heating power expansion valve 21: spherical spool
22a ': wall cylindraceous portion 22,22 ': valve core frame
23,23 ': valve core frame 22,22 ' protuberance 24,24 ': valve core frame 22,22 ' blade of a sword portion
25: compression helical spring 26 ', 27 ': the spot welding position
12,28: adjusting screw 28a: round plate
28b: cylindric guide portion 28c: inwall
28d: frock patchhole 29: sealing is enclosed with O shape
30: heating power expansion valve 31: valve core frame
31 ': valve core frame 32: the protuberance of valve core frame 31
33: the 22a ' of blade of a sword portion, 34: wall cylindraceous portion
34 ': the wall 22b ' of portion cylindraceous, 35: annulus portion
35 ': annulus portion 37: blade of a sword portion
38: tower shape compression helical spring 381: thin footpath tip side
382: the particle size side
Embodiment
Describe a mode of execution of heating power expansion valve of the present invention referring now to Fig. 1, Fig. 2.
Fig. 1 is the major component sectional view of the heating power expansion valve of mode of execution 1.Fig. 2 is the valve core frame of same heating power expansion valve and the tectonic maps of compression helical spring.The part that Fig. 1 is identical with existing heating power expansion valve shown in Figure 7 is represented with prosign.
And the symbol 20 among Fig. 1 is the heating power expansion valve of embodiment of the present invention 1, and the structure of itself and existing heating power expansion valve 1 shown in Figure 7 is basic identical.
Therefore mode of execution 1 part identical with Fig. 7 represented with prosign, saves detailed description.Feature of the present invention, owing to mainly be the master that constitutes with valve core frame 22 and compression helical spring 25, so, the major component of this part as heating power expansion valve 20 described.
The heating power expansion valve 20 of mode of execution shown in Figure 1, described temperature-sensitive drive portion 17 by the corresponding action of low pressure refrigerant temperature and pressure sent with described vaporizer 3, and driving underdrive bar 15g, described spherical spool 21 controls flow into the cold medium flux of described vaporizer 3.As shown in Figure 2, described spherical spool 21 setting that contacts with described valve core frame 22.In addition, the surface of contact of described valve core frame 22 is represented with symbol 22a.Described surface of contact 22a forms a recess as shown in Figure 2.Described valve core frame 22 is made (for example being formed by stainless steel material) for metal, and, described valve core frame 22 relative with the described surface of contact of described spherical spool 21 to direction on be formed with slightly cylindrical protuberance 23, described protuberance 23 is connected as one with blade of a sword portion 24.And described blade of a sword portion 24 is between described surface of contact 22a and described protuberance 23.
As shown in Figure 2, dispose compression helical spring 25 between described blade of a sword portion 24 and the described adjusting screw 12.One end of described compression helical spring 25 is supported by described blade of a sword portion 24, and the other end of described compression helical spring 25 is supported by described adjusting screw 12.
And the protuberance 23 of described valve core frame 22 is pressed into the distolateral and lived by described compression helical spring 25 is embedded of described compression helical spring 25.Be pressed into by it, described valve core frame 22 is fixed on the described compression helical spring 25.By described valve core frame 22 is fixed on the described compression helical spring 25, and make the described compression helical spring 25 of described valve core frame 22 constraints.
In addition, for example adopt silk footpath d, the inner diameter D of stainless described compression helical spring 25 and the diameter D1 of described protuberance 23 for example to be respectively 1.42mm, 4.9mm and 5.1mm by the described material of fixing that is pressed into.
And then, be tied by making described compression helical spring 25, avoid the wild effect of described compression helical spring 25 actions that cause because of the pressure oscillation that flow into the high pressure refrigerant in the described high pressure side path 4b and flow change.
That is, described valve body 7 has described high pressure side path 4b and the described valve opening 8 that the low voltage side path 4a that refrigerant is flowed out is connected, and regulates control by the cold medium flux of this valve opening 8 by described spherical spool 21.
The adjusting of this cold medium flux is flow control, by being driven the underdrive bar 15g that will described spherical spool 21 moves to valve opening position by described temperature-sensitive drive portion 17 and described spherical spool 21 being implemented to the described compression helical spring that closes the driving of valve direction.
And, heating power expansion valve of the present invention, even because of the pressure oscillation of described high pressure refrigerant and the vibration of the described spherical spool 21 of flow change causing, and then when causing the vibration of described valve core frame 22 owing to the vibration of described spherical spool 21, described valve core frame 22 also can be used as the constraint means of the described compression helical spring 25 of constraint and the generation effect.And then, can avoid the unsettled phenomenon of described compression helical spring 25 actions crooked or that distortion causes occurring because of described compression helical spring 25.
Finally can prevent because of the unstable different mail topic that causes of described compression helical spring 25 actions.In addition, by described spherical spool 21, control cold medium flux that also can be correct.
The described valve core frame 22 of heating power expansion valve of the present invention, the generation effect owing to the constraint means that can be used as the described compression helical spring 25 of constraint, so, even the change of pressure oscillation or flow in freeze cycle, occurs, also can guarantee the operating stably of described compression helical spring 25, thereby control cold medium flux that can be correct prevents that different sound from changing the generation of noise into.
Heating power expansion valve of the present invention is with the constraint means of described valve core frame 22 as the described compression helical spring 25 of constraint, owing to not needing to increase other new parts, so assembling work is comparatively simple.
Fig. 3 is the valve core frame of mode of execution 2 and the tectonic maps of compression helical spring.Among Fig. 3 the formation of heating power expansion valve with mode of execution 1 in the formation of heating power expansion valve 20 identical, so ensuing explanation is valve core frame and compression helical spring based on the feature of mode of execution 2 heating power expansion valves 20 mainly.
Among Fig. 3 of mode of execution 2, symbol 22 ' is for supporting the valve core frame of described spherical spool 21.Described valve core frame 22 ' is formed with the vertical wall 22a ' of portion cylindraceous on described spherical spool 21 and the contacted surface of contact of described valve core frame, the lower end of the described spherical spool 21 on the described cylindrical wall 22a ' of portion, the annulus portion 22b ' set with the top of the described wall 22a ' of portion cylindraceous contacts, and, on its surface of contact, implement spot welding, thereby the contact position is realized fixing, and its welding part is represented with symbol 27.The lower end of the upper end of described spherical spool 21 and described underdrive bar 15g is fixed by spot welding, and its welding part is represented with symbol 26.The slightly cylindrical protuberance 23 ' of described valve core frame 22 ' forms as one with the described wall 22a ' of portion cylindraceous, this protuberance 23 ' be formed at end face with the described valve core frame 22 ' that is fixed with described spherical spool 21 relative to end face on.Be provided with blade of a sword portion 24 ' between described slightly cylindrical protuberance 23 ' and the described wall 22a ' of portion cylindraceous, described blade of a sword portion 24 ' and described protuberance 23 ' and the described wall 22a ' of portion one are formed by connecting.Described protuberance 23 ' in this formation is inserted in the described compression helical spring 25 by being pressed into, and described blade of a sword portion 24 ' is supported in the upper end of described compression helical spring 25.
Thereby described valve core frame 22 ' is fixed on the described compression helical spring 25.Therefore, described valve core frame 22 ' can be used as the constraint means of described compression helical spring 25 and the generation effect.Promptly, because described compression helical spring 25 is by described valve core frame 22 ' constraint, so the action of described compression helical spring 25 is limited, and then having suppressed the crooked of described compression helical spring 25 or distortion, the elastic force of described compression helical spring 25 can be correct acts on described spherical spool 21.Therefore, even the pressure oscillation of described high pressure refrigerant or the change of cold medium flux have occurred, crooked or the distortion of described compression helical spring 25 also can be suppressed, thereby the unsettled phenomenon of described compression helical spring 25 actions also can be avoided, so just can implement correct pretightening force to described spherical spool 21, and then, can prevent to vibrate the generation of different sound, and control cold medium flux that can be correct.In addition, in the heating power expansion valve 20 of the present invention, since described underdrive bar 15g, described spherical spool 21 and described valve core frame 22 ' each other all by spot welding fix form as a whole, so, the molar behavior relation that constitutes heating power expansion valve 20 also can be avoided the unsettled phenomenon of described compression helical spring 25 actions, and then can prevent that also generation because of described different sound from causing the generation of noise, and, by the correct switch valve action of described spherical spool 21, control cold medium flux that also can be correct.
Mode of execution 2 and the mode of execution 1 the same heating power expansion valve 20 that all is suitable for, described spherical spool 21 can be controlled cold medium flux too.Promptly, heating power expansion valve 20 makes underdrive bar 15g action by the temperature-sensitive drive portion 17 of the corresponding action of low pressure refrigerant temperature and pressure sent with vaporizer 3, thereby described spherical spool 21 is to the valve opening position start, or by described compression helical spring 25 described spherical spool 21 is driven to closing the valve direction, adjust the cold medium flux that is sent to described vaporizer 3 by described spherical spool 21 like this.
In addition, because described underdrive bar 15g, described spherical spool 21 and described valve core frame 22 ' interfix, so, heating power expansion valve 20 in the described mode of execution 2 can prevent that described compression helical spring 25 from producing bending or distortion because of being subjected to pressure oscillation of described high pressure refrigerant or cold medium flux variable effect, and then can avoid the unsettled phenomenon of described compression helical spring 25 actions, this structure is owing to can further guarantee the stability of described compression helical spring 25 actions, so when can correctly control cold medium flux, can prevent that also generation because of different sound from causing the generation of noise.
In addition, being bonded with each other between described drive link 15g, described spherical spool 21 and the described valve core frame 22 ', owing to realize by spot welding, so do not need complicated assembling work can obtain the firm engagement of three parts, and then can realize the stability of described compression helical spring 25 actions.
Fig. 4 is the major component sectional view of mode of execution 3 heating power expansion valves.The part that this Fig. 4 is identical with heating power expansion valve shown in Figure 7 represents with prosign, and the structure of this Fig. 4 is identical with the essential structure of existing heating power expansion valve 1 shown in Figure 7.But Fig. 4 and existing thermal expansion valve constitution shown in Figure 7 unique different be adjusting screw 12.Therefore, be primarily aimed at the characteristic of the heating power expansion valve 20 ' of mode of execution shown in Figure 44, promptly describe with the represented adjusting screw of symbol 28 and described compression helical spring 25 and described spherical spool 21.
The heating power expansion valve 20 ' of mode of execution 3 makes underdrive bar 15g action by the temperature-sensitive drive portion 17 of the corresponding action of low pressure refrigerant temperature and pressure sent with vaporizer 3, thereby 21 controls of described spherical spool are sent to the cold medium flux of described vaporizer 3.Described spherical spool 21 contacts with described valve core frame 22 and disposes.Described valve core frame 22 is made (for example stainless steel material) for metal, and, described valve core frame 22 relative with described spherical spool 21 contacted end faces to end face on formed protuberance 23 form as one with blade of a sword portion 24.
Dispose compression helical spring 25 between described blade of a sword portion 24 and the described adjusting screw 12.One end of described compression helical spring 25 supports described blade of a sword portion 24, and the other end of described compression helical spring 25 is supported by described adjusting screw 28.In addition, described adjusting screw 28 is made the round plate 28a of (for example aluminum) by metallic material and vertically is arranged on round plate 28a and upward and to the cylindric guide portion 28b that described valve core frame side is extended constitutes, and described cylindric guide portion 28b and round plate 28a form as one.Therefore, described compression helical spring 25 is along the inwall 28c of described cylindric guide portion 28b and dispose, the other end of described compression helical spring 25 contacts with the upper end of the described round plate 28a of described adjusting screw 28, and described adjusting screw 28 supports described compression helical spring 25.
As mentioned above, the protuberance 23 of described valve core frame 22 is pressed into the distolateral of the described compression helical spring 25 that is provided with along the inwall 28c of described adjusting screw 28, and embedded by described compression helical spring 25.Be pressed into by it, described valve core frame 22 is fixed on the described compression helical spring 25.By described valve core frame 22 is fixed on the described compression helical spring 25, and make the described compression helical spring 25 of described valve core frame 22 constraints.
And described compression helical spring 25 is provided with along the inwall 28c of described adjusting screw 28, and described inwall 28c moves as the guide portion of the external diameter of described compression helical spring 25, can prevent the crooked or distortion of described compression helical spring 25.
By of the described inwall 28c configuration (be described inwall 28c guide portion as described compression helical spring 25) of described compression helical spring 25 restrained and described compression helical springs 25, can avoid changing the unsettled phenomenon of described compression helical spring 25 actions that causes because of the pressure oscillation of high pressure refrigerant and the flow that flow in the described high pressure side path 4b along described adjusting screw 28.
Therefore, the described valve body 7 of the heating power expansion valve 20 ' in the mode of execution 3 has described high pressure side path 4b and the described valve opening 8 that the low voltage side path 4a that refrigerant is flowed out is connected, and regulates control by the cold medium flux of this valve opening 8 by described spherical spool 21.
The adjusting of this cold medium flux (being flow control) is by being driven the underdrive bar 15g that will described spherical spool 21 moves to valve opening position by described temperature-sensitive drive portion 17 and described spherical spool 21 being implemented to the described compression helical spring that closes the driving of valve direction.
And, heating power expansion valve 20 ' in the present embodiment, even because of the pressure oscillation of described high pressure refrigerant and the vibration of the described spherical spool 21 of flow change causing, and then when causing the vibration of described valve core frame 22 owing to the vibration of described spherical spool 21, described valve core frame 22 is as the constraint means of the described compression helical spring 25 of constraint and the generation effect time, the described inwall 28c of the described cylindric guide portion 28b of described adjusting screw 28 also can be used as the guiding means of described compression helical spring 26 and makes described spherical spool 21 correct moving.And then, can avoid the unsettled phenomenon of described compression helical spring 25 actions crooked or that distortion causes occurring because of described compression helical spring 25.Therefore, can prevent because of the unstable different sound that causes of described compression helical spring 25 actions, in addition, by described spherical spool 21 also can be correct the control cold medium flux.
And, except that described valve core frame 22 and described adjusting screw 28, described heating power expansion valve 20 ' does not increase other new parts, therefore, assembling work is comparatively simple, and, by described valve core frame 22 and described adjusting screw 28, also can realize retraining a kind of heating power expansion valve 20 ' of described compression helical spring 25.Moreover described adjusting screw 28 also can be made by resin material.
In addition, the O shape circle of the symbol 29 among Fig. 4 of mode of execution 3 for sealing, described O shape circle 29 is arranged between the described cylinder guide portion 28b and described valve body 7 of described adjusting screw 28; Symbol 28d is the frock patchhole that is formed on the described round plate 28a.
Fig. 5 is the main position sectional view of embodiment of the present invention 4 heating power expansion valves.
Heating power expansion valve 20 ' unique difference of the heating power expansion valve of mode of execution 4 and Fig. 4 mode of execution 3 is structures of valve core frame among Fig. 5, and other structures are basic identical.Therefore, the part that Fig. 5 is identical with Fig. 4 is represented with prosign, saves detailed description.
Symbol 31 among Fig. 5 is a valve core frame, and this valve core frame 31 is identical with the described valve core frame 22 ' of Fig. 3 mode of execution 2.That is, described valve core frame 31 with described spherical spool 21 contacted surface of contact on be formed with the cylindrical wall portion 34 of vertical setting.The following end in contact of described spherical spool 21 is configured in the annulus portion 35 that the top of described cylindrical wall portion 34 is provided with, and its contact segment fix by spot welding, and its spot welding position usefulness symbol 27 ' is represented.
In addition, by spot welding the upper end of described spherical spool 21 and the lower end of described underdrive bar 15g are fixed.Its welding part is represented with symbol 26 '.
Moreover described valve core frame 31 is at the formed slightly cylindrical protuberance 32 of reverse side of the side that contacts with described spherical spool 21, and this protuberance 32 forms as one with described wall cylindraceous portion 34.And, being provided with blade of a sword portion 33 between described slightly cylindrical protuberance 32 and the described wall cylindraceous portion 34, described blade of a sword portion 33 and described protuberance 32 and described wall portion 34 connect as one.
Described protuberance 32 is inserted in the described compression helical spring 25 by being pressed into, and described blade of a sword portion 33 is supported in the upper end of described compression helical spring 25; The lower end of described compression helical spring 25 is supported by the described round plate 28a of described adjusting screw 28.Therefore, described compression helical spring 25 is configured on the described adjusting screw 28 and along the described inwall 28c start of described adjusting screw 28.
Thereby the described compression helical spring 25 of fixing described valve core frame 31 is arranged between described valve core frame 31 and the described adjusting screw 28.
Because the whole integrated action relationships that the described underdrive bar 15g of mode of execution 4 and described spherical spool 21 and described valve core frame 31 are constituted, so, can further improve described valve core frame 31 when as constraint means described compression helical spring 25 being retrained, the described inwall 28c that also can improve described adjusting screw 28 leads to described compression helical spring 25 (being the external diameter of described compression helical spring 25) as the guiding means.Promptly because described compression helical spring 25 is subjected to the constraint (restriction) of described valve core frame 31, and the integral body that described underdrive bar 15g and described spherical spool 21 and described valve core frame 31 are constituted has integrated action relationships, therefore, when can suppressing described compression helical spring 25 generation bendings or distortion, described compression helical spring 25 self is because the guide portion action that also can be constituted along the described inwall 28c of described adjusting screw 28, therefore, can avoid described compression helical spring 25 crooked or distortions, realize correct operating stably.Described compression helical spring 25 can make described spherical spool 21 and described valve core frame 31 correct to closing the action that the valve direction moves, thereby a kind of heating power expansion valve 20 ' that can realize correctly that cold medium flux is regulated can be provided.
So the mode of execution 4 also heating power expansion valve 20 ' with described mode of execution 3 is the same, can realize flow adjustment (being flow control) by described spherical spool 21.
Moreover, the described underdrive bar 15g of the heating power expansion valve 20 ' shown in the mode of execution 3 of heating power expansion valve of the present invention and described spherical spool 21 and described valve core frame 22, as implement shown in mode 2 and the mode of execution 4, by spot welding, the three is interfixed form described welding part 26 ' and welding part 27 '.
In addition, Fig. 6 is the valve core frame of embodiment of the present invention 5 and the tectonic maps of compression helical spring.
The formation of the formation of Fig. 6 heating power expansion valve and mode of execution 1 heating power expansion valve is basic identical.Therefore, the part identical with Fig. 1 represented with prosign, saves detailed description.Next the feature that is primarily aimed at mode of execution 5 heating power expansion valves 20 is that valve core frame and compression helical spring partly are elaborated.Symbol 31 ' in the mode of execution 5 is a valve core frame, and this valve core frame 31 ' is identical with the described valve core frame 22 ' of Fig. 3 mode of execution 2.That is, described valve core frame 31 ' is made of the cylindrical wall portion 34 ' one that vertically is provided with on the described spherical spool 21 contacted surface of contact.The annulus portion 35 ' that the top of described cylindrical wall portion 34 ' is provided with contacts with the lower end of described spherical spool 21, further by for example spot welding is welded in its surface of contact enforcement, and makes described annulus portion 35 ' be fixed on the lower end of described spherical spool 21.In addition, its welding part " is represented with symbol 27.And, the slightly cylindrical protuberance 36 that described valve core frame 31 ' is formed with on the reverse end face of the end face of the described valve core frame 31 ' that fixes with described spherical spool 21.In addition, be provided with blade of a sword portion 37 between described slightly cylindrical protuberance 36 and the described wall cylindraceous portion 34 ', described blade of a sword portion 37 is linked to each other with described wall cylindraceous portion 34 ' by described protuberance 36 and forms.Moreover, symbol 38 is the compression helical spring of tower shape for shape, the described protuberance 36 of described valve core frame 31 ' is by being pressed into the thin footpath tip side 381 that is embedded in described tower shape compression helical spring 38, the described blade of a sword of described tip side 381 supports portion 37, and the particle size side 382 of described compression helical spring 38 is to be supported by described adjusting screw 12.
In addition, described compression helical spring 38, described valve core frame 31 ' are for example formed by stainless steel.D and the D1 with above-mentioned is identical respectively for the diameter of the diameter of described tower shape compression helical spring 38 thin footpath tip side 381 and the protuberance 36 of described valve core frame 31 '.
Moreover described tower shape compression helical spring 38 is configured between described valve core frame 31 ' and the described adjusting screw 12, and described valve core frame 31 ' is fixed in the described compression helical spring 38 by being pressed into.
Thereby the described relatively tower shape of described valve core frame 31 ' compression helical spring 38 can be used as constraint means and acts on.That is, described compression helical spring 38 is subjected to described valve core frame 31 ' constraint, thereby forms the restricted structure of start of described compression helical spring 38.And then, can suppress described compression helical spring 38 and bend or twist, the elastic force of described compression helical spring 38 can be correct acts on described spherical spool 21.Therefore, even the pressure oscillation of described high pressure refrigerant or the situations such as change of cold medium flux have occurred, crooked or the distortion of described compression helical spring 38 also can be suppressed, thereby the action wild effect of described compression helical spring 38 also can be avoided, so just can implement correct pretightening force to described spherical spool 21, and then, can prevent the different sound or the incorrect cold medium flux control phenomenon that cause because of vibration.
Moreover, described underdrive bar 15g in the described mode of execution 5, described spherical spool 21 and described valve core frame 31 ' form as a whole by welding (for example spot welding) each other, the whole start relation of the heating power expansion valve 20 that constitutes by welding, also can avoid the unsettled phenomenon of action of described compression helical spring 38, and then also can prevent the generation of described different sound and then cause the generation of noise, and, by the correct switch valve action of described spherical spool 21, also can realize correctly controlling a kind of heating power expansion valve 20 of cold medium flux.
Claims (16)
1. a heating power expansion valve comprises valve body; The refrigerant that this valve body has the valve chamber that flows into by the high pressure side path for the high pressure refrigerant and a described valve chamber changes the low voltage side path that low pressure refrigerant flows out into after by valve opening;
Also comprise the spherical spool that is arranged on described valve opening upstream side, the temperature-sensitive drive portion that drives drive link; Described drive link moves the spool that described valve body upper end is provided with to valve opening position;
And be configured in the described valve chamber and with described spool to closing the compression helical spring that the valve direction promotes;
Be arranged on the bottom of described valve body and be used for regulating the adjusting screw of described compression helical spring pretightening force;
Regulate the cold medium flux of the described valve opening of flowing through by described spool;
It is characterized in that when the valve core frame that supports described spool was arranged between described spool and the described compression helical spring, described valve core frame was fixed on the described compression helical spring.
2. heating power expansion valve as claimed in claim 1 is characterized in that, described valve core frame fixedly realizing by described valve core frame is pressed in the described compression helical spring on described compression helical spring.
3. heating power expansion valve as claimed in claim 2, it is characterized in that, aforementioned this valve core frame is pressed in the described compression helical spring is to be embedded in the described compression helical spring by the protuberance that will be provided with on this valve core frame to realize, described protuberance is integrally formed in the reverse side of the side that contacts with spherical spool on the described valve core frame.
4. heating power expansion valve as claimed in claim 3 is characterized in that, described valve core frame has the blade of a sword portion that connects as one with described protuberance.
5. heating power expansion valve as claimed in claim 4 is characterized in that, described blade of a sword portion is supported by an end of described compression helical spring, and the other end of described compression helical spring is supported by described adjusting screw.
6. as each described heating power expansion valve of claim 1 to 5, it is characterized in that described drive link passes described valve opening and contacts with described spherical spool, and described spherical spool contacts with described valve core frame, described each contact position is fixed by spot welding.
7. heating power expansion valve as claimed in claim 6 is characterized in that, contacting of described spherical spool and described valve core frame is that cylindrical wall portion by described spherical spool is configured on the described valve core frame implements.
8. heating power expansion valve as claimed in claim 1 is characterized in that, described adjusting screw by round plate and the cylindric guide portion that vertically is arranged on the round plate constitute, described compression helical spring is along the inwall setting of described cylindric guide portion.
9. the described heating power expansion valve of claim 8, it is characterized in that an end of described compression helical spring supports the blade of a sword portion that is provided with on the described valve core frame, and, the other end of described compression helical spring supports by round plate, and described compression helical spring drives described spherical spool.
10. heating power expansion valve as claimed in claim 9, it is characterized in that, described valve core frame has the cylindrical wall portion that connects as one with described blade of a sword portion, simultaneously, described valve core frame is formed with slightly cylindrical protuberance on the opposite direction of described cylindrical wall portion, described slightly cylindrical protuberance connects as one with described cylindrical wall portion in the middle of with described blade of a sword portion serving as, described spherical spool is arranged in the described cylindrical wall portion.
11. heating power expansion valve as claimed in claim 10, it is characterized in that, the lower end of described spherical spool is to be fixed in the cylindrical wall portion of described valve core frame by implementing spot welding, described protuberance is pressed in the described compression helical spring, so that described valve core frame is fixed, the upper end of described spherical spool is fixed on the lower end of described drive link by spot welding.
12. heating power expansion valve as claimed in claim 2, it is characterized in that, described compression helical spring forms the tower shape, simultaneously, described being pressed into is that thin footpath tip side by the protuberance that will be provided with on the described valve core frame is embedded in described compression helical spring is implemented, and the particle size side of described compression helical spring is supported by described adjusting screw.
13. heating power expansion valve as claimed in claim 12 is characterized in that, described valve core frame has the blade of a sword portion that links to each other with described protuberance and form as one.
14. heating power expansion valve as claimed in claim 13 is characterized in that, the described thin footpath tip side of described compression helical spring supports described blade of a sword portion, and simultaneously, the particle size side of described compression helical spring is supported by described adjusting screw.
15., it is characterized in that the protuberance of described valve core frame is integrally formed in the reverse side of the side that contacts with described spherical spool of described valve core frame as claim 13 or 14 described heating power expansion valves.
16. heating power expansion valve as claimed in claim 15 is characterized in that, described spherical spool and described valve core frame contact be by described spherical spool is arranged on the described valve core frame realize in the cylindrical wall portion that vertically is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910076335A CN101776176A (en) | 2009-01-13 | 2009-01-13 | Thermal power expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910076335A CN101776176A (en) | 2009-01-13 | 2009-01-13 | Thermal power expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101776176A true CN101776176A (en) | 2010-07-14 |
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ID=42512716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910076335A Pending CN101776176A (en) | 2009-01-13 | 2009-01-13 | Thermal power expansion valve |
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| Country | Link |
|---|---|
| CN (1) | CN101776176A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966426A (en) * | 2018-09-30 | 2020-04-07 | 浙江三花汽车零部件有限公司 | Expansion valve |
| CN111649168A (en) * | 2020-06-16 | 2020-09-11 | 李羽翠 | Gas micro flow controller and supply device |
| CN113728185A (en) * | 2019-06-28 | 2021-11-30 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
-
2009
- 2009-01-13 CN CN200910076335A patent/CN101776176A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966426A (en) * | 2018-09-30 | 2020-04-07 | 浙江三花汽车零部件有限公司 | Expansion valve |
| CN110966426B (en) * | 2018-09-30 | 2022-08-26 | 浙江三花汽车零部件有限公司 | Expansion valve |
| CN113728185A (en) * | 2019-06-28 | 2021-11-30 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN113728185B (en) * | 2019-06-28 | 2022-09-20 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN111649168A (en) * | 2020-06-16 | 2020-09-11 | 李羽翠 | Gas micro flow controller and supply device |
| CN111649168B (en) * | 2020-06-16 | 2022-05-06 | 李羽翠 | Gas micro flow controller and supply device |
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