CN102759232A - Thermostatic expansion valve - Google Patents
Thermostatic expansion valve Download PDFInfo
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- CN102759232A CN102759232A CN2011101068898A CN201110106889A CN102759232A CN 102759232 A CN102759232 A CN 102759232A CN 2011101068898 A CN2011101068898 A CN 2011101068898A CN 201110106889 A CN201110106889 A CN 201110106889A CN 102759232 A CN102759232 A CN 102759232A
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Abstract
The invention discloses a thermostatic expansion valve comprising a valve body (1) and a valve core component (2); the valve body (1) is provided with a first interface cavity (11), the valve body (1) is connected with a gas tank (3), and the gas tank (3) is provided with a lower cavity (35) and a transmission component (21) arranged in the lower cavity (35); the thermostatic expansion valve further comprises a first sealing component used for isolating the first interface cavity (11) from the lower cavity (35); and the first sealing component comprises a first flexible sealing element capable of shrinking with the movement of the valve core component (2), the first flexible sealing element is arranged between the transmission component (21) and the upper end part of the valve core component (2), and the first edge part (41) of the first flexible sealing element is hermetically connected on the valve body (1). The structure design of the thermostatic expansion valve can improve the sealing reliability between the valve body and the upper end part of the valve core component and improve the valve sensitivity on the one hand, and can reduce processing difficulty of the valve body and the valve core component on the other hand. Besides, the invention further discloses a thermostatic expansion valve with another structure form.
Description
Technical field
The present invention relates to refrigerant fluid control component technical field, particularly a kind of heating power expansion valve.In addition, the invention still further relates to the heating power expansion valve of another kind of version.
Background technology
Heating power expansion valve is a vitals of forming refrigeration system, is to remove another basic element of character outside evaporimeter, compressor and the condenser in four basic elements of character of refrigeration system.The main effect of heating power expansion valve is to suck the aperture size that the degree of superheat of holding is come control valve through evaporator outlet end or compressor in the induction refrigeration system, thereby the system of realization cold medium flux is regulated and the purpose of throttling step-down.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of typical heating power expansion valve in the prior art.
This heating power expansion valve comprise valve body 1 ', valve body 1 ' the upper end be connected with the gas tank that comprises gas tank seat 2 ' 4 gentle case lids 2 ' 5, the inner chamber of this gas tank is divided into epicoele 2 ' 2 and cavity of resorption 2 ' 3 by diaphragm 2 ' 1; As shown in Figure 1, epicoele 2 ' 2 has refrigerant and is connected with bulb 4 ' 2 through capillary 4 ' 1 through being full of, and bulb 4 ' 2 is used to experience the degree of superheat of the refrigerant of evaporator outlet end or suction port of compressor end, and in epicoele temperature, pressure P of generation
bSimultaneously, cavity of resorption 2 ' 3 is communicated with said evaporator outlet end through the balance pipe (not shown), thereby in cavity of resorption 2 ' 3, produces an evaporating pressure P
o
In addition, as shown in Figure 1, valve body 1 ' inner chamber in be formed with valve 1 ' 1, this valve 1 ' 1 is combined with spool 3 ' 1, the upper end of spool 3 ' 1 is connected with drive link 3 ' 2, this drive link 3 ' 2 be connected with the driver blade 3 ' 3 that is positioned at cavity of resorption; Need to prove that in this prior art, spool 3 ' 1, drive link 3 ' 2 and SDeflector hereinafter described 3 ' 4 close and be called valve hole part, thereby valve hole part is a kind of minute body component in this prior art; The outer cover of spool 3 ' 1 be equipped with guide ring 7 ', this guide ring 7 ' following cavity is a counter balance pocket 1 ' 4, be provided with in the counter balance pocket 1 ' 4 spring 6 that supports spool 3 ' 1 ', this spring 6 ' give spool 3 ' 1 one elastic force P that makes progress
t
As the force analysis object, spool 3 ' 1 receives an elastic force P who makes progress with drive link 3 ' 2 with spool 3 ' 1 and drive link 3 ' 2
t, can receive the downward thrust that driver blade 3 ' 3 gives simultaneously, this thrust promotes driver blades 3 ' 3 by diaphragm 2 ' 1 and forms, thereby this thrust that is make power that diaphragm 2 ' 1 moves downward that is P
b-P
oWhen spool 3 ' 1 is in poised state, P
b-P
o=P
t, that is P
b=P
o+ P
t, when the temperature of evaporator outlet end is too high, P
bIncrease, move downward thereby promote spool 3 ' 1, thus the flow of increase refrigerant; When the temperature of evaporator outlet end is crossed when low P
bReduce, thereby promotion spool 3 ' 1 moves upward, thereby reduce the flow of refrigerant.
Yet as shown in Figure 1, in practical work process, spool 3 ' 1 receives the said temperature pressure P except meeting
b, evaporating pressure P
oWith spring force P
tOutside, the pressure that in making of can receiving also that refrigerant in first hub cavity 1 ' 2 the produces pressure that spool 3 ' 1 opens and second hub cavity 1 ' 3 spool 3 ' 1 is closed, the difference of these two pressure produces system's pressure reduction; For low capacity valve or low pressure refrigeration system; The influence to spool 3 ' 1 of this system's pressure reduction can be ignored basically; But for big capacity valve or high pressure refrigeration system; The influence to spool 3 ' 1 of this system's pressure reduction is very big, thereby is having a strong impact on the degree of regulation of spool 3 ' 1.
In view of this; As shown in Figure 1; Spool 3 ' 1 is offered through hole 3 ' 11 and is communicated with first hub cavity 1 ' 2 and counter balance pocket 1 ' 4, and the lower end of this through hole 3 ' 11 is combined with SDeflector 3 ' 4, has the gap between this SDeflector 3 ' 4 and the through hole 3 ' 11; Thereby make the pressure of two chambers equate; The lifting surface area of the first pressure-bearing surface S ' 1 in the second pressure-bearing surface S ' 2 and the counter balance pocket 1 ' 4 in the hub cavity 1 ' 2 of winning is equated, because the first pressure-bearing surface S ' 1 and the second pressure-bearing surface S's ' 2 is stressed in the opposite direction, thereby the refrigerant in first hub cavity 1 ' 2 is cancelled out each other to the pressure of spool 3 ' 1 generations; As shown in Figure 2; Be provided with stressed the 3rd pressure-bearing surface S ' 3 in the opposite direction and the 4th pressure-bearing surface S ' 4 in second hub cavity 1 ' 3; Because the lifting surface area of these two pressure-bearing surfaces equates, thereby the refrigerant in second hub cavity 1 ' 3 is cancelled out each other to the pressure that spool 3 ' 1 produces.Thereby no matter refrigerant flows to second hub cavity 1 ' 3 by first hub cavity 1 ' 2, still flows to first hub cavity 1 ' 2 by second hub cavity 1 ' 3, and system's pressure reduction is zero basically, thereby heating power expansion valve can be realized bidirectional balanced flowing.
Yet, as shown in Figure 1 in above-mentioned prior art, the upper end of drive link 3 ' 2 and valve body 1 ' between be provided with first seal member 8 ' 1, be used to isolate first hub cavity 1 ' 2 and cavity of resorption 2 ' 3; Spool 3 ' 1 and guide ring 7 ' between be provided with second seal member 8 ' 2, be used to isolate second hub cavity 1 ' 3 and counter balance pocket 1 ' 4; Drive link 3 ' 2 moves with spool 3 ' 1 vertically, thereby above-mentioned two kinds of sealings are transmission seal, has following defective:
The first, the sealing property of transmission seal is unreliable, and along with the prolongation of service time, wearing out of rubber leaked and can be strengthened, and then can make the degree of superheat of heating power expansion valve strengthen, and influences the reliability and the accuracy of heating power expansion valve work;
The second, the frictional resistance of transmission seal is big, and along with the prolongation of service time, rubber aging, and frictional resistance may further strengthen, thereby influences the sensitivity of heating power expansion valve;
The 3rd, valve body 1 ' and drive link 3 ' 2 between and spool 3 ' 1 and guide ring 7 ' between quality of fit require height, valve body 1 ', drive link 3 ' 2, spool 3 ' 1 and guide ring 7 ' difficulty of processing big; If valve body 1 ' and drive link 3 ' 2 between and spool 3 ' 1 and guide ring 7 ' between be not to adopt seal to seal, but adopt high-precision fitted seal, then valve body 1 ', drive link 3 ' 2, spool 3 ' 1 and guide ring 7 ' difficulty of processing can be bigger.
Summary of the invention
The technical problem that the present invention will solve is for providing a kind of heating power expansion valve, and the structural design of this heating power expansion valve can improve the reliability that seals between valve body and the valve hole part upper end on the one hand, and improves the sensitivity of valve; Can reduce the difficulty of processing of valve body and valve hole part on the other hand.
For solving the problems of the technologies described above, the present invention provides a kind of heating power expansion valve, comprises valve body and the valve hole part that is slidingly matched with said valve body; Said valve body is provided with first hub cavity, and said valve body is connected with gas tank, and said gas tank is provided with cavity of resorption and is located at the drive disk assembly in the said cavity of resorption; Said heating power expansion valve also comprises first seal member of isolating said first hub cavity and said cavity of resorption; Said first seal member comprises first flexible seals that can stretch with the motion of said valve hole part; Said first flexible seals is located between the upper end of said drive disk assembly and said valve hole part, and its first edge part is sealedly attached on the said valve body.
Preferably, the first said flexible seals is first bellows; Said first bellows comprises that the first ripple sleeve part that can stretch vertically reaches from the first straight section portion of this first ripple sleeve part of end sealing; The upper end of said valve hole part is stretched in the said first ripple sleeve part, and the medial surface of its upper surface and the said first straight section portion is fitted.
Preferably, the transmission nail that said drive disk assembly comprises driver blade and is connected with said driver blade, the said first straight section portion is located between the upper end of said transmission nail and said valve hole part, and the diapire of the lateral surface of the said first straight section portion and said transmission nail is fitted.
Preferably, the top ends of said valve body is provided with the installing hole that said first bellows is installed, and this installing hole is interior through the nut that has been threaded; Said nut is loaded on the outside of the said first ripple sleeve part and said transmission nail through its inner hole sleeve, and said first edge part is pressed on the diapire of said installing hole; Be tightly connected between the diapire of said first edge part and said installing hole.
Preferably, the circumferential ends of said first edge part further is provided with first flange, and the bottom of said installing hole sidewall is provided with and the said first flange position groove opposite; Said first flange stretches in the said groove, and is stuck on the lateral wall of said nut.
Preferably, the said first edge part seal weld is connected on the diapire of said installing hole, is provided with first seal between the diapire of perhaps said first edge part and said installing hole.
On the basis of existing technology; First seal member of heating power expansion valve provided by the present invention comprises first flexible seals that can stretch with the motion of said valve hole part; Said first flexible seals is located between the upper end of said drive disk assembly and said valve hole part, and its first edge part is sealedly attached on the said valve body.
Along with valve hole part moves vertically, first flexible seals is also flexible along with in the axial direction, and its first edge part is sealedly attached on the valve body, thereby this first flexible seals is isolated said cavity of resorption and said first hub cavity all the time; And particularly, the sealing means between first edge part and the valve body can connect or adopt static seal structures such as seal sealing for seal weld.With respect to transmission seal of the prior art; Sealing among the present invention between first edge part and the valve body is a static seal structure; The reliability of sealing is high; The probability that leaks is lower, thereby can not strengthen the degree of superheat of heating power expansion valve, thereby has significantly improved the reliability and the accuracy of heating power expansion valve work.In addition, in the present invention, hermetically-sealed construction is present between first edge part and the valve body, rather than between valve hole part and the valve body, thereby valve hole part can not receive the influence of frictional resistance, thereby the sensitivity of valve is higher in the process of motion vertically.Moreover, in the present invention, be static seal structure between first edge part and the valve body, rather than adopt transmission seal structure of the prior art, thereby the requirement on machining accuracy of valve body and valve hole part is not high, can significantly reduce its difficulty of processing.
In sum, heating power expansion valve provided by the present invention can improve the reliability that seals between valve body and the valve hole part upper end on the one hand, and improves the sensitivity of valve; Can reduce the difficulty of processing of valve body and valve hole part on the other hand.
In addition, another technical problem that will solve of the present invention is the heating power expansion valve that another kind of version is provided, and the structural design of this heating power expansion valve can improve the reliability of isolating seal between the counter balance pocket and second hub cavity on the one hand, and the sensitivity that improves valve; Can reduce the difficulty of processing of valve hole part on the other hand.
For solving the problems of the technologies described above, the present invention provides a kind of heating power expansion valve, comprises valve body and the valve hole part that is slidingly matched with said valve body; Said valve body is provided with second hub cavity and is built-in with the counter balance pocket of elastomeric element, and said heating power expansion valve also comprises second seal member of isolating the two; Said second seal member comprises second flexible seals that can stretch with the motion of said valve hole part; Said second flexible seals is located between the bottom of said elastomeric element and said valve hole part, and its second edge part is sealedly attached on the said valve body.
Preferably, said second flexible seals is second bellows, and said second bellows comprises second ripple sleeve part that can stretch vertically and second closure of at one end sealing this second ripple sleeve part; Said elastomeric element comprises spring base, and said second closure is held between the bottom of said spring base and said valve hole part.
Preferably, the lower end of said valve body is combined with regulates seat, and said valve body is provided with interior step surface, said second edge part be held on the said roof of regulating seat with said between the step surface, and said second edge part and said interior step surface are tightly connected.
Preferably; Further arrange vertically between the roof of said adjusting seat and the said interior step surface and be provided with first pad and second pad, said interior step surface comprises the first interior step surface that said first pad is set and step surface in said second pad second is set; Said second edge part further is held between said first pad and said second pad, and step surface is tightly connected in said second edge part and said first.
Preferably, the circumferential ends of said second edge part further is provided with second flange that is stuck on the said first pad lateral wall.
Preferably, said second closure is the second straight section portion, and this second straight section portion seals the said second ripple sleeve part in the bottom; The bottom of said valve hole part is stretched into the said second ripple sleeve part from the top, and its lower surface is the plane, and fits with the medial surface of stating the first straight section portion; The lateral surface of the said second straight section portion and the roof of said spring base are fitted.
Preferably, said first pad is located at the outside of the said second ripple sleeve part with its endoporus; The inner end of said second pad radially exceeds the inner end of said first pad to the inside, and fits with the inner end of said second edge part.
Preferably, said second closure is second depressed part, and this second depressed part is at the said second ripple sleeve part of top closure, and the lower surface of said valve hole part is the sphere that cooperates with the outer concave surface of said second depressed part; Said spring base is provided with protuberance vertically, and this protuberance stretches into the said second ripple sleeve part from the bottom, and the medial surface of its roof and said second depressed part is fitted.
Preferably, said second pad is located at the outside of the said second ripple sleeve part with its endoporus; The inner end of said first pad radially exceeds the inner end of said second pad to the inside, and fits with the inner end of said second edge part.
On the basis of existing technology; Second seal member of heating power expansion valve provided by the present invention comprises second flexible seals that can stretch with the motion of said valve hole part; Said second flexible seals is located between the bottom of said elastomeric element and said valve hole part, and its second edge part is sealedly attached on the said valve body.
Along with valve hole part moves vertically, second flexible seals is also flexible along with in the axial direction, and its second edge part is sealedly attached on the valve body, thereby this second flexible seals is isolated said counter balance pocket and said second hub cavity all the time; And particularly, the sealing means between second edge part and the valve body can connect or adopt static seal structures such as seal sealing for seal weld.With respect to transmission seal of the prior art; Sealing among the present invention between second edge part and the valve body is a static seal structure; The reliability of sealing is high; The probability that leaks is lower, thereby can not strengthen the degree of superheat of heating power expansion valve, thereby has significantly improved the reliability and the accuracy of heating power expansion valve work.In addition, in the present invention, hermetically-sealed construction is present between second edge part and the valve body, rather than between valve hole part and the guide ring, thereby valve hole part can not receive the influence of frictional resistance, thereby the sensitivity of valve is higher in the process of motion vertically.Moreover, in the present invention, be static seal structure between second edge part and the valve body, rather than adopt transmission seal structure of the prior art, thereby the requirement on machining accuracy of valve hole part is not high, can significantly reduce its difficulty of processing.
In sum, heating power expansion valve provided by the present invention can improve the reliability of isolating seal between the counter balance pocket and second hub cavity on the one hand, and the sensitivity that improves valve; Can reduce the difficulty of processing of valve hole part on the other hand.
Description of drawings
Fig. 1 is the structural representation of a kind of typical heating power expansion valve in the prior art;
Fig. 2 is the structural representation of a kind of specific embodiment of heating power expansion valve provided by the present invention;
Fig. 3 is the enlarged drawing at A position among Fig. 2;
Fig. 4 is the structural representation of first bellows among Fig. 2 and Fig. 3;
Fig. 5 is the structural representation of first kind of specific embodiment of another kind of heating power expansion valve provided by the present invention;
Fig. 6 is the enlarged drawing at B position among Fig. 5;
Fig. 7 is the structural representation of second bellows among Fig. 5 and Fig. 6;
Fig. 8 is the structural representation of second kind of specific embodiment of another kind of heating power expansion valve provided by the present invention;
Fig. 9 is the enlarged drawing at C position among Fig. 8;
Figure 10 is the structural representation of second bellows among Fig. 8 and Fig. 9.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 1:
1 ' valve body; 1 ' 1 valve port; 1 ' 2 first hub cavity; 1 ' 3 second hub cavity; 1 ' 4 counter balance pocket;
2 ' 1 diaphragms; 2 ' 2 epicoeles; 2 ' 3 cavity of resorptions; 2 ' 4 gas tank seats; 2 ' 5 gas tanks lid;
3 ' 1 spools; 3 ' 11 through holes; 3 ' 2 drive links; 3 ' 3 driver blades; 3 ' 4 SDeflectors;
S ' 1 first pressure-bearing surface; S ' 2 second pressure-bearing surfaces; S ' 3 the 3rd pressure-bearing surface; S ' 4 the 4th pressure-bearing surface;
4 ' 1 capillaries; 4 ' 2 bulb; 6 ' spring; 7 ' guide ring;
8 ' 1 first seal members; 8 ' 2 second seal members.
Corresponding relation among Fig. 2 to Figure 10 between Reference numeral and the component names is:
1 valve body; 11 first hub cavity; 12 second hub cavity; 13 counter balance pocket; 14 installing holes; 141 grooves; 15 nuts; Step surface in 16 first; Step surface in 17 second; 18 valve ports;
2 valve parts; 21 drive disk assemblies; 211 driver blades; 212 transmissions nail; 22 elastomeric elements; 221 spring bases; The 221a protuberance; 222 springs;
3 gas tanks; 31 gas tank seats; 32 gas tanks lid; 33 diaphragms; 34 epicoeles; 35 cavity of resorptions;
4 first bellowss; 41 first edge parts; 42 first ripple sleeve parts; 43 first straight section portions; 44 first flange; 45 first seals;
5 second bellowss; 51 second edge parts; 52 second ripple sleeve parts; 531 second straight section portions; 532 second depressed parts; 54 second flange; 55 second seals;
6 regulate seat; 61 first pads; 62 second pads.
The specific embodiment
Core of the present invention is for providing a kind of heating power expansion valve, and the structural design of this heating power expansion valve can improve the reliability that seals between valve body and the valve hole part upper end on the one hand, and improves the sensitivity of valve; Can reduce the difficulty of processing of valve body and valve hole part on the other hand.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 2, Fig. 3 and shown in Figure 4, Fig. 2 is the structural representation of a kind of specific embodiment of heating power expansion valve provided by the present invention; Fig. 3 is the enlarged drawing at A position among Fig. 2; Fig. 4 is the structural representation of first bellows among Fig. 2 and Fig. 3.
In one embodiment, as shown in Figure 2, heating power expansion valve provided by the present invention comprises valve body 1 and the valve hole part 2 that is slidingly matched with valve body 1, during valve hole part 2 sealing valve ports 18, the inner chamber of valve body is divided into first hub cavity 11 and second hub cavity 12; Valve body 1 is connected with gas tank 3, and gas tank comprises gas tank seat 31, gas tank lid 32 and the inner chamber of gas tank is divided into the diaphragm 33 of epicoele 34 and cavity of resorption 35, further is provided with drive disk assembly 21 in the gas tank 3; Said heating power expansion valve also comprises first seal member of isolating first hub cavity 11 and cavity of resorption 35.
As shown in Figure 2; On the basis of above-mentioned prior art; First seal member further comprises first flexible seals that can stretch with valve hole part 2 motion; Said first flexible seals is located between the upper end of drive disk assembly 21 and valve hole part 2, and its first edge part 41 is sealedly attached on the valve body 1.
Along with valve hole part 2 moves vertically, first flexible seals is also flexible along with in the axial direction, and its first edge part 41 is sealedly attached on the valve body 1, thereby this first flexible seals is all the time with cavity of resorption 35 and 11 isolation of first hub cavity; And particularly, the sealing means between first edge part 41 and the valve body 1 can connect or adopt static seal structures such as seal sealing for seal weld.With respect to transmission seal structure of the prior art; Sealing among the present invention between first edge part 41 and the valve body 1 is a static seal structure; The reliability of sealing is high; The probability that leaks is lower, thereby can not strengthen the degree of superheat of heating power expansion valve, thereby has significantly improved the reliability and the accuracy of heating power expansion valve work.In addition, in the present invention, hermetically-sealed construction is present between first edge part 41 and the valve body 1, rather than between valve hole part 2 and the valve body 1, thereby valve hole part 2 can not receive the influence of frictional resistance, thereby the sensitivity of valve is higher in the process of motion vertically.Moreover, in the present invention, be static seal structure between first edge part 41 and the valve body 1, rather than adopt transmission seal structure of the prior art, thereby the requirement on machining accuracy of valve body 1 and valve hole part 2 is not high, can significantly reduce its difficulty of processing.
Be appreciated that; First flexible seal arrangement provided by the present invention can be thought a kind of isolating seal layer structure; This isolating seal layer structure is held between the upper end of drive disk assembly 21 and valve hole part 2; And its edge part is sealedly attached on the valve body 1, makes itself and cavity of resorption 35 isolating seals of gas tank 3 thereby be similar to upper end parcel with valve hole part 2, and then makes win hub cavity 11 and cavity of resorption 35 isolating seals; Because the edge part of this isolating seal layer structure is sealedly attached on the valve body 1; With respect to valve body 1 is fixed; Thereby along with valve hole part 2 moves vertically; Need stretch vertically in the centre of this isolating seal layer structure (specifically can be the first ripple sleeve part 42 hereinafter), thereby all the time with the upper end and cavity of resorption 35 isolating seals of valve hole part 2.
Particularly; As shown in Figure 4; This first said flexible seals specifically can be first bellows 4, and this first bellows 4 comprises that the first ripple sleeve part 42 and the first straight section portion, 43, the first ripple sleeve parts 42 can stretch in the axial direction; The first straight section portion 43 on the top with the sealing of the first ripple sleeve part 42, make this first ripple sleeve part 42 opening down; On this basis, as shown in Figure 3, the upper end of valve hole part 2 is stretched in the first ripple sleeve part 42, and the medial surface of its upper surface and the first straight section portion 43 is fitted.In this structure, along with valve hole part 2 moves vertically, the first ripple sleeve part 42 extends in the axial direction or compresses, and flexible regular higher, thereby has higher functional reliability.In addition, owing to the medial surface of valve hole part 2 upper surfaces and the first straight section portion 43 is fitted, thereby more help the transmission of power.
In technique scheme; As shown in Figure 2; Drive disk assembly 21 comprises that driver blade 211 reaches transmission nail 212, the first straight section portions 43 that are connected with driver blade 211 and further is located between the upper end of transmission nail 212 and valve hole part 2, and the diapire of the lateral surface of the first straight section portion 43 and transmission nail 212 is fitted.Particularly; In order to make capable can effectively the transmission; And reduce the abnormal deformation of the first straight section portion 43; As shown in Figure 2, the contact area of the first straight section portion 43 and transmission nail 212 should be big as much as possible, makes the lateral surface of the straight section portion 43 that wins can be all or all cover transmissions substantially and follow closely 212 diapires.
In technique scheme, can also make concrete design to the fixed structure of first bellows 4.Such as, as shown in Figures 2 and 3, the top ends of valve body 1 is provided with installing hole 14, and this installing hole 14 is used to be provided with first bellows 4, and these installing hole 14 internal threads are connected with nut 15 simultaneously; Particularly, as shown in Figures 2 and 3, nut 15 is loaded on the outside of the first ripple sleeve part 42 and transmission nail 212 through its inner hole sleeve, and first edge part 41 is pressed on the diapire of installing hole 14; Be tightly connected between the diapire of first edge part 41 and installing hole 14.This kind fixed structure has been realized the fixed installation of first bellows 4 easily, and owing to be dismountable threaded engagement between nut 15 and the installing hole 14, thereby after first bellows 4 damages, can first bellows be changed in nut 15 dismountings.In addition, nut 15 is pressed on first edge part 41 on the diapire of installing hole 14 through necessarily obtaining moment of torsion, thereby can further improve the sealing property between the diapire of first edge part 41 and installing hole 14.
Further; In order to prevent that first bellows 4 from trembleing diametrically, as shown in Figure 4, the circumferential ends of first edge part 41 can further be provided with first flange 44; As shown in Figure 3; The bottom of installing hole 14 sidewalls is provided with first flange, 44 position groove opposite, 141, the first flange 44 and stretches in the groove 141, and is stuck on the lateral wall of nut 15.
Particularly, can also make design to the hermetically-sealed construction between the diapire of first edge part 41 and installing hole 14.Such as, first edge part 41 can be connected on the diapire of installing hole 14 in seal weld, perhaps can be provided with first seal 45 on the diapire of first edge part 41 and installing hole 14.
In addition, another core of the present invention is the heating power expansion valve that another kind of version is provided, and the structural design of this heating power expansion valve can improve the reliability of isolating seal between the counter balance pocket and second hub cavity on the one hand, and the sensitivity that improves valve; Can reduce the difficulty of processing of valve hole part on the other hand.
Please refer to Fig. 5, Fig. 6 and Fig. 7, Fig. 5 is the structural representation of first kind of specific embodiment of another kind of heating power expansion valve provided by the present invention; Fig. 6 is the enlarged drawing at B position among Fig. 5; Fig. 7 is the structural representation of second bellows among Fig. 5 and Fig. 6.
In the basic technology scheme, as shown in Figure 5, be provided with elastomeric element 22 in the counter balance pocket 13, this elastomeric element 22 comprises spring 222 and spring base 221, and heating power expansion valve also comprises second seal member of isolating the counter balance pocket 13 and second hub cavity 12; On this basis; Like Fig. 5 and shown in Figure 6; Said second seal member comprises second flexible seals that can stretch with valve hole part 2 motion, and said second flexible seals is located between the bottom of elastomeric element 22 and valve hole part 2, and its second edge part 51 is sealedly attached on the valve body 1.
Along with valve hole part 2 moves vertically, second flexible seals is also flexible along with in the axial direction, and its second edge part 51 is sealedly attached on the valve body 1, thereby this second flexible seals is all the time with counter balance pocket 13 and 12 isolation of second hub cavity; And particularly, the sealing means between second edge part 51 and the valve body 1 can connect or adopt static seal structures such as seal sealing for seal weld.With respect to transmission seal of the prior art; Sealing among the present invention between second edge part 51 and the valve body 1 is a static seal structure; The reliability of sealing is high; The probability that leaks is lower, thereby can not strengthen the degree of superheat of heating power expansion valve, thereby has significantly improved the reliability and the accuracy of heating power expansion valve work.In addition, in the present invention, hermetically-sealed construction is present between second edge part 51 and the valve body 1, rather than between valve hole part 2 and the guide ring, thereby valve hole part 2 can not receive the influence of frictional resistance, thereby the sensitivity of valve is higher in the process of motion vertically.Moreover, in the present invention, be static seal structure between second edge part 51 and the valve body 1, rather than adopt transmission seal structure of the prior art, thereby the requirement on machining accuracy of valve hole part 2 is not high, can significantly reduce its difficulty of processing.
Be appreciated that; Second flexible seal arrangement provided by the present invention can be thought a kind of isolating seal layer structure; This isolating seal layer structure is held between the bottom of spring base 221 and valve hole part 2; And its edge part is sealedly attached on the valve body 1, thereby the bottom parcel that this structure is similar to valve hole part 2 makes itself and counter balance pocket 13 isolating seals, and then makes second hub cavity 12 and counter balance pocket 13 isolating seals; Because the edge part of this isolating seal layer structure is sealedly attached on the valve body 1; With respect to valve body 1 is fixed; Thereby along with valve hole part 2 moves vertically; Need stretch vertically in the centre of this isolating seal layer structure (specifically can be the second ripple sleeve part 52 hereinafter), thereby all the time with the bottom and counter balance pocket 13 isolating seals of valve hole part 2.
In above-mentioned basic technology scheme, can make concrete design to the structure of second flexible seals.Such as, as shown in Figure 7, said second flexible seals is that second bellows, 5, the second bellowss 5 comprise second ripple sleeve part 52 that can stretch vertically and second closure of at one end sealing this second ripple sleeve part; On this basis, as shown in Figure 6, second closure is held between the bottom of spring base 221 and valve hole part 2.In this structure, along with valve hole part 2 moves vertically, the second ripple sleeve part 52 extends in the axial direction or compresses, and flexible regular higher, thereby has higher functional reliability.
Particularly, on the basis of technique scheme, make further improvement, can obtain first kind of embodiment.In this first kind of embodiment, as shown in Figure 7, said second closure is the second straight section portion 531, and this second straight section portion 531 seals the second ripple sleeve part, 52, the second ripple sleeve parts 52 in the bottom opening up; On this basis, as shown in Figure 6, the bottom of valve hole part 2 is stretched into the second ripple sleeve part 52 from the top, and its lower surface is the plane, and fits with the medial surface of the first straight section portion 531, thereby more helps the transmission of power; In addition, the roof of the lateral surface of the second straight section portion 531 and spring base 221 is fitted, and as shown in Figure 6 particularly, the top of spring base 221 is provided with cell body, and this second straight section portion 531 is located in this cell body; On this basis; In order to make capable more effectively transmission; And avoiding the second straight section portion 531 that abnormal deformation takes place, the second straight section portion 531 should maximize with the diapire contact area of cell body, makes the lateral surface of the second straight section portion 531 all or substantially all cover the diapires of cell body.
On the basis of last basic technology scheme; Can also make another kind of the improvement; Thereby obtain second kind of embodiment of the present invention, specifically see also Fig. 8, Fig. 9 and Figure 10, Fig. 8 is the structural representation of second kind of specific embodiment of another kind of heating power expansion valve provided by the present invention; Fig. 9 is the enlarged drawing at C position among Fig. 8; Figure 10 is the structural representation of second bellows among Fig. 8 and Fig. 9.
In this second kind of embodiment, shown in figure 10, said second closure is second depressed part 532, and this second depressed part 532 is at the said second ripple sleeve part 52 of top closure, and the opening of this second ripple sleeve part 52 down; On this basis, as shown in Figure 9, the lower surface of valve hole part 2 is the sphere that cooperates with the outer concave surface of second depressed part 532; And spring base 221 is provided with protuberance 221a vertically, and this protuberance 221a stretches into the second ripple sleeve part 52 from the bottom, and the medial surface of its roof and second depressed part 532 is fitted.Along with valve hole part 2 moves up and down vertically, the second ripple sleeve part 52 under the effect of protuberance 221a, elongation vertically or compression, obviously this kind structural design also can the technical solution problem, realizes goal of the invention.
Particularly, in above-mentioned two kinds of embodiment, can make concrete design to the fixed structure between second edge part 51 and the valve body 1.Such as, like Fig. 5 and shown in Figure 8, the lower end of valve body 1 is combined with regulates seat 6, and valve body 1 is provided with interior step surface, particularly, regulates seat 6 and is located in the internal thread hole of valve body 1 lower end through threaded engagement; On this basis, second edge part 51 is held between the roof and said interior step surface of regulating seat 6, and second edge part 51 is tightly connected with said interior step surface.This kind structural design has realized the fixing of second edge part 51 easily, and relatively simple for structure, and cost is lower.
Certainly, can also the said fixing structure make further improvement.Such as; Like Fig. 5, Fig. 6, Fig. 8 and shown in Figure 9; Further arrange vertically between the roof of adjusting seat 6 and the said interior step surface and be provided with first pad 61 and second pad 62; Step surface comprises that step surface 17, the first pads 61 are supported on the first interior step surface 16 in the first interior step surface 16 and second in said, and second pad 62 is supported on the second interior step surface 17; On this basis, second edge part 51 further is held between first pad 61 and second pad 62, and step surface 16 is tightly connected in second edge part 51 and first.The mode that this kind structural design grips through two pads is fixing with second edge part 51, the structure that is tightly connected between itself and the valve body 1 is damaged owing to receive the extruding of refrigerant thereby avoided second edge part 51.
In addition, tremble diametrically in order to prevent second bellows 5, like Fig. 6 and shown in Figure 9, the circumferential ends of second edge part 51 further is provided with second flange 55 that is stuck on first pad, 61 lateral walls.
As shown in Figure 6, in above-mentioned first kind of embodiment, first pad 61 is located at the outside of the second ripple sleeve part 52 with its endoporus; The inner end of second pad 62 radially exceeds the inner end of first pad 61 to the inside, and fits with the inner end of second edge part 51.This kind structural design makes second pad 62 all cover second edge parts 51 substantially, makes the flexible regularity that has more of the second ripple sleeve part 52, avoids the second ripple sleeve part 52 that moderate finite deformation takes place in telescopic process, and then improves the reliability of work.
As shown in Figure 9, in above-mentioned second kind of embodiment, second pad 62 is located at the outside of the second ripple sleeve part 52 with its endoporus; The inner end of first pad 61 radially exceeds the inner end of second pad 62 to the inside, and fits with the inner end of second edge part 51.The described technique effect of the technique effect of this kind structural design and epimere is basic identical, repeats no more at this.
At last; Need to prove that in the present invention, said first flexible seals and said second flexible seals are not limited to bellows structure; As long as other structural designs can form isolating seal layer mentioned above; And along with the axially-movable of valve hole part 2 is stretched, thereby with corresponding two cavity isolating seals, just all should be within protection scope of the present invention.
More than two kinds of heating power expansion valves provided by the present invention have been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (15)
1. a heating power expansion valve comprises valve body (1) and the valve hole part (2) that is slidingly matched with said valve body (1); Said valve body (1) is provided with first hub cavity (11), and said valve body (1) is connected with gas tank (3), and said gas tank (3) is provided with cavity of resorption (35) and is located at the drive disk assembly (21) in the said cavity of resorption (35); Said heating power expansion valve also comprises first seal member of isolating said first hub cavity (11) and said cavity of resorption (35); It is characterized in that; Said first seal member comprises first flexible seals that can stretch with said valve hole part (2) motion; Said first flexible seals is located between the upper end of said drive disk assembly (21) and said valve hole part (2), and its first edge part (41) is sealedly attached on the said valve body (1).
2. heating power expansion valve as claimed in claim 1 is characterized in that, the first said flexible seals is first bellows (4); Said first bellows (4) comprises that the first ripple sleeve part (42) that can stretch vertically reaches from the first straight section portion (43) of this first ripple sleeve part of end sealing; The upper end of said valve hole part (2) is stretched in the said first ripple sleeve part (42), and the medial surface of its upper surface and the said first straight section portion (43) is fitted.
3. heating power expansion valve as claimed in claim 2; It is characterized in that; The transmission nail (212) that said drive disk assembly (21) comprises driver blade (211) and is connected with said driver blade (211); The said first straight section portion (43) is located between the upper end of said transmission nail (212) and said valve hole part (2), and the diapire of the lateral surface of the said first straight section portion (43) and said transmission nail (212) is fitted.
4. heating power expansion valve as claimed in claim 3 is characterized in that, the top ends of said valve body (1) is provided with the installing hole (14) that said first bellows (4) is installed, and is connected with nut (15) through threaded engagement in this installing hole (14); Said nut (15) is loaded on the outside of the said first ripple sleeve part (42) and said transmission nail (212) through its inner hole sleeve, and said first edge part (41) is pressed on the diapire of said installing hole (14); Be tightly connected between the diapire of said first edge part (41) and said installing hole (14).
5. heating power expansion valve as claimed in claim 4; It is characterized in that; The circumferential ends of said first edge part (41) further is provided with first flange (44), and the bottom of said installing hole (14) sidewall is provided with and said first flange (44) position groove opposite (141); Said first flange (44) stretches in the said groove (141), and is stuck on the lateral wall of said nut (15).
6. like claim 4 or 5 described heating power expansion valves; It is characterized in that; Said first edge part (41) seal weld is connected on the diapire of said installing hole (14), is provided with first seal (45) between the diapire of perhaps said first edge part (41) and said installing hole (14).
7. a heating power expansion valve comprises valve body (1) and the valve hole part (2) that is slidingly matched with said valve body (1); Said valve body (1) is provided with second hub cavity (12) and is built-in with the counter balance pocket (13) of elastomeric element (22), and said heating power expansion valve also comprises second seal member of isolating the two; It is characterized in that; Said second seal member comprises second flexible seals that can stretch with said valve hole part (2) motion; Said second flexible seals is located between the bottom of said elastomeric element (22) and said valve hole part (2), and its second edge part (51) is sealedly attached on the said valve body (1).
8. heating power expansion valve as claimed in claim 7; It is characterized in that; Said second flexible seals is second bellows (5), and said second bellows (5) comprises second ripple sleeve part (52) that can stretch vertically and second closure of at one end sealing this second ripple sleeve part (52); Said elastomeric element (22) comprises spring base (221), and said second closure is held between the bottom of said spring base (221) and said valve hole part (2).
9. heating power expansion valve as claimed in claim 8; It is characterized in that; The lower end of said valve body (1) is combined with regulates seat (6); Said valve body (1) is provided with interior step surface, and said second edge part (51) is held between the roof and said interior step surface of said adjusting seat (6), and said second edge part (51) is tightly connected with said interior step surface.
10. heating power expansion valve as claimed in claim 9; It is characterized in that; Further arrange vertically between the roof of said adjusting seat and the said interior step surface and be provided with first pad (61) and second pad (62), said interior step surface comprises the first interior step surface (16) that said first pad (61) is set and step surfaces (17) in said second pad (62) second is set; Said second edge part (51) further is held between said first pad (61) and said second pad (62), and step surface (16) is tightly connected in said second edge part (51) and said first.
11. heating power expansion valve as claimed in claim 10 is characterized in that, the circumferential ends of said second edge part (51) further is provided with second flange (54) that is stuck on said first pad (61) lateral wall.
12., it is characterized in that said second closure is the second straight section portion (531) like claim 10 or 11 described heating power expansion valves, and this second straight section portion (531) seals the said second ripple sleeve part (52) in the bottom; The bottom of said valve hole part (2) is stretched into the said second ripple sleeve part (52) from the top, and its lower surface is the plane, and fits with the medial surface of stating the second straight section portion (531); The roof of the lateral surface of the said second straight section portion (531) and said spring base (221) is fitted.
13. heating power expansion valve as claimed in claim 12 is characterized in that, said first pad (61) is located at the outside of the said second ripple sleeve part (52) with its endoporus; The inner end of said second pad (62) radially exceeds the inner end of said first pad (61) to the inside, and fits with the inner end of said second edge part (51).
14. like claim 11 or 12 described heating power expansion valves; It is characterized in that; Said second closure is second depressed part (532); And this second depressed part (532) is at the said second ripple sleeve part (52) of top closure, and the lower surface of said valve hole part (2) is the sphere that cooperates with the outer concave surface of said second depressed part (532); Said spring base (221) is provided with protuberance (221a) vertically, and this protuberance (221a) stretches into the said second ripple sleeve part (52) from the bottom, and the medial surface of its roof and said second depressed part (532) is fitted.
15. heating power expansion valve as claimed in claim 14 is characterized in that, said second pad (62) is located at the outside of the said second ripple sleeve part (52) with its endoporus; The inner end of said first pad (61) radially exceeds the inner end of said second pad (62) to the inside, and fits with the inner end of said second edge part (51).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110106889.8A CN102759232B (en) | 2011-04-27 | 2011-04-27 | Heating power expansion valve |
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| CN201110106889.8A CN102759232B (en) | 2011-04-27 | 2011-04-27 | Heating power expansion valve |
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| CN102759232B CN102759232B (en) | 2015-12-09 |
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| CN201110106889.8A Active CN102759232B (en) | 2011-04-27 | 2011-04-27 | Heating power expansion valve |
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| CN102759232B (en) | 2015-12-09 |
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