CN102759232B - Heating power expansion valve - Google Patents
Heating power expansion valve Download PDFInfo
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- CN102759232B CN102759232B CN201110106889.8A CN201110106889A CN102759232B CN 102759232 B CN102759232 B CN 102759232B CN 201110106889 A CN201110106889 A CN 201110106889A CN 102759232 B CN102759232 B CN 102759232B
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Abstract
The invention discloses a kind of heating power expansion valve, comprise valve body (1) and valve hole part (2); Described valve body (1) is provided with first interface chamber (11), described valve body (1) is connected with gas tank (3), and described gas tank (3) is provided with cavity of resorption (35) and is located at the drive disk assembly (21) in described cavity of resorption (35); Described heating power expansion valve also comprises the first seal member of the described first interface chamber (11) of isolation and described cavity of resorption (35); Described first seal member comprises and can carry out with described valve hole part (2) motion the first flexible seals of stretching, described first flexible seals is located between the upper end of described drive disk assembly (21) and described valve hole part (2), and its first edge part (41) is sealedly attached on described valve body (1).The structural design of this heating power expansion valve can improve the reliability sealed between valve body and valve hole part upper end on the one hand, and improves the sensitivity of valve; The difficulty of processing of valve body and valve hole part can be reduced on the other hand.In addition, the invention also discloses the heating power expansion valve of another kind of version.
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 the vitals of composition refrigeration system, is another basic element of character removed in refrigeration system four basic elements of character outside evaporimeter, compressor and condenser.The Main Function of heating power expansion valve carrys out the aperture size of control valve by the degree of superheat of evaporator outlet end or compressor suction side in induction refrigeration system, thus realize the object of the adjustment of system cold medium flux and reducing pressure by regulating flow.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of typical heating power expansion valve in prior art.
This heating power expansion valve comprises valve body 1 ', and the upper end of valve body 1 ' is connected with the gas tank comprising the gentle case lid 2 ' 5 of gas tank seat 2 ' 4, and 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 is by being filled with refrigerant and being connected with temperature-sensitive bag 4 ' 2 by capillary 4 ' 1, and temperature-sensitive bag 4 ' 2 for experiencing the degree of superheat of the refrigerant of evaporator outlet end or suction port of compressor end, and produces a temperature, pressure P in epicoele
b; Meanwhile, cavity of resorption 2 ' 3 is communicated with described evaporator outlet end by balance pipe (not shown), thus produces an evaporating pressure P in cavity of resorption 2 ' 3
o.
In addition, as shown in Figure 1, be formed with valve 1 ' 1 in the inner chamber of valve body 1 ', this valve 1 ' 1 is combined with spool 3 ' 1, and 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 being positioned at cavity of resorption; It should be noted that, in this prior art, spool 3 ' 1, drive link 3 ' 2 and SDeflector hereinafter described 3 ' 4 are collectively referred to as valve hole part, and thus in this prior art, valve hole part is a kind of point of body component; The outer cover of spool 3 ' 1 is equipped with guide ring 7 ', and the cavity of this guide ring below 7 ' is counter balance pocket 1 ' 4, is provided with and supports the spring 6 ' of spool 3 ' 1 in counter balance pocket 1 ' 4, and this spring 6 ' is to spool 3 ' 1 one elastic force P upwards
t.
Using spool 3 ' 1 and drive link 3 ' 2 as force analysis object, spool 3 ' 1 and drive link 3 ' 2 are subject to an elastic force P upwards
t, can be subject to the downward thrust that driver blade 3 ' 3 gives, this thrust promotes driver blade 3 ' 3 by diaphragm 2 ' 1 and is formed, thus this thrust that is power that diaphragm 2 ' 1 is moved downward, that is P simultaneously
b-P
o; When 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, thus promotion spool 3 ' 1 moves downward, thus increase the flow of refrigerant; When the temperature of evaporator outlet end is too low, P
breduce, thus promotion spool 3 ' 1 moves upward, thus reduce the flow of refrigerant.
But as shown in Figure 1, in practical work process, spool 3 ' 1 is except being subject to said temperature pressure P
b, evaporating pressure P
owith spring force P
toutside, also can be subject to the pressure in the pressure that spool 3 ' 1 is opened that refrigerant in first interface chamber 1 ' 2 produces and the second hub cavity 1 ' 3, spool 3 ' 1 being closed, the difference of these two pressure produces a system pressure difference; For low capacity valve or low voltage refrigeration system, this system pressure difference substantially negligible on the impact of spool 3 ' 1, but for Large Copacity valve or high-pressure refrigeration system, the impact on spool 3 ' 1 of this system pressure difference is very large, thus drastically influence 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 interface chamber 1 ' 2 and counter balance pocket 1 ' 4, the lower end of this through hole 3 ' 11 is combined with SDeflector 3 ' 4, between this SDeflector 3 ' 4 and through hole 3 ' 11, there is gap, thus make the pressure of two chambers equal, make the second pressure-bearing surface S ' 2 in first interface chamber 1 ' 2 equal with the lifting surface area of the first pressure-bearing surface S ' 1 in counter balance pocket 1 ' 4 simultaneously, because the Impact direction of the first pressure-bearing surface S ' 1 and the second pressure-bearing surface S ' 2 is contrary, thus the refrigerant in first interface chamber 1 ' 2 is cancelled out each other to the pressure that spool 3 ' 1 produces, as shown in Figure 2, Impact direction the 3rd contrary pressure-bearing surface S ' 3 and the 4th pressure-bearing surface S ' 4 is provided with in second hub cavity 1 ' 3, because the lifting surface area of these two pressure-bearing surfaces is equal, the refrigerant thus in the second hub cavity 1 ' 3 is cancelled out each other to the pressure that spool 3 ' 1 produces.Thus, no matter refrigerant flows to the second hub cavity 1 ' 3 by first interface chamber 1 ' 2, or flows to first interface chamber 1 ' 2 by the second hub cavity 1 ' 3, and system pressure difference is zero substantially, and thus heating power expansion valve can realize bidirectional balanced flowing.
But, in the above prior art, as shown in Figure 1, between the upper end of drive link 3 ' 2 and valve body 1 ', be provided with the first seal member 8 ' 1, for isolating first interface chamber 1 ' 2 and cavity of resorption 2 ' 3; The second seal member 8 ' 2 is provided with, for isolating the second hub cavity 1 ' 3 and counter balance pocket 1 ' 4 between spool 3 ' 1 and guide ring 7 '; Drive link 3 ' 2 and spool 3 ' 1 move vertically, and thus above-mentioned two kinds of sealings are transmission seal, have following defect:
The first, the sealing property of transmission seal is unreliable, along with the prolongation of service time, and rubber aging, leakage can strengthen, and then the degree of superheat of heating power expansion valve can be made to strengthen, and affects reliability and the accuracy of heating power expansion valve work;
The second, the frictional resistance of transmission seal is large, and along with the prolongation of service time, rubber aging, and frictional resistance may strengthen further, thus affects the sensitivity of heating power expansion valve;
3rd, the quality of fit between valve body 1 ' and drive link 3 ' 2 and between spool 3 ' 1 and guide ring 7 ' requires high, and the difficulty of processing of valve body 1 ', drive link 3 ' 2, spool 3 ' 1 and guide ring 7 ' is large; If be not adopt seal to seal between valve body 1 ' and drive link 3 ' 2 and between spool 3 ' 1 and guide ring 7 ', but adopt high-precision fitted seal, then the difficulty of processing of valve body 1 ', drive link 3 ' 2, spool 3 ' 1 and guide ring 7 ' can be larger.
Summary of the invention
The technical problem to be solved in 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 sealed between valve body and valve hole part upper end on the one hand, and improves the sensitivity of valve; The difficulty of processing of valve body and valve hole part can be reduced on the other hand.
For solving the problems of the technologies described above, the invention provides a kind of heating power expansion valve, the valve hole part comprising valve body and coordinate with described valve body slides; Described valve body is provided with first interface chamber, and described valve body is connected with gas tank, and described gas tank is provided with cavity of resorption and is located at the drive disk assembly in described cavity of resorption; Described heating power expansion valve also comprises the first seal member of the described first interface chamber of isolation and described cavity of resorption; Described first seal member comprises and can carry out with the motion of described valve hole part the first flexible seals of stretching, described first flexible seals is located between the upper end of described drive disk assembly and described valve hole part, and its first edge part is sealedly attached on described valve body.
Preferably, flexible seals described in first is the first bellows; Described first bellows comprises the first ripple sleeve part that can stretch vertically and the first straight section portion closing this first ripple sleeve part from one end; The upper end of described valve hole part is stretched in described first ripple sleeve part, and the medial surface in its upper surface and described first straight section portion is fitted.
Preferably, described drive disk assembly comprises driver blade and the transmission that is connected with described driver blade is followed closely, and described first straight section portion is located between described transmission nail with the upper end of described valve hole part, and the diapire that the lateral surface in described first straight section portion and described transmission are followed closely is fitted.
Preferably, the top ends of described valve body is provided with the installing hole installing described first bellows, and has been threaded connection nut in this installing hole; Described nut is loaded on the outside of described first ripple sleeve part and described transmission nail by its inner hole sleeve, and is pressed on the diapire of described installing hole by described first edge part; Be tightly connected between described first edge part and the diapire of described installing hole.
Preferably, the circumferential ends of described first edge part is provided with the first flange further, and the bottom of described installing hole sidewall is provided with the groove relative with described first flange position; Described first flange stretches in described groove, and is stuck on the lateral wall of described nut.
Preferably, described first edge part seal welding on the diapire of described installing hole, or is provided with the first seal between described first edge part and the diapire of described installing hole.
On the basis of existing technology, first seal member of heating power expansion valve provided by the present invention comprises and can carry out with described valve hole part motion the first flexible seals of stretching, described first flexible seals is located between the upper end of described drive disk assembly and described valve hole part, and its first edge part is sealedly attached on described valve body.
Along with valve hole part moves vertically, the first flexible seals is also along with stretching in the axial direction, and its first edge part is sealedly attached on valve body, and thus this first flexible seals is all the time by described cavity of resorption and the isolation of described first interface chamber; And the sealing means particularly, between the first edge part and valve body can be seal welding or adopt the static seal structures such as seal sealing.Relative to transmission seal of the prior art, sealing in the present invention between the first edge part and valve body is static seal structure, the reliability of sealing is high, the probability leaked is lower, thus the degree of superheat of heating power expansion valve be can not strengthen, thus reliability and the accuracy of heating power expansion valve work significantly improved.In addition, in the present invention, hermetically-sealed construction is present between the first edge part and valve body, instead of between valve hole part and valve body, thus valve hole part is in the process of moving vertically, can not be subject to the impact of frictional resistance, and thus the sensitivity of valve is higher.Moreover in the present invention, be static seal structure between the first edge part and valve body, instead of adopt transmission seal structure of the prior art, thus 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 sealed between valve body and valve hole part upper end on the one hand, and improves the sensitivity of valve; The difficulty of processing of valve body and valve hole part can be reduced on the other hand.
In addition, another technical problem that will solve of the present invention is for providing the heating power expansion valve of another kind of version, and the structural design of this heating power expansion valve can improve the reliability of isolating seal between counter balance pocket and the second hub cavity on the one hand, and improves the sensitivity of valve; The difficulty of processing of valve hole part can be reduced on the other hand.
For solving the problems of the technologies described above, the invention provides a kind of heating power expansion valve, the valve hole part comprising valve body and coordinate with described valve body slides; Described valve body is provided with the second hub cavity and is built-in with the counter balance pocket of elastomeric element, and described heating power expansion valve also comprises the second seal member of both isolation; Described second seal member comprises and can carry out with the motion of described valve hole part the second flexible seals of stretching, described second flexible seals is located between the bottom of described elastomeric element and described valve hole part, and its Second Edge edge is sealedly attached on described valve body.
Preferably, described second flexible seals is the second bellows, and described second bellows comprises the second ripple sleeve part that can stretch vertically and the second closure at one end closing this second ripple sleeve part; Described elastomeric element comprises spring base, and described second closure is held between the bottom of described spring base and described valve hole part.
Preferably, the lower end of described valve body is combined with adjustment seat, and described valve body is provided with interior step surface, and described Second Edge edge is held between the roof of described adjustment seat and described interior step surface, and described Second Edge edge and described interior step surface are tightly connected.
Preferably, arrange vertically further between the roof of described adjustment seat and described interior step surface and be provided with the first pad and the second pad, described interior step surface comprise arrange described first pad first in step surface and step surface in described second pad second is set; Described Second Edge edge is held between described first pad and described second pad further, and in described Second Edge edge and described first, step surface is tightly connected.
Preferably, the circumferential ends of described Second Edge edge is provided with the second flange be stuck on described first pad lateral wall further.
Preferably, described second closure is the second straight section portion, and this second straight section portion second ripple sleeve part described in bottom end closure; The bottom of described valve hole part is stretched into described second ripple sleeve part from top, and its lower surface is plane, and fits with the medial surface stating the first straight section portion; The described lateral surface in the second straight section portion and the roof of described spring base are fitted.
Preferably, the outside of described second ripple sleeve part is located at by described first pad with its endoporus; The inner end of described second pad radially exceeds the inner end of described first pad to the inside, and fits with the inner end of described Second Edge edge.
Preferably, described second closure is the second depressed part, and this second depressed part second ripple sleeve part described in top closure, the lower surface of described valve hole part is the sphere coordinated with the outer concave surface of described second depressed part; Described spring base is provided with protuberance vertically, and this protuberance stretches into described second ripple sleeve part from bottom, and the medial surface of its roof and described second depressed part is fitted.
Preferably, the outside of described second ripple sleeve part is located at by described second pad with its endoporus; The inner end of described first pad radially exceeds the inner end of described second pad to the inside, and fits with the inner end of described Second Edge edge.
On the basis of existing technology, second seal member of heating power expansion valve provided by the present invention comprises and can carry out with described valve hole part motion the second flexible seals of stretching, described second flexible seals is located between the bottom of described elastomeric element and described valve hole part, and its Second Edge edge is sealedly attached on described valve body.
Along with valve hole part moves vertically, the second flexible seals is also along with stretching in the axial direction, and its Second Edge edge is sealedly attached on valve body, and thus this second flexible seals is all the time by described counter balance pocket and described second hub cavity isolation; And the sealing means particularly, between Second Edge edge and valve body can be seal welding or adopt the static seal structures such as seal sealing.Relative to transmission seal of the prior art, sealing in the present invention between Second Edge edge and valve body is static seal structure, the reliability of sealing is high, the probability leaked is lower, thus the degree of superheat of heating power expansion valve be can not strengthen, thus reliability and the accuracy of heating power expansion valve work significantly improved.In addition, in the present invention, hermetically-sealed construction is present between Second Edge edge and valve body, instead of between valve hole part and guide ring, thus valve hole part is in the process of moving vertically, can not be subject to the impact of frictional resistance, and thus the sensitivity of valve is higher.Moreover in the present invention, be static seal structure between Second Edge edge and valve body, instead of adopt transmission seal structure of the prior art, thus 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 counter balance pocket and the second hub cavity on the one hand, and improves the sensitivity of valve; The difficulty of processing of valve hole part can be reduced on the other hand.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of typical heating power expansion valve in 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 in Fig. 2;
Fig. 4 is the structural representation of the first bellows in Fig. 2 and Fig. 3;
Fig. 5 is the structural representation of the first specific embodiment of another kind of heating power expansion valve provided by the present invention;
Fig. 6 is the enlarged drawing at B position in Fig. 5;
Fig. 7 is the structural representation of the second bellows in Fig. 5 and Fig. 6;
Fig. 8 is the structural representation of the second specific embodiment of another kind of heating power expansion valve provided by the present invention;
Fig. 9 is the enlarged drawing at C position in Fig. 8;
Figure 10 is the structural representation of the second bellows in Fig. 8 and Fig. 9.
Wherein, the corresponding relation in Fig. 1 between Reference numeral and component names is:
1 ' valve body; 1 ' 1 valve port; 1 ' 2 first interface chambeies; 1 ' 3 second hub cavity; 1 ' 4 counter balance pocket;
2 ' 1 diaphragm; 2 ' 2 epicoeles; 2 ' 3 cavity of resorptions; 2 ' 4 gas tank seats; 2 ' 5 gas tank lids;
3 ' 1 spool; 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 surface; S ' 3 the 3rd pressure-bearing surface; S ' 4 the 4th pressure-bearing surface;
4 ' 1 capillary; 4 ' 2 temperature-sensitive bags; 6 ' spring; 7 ' guide ring;
8 ' 1 first seal member; 8 ' 2 second seal members.
Corresponding relation in Fig. 2 to Figure 10 between Reference numeral and component names is:
1 valve body; 11 first interface chambeies; 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 transmission nails; 22 elastomeric elements; 221 spring bases; 221a protuberance; 222 springs;
3 gas tanks; 31 gas tank seats; 32 gas tank lids; 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 edges; 52 second ripple sleeve parts; 531 second straight section portions; 532 second depressed parts; 54 second flange; 55 second seals;
6 adjustment seats; 61 first pads; 62 second pads.
Detailed description of the invention
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 sealed between valve body and valve hole part upper end on the one hand, and improves the sensitivity of valve; The difficulty of processing of valve body and valve hole part can be reduced on the other hand.
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to shown in Fig. 2, Fig. 3 and Fig. 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 in Fig. 2; Fig. 4 is the structural representation of the first bellows in Fig. 2 and Fig. 3.
In one embodiment, as shown in Figure 2, heating power expansion valve provided by the present invention, the lumen segmentation of valve body, when valve hole part 2 seals valve port 18, is first interface chamber 11 and the second hub cavity 12 by the valve hole part 2 comprising valve body 1 and be slidably matched with valve body 1; Valve body 1 is connected with gas tank 3, and gas tank comprises the diaphragm 33 that gas tank seat 31, gas tank lid 32 and the inner chamber by gas tank are divided into epicoele 34 and cavity of resorption 35, is provided with drive disk assembly 21 further in gas tank 3; Described heating power expansion valve also comprises the first seal member of isolation first interface chamber 11 and cavity of resorption 35.
As shown in Figure 2, on the basis of above-mentioned prior art, first seal member comprises further and can carry out with valve hole part 2 motion the first flexible seals of stretching, described 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 valve body 1.
Along with valve hole part 2 moves vertically, the first flexible seals is also along with stretching in the axial direction, and its first edge part 41 is sealedly attached on valve body 1, and thus cavity of resorption 35 and first interface chamber 11 are isolated by this first flexible seals all the time; And the sealing means particularly, between the first edge part 41 and valve body 1 can be seal welding or adopt the static seal structures such as seal sealing.Relative to transmission seal structure of the prior art, sealing in the present invention between the first edge part 41 and valve body 1 is static seal structure, the reliability of sealing is high, the probability leaked is lower, thus the degree of superheat of heating power expansion valve be can not strengthen, thus reliability and the accuracy of heating power expansion valve work significantly improved.In addition, in the present invention, hermetically-sealed construction is present between the first edge part 41 and valve body 1, instead of between valve hole part 2 and valve body 1, thus valve hole part 2 is in the process of moving vertically, can not be subject to the impact of frictional resistance, and thus the sensitivity of valve is higher.Moreover in the present invention, be static seal structure between the first edge part 41 and valve body 1, instead of adopt transmission seal structure of the prior art, thus 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 think a kind of isolating seal Rotating fields, this isolating seal Rotating fields is held between the upper end of drive disk assembly 21 and valve hole part 2, and its edge part is sealedly attached on valve body 1, be similar to the upper end of valve hole part 2 parcel thus cavity of resorption 35 isolating seal making it with gas tank 3, and then make first interface chamber 11 and cavity of resorption 35 isolating seal; Edge part due to this isolating seal Rotating fields is sealedly attached on valve body 1, fixed relative to valve body 1, thus along with valve hole part 2 moves vertically, the centre (being specifically as follows the first ripple sleeve part 42 hereinafter) of this isolating seal Rotating fields needs to stretch vertically, thus all the time by the upper end of valve hole part 2 and cavity of resorption 35 isolating seal.
Particularly, as shown in Figure 4, this flexible seals described in first is specifically as follows the first bellows 4, this first bellows 4 comprises the first ripple sleeve part 42 and the first straight section portion 43, first ripple sleeve part 42 can stretch in the axial direction, first straight section portion 43 closing on top by the first ripple sleeve part 42, makes the opening down of this first wave sleeve part 42; 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 in its upper surface and the first straight section portion 43 is fitted.In the structure shown here, along with valve hole part 2 moves vertically, the first ripple sleeve part 42 extends in the axial direction or compresses, and flexible regularity is higher, thus has higher functional reliability.In addition, because the medial surface in valve hole part 2 upper surface and the first straight section portion 43 is fitted, the transmission of power is thus more conducive to.
In technique scheme, as shown in Figure 2, drive disk assembly 21 comprises driver blade 211 and the transmission that is connected with driver blade 211 is followed closely the 212, first straight section portion 43 and is located at transmission further and follows closely between 212 and the upper end of valve hole part 2, and the diapire that the lateral surface in the first straight section portion 43 and transmission follow closely 212 is fitted.Particularly, in order to make capable can effectively transmission, and reduce the abnormal deformation in the first straight section portion 43, as shown in Figure 2, first straight section portion 43 and transmission follow closely 212 contact area should be large as much as possible, make the lateral surface in the first straight section portion 43 can all or substantially all covering transmission follow closely the diapire of 212.
In technique scheme, specific design can also be made to the fixed structure of the 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 for arranging the first bellows 4, and this installing hole 14 internal thread is 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 by its inner hole sleeve, and is pressed on the diapire of installing hole 14 by the first edge part 41; Be tightly connected between first edge part 41 and the diapire of installing hole 14.This kind of fixed structure achieves the fixed installation of the first bellows 4 easily, and owing to being dismountable threaded engagement between nut 15 and installing hole 14, thus after the first bellows 4 damages, nut 15 can being dismantled, change the first bellows.In addition, the first edge part 41 is pressed on the diapire of installing hole 14 by necessarily obtaining moment of torsion by nut 15, thus can improve the sealing property between the first edge part 41 and the diapire of installing hole 14 further.
Further, tremble diametrically to prevent the first bellows 4, as shown in Figure 4, the circumferential ends of the first edge part 41 can be provided with the first flange 44 further, as shown in Figure 3, the bottom of installing hole 14 sidewall is provided with groove 141, first flange 44 relative with the first flange 44 position and stretches in groove 141, and is stuck on the lateral wall of nut 15.
Particularly, design can also be made to the hermetically-sealed construction between the first edge part 41 and the diapire of installing hole 14.Such as, the first edge part 41 can seal welding on the diapire of installing hole 14, or the first edge part 41 and the diapire of installing hole 14 can be provided with the first seal 45.
In addition, another core of the present invention is for providing the heating power expansion valve of another kind of version, and the structural design of this heating power expansion valve can improve the reliability of isolating seal between counter balance pocket and the second hub cavity on the one hand, and improves the sensitivity of valve; The difficulty of processing of valve hole part can be reduced on the other hand.
Please refer to Fig. 5, Fig. 6 and Fig. 7, Fig. 5 is the structural representation of the first specific embodiment of another kind of heating power expansion valve provided by the present invention; Fig. 6 is the enlarged drawing at B position in Fig. 5; Fig. 7 is the structural representation of the second bellows in Fig. 5 and Fig. 6.
In basic technology scheme, as shown in Figure 5, be provided with elastomeric element 22 in counter balance pocket 13, this elastomeric element 22 comprises spring 222 and spring base 221, and heating power expansion valve also comprises the second seal member of isolation counter balance pocket 13 and the second hub cavity 12; On this basis, as shown in Figure 5 and Figure 6, described second seal member comprises and can carry out with valve hole part 2 motion the second flexible seals of stretching, and described second flexible seals is located between the bottom of elastomeric element 22 and valve hole part 2, and its Second Edge edge 51 is sealedly attached on valve body 1.
Along with valve hole part 2 moves vertically, the second flexible seals is also along with stretching in the axial direction, and its Second Edge edge 51 is sealedly attached on valve body 1, and thus counter balance pocket 13 and the second hub cavity 12 are isolated by this second flexible seals all the time; And the sealing means particularly, between Second Edge edge 51 and valve body 1 can be seal welding or adopt the static seal structures such as seal sealing.Relative to transmission seal of the prior art, sealing in the present invention between Second Edge edge 51 and valve body 1 is static seal structure, the reliability of sealing is high, the probability leaked is lower, thus the degree of superheat of heating power expansion valve be can not strengthen, thus reliability and the accuracy of heating power expansion valve work significantly improved.In addition, in the present invention, hermetically-sealed construction is present between Second Edge edge 51 and valve body 1, instead of between valve hole part 2 and guide ring, thus valve hole part 2 is in the process of moving vertically, can not be subject to the impact of frictional resistance, and thus the sensitivity of valve is higher.Moreover in the present invention, be static seal structure between Second Edge edge 51 and valve body 1, instead of adopt transmission seal structure of the prior art, thus 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 think a kind of isolating seal Rotating fields, this isolating seal Rotating fields is held between the bottom of spring base 221 and valve hole part 2, and its edge part is sealedly attached on valve body 1, this similar in being wrapped up the bottom of valve hole part 2 thus making itself and counter balance pocket 13 isolating seal, and then makes the second hub cavity 12 and counter balance pocket 13 isolating seal; Edge part due to this isolating seal Rotating fields is sealedly attached on valve body 1, fixed relative to valve body 1, thus along with valve hole part 2 moves vertically, the centre (being specifically as follows the second ripple sleeve part 52 hereinafter) of this isolating seal Rotating fields needs to stretch vertically, thus all the time by the bottom of valve hole part 2 and counter balance pocket 13 isolating seal.
In above-mentioned basic technology scheme, specific design can be made to the structure of the second flexible seals.Such as, as shown in Figure 7, described second flexible seals is that the second bellows 5, second bellows 5 comprises the second ripple sleeve part 52 that can stretch vertically and the second closure at one end closing this second ripple sleeve part; On this basis, as shown in Figure 6, the second closure is held between the bottom of spring base 221 and valve hole part 2.In the structure shown here, along with valve hole part 2 moves vertically, the second ripple sleeve part 52 extends in the axial direction or compresses, and flexible regularity is higher, thus has higher functional reliability.
Particularly, further improvement is made on the basis of technique scheme, the first embodiment can be obtained.In this first embodiment, as shown in Figure 7, described second closure is the second straight section portion 531, and opening up at bottom end closure second ripple sleeve part 52, second ripple sleeve part 52 of this second straight section portion 531; 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 top, and its lower surface is plane, and fits with the medial surface in the first straight section portion 531, thus is more conducive to the transmission of power; In addition, the lateral surface in the second straight section portion 531 and the roof of spring base 221 are fitted, and particularly, as shown in Figure 6, 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 capablely more effectively to transmit, and avoiding the second straight section portion 531 that abnormal deformation occurs, the second straight section portion 531 should maximize with the diapire contact area of cell body, makes the lateral surface in the second straight section portion 531 diapire that is whole or whole covering cell body substantially.
On the basis of upper basic technology scheme, another kind of improvement can also be made, thus obtain the second embodiment of the present invention, specifically refer to Fig. 8, Fig. 9 and Figure 10, Fig. 8 is the structural representation of the second specific embodiment of another kind of heating power expansion valve provided by the present invention; Fig. 9 is the enlarged drawing at C position in Fig. 8; Figure 10 is the structural representation of the second bellows in Fig. 8 and Fig. 9.
In this second embodiment, as shown in Figure 10, described second closure is the second depressed part 532, and this second depressed part 532 second ripple sleeve part 52 described in top closure, this second ripple sleeve part 52 opening down; On this basis, as shown in Figure 9, the lower surface of valve hole part 2 is the sphere coordinated with the outer concave surface of the second depressed part 532; Further, spring base 221 is provided with protuberance 221a vertically, and this protuberance 221a stretches into the second ripple sleeve part 52 from bottom, and the medial surface of its roof and the 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, extends or compression vertically, and obviously this kind of structural design also can technical solution problem, realizes goal of the invention.
Particularly, in above-mentioned two kinds of embodiments, specific design can be made to the fixed structure between Second Edge edge 51 and valve body 1.Such as, as shown in Figure 5 and Figure 8, the lower end of valve body 1 is combined with adjustment seat 6, and valve body 1 is provided with interior step surface, and particularly, adjustment seat 6 is located in the internal thread hole of valve body 1 lower end by threaded engagement; On this basis, Second Edge edge 51 is held between the roof of adjustment seat 6 and described interior step surface, and Second Edge edge 51 and described interior step surface are tightly connected.This kind of structural design achieves the fixing of Second Edge edge 51 easily, and relatively simple for structure, and cost is lower.
Certainly, further improvement can also be made by above-mentioned fixed structure.Such as, as shown in Fig. 5, Fig. 6, Fig. 8 and Fig. 9, arrange vertically further between the roof of adjustment seat 6 and described interior step surface and be provided with the first pad 61 and the second pad 62, described interior step surface to comprise in first step surface 17 in step surface 16 and second, first pad 61 is supported in first on step surface 16, and the second pad 62 to be supported in second on step surface 17; On this basis, Second Edge edge 51 is held between the first pad 61 and the second pad 62 further, and in Second Edge edge 51 and first, step surface 16 is tightly connected.Second Edge edge 51 is fixed by the mode that this kind of structural design is gripped by two pads, thus avoids Second Edge edge 51 and damage the Hermetical connecting structure between itself and valve body 1 owing to being subject to the extruding of refrigerant.
In addition, in order to prevent the second bellows 5 from trembleing diametrically, as shown in Fig. 6 and Fig. 9, the circumferential ends of Second Edge edge 51 is provided with the second flange 55 be stuck on the first pad 61 lateral wall further.
As shown in Figure 6, in the first embodiment above-mentioned, the first pad 61 is located at the outside of the second ripple sleeve part 52 with its endoporus; The inner end of the second pad 62 radially exceeds the inner end of the first pad 61 to the inside, and fits with the inner end of Second Edge edge 51.This kind of structural design makes the second pad 62 substantially all cover Second Edge edge 51, makes the second the flexible of ripple sleeve part 52 have more regularity, avoids the second ripple sleeve part 52, in telescopic process, moderate finite deformation occurs, and then improve the reliability of work.
As shown in Figure 9, in above-mentioned the second embodiment, the second pad 62 is located at the outside of the second ripple sleeve part 52 with its endoporus; The inner end of the first pad 61 radially exceeds the inner end of the second pad 62 to the inside, and fits with the inner end of Second Edge edge 51.The technique effect of this kind of structural design is substantially identical with the technique effect described in epimere, does not repeat them here.
Finally; it should be noted that; in the present invention; described first flexible seals and described 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, thus by corresponding two cavity isolating seals, just all should within protection scope of the present invention.
Above two kinds of heating power expansion valves provided by the present invention are described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (15)
1. a heating power expansion valve, the valve hole part (2) comprising valve body (1) and be slidably matched with described valve body (1); Described valve body (1) is provided with first interface chamber (11), described valve body (1) is connected with gas tank (3), and described gas tank (3) is provided with cavity of resorption (35) and is located at the drive disk assembly (21) in described cavity of resorption (35); Described heating power expansion valve also comprises the first seal member of the described first interface chamber (11) of isolation and described cavity of resorption (35); It is characterized in that, described first seal member comprises and can carry out with described valve hole part (2) motion the first flexible seals of stretching, described first flexible seals is located between the upper end of described drive disk assembly (21) and described valve hole part (2), and its first edge part (41) is sealedly attached on described valve body (1).
2. heating power expansion valve as claimed in claim 1, it is characterized in that, described first flexible seals is the first bellows (4); Described first bellows (4) comprises the first ripple sleeve part (42) that can stretch vertically and the first straight section portion (43) closing this first ripple sleeve part from one end; The upper end of described valve hole part (2) is stretched in described first ripple sleeve part (42), and the medial surface in its upper surface and described first straight section portion (43) is fitted.
3. heating power expansion valve as claimed in claim 2, it is characterized in that, described drive disk assembly (21) comprises driver blade (211) and the transmission that is connected with described driver blade (211) is followed closely (212), described first straight section portion (43) is located between described transmission nail (212) and the upper end of described valve hole part (2), and the diapire that (212) are followed closely in the lateral surface in described first straight section portion (43) and described transmission is fitted.
4. heating power expansion valve as claimed in claim 3, it is characterized in that, the top ends of described valve body (1) is provided with the installing hole (14) installing described first bellows (4), and is connected with nut (15) by threaded engagement in this installing hole (14); Described nut (15) is loaded on the outside of described first ripple sleeve part (42) and described transmission nail (212) by its inner hole sleeve, and is pressed on the diapire of described installing hole (14) by described first edge part (41); Be tightly connected between the diapire of described first edge part (41) and described installing hole (14).
5. heating power expansion valve as claimed in claim 4, it is characterized in that, the circumferential ends of described first edge part (41) is provided with the first flange (44) further, and the bottom of described installing hole (14) sidewall is provided with the groove (141) relative with described first flange (44) position; Described first flange (44) is stretched in described groove (141), and is stuck on the lateral wall of described nut (15).
6. the heating power expansion valve as described in claim 4 or 5, it is characterized in that, described first edge part (41) seal welding on the diapire of described installing hole (14), or is provided with the first seal (45) between the diapire of described first edge part (41) and described installing hole (14).
7. a heating power expansion valve, the valve hole part (2) comprising valve body (1) and be slidably matched with described valve body (1); Described valve body (1) is provided with the second hub cavity (12) and is built-in with the counter balance pocket (13) of elastomeric element (22), and described heating power expansion valve also comprises the second seal member of both isolation; It is characterized in that, described second seal member comprises and can carry out with described valve hole part (2) motion the second flexible seals of stretching, described second flexible seals is located between the bottom of described elastomeric element (22) and described valve hole part (2), and its Second Edge edge (51) is sealedly attached on described valve body (1).
8. heating power expansion valve as claimed in claim 7, it is characterized in that, described second flexible seals is the second bellows (5), and described second bellows (5) comprises the second ripple sleeve part (52) that can stretch vertically and the second closure at one end closing this second ripple sleeve part (52); Described elastomeric element (22) comprises spring base (221), and described second closure is held between the bottom of described spring base (221) and described valve hole part (2).
9. heating power expansion valve as claimed in claim 8, it is characterized in that, the lower end of described valve body (1) is combined with adjustment seat (6), described valve body (1) is provided with interior step surface, described Second Edge edge (51) is held between the roof of described adjustment seat (6) and described interior step surface, and described Second Edge edge (51) and described interior step surface are tightly connected.
10. heating power expansion valve as claimed in claim 9, it is characterized in that, arrange vertically further between the roof of described adjustment seat and described interior step surface and be provided with the first pad (61) and the second pad (62), described interior step surface comprise arrange described first pad (61) first in step surface (16) and step surface (17) in described second pad (62) second is set; Described Second Edge edge (51) is held between described first pad (61) and described second pad (62) further, and in described Second Edge edge (51) and described first, step surface (16) is tightly connected.
11. heating power expansion valves as claimed in claim 10, is characterized in that, the circumferential ends of described Second Edge edge (51) is provided with the second flange (54) be stuck on described first pad (61) lateral wall further.
12. heating power expansion valves as described in claim 10 or 11, it is characterized in that, described second closure is the second straight section portion (531), and this second straight section portion (531) second ripple sleeve part (52) described in bottom end closure; The bottom of described valve hole part (2) is stretched into described second ripple sleeve part (52) from top, and its lower surface is plane, and fits with the medial surface in described second straight section portion (531); The described lateral surface in the second straight section portion (531) and the roof of described spring base (221) are fitted.
13. heating power expansion valves as claimed in claim 12, is characterized in that, described first pad (61) is located at the outside of described second ripple sleeve part (52) with its endoporus; The inner end of described second pad (62) radially exceeds the inner end of described first pad (61) to the inside, and fits with the inner end of described Second Edge edge (51).
14. heating power expansion valves as described in claim 10 or 11, it is characterized in that, described second closure is the second depressed part (532), and this second depressed part (532) second ripple sleeve part (52) described in top closure, the lower surface of described valve hole part (2) is the sphere coordinated with the outer concave surface of described second depressed part (532); Described spring base (221) is provided with protuberance (221a) vertically, this protuberance (221a) stretches into described second ripple sleeve part (52) from bottom, and the medial surface of its roof and described second depressed part (532) is fitted.
15. heating power expansion valves as claimed in claim 14, is characterized in that, described second pad (62) is located at the outside of described second ripple sleeve part (52) with its endoporus; The inner end of described first pad (61) radially exceeds the inner end of described second pad (62) to the inside, and fits with the inner end of described Second Edge edge (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110106889.8A CN102759232B (en) | 2011-04-27 | 2011-04-27 | Heating power expansion valve |
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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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| CN102759232A CN102759232A (en) | 2012-10-31 |
| CN102759232B true 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103245141B (en) * | 2013-05-28 | 2016-04-27 | 浙江三花制冷集团有限公司 | A kind of heating power expansion valve and assembly method thereof |
| CN108533208B (en) * | 2018-06-05 | 2024-05-14 | 南通中杰石油科研仪器有限公司 | Elastic gas sealing gasket for air seal of common screw thread oil pipe and sealing method |
| CN110541949A (en) * | 2019-10-09 | 2019-12-06 | 常州赛乐医疗技术有限公司 | Bulldoze formula anesthetic vaporizer cone valve |
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| CN1834507A (en) * | 2005-03-16 | 2006-09-20 | 浙江三花制冷集团有限公司 | Thermal expansion valve for preventing high pressure medium transmission portion from leakage |
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| CN102759232A (en) | 2012-10-31 |
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