CN105626922B - Heating power expansion valve - Google Patents
Heating power expansion valve Download PDFInfo
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- CN105626922B CN105626922B CN201410589420.8A CN201410589420A CN105626922B CN 105626922 B CN105626922 B CN 105626922B CN 201410589420 A CN201410589420 A CN 201410589420A CN 105626922 B CN105626922 B CN 105626922B
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Abstract
The present invention provides a kind of heating power expansion valve, and the valve body of the heating power expansion valve is to form valve body blank by cutting aluminium bar material or aluminium alloy bar, then carry out forging and stamping and aperture to valve body blank and formed.Since valve body blank is formed using forging and stamping mode, required complicated shape directly can be all forged and pressed out in all directions of valve body blank, the valve body profile of heating power expansion valve can be made more accurate, and can have smaller volume and weight.
Description
【Technical field】
The present invention relates to throttling control field more particularly to a kind of heating power expansion valves.
【Background technique】
Heating power expansion valve (Thermostatic Expansion Valve, TXV) is that air-conditioning and refrigeration equipment generally use
Throttle part, it can be throttled and be depressured to the liquid refrigerant for carrying out condenser, and according to the temperature of evaporator outlet
It spends to adjust the flow for the refrigerant for being sent into evaporator from condenser, to adapt to the continually changing needs of cooling load.Heating power is swollen
The General Principle that swollen valve controls refrigerant flow is：The temperature that evaporator outlet is sensed by air tank head, in air tank head
The temperature that is sensed according to air tank head of medium generate the thermal expansion of degree of correspondence, by thermally expanding to the valve being connect with air tank head
Bar generates pressure, and valve rod pushes spool mobile under the driving of the pressure, to adjust the aperture of valve opening, reaches adjusting refrigerant
The effect of flow.
The mental section such as aluminum profile of strip is usually used as raw material in existing thermal expansion valve manufacturing method,
It is cut along the direction vertical with the length direction of the profile, using the metal block cut as valve body blank, then
Processing, which is portalled, on valve body blank is and forms the valve body of heating power expansion valve, then air tank head, valve rod, valve heating power expansion valve
In the component assemblies to valve body such as core, regulating mechanism.But at least two opposite sides on the valve body blank cut down in this way
Face (two sections formed when cutting in valve body blank two sides) is biggish plane, is easy in this way so that valve body is formed outside
The more straight overall structure of contouring, volume and weight is all bigger, to increase the manufacturing cost of heating power expansion valve.And
And it may also be desirable to that processing is further processed to planar section biggish on valve body blank in practical manufacturing process, with
The more complicated shape for having more use value is formed, this necessarily makes the manufacturing process of heating power expansion valve more cumbersome.
Therefore, it is necessary to be improved to existing technology, to solve the above technical problem.
【Summary of the invention】
The heating power expansion valve that smaller, weight that the purpose of the present invention is to provide a kind of volumes is lighter, manufacture is easier.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of heating power expansion valve, including air tank head, valve rod, spool and valve body；The valve body is passed through by aluminum alloy materials
Forging process and formed, and including be in integral structure air tank head mounting portion, reflux portion, valve body interconnecting piece, flow control division
And base portion；The valve body interconnecting piece includes interconnecting piece main body, and the side in the reflux portion is arranged in the air tank head mounting portion,
The other side backwards to the air tank head mounting portion in the reflux portion, the flow control division packet is arranged in the interconnecting piece main body
The first throughput and the second throughput are included, the reflux portion backwards of the interconnecting piece main body is arranged in first throughput
The side backwards to the interconnecting piece main body of first throughput, second throughput is arranged in side, the base portion
It extends out from the base portion or partly from the base portion；The wherein first-class logical portion and the second throughput
Between offer valve opening, first throughput offers the first recirculation hole being connected to the valve opening, second throughput
Offer the second recirculation hole being connected to the valve opening；The reflux portion is provided with return flow line, and the air tank head mounting portion is set
It is equipped with the first mounting hole being connected to the return flow line；The air tank head is opposite with the air tank head mounting portion to be set fixedly
It sets, the valve rod and spool are mounted on the valve inner, and the spool is directed at the valve opening setting, and the valve rod passes through described
Reflux portion and valve body interconnecting piece, and one end of the valve rod is supported or is fixed on the air tank head, the other end is directed at the valve
Core；The heating power expansion valve senses the fluid work inside the return flow line via first mounting hole using the air tank head
Condition makes the medium inside the air tank head that harmomegathus occur according to the fluid condition that the air tank head senses, thus described in changing
The position of valve rod and spool relative to the valve opening, adjusts the aperture of the valve opening, so adjust by first recirculation hole,
Valve opening and the second recirculation hole flow through the flow of the fluid of the valve body.
The air tank head is mounted on the air tank head mounting portion and is partly accommodated in first mounting hole, described
Valve body is in its base portion and is provided with from the inside part of base portion valve chamber, and the valve chamber is connected to second recirculation hole；
The heating power expansion valve further includes regulating mechanism, and the spool is at least partially disposed in the valve chamber, the regulating mechanism
It is mounted in the valve chamber, provides the elastic force towards the end face of described valve rod one end to the spool.
The shape in the air tank head mounting portion and the reflux portion substantially pacify by circular ring shape or cylindrical shape, the air tank head
The partial region of the one end in dress portion and reflux portion side is connected, the top and the reflux portion of the interconnecting piece main body
The part of the surface of the other side backwards to the air tank head mounting portion be connected；First throughput and the second throughput
Shape is substantially cylindrical, and the bottom of the partial region of the side of first throughput and the interconnecting piece main body is linked to be one
Body；The base portion it is generally cylindrical in shape, one end and first throughput backwards to the interconnecting piece main body
The partial region of side is connected；A part of one end of second throughput and a part of first throughput one end are even
Integrally, the another part at the end of second throughput is connected with a part of the outer peripheral surface of the base portion；
Or the end of second throughput is connected with a part of the outer peripheral surface of the base portion；The reflux portion, first
The axial direction of throughput and the second throughput is parallel to each other or is substantially parallel to each other, and with the air tank head mounting portion and base portion
It is axially vertical or substantially vertical.
The interconnecting piece main body includes two opposite sides being connected between the top and bottom of the interconnecting piece main body
Portion and two opposite end faces；The axial direction that the distance between two end faces of the interconnecting piece main body are less than the reflux portion is long
Degree, and with the diameter of the base portion is roughly equal or diameter less than the base portion；The surface in the reflux portion and
The surface of first throughput, which is all formed with, is respectively relative to described two side surfaces protrusions, is generally shaped like semicolumn
The convex surface in face.
The valve body interconnecting piece further includes filling for cooperating with installation part to the heating power expansion valve is limited first
With portion；The radial section for being generally shaped like the semicylinder for being provided with through-hole or the first department of assembly of first department of assembly
Be generally shaped like C-shaped or V-arrangement；First department of assembly is convexly equipped at least one described side of the interconnecting piece main body,
And the axial direction of first department of assembly is axial parallel or substantially flat with the reflux portion, the first throughput and the second throughput
Row.
The valve body interconnecting piece further includes filling for cooperating with installation part to the heating power expansion valve is limited second
With portion；The outer shape of second department of assembly is substantially cylindrical, outwardly protrudes from the side of the valve body, axial direction and institute
The axial direction for stating reflux portion is parallel or substantially parallel, and second department of assembly is provided with the screw connection structure of non through hole.
The valve body interconnecting piece further include the reinforcing rib being connected between first throughput and the reflux portion and/or
The reinforcing rib being connected between second throughput and the reflux portion.
The interconnecting piece main body is generally shaped like cylinder, axial axially vertical, the both ends with the reflux portion
It is connected respectively with the partial region of the partial region of reflux portion side and first throughput side.
The valve body interconnecting piece further includes the assembly limited to the heating power expansion valve for cooperating with installation part
Portion；The outer shape of the department of assembly is substantially cylindrical, outwardly protrudes from the side of the valve body, the axial and reflux
The axial direction in portion is parallel or substantially parallel, and the department of assembly is provided with the screw connection structure of non through hole.
The valve body interconnecting piece further include the reinforcing rib being connected between first throughput and the reflux portion and/or
The reinforcing rib being connected between second throughput and the reflux portion.
Compared with prior art, heating power expansion valve provided by the invention is formed by cutting aluminium bar material or aluminium alloy bar
After valve body blank, then forging and stamping and aperture are carried out to valve body blank and form its valve body.Since valve body blank uses forging and stamping mode
It is formed, therefore directly can all forge and press out required complicated shape in all directions of valve body blank, without as existing
Biggish plane is formed in valve body blank two sides by the way that the method for cutting profile formation valve body blank is the same.With prior art phase
Than the valve body profile of heating power expansion valve provided by the invention is more accurate, and can have smaller volume and weight.
【Detailed description of the invention】
Fig. 1 is the stereoscopic schematic diagram of an embodiment of heating power expansion valve provided by the invention；
Fig. 2 is the internal structure schematic cross-sectional view of heating power expansion valve embodiment shown in FIG. 1；
Fig. 3 is the exploded view of heating power expansion valve embodiment shown in FIG. 1.
Fig. 4 is the stereoscopic schematic diagram of second embodiment of heating power expansion valve provided by the invention；
Fig. 5 is the stereoscopic schematic diagram of the third embodiment of heating power expansion valve provided by the invention；
Fig. 6 is the stereoscopic schematic diagram of the 4th embodiment of heating power expansion valve provided by the invention；
Fig. 7 is the stereoscopic schematic diagram of the 5th embodiment of heating power expansion valve provided by the invention；
Fig. 8 is the stereoscopic schematic diagram of the 6th embodiment of heating power expansion valve provided by the invention.
【Specific embodiment】
The present invention will be further explained below with reference to the attached drawings and specific examples.
It please referring to Fig.1 to Fig.3, an embodiment of heating power expansion valve of the invention provides a kind of heating power expansion valve 100,
The heating power expansion valve 100 includes valve body 10, air tank head 20, valve rod 30, spool 40 and regulating mechanism 50.The heating power expansion valve 100
Suitable for carrying out throttling control to multiple fluid, in the present embodiment in order to describe more intuitive, only with the heating power is swollen
Swollen valve 100 is for be described in detail for throttling control to refrigerant in automotive air-conditioning system；But this field skill
Art personnel obviously should be understood that the type of fluid that throttling control can be carried out by the heating power expansion valve 100 is not limited to freeze
Agent.
Specific introduction will be done to specific structure, assembly method and the application method of above-mentioned each element below.In order to just
In description, the end that valve body 10 shown in figure is in top shown in figure is called top from here on, in figure
The end of shown lower section is known as bottom end；The part that top is closer in valve body 10 is known as top, is closer to the part of bottom end
Referred to as lower part, the part between top and lower part are known as middle part.When describing the geometrical relationship between certain components, may relate to
And the saying of " substantially vertical " and " substantially parallel ".Hereinafter, " substantially vertical " and " substantially parallel " between component refers to
It is, although substantially not accurate vertical and parallel relationship between component, if not by accurate measurement, position
The case where relationship intuitively is being difficult to distinguish with accurately vertical and parallel, such as angular deviation is not more than 1 degree.
Valve body 10 is processed by cutting, forging and stamping and aperture by aluminum alloy materials such as bar and is formed, including is integrally formed
Air tank head mounting portion 11, reflux portion 12, valve body interconnecting piece 13, flow control division 14 and base portion 15.It need to be noted that
It is that valve body 10 is integrally formed by the aluminum alloy materials of monolith and is made, therefore the various pieces of valve body 10 are all connected
, wherein fitted together again with other parts after being a separately formed there is no any part.Below for valve body 10
Detailed construction introduce in, sometimes for statement intuitive and text it is succinct, valve body 10 certain may be described with " connection "
Relationship between a little parts refers to there is part area between the different piece of valve body 10 when still " connection " is used in these occasions
Domain is mutually connected from beginning to end, is not meant between certain parts of valve body 10 originally independently of each other, using it
He fits together connection means.
Air tank head mounting portion 11 is formed in 10 top of valve body, is generally shaped like cylinder, the axial length with valve body 10
Direction (i.e. Z-direction shown in Fig. 1) is consistent.The center of the air tank head mounting portion 11 axially offers cylindrical the
One mounting hole 111, first mounting hole 111 top (the namely top of valve body 10 open at one end in air tank head mounting portion 11
End), the other end runs through entire air tank head mounting portion 11, and extends in the reflux portion 12 connecting with air tank head mounting portion 11.It should
The internal partial wall internal diameter close to 10 top of valve body of first mounting hole 111 expands and is formed the first seal groove 112 of annular.It is corresponding
Annular step surface 113 is formed with inside the bottom of first mounting groove 112, air tank head mounting portion 11, outside the step surface 113
Enclose the second seal groove 114 that annular is gone down and formed to part (i.e. close to the part of 11 inner wall of air tank head mounting portion) recess.Also
It is to say, which is provided with the bottom of the first seal groove 112, and it is big to collectively form cross section with the first seal groove 112
It causes to be L-shaped compound seal slot.
The generally hollow cylindrical shape in reflux portion 12, is arranged axially along Y direction shown in Fig. 1, with valve body 10
Length direction it is vertical or substantially vertical, center axially offers cylindrical return flow line 121；The two of the reflux portion 12
Side convexes to form the convex surface of substantially semi-cylindrical respectively, and the protrusion direction on two convex surfaces is X-axis side shown in Fig. 1 respectively
To positively and negatively, the axial direction on two convex surfaces is then parallel with Y direction shown in Fig. 1.Air tank head mounting portion 11
Bottom end (i.e. the one end of air tank head mounting portion 11 towards 10 bottom end of valve body) on 12 outer surface of reflux portion towards 10 top of valve body
The partial region of side be connected.The second cylindrical mounting hole is also offered to perforation on the side wall in the reflux portion 12
122, the internal diameter of the internal diameter of second mounting hole 122 less than the first mounting hole 111, and the first mounting hole 111 and the second mounting hole
122 are coaxially mutually aligned, the top (i.e. towards the one end on 10 top of valve body) of the second mounting hole 122 and the first mounting hole 111
The one end for protruding into reflux portion 12 is interconnected, the bottom end (i.e. towards one end of 10 bottom end of valve body) of the second mounting hole 122 and reflux
Channel 121 is connected to.The both ends bore of return flow line 121 expands, and is respectively formed the first pipe for connecting fluid conveyance conduit
The shape of interconnecting piece 123 and second pipe interconnecting piece 124, the first pipe interconnecting piece 123 and second pipe interconnecting piece 124 is big
Cause flare.It is also opened up on the inner wall of the other side opposite with the side for being connected with air tank head mounting portion 11 in reflux portion 12
There is cylindrical third mounting hole 125, the internal diameter of the third mounting hole 125 and the second mounting hole 122 are equal or roughly equal,
And it is coaxially mutually aligned across return flow line 121 and the second mounting hole 122.
Valve body interconnecting piece 13 includes interconnecting piece main body 131, which includes the top towards 10 top of valve body
Portion, bottom and connection two sides and two end faces between the top and the bottom towards 10 bottom end of valve body, two sides
Face and two end faces are plane or generally planar, wherein be parallel to each other between a side or substantially parallel, two end faces it
Between be parallel to each other or substantially parallel, either side and either end facet are then mutually perpendicular to or generally perpendicularly intersect.
The top of the interconnecting piece main body 131 and the side for offering third mounting hole 125 in reflux portion 12 are (i.e. backwards to gas
The side of case head mounting portion 11) be connected, the length in reflux portion 12 be greater than between two end faces of interconnecting piece main body 131 away from
From, therefore the both ends in reflux portion 12 are crossed two end faces of valve body interconnecting piece 13 respectively and are stretched out；And the diameter in reflux portion 12 is big
In the distance between two sides of interconnecting piece main body 131 so that the above-mentioned convex surface that convexes to form of 12 two sides of reflux portion relative to
Two sides of interconnecting piece main body 131 are protrusions.The of protrusion is formed at least one side of the interconnecting piece main body 131
One department of assembly 132, the shape of first department of assembly 132 are semicylinder or substantially semicylinder, axial with reflux portion 12
Axial direction it is parallel or substantially parallel (i.e. parallel or substantially parallel with Y axis direction shown in FIG. 1).As shown in Figure 1, the first assembly
Two end faces in portion 132 are respectively (being in the same plane) concordant with two end faces of interconnecting piece main body 131, that is to say, that
The axial length of first department of assembly 132 is equal with the distance between two end faces of interconnecting piece main body 131, is shown in FIG. 1
Distance L2.Distance L2 is less than the axial length L 1 in reflux portion 12.In this way when being opened to manufacture the valve body 10, it can incite somebody to action
The shape of mold is designed more regular, simplifies manufacturing process.The central part of first department of assembly 132 axially offers perforation
The first pilot hole 132a at its both ends.The second department of assembly 133 of protrusion is formed on one end face of interconnecting piece main body 131, it should
The shape of second department of assembly 133 be it is cylindrical or substantially cylindrical, it is axial also with reflux portion 12 it is axial it is parallel (i.e. with figure
Y direction shown in 1 is parallel), one end is vertically connected on the end face of interconnecting piece main body 131, and the other end is to outside valve body 10
Side is stretched out.The central part of second department of assembly 133 axially offers the second pilot hole 133a, which is to open
Mouth is in 133 end of the second department of assembly and the screw connection structure of the blind hole being internally threaded or other non through hole.This first
Pilot hole 132a and the second pilot hole 133a can be used for the installation parts such as bolt corresponding with shape, rivet cooperation, to valve body 10 into
Row limit, by the valve body 10 be fixedly fitted in automotive air-conditioning system or other use environments in.
The inside of interconnecting piece main body 131 is also provided with the 4th mounting hole 134, the upper boom set gradually from its top to bottom
Hole 135 and lower rod aperture 136.4th mounting hole 134, upper rod aperture 135 and lower rod aperture 136 are cylindrical hole, wherein the 4th
The internal diameter of mounting hole 134 is less than the internal diameter of third mounting hole 125, the top of valve body interconnecting piece 13 is opened on, with third mounting hole
125 are coaxially connected to；The internal diameter of upper rod aperture 135 less than the 4th mounting hole 134 internal diameter, and coaxially with the 4th mounting hole 134
Connection；The internal diameter of lower rod aperture 136 is less than the internal diameter of upper rod aperture 135, is coaxially connected to upper rod aperture 135, and is opened on valve body company
The bottom of socket part 13.
Flow control division 14 includes the first throughput 141 and the second throughput 142, first throughput 141 and second
The shape in logical portion 142 is substantially cylindrical, and their axial direction is parallel or substantially parallel (i.e. with the axial direction in reflux portion 12
It is parallel or substantially parallel with Y direction shown in FIG. 1).First throughput 141 towards 10 top of valve body side partial region
It is connected with the bottom of valve body interconnecting piece 13, the end face of 141 one end of the first throughput and an end face of valve body interconnecting piece 131
In same plane, and one of the partial region of the end face of first throughput 141 and 142 one end of the second throughput
Point end face is connected, and the other end of the first throughput 141 then crosses another end face of valve body interconnecting piece 131 and to valve body
10 outsides are stretched out.The two sides of first throughput 141 and the two sides of the second throughput 142 are all convexed to form close to the convex of semi-cylindrical
Face, the protrusion direction on two convex surfaces which forms are the positive and negative of X-direction shown in Fig. 1 respectively
To the protrusion direction on two convex surfaces that the second throughput 142 is formed also is the positive and negative of X-direction shown in Fig. 1 respectively
To, and the axial direction on the convex surface of the first throughput 141 and the formation of the second throughput 142 is parallel with Y direction shown in Fig. 1.
The diameter of first throughput 141 is greater than the distance between two sides of interconnecting piece main body 131, so that 141 liang of the first throughput
The above-mentioned convex surface that side convexes to form is protrusion relative to two sides of interconnecting piece main body 131.It is opened up in first throughput 141
There is the first recirculation hole 143, which is the axially extending stepped hole along the first throughput 141 comprising the
In hole portion 143b in one outer hole portion 143a and first, the first outer hole portion 143a and first hole portion 143b be cylindrical hole and
It is coaxially interconnected, the internal diameter of the first outer hole portion 143a is greater than the internal diameter of hole portion 143b in first.Wherein, hole portion in first
143b is arranged inside the first throughput 141, and lower rod aperture 136 is from 13 internal stretch of valve body interconnecting piece to the first throughput 141
In, and be connected to the side on hole portion 143b in first towards 10 top of valve body.Hole portion is arranged in first in first outer hole portion 143a
On the outside of 143b, one end is coaxially connected to hole portion 143b in first, and the other end is in the first throughput 141 to stretching on the outside of valve body 10
Opening is formed on one end out.In the present embodiment, the first outer hole portion 143a be formed by the diameter of the opening relative to
The diameter further expansion of the other parts of the first outer hole portion 143a, it is formation substantially flare, defeated for connecting fluid
Send the third pipe connection portion 143c of pipeline.
In present embodiment, 123 end of end face and first pipe interconnecting piece of the end third pipe connection portion 143c
End face is in the same plane, that is to say, that the end face of described 121 one end of reflux portion and 141 end of the first throughput
End face is concordant (being in the same plane).In this way when being opened to manufacture the valve body 10, the shape of mold can be set
It counts more regular, simplifies manufacturing process.First throughput 141 is also provided with the valve opening 145 for adjusting fluid flow.It should
Valve opening 145 is cylindrical hole, is interconnected with the other side towards 10 bottom end of valve body of the hole portion 143b in first, and
Hole portion 143b is coaxially mutually aligned in first with lower rod aperture 136.
As described above, the portion end surface (portion end surface being located above in figure) and first of 142 one end of the second throughput
The partial region of one end face of throughput 141 is connected, and the other end of the second throughput 142 is then to 10 outside of valve body
Extend, the extending direction of extending direction and the first throughput 141 is on the contrary, i.e. the first throughput 141 and the second throughput 142 are divided
It does not extend out from the opposite sides of valve body 10.The second recirculation hole 144 is offered in second throughput 142, second recirculation hole
144 is along the axially extending stepped holes of the second throughput 142 comprising hole portion in the second outer hole portion 144a and second
Hole portion 144b is cylindrical hole and is coaxially interconnected in 144b, the second outer hole portion 144a and second, the second exit orifice
The internal diameter of portion 144a is greater than the internal diameter of hole portion 144b in second.Wherein, hole portion 144b is arranged in the second throughput 142 in second
Portion, the second outer hole portion 144a setting is in second on the outside of hole portion 144b, and one end is coaxially connected to hole portion 144b in second, separately
One end forms opening on the one end stretched out on the outside of valve body 10 in the second throughput 142.In the present embodiment, second exit orifice
Portion 144a is formed by the diameter further expansion of the diameter of the opening relative to the other parts of the second outer hole portion 144a, shape
4th pipe connection portion 144c at substantially flare, for connecting fluid conveyance conduit.In present embodiment, the 4th
133 end of end face and the second department of assembly of 124 end of end face and second pipe interconnecting piece of the end pipe connection portion 144c
End face is in the same plane, that is to say, that the end face of described 121 one end of reflux portion and 142 end of the second throughput
The end face of end face and 133 end of the second department of assembly is concordant (being in the same plane).In this way for manufacture the valve body 10
When being opened, the shape of mold can be designed to more regular, simplify manufacturing process.
Base portion 15 is generally cylindrical, it is axial it is consistent with the length direction of valve body 10 (i.e. with Z axis shown in Fig. 1
Direction is consistent), top (i.e. towards the one end on 10 top of valve body) is with the first throughput 141 backwards to the one of interconnecting piece main body 131
The partial region of side (i.e. towards the side of 10 bottom end of valve body) is connected, and the second throughput 142 connects with the first throughput 141
The partial region of the side of another part end face (being underlying portion end surface in figure) and the base portion 15 of the one end connect
It is connected；The bottom end of base portion 15 is exactly the bottom end of valve body 10.Valve chamber 151 is offered in base portion 15, which is
Longitudinally disposed cylindrical step hole, axial, cylinder including multiple coaxial communications consistent with the length direction of valve body 10
Hole section.Along the direction from the top of valve body 10 to the bottom end of valve body 10, the diameter of each hole section be it is incremented by successively, it is most lower
Side, that is, the maximum hole section of diameter is formed in 151 bottom end of base portion and is open.The top of valve chamber 151 is (i.e. towards 10 top of valve body
One end) extend in the first throughput 141, and be coaxially connected to valve opening 145.Hole portion in the second of second recirculation hole 144
144b is then extended in the base portion 15, and is connected to the side of valve chamber 151.
The above is only the contour structures of the valve body of the heating power expansion valve of an embodiment of the invention, and there is no right
Concrete shape, size and the structural relation of all parts of the valve body of heating power expansion valve of the invention limit.At it
In his embodiment, air tank head mounting portion 11, reflux portion 12, valve body interconnecting piece 13, the first throughput 141, the second throughput 142
And concrete shape, size and the structural relation of base portion 15 may all have certain variation.For example, in present embodiment
The first pipe interconnecting piece 123 and second pipe interconnecting piece 124 formed at the both ends open of return flow line 121 is to be mutually aligned
Both, but may also not be mutually aligned both in other embodiments and be arranged to other positions relationship, such as
Towards the angle that can be mutually perpendicular to or be formed other angles, and the concrete shape in reflux portion 12 can also make adaptation therewith
The change of property.Similarly, the first throughput 141 is axial axial other than being parallel to each other with the second throughput 142, can also
To be arranged to other positions relationship, such as it is mutually perpendicular to or is formed the angle of other angles.Second throughput 142 is in the longitudinal direction
Position can be more nearly the bottom end of valve body 10, one end can be fully connected on the outer peripheral surface of base portion 15 (i.e. end
Whole end faces be all connected with the partial region of the outer peripheral surface of base portion 15), and it is complete with the end of the first throughput 141
It is staggered, i.e., the end of the second throughput 142 is not necessarily intended to directly be connected with the end of the first throughput 141, but makes
Two throughputs 142 fully rather than partly extend out from base portion 15.First department of assembly 132 can also be not formed in
On one end face of interconnecting piece main body 131, and it is formed on the end face of first-class 141 one end of logical portion.Present embodiment indsole
The distance between two end faces of the diameters of portions 15 and interconnecting piece main body 131 (i.e. above-mentioned L2) and the first department of assembly 132
(i.e. above-mentioned L2) is roughly equal for the distance between two end faces, and in other embodiments, the diameter of base portion 15 can also
To be greater than the distance between two end faces (i.e. above-mentioned L2) and two end faces of the first department of assembly 132 of interconnecting piece main body 131
The distance between (i.e. above-mentioned L2).
Air tank head 20 includes main part 21 and socket part 22, wherein most of feature of main part 21 and existing air tank head
Pressure-actuated diaphragm that is similar, being internally provided with thermal expansion medium and generated when can be by thermal expansion media expansion.Main part
21 shell protrudes to form socket part 22, which is cylindrical shape, and outer peripheral wall is smooth cylindrical surface, and internal diameter
It is corresponding with the internal diameter of the first mounting hole 111, it can be inserted in the first mounting hole 111, and in the way of such as being threadedly coupled
It is fixed in the first mounting hole 111.Main part 21 is connected to by the first mounting hole 111 with return flow line 121.The air tank head 20 is used
In the temperature of the evaporator outlet of sensing automotive air-conditioning system, medium therein can generate corresponding journey according to the temperature sensed
The thermal expansion of degree drives its diaphragm mobile, generates pressure to the valve rod 30 connecting with air tank head 20, valve rod is made to exist by thermal expansion
It pushes spool 40 mobile under the driving of the pressure, to adjust the aperture of valve opening 145, achievees the effect that adjusting refrigerant flow rate.
Valve rod 30 includes upper drive rod 31 and underdrive bar 33.Support or be fixed on air tank head 20 in one end of upper drive rod 31
Main part 21 bottom, shaft passes through socket part 22, the first mounting hole 111, return flow line 121, the second mounting hole 122 and the
Three mounting holes 125, the other end then protrude into rod aperture 135.The diameter of underdrive bar 33 is not more than the internal diameter of lower rod aperture 136, can
It is axially movably set in lower rod aperture 136, one end that one end protrudes into upper rod aperture 135 with upper drive rod 31 is coaxially mutually supported
Hold, the other end along with first in the axially vertical direction of hole portion 143b pass through hole portion 143b in first, and protrude into valve opening 145
In.
Spool 40 is in the present embodiment steel ball, is placed in valve chamber 151 and is aligned valve opening 145, underdrive bar 53
It protrudes into one end alignment spool 70 of valve opening 145 and supports on spool 70.The shape and size and valve opening 145 of spool 40 are opposite
It answers, the aperture of adjustable valve opening 145 when being moved axially relative to valve opening 145.
Regulating mechanism 50 includes adjustment seat 51, the first spring 52, valve core frame 53 and second spring 54.Adjustment seat 51 is substantially
With the round table-like of stairstepping outer peripheral surface, closest to 10 bottom end of valve body and the maximum a part of outer peripheral surface of diameter and valve
Room 151 close to 10 bottom end of valve body and the maximum a part of inner wall of internal diameter cooperated using the mode such as being threadedly coupled
It is fixed, make adjustment seat 51 fixedly and height is adjustably assemblied on valve body 10.51 center of adjustment seat is offered adjusts for accommodating
Save the spring eye 51a of spring 52.First spring 52 be cylindrical helical spring, be placed between adjustment seat 51 and spool 40 and
It is radially limited in spring eye 51a, can flexibly stretch along longitudinal direction.Valve core frame 53 is generally cylindrical, and is placed in the first bullet
Between spring 52 and spool 40, one end coaxially covers in the first spring 52, the other end from 52 top of the first spring stretch out and
Surrounding forms the flange that a loop diameter is greater than 52 internal diameter of the first spring, prevents valve core frame 53 from falling into inside the first spring 52.Second
Spring 54 is butterfly spring, and top is fixed on 53 periphery of valve core frame, and the alar part at edge is supported on 151 inner wall of valve chamber, is used for
The position of valve core frame 53 is maintained to the center of valve chamber 151, prevents valve core frame 53 from shifting.Spool 40 is clamped in valve core frame
53 one end stretched out from 52 top of the first spring and underdrive bar 33 protrude between one end of valve opening 145.When in air tank head 20
When medium does not generate the thermal expansion of sufficient degree, the elastic force of the first spring 52 can drive valve core frame 53, spool 40 and valve rod 30
It is all moved upward, makes spool 40 closer to valve opening 145, reduce the orifice size of valve opening 145, pass through valve opening to reduce
145 refrigerant flow.
In addition, the heating power expansion valve 100 further includes reflux portion sealing ring 91, tabletting 92, upper rod aperture sealing ring 93 and valve chamber
Sealing ring 94.Reflux portion sealing ring 91 is using elastic material O-ring as made of rubber, and section is generally L-shaped, and upper
Shape and the size for stating the compound seal slot that the first seal groove 112 and the second seal groove 114 are constituted are corresponding.Reflux portion sealing
Circle 91 is set on the external circumferential surface of insertion section 22 of the first mounting hole 111 of insertion in the compound seal slot,
Between the outer surface of insertion section 22 and the inner surface of air tank head mounting portion 11 formed interference fit, air tank head 20 can be subject into
The fixation of one step, and prevent the refrigerant in return flow line 121 from leaking out from the first mounting hole 111.Tabletting 92 is to use
The thin rounded flakes that metal material is made of such as copper, diameter is corresponding to 125 diameter of third mounting hole, central then to offer diameter not small
In the through-hole (in figure unlabeled) of upper 31 diameter of drive rod.The tabletting 92 is fixed in third mounting hole 125, upper drive rod 31 from
It is passed through in the through-hole that 92 center of tabletting opens up.Upper rod aperture sealing ring 93 is also to use elastic material O-ring as made of rubber,
In the case where not deforming, outer diameter of rod aperture sealing ring 93 is slightly larger than the diameter of upper rod aperture 135 on this, and internal diameter is then slightly less than
The diameter of drive rod 31.Rod aperture sealing ring 93 is placed in the 4th mounting hole 134 and is limited by tabletting 92 on this, and rod aperture is close on this
Seal 92 is fitted snugly on drive rod 31, and outer periphery is closely pressed on 134 inner wall of the 4th mounting hole, i.e., upper
Interference fit is formed between drive rod 31 and the inner wall of the 4th mounting hole 134, under preventing the refrigerant in valve chamber 151 from passing through
Rod aperture 136 and upper rod aperture 135 leak out.Valve chamber sealing ring 94 is also to be using elastic material O-ring as made of rubber,
It is set on the lesser outer peripheral surface of a part of diameter of adjustment seat 51 (for example, it may be embedded in being provided with outside adjustment seat 51
In annular groove on circumferential surface), and interference fit is formed between adjustment seat 51 and the inner wall of valve chamber 151, for preventing valve chamber
Refrigerant in 151 is leaked out from 10 bottom end of valve body.
In use, the second recirculation hole 144 of the heating power expansion valve 100 passes through the refrigeration of condenser output channel and condenser
Agent outlet, the first recirculation hole 143 are connected to by evaporator input channel with the refrigerant inlet of evaporator.First pipe connects
Socket part 123 is connected to by evaporator output tube road with the refrigerant inlet of evaporator, and second pipe interconnecting piece 124 passes through compressor
Input channel is connected to the refrigerant outlet of compressor.The heating power expansion valve 100 at work, come the refrigerant of condenser from
Second recirculation hole 144 is passed through valve chamber 151, if the position where spool 40 does not completely close valve opening 151 at this time, refrigerant
Evaporator is transported to for freezing by valve opening 151 and the first recirculation hole 143.For freeze after the raised refrigerant of temperature from
It is discharged in evaporator, flows back to compressor by second pipe interconnecting piece 124, return flow line 121 and first pipe interconnecting piece 123
For being recycled.When the raised refrigerant of temperature after use flows through return flow line 121, it can also pass through the second mounting hole 112
The main part 21 of air tank head 20 is touched with the first mounting hole 111.Main part 21 sense refrigerant temperature or temperature and
After the operating conditions such as pressure, medium therein generates corresponding thermal expansion according to the operating condition sensed, by thermally expanding to valve rod 30
Upper drive rod 31 generates pressure, and upper drive rod 31 pushes underdrive bar 33 and spool 40 axially to move under the driving of the pressure
It is dynamic, to adjust the aperture of valve opening 145, further adjust the refrigerant flow for passing through valve opening 145.It is appreciated that working as evaporator
Refrigeration effect it is poor when, the refrigerant temperature of reflux will increase, and the degree of thermal expansion that air tank head 20 generates at this time will be compared with
Greatly, 30 entirety of valve rod can be pushed down on bigger amplitude, by the top of spool 40 downwards and far from valve opening 145, to expand valve
The aperture in hole 145 causes the refrigerant flow for flowing into evaporator to increase, enhances refrigeration effect.If the refrigeration effect of evaporator
Very strong, the thermic load of air-conditioning system reduces, then the refrigerant temperature to flow back will reduce, so that the heat that air tank head 20 generates
Degrees of expansion becomes smaller, and the amplitude that valve rod 30 moves down reduces, and adjustment spring 52 can be sprung back at this time, spool 40 is pushed up again upwards
Side reduces the aperture of valve opening 145, and the refrigerant flow for flowing into evaporator reduces.
According to the different installation requirements of valve body 10, above-mentioned first department of assembly 132 and/or the second department of assembly 133 can also be with
It is omitted or makes on specific structure change.For example, in the heating power expansion valve that embodiment shown in Fig. 4 provides, the
Two departments of assembly 133 are omitted.In the heating power expansion valve that embodiment shown in Fig. 5 provides, at least one first department of assembly 132
The first mounting hole 132a in addition on two end faces in first department of assembly 132 have opening other than, also in the first department of assembly
Also the linear opening 132b parallel with the axial direction of the first department of assembly 132 is formed on 132 side, so that the first department of assembly 132
Radial section be generally shaped like C-shaped.Alternatively, it is also possible to which with the groove being provided on 132 side of the first department of assembly, (figure is not
Show) replace the first mounting hole 132a, the shape of the groove can be along the first department of assembly 132 axially extending V-shaped groove (i.e.
Its cross section is substantially in up-side down triangle), both ends form opening on two end faces of the first department of assembly 132 respectively, so that the
The radial cross-sectional shape of one department of assembly 132 is substantially v-shaped.In the heating power expansion valve that embodiment shown in Fig. 6 provides, valve body
Interconnecting piece 131 further includes the reinforcing rib 133b of longitudinally disposed plate, and reinforcing rib 133b is connected under the second department of assembly 133
Between side and the upside of the second throughput 142 and downside of the upside of the second department of assembly 133 and second pipe access section 124
Between, in multiple protrusion parts of valve body 10 (the second department of assembly 133 as escribed above, the second throughput 142 and second
Pipeline access section 124) between provide connection and support, help to improve the overall structural strength of valve body 10.In addition, first-class
Longitudinal plate reinforcing rib 133b also can be set between logical portion 141 and first pipe access section 143b, in the first circulation
Connection and support are provided between portion 141 and first pipe access section 143b, further increase the overall structural strength of valve body 10.
It is appreciated that the first department of assembly 132 and/or the second department of assembly 133 provided by these above-mentioned embodiments is each
The specific structural features that kind changes can be respectively set in various embodiments, can also entirely or partly be arranged simultaneously
In the same embodiment.For example, in the heating power expansion valve that embodiment shown in Fig. 7 provides, 133 quilt of the second department of assembly
It omits, 132 the first mounting hole 132a of at least one the first department of assembly is formed and first on the side of the first department of assembly 132
The parallel linear opening 132b of the axial direction of department of assembly 132, and the upside of the second throughput 142 and second pipe access section 124
Downside between by longitudinally disposed plate reinforcing rib 133b connection.That is, the heating power expansion valve contains simultaneously
State the structure feature of the heating power expansion valve of three embodiments shown in Fig. 4-6.
In other embodiment of the invention, valve body interconnecting piece 13 can also use other structures.For example, scheming
In the heating power expansion valve that embodiment shown in 8 provides, the outer shape of interconnecting piece main body 131 not substantially cuboid, and
It is substantially cylindrical, diameter of the diameter less than base portion 15.The axial direction of valve body interconnecting piece 131 and the axial direction in reflux portion 12 are hung down
Straight or substantially vertical, top is connected with the partial region of the lower middle side part in reflux portion 12, bottom and the first throughput 141
The partial region of upside be connected.Second department of assembly 133 from the side of valve body interconnecting piece 131 along with reflux portion 12 and
The direction that the axial direction of two throughputs 142 is parallel extends out, and the first department of assembly 132 is then omitted.Second department of assembly 133
Between downside and the upside of the second throughput 142, the downside of the upside of the second department of assembly 133 and second pipe access section 124 it
Between and the first throughput 141 and first pipe access section 143b between the reinforcing rib of longitudinally connected plate can be set
133b.In addition, second department of assembly 133 can also be omitted, i.e., it is similar with above-mentioned embodiment shown in Fig. 7, it will longitudinally set
The reinforcing rib 133b for the plate set be connected directly between the second throughput 142 upside and second pipe access section 124 downside it
Between.
Compared with prior art, heating power expansion valve 100 provided by the invention is by cutting aluminium bar material or aluminium alloy bar
After forming valve body blank, then forging and stamping and aperture are carried out to valve body blank and form its valve body.Since valve body blank is using forging and stamping
Mode is formed, therefore required complicated shape directly can be all forged and pressed out in all directions of valve body blank, without as existing
Some forms biggish plane in valve body blank two sides by the way that the method for cutting profile formation valve body blank is the same.With the prior art
It compares, the valve body profile of heating power expansion valve provided by the invention is more accurate, and can have smaller volume and weight.
It should be noted that：Above embodiments are merely to illustrate the present invention and not limit technical side described in the invention
Case, although this specification is referring to the above embodiments, the present invention has been described in detail, the common skill of this field
Art personnel should be appreciated that person of ordinary skill in the field still can modify or equivalently replace the present invention, and
All do not depart from the technical solution and its improvement of the spirit and scope of the present invention, should all cover in scope of the presently claimed invention
It is interior.
Claims (11)
1. a kind of heating power expansion valve, including air tank head, valve rod, spool and valve body；It is characterized in that：The valve body is by aluminium alloy
Material is formed by forging process, and including in the air tank head mounting portion of integral structure, reflux portion, valve body interconnecting piece, stream
Measure adjustment portion and base portion；The valve body interconnecting piece includes interconnecting piece main body, and the air tank head mounting portion is arranged in the reflux
The other side backwards to the air tank head mounting portion in the reflux portion, the company is arranged in the side in portion, the interconnecting piece main body
Socket part main body includes two opposite end faces being connected between the top and bottom of the interconnecting piece main body, the reflux portion
Length is greater than the distance between two end faces of the interconnecting piece main body, and the flow control division includes the first throughput and second
The side backwards to the reflux portion of the interconnecting piece main body is arranged in throughput, first throughput, and the base portion is set
Set the side in first throughput backwards to the interconnecting piece main body, second throughput from the base portion or
It partly extends out from the base portion, second throughput is prolonged with the axial direction in the substantially parallel reflux portion
It stretches, and in the length direction of the valve body, the bottom position of second throughput is higher than the bottom position of the base portion；Its
Described in valve opening is offered between the first throughput and the second throughput, first throughput is offered to be connected to the valve opening
The first recirculation hole, second throughput offers the second recirculation hole being connected to the valve opening；The reflux portion is provided with
Return flow line, the air tank head mounting portion are provided with the first mounting hole being connected to the return flow line；The air tank head and institute
It states air tank head mounting portion to be arranged relatively fixedly, the valve rod and spool are mounted on the valve inner, and the spool is directed at institute
Valve opening setting is stated, the valve rod passes through the reflux portion and valve body interconnecting piece, and institute is supported or be fixed in one end of the valve rod
It states on air tank head, the other end is directed at the spool；The heating power expansion valve is using the air tank head via first mounting hole
The fluid condition inside the return flow line is sensed, is made inside the air tank head according to the fluid condition that the air tank head senses
Medium harmomegathus occur to change the position of the valve rod and spool relative to the valve opening adjust the aperture of the valve opening,
And then adjust the flow that the fluid of the valve body is flowed through by first recirculation hole, valve opening and the second recirculation hole.
2. heating power expansion valve as described in claim 1, it is characterised in that：The air tank head is mounted on the air tank head mounting portion
It above and is partly accommodated in first mounting hole, the valve body is arranged in its base portion and from the inside part of base portion
There is valve chamber, the valve chamber is connected to second recirculation hole；The heating power expansion valve further includes regulating mechanism, and the spool is at least
It is partially provided in the valve chamber, the regulating mechanism is mounted in the valve chamber, provides the spool towards the valve
The elastic force of the end face of bar one end.
3. heating power expansion valve as claimed in claim 1 or 2, it is characterised in that：The air tank head mounting portion and the reflux portion
Shape substantially circular ring shape or cylindrical shape, one end of the air tank head mounting portion and the partial region of reflux portion side
It is connected, the part of the other side backwards to the air tank head mounting portion in the top of the interconnecting piece main body and the reflux portion
Surface is connected；The shape of first throughput and the second throughput is substantially cylindrical, first throughput
The partial region of side is connected with the bottom of the interconnecting piece main body；The base portion it is generally cylindrical in shape,
The partial region of one end and the side backwards to the interconnecting piece main body of first throughput is connected；Second circulation
A part of the one end in portion is connected with a part of first throughput one end, and the end of second throughput is another
Part is connected with a part of the outer peripheral surface of the base portion；Or the end of second throughput and the base portion
A part of outer peripheral surface be connected；The axial direction in the reflux portion, the first throughput and the second throughput is parallel to each other or greatly
Cause is parallel to each other, and axially vertical or substantially vertical with the air tank head mounting portion and base portion.
4. heating power expansion valve as claimed in claim 3, it is characterised in that：The interconnecting piece main body includes being connected to the connection
Two opposite sides between the top and bottom of portion's main body；The distance between two end faces of the interconnecting piece main body and institute
State base portion diameter is roughly equal or diameter less than the base portion；The surface in the reflux portion and first circulation
The surface in portion, which is all formed with, is respectively relative to described two side surfaces protrusions, is generally shaped like the convex surface of semi-cylindrical.
5. heating power expansion valve as claimed in claim 4, it is characterised in that：The valve body interconnecting piece further includes being used for and installation part
Cooperation, the first department of assembly that the heating power expansion valve is limited；Being generally shaped like of first department of assembly is provided with logical
The semicylinder in hole or the radial section of the first department of assembly are generally shaped like C-shaped or V-arrangement；First department of assembly projection
In at least one described side of the interconnecting piece main body, and the axial direction of first department of assembly and the reflux portion, first
The axial direction of throughput and the second throughput is parallel or substantially parallel.
6. heating power expansion valve as claimed in claim 1 or 2, it is characterised in that：The interconnecting piece main body is described including being connected to
Two opposite sides between the top and bottom of interconnecting piece main body；The valve body interconnecting piece further includes for matching with installation part
It closes, the first department of assembly that the heating power expansion valve is limited；Being generally shaped like for first department of assembly is provided with through-hole
Semicylinder or the radial section of the first department of assembly be generally shaped like C-shaped or V-arrangement；First department of assembly is convexly equipped in
On at least one described side of the interconnecting piece main body, and it is the axial direction of first department of assembly and the reflux portion, first-class
The axial direction of logical portion and the second throughput is parallel or substantially parallel.
7. heating power expansion valve as claimed in claim 5, it is characterised in that：The valve body interconnecting piece further includes being used for and installation part
Cooperation, the second department of assembly that the heating power expansion valve is limited；The outer shape of second department of assembly is substantially cylindrical
Shape is outwardly protruded from the side of the valve body, axial parallel or substantially parallel with the axial direction in the reflux portion, and described second
Department of assembly is provided with the screw connection structure of non through hole.
8. heating power expansion valve as claimed in claim 5, it is characterised in that：The valve body interconnecting piece further includes being connected to described
Reinforcing rib between one throughput and the reflux portion and/or be connected between second throughput and the reflux portion plus
Strengthening tendons.
9. heating power expansion valve as claimed in claim 3, it is characterised in that：The interconnecting piece main body is generally shaped like cylinder
Shape, it is axial axially vertical with the reflux portion, both ends respectively with the partial region of reflux portion side and described the
The partial region of one throughput side is connected.
10. heating power expansion valve as claimed in claim 9, it is characterised in that：The valve body interconnecting piece further include for installation
Part cooperation, the department of assembly that the heating power expansion valve is limited；The outer shape of the department of assembly is substantially cylindrical, from institute
The side for stating valve body outwardly protrudes, axial parallel or substantially parallel with the axial direction in the reflux portion, and the department of assembly is arranged
There is the screw connection structure of non through hole.
11. the heating power expansion valve as described in claim 9 or 10, it is characterised in that：The valve body interconnecting piece further includes being connected to
Reinforcing rib between first throughput and the reflux portion and/or be connected to second throughput and the reflux portion it
Between reinforcing rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410589420.8A CN105626922B (en) | 2014-10-28 | 2014-10-28 | Heating power expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410589420.8A CN105626922B (en) | 2014-10-28 | 2014-10-28 | Heating power expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105626922A CN105626922A (en) | 2016-06-01 |
| CN105626922B true CN105626922B (en) | 2018-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410589420.8A Active CN105626922B (en) | 2014-10-28 | 2014-10-28 | Heating power expansion valve |
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|---|---|---|---|---|
| CN1078028A (en) * | 1992-04-25 | 1993-11-03 | 饶世庆 | Zinc-base high-aluminium alloy angle valve |
| JP2008057949A (en) * | 2006-05-18 | 2008-03-13 | Tgk Co Ltd | Mounting structure of expansion valve |
| CN101726139A (en) * | 2008-10-17 | 2010-06-09 | 浙江三花汽车控制***有限公司 | Thermostatic expansion valve |
| CN103016830A (en) * | 2011-09-28 | 2013-04-03 | 杭州三花研究院有限公司 | Thermal expansion valve |
| CN103994613A (en) * | 2014-05-26 | 2014-08-20 | 浙江春晖智能控制股份有限公司 | Thermal expansion valve |
| CN204226783U (en) * | 2014-10-28 | 2015-03-25 | 浙江三花汽车零部件有限公司 | Heating power expansion valve |
-
2014
- 2014-10-28 CN CN201410589420.8A patent/CN105626922B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078028A (en) * | 1992-04-25 | 1993-11-03 | 饶世庆 | Zinc-base high-aluminium alloy angle valve |
| JP2008057949A (en) * | 2006-05-18 | 2008-03-13 | Tgk Co Ltd | Mounting structure of expansion valve |
| CN101726139A (en) * | 2008-10-17 | 2010-06-09 | 浙江三花汽车控制***有限公司 | Thermostatic expansion valve |
| CN103016830A (en) * | 2011-09-28 | 2013-04-03 | 杭州三花研究院有限公司 | Thermal expansion valve |
| CN103994613A (en) * | 2014-05-26 | 2014-08-20 | 浙江春晖智能控制股份有限公司 | Thermal expansion valve |
| CN204226783U (en) * | 2014-10-28 | 2015-03-25 | 浙江三花汽车零部件有限公司 | Heating power expansion valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105626922A (en) | 2016-06-01 |
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