CN105626922A - TXV (thermostatic expansion valve) - Google Patents

Abstract

The invention provides a TXV (thermostatic expansion valve). An aluminium bar or an aluminium alloy bar is cut, a valve body blank is formed, forging, pressing and trepanning are performed on the valve body blank, and a valve body of the TXV is formed. The valve body blank is formed through forging and pressing, so that required complex shapes can be forged and pressed in all directions of the valve body blank directly, the outline of the blank body of the TXV can be more precise, and the TXV can have smaller size and lower weight.

Description

Heating power expansion valve

[technical field]

The present invention relates to throttling control field, particularly relate to a kind of heating power expansion valve.

[background technology]

Heating power expansion valve (ThermostaticExpansionValve, TXV) it is air-conditioning and the commonly used throttle part of refrigeration plant, the liquid refrigerant carrying out condenser can be throttled and blood pressure lowering by it, and the flow of the cold-producing medium sending into vaporizer from condenser is regulated according to the temperature of evaporator outlet, to adapt to the needs that cooling load is continually changing. The General Principle that refrigerant flow is controlled by heating power expansion valve is: sensed the temperature of evaporator outlet by air tank head, medium in air tank head produces the thermal expansion of degree of correspondence according to the temperature that air tank head senses, the valve rod being connected with air tank head by thermal expansion pair produces pressure, valve rod promotes spool to move under the driving of this pressure, thus regulating the aperture of valve opening, reach the effect of adjusting refrigerant flow rate.

Existing thermal expansion valve manufacturing method is usually the shape such as aluminium section bar adopting strip as raw material, along the direction vertical with the length direction of this section bar, it is cut, using the metal derby that cuts as valve body blank, then on valve body blank, processing is portalled and is and forms the valve body of heating power expansion valve, then the parts such as the air tank head of heating power expansion valve, valve rod, spool, governor motion are assembled on valve body. But, the valve body blank so cut down have at least two relative sides (two cross sections namely formed in valve body blank both sides during cutting) be bigger plane, valve body is so easily made to form the overall structure that exterior contour is comparatively straight, its volume and weight is all relatively larger, thus increasing the manufacturing cost of heating power expansion valve. And, actual manufacture process it may also be desirable to planar section process for further processing bigger on valve body blank, to form the complex shape of more use value, this necessarily makes the manufacturing process of heating power expansion valve more loaded down with trivial details.

Therefore, it is necessary to existing technology is improved, to solve above technical problem.

[summary of the invention]

It is an object of the invention to provide the heating power expansion valve that a kind of volume is less, weight is lighter, manufacture is easier.

For achieving 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, described valve body is formed by forging and pressing processing by aluminum alloy materials, and includes being the air tank head installation portion of integrative-structure, backflow portion, valve body connecting portion, flow control division and base portion, described valve body connecting portion includes connecting portion main body, described air tank head installation portion is arranged on the side in described backflow portion, described connecting portion main body is arranged on the opposite side of the described dorsad air tank head installation portion in described backflow portion, described flow control division includes the first throughput and the second throughput, described first throughput is arranged on the side in the described dorsad backflow portion of described connecting portion main body, described base portion is arranged on the side of the described dorsad connecting portion main body of described first throughput, described second throughput is described base portion or partly extends out described base portion, offering valve opening between wherein said first throughput and the second throughput, described first throughput offers the first-class through hole connected with described valve opening, and described second throughput offers the second through hole connected with described valve opening, described backflow portion is provided with return flow line, and described air tank head installation portion is provided with the first installing hole connected with described return flow line, described air tank head and described air tank head installation portion are arranged with being relatively fixed, described valve rod and spool are arranged on described valve inner, described spool is directed at described valve opening and arranges, the described backflow portion of described valve rod traverse and valve body connecting portion, and one end of described valve rod supports or be fixed on described air tank head, the other end is directed at described spool, described heating power expansion valve utilizes described air tank head to sense the fluid condition within described return flow line via described first installing hole, the medium generation harmomegathus within described air tank head is made according to the fluid condition that described air tank head senses, thus changing described valve rod and the spool position relative to described valve opening, regulate the aperture of described valve opening, and then regulate the flow of the fluid being flow through described valve body by described first-class through hole, valve opening and second through hole.

Described air tank head is arranged on described air tank head installation portion and is partly contained in described first installing hole, and described valve body is provided with valve chamber its base portion and the part inside from base portion, and described valve chamber connects with described second through hole; Described heating power expansion valve also includes governor motion, and described spool is at least partially disposed in described valve chamber, and described governor motion is arranged in described valve chamber, provides the elastic force of end face towards described valve rod one end to described spool.

The shape in described air tank head installation portion and described backflow portion all substantially annular or cylindrical shape, one end of described air tank head installation portion and the subregion of side, described backflow portion are connected, and the part surface of the opposite side of the top of described connecting portion main body and the described dorsad air tank head installation portion in described backflow portion is connected; The shape of described first throughput and the second throughput is all substantially cylindrical, and the subregion of the side of described first throughput is connected with the bottom of described connecting portion main body; Described base portion generally cylindrical in shape, the subregion of the side of the described dorsad connecting portion main body of its one end and described first throughput is connected; The part of one end of described second throughput is connected with the part of first throughput one end, and another part of this end of described second throughput is connected with a part for the outer peripheral face of described base portion; Or this end of described second throughput is connected with a part for the outer peripheral face of described base portion; Axially being parallel to each other or be substantially parallel to each other of described backflow portion, the first throughput and the second throughput, and equal axially vertical or substantially vertical with described air tank head installation portion and base portion.

Two relative sidepieces that described connecting portion main body includes being connected between top and the bottom of described connecting portion main body and two relative end faces; Distance between two end faces of described connecting portion main body is less than the axial length in described backflow portion, and roughly equal with the diameter of described base portion or less than described base portion diameter; The surface in described backflow portion and the surface of described first throughput are all formed and are respectively relative to what said two side surfaces was protruded, are generally shaped like the convex surface of semi-cylindrical.

Described valve body connecting portion also includes for coordinating with installed part, and described heating power expansion valve carries out the first spacing department of assembly; Described first department of assembly is generally shaped like the semicylinder being provided with through hole, or the radial section of the first department of assembly be generally shaped like C shape or V-arrangement; Described first department of assembly is convexly equipped at least one described sidepiece of described connecting portion main body, and axially axially in parallel or almost parallel with described backflow portion, the first throughput and the second throughput of described first department of assembly.

Described valve body connecting portion also includes for coordinating with installed part, and described heating power expansion valve carries out the second spacing department of assembly; The external shape substantially cylindrical of described second department of assembly, outwardly from the side of described valve body, it is axially in parallel or almost parallel with described backflow portion axially, and described second department of assembly is provided with the screw connection structure of non through hole.

Described valve body connecting portion also includes the reinforcement that is connected between described first throughput and described backflow portion and/or is connected to the reinforcement between described second throughput and described backflow portion.

Described connecting portion main body be generally shaped like cylinder, it is axially vertical with described backflow portion axially, and its two ends are connected with the subregion of the subregion of side, described backflow portion and described first throughput side respectively.

Described valve body connecting portion also includes, for coordinating with installed part, described heating power expansion valve being carried out spacing department of assembly; The external shape substantially cylindrical of described department of assembly, outwardly from the side of described valve body, it is axially in parallel or almost parallel with described backflow portion axially, and described department of assembly is provided with the screw connection structure of non through hole.

Described valve body connecting portion also includes the reinforcement that is connected between described first throughput and described backflow portion and/or is connected to the reinforcement between described second throughput and described backflow portion.

Compared with prior art, heating power expansion valve provided by the invention is by after cutting aluminium bar material or aluminium alloy bar and forming valve body blank, then valve body blank is forged and pressed and perforate and form its valve body. Owing to valve body blank adopts forging and stamping mode to be formed, therefore required complicated shape directly can all be forged and pressed out in all directions of valve body blank, without forming bigger plane as the existing method forming valve body blank by cutting section bar in valve body blank both sides. Compared with prior art, the valve body profile of heating power expansion valve provided by the invention is more accurate, and can have less volume and weight.

[accompanying drawing explanation]

Fig. 1 is the schematic perspective view of an embodiment of heating power expansion valve provided by the invention;

Fig. 2 is the internal structure cross-sectional schematic of the heating power expansion valve embodiment shown in Fig. 1;

Fig. 3 is the exploded view of the heating power expansion valve embodiment shown in Fig. 1.

Fig. 4 is the schematic perspective view of second embodiment of heating power expansion valve provided by the invention;

Fig. 5 is the schematic perspective view of the 3rd embodiment of heating power expansion valve provided by the invention;

Fig. 6 is the schematic perspective view of the 4th embodiment of heating power expansion valve provided by the invention;

Fig. 7 is the schematic perspective view of the 5th embodiment of heating power expansion valve provided by the invention;

Fig. 8 is the schematic perspective view of the 6th embodiment of heating power expansion valve provided by the invention.

[detailed description of the invention]

Below in conjunction with the drawings and specific embodiments, the invention will be further described.

Referring to Fig. 1 to Fig. 3, an embodiment of the heating power expansion valve of the present invention provides a kind of heating power expansion valve 100, and this heating power expansion valve 100 includes valve body 10, air tank head 20, valve rod 30, spool 40 and governor motion 50. This heating power expansion valve 100 is applicable to multiple fluid carries out throttling control, in the present embodiment in order to describe more directly perceived, only control and is described in detail being used in automotive air-conditioning system by this heating power expansion valve 100 to cold-producing medium carrying out throttling; But those skilled in the art obviously should be understood that, it is possible to the type of fluid being carried out throttling control by this heating power expansion valve 100 is not limited to cold-producing medium.

The concrete structure of each element above-mentioned, assembly method and using method will be done concrete introduction below. For the ease of describing, from here on the valve body 10 shown in figure is in the end of the top shown in figure and calls top, be in the end of lower section shown in figure and be called bottom; The part being closer to top in valve body 10 is called top, and the part being closer to bottom is called bottom, and the part between top and bottom is called middle part. When the geometrical relationship described between some parts, it is possible to the saying of " substantially vertical " and " almost parallel " can be related to. Hereinafter, " substantially vertical " and " almost parallel " between parts refers to, although substantially not accurate perpendicular and parallel relation of hanging down between parts, if but not past accurate measurement, then its position relationship intuitively with accurate perpendicular and parallel very difficult difference of hanging down, for instance angular deviation is not more than the situation of 1 degree.

Valve body 10 is formed through cutting, forging and stamping and perforate processing by aluminum alloy materials such as bar, including integrated air tank head installation portion 11, backflow portion 12, valve body connecting portion 13, flow control division 14 and base portion 15. It is to be herein pointed out valve body 10 is one-body molded and make by the aluminum alloy materials of monoblock, therefore the various piece of valve body 10 is all connected, and does not wherein have and fits together with other parts after any part is a separately formed again. In below the detailed construction of valve body 10 being introduced, succinct sometimes for the directly perceived of statement and word, " connection " may be used to describe the relation between some part of valve body 10, when " but connection " is used in these occasions, referring to has subregion to be mutually connected from start to finish between the different piece of valve body 10, it is originally separate to be not meant between some part of valve body 10, fits together then through other connection means.

Air tank head installation portion 11 is formed on valve body 10 top, and it is generally shaped like cylinder, axially consistent with the length direction of valve body 10 (i.e. Z-direction shown in Fig. 1). The central authorities of this air tank head installation portion 11 axially offer the first installing hole 111 of cylinder, this the first installing hole 111 one end open is in the top (namely the top of valve body 10) of air tank head installation portion 11, the other end runs through whole air tank head installation portion 11, and extends in the backflow portion 12 being connected with air tank head installation portion 11. The internal partial wall internal diameter close to valve body 10 top of this first installing hole 111 expands and forms the first annular seal groove 112. Bottom corresponding to this first mounting groove 112, air tank head installation portion 11 has been internally formed annular table terrace 113, and periphery (namely near the part of the air tank head installation portion 11 inwall) depression of this step surface 113 is gone down and formed the second annular seal groove 114. It is to say, this second seal groove 114 is opened in the bottom of the first seal groove 112, collectively form, with the first seal groove 112, the compound seal groove that cross section is generally L-shaped.

The cylindrical shape that backflow portion 12 is generally hollow, it is arranged axially along the Y direction shown in Fig. 1, vertical with the length direction of valve body 10 or substantially vertical, and its central authorities axially offer the return flow line 121 of cylinder; The both sides in this backflow portion 12 convex to form the convex surface of substantially semi-cylindrical respectively, the protrusion direction of these two convex surfaces be respectively the X-direction shown in Fig. 1 positively and negatively, this two convex surfaces axially then all parallel with the Y direction shown in Fig. 1. The bottom (namely air tank head installation portion 11 is towards one end of valve body 10 bottom) of air tank head installation portion 11 is connected towards the subregion of the side on valve body 10 top with on backflow portion 12 outer surface. The sidewall in this backflow portion 12 offers the second installing hole 122 of cylinder also throughly, the internal diameter of this second installing hole 122 is less than the internal diameter of the first installing hole 111, and first installing hole 111 and the second installing hole 122 be mutually aligned coaxially, the top (namely towards the one end on valve body 10 top) of the second installing hole 122 and the first installing hole 111 stretch into the one end in backflow portion 12 and are interconnected, and the bottom (namely towards one end of valve body 10 bottom) of the second installing hole 122 connects with return flow line 121. The two ends bore of return flow line 121 expands, and forms the first pipe connection portion 123 and second pipe connecting portion 124 for connecting fluid-transporting tubing, the shape of this first pipe connection portion 123 and second pipe connecting portion 124 all substantially flare respectively. The inwall of the other side relative with the side being connected to air tank head installation portion 11 in backflow portion 12 is further opened with the 3rd installing hole 125 of cylinder, internal diameter and second installing hole 122 of the 3rd installing hole 125 are equal or roughly equal, and are mutually aligned coaxially across return flow line 121 and the second installing hole 122.

Valve body connecting portion 13 includes connecting portion main body 131, this connecting portion main body 131 includes the top towards valve body 10 top, towards the bottom of valve body 10 bottom and connect two sides between the top and the bottom and two end faces, these two sides and two end faces are plane or generally planar, wherein it is parallel to each other or almost parallel between individual side, being parallel to each other or almost parallel between two end faces, either side and either end facet are then mutually perpendicular to or generally perpendicularly intersect.

The side side of air tank head installation portion 11 (namely dorsad) offering the 3rd installing hole 125 in the top of this connecting portion main body 131 and backflow portion 12 is connected, the length in backflow portion 12 is more than the distance between two end faces of connecting portion main body 131, and therefore the two ends in backflow portion 12 are crossed two end faces of valve body connecting portion 13 respectively and stretched out; And the diameter in backflow portion 12 is more than the distance between two sides of connecting portion main body 131 so that the above-mentioned convex surface that both sides, backflow portion 12 convex to form is protrude relative to two sides of connecting portion main body 131. At least one side of this connecting portion main body 131 is formed the first department of assembly 132 of protrusion, this the first department of assembly 132 is shaped as semicylinder or substantially semicylinder, and it is axially and axially in parallel or almost parallel (namely parallel or substantially parallel with the Y direction shown in Fig. 1) in backflow portion 12. As shown in Figure 1, two end faces of the first department of assembly 132 are concordant with the two of connecting portion main body 131 end faces (in being namely generally aligned in the same plane) respectively, that is, distance between the axial length of the first department of assembly 132 with the two of connecting portion main body 131 end faces is equal, is the distance L2 shown in Fig. 1. This distance L2 is less than the axial length L 1 in backflow portion 12. So when carrying out die sinking for this valve body 10 of manufacture, it is possible to the shape of mould is designed to comparatively rule, simplifies manufacturing process. The core of the first department of assembly 132 axially offers the first pilot hole 132a at its two ends through. One end face of connecting portion main body 131 is formed the second department of assembly 133 of protrusion, cylindrically shaped or the substantially cylindrical of this second department of assembly 133, its axially also with axially in parallel (namely parallel with the Y direction shown in Fig. 1) in backflow portion 12, one end is vertically connected on this end face of connecting portion main body 131, and the other end stretches out outside valve body 10. The core of the second department of assembly 133 axially offers the second pilot hole 133a, and this second pilot hole 133a is the screw connection structure being opened on the second department of assembly 133 end and 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 installed parts such as bolt corresponding with shape, rivet and coordinates, and carries out spacing to valve body 10, is fixedly fitted in automotive air-conditioning system by this valve body 10 or other use in environment.

The inside of connecting portion main body 131 is further opened with the 4th installing hole 134, upper rod aperture 135 and the lower rod aperture 136 that set gradually from its top to bottom. 4th installing hole 134, upper rod aperture 135 and lower rod aperture 136 are cylindrical hole, and wherein the internal diameter of the 4th installing hole 134 is less than the internal diameter of the 3rd installing hole 125, is opened on the top of valve body connecting portion 13, connects coaxially with the 3rd installing hole 125; The internal diameter of upper rod aperture 135 is less than the internal diameter of the 4th installing hole 134, and connects coaxially with the 4th installing hole 134; The internal diameter of lower rod aperture 136, less than the internal diameter of upper rod aperture 135, connects coaxially with upper rod aperture 135, and is opened on the bottom of valve body connecting portion 13.

Flow control division 14 includes the first throughput 141 and the second throughput 142, the equal substantially cylindrical of shape of this first throughput 141 and the second throughput 142, and they axially all with axially in parallel or almost parallel (namely parallel or substantially parallel with the Y direction shown in Fig. 1) in backflow portion 12. First throughput 141 is connected towards the subregion of the side on valve body 10 top and the bottom of valve body connecting portion 13, the end face of first throughput 141 one end and an end face of valve body connecting portion 131 are in same plane, and the subregion of this end face of this first throughput 141 is connected with a part of end face of second throughput 142 one end, the other end of the first throughput 141 is then crossed another end face of valve body connecting portion 131 and is stretched out outside valve body 10. The both sides of the first throughput 141 and the both sides of the second throughput 142 all convex to form the convex surface close to semi-cylindrical, the protrusion direction of two convex surfaces that this first throughput 141 is formed be respectively the X-direction shown in Fig. 1 positively and negatively, the protrusion direction of two convex surfaces that second throughput 142 is formed also be respectively the X-direction shown in Fig. 1 positively and negatively, and the convex surface that formed with the second throughput 142 of the first throughput 141 is axial all parallel with the Y direction shown in Fig. 1. The diameter of the first throughput 141 is more than the distance between two sides of connecting portion main body 131 so that the above-mentioned convex surface that the first throughput 141 both sides convex to form is protrude relative to two sides of connecting portion main body 131. First throughput 141 offers first-class through hole 143, this first-class through hole 143 is the axially extended stepped hole along the first throughput 141, it includes the first exit orifice portion 143a and the first endoporus portion 143b, this first exit orifice portion 143a and the first endoporus portion 143b is cylindrical hole and is interconnected coaxially, the internal diameter of the first exit orifice portion 143a internal diameter more than the first endoporus portion 143b. Wherein, it is internal that the first endoporus portion 143b is arranged on the first throughput 141, and lower rod aperture 136 extends to the first throughput 141 from valve body connecting portion 13 is internal, and connects towards the side on valve body 10 top with the first endoporus portion 143b. First exit orifice portion 143a is arranged on outside the first endoporus portion 143b, and its one end connects coaxially with the first endoporus portion 143b, and the other end forms opening in the first throughput 141 on the one end stretched out outside valve body 10. In the present embodiment, the diameter of the diameter of this opening that this first exit orifice portion 143a is formed other parts relative to this first exit orifice portion 143a expands further, formed substantially flare, for connecting the 3rd pipe connection portion 143c of fluid-transporting tubing.

In present embodiment, in the end face of the 3rd pipe connection portion 143c end and the end face of the first pipe connection portion 123 end are generally aligned in the same plane, it is to say, the end face of one end, described backflow portion 121 concordant with the end face of described first throughput 141 end (in being namely generally aligned in the same plane). So when carrying out die sinking for this valve body 10 of manufacture, it is possible to the shape of mould is designed to comparatively rule, simplifies manufacturing process. This first throughput 141 is further opened with the valve opening 145 for regulated fluid flow. This valve opening 145 is cylindrical hole, is interconnected with the opposite side towards valve body 10 bottom of this first endoporus portion 143b, and is mutually aligned coaxially across the first endoporus portion 143b with lower rod aperture 136.

As mentioned above, the portion end surface (for portion end surface above in figure) of second throughput 142 one end is connected with the subregion of an end face of the first throughput 141, the other end of the second throughput 142 then extends outside valve body 10, the bearing of trend of its bearing of trend and the first throughput 141 is contrary, and namely the first throughput 141 and the second throughput 142 extend out from the opposite sides of valve body 10 respectively. Second throughput 142 offers second through hole 144, this second through hole 144 is the axially extended stepped hole along the second throughput 142, it includes the second exit orifice portion 144a and the second endoporus portion 144b, this second exit orifice portion 144a and the second endoporus portion 144b is cylindrical hole and is interconnected coaxially, the internal diameter of the second exit orifice portion 144a internal diameter more than the second endoporus portion 144b. Wherein, it is internal that second endoporus portion 144b is arranged on the second throughput 142, second exit orifice portion 144a is arranged on outside the second endoporus portion 144b, and its one end connects coaxially with the second endoporus portion 144b, and the other end forms opening in the second throughput 142 on the one end stretched out outside valve body 10. In the present embodiment, the diameter of the diameter of this opening that this second exit orifice portion 144a is formed other parts relative to this second exit orifice portion 144a expands further, formed substantially flare, for connecting the 4th pipe connection portion 144c of fluid-transporting tubing. In present embodiment, in the end face of the end face of the 4th pipe connection portion 144c end and the end face of second pipe connecting portion 124 end and the second department of assembly 133 end is generally aligned in the same plane, it is to say, the end face of one end, described backflow portion 121 concordant with the end face of the end face of described second throughput 142 end and described second department of assembly 133 end (in being namely generally aligned in the same plane). So when carrying out die sinking for this valve body 10 of manufacture, it is possible to the shape of mould is designed to comparatively rule, simplifies manufacturing process.

Base portion 15 is generally cylindrical, it is axially consistent with the length direction of valve body 10 (namely consistent with the Z-direction shown in Fig. 1), its top (namely towards the one end on valve body 10 top) is connected with the subregion of the side (namely towards the side of valve body 10 bottom) of the first throughput 141 connecting portion main body 131 dorsad, and another part end face (being the portion end surface being positioned below in figure) of one end being connected with the first throughput 141 of the second throughput 142 is connected with the subregion of the side of this base portion 15; The bottom of base portion 15 is exactly the bottom of valve body 10. Offering valve chamber 151 in base portion 15, this valve chamber 151 is longitudinally disposed cylindrical step hole, and it is axially consistent with the length direction of valve body 10, including the cylindrical hole section of multiple coaxial communication. Along the direction from the top of valve body 10 to the bottom of valve body 10, the diameter of each hole section is incremented by successively, bottom, that is the maximum hole section of diameter forms opening in base portion 151 bottom. The top (namely towards the one end on valve body 10 top) of valve chamber 151 extends in the first throughput 141, and connects coaxially with valve opening 145. Second endoporus portion 144b of second through hole 144 then extends in this base portion 15, and connects with the side of valve chamber 151.

The above is only the contour structures of valve body of heating power expansion valve of an embodiment of the invention, the concrete shape of all parts of valve body of heating power expansion valve of the present invention, size and structural relation is any limitation as. In other embodiments, air tank head installation portion 11, backflow portion 12, valve body connecting portion the 13, first throughput the 141, second throughput 142 and the concrete shape of base portion 15, size and structural relation are all likely to be of certain change. Such as, the first pipe connection portion 123 and second pipe connecting portion 124 that in present embodiment, the both ends open place of return flow line 121 is formed are mutually aligned, but the two is likely to and is not mutually aligned and is arranged to other position relationships in other embodiments, such as the two towards the angle that can be mutually perpendicular to or be formed other angles, and the concrete shape in backflow portion 12 can also make adaptive change therewith. Similarly, the first throughput 141 is axially and the second throughput 142 axial except being parallel to each other, it is also possible to be arranged to other position relationships, for instance be mutually perpendicular to or formed the angle of other angles. Second throughput 142 position in the vertical can be more nearly the bottom of valve body 10, its one end can be fully connected on the outer peripheral face of base portion 15 (namely whole end faces of this end are all connected with the subregion of the outer peripheral face of base portion 15), and stagger completely with the end of the first throughput 141, namely the end of the second throughput 142 is not necessarily intended to the end of the first throughput 141 and is directly connected, but makes the second throughput 142 fully but not partly extend out base portion 15. First department of assembly 132 can also be not formed on an end face of connecting portion main body 131, and is formed on the end face of first throughput 141 one end. In present embodiment, the distance (namely above-mentioned L2) between distance (namely above-mentioned L2) and two end faces of the first department of assembly 132 between diameter and two end faces of connecting portion main body 131 of base portion 15 is roughly equal, and in other embodiments, the diameter of base portion 15 can also more than the distance (namely above-mentioned L2) between the distance (namely above-mentioned L2) between the two of connecting portion main body 131 end faces and two end faces of the first department of assembly 132.

Air tank head 20 includes main part 21 and socket part 22, and wherein most of feature of main part 21 is similar with existing air tank head, be internally provided with thermal expansion medium and can by thermal expansion media expansion time generation pressure-actuated diaphragm. The shell of main part 21 protrudes and forms socket part 22, this socket part 22 is cylindrical shape, its outer peripheral wall is the smooth face of cylinder, and the internal diameter of internal diameter and the first installing hole 111 is corresponding, may be inserted in the first installing hole 111, and utilize the such as mode such as threaded to be fixed in the first installing hole 111. Main part 21 is connected with return flow line 121 by the first installing hole 111. This air tank head 20 is for sensing the temperature of the evaporator outlet of automotive air-conditioning system, medium therein can produce the thermal expansion of degree of correspondence according to the temperature sensed, its diaphragm is driven to move by thermal expansion, the valve rod 30 being connected with air tank head 20 is produced pressure, valve rod is made to promote spool 40 to move under the driving of this pressure, thus regulating the aperture of valve opening 145, reach the effect of adjusting refrigerant flow rate.

Valve rod 30 includes drive link 31 and underdrive bar 33. The bottom of the main part 21 of air tank head 20 is supported or be fixed in one end of upper drive link 31, and shaft is through socket part the 22, first installing hole 111, return flow line the 121, second installing hole 122 and the 3rd installing hole 125, and the other end then stretches in rod aperture 135. The diameter of underdrive bar 33 is not more than the internal diameter of lower rod aperture 136, axially displaceably it is set in lower rod aperture 136, one end that its one end and upper drive link 31 stretch into rod aperture 135 supports coaxially mutually, the other end passes the first endoporus portion 143b along the axially vertical direction with the first endoporus portion 143b, and stretches in valve opening 145.

Spool 40 is steel ball in the present embodiment, is placed in valve chamber 151 and is directed at valve opening 145, and underdrive bar 53 stretches into one end alignment spool 70 of valve opening 145 and supports on spool 70. The shape of spool 40 and size are corresponding with valve opening 145, can regulate the aperture of valve opening 145 relative to valve opening 145 when it moves axially.

Governor motion 50 includes adjustment seat the 51, first spring 52, valve core frame 53 and the second spring 54. Adjustment seat 51 substantially has the round table-like of stairstepping outer peripheral face, it is closest to valve body 10 bottom, also be the maximum a part of outer peripheral face of diameter with valve chamber 151 close to valve body 10 bottom, also be that the maximum a part of inwall of internal diameter adopts the such as mode such as threaded to cooperate fixing, make adjustment seat 51 regularly and height adjustable be assemblied on valve body 10. Adjustment seat 51 central authorities offer for holding the spring eye 51a regulating spring 52. First spring 52 is cylindrical helical spring, and it is placed between adjustment seat 51 and spool 40 and is radially limited in spring eye 51a, it is possible to longitudinally flexibly stretch. Valve core frame 53 is generally cylindrical, it is placed between the first spring 52 and spool 40, its one end is enclosed within the first spring 52 coaxially, the other end stretches out from the first spring 52 top and forms the loop diameter flange more than the first spring 52 internal diameter around, it is prevented that it is internal that valve core frame 53 falls into the first spring 52. Second spring 54 is butterfly spring, and its top is fixed on valve core frame 53 periphery, and the alar part at edge is supported on valve chamber 151 inwall, for the position of valve core frame 53 is maintained at the central authorities of valve chamber 151, it is prevented that valve core frame 53 offsets. Spool 40 is clamped in one end that valve core frame 53 stretches out from the first spring 52 top and underdrive bar 33 stretches between one end of valve opening 145. When the medium in air tank head 20 does not produce the thermal expansion of enough degree, the elastic force of the first spring 52 can drive valve core frame 53, spool 40 and valve rod 30 to be all moved upward, make spool 40 closer to valve opening 145, reduce the orifice size of valve opening 145, thus reducing the refrigerant flow by valve opening 145.

Additionally, this heating power expansion valve 100 also includes backflow portion sealing ring 91, tabletting 92, upper rod aperture sealing ring 93 and valve chamber sealing ring 94. Backflow portion sealing ring 91 is the O adopting elastomeric material such as rubber to make, and its cross section is generally L-shaped, corresponding with the shape of the compound seal groove that above-mentioned first seal groove 112 and the second seal groove 114 are constituted and size. This backflow portion sealing ring 91 is embedded in this compound seal groove, it is set on the outside side face of the insertion section 22 inserting the first installing hole 111 simultaneously, interference fit is formed between outer surface and the inner surface of air tank head installation portion 11 in insertion section 22, air tank head 20 further can be fixed, and prevent the cold-producing medium in return flow line 121 from leaking out from the first installing hole 111. Tabletting 92 is adopt the thin rounded flakes that is made of such as copper of metal material, and its diameter is with the 3rd installing hole 125 diameter accordingly, central then offer diameter and be not less than the through hole (in figure non-label) of drive link 31 diameter. This tabletting 92 is fixed in the 3rd installing hole 125, and upper drive link 31 passes from the through hole that tabletting 92 central authorities offer. Upper rod aperture sealing ring 93 is also the O adopting elastomeric material such as rubber to make, and when not deforming, on this, the external diameter of rod aperture sealing ring 93 is slightly larger than the diameter of upper rod aperture 135, and internal diameter is then slightly less than the diameter of drive link 31. On this, rod aperture sealing ring 93 is placed in the 4th installing hole 134 and spacing by tabletting 92, and rod aperture sealing ring 92 is fitted snugly on drive link 31 on this, its outer periphery is closely pressed on the 4th installing hole 134 inwall, namely between upper drive link 31 and the inwall of the 4th installing hole 134, interference fit is formed, for preventing the cold-producing medium in valve chamber 151 from being leaked out by lower rod aperture 136 and upper rod aperture 135. Valve chamber sealing ring 94 is also the O for adopting elastomeric material such as rubber to make, it is set on the outer peripheral face that a part of diameter of adjustment seat 51 is less (such as, can be embedded in the annular groove being opened on adjustment seat 51 outer peripheral face), and between the inwall of adjustment seat 51 and valve chamber 151, form interference fit, for preventing the cold-producing medium in valve chamber 151 from leaking out from valve body 10 bottom.

During use, the second through hole 144 of this heating power expansion valve 100 is connected with the refrigerant outlet of condenser by condenser output channel, and first-class through hole 143 is connected with the refrigerant inlet of vaporizer by vaporizer input channel. First pipe connection portion 123 is connected with the refrigerant inlet of vaporizer by evaporator output tube road, and second pipe connecting portion 124 is connected with the refrigerant outlet of compressor by compressor input channel. This heating power expansion valve 100 is operationally, the cold-producing medium carrying out condenser passes into valve chamber 151 from second through hole 144, if now valve opening 151 is not completely closed by the position at spool 40 place, then cold-producing medium is transported to vaporizer for freezing by valve opening 151 and first-class through hole 143. The cold-producing medium raised for temperature after freezing is discharged from vaporizer, flows back to compressor for recycling through second pipe connecting portion 124, return flow line 121 and the first pipe connection portion 123. When the cold-producing medium that temperature after using raises flows through return flow line 121, also can be touched the main part 21 of air tank head 20 by the second installing hole 112 and the first installing hole 111. After main part 21 senses the operating modes such as temperature or the temperature and pressure of cold-producing medium, medium therein produces corresponding thermal expansion according to the operating mode sensed, by thermal expansion, the upper drive link 31 of valve rod 30 is produced pressure, upper drive link 31 promotes underdrive bar 33 and spool 40 axially to move under the driving of this pressure, thus regulating the aperture of valve opening 145, regulate the refrigerant flow by valve opening 145 further. It is appreciated that, when the refrigeration of vaporizer is poor, the refrigerant temperature of backflow will raise, the degree of thermal expansion that now air tank head 20 produces will be bigger, valve rod 30 entirety can be pushed down on bigger amplitude, spool 40 is pushed up downwards and away from valve opening 145, thus expanding the aperture of valve opening 145, cause that the refrigerant flow flowing into vaporizer increases, strengthen refrigeration. If the refrigeration of vaporizer is very strong, the thermic load of air conditioning system reduces, the refrigerant temperature then refluxed will reduce, the degree of thermal expansion that air tank head 20 produces is diminished, the amplitude that valve rod 30 moves down reduces, and now regulates spring 52 meeting resilience, is again pushed up upward by spool 40, reduce the aperture of valve opening 145 so that the refrigerant flow flowing into vaporizer reduces.

Different installation requirement according to valve body 10, above-mentioned first department of assembly 132 and/or the second department of assembly 133 can also be omitted or make change on concrete structure. Such as, in the heating power expansion valve that the embodiment shown in Fig. 4 provides, the second department of assembly 133 is omitted. In the heating power expansion valve that the embodiment shown in Fig. 5 provides, first installing hole 132a of at least one the first department of assembly 132 except having opening on the two of this first department of assembly 132 end faces, on the side of the first department of assembly 132, still form the axially in parallel linear opening 132b with the first department of assembly 132 so that the radial section of the first department of assembly 132 be generally shaped like C shape. Additionally, the first installing hole 132a can also be replaced by the groove (not shown) being opened on the first side, department of assembly 132, the shape of this groove can be the axially extended V-shaped groove (namely its cross section is substantially in del) along the first department of assembly 132, its two ends form opening respectively on two end faces of the first department of assembly 132 so that the radial cross-sectional shape of the first department of assembly 132 is substantially v-shaped. In the heating power expansion valve that the embodiment shown in Fig. 6 provides, valve body connecting portion 131 also includes the reinforcement 133b of longitudinally disposed tabular, this reinforcement 133b is connected between the downside of the second department of assembly 133 and the upside of the second throughput 142 and between the upside of the second department of assembly 133 and the downside of second pipe access section 124, connect for providing between multiple projections (the second department of assembly's the 133, second throughput 142 and second pipe access section 124 as escribed above) of valve body 10 and support, be favorably improved the overall construction intensity of valve body 10. Additionally, between the first throughput 141 and the first pipeline access section 143b, longitudinal tabular reinforcement 133b can also be set, connect for providing between the first throughput 141 and the first pipeline access section 143b and support, improve the overall construction intensity of valve body 10 further.

It is appreciated that, the first department of assembly 132 and/or the specific structural features of the various changes of the second department of assembly 133 that these embodiments above-mentioned provide can be respectively provided with in various embodiments, it is also possible to be simultaneously located at whole or in part in same embodiment. Such as, in the heating power expansion valve that the embodiment shown in Fig. 7 provides, second department of assembly 133 is omitted, first installing hole 132a of the 132 of at least one the first department of assembly forms the axially in parallel linear opening 132b with the first department of assembly 132 on the side of the first department of assembly 132, and is connected by the reinforcement 133b of longitudinally disposed tabular between the upside of the second throughput 142 and the downside of second pipe access section 124. It is to say, this heating power expansion valve contains the architectural feature of the heating power expansion valve of three shown in above-mentioned Fig. 4-6 embodiment simultaneously.

In the other embodiment of the present invention, valve body connecting portion 13 can also adopt other structures. Such as, in the heating power expansion valve that the embodiment shown in Fig. 8 provides, the external shape of connecting portion main body 131 not substantially cuboid, but substantially cylindrical, its diameter is less than the diameter of base portion 15. Valve body connecting portion 131 axially and backflow portion 12 axially vertical or substantially vertical, its top is connected with the subregion of the lower middle side part in backflow portion 12, and bottom is connected with the subregion of the upside of the first throughput 141. Second department of assembly 133 extends out from the side of valve body connecting portion 131 along the axially in parallel direction with backflow portion 12 and the second throughput 142, and the first department of assembly 132 is then omitted. Between downside and the upside of the second throughput 142 of the second department of assembly 133, between upside and the downside of second pipe access section 124 of the second department of assembly 133 and the reinforcement 133b of longitudinally connected tabular can be set between the first throughput 141 and the first pipeline access section 143b. It addition, this second department of assembly 133 can also be omitted, namely similar with the embodiment shown in above-mentioned Fig. 7, the reinforcement 133b of longitudinally disposed tabular is connected directly between upside and the downside of second pipe access section 124 of the second throughput 142.

Compared with prior art, heating power expansion valve 100 provided by the invention is by after cutting aluminium bar material or aluminium alloy bar and forming valve body blank, then valve body blank is forged and pressed and perforate and form its valve body. Owing to valve body blank adopts forging and stamping mode to be formed, therefore required complicated shape directly can all be forged and pressed out in all directions of valve body blank, without forming bigger plane as the existing method forming valve body blank by cutting section bar in valve body blank both sides. Compared with prior art, the valve body profile of heating power expansion valve provided by the invention is more accurate, and can have less volume and weight.

It should be understood that above example be merely to illustrate the present invention and and unrestricted technical scheme described in the invention, although this specification with reference to the above embodiments to present invention has been detailed description, but, it will be understood by those within the art that, the present invention still can be modified or equivalent replacement by person of ordinary skill in the field, and all are without departing from the technical scheme of the spirit and scope of the present invention and improvement thereof, all should be encompassed in scope of the presently claimed invention.

Claims (10)

1. a heating power expansion valve, including air tank head, valve rod, spool and valve body, it is characterized in that: described valve body is formed by forging and pressing processing by aluminum alloy materials, and include being the air tank head installation portion of integrative-structure, backflow portion, valve body connecting portion, flow control division and base portion, described valve body connecting portion includes connecting portion main body, described air tank head installation portion is arranged on the side in described backflow portion, described connecting portion main body is arranged on the opposite side of the described dorsad air tank head installation portion in described backflow portion, described flow control division includes the first throughput and the second throughput, described first throughput is arranged on the side in the described dorsad backflow portion of described connecting portion main body, described base portion is arranged on the side of the described dorsad connecting portion main body of described first throughput, described second throughput is described base portion or partly extends out described base portion, offering valve opening between wherein said first throughput and the second throughput, described first throughput offers the first-class through hole connected with described valve opening, and described second throughput offers the second through hole connected with described valve opening, described backflow portion is provided with return flow line, and described air tank head installation portion is provided with the first installing hole connected with described return flow line, described air tank head and described air tank head installation portion are arranged with being relatively fixed, described valve rod and spool are arranged on described valve inner, described spool is directed at described valve opening and arranges, the described backflow portion of described valve rod traverse and valve body connecting portion, and one end of described valve rod supports or be fixed on described air tank head, the other end is directed at described spool, described heating power expansion valve utilizes described air tank head to sense the fluid condition within described return flow line via described first installing hole, the medium generation harmomegathus within described air tank head is made according to the fluid condition that described air tank head senses, thus changing described valve rod and the spool position relative to described valve opening, regulate the aperture of described valve opening, and then regulate the flow of the fluid being flow through described valve body by described first-class through hole, valve opening and second through hole.

2. heating power expansion valve as claimed in claim 1, it is characterized in that: described air tank head is arranged on described air tank head installation portion and is partly contained in described first installing hole, described valve body is provided with valve chamber its base portion and the part inside from base portion, and described valve chamber connects with described second through hole; Described heating power expansion valve also includes governor motion, and described spool is at least partially disposed in described valve chamber, and described governor motion is arranged in described valve chamber, provides the elastic force of end face towards described valve rod one end to described spool.

3. heating power expansion valve as claimed in claim 1 or 2, it is characterized in that: the shape in described air tank head installation portion and described backflow portion all substantially annular or cylindrical shape, one end of described air tank head installation portion and the subregion of side, described backflow portion are connected, and the part surface of the opposite side of the top of described connecting portion main body and the described dorsad air tank head installation portion in described backflow portion is connected; The shape of described first throughput and the second throughput is all substantially cylindrical, and the subregion of the side of described first throughput is connected with the bottom of described connecting portion main body; Described base portion generally cylindrical in shape, the subregion of the side of the described dorsad connecting portion main body of its one end and described first throughput is connected; The part of one end of described second throughput is connected with the part of first throughput one end, and another part of this end of described second throughput is connected with a part for the outer peripheral face of described base portion; Or this end of described second throughput is connected with a part for the outer peripheral face of described base portion; Axially being parallel to each other or be substantially parallel to each other of described backflow portion, the first throughput and the second throughput, and equal axially vertical or substantially vertical with described air tank head installation portion and base portion.

4. heating power expansion valve as claimed in claim 3, it is characterised in that: two relative sidepieces that described connecting portion main body includes being connected between top and the bottom of described connecting portion main body and two relative end faces; Distance between two end faces of described connecting portion main body is less than the axial length in described backflow portion, and roughly equal with the diameter of described base portion or less than described base portion diameter; The surface in described backflow portion and the surface of described first throughput are all formed and are respectively relative to what said two side surfaces was protruded, are generally shaped like the convex surface of semi-cylindrical.

5. the heating power expansion valve as according to any one of claim 1-4, it is characterised in that: described valve body connecting portion also includes for coordinating with installed part, and described heating power expansion valve carries out the first spacing department of assembly; Described first department of assembly is generally shaped like the semicylinder being provided with through hole, or the radial section of the first department of assembly be generally shaped like C shape or V-arrangement; Described first department of assembly is convexly equipped at least one described sidepiece of described connecting portion main body, and axially axially in parallel or almost parallel with described backflow portion, the first throughput and the second throughput of described first department of assembly.

6. heating power expansion valve as claimed in claim 5, it is characterised in that: described valve body connecting portion also includes for coordinating with installed part, and described heating power expansion valve carries out the second spacing department of assembly; The external shape substantially cylindrical of described second department of assembly, outwardly from the side of described valve body, it is axially in parallel or almost parallel with described backflow portion axially, and described second department of assembly is provided with the screw connection structure of non through hole.

7. heating power expansion valve as claimed in claim 5, it is characterised in that: described valve body connecting portion also includes the reinforcement that is connected between described first throughput and described backflow portion and/or is connected to the reinforcement between described second throughput and described backflow portion.

8. heating power expansion valve as claimed in claim 3, it is characterized in that: described connecting portion main body be generally shaped like cylinder, it is axially vertical with described backflow portion axially, and its two ends are connected with the subregion of the subregion of side, described backflow portion and described first throughput side respectively.

9. heating power expansion valve as claimed in claim 8, it is characterised in that: described valve body connecting portion also includes, for coordinating with installed part, described heating power expansion valve being carried out spacing department of assembly; The external shape substantially cylindrical of described department of assembly, outwardly from the side of described valve body, it is axially in parallel or almost parallel with described backflow portion axially, and described department of assembly is provided with the screw connection structure of non through hole.

10. as claimed in claim 8 or 9 heating power expansion valve, it is characterised in that: described valve body connecting portion also includes the reinforcement that is connected between described first throughput and described backflow portion and/or is connected to the reinforcement between described second throughput and described backflow portion.