CN102878733A - Expansion valve components, one-way expansion valve and two-way circulation expansion valve - Google Patents

Expansion valve components, one-way expansion valve and two-way circulation expansion valve Download PDF

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Publication number
CN102878733A
CN102878733A CN2012104183055A CN201210418305A CN102878733A CN 102878733 A CN102878733 A CN 102878733A CN 2012104183055 A CN2012104183055 A CN 2012104183055A CN 201210418305 A CN201210418305 A CN 201210418305A CN 102878733 A CN102878733 A CN 102878733A
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CN
China
Prior art keywords
valve
expansion valve
spool
outlet
damping
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CN2012104183055A
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CN102878733B (en
Inventor
金耿
阮义兵
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WENLING HENGFA AIR CONDITION COMPONENTS CO Ltd
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WENLING HENGFA AIR CONDITION COMPONENTS CO Ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/38Expansion means; Dispositions thereof specially adapted for reversible cycles, e.g. bidirectional expansion restrictors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves

Abstract

The invention provides expansion valve components, a one-way expansion valve and a two-way circulation expansion valve, belonging to the technical field of refrigeration of variable frequency air conditioners. The invention solves the problem that the service life of a valve is shortened due to frequent abrasion of the conventional valve cores and the conventional vale bases. The two-way circulation expansion valve comprises a valve block which is provided with two parallel channels, wherein each channel is provided with an inlet end and an outlet end; an expansion valve component which is provided with a damping structure is connected to each outlet end; a bypass hole for communicating an outlet of the expansion valve component on one channel with the inlet end of the other channel is formed in the valve block; and a protection cover for preventing a medium from being leaked when flowing through the bypass hole and the outlet is welded at each outlet end. The two expansion valve components are arranged in parallel to ensure that a function of two-way circulation is realized; and the movement of a valve core is reduced by the damping structures, so that the service life of the expansion valve components is prolonged and the energy efficiency ratio of the expansion valve components is improved, thereby being of great significance for energy conservation and emission reduction.

Description

A kind of expansion valve component and single ported thermostatic expansion valve and the expansion valve that two-way circulates
Technical field
The invention belongs to air-conditioning technical field, relate to a kind of refrigerating of convertible frequency air conditioner machine automatization expansion valve, particularly a kind of expansion valve component and single ported thermostatic expansion valve and the expansion valve that two-way circulates.
Background technology
Compressor, condenser, expansion valve, evaporimeter four large parts have formed refrigeration system jointly.Expansion valve is a vitals in the refrigeration system, generally is installed between condenser and the evaporimeter.Expansion valve can make the gas through evaporator evaporation liquefy to the liquid refrigerant of high temperature high pressure by compressor boost, and become the vaporific liquid refrigerant of low-temp low-pressure by its restriction throttling, then cold-producing medium absorbs heat and reaches refrigeration in evaporimeter.The degree of superheat of expansion valve by the evaporimeter end changes comes the by-pass valve control flow, prevents under-utilized because of the too small evaporator area of flow and the not enough cold-producing medium gasification of the too much evaporator area of flow not exclusively sucks compressor and produces the liquid state impact.The idle call expansion valve is divided into mechanical swelling valve and electric expansion valve, existing convertible frequency air-conditioner mainly utilizes electric expansion valve by regulating latus rectum control pressure reduction, reach by designing requirement control cold-producing medium gentleization that liquefy, some air-conditioning also useful mechanical swelling valve replaces electronic valve.
Electronic valve is that guaranteeing has constant pressure differential before and after the valve, gives full play to the effect of condenser and evaporimeter by data signal drive motors control electronic valve latus rectum size.Owing to the adjustable timely regulating electric machine rotating speed of compressor electric motor rotating speed frequency conversion, compressor electric motor rotating speed and electric expansion valve motor corner can change synchronously so simultaneously, guarantee that the pressure reduction before and after the electronic valve is constant, so conditioner efficiency is very high.
But because the electronic valve price comparison is expensive, so also there is capillary to replace electronic expansion, then replace common compressor with frequency-changeable compressor, the pressure differential off-design requires just to change the frequency-changeable compressor rotating speed before and after capillary like this, and capillary front and back pressure differential is met design requirement.
A kind of bidirectional flow heat expansion valve [patent No.: 200510048901.9 such as the Chinese patent announcement, notification number: CN1804440], comprise valve body and power head part, offer first interface and the second interface on the valve body, offer the valve port that is communicated with first interface and the second interface in the valve body, downside at valve port is provided with the valve hole part that is obtained the relative support of transmission bar of power by regulating spring and driven force head member, it is characterized in that offering the throttle orifice that is communicated with first interface and the second interface on the described valve hole part, be built-in with the movable part that this throttle orifice is remained on unimpeded or closed state at this throttle orifice.Throttle orifice wherein cooperates the one-way throttle structure that consists of heating power expansion valve inside with movable part, be similar to an one-way throttle valve, the existence of this structure so that heating power expansion valve can two-way circulate, when being applied on the air-conditioning system, the convenient installation, reduce the potential leakage point that brings because of weld seam quantity more, and reduced the manufacturing cost of air-conditioning system.Although but this expansion valve that two-way circulates can realize two-way circulating, be not two-way circulating truly.Because this valve only when forward circulates, changes the bore of realizing valve by temperature-sensitive bag temperature sensor and changes.And can only be by the circulation of the throttle orifice on the valve core during reverse circulated, the bore of valve can not change, and unnecessary resistance when having increased the cold-producing medium circulation increases the energy consumption of air conditioner.And throttle orifice is by the movable part shutoff in the time of oppositely, and spool must be open and could circulate, and causes like this spool frequent impact under acting force of the spring, the service life of having reduced valve.
Summary of the invention
The objective of the invention is to have the problems referred to above for existing technology, having proposed a kind of is by controlling the latus rectum of the instant control valve of compressor output flow, and can guarantee the single ported thermostatic expansion valve of the pressure differential before and after the valve such as original heating power expansion valve, and be connected to form in groups the expansion valve that two-way circulates by this single ported thermostatic expansion valve.
Purpose of the present invention can realize by following technical proposal: a kind of expansion valve component, comprise valve body with import and outlet, be fixed on valve seat, the spool in the valve body and spool is had to the spring of valve seat mobile trend, it is characterized in that, described spool has cone shape head, offer the taper hole that is complementary with the spool head on the described valve seat, be provided with the damping structure that can have to spool cushioning effect between described spool and the valve seat.
Cold-producing medium enters in the valve body from import, through the slit between spool and the valve seat, discharges from the outlet of valve body.Because at the inner chamber of a relative closure between valve body and spool of spool mobile route design, therefore when being moved, spool produces damping.Because the existence of damping so a buffering course is arranged when spool moves, has reduced the impact of spool, reduced cone shape head and valve seat on the spool against the time wearing and tearing, service life of raising expansion valve component.
In above-mentioned expansion valve component, described valve body is straight-tube shape, and import is positioned at the port of straight-tube shape valve body, and outlet is opened on the sidewall of valve body, the afterbody of described spool has cylinder and the damping annular groove very little with the valve body fit clearance, and described damping annular groove is equipped with the damping ring of an opening.Damping cavity after forming between valve body, valve core and the damping ring.
In above-mentioned expansion valve component, the head of described spool has front cylinder, prosthomere flow cone, transition cone, rear cylinder, deutomerite flow cone successively, and the taper hole of described valve seat has front cylindrical hole, prosthomere flow cone hole, transmission groove, rear cylindrical hole and the deutomerite flow cone hole that is complementary with the spool head successively.Damping cavity before forming between valve seat and spool has reasonable buffering so that spool travels forward during shut off valve, reduces the impact of spool, the life-span of raising valve.
In above-mentioned expansion valve component, described damping structure comprises three circulation passage that are opened in the spool, and described three circulation passage, one end can be connected with the transmission groove, and the other end can be connected with the outlet of valve body, also has an end to be connected with the rear damping cavity of valve body.Also offer the throttling pore that is communicated with transmission groove and channel entrance end on the described valve seat.When cold-producing medium was less, spool was motionless, and cold-producing medium enters in the transmission groove from throttling pore, then passes through the outlet of valve body.Cold-producing medium forms pressure by the inner chamber that aperture transfers the pressure to valve body simultaneously, make import and the outlet of inner chamber and valve body reach the pressure differential balance, reasonable cushioning effect is arranged when spool is lifted off a seat, prevent that spring from because of the living vibration of wink movable property, reducing the noise of spring.
In above-mentioned expansion valve component, stud with capillary in the described throttling pore.Capillary is a small-bore pipe that specific length is arranged, in refrigeration system, can produce predetermined Pressure Drop, capillary relies on its flow resistance to produce along its length Pressure Drop, control the flow and the pressure reduction of keeping condenser and evaporimeter of cold-producing medium, can guarantee that different refrigeration arrange minimum continuous cooling.
In above-mentioned expansion valve component, described throttling pore also is plugged with straight tube.The caliber of straight tube is less than the aperture of throttling pore, thus can be according to the actual conditions adjustment, load onto that the flow of cold-producing medium diminishes behind the straight tube.
In above-mentioned expansion valve component, the intracavity bottom of described valve body is fixed with spring base, and described spring one end is resisted against on the spring base, and the other end is resisted against on the spool, has the gag lever post that restraining spring swings on the described spring base.After increasing gag lever post, the circuit oscillation amplitude of spring tails off, and guarantees that spring can not work overloadingly, and improves spring life.
As another kind of scheme, in above-mentioned expansion valve component, described damping structure comprises three circulation passage that are opened in the spool, and described three circulation passage, one end can be connected with the transmission groove, the other end can be connected with the outlet of valve body, also have an end can with the intracavity inter-connection of valve body.Cold-producing medium in the passage just can be pushed spool open after accumulating to certain pressure, spool moves the rear transmission groove of a bit of distance and is connected with the import of valve body, and at this moment, cold-producing medium enters the transmission groove, discharges from the outlet of valve body through three circulation passage again.And by the centre bore cold-producing medium the rear damping cavity that pressure is passed to valve body is formed pressure, reasonable cushioning effect is arranged when spool is lifted off a seat, prevent the living vibration of spring wink movable property, reduce the noise of spring.
As another kind of scheme, in above-mentioned expansion valve component, described damping structure comprises two circulation passage that are opened in the spool, and described two circulation passage, one end can be connected with the transmission groove, the other end can with the intracavity inter-connection of valve body.Cold-producing medium enters into the entrance point of passage, promotes that spool is a bit of the slit to occur apart from back valve core and valve seat, and cold-producing medium flows to the outlet of valve body from the slit; And cold-producing medium forms pressure by centre bore with the rear damping cavity that pressure is passed to valve body, and reasonable cushioning effect is arranged when spool is lifted off a seat, and prevents the living vibration of spring wink movable property, reduces the noise of spring.
As another kind of scheme, in above-mentioned expansion valve component, described damping structure comprises the centre bore that axially runs through spool and the rear side opening that is connected with centre bore, and an end of rear side opening can be connected with the outlet of valve body.Cold-producing medium directly enters from the centre bore of spool, discharges from the outlet of valve body by rear side opening; And cold-producing medium forms pressure by centre bore with the rear damping cavity that pressure is passed to valve body, and reasonable cushioning effect is arranged when spool is lifted off a seat, and prevents the living vibration of spring wink movable property, reduces the noise of spring.
A kind of single ported thermostatic expansion valve; it is characterized in that, this single ported thermostatic expansion valve comprises above-mentioned expansion valve component and is enclosed within the outer protective cover of valve body, offers the interface relative with the outlet of valve body at protective cover; be fixed with out pipe on the described interface, be fixed with inlet pipe in the import department of valve body.
Noise when protective cover can reduce the expansion valve component running intercepts the noise unofficial biography; Simultaneously can protect valve body, and valve body does not have unnecessary welding position, protective cover has interface, and is convenient and go out being connected of pipe.
In above-mentioned single ported thermostatic expansion valve, described interface has outside flange, goes out pipe and is connected with flanging welded.Flange easily is welded and fixed with to go out to manage contact area large, has improved sealing and the stability of weld.
In above-mentioned single ported thermostatic expansion valve, be fixed with net-filter assembly in the described inlet pipe, described net-filter assembly comprises the rack that is fixed in the inlet pipe and the filter screen that is attached on the rack.Net-filter assembly is used for filtering the foreign material that cold-producing medium is mingled with, and prevents from stopping up expansion valve component.
A kind of expansion valve that two-way circulates; it is characterized in that; originally the expansion valve that two-way circulates comprises the valve piece with two passages parallel to each other; each passage has entrance point and the port of export; each described port of export place all is connected with above-mentioned expansion valve component; offer the by-pass prot that the outlet that makes the expansion valve component on the passage is connected with the entrance point of another passage on the described valve piece, also be welded with at described port of export place and prevent the protective cover that leaks when MEDIA FLOW is between by-pass prot and outlet.
Originally the expansion valve that two-way circulates is mainly used in the cold and warm type air-conditioning system, and the medium that flows in the air-conditioning is exactly cold-producing medium, and cold-producing medium enters into the import of expansion valve component from the entrance point of passage.Although entrance point is connected by the outlet of the expansion valve component on by-pass prot and another passage and since this case expansion valve component itself have can not reverse circulated function, so another passage is by shutoff.When refrigerant flow hour, cold-producing medium passes through from damping structure, spool does not move, when the outlet pressure of channel entrance end and expansion valve component is poor when acquiring a certain degree, spring is subjected to the extruding force of spool and shrinks, and spool just is extruded, cold-producing medium is from the slit flow mistake between spool and the valve seat, discharge from the outlet of expansion valve component, make the spool off-load, guarantee that the channel entrance end is poor relative constant with outlet pressure.Two expansion valve component are arranged in parallel, and realize two-way circulating function, and damping structure has reduced the motion of spool, improve the service life of expansion valve component.Protective cover protection expansion valve component, and be the exit passageway of expansion valve component.
In the above-mentioned expansion valve that two-way circulates, be equipped with in two passages of described valve piece for the import that intercepts expansion valve component and the spacer ring of outlet.Spacer ring can adopt elastomeric material to make, and improves the validity that intercepts, and prevents that cold-producing medium from directly entering into the entrance point of another passage through by-pass prot from the entrance point of a passage.
In the above-mentioned expansion valve that two-way circulates, the entrance point of described valve piece and the port of export all are fixed with valve gap, welding is fixed with inlet pipe and goes out pipe on the valve gap, described inlet pipe and go out all to be fixed with in the pipe the described net-filter assembly of net-filter assembly and comprise and be fixed on inlet pipe and go out the rack in the pipe and be attached to filter screen on the rack.Net-filter assembly is used for filtering the foreign material that cold-producing medium is mingled with, and prevents from stopping up expansion valve component.
Compared with prior art, this expansion valve component and single ported thermostatic expansion valve and the expansion valve that two-way circulates have the following advantages:
1. make the pressure differential of inner chamber and outlet and import keep balance by damping structure, guarantee the required pressure of refrigerant compression liquefaction.Simultaneously refrigerant flow hour, spool can be failure to actuate, and reduces the spring frequent movement, the service life of having improved expansion valve component.
2. damping cavity before forming between valve seat and spool cushions the impact of reduction spool, the life-span of raising expansion valve component so that spool has preferably when contact with valve seat.
3. spool and valve body form rear damping cavity, and preferably cushioning effect is arranged when spool is lifted off a seat, and prevent the living vibration of spring wink movable property, reduce the noise of spring, the life-span of improving expansion valve component.
4. suitable the cooperating of taper hole of the head of spool and valve seat.Can be along with refrigerant flow change, the head position of spool is moved, and the throttle chink size changes.Therefore can reduce the flow of refrigerant resistance, the Energy Efficiency Ratio that has improved whole air-conditioner is had significant role.
Description of drawings
Fig. 1 is the structural representation of this expansion valve component of embodiment one.
Fig. 2 is the structural representation of the spool of embodiment one.
Fig. 3 is the structural representation of the valve seat of embodiment one.
Fig. 4 is the schematic diagram of the damping structure of embodiment one.
Fig. 5 is the schematic diagram of the damping structure of embodiment two.
Fig. 6 is the schematic diagram of the damping structure of embodiment three.
Fig. 7 is the schematic diagram of the damping structure of embodiment four.
Fig. 8 is the schematic diagram of the damping structure of embodiment five.
Fig. 9 is the structural representation of the spool of embodiment five.
Figure 10 is the structural representation of the inner spool of embodiment five.
Figure 11 is the schematic diagram of the damping structure of embodiment six.
Figure 12 is the schematic diagram of the damping structure of embodiment seven.
Figure 13 is the structural representation of this single ported thermostatic expansion valve.
Figure 14 is the structural representation of expansion valve of originally two-way circulating.
Figure 15 is the structural representation of valve piece of expansion valve of originally two-way circulating.
Among the figure, 1, expansion valve component; 1a, valve body; 1a1, outlet; 1a2, inner chamber; 1a3, import; 1b, valve seat; 1b1, transmission groove; 1b2, throttling pore; 1b3, bar-shaped trough two; 1b4, front cylindrical hole; 1b5, prosthomere flow cone hole; 1b6, rear cylindrical hole; 1b7, deutomerite flow cone hole; 1c, spool; 1c1, head; 1c2, afterbody; 1c3, three circulation passage; 1c4, two circulation passage; 1c5, centre bore; 1c6, rear side opening; 1c7, bar-shaped trough one; 1c8, front cylinder; 1c9, prosthomere flow cone; 1c10, rear cylinder; 1c11, deutomerite flow cone; 1d, spring; 2, valve piece; 2a, passage; 2b, entrance point; 2c, by-pass prot; 2d, the port of export; 3, spring base; 3a, gag lever post; 4, spacer ring; 5, damping ring; 6, protective cover; 6a, interface; 7, valve gap; 8, inlet pipe; 9, net-filter assembly; 10, inner spool; 10a, guiding gutter; 11, little spring; 12, go out pipe.
The specific embodiment
Below be specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
Embodiment one
As shown in Figure 1, this expansion valve component comprises valve body 1a with import 1a3 and outlet 1a1, is fixed on valve seat 1b, the spool 1c in the valve body 1a and spool 1c is had to the spring 1d of valve seat 1b mobile trend.Spool 1c has cone shape head 1c1, offers the taper hole that is complementary with spool 1c head 1c1 on the valve seat 1b, is provided with the damping structure that can have to spool 1c cushioning effect between spool 1c and the valve seat 1b.
Specifically, such as Fig. 2, Fig. 3, shown in Figure 4, valve body 1a is straight-tube shape, and import 1a3 is positioned at the port of straight-tube shape valve body 1a, and outlet 1a1 is opened on the sidewall of valve body 1a, also has the cylindrical afterbody 1c2 that links to each other with spool 1c head 1c1 on the spool 1c.The head 1c1 of spool 1c has front cylinder 1c8, prosthomere flow cone 1c9, transition cone successively, rear cylinder 1c10, deutomerite flow cone 1c11, the taper hole of valve seat 1b have corresponding front cylindrical hole 1b4, prosthomere flow cone hole 1b5, transmission groove, rear cylindrical hole 1b6 and deutomerite flow cone hole 1b7 successively.
Damping structure comprises the three circulation passage 1c3 that are opened in the spool 1c, three circulation passage 1c3, one end can be connected with transmission groove 1b1, the other end can be connected with the outlet 1a1 of valve body 1a, also having an end can be rear damping cavity with the inner chamber 1a2(of valve body 1a) be connected, also offer the throttling pore 1b2 of the import 1a3 that is communicated with transmission groove 1b 1 and valve body 1a on the valve seat 1b.Stud with capillary in the throttling pore 1b2, change the flow of throttling pore 1b2 with this.
Be arranged with the damping ring 5 with opening on the afterbody 1c2 of spool 1c, in the damping annular groove of offering on the face of cylinder that the afterbody 1c2 that damping ring 5 is arranged on spool 1c and valve body 1a are close to mutually.The damping ring 5 of the sealing that certainly, diameter is less also can reach the identical effect with the damping ring 5 with opening.The inner chamber 1a2 bottom of valve body 1a is fixed with spring base 3, and spring 1d one end is resisted against on the spring base 3, and the other end is resisted against on the spool 1c, has the gag lever post 3a that restraining spring 1d swings on the spring base 3.
Embodiment two
The structure of embodiment two and principle and embodiment one basic simlarity, as shown in Figure 5, be damping structure with the difference of embodiment one, the damping structure of embodiment two comprises the three circulation passage 1c3 that are opened in the spool 1c, three circulation passage 1c3, one end can be connected with transmission groove 1b1, the other end can be connected with the outlet 1a1 of expansion valve component 1, also has an end to be connected with the inner chamber 1a2 of valve body 1a.Compare embodiment one, cancelled the setting of throttling pore 1b2.
Embodiment three
The structure of embodiment three and principle and embodiment two basic simlarities, as shown in Figure 6, be damping structure with the difference of embodiment two, the damping structure of embodiment three comprises the two circulation passage 1c4 that are opened in the spool 1c, described two circulation passage 1c4, one end can be connected with transmission groove 1b1, and the other end can be connected with the inner chamber 1a2 of valve body 1a.Compare embodiment two, embodiment three cancelled spool 1c inner with outlet 1a1 between the transmission relation of cold-producing medium, direct slit flow mistake between the two.
Embodiment four
The structure of embodiment four and principle and embodiment one basic simlarity, as shown in Figure 7, difference is damping structure, and it comprises the centre bore 1c5 that axially runs through spool 1c and the rear side opening 1c6 that is connected with centre bore 1c5, and the end of rear side opening 1c6 can be connected with the outlet 1a1 of expansion valve component 1.
Embodiment five
Such as Fig. 8, Fig. 9, shown in Figure 10, embodiment five improves on the basis of embodiment four, damping structure comprises the centre bore 1c5 that axially runs through spool 1c and the rear side opening 1c6 that is connected with centre bore 1c5, the end of rear side opening 1c6 can be connected with the outlet 1a1 of expansion valve component 1, centre bore 1c5 axially on also offer installing hole, be provided with inner spool 10 and little spring 11 in the installing hole.The port riveted joint of installing hole has back-up ring, and inner spool 10 and little spring 11 are fixed in the installing hole.The diameter of centre bore 1c5 is less than installing hole, so form the gear edge in the inside of spool 1c.Inner spool 10 is close to the gear edge under the active force of little spring 11, blocked being communicated with of centre bore 1c5 and rear side opening 1c6.Offer guiding gutter 10a on the outer cylinder of inner spool 10, leave gear can arrive through guiding gutter 10a valve body 1a along rear cold-producing medium inner chamber 1a2 at inner spool 10.
Refrigerant flow hour, inner spool 10 preferentially is open, cold-producing medium enters centre bore 1c5, arrives the outlet 1a1 of expansion valve component 1 from rear side opening 1c6 again.When refrigerant flow was larger, spool 1c broke away from valve seat 1b, and most of cold-producing medium passes through from the slit between valve seat 1b and the spool 1c.Cold-producing medium passes back-up ring through centre bore 1c5, again by the guiding gutter 10a of inner spool 10, reaches at last the inner chamber 1a2 of valve body 1a, has certain damping action, reasonable cushioning effect is arranged when spool 1c is lifted off a seat 1b, prevent that spring 1d from producing vibration, reduces the noise of spring 1d.
Embodiment six
As shown in figure 11, the structure basic simlarity of embodiment six and embodiment one, it is a kind of deformation program of embodiment one, the throttling pore 1b2 of valve seat among the cancellation embodiment one, open bar-shaped trough one 1c7 at the outer surface of spool 1c, when itself and valve seat 1b were leant, cold-producing medium still can pass through from bar-shaped trough one 1c7 between valve seat 1b and the spool 1c, enters into transmission groove 1b1.
Embodiment seven
As shown in figure 12, the structure basic simlarity of embodiment seven and embodiment one, it is a kind of deformation program of embodiment one, the throttling pore 1b2 of valve seat among the cancellation embodiment one, open bar-shaped trough 1b3 at the outer surface of valve seat 1b, when itself and valve seat 1c were leant, cold-producing medium still can pass through from the bar-shaped trough 1b3 between valve seat 1b and the spool 1c, enters into transmission groove 1b1.
As shown in figure 13; this case single ported thermostatic expansion valve comprises above-mentioned expansion valve component 1 and is enclosed within the outer protective cover 6 of valve body 1a; offer the interface 6a relative with the outlet 1a1 of valve body 1a at protective cover 6, be fixed with out pipe 12 on the described interface 6a, be fixed with inlet pipe 8 at the import 1a3 place of valve body 1a.
Interface 6a place has outside flange, goes out pipe 12 and is connected with flanging welded.Be fixed with net-filter assembly 9 in the inlet pipe 8, net-filter assembly 9 comprises the rack that is fixed in the inlet pipe and the filter screen that is attached on the rack.
Such as Figure 14, shown in Figure 15; originally the expansion valve that two-way circulates comprises the valve piece 2 with two passage 2a parallel to each other; the port of export 2d of each passage 2a all is connected with expansion valve component 1; offer the by-pass prot 2c that the outlet 1a1 that makes the expansion valve component 1 on the passage 2a is connected with the entrance point 2b of another passage 2a on the valve piece 2, also be welded with at port of export place and prevent the protective cover that leaks when MEDIA FLOW is between by-pass prot and outlet.
Specifically, be equipped with the spacer ring 4 for the import that intercepts expansion valve component 1 and outlet 1a1 in two passage 2a of valve piece 2, spacer ring 4 is made for encapsulant.Expansion valve component 1 outside cover has protective cover 6, and protective cover 6 welding are connected in the port of export 2d of passage 2a.The entrance point 2b of passage 2a is fixed with valve gap 7, and welding is fixed with inlet pipe 8 on the valve gap 7, is fixed with net-filter assembly 9 in the inlet pipe 8, and net-filter assembly 9 comprises the rack that is fixed in the inlet pipe 8 and the filter screen that is attached on the rack.
The entrance point 2b of cold-producing medium admission passage 2a, when flow hour, cold-producing medium arrives transmission groove 1b1 by the anterior throttling pore 1b2 of valve seat 1b, and three circulation passage 1c3 by on the spool 1c flow out this valve at last.Cold-producing medium arrives the inner chamber 1a2 of valve body 1a simultaneously, guarantees that the outlet 1a1 pressure of inner chamber 1a2 and expansion valve component 1 is consistent.If this moment, refrigeration plant just started, the import of expansion valve component 1 and outlet 1a1 pressure differential do not reach the refrigeration plant designing requirement, therefore the refrigerating efficiency of refrigeration plant is very low.Refrigeration plant passes through signal processing and analysis according to designing requirement, compressor passes through progressively enlargement discharge, import 1a3 and outlet 1a1 pressure differential reach designing requirement, rush of current when so both avoiding compressor start, again less than the circulation expansion valve response speed, give full play to the effect of this expansion valve, for the efficient that improves air-conditioning is given security.
When refrigerant flow increased gradually, the entrance point 2b pressure of passage 2a raise, and the outlet 1a1 of expansion valve component 1 is the evaporating pressure of cold-producing medium, and then entrance point 2b and outlet 1a1 pressure differential increase.When entrance point 2b reaches the certain pressure degree with outlet 1a1 pressure differential, pressure differential is greater than the elastic force of spring 1d, spool 1c moves and away from valve seat 1b, the slit that cold-producing medium can also enter between valve seat 1b and the spool 1c arrives outlet 1a1, by-pass prot 2c through valve piece 2 is discharged among the entrance point 2b of another passage 2a.Spool 1c off-load this moment has guaranteed that passage 2a entrance point 2b is relative constant with outlet 1a1 pressure differential.
Along with flow continues to increase, spool 1c continues away from valve seat 1b, and the slit of valve seat 1b and spool 1c is increasing, until gag lever post 3a or spring 1d that spool 1c is against on the spring base 3 reach compression limit.Refrigeration plant this moment power output under maximum delivery efficiency state reaches peak value, is the specified peak power output of the expansion valve that originally two-way circulates.If refrigerant flow also will increase, then the air-conditioner duty worsens, and refrigerating efficiency reduces.Simultaneously because the existence of the inner chamber 1a2 that damping ring 5, spool 1c and valve body 1a form has certain damping action, so that spool 1c can instantaneous movement, overcome the vibration that the cold-producing medium TRANSFER BY PULSATING FLOW causes spool 1c and spring 1d.
When refrigeration plant reaches design temperature, equipment passes through signal processing and analysis according to designing requirement, compressor gradually reduces the flow of cold-producing medium, the entrance point 2b pressure of passage 2a decreases, and the outlet 1a1 of expansion valve component 1 is the evaporating pressure of cold-producing medium, and then entrance point 2b and outlet 1a1 pressure differential reduce.Therefore under the elastic force effect of spring 1d, spool 1c is close to valve seat 1b.The flow that cold-producing medium passes through from the slit between valve seat 1b and the spool 1c reduces, and the flow of discharge also reduces thereupon.Then passage 2a entrance point 2b pressure gos up, and guarantees that entrance point 2b is relative constant with outlet 1a1 pressure differential.This process flow reduces speed can not be greater than the response speed that two-way circulates and expand, otherwise also can reduce the efficient of refrigeration plant.
Along with refrigerant flow continues to reduce, the pressure of passage 2a entrance point 2b continues to reduce.Under the effect of spring 1d elastic force, spool 1c contacts with valve seat 1b, damping cavity before the space that formed at transmission groove 1b1 place by valve seat 1b and spool 1c this moment becomes, so that the head 1c1 of spool 1c can not strike on the taper hole hole wall of valve seat 1b very soon, reduce the impact of spool 1c, increase its service life.This moment, refrigeration plant reached keeping warm mode, if select suitable throttling pore 1b2 and refrigeration space coupling, spool 1c can be failure to actuate, and spool 1c non-action state is the specified minimum output power of the expansion valve that originally two-way circulates.
Specific embodiment described herein only is to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.

Claims (16)

1. expansion valve component, comprise have import (1a3) and outlet (1a1) valve body (1a), be fixed on valve seat (1b), the spool (1c) in the valve body (1a) and spool (1c) had to the spring (1d) of valve seat (1b) mobile trend, it is characterized in that, described spool (1c) has cone shape head (1c1), offer the taper hole that is complementary with spool (1c) head (1c1) on the described valve seat (1b), be provided with the damping structure that can have cushioning effect to spool (1c) between described spool (1c) and the valve seat (1b).
2. expansion valve component according to claim 1, it is characterized in that, described valve body (1a) is straight-tube shape, import (1a3) is positioned at the port of straight-tube shape valve body (1a), outlet (1a1) is opened on the sidewall of valve body (1a), the afterbody (1c2) of described spool (1c) has cylinder and the damping annular groove very little with valve body (1a) fit clearance, and described damping annular groove is equipped with the damping ring (5) of an opening.
3. expansion valve component according to claim 2, it is characterized in that, the head (1c1) of described spool (1c) has front cylinder (1c8), prosthomere flow cone (1c9), transition cone, rear cylinder (1c10), deutomerite flow cone (1c11) successively, and the taper hole of described valve seat (1b) has front cylindrical hole (1b4), prosthomere flow cone hole (1b5), transmission groove (1b1), rear cylindrical hole (1b6) and the deutomerite flow cone hole (1b7) that is complementary with spool (1c) head (1c1) successively.
4. expansion valve component according to claim 3, it is characterized in that, described damping structure comprises three circulation passage (1c3) that are opened in the spool (1c), described three circulation passage (1c3) end can be connected with transmission groove (1b1), the other end can be connected with the outlet (1a1) of valve body (1a), also has an end to be connected with the rear damping cavity of valve body (1a).Also offer the throttling pore (1b2) that is communicated with transmission groove (1b1) and passage (2a) entrance point (2b) on the described valve seat (1b).
5. expansion valve component according to claim 4 is characterized in that, studs with capillary in the described throttling pore (1b2).
6. expansion valve component according to claim 5 is characterized in that, described throttling pore (1b2) also is plugged with straight tube.
7. according to claim 4 or 5 or 6 described expansion valve component, it is characterized in that, inner chamber (1a2) bottom of described valve body (1a) is fixed with spring base (3), described spring (1d) end is resisted against on the spring base (3), the other end is resisted against on the spool (1c), has the gag lever post (3a) that restraining spring (1d) swings on the described spring base (3).
8. expansion valve component according to claim 3, it is characterized in that, described damping structure comprises three circulation passage (1c3) that are opened in the spool (1c), described three circulation passage (1c3) end can be connected with transmission groove (1b1), the other end can be connected with the outlet (1a1) of valve body (1a), also has an end to be connected with the inner chamber (1a2) of valve body (1a).
9. expansion valve component according to claim 3, it is characterized in that, described damping structure comprises two circulation passage (1c4) that are opened in the spool (1c), described two circulation passage (1c4) end can be connected with transmission groove (1b1), and the other end can be connected with the inner chamber (1a2) of valve body (1a).
10. expansion valve component according to claim 3, it is characterized in that, described damping structure comprises the centre bore (1c5) that axially runs through spool (1c) and the rear side opening (1c6) that is connected with centre bore (1c5), and an end of rear side opening (1c6) can be connected with the outlet (1a1) of valve body (1a).
11. single ported thermostatic expansion valve; it is characterized in that; this single ported thermostatic expansion valve comprises above-mentioned expansion valve component (1) and is enclosed within the outer protective cover (6) of valve body (1a); offer the interface (6a) relative with the outlet (1a1) of valve body (1a) at protective cover (6); be fixed with out pipe (12) on the described interface (6a), locate to be fixed with inlet pipe (8) in the import (1a3) of valve body (1a).
12. single ported thermostatic expansion valve according to claim 11 is characterized in that, described interface (6a) locates to have outside flange, goes out pipe (12) and is connected with flanging welded.
13. single ported thermostatic expansion valve according to claim 12 is characterized in that, is fixed with net-filter assembly (9) in the described inlet pipe (8), described net-filter assembly (9) comprises the rack that is fixed in the inlet pipe (8) and the filter screen that is attached on the rack.
14. expansion valve that two-way circulates; it is characterized in that; originally the expansion valve that two-way circulates comprises the valve piece (2) with two passages parallel to each other (2a); each passage (2a) has entrance point (2b) and the port of export (2d); each described port of export (2d) locates all to be connected with above-mentioned expansion valve component (1); offer the by-pass prot (2c) that the outlet (1a1) of the expansion valve component (1) that makes on the passage (2a) is connected with the entrance point (2b) of another passage (2a) on the described valve piece (2), locate also to be welded with the protective cover (6) that leaks when preventing that MEDIA FLOW is between by-pass prot (2c) and outlet (1a1) at the described port of export (2d).
15. the expansion valve that two-way circulates according to claim 14 is characterized in that, is equipped with the spacer ring (4) for the import (1a3) that intercepts expansion valve component (1) and outlet (1a1) in two passages (2a) of described valve piece (2).
16. the expansion valve that two-way circulates according to claim 15, it is characterized in that, entrance point (2b) and the port of export (2d) of described valve piece (2) all are fixed with valve gap (7), the upper welding of valve gap (7) is fixed with inlet pipe (8) and goes out pipe (12), described inlet pipe (8) and go out all to be fixed with in the pipe (12) the described net-filter assembly of net-filter assembly (9) (9) and comprise and be fixed on inlet pipe (8) and go out to manage (12) interior rack and be attached to filter screen on the rack.
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PCT/CN2013/084571 WO2014063559A1 (en) 2012-10-26 2013-09-29 Expansion valve assembly and one-way expansion valve and two-way flowing expansion valve

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CN111102769A (en) * 2018-10-29 2020-05-05 奥克斯空调股份有限公司 Throttling device and air conditioner
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WO2020147628A1 (en) * 2019-01-18 2020-07-23 宁波奥克斯电气股份有限公司 Adaptive throttling device and air conditioner
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