CN1161420A - Direction change valve for refrigerant fluid - Google Patents
Direction change valve for refrigerant fluid Download PDFInfo
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- CN1161420A CN1161420A CN 97100270 CN97100270A CN1161420A CN 1161420 A CN1161420 A CN 1161420A CN 97100270 CN97100270 CN 97100270 CN 97100270 A CN97100270 A CN 97100270A CN 1161420 A CN1161420 A CN 1161420A
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Abstract
The invented refrigerant fluid selector valve includes a cylindrical valve body with its two ends closed and a basically cylindrical valve core which is set in the valve cavity of the cylindrical valve body. The outer surface of the valve core has a cyclic concave channel and the center of the valve core has a longitudinal cavity which is connected with the valve cavity of the cyclic concave cavity. The cyclic concave channel on the surface of the selector valve core causes the sealing surface area between valve core and valve body reduced greatly, thus lowers the sliding resistance of valve core and raises the flexiblity of reversing. The longitudinal cavity of selector valve possesses of symmetrical shaft structure, so that it is even in stress and do not occur deformation even under very high temp. difference and pressure difference thus enhances the reliability of reversing.
Description
The present invention relates to guiding valve, relate in particular to a kind of heat pump direction change valve for refrigerant fluid.
In the refrigeration system of using coolant compressor, condensation of refrigerant heat exchanger and refrigeration agent evaporating heat exchanger, extensively utilize fluid diverter valve.In this system, the compressor compresses gas refrigerant, and it is drained into the condensation of refrigerant heat exchanger with the form of high temperature and high pressure gas.In the condensation of refrigerant heat exchanger, high-temperature high-pressure gas refrigerant conducts its heat to condensation of refrigerant heat exchanger ambient air and is condensed, form with highly pressurised liquid is discharged from the condensation of refrigerant heat exchanger, make condensation of refrigerant consequently ambient gas be heated by refrigerant heat exchanger.
Then, liquid refrigerant through one by the expansion valve of fluid throttling form and in the refrigeration agent evaporating heat exchanger, carry out low pressure evaporation the required heat of liquid refrigerant evaporates is conducted to liquid refrigerant by refrigeration agent evaporating heat exchanger ambient air, thereby the refrigerant heat exchanger ambient air is cooled.The gas refrigerant of discharging from the refrigeration agent evaporating heat exchanger flows into the suction port of compressor, begins next refrigeration cycle.
The occasion of refrigeration system, change the flow direction of refrigeration agent, like this as so-called heat pump, a heat exchanger both can be used to vaporized refrigerant, thereby the air of cooling conditioned space can be used to condensating refrigerant again when it is warm, thus in the sky air of cold time heating conditioned space.
The flow direction that changes refrigeration agent can be realized by handling a direction change valve for refrigerant fluid.Typical fluid diverter valve has first short tube that is communicated with the outlet of compressor, and second short tube that is communicated with the inlet of compressor reaches the 3rd short tube and the 4th short tube that is communicated with separately heat exchanger.This fluid diverter valve comprises a spool.This spool makes the refrigeration agent of discharging from compressor flow to the heat exchanger one, and the outlet of another heat exchanger is communicated with the inlet of compressor.Make this spool action just can the change flow direction of refrigeration agent in these heat exchangers.
Direction change valve for refrigerant fluid also can be used in the refrigeration system, is used for changing at short notice the flow direction of refrigeration agent, makes warm refrigerant gas flow into the refrigeration agent evaporating heat exchanger, to its defrosting.
Have multiple refrigeration agent selector valve structure in the prior art, but many structures are in commercial not success, this is to use required performance index because they can not satisfy.The spool of direction change valve for refrigerant fluid is bearing the effect of the very big pressure reduction between the entrance and exit that is present in compressor unchangeably, thereby requires the direction change valve for refrigerant fluid must can easy operating under the effect of this pressure reduction.And the spool of direction change valve for refrigerant fluid is bearing the high temperature refrigerant that is present in evaporating heat exchanger unchangeably and is being transported to the effect of the great temperature gradient between the low-temperature refrigerant of condensing heat exchanger.In addition, the high-pressure refrigerant that only allows minute quantity leaks into the inlet of compressor, so that system works efficient reaches to greatest extent, and the action fast and reliably between the two positions of this spool.
Patent documentation US4366194 discloses a kind of heat pump four-way fluid reversing slide valve.This valve comprises a valve body.Valve body has a valve pocket and a support platform.Valve pocket is communicated with the coolant compressor outlet through first short tube.Have second short tube, the 3rd short tube and the 4th short tube on the platform.Second short tube is communicated with the inlet of coolant compressor.A shell-type spool is arranged on platform, can on platform, move.When shell-type spool during, first short tube is communicated with the 3rd short tube with the 4th short tube and second short tube in first position; When shell-type spool during, first short tube is communicated with the 4th short tube with the 3rd short tube and second short tube second position.In this valve, between shell-type spool and support platform, form the planar slide sealing.As mentioned above,, can make spool and support platform easy deformation, thereby make the planar slide sealing destroyed owing to inside and outside the shell-type spool very big temperature difference and pressure difference are arranged.And, because the sealing force of the planar slide that forms between shell-type spool and support platform sealing is produced by aforesaid pressure difference fully, too high in pressure difference, cross under the situation of low or fluctuation, the sealing force instability, can not form desirable sealing, thereby produce aforesaid unallowed leakage.In addition, owing to excessive pressure official post shell-type spool is difficult to be dragged, thereby it is dumb to cause the shell-type spool to slide on support platform, even under the slip Halfway Stopping, forms permanent " short circuit ", and heat pump can't be worked.
Patent documentation CN2135087Y discloses a kind of heat pump air conditioner four-way change-over valve.This valve comprises a valve body, and valve body has a valve pocket.Upside at valve body has first short tube, and first short tube is communicated with the outlet of coolant compressor.Downside at valve body has second short tube, the 3rd short tube and the 4th short tube, and second short tube is communicated with the inlet of coolant compressor.A cylindrical spool is arranged in valve pocket.Upside at cylindrical spool has a vertical straight trough, and it is facing to first short tube of valve body upside.Each have a crosspassage that is communicated with vertical straight trough at the two ends of vertical straight trough, they can face toward the 3rd short tube and the 4th short tube of the downside of valve body respectively.Downside at cylindrical spool has a hemispherical groove, and its directly is not communicated with vertically straight trough and crosspassage, and can face toward second short tube and the 3rd short tube or second short tube and the 4th short tube of valve body downside.In this valve, between cylindrical spool and valve body, form the arc surface slipper seal.Because cylindrical spool is except that its vertical straight trough and the arc surface of hemispherical groove, other arc surface contacts with valve seal fully, and the area of surface of contact is big, the commutation action resistance of cylindrical spool is big, it is not rapid to commutate, even the Halfway Stopping commutation, and heat pump can not be worked.And because the upside of cylindrical spool has vertical straight trough, downside has hemispherical groove, and its structure is asymmetric, easily deforms under aforesaid temperature difference and action of pressure, thereby sealing and commutation ability are destroyed.In addition, because the upside of cylindrical spool has vertical straight trough, it is communicated with the coolant compressor outlet by first short tube at the valve body upside, high pressure, high temperature refrigerant gas acts on the cylindrical spool, because the vertically existence of straight trough makes making a concerted effort downwards of cylindrical spool pressure, thereby it is pressed on valve body following half side, this can make between cylindrical spool and valve body last half side and the gap occur, destroys sealing, influences the proper functioning of valve.
The purpose of this invention is to provide a kind of can thoroughly eliminate spool that above-mentioned high pressure difference and high-temperature difference caused stressed asymmetric, dumb reliable direction change valve for refrigerant fluid easily deforms, commutates.
The objective of the invention is to realize by direction change valve for refrigerant fluid with following structure.
Direction change valve for refrigerant fluid of the present invention comprises:
A) cylinder valve of a closed at both ends, it defines a valve pocket;
B) first short tube on the cylinder valve wall, it is communicated with the outlet of coolant compressor;
C) second short tube on the cylinder valve wall, it is communicated with the inlet of coolant compressor;
D) one at the 3rd short tube and the 4th short tube on the cylinder valve wall on the cylinder valve wall, and they are communicated with separately heat exchanger respectively;
E) one is positioned at the columniform spool of being essentially of valve pocket, it can slide on the inner wall sealing ground along cylinder valve in valve pocket, make the refrigeration agent of discharging flow to a heat exchanger from coolant compressor, the outlet of another heat exchanger is communicated with the inlet of coolant compressor, makes this spool action can change the flow direction of refrigeration agent in these two heat exchangers;
F) a plurality of capillary tubies, they make this valve be communicated with the actuating solenoid valve of this valve;
Its improvements are:
G) external cylindrical surface of said spool has a middle circle annular groove, and the center of said spool has a vertical cavity that is communicated with the valve pocket of middle circle annular groove both sides.
Preferably, the two ends, the left and right sides of vertical cavity of said spool are sealed, left and right two toroidal cavities are arranged in the both sides of middle circle annular groove, respectively have several through holes on the bottom land wall of left and right toroidal cavity, vertically cavity is communicated with the valve pocket of middle circle annular groove both sides by these through holes.
Preferably, the left end of vertical cavity of said spool seals, right-hand member is an opening, the part that spool is positioned at the left side of middle circle annular groove forms the left cylindrical shape part of sealing, have several through holes on the wall of left cylindrical shape part, vertically cavity is communicated with the valve pocket of middle circle annular groove both sides by opening and these through holes of its right-hand member.
Direction change valve for refrigerant fluid of the present invention is compared with four-way change-over valve with above-mentioned existing heat pump air conditioner, has following advantage: because the periphery of change-over valve core has annular recess, sealing surface area between spool and valve body is significantly reduced, thereby reduced the slip resistance of spool, improved the flexibility of commutation; Because change-over valve core has vertical cavity, especially have axially symmetric structure, thereby, stressedly evenly do not produce distortion even make it under very high temperature difference and very big action of pressure, improved the reliability that commutates.
Fig. 1 is the longitudinal section of the direction change valve for refrigerant fluid of first embodiment of the invention;
Fig. 2 is the longitudinal section of the direction change valve for refrigerant fluid of second embodiment of the invention;
Fig. 3 is that expression is arranged on longitudinal section on the valve body with the capillary tube on first short tube of second embodiment's direction change valve for refrigerant fluid of the present invention;
Fig. 4 is that expression is arranged on longitudinal section on the valve body with the capillary tube on first and second short tubes of second embodiment's direction change valve for refrigerant fluid of the present invention;
Fig. 5 is the longitudinal section of expression as the solenoid valve of the actuator of direction change valve for refrigerant fluid of the present invention;
Fig. 6 is first embodiment's of the present invention fluid diverter valve and the longitudinal section of solenoid valve thereof;
Fig. 7 is second embodiment's of the present invention fluid diverter valve and the longitudinal section of solenoid valve thereof;
Fig. 8 is expression first embodiment's of the present invention fluid diverter valve is in a certain instantaneous position in commutation process a longitudinal section;
Below, in conjunction with the drawings to the description that embodiments of the invention carried out, above-mentioned purpose, feature and advantage with other of the present invention will become more obvious.
Referring to Fig. 1, the direction change valve for refrigerant fluid of first embodiment of the invention comprises a valve body 1 and a spool 2 that is contained in the valve body 1.
Valve body 1 has cylindrical wall 15, and its two ends have first member plate 16 and right end plate 17, produces permanent deformation or welding by the two ends that make cylindrical wall 15, thereby is sealedly and fixedly connected with first member plate 16 and right end plate 17 formation.
The cylindrical wall 15 of valve body 1 defines valve pocket 18.Four short tubes that communicate with valve pocket 18 are arranged on cylindrical wall 15: first short tube 11, it is communicated with the outlet of coolant compressor (not shown); Second short tube 12, it is communicated with the inlet of coolant compressor; The 3rd short tube 13 and the 4th short tube 14, they are communicated with separately heat exchanger (not shown) respectively.These four short tubes 11,12,13 and 14 center line can be on same buses of cylindrical wall 18, also can be not on same bus.There is a definite sequence this four short tubes 11,12,13 and 14 position on cylindrical body 18, promptly from left to right be first short tube 11, the 3rd short tube 13, second short tube 12 and the 4th short tube 14, and any two adjacent short tubes can not a little overlap on the same cross section of cylindrical wall 15 with the interface of cylindrical wall 15, four short tubes 11,12,13 and 14 and the interface position of cylindrical wall 15 should form roundlet arc r.In addition, on the cylindrical wall 15 at the two end part of valve body 1, capillary tube 151 and capillary tube 152 are arranged, on first short tube 11, capillary tube 111 is arranged, on second short tube 12, capillary tube 121 is arranged.
As shown in Figure 1, spool 2 is essentially cylindrical, is made by plastic materialss such as polytetrafluoroethylplastic plastics.The center of spool 2 is vertical cavity 22 of two ends sealing.Form the middle circle annular groove 25 of a predetermined width at the periphery of spool 2.Periphery in the both sides of middle circle annular groove forms the left toroidal cavity 23 of a predetermined width and the right toroidal cavity 27 of a predetermined width.Respectively having several through holes 231,271 on the cylindrical wall of groove bottom of a left side, stone toroidal cavity 23,27, is left and right toroidal cavity 23,27 spatial communication that limited thereby make the vertical cavity 22 and the valve pocket 18 of middle circle ring groove 25 both sides.Spool 2 can slide in valve body 1, contacts to the internal surface fluid-tight of each periphery of spool 2 and the cylindrical wall 15 of valve body 1.The two ends of spool 2 have left boss 28 and right boss 29 respectively, to determine the position of spool 2 in valve body 1.
Referring to Fig. 2, the direction change valve for refrigerant fluid of second embodiment of the invention comprises a valve body 3 and a spool 4 that is contained in the valve body 3.
The structure of the structure of valve body 3 and first embodiment's valve body 1 is basic identical, and therefore, identical part is represented with same reference character, and is not repeated in this description.
Valve body 3 is that with the difference of valve body 1 dividing plate 32 with a center hole 31 is set, and dividing plate 32 and first member plate 16 separate an intended distance in the left end portion of valve body 3, thereby limits a piston chamber 33 between them.In addition, left capillary tube 331 and right capillary tube 332 are arranged on the cylindrical wall 15 of piston chamber's 33 two end portions.
As shown in Figure 2, spool 4 has a metal tube 41, and metal tube 41 limits a vertical cavity 42.On metal tube 41, fix two columniform polytetrafluoroethylplastic plastics or other plastic materials piece 43,44.Cylindrical piece 43 and cylindrical piece 44 separate an intended distance, and they and metal tube 41 limit middle circle annular grooves 45 jointly.At the fixedly connected left end cap 26 of the left end of metal tube 41, for example can be by being threaded or welding, thus form the left cylindrical portions may 47 of a sealing in the left side of middle circle annular groove 45.Have several through holes 471 on the cylindrical wall of left cylindrical portions may 47, the opening 421 of through hole 471 and vertical cavity 42 right-hand members makes vertical cavity 42 be communicated with the valve pocket 18 of middle circle annular groove 45 both sides.Spool 4 can slide in valve body 3, the periphery of spool 4 be cylindrical piece 43,44 periphery and the cylindrical wall 15 of valve body 3 the internal surface fluid-tight contact.
A piston 34 is arranged in the piston chamber 33 of valve body 3, and piston 34 can slide in valve body 3, with the internal surface fluid-tight of the cylindrical wall 15 of valve body 3 contact.One piston rod 35 passes the center hole 31 of the dividing plate 32 in the valve body 3, and its left end is fixedlyed connected with piston 34, and its right-hand member is fixedlyed connected with the left end cap 46 of spool 4.Also can a flange sleeve 321 be installed at center hole 31 internal fixation of dividing plate 32, piston rod 35 can slide in the center hole 31 of dividing plate 32 or in flange sleeve 321 bore fluid hermetically.
As illustrated in fig. 1 and 2, on first short tube 11 of valve body 1 and 3, capillary tube 111 is arranged, on second short tube 12, capillary tube 121 is arranged.Yet, can capillary tube 111,121 be arranged on the short tube 11,12 yet, and be set directly on the valve body 1 capillary tube 111 as shown in Figure 3 and capillary tube shown in Figure 4 111,121.In such cases, the axis that is arranged on the capillary tube 111,121 on the valve body 3 respectively with the axis of short tube 11,12 in same cross section or in the adjacent very near cross section with this cross section.
As illustrated in fig. 1 and 2, if the internal diameter of the short tube of valve body 1 and 3 11,12,13,14 is φ, the radius of the little circular arc that the interface position of they and cylindrical wall 15 forms is r, the axial width of each ring sidewall 251,252,451,452 of the middle circle annular groove 25,45 of spool 2,4 is δ, then should satisfy relation 0.9 φ＜δ≤φ+2r between δ, φ and the r.
Fig. 5 represents a solenoid valve 7, and it can be used as guide's braking device of direction change valve for refrigerant fluid of the present invention, also can be directly as the fluid solenoid directional control valve of small capacity refrigeration plant.
Solenoid valve 7 comprises that 72, one spools 73 that can sealably slide of 71, one valve bodies of electromagnetic coil that are used to produce magnetic field and one when magnetic field disappears, make spool 73 get back to the Returnning spring 74 of initial position in valve body 72.
The structure of the structure of valve body 72 and the valve body of the direction change valve for refrigerant fluid of the present invention shown in Fig. 1 and 21,3 is similar, and it has the valve pocket 726 that limited by cylindrical wall 725 and first capillary tube 721, second capillary tube 722, three capillary 723 and the 4th capillary tube 724 on cylindrical wall 725.Four capillary tubies of this of solenoid valve 7 721,722,723,724 link to each other with four capillary tubies of direction change valve for refrigerant fluid of the present invention respectively.
The structure of the spool 4 of the structure of spool 73 and direction change valve for refrigerant fluid of the present invention shown in Figure 2 is similar, vertical cavity 732 that it has middle circle annular groove 731 and communicates with the valve pocket 726 of middle circle annular groove 731 both sides.
Fig. 6 is the direction change valve for refrigerant fluid of first embodiment of the invention and as the longitudinal section of the solenoid valve 7 of its actuator.The working procedure of this selector valve is described below with reference to Fig. 6.State shown in Figure 6 does not have electric current to pass through in the electromagnetic coil of solenoid valve 7, and magnetic field disappears, and Returnning spring 74 will be shifted leftmost position onto at the spool in the valve body 72 73.At this moment, enter first capillary tube 721 of solenoid valve 7 through first short tube 11 of direction change valve for refrigerant fluid from the high-temperature high-pressure gas refrigerant of coolant compressor, under the control of solenoid valve 7, enter in the valve pocket 18 of direction change valve for refrigerant fluid right-hand member from the 4th capillary tube 724 of solenoid valve 7, shift spool 2 onto left end, under this state, the glide path of refrigeration agent is: coolant compressor outlet (not shown) → first short tube 11 → left toroidal cavity 23 → through hole 231 → vertical cavity 22 → through hole 271 → 25 → the second short tube 12 → coolant compressors inlets of right toroidal cavity 271 → 4th short tube 14 → condensation of refrigerant heat exchanger (not shown) → refrigeration agent evaporating heat exchanger (not shown) → 3rd short tube 13 → middle circle annular groove (not shown).
When the electromagnetic coil of solenoid valve 7 has electric current to pass through, produce magnetic field, spool 73 is kept out the elastic force of Returnning spring 74 under the effect of magnetic force, arrive rightmost position.At this moment, enter first capillary tube 721 of solenoid valve through first short tube 11 of direction change valve for refrigerant fluid from the high-temperature high-pressure gas refrigerant of coolant compressor, under the control of solenoid valve 7, enter in the valve pocket 18 of direction change valve for refrigerant fluid left end from second capillary tube 722 of solenoid valve 7, shift spool 2 onto right-hand member.Under this state, the glide path of refrigeration agent is: coolant compressor outlet → first short tube 11 → 25 → the second short tube 12 → coolant compressor inlets of left toroidal cavity 23 → 3rd short tube 13 → refrigeration agent evaporating heat exchanger → condensation of refrigerant heat exchanger → 4 short tube 14 → middle circle annular groove.
Fig. 7 is the direction change valve for refrigerant fluid of second embodiment of the invention and as the longitudinal section of the solenoid valve 7 of its actuator.As we can see from the figure, under the control of solenoid valve 7, high-temperature high-pressure gas refrigerant from coolant compressor enters piston chamber 33 through first short tube 11 of direction change valve for refrigerant fluid, or enter from left capillary tube 331, or enter from right capillary tube 332, correspondingly promote piston 34 or left to the right, piston 34 drives spools 4 or be moved to the left to the right by piston rod 35, realize commutation, thereby as mentioned above, change the flow direction of refrigeration agent in condensation of refrigerant heat exchanger and refrigeration agent evaporating heat exchanger.
Fig. 8 represents that direction change valve for refrigerant fluid of the present invention is in the longitudinal section of a certain instantaneous position in commutation process.At shown position, under above-mentioned δ=φ+2r condition, two ring sidewalls 251,252 of the middle circle annular groove 25 of spool 2 are blocked the interface of the 3rd short tube 13 and the 4th short tube 14 and cylindrical wall 15 respectively, cause heat pump moment to be opened circuit fully.At this moment, the pressure of the high-temperature high-pressure gas refrigerant in first short tube 11 raises, refrigerant fluid pressure in the valve pocket 18 of spool 2 left ends raises thereupon, refrigerant fluid pressure in the valve pocket 18 of right-hand member reduces, thereby, effect lower valve core 2 at two ends, left and right sides pressure reduction slides to the right rapidly, realizes thoroughly commutation.
In addition, except that adopting the actuator of solenoid valve 7 as direction change valve for refrigerant fluid of the present invention shown in Figure 5, also can adopt the actuator of the solenoid valve of the solenoid valve of above-mentioned prior art or other prior art as direction change valve for refrigerant fluid of the present invention, the mechanism that also available electromagnet, gear-tooth bar or other generation are moved directly drags the spool of direction change valve for refrigerant fluid of the present invention, it can be moved back and forth, realize commutation.
Claims (7)
1. direction change valve for refrigerant fluid of the present invention comprises:
A) cylinder valve of a closed at both ends, it defines a valve pocket;
B) first short tube on the cylinder valve wall, it is communicated with the outlet of coolant compressor;
C) second short tube on the cylinder valve wall, it is communicated with the inlet of coolant compressor;
D) one at the 3rd short tube and the 4th short tube on the cylinder valve wall on the cylinder valve wall, and they are communicated with separately heat exchanger respectively;
E) one is positioned at the columniform spool of being essentially of valve pocket, it can slide on the inner wall sealing ground along cylinder valve in valve pocket, make the refrigeration agent of discharging flow to a heat exchanger from coolant compressor, the outlet of another heat exchanger is communicated with the inlet of coolant compressor, makes this spool action can change the flow direction of refrigeration agent in these two heat exchangers;
F) a plurality of capillary tubies, they make this valve be communicated with the actuating solenoid valve of this valve; It is characterized in that:
G) external cylindrical surface of said spool has a middle circle annular groove, and the center of said spool has the vertical cavity that is communicated with the valve pocket of middle circle annular groove both sides.
2. according to the described direction change valve for refrigerant fluid of claim 1, it is characterized in that, the two ends, the left and right sides of vertical cavity of said spool are sealed, left and right two toroidal cavities are arranged in the both sides of middle circle annular groove, respectively have several through holes on the bottom land wall of left and right toroidal cavity, vertically cavity is communicated with the valve pocket of middle circle annular groove both sides by these through holes.
3. according to the described direction change valve for refrigerant fluid of claim 1, it is characterized in that, the left end of vertical cavity of said spool seals, right-hand member is an opening, the part that spool is positioned at the left side of middle circle annular groove forms the left cylindrical shape part of sealing, have several through holes on the wall of left cylindrical shape part, vertically cavity is communicated with the valve pocket of middle circle annular groove both sides by opening and these through holes of its right-hand member.
4. according to the described direction change valve for refrigerant fluid of claim 2, it is characterized in that, said capillary tube has four, wherein have two to be separately positioned on first and second short tube or to be arranged on axis with first and second short tube on the cylindrical wall of same cross section or the adjacent very valve body of near cross section with this cross section, two other capillary tube is arranged on the cylindrical wall of two ends of valve body part.
5. according to the described direction change valve for refrigerant fluid of claim 3, it is characterized in that, dividing plate with a center hole is set in the left end portion of said valve body, this dividing plate and said first member plate limit a piston chamber, a piston is arranged in this piston chamber, and a piston rod passes the center hole of dividing plate, and its left end is fixedlyed connected with piston, right-hand member is fixedlyed connected with the left end cap of said spool, and this piston rod can slide hermetically at the center hole inner fluid of dividing plate.
6. according to the described direction change valve for refrigerant fluid of claim 5, it is characterized in that, said capillary tube has four, wherein have two to be separately positioned on first and second short tube or to be arranged on axis with first and second short tube on the cylindrical wall of same cross section or the adjacent very valve body of near cross section with this cross section, two other capillary tube is arranged on the cylindrical wall of said valve chamber two end portions.
7. according to claim 5 or 6 described direction change valve for refrigerant fluid, it is characterized in that the axial width δ of each ring sidewall of the radius r of the little circular arc that the interface position of the internal diameter φ of said short tube, they and cylindrical wall forms, the middle circle annular groove of said spool satisfies relation: 0.9 φ＜δ≤φ+2r.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97100270 CN1161420A (en) | 1997-01-20 | 1997-01-20 | Direction change valve for refrigerant fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97100270 CN1161420A (en) | 1997-01-20 | 1997-01-20 | Direction change valve for refrigerant fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1161420A true CN1161420A (en) | 1997-10-08 |
Family
ID=5164927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97100270 Pending CN1161420A (en) | 1997-01-20 | 1997-01-20 | Direction change valve for refrigerant fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1161420A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235522A (en) * | 2010-04-30 | 2011-11-09 | 浙江三花制冷集团有限公司 | Heat exchange equipment and reversing valve thereof |
| CN101963255B (en) * | 2009-07-24 | 2013-01-02 | 浙江三花制冷集团有限公司 | End cover as well as main valve of four-way reversing valve and four-way reversing valve using same |
| US8770225B2 (en) | 2009-07-24 | 2014-07-08 | Zhejiang Sanhua Climate And Appliance Controls Group Co., Ltd | End cover and four-way reversing valve using the same and assembling method thereof |
| CN104048068A (en) * | 2014-06-06 | 2014-09-17 | 徐州顺风阀门有限公司 | Monomer four-way reversing valve |
| CN104879530A (en) * | 2015-04-03 | 2015-09-02 | 上海高迪亚电子系统有限公司 | Plunger type four-way electromagnetic reversing valve |
| CN105241116A (en) * | 2014-07-07 | 2016-01-13 | 重庆美的通用制冷设备有限公司 | Water chilling unit |
| CN106151590A (en) * | 2015-03-27 | 2016-11-23 | 珠海华宇金属有限公司 | A kind of flow channel switching valve pilot valve |
-
1997
- 1997-01-20 CN CN 97100270 patent/CN1161420A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963255B (en) * | 2009-07-24 | 2013-01-02 | 浙江三花制冷集团有限公司 | End cover as well as main valve of four-way reversing valve and four-way reversing valve using same |
| US8770225B2 (en) | 2009-07-24 | 2014-07-08 | Zhejiang Sanhua Climate And Appliance Controls Group Co., Ltd | End cover and four-way reversing valve using the same and assembling method thereof |
| CN102235522A (en) * | 2010-04-30 | 2011-11-09 | 浙江三花制冷集团有限公司 | Heat exchange equipment and reversing valve thereof |
| CN102235522B (en) * | 2010-04-30 | 2014-12-10 | 浙江三花制冷集团有限公司 | Heat exchange equipment and reversing valve thereof |
| CN104048068A (en) * | 2014-06-06 | 2014-09-17 | 徐州顺风阀门有限公司 | Monomer four-way reversing valve |
| CN105241116A (en) * | 2014-07-07 | 2016-01-13 | 重庆美的通用制冷设备有限公司 | Water chilling unit |
| CN105241116B (en) * | 2014-07-07 | 2017-11-10 | 重庆美的通用制冷设备有限公司 | Handpiece Water Chilling Units |
| CN106151590A (en) * | 2015-03-27 | 2016-11-23 | 珠海华宇金属有限公司 | A kind of flow channel switching valve pilot valve |
| CN106151590B (en) * | 2015-03-27 | 2019-01-04 | 珠海华宇金属有限公司 | A kind of flow channel switching valve pilot valve |
| CN104879530A (en) * | 2015-04-03 | 2015-09-02 | 上海高迪亚电子系统有限公司 | Plunger type four-way electromagnetic reversing valve |
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