CN101373114B - Switch valve and reversible circulation freezing plant - Google Patents
Switch valve and reversible circulation freezing plant Download PDFInfo
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- CN101373114B CN101373114B CN2008101686126A CN200810168612A CN101373114B CN 101373114 B CN101373114 B CN 101373114B CN 2008101686126 A CN2008101686126 A CN 2008101686126A CN 200810168612 A CN200810168612 A CN 200810168612A CN 101373114 B CN101373114 B CN 101373114B
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- 230000002441 reversible effect Effects 0.000 title claims abstract description 13
- 230000008014 freezing Effects 0.000 title claims description 11
- 238000007710 freezing Methods 0.000 title claims description 11
- 238000012856 packing Methods 0.000 claims description 90
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 239000003507 refrigerant Substances 0.000 description 17
- 238000007789 sealing Methods 0.000 description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 239000012530 fluid Substances 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 241000486406 Trachea Species 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 230000003292 diminished effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Fluid-Driven Valves (AREA)
Abstract
A conversion valve and a reversible cycle refrigerating device are provided, capable of making a floating valve between conversion piping displace smoothly. An air conditioner as the reversible cycle refrigerating device is provided with a conversion valve (2) comprising a valve body with a plurality of piping and a piston body (7) having a piston itself (17) capable of being displaced freely along the axes of the valve body and received inside the valve body, pads (18) mounted on the two end portions of the valve itself (17) so as to seal the space between itself and the valve itself, a valve body mounted in the central portion of the piston itself (17) so as to convert the flow among the plurality of piping; the pad (18) is formed as a ring, having a square inclined potion (28) with a cross section shape closer to the inner face of the cylinder portion of the valve body to the end portion of said valve body.
Description
Technical field
The present invention relates to a kind of for example to the refrigeration of reversible circulation freezing plant with heat the switching valve of changing and have the reversible circulation freezing plant of this switching valve.
Background technology
At present, the switching valve of changing as two heat exchangers that can have compressor to refrigeration and the air conditioner that heats the reversible circulation freezing plant of changing, use as condenser or evaporimeter, to the flow passage of the cold-producing medium between described compressor and two heat exchangers 100 (as Figure 12 and shown in Figure 13).
Figure 12 and switching valve 100 shown in Figure 13 have valve body 101 cylindraceous, are accommodated in the piston body 102 in the valve body 101.Above Figure 12, a pipe arrangement 103 is installed on valve body 101.Below Figure 12, three pipe arrangements 103 are installed on valve body 101.These three pipe arrangements 103 are set parallel to each other.The two ends of valve body 101 are by fastening body 104 sealings.On valve body 101, be provided with valve seat 105 with the inside and outside connection of valve body 101.
Piston body 102 has piston only 106, a pair of packing ring 107, a valve body 108.Piston only 106 is accommodated in the valve body 101 along the axle center of valve body 101 with can move freely.Packing ring 107 is arranged on the both ends of piston only 106, and valve body 101 interior in the face of separate by packing ring 107 and between the space of packing ring 107 both sides, seal.Valve body 108 is arranged on the central portion of piston only 106, and can change the flow direction between the above-mentioned many pipe arrangements 103 (just flowing).
The switching valve 100 of said structure comprises the pilot valve 111 with electromagnet.By whether applying voltage, change the both ends of valve body 101 and the pressure differential between the packing ring 107, thereby piston body 102 is moved to this magnet spool.Specifically, pressure in end by increasing valve body 101 and a pair of packing ring 107 between packing ring, and the pressure between another packing ring in another end of reduction valve body 101 and a pair of packing ring 107, piston body 102 is moved along the direction near above-mentioned another end, in addition, pressure in another end by increasing valve body 101 and a pair of packing ring 107 between another packing ring, and reduce in end of valve body 101 and a pair of packing ring 107 pressure between the packing ring, piston body 102 is moved along the direction near an above-mentioned end, thereby piston body 102 is moved in valve body 101.Move by piston body 102, the flow direction of the cold-producing medium of 108 pairs of many pipe arrangements 103 of valve body changes, and the refrigeration of 100 pairs of air conditioners of switching valve and heating is changed.
Summary of the invention
Problem to be addressed by invention
The switching valve 100 of above-mentioned existing air conditioner by increasing valve body 101 end and a pair of packing ring 107 in pressure between packing ring 107, and the pressure between another packing ring in another end of reduction valve body 101 and a pair of packing ring 107, piston body 102 is moved along the direction near above-mentioned another end, in addition, pressure in another end by increasing valve body 101 and a pair of packing ring 107 between another packing ring, and reduce in end of valve body 101 and a pair of packing ring 107 pressure between the packing ring, piston body 102 is moved along the direction near an above-mentioned end, thereby piston body 102 is moved in valve body 101.And the rake 109 of the packing ring 107 of piston body 102 tilts along above-mentioned direction.
On the one hand, the space that is surrounded by piston body 102 and a pair of packing ring 107 is discharged side with the high pressure of compressor all the time and is communicated with, and for the discharge side high-pressure refrigerant after preventing to compress flows to the low pressure suction side, packing ring 107 must have sealing.
Therefore, because of the pressure between a pair of packing ring 107 of piston body 102, this packing ring 107 is pushed to dimension at the rake 109 of the packing ring 107 of moving direction front side.
Thereby when piston body 102 moves, owing to opened at the rake 109 of the packing ring 107 of these piston body 102 moving direction front sides, therefore, resistance to sliding increases, hindered moving of this piston body 102, simultaneously, packing ring 107 bears the very big load that is caused by pressure differential.Therefore, existing switching valve 100 is difficult to make piston body 102 to move swimmingly, is difficult to flowing between the pipe arrangement 103 successfully switched.Because of change action under the big load that is caused by pressure differential carries out repeatedly, the sealing that exists packing ring 107 can be impaired, the problem that the life-span descends.
For this reason, the purpose of this invention is to provide a kind of can making the mobile valve body that switches between the pipe arrangement is moved swimmingly, and improve the switching valve and the reversible circulation freezing plant in the life-span of packing ring.
The means of dealing with problems
For the purpose that realizes addressing the above problem, the switching valve of the present invention of claim 1 record comprises tubular valve body and the piston body that a plurality of pipe arrangements have been installed, this piston body have along the axle center of above-mentioned valve body can move freely and be incorporated in piston only in this valve body, be arranged on the both ends of above-mentioned piston only and the packing ring that contacts with valve body, be arranged on above-mentioned piston only central portion in and to the mobile valve body that changes between above-mentioned a plurality of pipe arrangements.Move along the axle center of valve body by above-mentioned piston body, above-mentioned valve body is to mobile change the between above-mentioned a plurality of pipe arrangements, it is characterized in that: above-mentioned packing ring forms ring-type, and has section configuration along with towards the end of above-mentioned valve body and move closer to the rake of the inner face of valve body.
The switching valve of the present invention of claim 2 record is, in the switching valve of claim 1 record, it is characterized in that: the valve seat that inside and outside being provided with this valve body on the both ends of above-mentioned valve body, is communicated with, and on the both ends of above-mentioned piston only, be provided with the 2nd valve body, if near the end of this valve body, then the 2nd valve body just closely contacts and this valve seat is sealed with above-mentioned valve seat.
The switching valve of the present invention of claim 3 record is, in the switching valve of claim 1 or 2 records, it is characterized in that: limiting part is installed on the both ends of above-mentioned piston only, the rake that this limiting part limits above-mentioned packing ring excessively leaves above-mentioned valve body inner face.
The reversible circulation freezing plant of the present invention of claim 4 record is, have compressor, the heat exchanger that links to each other with this compressor, to the switching valve that compressor is connected with heat exchanger, it is characterized in that: above-mentioned switching valve is the described switching valve of one of claim 1～3.
The present invention according to claim 1 record, move closer to the inner face of valve body along with end near above-mentioned valve body owing to the rake of packing ring, therefore, the rake of packing ring that is positioned at piston body moving direction front side is pushed to shrinkage direction when this piston body moves.
The present invention according to claim 2 record, owing to be provided with the 2nd valve body that the valve seat that is arranged on the valve body both ends is sealed on the both ends of piston only, therefore, piston body is positioned on the assigned position that the 2nd valve body seals valve seat reliably.
According to the present invention of claim 3 record,, therefore, can prevent the rake plastic deformation owing to have the limiting part that the restriction rake excessively leaves the valve body inner face.
According to the present invention of claim 4 record, owing to have aforesaid switching valve, therefore, the packing ring rake that is positioned at the piston body moving direction front side of switching valve is pushed to shrinkage direction when this piston body moves.
The invention effect
The present invention of above-mentioned claim 1 record is owing to the rake of the packing ring that is positioned at piston body moving direction front side is pushed along shrinkage direction when this piston body moves, and therefore, this front side packing ring can not hinder moving of piston body.Therefore, just valve body is successfully mobile can to make piston body, can be to the conversion swimmingly of flowing between the pipe arrangement.In addition, in the conventional example of being introduced in the background technology part, packing ring must have sealing, but in the present invention, because the 2nd valve body seals, therefore can alleviate the sealing of packing ring, the life-span of having improved packing ring.
The present invention of claim 2 record is because piston body is positioned on the assigned position that the 2nd valve body seals valve seat reliably, and therefore, valve body can be to the conversion reliably of flowing between the pipe arrangement.
Therefore the present invention of claim 3 record, can prevent rake packing ring damage just owing to can prevent the rake plastic deformation.
Therefore the present invention of claim 4 record, can successfully switch the flowing of cold-producing medium of reversible circulation freezing plant owing to have above-mentioned switching valve.
Description of drawings
Fig. 1 is the key diagram of structure that shows the air conditioner of one embodiment of the invention;
Fig. 2 be show air conditioner shown in Figure 1 switching valve to the mobile switching between the pipe arrangement after the key diagram of state;
Fig. 3 is the cutaway view that the III portion among Fig. 1 is amplified demonstration;
Fig. 4 is the cutaway view of key position of piston body of the switching valve of air conditioner shown in Fig. 1 and 2;
Fig. 5 is the view that schematically shows back state on the magnet spool of pilot valve of air conditioner shown in Figure 1 that voltage is applied to;
Fig. 6 schematically shows the electromagnet coil that stops pilot valve to air conditioner shown in Figure 5 to apply view under the voltage status;
Fig. 7 is the key diagram of piston body mobile status that schematically shows the pilot valve of air conditioner shown in Figure 6;
Fig. 8 is the key diagram that the packing ring of piston body that schematically shows the pilot valve of air conditioner shown in Figure 7 reverts to neutral condition;
Fig. 9 schematically shows the view that voltage is begun to be applied to back state on the magnet spool of pilot valve of air conditioner shown in Figure 7;
Figure 10 is the key diagram of piston body mobile status that schematically shows the pilot valve of air conditioner shown in Figure 9;
Figure 11 (a) is the cutaway view of modified example key position that shows the switching valve of air conditioner shown in Figure 1; Figure 11 (b) amplifies the cutaway view of demonstration to XIB portion among Figure 11 (a);
Figure 12 is the cutaway view that shows the structure of the switching valve that uses in the existing air conditioner;
Figure 13 is the cutaway view of key position of piston body of the switching valve of air conditioner shown in Figure 12.
Symbol description
1 air conditioner, 2 switching valves, 4 compressors, 5 heat exchangers, 6 valve bodies, 7 piston bodies 10,10a,
10b, 10c, 10d pipe arrangement 12a end (valve seat) 17 piston onlies, 18 limiting parts, 19 packing rings
21 valve bodies, 22 balls (the 2nd valve body)
28 rakes, 40 parts (the 2nd valve body)
The specific embodiment
Hereinafter will meet the switching valve of one embodiment of the invention and have this switching valve and describe with reference to 1～10 couple in figure as the air conditioner of reversible circulation freezing plant.
The air conditioner 1 of this embodiment is for for example to use carbon dioxide as the cold-producing medium air conditioner of (being equivalent to fluid).In air conditioner 1, for example be compressed to the approximately pressure of 10Mpa by hereinafter described compressor 4 as the carbon dioxide of cold-producing medium.As illustrated in fig. 1 and 2, air conditioner 1 has switching valve 2, pilot valve 3, compressor 4, two heat exchangers 5 and expansion valves 40.
As illustrated in fig. 1 and 2, switching valve 2 has valve body 6 and piston body 7.Valve body 6 comprises cylindrical portion 8, two end caps 9, a plurality of pipe arrangement 10, valve plate 11.Self-evident, constant cylindric of external diameter in cylindrical portion 8 forms.End cap 9 form discoideus respectively and by welded and installed to the end of cylindrical portion 8, above-mentioned end is sealed.The pump drainage tracheae 12 that connects these end cap 9 central authorities is installed on the end cap 9.This pump drainage tracheae 12 becomes valve seat of the present invention at the end 12a of cylindrical portion 8 inboards.Therefore valve body 6 is provided with valve seat at its both ends respectively.
In illustrated example, be provided with 4 pipe arrangements 10.4 pipe arrangements 10 are installed in respectively on axle center (length) the direction central portion of cylindrical portion 8 of valve body 6, with the inside and outside connection of this cylindrical portion 8.Described pipe arrangement 10 is arranged to outer peripheral face from the cylindrical portion 8 of valve body 6 along the linearly extended state of peripheral direction.3 pipe arrangements 10 (hereinafter representing with symbol 10a, 10b, 10c respectively) in 4 pipe arrangements 10 be arranged to be parallel to each other and along cylindrical portion 8 just the axis direction of valve body 6 (length direction) keep spacing mutually.Remaining 1 pipe arrangement 10 (hereinafter representing) central pipe arrangement 10b clamping in aforementioned 3 pipe arrangement 10a, 10b, 10c in illustrated example with symbol 10d cylindrical portion 8 just valve body 6 axle center ground toward each other.
Piston body 7 is accommodated in the valve body 6, forms than the cylindrical portion 8 of valve body 6 shortly, and simultaneously as illustrated in fig. 1 and 2, piston body 7 has piston only 17, valve body 21 and pair of pistons 50.Piston 50 comprises plectane portion 24, limiting part 18, packing ring 19, as the leaf spring 20 of active force parts, as a pair of ball 22 of the 2nd valve body.Piston only 17 comprises flat part 23, and this flat part 23 forms the parallel band plate-like of cylindrical portion 8 of length direction and valve body 6.Piston 50 is installed in flat part 23 on the two ends of length direction by screw 26.
Limiting part 18 form thicker respectively and with roughly the same discoideus of the diameter of plectane portion 24.Limiting part 18 and the 24 coaxial settings of plectane portion.Limiting part 18 and plectane portion 24 are overlapping and be fixed in the plectane portion 24 by rivet 25.The outer peripheral face of limiting part 18 contacts with the rake hereinafter described 28 of packing ring 19 by leaf spring 20.Limiting part 18 containment rakes 28 excessively leave cylindrical portion 8 inner faces of valve body 6, limit the plastic deformation of this rake 28 and leaf spring 29.
Tilting action power portion 30 forms circular (ring-type just) and is arranged on the whole girth of plectane portion 29 outer rims.Tilting action power portion 30 extends from the inner face of plectane portion 29 outer rims towards the cylindrical portion 8 of the end of valve body 6 and valve body 6.Just tilting action power portion 30 along section configuration along with the direction of cylindrical portion 8 inner faces that move closer to valve body 6 towards the end of valve body 6 with respect to valve body 6 axially and radial skew.
The tilting action power portion 30 of leaf spring 20 can free strain away from the end of plectane portion 29 sides, thus the rake 28 by packing ring 19, and this rake 28 is toward or away from cylindrical portion 8 inner faces of valve body 6.And leaf spring 20 produces elastic restoring forces, makes the inner face of the rake 28 of the packing ring 19 that leaves from cylindrical portion 8 inner faces of valve body 6 towards the cylindrical portion 8 of valve body 6.Under the state in spring 20 is assembled into the cylindrical portion 8 of valve body 6, the rake 28 to packing ring 19 pushes towards the inner face ground of the cylindrical portion 8 of valve body 6 away from the end of plectane portion 29 sides in tilting action power portion 30.
Thereby as shown in Figure 1, in case piston only 17 just piston body 7 is positioned to be arranged in the cylindrical portion 8 of valve body 6 left end of Fig. 1, then valve body 21 just makes pipe arrangement 10a and 10b communicate with each other, and pipe arrangement 10c and 10d are communicated with each other, meanwhile pipe arrangement 10a, 10b and pipe arrangement 10c, 10d are interdicted mutually.As shown in Figure 2, in case piston only 17 just piston body 7 is positioned to be arranged in the cylindrical portion 8 of valve body 6 right-hand end of Fig. 1, then valve body 21 just makes pipe arrangement 10b and 10c communicate with each other, and pipe arrangement 10a, 10d are communicated with each other, meanwhile pipe arrangement 10c, 10b and pipe arrangement 10a, 10d are cut off mutually.By piston only 17 just piston body 7 move along the axle center of the cylindrical portion 8 of valve body 6, the flow direction (just flowing) as the cold-producing medium of fluid between 21 couples of a plurality of pipe arrangement 10a of valve body, 10b, 10c, the 10d changes.
Be provided with two balls 22.Described ball 22 is installed in respectively in the central authorities of limiting part 18, and be arranged to can from this limiting part 18 towards end cap 9 freely projection disappear.As shown in Figure 3, along from end cap 9 projected directions, ball 22 being applied active force,, prevent that ball 22 from coming off from end cap 9 sides by wind spring 31 simultaneously by the crook shown in the Reference numeral among Fig. 3 32.
In case piston body 7 moves along the axis direction of valve body 6, and near being arranged on the relative end cap 9 and as the end 12a of the pump drainage tracheae 12 of valve seat, then ball 22 just closely contacts with end 12a, to end 12a just pump drainage tracheae 12 seal.
Contact by the inner face of packing ring 19 with the cylindrical portion 8 of valve body 6, above-mentioned piston body 7 is divided into the 1st mistress 33, the 34, the 2nd mistress 35 of central compartment successively with left side from Fig. 1 and 2, the space in the valve body 6.And it is shorter than the length of cylindrical portion 8 that the piston only 17 of piston body 7 forms its whole length, and the piston only 17 of piston body 7 is incorporated in the cylindrical portion 8 of valve body 6 in the mode that can move freely along the axle center of the cylindrical portion 8 of valve body 6.
Pilot valve 3 has electromagnet, and with above-mentioned pump drainage tracheae 12 and 12, be installed in the blast pipe 36 on the pipe arrangement 10b, the exhaust tube 37 that is installed on the pipe arrangement 10d links to each other.According to whether voltage being applied on the magnet spool, pilot valve 3 switches between two states, wherein a kind of state is to supply with and supply to a pump drainage tracheae 12 by the cold-producing medium after compressor 4 compressions by being installed in exhaust tube 37 on the pipe arrangement 10d, simultaneously from another pump drainage tracheae 12 by being installed in the state that blast pipe 36 on the pipe arrangement 10b is discharged to cold-producing medium the suction side of compressor 4; Another kind of state is simultaneously from the state of pump drainage tracheae 12 discharging refrigerants from another pump drainage tracheae 12 the supply system cryogens.Just according to whether voltage being applied on the magnet spool, pilot valve 3 will be by being installed in that exhaust tube 37 on the pipe arrangement 10d is supplied with and being supplied among among the above-mentioned mistress 33,35 one by a pump drainage tracheae 12 in two pump drainage tracheaes 12 by the cold-producing medium after compressor 4 compressions, meanwhile by another pump drainage tracheae 12 in two pump drainage tracheaes 12, with cold-producing medium another from mistress 33,35, be discharged to the suction side of compressor 4.
A heat exchanger 5 of the air conditioner 1 of said structure is arranged on the outdoor of building etc., carries out heat exchange with outdoor air, and another heat exchanger 5 is arranged on the indoor of building etc., carries out heat exchange with air in indoor or the refrigerator.
Whether according to voltage being applied on the electromagnet coil of pilot valve 3,1 pair of air conditioner will be supplied to the 1st mistress's 33 state by pump drainage tracheae 12 and switched by the state that pump drainage tracheae 12 supplies to the 2nd mistress 35 by the cold-producing medium after compressor 4 compressions.By valve body 21 is moved along the axle center of valve body 6 with piston body 7, air conditioner 1 reverses the flow direction (just flowing) of two cold-producing mediums between the heat exchanger 5.
Hereinafter will the action of the switching valve 2 of the foregoing description record be described.At first, under the state on the electromagnet coil that voltage is applied to pilot valve 3, pilot valve 3 just will be from the high-pressure refrigerant of the discharge side of compressor 4 by exhaust tube 37, pilot valve 3, pump drainage tracheae 12, supply in the 1st mistress 33, the pressure in the 2nd mistress 35 is discharged to the low pressure suction side of compressor 4 by pump drainage tracheae 12, pilot valve 3, blast pipe 36 simultaneously.So as shown in Figure 5, piston body 7 just valve body 21 be positioned the right-hand end in the drawings of valve body 6, valve body 21 is connected with each other pipe arrangement 10b, 10c, in valve body 6 pipe arrangement 10a, 10d is connected with each other.Just under state shown in Figure 5, the cold-producing medium in the 1st mistress 33 remains under the high pressure conditions, and the cold-producing medium in the 2nd mistress 35 remains under the low-pressure state.
Under state shown in Figure 5, owing to apply voltage in case stop the electromagnet coil of pilot valve 3, then pilot valve 3 just will be from the high-pressure refrigerant of the discharge side of compressor 4 by exhaust tube 37, pilot valve 3, pump drainage tracheae 12, supply in the 2nd mistress 35, pressure in the 1st mistress 33 is discharged to the low pressure suction side of compressor 4 by pump drainage tracheae 12, pilot valve 3, blast pipe 36 simultaneously, therefore, the pressure in the 1st mistress 33 reduces.In case so, because the high-pressure refrigerant that compressor 4 is discharged side supplies in the central compartment 34 all the time, therefore, difference by central compartment's 34 inner refrigerant pressure and the 1st mistress 33 inner refrigerant pressure, cold-producing medium in the central compartment 34 after pressurized is resisting the elastic restoring force of leaf spring 20, and the direction of leaving along the inner face from the cylindrical portion 8 of valve body 6 pushes the rake 28 of left side packing ring 19 figure.
In case so, then as shown in Figure 6, the packing ring 19 in left side is along shrinkage direction strain on the direction left from the inner face of the cylindrical portion 8 of valve body 6 of rake 28 just among the figure, and the sealing between 19 pairs of central compartments 34 of packing ring and the 1st mistress 33 descends.Yet owing to will supply in the 2nd mistress 35 from the cold-producing medium after compressor 4 pressurizations, therefore, move in piston body 7 left side in figure.So as shown in Figure 7, piston body 7 is positioned the left end among the figure in the cylindrical portion 8 of valve body 6,22 couples of end 12a as the pump drainage tracheae 12 of valve seat of ball in left side seal among this figure, valve body 21 is connected with each other pipe arrangement 10a and 10b simultaneously, in valve body 6 pipe arrangement 10c and 10d is connected with each other.Thereby at piston body 7 from valve body 6 right-hand end when left end moves to figure in the drawings, along inner face departure direction (shrinkage direction), the rake 28 that is positioned at towards this left side packing ring 19 of this moving direction front side, left side is pushed from the cylindrical portion 8 of valve body 6.
In case 22 couples of end 12a as the pump drainage tracheae 12 of valve seat of ball in left side seal among the figure, then blocked cold-producing medium flowing by this pump drainage tracheae 12, the pressure of central compartment's 34 inner refrigerants becomes identical with the pressure of the 1st mistress 33 inner refrigerants, elastic restoring force by leaf spring 20, as shown in Figure 8, the rake 28 of the packing ring 19 in left side closely contacts with the inner face of the cylindrical portion 8 of valve body 6 among the figure.So, under state shown in Figure 8, the cold-producing medium in the 1st mistress the 33, the 2nd mistress 35 and the central compartment 34 keeps high pressure.
Under state shown in Figure 8, if voltage is applied on the electromagnet coil of pilot valve 3, then pilot valve 3 just will be from the high-pressure refrigerant of the discharge side of compressor 4 by exhaust tube 37, pilot valve 3, pump drainage tracheae 12, supply in the 1st mistress 33, pressure in the 2nd mistress 35 is discharged to the low pressure suction side of compressor 4 by pump drainage tracheae 12, pilot valve 3, blast pipe 36 simultaneously, therefore, the pressure in the 2nd mistress 35 reduces.In case so, because the high-pressure refrigerant that compressor 4 is discharged side supplies in the central compartment 34 all the time, therefore, difference by central compartment's 34 inner refrigerant pressure and the 2nd mistress 35 inner refrigerant pressure, cold-producing medium in the central compartment 34 after pressurized is resisting the elastic restoring force of leaf spring 20, and the direction of leaving along the inner face from the cylindrical portion 8 of valve body 6 pushes the rake 28 of right side packing ring 19 figure.
In case so, then as shown in Figure 9, the packing ring 19 on right side is along shrinkage direction strain on the direction left from the inner face of the cylindrical portion 8 of valve body 6 of rake 28 just among the figure, and the sealing between 19 pairs of central compartments 34 of packing ring and the 2nd mistress 35 descends.Yet owing to will supply in the 1st mistress 33 from the cold-producing medium after compressor 4 pressurizations, therefore, move on piston body 7 right side in figure.So as shown in figure 10, piston body 7 is positioned the right-hand end among the figure in the cylindrical portion 8 of valve body 6.22 couples of end 12a as the pump drainage tracheae 12 of valve seat of ball on right side seal among the figure, and valve body 21 is connected with each other pipe arrangement 10b and 10c simultaneously, in valve body 6 pipe arrangement 10a and 10d is connected with each other.Thereby at piston body 7 from valve body 6 left end when right-hand end moves to figure in the drawings, along inner face departure direction (shrinkage direction), the rake 28 that is positioned at towards the right side packing ring 19 of this moving direction front side, right side is pushed and strain from the cylindrical portion 8 of valve body 6.
In case 22 couples of end 12a as the pump drainage tracheae 12 of valve seat of ball on right side seal among the figure, then blocked cold-producing medium by flowing in this pump drainage tracheae 12, the pressure of central compartment's 34 inner refrigerants becomes identical with the pressure of the 2nd mistress 35 inner refrigerants, by the elastic restoring force of leaf spring 20, the rake 28 of the packing ring 19 on right side closely contacts with the inner face of the cylindrical portion 8 of valve body 6 among the figure.Thereby the cold-producing medium in the 1st mistress the 33, the 2nd mistress 35 and the central compartment 34 keeps high pressure.
By above-mentioned such operation, switching valve 2 reverses the flow of refrigerant between the heat exchanger 5,5.And above-mentioned switching valve 2 is accommodated in valve plate 11 in the cylindrical portion 8, uses the cored solder of the 1st fusing point, and pipe arrangement 10a, 10b, 10c are welded on cylindrical portion 8 and the valve plate 11.Use the cored solder of low-melting the 2nd fusing point, pipe arrangement 10d is welded on cylindrical portion 8 than the 1st.Then piston body 7 is accommodated in the cylindrical portion 8, end cap 9 is installed on the both ends of cylindrical portion 8, meanwhile, pump drainage tracheae 12, blast pipe 36, exhaust tube 37 are assembled, finish the assembling of switching valve 2 by welding.
According to present embodiment, move closer to cylindrical portion 8 inner faces of valve body 6 along with cylindrical portion 8 ends near valve body 6 owing to the rake 28 of packing ring 19, therefore, the rake 28 of packing ring 19 that is positioned at piston body 7 moving direction front sides is pushed along shrinkage direction when this piston body 7 moves.Therefore, the packing ring 19 of this front side can not hinder moving of piston body 7.Therefore just valve body 21 is mobile swimmingly can to make piston body 7, can be to the conversion successfully of flowing of cold-producing medium between pipe arrangement 10a, 10b, 10c, the 10d.
Owing on the both ends of piston only 17, be provided with ball 22 as the 2nd valve body, and 22 pairs on ball is arranged on valve body 6 both ends and seal as the end 12a of the pump drainage tracheae 12 of valve seat, therefore, piston body 7 can be positioned at the assigned position of ball 22 with the end 12a sealing of pump drainage tracheae 12 reliably.Thereby valve body 21 can be to the conversion reliably of flowing of cold-producing medium between pipe arrangement 10a, 10b, 10c, the 10d.
Owing to have rake 28 is excessively left the limiting part 18 that limits from cylindrical portion 8 inner faces of valve body 6, therefore can prevent rake 28 plastic deformations.Thereby, therefore, can prevent rake 28 packing ring 19 damages just owing to can prevent rake 28 plastic deformations.
In the example of in the background technology part, being introduced in the past, packing ring 107 must have and is used to prevent compress the back and discharges the sealing that the side high-pressure refrigerant flows to suction side low pressure, and packing ring 107 is pushed along dimension by pressure, therefore, because of repeating conversion operations under the very big load that causes in pressure differential, packing ring 107 has been subjected to damage.But in the above-described embodiments, move closer to cylindrical portion 8 inner faces of valve body 6 along with cylindrical portion 8 ends near valve body 6 owing to the rake 28 of packing ring 19, therefore, in case the pressure differential that is applied on the rake 28 of packing ring 19 increases, then the rake 28 of packing ring 19 is just pushed along shrinkage direction, packing ring 19 sealings is descended, thereby pressure differential is diminished, reduce the life-span of having improved packing ring 19 by the caused load of the pressure differential on the rake 28 that is applied to packing ring 19.
In the above-described embodiments, under the state that the rake 28 of packing ring 19 is urged along shrinkage direction,, at this moment, seal by 22 pairs of the mobile of cold-producing medium of ball from packing ring 19 as the 2nd valve body though the sealing of packing ring 19 descends.
Because air conditioner 1 has above-mentioned switching valve 2, therefore, the piston body 7 that can make switching valve 2 just valve body 21 moves swimmingly, can be to the conversion successfully of flowing of the cold-producing medium between pipe arrangement 10a, 10b, 10c, the 10d.
In the above-described embodiments, as cold-producing medium (fluid),, also can use fluoric series coolant though working pressure is effective especially during than the high carbon dioxide of fluoric series coolant.And the present invention also can be applied on the equipment outside the air conditioner 1, also can carry out the conversion that various fluids flow well.In addition in the present invention, as long as it is just passable that many pipe arrangements 10 are set, no matter be several (two pipe arrangements 10 for example only are set).Under the occasion that two pipe arrangements 10 only are set, cold-producing medium mobile between pipe arrangement 10 opened or blocked.Like this, in the present invention, can change the flow direction of fluid such as cold-producing medium, open or block flow also can change described flowing.In addition in the present invention, except ball 22, also can use shown in Figure 11 (a) and Figure 11 (b) such by for example synthetic resin manufacturing and the parts 40 that have an even surface as the 2nd valve body.And in Figure 11 (a) and Figure 11 (b), use identical Reference numeral to represent the parts identical, and omitted introduction with above-mentioned example.In the present invention self-evident, also the 2nd valve body can be constituted various structures.
And the foregoing description only is representative embodiment of the present invention, and the present invention is not limited to the foregoing description.Just in not breaking away from connotation scope of the present invention, can carry out various changes.
Claims (4)
1. switching valve, comprise tubular valve body, piston body that a plurality of pipe arrangements have been installed, on the both ends that this piston body has the piston only that can be accommodated in this valve body with moving freely along the axle center of described valve body, be arranged on described piston only and the packing ring that contacts with valve body, the central portion that is arranged on described piston only and to the mobile valve body that changes between described a plurality of pipe arrangements, move along the axle center of valve body by described piston body, described valve body is characterized in that mobile change the between described a plurality of pipe arrangements:
Described packing ring one possesses plectane portion and rake, and described rake forms ring-type, and its section configuration tilts to the direction along with the inner face that moves closer to valve body towards the end of described valve body.
2. switching valve according to claim 1, it is characterized in that: the valve seat that inside and outside being provided with this valve body on the both ends of described valve body, is communicated with, and on the both ends of described piston only, be provided with the 2nd valve body, if near the end of this valve body, then the 2nd valve body just closely contacts so that this valve seat is sealed with described valve seat.
3. switching valve according to claim 1 and 2 is characterized in that: on the both ends of described piston only limiting part has been installed, the described rake that this limiting part limits described packing ring excessively leaves the inner face of described valve body.
4. the reversible circulation freezing plant of a switching valve that has compressor, the heat exchanger that links to each other with this compressor, compressor is connected with heat exchanger is characterized in that:
Described switching valve is any described switching valve in the claim 1 to 3.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007213445 | 2007-08-20 | ||
| JP2007213445 | 2007-08-20 | ||
| JP2007-213445 | 2007-08-20 |
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| CN101373114A CN101373114A (en) | 2009-02-25 |
| CN101373114B true CN101373114B (en) | 2011-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101686126A Active CN101373114B (en) | 2007-08-20 | 2008-08-19 | Switch valve and reversible circulation freezing plant |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2009068695A (en) |
| CN (1) | CN101373114B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5080612B2 (en) | 2010-05-17 | 2012-11-21 | 株式会社鷺宮製作所 | Flow path switching valve |
| JP2017155887A (en) * | 2016-03-03 | 2017-09-07 | 株式会社鷺宮製作所 | Slide type selector valve and refrigeration cycle system |
| JP6471124B2 (en) * | 2016-07-22 | 2019-02-13 | 株式会社鷺宮製作所 | Sliding switching valve and refrigeration cycle system |
| CN107701399A (en) * | 2017-08-08 | 2018-02-16 | 江苏盈科汽车空调有限公司 | From heat exchange type vehicle-mounted air conditioner compressor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5958277A (en) * | 1982-09-28 | 1984-04-03 | Matsushita Electric Ind Co Ltd | Three-way solenoid valve |
| JPH02102083U (en) * | 1989-01-31 | 1990-08-14 | ||
| JP4116458B2 (en) * | 2003-02-10 | 2008-07-09 | 株式会社不二工機 | Flow path switching valve |
| JP4818668B2 (en) * | 2005-09-15 | 2011-11-16 | 株式会社鷺宮製作所 | Flow path switching valve |
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2008
- 2008-07-30 JP JP2008196701A patent/JP2009068695A/en active Pending
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| JP2009068695A (en) | 2009-04-02 |
| CN101373114A (en) | 2009-02-25 |
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