CN101603605B

CN101603605B - Four-way reversing valve

Info

Publication number: CN101603605B
Application number: CN2008101255549A
Authority: CN
Inventors: J·李; J·杨; X·施
Original assignee: Carrier Corp
Current assignee: Carrier Corp
Priority date: 2008-06-13
Filing date: 2008-06-13
Publication date: 2013-12-25
Anticipated expiration: 2028-06-13
Also published as: CN101603605A; WO2009152402A3; WO2009152402A2

Abstract

The invention relates to a four-way reversing valve comprising a valve body, a valve core, a first passage and a second passage. The valve body comprises a first port, a second port, a third port and a fourth port; the valve core comprises a first opening communicated with the continuous fluid of the first port, a second opening communicated with the continuous fluid of the second port, a third opening communicated with one continuous fluid of the continuous fluids of the third port and the fourth port, and a fourth opening communicated with another continuous fluid of the continuous fluids of the third port and the fourth port; the first passage is limited between the second opening and the third opening and used for enabling one communication of continuous fluid between the second port and the fourth port or between the third port and the forth port; and the second passage is limited between the first opening and the fourth opening and used for enabling one communication of continuous fluid between the first port and the fourth part or between the third port and the forth port.

Description

Four-way change-over valve

Technical field

The present invention relates generally to a kind of four-way change-over valve, this selector valve comprises the rotatable spool that is provided with two fluid passages.

Background technique

Refrigeration system or heat pump loop can comprise for changing by the four-way change-over valve of the flow of refrigerant direction of this refrigeration system.For example, when refrigeration agent flows along a direction, refrigeration system turns round under refrigerating mode.Then, when refrigeration agent flows in opposite direction, refrigeration system turns round under heating mode.

A kind of selector valve of prior art defines two fluid passages.A passage is limited at the valve element internal, and another passage is limited at the valve element-external.When the valve element, during in primary importance, fluid flows through the system associated with this selector valve along first direction.When the valve element, during in the second place, fluid flows through this system along second direction.

The selector valve of another kind of prior art comprises the valve element that is provided with four U-shaped grooves.On primary importance, the U-shaped groove of first set defines the first flow channel, and on the second place, the U-shaped groove of the second cover defines the second flow channel.Gap between every grooving is less than the width of groove.The U-shaped groove of every suit turns over 90 degree with respect to another set of U-shaped groove.The valve element is Linear-moving between primary importance and the second place, thereby direct fluid flows through system.When the valve element is in the first position, the U-shaped groove of first set aligns with four short tubes of valve body, makes this system turn round under refrigerating mode.When the spool Linear-moving arrives the second place, the U-shaped groove of the second cover aligns with four short tubes of valve body, makes this system turn round under heating mode.

The selector valve of another kind of prior art comprises the valve element, and this element comprises two passages of the refrigeration agent directed stream being crossed to refrigeration system.This valve element can rotate between primary importance and the second place.When the valve element is in the first position, the first end of first passage aligns with compressor discharge, and the second end of first passage aligns with the First Heat Exchanger mouth.The first end of second channel continues to align with compressor suction, and the second end of second channel aligns with the second heat exchanger mouth.When the valve element turns to the second place, the second end of first passage aligns with compressor discharge, and the first end of first passage aligns with the second heat exchanger mouth.The second end of second channel aligns with First Heat Exchanger.In rotation process, only there is the compression pump port to keep being communicated with the continuous fluid of passage.Another port temporarily disconnected in rotation process is communicated with the fluid of passage, increases the friction in rotation process.

The selector valve of the refrigeration system of available technology adopting R22 refrigeration agent has the limited capacity that usually is less than 130RT.If the total volume of compressor is greater than this value, along the pressure drop increase of this selector valve.When power system capacity increases, the pipe diameter of selector valve needs to increase, in order to mate with the pipe diameter of this system.If the pipe diameter of selector valve is large not, need to adopt ABAP Adapter.Yet, adopt ABAP Adapter will further increase overall pressure drop.

In order to overcome this problem, this system can two or more selector valves of parallel employing.Yet this has increased the complexity of pipeline, very expensive and increased because selector valve quantity increases the possibility that internal leakage occurs.For example, if a selector valve has the leakage speed of 90l/min under the pressure reduction of 1.0Mpa, if adopt a plurality of selector valves, internal leakage speed will increase 2 or 3 times.What in addition, also exist selector valve to turn round under different time may.If this thing happens, same time selector valve will be on diverse location.For example, the first selector valve can be reduced to pressure reduction zero.If the second selector valve entry into service, due to the reduction of pressure reduction, it will stop on the branch road position.If this thing happens, selector valve need to be repaired or replace.

Summary of the invention

Selector valve comprises the valve body that is provided with the first port, the second port, the 3rd port and the 4th port.Spool comprises the first opening communicated with the first port continuous fluid, the second opening communicated with the second port continuous fluid, the 3rd opening communicated with a continuous fluid in the 3rd port and the 4th port, the 4th opening communicated with another continuous fluid in the 3rd port and the 4th port.First passage is limited between the second opening and the 3rd opening, for the fluid communication between the second port, the 3rd port and the 4th port one is provided, second channel is limited between the first opening and the 4th opening, for the fluid communication between another of the first port, the 3rd port and the 4th port is provided.Described spool can rotate between primary importance and the second place with respect to valve body around rotation axis.When spool is in the first position, the 3rd opening and the 3rd port fluid communication, the 4th opening and the 4th port fluid communication; When spool is in the second place, the 3rd opening and the 4th port fluid communication, the 4th opening and the 3rd port fluid communication.

Another exemplary embodiment comprises refrigeration system, and this system comprises: by refrigerant compression to the first heat exchanger of heat between compressor, exchange system cryogen and a kind of fluid of high pressure, make refrigeration agent expand into the second heat exchanger of heat between expansion gear, exchange system cryogen and the one other fluid of low pressure.Selector valve comprises spool, and described spool comprises the valve body that is provided with First Heat Exchanger mouth, the second heat exchanger mouth, compressor suction and compressor discharge.Described spool comprises the valve element, this element comprise with the first opening of First Heat Exchanger mouth fluid communication, with the second opening of the second heat exchanger mouth fluid communication, with compressor suction and compressor discharge in a fluid communication the 3rd opening, with compressor suction and compressor discharge in the 4th opening of another one fluid communication.Before high-pressure channel is limited at the first opening and the 4th opening, for the fluid communication between First Heat Exchanger mouth, compressor suction and compressor discharge one is provided, low-pressure channel is limited between the second opening and the 3rd opens, for the fluid communication between the another one that the second heat exchanger mouth, compressor suction and compressor discharge are provided.Described spool can rotate around rotation axis between primary importance and the second place.When spool is in the first position, the 3rd opening and compressor suction fluid communication, the 4th opening and compressor discharge fluid communication; When spool is in the second place, the 3rd opening and compressor discharge fluid communication, the 4th opening and compressor suction fluid communication.When spool is in the first position, refrigeration system turns round under refrigerating mode, and when spool is in the second place, refrigeration system turns round under heating mode.

These features and the further feature that by following description and accompanying drawing, will can better understand the present invention.

The accompanying drawing explanation

By following, to general detailed description of preferred embodiment, various feature and advantage of the present invention will become apparent to those skilled in the art.As follows to briefly introducing of Figure of description:

Fig. 1 has shown the refrigeration system that adopts four-way change-over valve;

Fig. 2 has shown the four-way change-over valve in primary importance;

Fig. 3 has shown the four-way change-over valve in the second place;

Fig. 4 has shown the perspective view in the four-way change-over valve of primary importance;

Fig. 5 has shown the perspective view of the four-way change-over valve mediated;

Fig. 6 has shown the perspective view in the four-way change-over valve of the second place;

Fig. 7 has shown the perspective view of the fluid passage element of spool;

Fig. 8 has shown along the sectional elevation of the spool fluid passage element of Fig. 7 center line 8-8;

Fig. 9 has shown along the sectional view of the spool fluid passage element of Fig. 7 center line 9-9;

Figure 10 has shown the front perspective view of spool driving mechanism;

Figure 11 has shown the rear view of spool driving mechanism;

Figure 12 has shown the perspective view of single spool; With

Figure 13 has shown along the sectional view of the single spool of Figure 12 center line 13-13;

Figure 14 has shown the startup system of the four-way change-over valve be in the first position; With

Figure 15 has shown the startup system of the four-way change-over valve that is in the second place.

Embodiment

Fig. 1 has shown heat pump loop or refrigeration system 20, comprises compressor 22, First Heat Exchanger 24, expansion gear 26, the second heat exchanger 28.Refrigeration agent is through closed-loop refrigeration systems 20 circulations.

When refrigeration system 20 turns round under refrigerating mode, refrigeration agent passes overcompression machine discharge pipe line 38 and leaves compressor 22 with high pressure Gao Han, and flows through the First Heat Exchanger 24 as condenser.At these First Heat Exchanger 24 places, refrigeration agent transfers heat to fluid (for example air) and is condensed into liquid, and this liquid leaves First Heat Exchanger 24 to hang down the enthalpy high pressure.Fan 30 passes through First Heat Exchanger 24 by the air guiding.Through overcooled refrigeration agent, then by expansion gear 26, make refrigeration agent be expanded to low pressure.After overexpansion, refrigeration agent flows through the second heat exchanger 28 as vaporizer.At these the second heat exchanger 28 places, refrigeration agent is accepted for example, heat from one other fluid (air), with high enthalpy low pressure, leaves the second heat exchanger 28.Fan 32 passes through the second heat exchanger 28 by the air guiding, thus cooled region 120.Refrigeration agent then flows through compressor suction pipeline 36 and turns back to compressor 22, completes this circulation.

Four-way change-over valve 34 (describing hereinafter) can change the direction of refrigeration agent stream, thereby realizes that refrigeration system 20 turns round under heating mode.Refrigeration agent from compressor is guided to the second heat exchanger 28 as condenser, from the heat of refrigeration agent, is passed in air for heating region 20.Refrigeration agent from the second heat exchanger 28 expands in expansion gear 26.Then refrigeration agent flows through as the First Heat Exchanger 24 of vaporizer and also accepts the heat from air.Refrigeration agent then flows in compressor suction pipeline 36 and enters compressor 22, completes this circulation.

Fig. 2 schematically illustrates the part of the four-way change-over valve 34 in primary importance.The 3rd member 134 will be offered from the fluid of second component 132, the first member 130 will be offered from the fluid of the 4th member 136.

Fig. 3 schematically illustrates the part of the four-way change-over valve 34 in the second place.Second component 132 will be offered from the fluid of the 4th member 136, the 3rd member 134 will be offered from the fluid of the first member 130.

Fig. 4-6 shown four-way change-over valve 34 from primary importance (shown in Fig. 4) to neutral position (shown in Fig. 5) to the motion of the second place (shown in Fig. 6).This four-way change-over valve 34 comprises valve body 40 and is contained in the hollow valve core 42 (valve element) in valve body 40.Spool 42 rotates around rotational axis x.Spool 42 comprises fluid passage element 80 (shown in Fig. 7-9) and driving element 82 (shown in Figure 10 and 11).

Valve body 40 comprise with the port 46 of the first member 130 fluid communication, with the port 50 of second component 132 fluid communication, with the port 48 of the 3rd member 134 fluid communication and with the port 44 of the 4th member 136 fluid communication.The pipe diameter of the pipe diameter of four-way change-over valve 34 and

port

44,46,48,50 is almost equal.

Valve body 40 also comprises the first pipeline 52 and second pipe 54.

Pipeline

52 and 54 has this length perpendicular to rotational axis x of a segment base.Each

pipeline

52 and 54 comprises respectively

end face

56 and 58 and comprise respectively opposing end surface 60 and 62.In an example,

pipeline

52 and 54 is substantially parallel.

Fig. 7-9 have shown the fluid passage element 80 of spool 42.Spool 42 comprises first passage 66 and second channel 68.First passage 66 comprise with the opening 72 of second component 132 fluid communication, with the opening 70 of the 3rd member 134 or the 4th member 136 fluid communication.First passage 66 provides the fluid communication between opening 70 and 72.Second channel 68 comprise with the opening 74 of the first member 130 fluid communication, with the opening 76 of the 3rd member 134 or the 4th member 136 fluid communication.Second channel 68 provides the fluid communication between opening 74 and 76.Opening 74 continuous with the first member 130 fluid communication, opening 72 continuous with second component 132 fluid communication.In an example, rotational axis x is through opening 72 and 74.In an example, the first axle be limited between opening 72 and 74 is basically perpendicular to the second axis be limited between opening 70 and 76.

Fig. 2 and 4 has shown the spool 42 in primary importance.Opening 72 aligns with the port 50 of second component 132, and opening 70 aligns with the port 48 of the 3rd member 134.Fluid from second component 132 is guided to the 3rd member 134.Opening 74 aligns with the port 46 of the first member 130, and opening 76 aligns with the port 44 of the 4th member 136.Fluid from the 4th member 136 is guided to the first member 130.

Fig. 3 and 6 has shown the spool 42 in the second place.Opening 76 aligns with the port 48 of the 3rd member 134, and opening 74 aligns with the port 46 of the first member 130.Fluid from the first member 130 is guided to the 3rd member 134.Opening 70 aligns with the port 44 of the 4th member 136, and opening 72 aligns with the port 50 of second component 132.Fluid from the 4th member 136 is guided to second component 132.

Figure 10 and 11 has shown the perspective view of the driving element 82 of spool 42.Driving element 82 comprises the projection 86 engaged with the recess 84 of fluid passage element 80.In an example, be provided with two projections 86, each aligns and engages with one of them of two recesses 84.Projection 86 is contained in recess 84, makes

element

80 and 82 alignment, thus the rotation of the rotation propelling fluid pass element 80 of driving element 82.In another example, driving element 82 comprises recess 84, and fluid passage element 80 comprises projection 86.Yet element 80 can be connected in any way with 82.In another example shown in Figure 12 and 13, spool 42 (element 80 and 82) forms single integrated member, just no longer needs connection features.

Driving element 82 also comprises neck 88, and neck 88 comprises around neck 88 along a plurality of teeth 90 that circumferentially extend.In an example, in a plurality of teeth 90, each radially extends from rotational axis x.Driving element 82 also comprises the passage 122 with port 50 and opening 72 fluid communication.That is, passage 122 is limited between opening 72 and port 50.

Get back to Fig. 4-6,

tooth bar

92 and 94 is contained in respectively in each

pipeline

52 and 54 of four-way change-over valve 34.Each

tooth bar

92 and 94 comprises respectively a plurality of teeth 96 and 98.Described tooth bar 92 and a plurality of teeth 96 of 94 and 98 and a plurality of teeth 90 engagements of spool 42.Along with the Linear-moving (as mentioned below) of

tooth bar

92 and 94, tooth bar 92 and a plurality of

teeth

96 and 98 of 94 respectively with a plurality of teeth 90 engagements of spool 42 driving elements 82, thereby rotational valve core 42.Piston 100 and 102 is arranged on each end of tooth bar 92, thus supporting tooth bar 92,

piston

104 and 106 is arranged on each end of tooth bar 94, thus supporting tooth bar 94.Although show and described two

pipelines

52 and 54 and two

tooth bars

92 and 94, also can only adopt a

tooth bar

92 or 94 come rotational valve cores 42.

Fig. 4 and 14 has shown the four-way change-over valve 34 in primary importance.When spool 42 will be moved to the second place, spool 42 rotates 180 ° along first direction A.When spool 42 rotates about 90 ° of positions that arrive shown in Fig. 5, bypass port 78 temporarily align with port 44 and 48 (description hereinafter).Once complete the rotation of 180 °, four-way change-over valve 34 is on the second place, as shown in Fig. 3,6 and 15.

When spool 42 will be moved to primary importance, spool 42 rotates 180 ° along second direction B.When spool 42 rotates about 90 ° of positions that arrive shown in Fig. 5, bypass port 78 is alignd with port 44 and 48.Once complete the rotation of 180 °, four-way change-over valve 34 is in the first position, as shown in Fig. 2,4 and 14.

In an example shown in Fig. 5, bypass port 78 is formed on the surface of spool 42 with the X-shaped shape substantially.As Figure 7-9, bypass port 78 is included in the main passage 140 of the whole width D that extends through spool 42 between passage 66 and 68.That is, extend between two surfaces of spool 42 main passage 140.Bypass port 78 also comprises crosses the second channel 142 that extend main passage 140.As shown in Figure 9, second channel 142 only has height H the local width D that extends through spool 42.Be provided with second channel 142 on each in two surfaces of spool 42, second channel crosses the main passage 140 that extends through width D.As mentioned below, when spool 42 mediates, when exhaust fluid is had nowhere to go, the second channel 142 that width reduces contributes to fluid is directed into to main passage 140.

In an example, four-way change-over valve 34 can be used in the refrigeration system 20 shown in Fig. 1, thus the operation of conversion refrigeration system 20 between refrigeration mode (when spool 42 during in primary importance) and heating mode (when spool 42 during in the second place).In this example, First Heat Exchanger 24 is that the first member 130, the second heat exchangers 28 are second components 132, and compressor suction pipeline 36 is the 3rd members 134, and compressor discharge pipeline 38 is the 4th members 136.

In an example, the port 48 communicated with compressor suction pipeline 36 is arranged on the port 44 communicated with compressor discharge pipeline 38, and the pressure reduction between compressor discharge pipeline 38 and compressor suction pipeline 36 can be offset any gravitational effects on spool 42.When fluid passage element 80 mediates, bypass port 78 is alignd with

port

44 and 48, makes the interior high-pressure refrigerant bypass of port 44 to port 48, prevents high-pressure discharge.

As shown in FIG. 14 and 15, pilot valve 108 is controlled

tooth bar

92 and 94 motion and the rotation of controlling thus spool 42.Pilot valve 108 is controlled from compressor discharge pipeline 38 to

pipeline

52 and 54 pressure flow direction, thus mobile rack 92 and 94.Pilot valve 108 is the small-sized four-way change-over valves that are provided with four pipeline D, C, S and E.Pipeline D is connected to compressor discharge pipeline 38 by capillary tube, and pipeline S is connected to compressor suction pipeline 36 by capillary tube.

In refrigerating mode, pilot valve 108 provides the fluid between pipeline D and pipeline C to be communicated with, and provides the fluid between pipeline E and pipeline S to be communicated with.Therefore, pipeline C is communicated with high-pressure discharge pipeline 38 fluids, and pipeline E is communicated with low-pressure suction pipeline 36 fluids.Along the pipeline 114 guiding high pressure near

end face

58 and 60, along the pipeline 112 guiding low pressure near end face 56 and 62.Pressure reduction moves to position shown in Figure 14 by

tooth bar

92 and 94.

In the heating mode process, pilot valve 108 provides the fluid between pipeline D and pipeline E to be communicated with, and provides the fluid between pipeline C and pipeline S to be communicated with.Therefore, pipeline E is communicated with high-pressure discharge pipeline 38 fluids, and pipeline C is communicated with low-pressure suction pipeline 36 fluids.Along the pipeline 112 guiding high pressure near

end face

56 and 62, along the pipeline 114 guiding low pressure near end face 58 and 60.Pressure reduction moves to position shown in Figure 15 by

tooth bar

92 and 94.

Select operating mode in controller 110 (cooling or heating).Based on this operator scheme, pilot valve 108 will direct into respectively from the pressure of refrigeration system 20

end face

56,58,60 and 62 of

tooth bar

92 and 94, thereby the member of mobile four-way change-over valve 34, in order to change the operation of refrigeration system 20 (shown in position shown in Figure 14 and Figure 15 between position) between refrigerating mode and heating mode.Differential pressure action on each piston 100,102,104 and 106 with Linear-moving

tooth bar

92 and 94, thereby along anticipated orientation rotational valve core 42.

Fig. 2,4 and 14 has shown the four-way change-over valve 34 when refrigeration system 20 operates under refrigerating mode.Opening 76 aligns with port 44, in order to refrigeration agent is directed to First Heat Exchanger 24 (as the cold air device) from compressor discharge pipeline 38, opening 70 aligns with port 48, in order to refrigeration agent the second heat exchanger 28 (as vaporizer) is directed to compressor suction pipeline 36.

If refrigeration system 20 will operate under heating mode, controller 110 sends and will be directed to the signal of

piston

100 and 106 through pipeline 112 from the high pressure of compressor discharge pipe line 38 to pilot valve 108.With respect to Figure 14, impel tooth bar 92 to move to right side, tooth bar 94 moves to left side.Along with the movement of

tooth bar

92 and 94, tooth bar 92 and a plurality of

teeth

96 and 98 of 94 respectively with a plurality of teeth 90 engagements of spool 42 driving elements 82, along direction A rotating drive element 82, rotate thus the fluid passage element 80 of setting up.Once spool 42 rotates 90 °, bypass port 78 is alignd (as shown in Figure 5) with

port

44 and 48, makes high-pressure refrigerant roundabout between

port

44 and 48.

Tooth bar

92 and 94 continues mobile, until

piston

102 and 104 contacts respectively the

end face

60 and 58 of

pipeline

52 and 54, provides stop.Spool 42 rotates 180 ° and arrives the position shown in Fig. 3,6 and 15.On this position, refrigeration system 20 operates under heating mode.Opening 76 aligns with port 48, makes the refrigeration agent from First Heat Exchanger 24 (as vaporizer) be provided to compressor suction pipeline 36.Opening 70 aligns with port 44, makes the refrigeration agent from compressor discharge pipeline 38 be provided to the second heat exchanger 28 (as condenser).

If refrigeration system 20 operates under refrigerating mode, controller 110 sends and will be directed to the signal of

piston

102 and 104 through pipeline 114 from the high pressure of compressor discharge pipe line 38 to pilot valve 108.With respect to Figure 15, impel tooth bar 92 to move to left side, tooth bar 94 moves to right side.Along with the movement of

tooth bar

92 and 94, tooth bar 92 and a plurality of

teeth

96 and 98 of 94 respectively with a plurality of teeth 90 engagements of spool 42 driving elements 82, along direction B rotating drive element 82, rotate thus the fluid passage element 80 of setting up.Once spool 42 rotates 90 °, bypass port 78 is alignd (as shown in Figure 5) with

port

44 and 48, makes high-pressure refrigerant roundabout between

port

44 and 48.

Tooth bar

92 and 94 continues to rotate, until

piston

100 and 106 contacts respectively the

end face

56 and 62 of

pipeline

52 and 54, provides stop.Spool 42 rotates 180 ° and arrives the position shown in Fig. 2,4 and 14.On this position, refrigeration system 20 operates under refrigerating mode.Opening 70 aligns with port 48, makes the refrigeration agent from the second heat exchanger 28 (as vaporizer) be provided to compressor suction pipeline 36.Opening 76 aligns with port 44, makes the refrigeration agent from compressor discharge pipeline 38 be provided to First Heat Exchanger 24 (as condenser).

Although four-way change-over valve 34 has been disclosed and has been shown as for refrigeration system 20, should be understood that this four-way change-over valve 34 can be for the system of any type.

This four-way change-over valve 34 provides lot of advantages with respect to selector valve of the prior art.One, when only adopting a valve, pipeline is uncomplicated, reduces internal leakage.This four-way change-over valve 34 also provides the simply roundabout of pressurized gas.In addition, because the pipeline of four-way change-over valve 34 has the diameter identical with the pipeline of refrigeration system 20 basically, therefore no longer need ABAP Adapter, reduced unnecessary pressure drop.Also increased the volume of four-way change-over valve 34.

Although adopted direction " left side ", " right side ", " counterclockwise " etc. in foregoing description, these terms are only for the disclosed embodiments, for moving direction, right and wrong are determinate.

Foregoing description is only the example of the principle of the invention.Under above-mentioned enlightenment, multiple modification of the present invention and distortion are possible.The preferred embodiments of the present invention are open, but someone skilled in the art will appreciate that certain variations falls within the scope of the present invention.Therefore, should be understood that within the scope of the appended claims, the present invention can implement to be different from mode described in detail.For the foregoing reasons, following claim should be for determining the actual scope and content of the present invention.

Claims

1. a selector valve comprises:

Valve body, be provided with the first port, the second port, the 3rd port and the 4th port; With

Spool, comprise the first opening communicated with the first port continuous fluid, the second opening communicated with the second port continuous fluid, the 3rd opening with a fluid communication in the 3rd port and the 4th port, the 4th opening with another fluid communication in the 3rd port and the 4th port, wherein first passage is limited between the second opening and the 3rd opening, for the fluid communication between the 3rd port and the 4th port and the second port is provided, second channel is limited between the first opening and the 4th opening, for the fluid communication between another and the first port that the 3rd port and the 4th port are provided, with

Wherein said spool can rotate between primary importance and the second place with respect to valve body around rotation axis, when spool is in the first position, the 3rd opening and the 3rd port fluid communication, the 4th opening and the 4th port fluid communication, when spool is in the second place, the 3rd opening and the 4th port fluid communication, the 4th opening and the 3rd port fluid communication

Wherein said spool comprises bypass port and be provided with neutral position between primary importance and the second place, and when spool mediates, fluid flows through bypass port between the 3rd port and the 4th port.

2. selector valve according to claim 1, it is characterized in that: described spool rotates about 180 ° between primary importance and the second place.

3. selector valve according to claim 1 is characterized in that: this neutral position be in the first position and the second place between the place of about 90 °.

4. selector valve according to claim 1 is characterized in that: described bypass port comprises the third channel extended through valve core diameter and crosses the four-way that extend through valve core diameter the part of third channel.

5. selector valve according to claim 1 also comprises: be connected on spool the driving element for rotational valve core.

6. selector valve according to claim 5, is characterized in that: the whole formation of this driving element and spool.

7. selector valve according to claim 5 is characterized in that: this driving element defines one of them at least a portion of first passage and second channel.

8. selector valve according to claim 5 also comprises: be connected on driving element for rotating drive element the driving mechanism of rotational valve core thus.

9. selector valve according to claim 8, it is characterized in that: described driving mechanism comprises can be basically perpendicular at least one tooth bar that valve core length moves, this at least one tooth bar can engage with driving element, for rotating drive element between primary importance and the second place rotational valve core thus.

10. selector valve according to claim 9, it is characterized in that: this at least one tooth bar turns to the second place by spool from primary importance along moving of first direction, and this at least one tooth bar turns to primary importance by spool from the second place along moving of contrary second direction.

11. selector valve according to claim 9 is characterized in that: described driving mechanism also comprises the piston be connected on this at least one tooth bar, mobile this at least one the tooth bar for response is applied to pressure on piston.

12. selector valve according to claim 11 is characterized in that: described pressure is provided by the compressor discharge pipeline..

13. selector valve according to claim 9, it is characterized in that: described driving mechanism comprises the first tooth bar and the second tooth bar, wherein the first tooth bar is configured to spool is moved to the second place from primary importance, and the second tooth bar is configured to spool is moved to primary importance from the second place.

14. selector valve according to claim 1 is characterized in that: first end opening's edge first axle aligns with the second port, and the 3rd port aligns with the 4th port along the second axis, basic vertical and the second axis of described first axle.

15. a refrigeration system comprises:

Compressor, for arriving high pressure by refrigerant compression;

The first heat exchanger, for the heat between exchange system cryogen and a fluid;

Expansion gear, for expanding into low pressure by refrigeration agent;

The second heat exchanger, for heat between exchange system cryogen and another fluid;

Selector valve, comprise and be provided with the First Heat Exchanger mouth, the second heat exchanger mouth, the valve body of compressor suction and compressor discharge, this selector valve comprises spool, described spool comprises the valve element, this element comprises the first opening with First Heat Exchanger mouth fluid communication, the second opening with the second heat exchanger mouth fluid communication, the 3rd opening with a fluid communication in compressor suction and compressor discharge, the 4th opening with another one fluid communication in compressor suction and compressor discharge, one of them high-pressure channel is limited between the first opening and the 4th opening, for the fluid communication between compressor suction and compressor discharge and First Heat Exchanger mouth is provided, a low-pressure channel is limited between the second opening and the 3rd opening, for the another one of compressor suction and compressor discharge and the fluid communication between the second heat exchanger mouth are provided,

Wherein said spool can rotate around rotation axis between primary importance and the second place, when spool is in the first position, and the 3rd opening and compressor suction fluid communication, the 4th opening and compressor discharge fluid communication; When spool is in the second place, the 3rd opening and compressor discharge fluid communication, the 4th opening and compressor suction fluid communication, and

Wherein when spool is in the first position, refrigeration system turns round under refrigerating mode, and when spool is in the second place, refrigeration system turns round under heating mode.