CN106594319A

CN106594319A - Four-way valve with improved pilot valve

Info

Publication number: CN106594319A
Application number: CN201510685780.2A
Authority: CN
Inventors: 曾阳
Original assignee: Bosch Thermotechnology Shandong Co Ltd
Current assignee: Bosch Thermotechnology Shanghai Co Ltd
Priority date: 2015-10-20
Filing date: 2015-10-20
Publication date: 2017-04-26
Anticipated expiration: 2035-10-20
Also published as: CN106594319B

Abstract

An improved pilot valve for a four-way valve comprises a valve body, a first channel, a second channel, a third channel, a fourth channel, an iron core, an electromagnetic coil and a valve block, wherein the valve body is provided with a second valve body connected with one end of a first valve body; the first channel, the second channel, the third channel and the fourth channel are arranged in the first valve body; the iron core is arranged in the second valve body and moves along the second valve body; the electromagnetic coil can generate electromagnetic force for moving the iron core when powered on; the valve block moves between a first position and a second position in the first valve body through movement of the iron core; in the first position, the fluid in the first channel communicates with fluid in the fourth channel, and fluid in the second channel communicates with fluid in the third channel; in the second position, fluid in the first channel communicates with fluid in the second channel, and fluid in the third channel communicates with fluid in the fourth channel; the valve block can move between the first position and the second position through movement of the iron core when the electromagnetic coil is powered on and is locked in the first position or the second position when the electromagnetic coil is powered off. The pilot valve electrifies the electromagnetic coil only during switching of operating modes, and accordingly electric energy is saved.

Description

Cross valve with improved pilot valve

Technical field

The present invention relates to a kind of cross valve, more particularly to it is a kind of for refrigerating circuit in pilot valve Cross valve, the pilot valve can switch between two kinds of mode of operations and can be locked in two kinds of mode of operations.

Background technology

Cross valve would generally be included in the refrigerating circuit of air conditioning system, refrigerator etc., Fig. 9 schematically shows Go out the block diagram of the refrigerating circuit for applying the cross valve with pilot valve, the refrigerating circuit is mainly by compressor 100th, the composition such as condenser 200, vaporizer 300, expansion valve 400, refrigerating circuit is often according to need To operate in different modes, such as heating mode and refrigeration/defrosting mode, both patterns are cut Change and can be completed by a cross valve.

Cross valve generally includes main valve 500 and pilot valve 600, and the valve body of the main valve 500 is logical with four Road D, C, S, E, passage D are connected to the outlet side of compressor 100, i.e. high-pressure side, passage S The entrance side of compressor 100 is connected to, channel C and E are connected respectively to condenser 200 and vaporizer 300.By the switching of main valve 500, the connected relation between four passages D, C, S, E can occur Change, makes fluid follow different flow paths, so that refrigerating circuit is realized between different mode mutually Change.

The switching of the connected relation between four passages is by the both sides to the left and right of the piston in main valve 500 Movement completing, and piston moves left and right by pilot valve 600 to complete.

As shown in figure 9, there are the valve body of pilot valve 600 four capillarys being connected with valve body of main valve respectively to lead to Road 21,22,23,24, specifically, capillary channel 21 is connected with the passage D of main valve, capillary Passage 23 is connected with the passage S of main valve, and the side of the piston of capillary channel 22 and main valve is (in Fig. 9 Left side) connect, capillary channel 24 is communicated with the opposite side (right side in Fig. 9) of the piston of main valve.Position It is used to cover two in capillary channel 22,23,24 in the valve block in pilot valve valve body, so that leading Under two kinds of mode of operations of valve 600, the valve body of main valve 500 is promoted respectively to the left or to the right, makes master Valve is in different mode of operations, specifically, when the valve block 8 of pilot valve covers capillary channel 22,23 When, capillary channel 21 and 24 is communicated so that high-pressure gas flow enters the right side of main valve 500, promotes master The piston of valve is moved to the left.When the valve block 8 of pilot valve 600 covers capillary channel 23,24, capillary is led to Road 21 and 22 is communicated so that high-pressure gas flow enters the left side of main valve 500, promote the piston of main valve to Move right.

Fig. 1 shows a kind of pilot valve structure of prior art, and which includes valve body 1, in valve body 1 Iron core 5, the valve block 8 for being connected on front side of iron core (left side in Fig. 1), and it is located at (figure on rear side of iron core 5 In 1 right side) spring 6.As spring 6 is located at the rear side of iron core 5, in the feelings of solenoid power-off Under condition, iron core 5 is biased all the time to the left, makes pilot valve in a kind of mode of operation, if will be switched to Another mode of operation, needs to be powered solenoid, pushes away to the right valve block with resisting spring force, If keeping this mode of operation, solenoid must just remained powered on, once supply electrically disconnected, Valve block 8 will be transformed into previous position under spring force.This aspect wastes electric energy, On the other hand, also increase 5 accident power-off of iron core caused by pilot valve so as to whole cross valve can not Control operation, causes the operational failure of refrigerating circuit.

Accordingly, it is desirable to provide one kind quickly and stably can be switched over, while can also saves energy Workable cross valve.

The content of the invention

It is an object of the invention to overcome defect present in existing cross valve, in existing cross valve Pilot valve is improved, there is provided it is a kind of can fast and stable ground switching valve mode of operation, and electricity can be saved The pilot valve for cross valve in source and the cross valve with the pilot valve.

Above-mentioned purpose is the pilot valve realizing by providing a kind of improved pilot valve for cross valve Including：Valve body, the valve body have the first valve body and the second valve body being connected with one end of the first valve body； First, second, third, fourth passage being located in the wall of the first valve body；Be located in the second valve body with Along the iron core of the second valve body movement；For the solenoid of iron core, the energy when solenoid is energized Generation makes iron core along the electromagnetic force of the axial movement of valve body；Shifting in the first valve body and by iron core The dynamic and valve block that moves between the first position and the second position, in first position, first passage and Fourth lane is in fluid communication, and second channel and third channel are in fluid communication, in the second position, institute State first passage and second channel is in fluid communication, and third channel and the 3rd four-way are in fluid communication；Institute State valve block can when solenoid is powered by the movement of iron core between the first position and the second position It is mobile, and the first position and the second position are locked in solenoid power-off.

Alternatively, the pilot valve included for the rotor engaged with iron core in the second valve body, described Rotor is detachably connected with the valve block, and the rotor is by towards iron core fexible bias pressure, described turn Son carries out form fit with the inwall and iron core of the second valve body, so that the movement of the iron core causes Rotor is rotated between the first position and the second position and can be locked in first position and second Put, so that valve block is locked in first position and the second position.

Alternatively, the end face for facing iron core of the rotor is provided with outline, the iron core towards turning The end face of son is provided with the outline for matching therewith, while the inwall of the second valve body has reinforcement, institute State the reinforcement Internal periphery being engaged with the outline with rotor end-face and axially extend it is recessed Groove, the rotor and the iron core are provided with axially extending rib, the ferrum respectively on its outer circumference surface , always situated in the groove of the second valve body and along groove slip, the rib of the rotor is at first for the rib of core When putting against the second valve body Internal periphery, slip into groove in the second position.

Alternatively, spring is provided between first valve body and the rotor, will turn for providing Biasing force of the son to iron core bias.

Alternatively, the valve block is connected with piston rod, and the piston rod is stretched through the end wall of the first valve body Enter in the second valve body, and be connected with the rotor, the spring is set on the piston rod.

Alternatively, the side towards the first valve body of the rotor has circular shrinkage hole, and a distance piece sets Put in the shrinkage pool, the spring one end abuts against the end wall of the first valve body, the other end abuts against institute State distance piece.

Alternatively, depth of the thickness of the distance piece less than the shrinkage pool, to limit the spring Movement radially.

Alternatively, the pilot valve is used to sense iron core in also including being located at the blind end of second valve body The position sensor of position, and be located on the position sensor to keep the bullet of the plunger position Property part.

Alternatively, the reinforcement of the inwall of second valve body has three or more grooves, institute State rotor and institute's iron core has three or more ribs.

The present invention also provides a kind of including main valve and the cross valve of above-mentioned pilot valve, and the main valve includes：Even The on high-tension side first passage of compressor that is connected in refrigerating circuit, it is respectively connecting to vaporizer and condenser Second and fourth lane and be connected to the fourth lane of compressor low-pressure side；And for selecting The piston for making to property first passage be connected with second and fourth lane respectively, the first passage of the pilot valve Communicate with the first passage of main valve, the third channel of pilot valve is connected with the third channel of main valve, pilot valve Second channel is connected with the side of the piston of main valve, and the fourth lane of pilot valve is another with the piston of main valve Side communicates, and causes connected relation between each passage of main valve so as to the switching of the mode of operation of pilot valve Change.

Internal structure of the present invention by the pilot valve in change cross valve, by the spring of prior art pilot valve Be changed to arrange the left side of iron core, while increase removable and rotatable rotor, and by iron core, Form fit between rotor and pilot valve valve interior wall so that iron core because of electromagnetic force in axial direction In mobile process, cause the locking of rotor.Then this structure is caused in solenoid brief energization In the case of power-off, valve block can be locked in two positions.That is, solenoid is only in pilot valve Need to be powered during switching, in the course of work of refrigerating circuit, solenoid power-off, which saves energy Amount, increased the life-span of solenoid.

Description of the drawings

The each side of the application, including its specific features and advantage, all will easily from detailed below Description and accompanying drawing are understood：

Fig. 1 illustrates the structure of the pilot valve in the prior art cross valve in solenoid power-off；

Fig. 2 illustrates the structure of the pilot valve shown in Fig. 1 when solenoid is powered；

Fig. 3 is the decomposition diagram of the pilot valve of cross valve of the invention；

Fig. 4 is the decomposition diagram of the of the invention pilot valve similar with Fig. 3, wherein the second valve body By partial sectional, to illustrate its in-profile；

Fig. 5 illustrates structure of the pilot valve of the present invention under first mode；

Fig. 6 illustrates structure of the pilot valve of the present invention under second mode；

Fig. 7 illustrates the location drawing of pilot valve rotor, iron core and the second valve body in the flrst mode；And

Fig. 8 illustrates the location drawing of pilot valve rotor, iron core and the second valve body under the second mode；

Fig. 9 shows a schematic refrigerating circuit, which uses the cross valve with pilot valve.

Specific embodiment

The application is more completely described with reference to the accompanying drawings, shown in the drawings of exemplary embodiment. However, the application should not be considered as being limited to the embodiment listed by this paper.Such as the application art Those of ordinary skill it is easy to understand as, the feature of disclosed exemplary embodiment can be combined. The reference number being similar in the whole text refers to similar element.For the sake of simple and clear and clear, it is thus well known that Function and structure will not be described in detail.

Fig. 1 illustrates structure of the pilot valve of existing cross valve in solenoid power-off, the pilot valve bag Valve body 1 is included, there is valve body 1 the first valve body 2, one end for hollow cylindrical to be connected with the first valve body 2 Columnar second valve body 3 of other end closure, and the lid 4 that is connected with the first valve body 2, so as to Valve body 1 it is fenced go out cavity to accommodate iron core 5, for make iron core towards in Fig. 1 to the left direction biasing bullet Spring 6, the piston rod 7 being connected with iron core 5, and piston rod 7 coordinate valve block 8 and act on valve block Elastic pressuring plate 13 on 8.Iron core 5 is located in the second valve body 3.First valve body 2 is that top has sky The cylinder in chamber, slide block 8, the widened section of piston rod 7 and elastic pressuring plate 13 accommodate the first valve body 2 Cavity in.The upper wall of the first valve body 2 offers first passage 21, bottom with three passages 22, 23、24.Valve block 8 faces 22,23,24 side of passage and has cavity 80.

Fig. 1 is illustrated that first mode of operation of the pilot valve of the prior art in solenoid power-off. In this mode, iron core 5 is not acted on by electromagnetic force, so as to iron core 5 is in the spring masterpiece of spring 6 It is moved to the left with so that valve block 8 is moved to the left and covers passage 22 and 23, in this state, Passage 22 and 23 is communicated, and passage 21 and 24 is communicated.At this moment, as shown in figure 9, because passage 24 with The right side connection of main valve 500 so that work of the piston of main valve 500 in the gases at high pressure from compressor Be moved to the left with, so that passage D is connected with E, channel C is connected with S, main valve 500 this Plant heating mode of the flow path corresponding to refrigerating circuit.

Fig. 2 shows second mode of operation of the pilot valve of the prior art when solenoid is powered, Under the pattern, iron core 5 overcomes the biasing force of spring 6 side shifting to the right under electromagnetic force, so as to Side shifting, to cover passage 23,24, in this state, is led to the right together for valve body 8 and piston rod 7 Road 21 and passage 22 are communicated, and passage 23 and 24 is communicated.At this moment, as shown in figure 9, because of passage 22 are connected with the left side of main valve 500 so that the piston of main valve 500 is in the gases at high pressure from compressor In the presence of move right so that passage D is connected with C, passage E is connected with S, main valve 500 This flow path corresponding to refrigerating circuit cooling/defrosting mode.

If can be seen that pilot valve from two kinds of mode of operations above will be maintained at the second mode of operation (i.e. Refrigerating circuit be in refrigeration/defrosting mode) under work a period of time, then valve block 8 will keep covering passage 23 and 24 and iron core 5 keep in right positions, this is accomplished by solenoid and is constantly in "on" position. This aspect can increase the consumption of electric energy, on the other hand, once because accident power-off, iron core 5 will Band movable valve block 8 moves to left side, into the first mode of operation so that the operation of pilot valve is out of hand.

The present invention is exactly improved to this, employs a kind of energy-conservation and reliable for moving movable valve block Structure so that electromagnetic force is applied to iron core 5 just when needing to switch between both of which only, When need not switch, solenoid is powered off.

Fig. 3 is the decomposition diagram of the pilot valve for cross valve of the invention.The pilot valve includes Valve body 1, valve body 1 include that the first valve body 2, one end of hollow cylindrical is connected another with the first valve body 2 Columnar second valve body 3 of end closure, and the lid 4 that is connected with the first valve body, so as to valve body 1 It is fenced go out cavity to accommodate iron core 5, for make iron core towards in Fig. 3 right direction biasing spring 6, and The rotor 9 that iron core 5 coordinates and is rotated, the piston rod 7 being connected with rotor 9 by distance piece 10, The valve block 8 that coordinates with piston rod 7 and act on elastic pressuring plate 13 on valve block 8.Iron core 5 and turn Son 9 is located in the second valve body 3.Piston rod 7 has cylindrical section 71 and general parallel orientation hexahedral shape Widened section 72, the widened section 72 have through hole 73, the shape of cross section of through hole 73 and the horizontal stroke of valve block 8 Cross sectional shape correspondence, to accommodate valve block 8.First valve body 2 has the cylinder of cavity, slide block for top 8th, the widened section 72 and elastic pressuring plate 13 of piston rod 7 is located in the cavity of the first valve body 2.First The upper wall of valve body 2 offers first passage 21, and bottom has three passages 22,23,24.Valve block 8 Face 22,23,24 side of passage and there is cavity 80, the length of cavity 80 is set to cover two phases Adjacent passage.

The side towards the first valve body 2 of rotor 9 has circular depressed 92, to accommodate between cylinder Spacing body 10, the thickness of the distance piece 10 are less than the depth of depression 92, so as to be installed in distance piece 10 Recessed space 95 (as shown in Figure 5) is left still after in 92 bottom of depression of rotor 9.Piston rod 7 Cylindrical section 71 be threadedly coupled through the right-hand member wall of the first valve body 2 with distance piece 10, specifically, Distance piece 10 has the screwed hole 101 positioned at center, the end of cylindrical section 71 and the screwed hole 101 Threaded connection, certainly, piston rod 7 is also not necessarily limited to be threadedly coupled with distance piece 10, and can be with this area Known other modes are fixed.Spring 6 is set on the cylindrical section 71 of piston rod 7, and one end is supported By the right-hand member wall of the first valve body 2, the other end against the distance piece 10 being contained in the depression 92 of rotor 9, The circumference that recessed space 95 in depression 92 limits spring 6 is mobile.

The periphery of iron core 5 is provided with solenoid (not shown), when solenoid is energized, can be right Iron core 5 produces electromagnetic force, and in figure, left side is mobile vertically to make iron core 5.

The end face in the face of iron core of rotor 9 has outline 93, and the outline 93 is faced with iron core 5 The outline 52 of the end face of rotor 9 interacts, so that mobile can the causing vertically of iron core 5 turns The movement and rotation of son 9.The periphery of rotor 9 is provided with multiple 91 (figures of rib in axial direction extending 3 are shown as in 3, but it is also possible to for more or less), it also is provided with the outer circumference surface of iron core 5 With the quantity identical of the rib 91 on rotor 9 rib 51 in axial direction.Rotor 9 is in the face of the first valve The side of body 2 has radial flange 94.

As shown in figure 4, the second valve body 3 is drum, there is on its inwall inwardly projecting thickening Part 31, has groove 33 and the Internal periphery 32 for axially extending in the reinforcement 31.Iron core 5 rib 51 can slide axially in the groove 33 of the second valve body 3, and the rib 91 of rotor 9 can be in spy To slide along groove in the groove 33 of the reinforcement 33 that the second valve body 3 is entered under fixed turned position. Internal diameter of the external diameter of the flange 94 of rotor 9 more than the reinforcement 31 of the second valve body 3, so that convex Edge 94 becomes rotor 9 along the stop part during slip of groove 33 of reinforcement 31.

Fig. 5 shows a kind of mode of operation of pilot valve, when being switched to the mode of operation, electromagnetic wire Circle be energized several seconds, iron core 5 in the presence of electromagnetic force by rib 51 along the slip of groove 33 to Move left, the outline 52 of 5 end face of iron core is engaged with the outline 93 of 9 end face of rotor, a side Face drive rotor 9 is moved to the left, and makes the rib 91 of rotor 9 remove groove 33, on the other hand in spring force And under the synergism of outline 93 and Internal periphery 32, rotor 9 rotates to an angle, with rib 91 The position is resisted against on the Internal periphery 32 of the second valve body 3 and is locked in, moving right for rotor 9 is limited It is dynamic.Caused by iron core 5, the drive piston rod 7 that is moved to the left of rotor 9 is moved to the left, while valve block 8 It is moved to the left, covers passage 22 and 23 so that passage 21 and 24 is communicated in the first valve body 2, at this moment, As shown in figure 9, because passage 24 is connected with the right side of main valve 500 so that the piston of main valve 500 is coming It is moved to the left from the presence of the gases at high pressure of compressor, so that passage D is connected with E, channel C Connect with S, this flow path of main valve 500 corresponds to the heating mode of refrigerating circuit.Now, Because rotor 9 is fixed by the Internal periphery 32 of spring force and the second valve body 3, rotor 9 is made to be maintained at first Position, solenoid can be with power-off, and pilot valve is always maintained at this mode of operation, until needs next time Carry out pattern switching.

Fig. 6 shows structure of the pilot valve of the present invention under another mode of operation, will be switched to this mould During formula, from the beginning of the position shown in Fig. 5, solenoid is energized several seconds, makes iron core 5 in electromagnetic force In the presence of slip by rib 51 in groove 33 and be moved to the left, 52 He of outline of iron core 5 The mutual of the outline 93 of rotor 5 is used so that rotor 9 rotates an angle while being slightly moved to the left Degree, so as to the rib 91 of rotor 9 is alignd with the groove 33 of the reinforcement 31 of the second valve body 3, in bullet In the presence of spring force, the rib 91 of rotor 9 is slided along groove 33 to the right, until the flange 94 of rotor 9 Backstop at the Internal periphery 32 of the reinforcement 31 of the second valve body 3, so as to rotor 9 is locked in second Position.The drive piston rod 7 that moves right of rotor 9 moves right, so as to what is be connected with piston rod 7 Valve block 8 also moves right, and covers passage 23 and 24, so that passage 21 and 22 is communicated, passage 23 and 24 communicate, at this moment, as shown in figure 9, because passage 22 is connected with the left side of main valve 500, making The piston for obtaining main valve 500 moves right in the presence of from the gases at high pressure of compressor, so that logical Road D is connected with C, and passage E is connected with S, and this flow path of main valve 500 is corresponded to and freezed back Cooling/the defrosting mode on road.Now, because rotor 9 is by spring force and the Internal periphery 32 of the second valve body 3 It is fixed, therefore, it can to solenoid power-off, until needing to be switched to another mode of operation.

That is, pilot valve only needs just to need to enter solenoid in the switching of the pattern that is operated Row is powered, and just can be always held under switched to pattern with power-off after the completion of pattern switching.

Fig. 7 and 8 shows in detail the reinforcement 31 of rotor 9, iron core 5 and the second valve body 3 Interaction between Internal periphery 32 and groove 33, Fig. 7 corresponding to the position in Fig. 5, Fig. 8 pair Position that should be in Fig. 6.

In the figure 7, iron core 5 has caused the rib 91 of rotor 9 to enter the Internal periphery 32 of reinforcement 31 Recess in, and be fixed on this.Under this position, if iron core 5 is moved down, by its end Outline 52 press the outline 93 of rotor 9, make rotor 9 that an angle is rotated while mobile, So as to cross the restriction of the recess of Internal periphery 32, turn to and align with the groove 33 of reinforcement 31, At this moment, in the presence of elastic force, rib 91 is moved along groove 33, until the flange 94 of rotor 9 is supported Inner profile 32.And it is fixed in this position, hence into state as shown in Figure 8.

In the state shown in fig. 8, drive rotor 9 is moved down by moving down for iron core 5, rib After 91 are moved across the stop of Internal periphery 32 of reinforcement 31, under spring force, because The interaction of the outline 93 of Internal periphery 32 and rotor 9 and slip into the Internal periphery 92 of reinforcement 31 Recess in, it is and fixed in this position, i.e., state as shown in Figure 7.

The switching between both states shown in Fig. 7 and Fig. 8 is respectively by being powered several to solenoid Second completes, after the completion of switching, because the position of rotor 5 is fixed, therefore, it is possible to electromagnetism Coil carries out power-off, and valve block 8 can keep covering the passage for expecting to cover, that is, the work needed for keeping Pattern, without leading to solenoid the pilot valve as prior art as shown in Figure 2 always Electricity, this causes the pilot valve of the present invention greatly to save electric energy, in addition, because rotor can be securely fixed In two positions, the stability of pilot valve operation is improve.

Additionally, as needed, pilot valve can sense iron core position residing at present with set location sensor Put, in order to avoid carry out maloperation.As seen in figures 3-6, pilot valve is located at the position of the closed end of the second valve body 3 Put sensor 11 and elastic component 12, position sensor is used to sense iron core location, so as to making User reports the state of current pilot valve and cross valve.The elastic component 12 for against iron core 5, to protect Hold the position of iron core 5.

The cross valve of the pilot valve with the present invention is especially non-when the mode of operation for refrigerating circuit switches Chang Youxiao.When refrigerating circuit is switched to heating mode from refrigeration/defrosting mode, solenoid is led to Several seconds of electricity, rotor are shifted onto the left side and itself rotation by iron core, adjust the position of rotor itself whereby simultaneously Stop in this position in coil blackout, as shown in Fig. 7 and Fig. 5.Position sense switch can be sensed This position is used as the heating mode of refrigerating circuit, and sends position to user or other external instruments Indicate.

When refrigeration/defrosting mode is switched to from heating mode, solenoid is once again powered up several seconds, is turned Son by iron core shift onto left side and itself rotation, whereby adjust rotor itself position from left side along the second valve Groove in body moves to right side and the position is rested in coil blackout, as shown in Fig. 8 and Fig. 6, Position switch senses this position as the refrigeration/defrosting mode of refrigerating circuit, and to user or other outside Portion's instrument sends position instruction.

Although the present invention illustrates the above-mentioned cross valve with pilot valve for refrigerating circuit, the present invention Cross valve can be used for other need change circulation path place.

Although the application has been described in detail with reference to embodiment, it is to be understood that, it is aforementioned only to show The illustration of example property embodiment, the application is not limited to disclosed specific embodiment, to disclosed reality Modification, the combination of the feature of disclosed embodiment and the other embodiment for applying example is embraced within appended power In the range of profit is required.

Claims

1. a kind of pilot valve for cross valve, including：

Valve body, the valve body have the first valve body and the second valve body being connected with one end of the first valve body；

First, second, third, fourth passage being located in the wall of the first valve body；

Iron core to move along the second valve body is located in the second valve body；

For the solenoid of iron core, can produce when the solenoid is energized makes iron core along valve body The electromagnetic force of axial movement；

Moved in the first valve body and by the movement of iron core between the first position and the second position Valve block, in first position, first passage and fourth lane are in fluid communication, and second channel and the Triple channel is in fluid communication, and in the second position, the first passage and second channel are in fluid communication, and Third channel and the 3rd four-way are in fluid communication；

The valve block can when solenoid is powered by the movement of iron core in first position and second Move between putting, and the first position and the second position are locked in solenoid power-off.

2. pilot valve as claimed in claim 1, wherein, the pilot valve includes using in the second valve body In the rotor engaged with iron core, the rotor is detachably connected with the valve block, and the rotor quilt Form fit is carried out towards the inwall and iron core of iron core fexible bias pressure, the rotor and the second valve body, So that the movement of the iron core causes rotor to carry out between the first position and the second position rotating and energy First position and the second position are locked in, so that valve block is locked in first position and the second position.

3. pilot valve as claimed in claim 2, wherein, the end face for facing iron core of the rotor is provided with Outline, the end face towards rotor of the iron core are provided with the outline for matching therewith, while the second valve The inwall of body has reinforcement, and the reinforcement is engaged with the outline with rotor end-face Internal periphery and the groove for axially extending, the rotor and the iron core are respectively on its outer circumference surface Axially extending rib is provided with, the rib of the iron core is always situated in the groove of the second valve body and along groove cunning It is dynamic, the rib of the rotor at first position against the second valve body Internal periphery, slide in the second position Enter groove.

4. pilot valve as claimed in claim 1, wherein, between first valve body and the rotor Spring is provided with, for providing the biasing force that rotor is biased to iron core.

5. pilot valve as claimed in claim 4, wherein, the valve block is connected with piston rod, the work Stopper rod is stretched in the second valve body through the end wall of the first valve body, and is connected with the rotor, the spring It is set on the piston rod.

6. pilot valve as claimed in claim 5, wherein, the side towards the first valve body of the rotor With circular shrinkage hole, a distance piece is arranged in the shrinkage pool, and the spring one end abuts against the first valve The end wall of body, the other end abut against the distance piece.

7. pilot valve as claimed in claim 6, wherein, the thickness of the distance piece is less than the shrinkage pool Depth, to limit the movement radially of the spring.

8. pilot valve as claimed in claim 1, also uses including being located in the blind end of second valve body In the position sensor of sensing plunger position, and it is located on the position sensor to keep the ferrum The elastic component of core position.

9. pilot valve as claimed in claim 3, wherein, the reinforcement of the inwall of second valve body With three or more grooves, the rotor and institute's iron core have three or more ribs.

10. a kind of cross valve, including：

Main valve, which includes：

The on high-tension side first passage of compressor that is connected in refrigerating circuit, it is respectively connecting to evaporation Second and fourth lane of device and condenser and it is connected to the four-way of compressor low-pressure side Road；And

For the piston for optionally making first passage be connected with second and fourth lane respectively, with And

Pilot valve as claimed in any one of claims 1-9 wherein, first passage and the main valve of the pilot valve First passage is communicated, and the third channel of pilot valve is connected with the third channel of main valve, the second channel of pilot valve It is connected with the side of the piston of main valve, the fourth lane of pilot valve is communicated with the opposite side of the piston of main valve, So as to the switching of the mode of operation of pilot valve causes the change of the connected relation between each passage of main valve.