CN203500561U - Double-stage four-way reversing valve - Google Patents

Abstract

The utility model discloses a double-stage four-way reversing valve and belongs to a refrigeration system valve piece. The conventional four-way reversing valve cannot independently meet a requirement of a refrigeration system on a large refrigeration amount of a small valve body by the adoption of a single-medium channel, and a plurality of the conventional four-way reversing valves difficultly realize synchronization of the reversing operation after being connected to be used. The double-stage four-way reversing valve comprises a main valve and a pilot valve and is characterized in that a piston of the main valve consists of three cylindrical members which are axially connected with one another; two grooves which are positioned on two opposite sides are formed in the cylindrical surface of each cylindrical member; the views of the cylindrical members are projected to be I-shaped; two adjacent cylindrical members are circumferentially staggered from each other by 90 degrees; eight valve holes formed in the valve body are connected with a medium conveying pipe; every two valve holes constitute a group along the axial direction of the valve body; the four groups of the valve holes are formed along the circumferential direction of the valve body; two of the valve holes adjacent to the circumferential direction of a working position are communicated with the grooves in the piston to form a medium channel; each working position is communicated with the valve holes through the grooves of the cylindrical member on the middle part of the piston and the grooves of the cylindrical member at one end of the piston simultaneously to form two medium channels. The double-stage four-way reversing valve is suitable for doubling of the refrigeration tonnage quantity and can achieve a double-stage refrigeration tonnage quantity.

Description

Twin-stage four-way change-over valve

Technical field

The utility model belongs to refrigeration system valve member, especially relevant with a kind of twin-stage four-way change-over valve.

Background technique

Large capacity four-way change-over valve is generally applied to, in heat pump type air conditioner, realize the change of refrigeration and heat-production functions by four-way change-over valve.Common large volume piston type four-way change-over valve is comprised of pilot valve and main valve, main valve comprises valve body and is arranged in the piston of valve cylinder-shaped inner chamber, body cavity is sealed by two end caps that are arranged at its two ends, piston is separated into left and right two chambers by body cavity, piston is axially connected as a single entity and forms by two cylindrical members, these two cylindrical members are all provided with two grooves on cylndrical surface, cylindrical member view are projected into I-shaped, two cylindrical members, 90 degree that circumferentially stagger; On valve body, be provided with 4 valve opening connecting media delivery pipes, medium transport pipe connects respectively sucking pipe, the outlet pipe of condenser, vaporizer and compressor, 4 valve openings circumferentially distribute along valve body, in working position, adjacent two valve openings are communicated with and consist of single medium channel with groove on piston, each working position only has the groove of a cylindrical member to be communicated with valve opening, moving axially by piston in valve body, the corresponding relation of change groove and valve opening, change the flow direction of medium, thereby realize commutation; Pilot valve generally comprises a selector valve and a solenoid valve forms, selector valve by air pipe respectively with left and right two chambers of valve body of main valve be connected the sucking pipe of compressor and the medium transport pipe of outlet pipe is communicated with, by the high-pressure medium in compressor exhaust pipe being transported to left chamber or the right chamber of valve body, realize promotion piston and move; On the end face of piston one end, be provided with axially directed positioning hole, guide-localization installs guide rod in hole, and guide rod is fixed on end cap.When large-tonnage refrigeration system is used, the refrigerating capacity that conventional little valve body four-way change-over valve adapts to cannot be satisfied the demand, conventionally in a system, connect two or more four-way change-over valves uses simultaneously, two four-way change-over valves are difficult to realize commutation action synchronously, affect stability and the refrigerating efficiency of refrigeration system, and cost is also relatively high, and space hold is large.

Model utility content

The purpose of this utility model is intended to solve current little valve body four-way change-over valve cannot adapt to separately large-tonnage refrigeration system needs, a plurality of connections are simultaneously used and cannot be realized again the synchronous problem of commutation action, provide a kind of and can meet with little valve body the twin-stage four-way change-over valve of large-tonnage refrigeration system needs.

For this reason, the utility model is by the following technical solutions: twin-stage four-way change-over valve, comprise main valve and pilot valve, main valve comprises valve body and is arranged in the piston of valve cylinder-shaped inner chamber, body cavity is sealed by two end caps that are arranged at valve body two ends, piston is separated into left and right two chambers by body cavity, piston is axially connected to form by three cylindrical members, each cylindrical member is provided with two grooves on cylndrical surface, two grooves are positioned at relative both sides, cylindrical member view is projected into I-shaped, adjacent two cylindrical members 90 degree that circumferentially stagger; On valve body, be provided with eight valve opening connecting media delivery pipes, every two valve openings are axially set to one group along valve body, and medium transport pipe connects respectively sucking pipe, the outlet pipe of condenser, vaporizer and compressor, and four groups of valve openings circumferentially arrange along valve body; In working position, circumferentially adjacent two valve openings are communicated with and consist of medium channel with groove on piston, each working position is by the cylindrical member in the middle of piston and wherein the groove while of the cylindrical member of one end is communicated with valve opening, form two medium channels, moving axially by piston in valve body, change the corresponding relation of groove and valve opening, change the flow direction of medium, thereby realize commutation; Circumferentially spaced wherein two groups of valve openings on the same group and close connection, are used simultaneously, connect respectively sucking pipe and the outlet pipe of compressor, and the valve opening of other two groups separates on the same group, connects respectively condenser and vaporizer; Pilot valve by air pipe respectively with left and right two chambers of valve body of main valve be connected the sucking pipe of compressor and the medium transport pipe of outlet pipe is communicated with, by the high-pressure medium in compressor exhaust pipe being transported to left chamber or the right chamber of valve body, realize promotion piston and move; On the end face of piston one end, be provided with axially directed positioning hole, guide-localization installs guide rod in hole, and guide rod is fixed on end cap.

As to technique scheme supplement and perfect, the utility model also comprises following additional technical feature.

Three cylindrical members of described composition piston are connected as a single entity in the axial direction.

Described piston is provided with axial center hole and the radial direction through hole being interconnected, and radial direction through hole is communicated with groove, and left chamber from center hole to valve body or right chamber conveying high-pressure medium by are accelerated the movement of piston, improve commutating speed; Wherein one end, transportable moving part center seal hole is set in center hole, guarantees an only chamber conveying wherein of high-pressure medium.

On the air pipe of described connection pilot valve and valve body left chamber or right chamber, valve is set, can when maintenance, closes air pipe, stop the chamber conveying high-pressure medium from pilot valve to valve body of main valve both sides, convenient for maintaining.

Described twin-stage four-way change-over valve also comprises the mounting bracket being fixedly connected with valve body of main valve, for the installation to four-way change-over valve, supports.

Use the utility model can reach following beneficial effect: by two valve openings are axially set on valve body, to form valve opening group, use wherein groove and the valve opening of two sections of three-section piston to form two medium channels, cold the amount that the four-way change-over valve of same size adapts to is more double than the four-way change-over valve of single medium channel, reach cold amount of twin-stage, the needs of large-tonnage refrigeration system with little valve body four-way change-over valve, have been met, reduced cost, saved space hold, and commutation synchronism is good, guarantee refrigeration system stable operation.

Accompanying drawing explanation

Fig. 1 is plan view of the present utility model.

Fig. 2 is left view of the present utility model.

Fig. 3 is right elevation of the present utility model.

Fig. 4 is the plan view of piston in the utility model.

Fig. 5 is the plan view of piston in the utility model.

Fig. 6 is the sectional drawing of piston in the utility model.

Fig. 7 is one of them pipe catenation principle figure that the utility model is used state one.

Fig. 8 is another pipe catenation principle figure that the utility model is used state one.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.

As shown in Fig. 1～Fig. 6, the utility model comprises main valve 2 and pilot valve 1, main valve 2 comprises valve body 12 and is arranged in the piston 16 of valve cylinder-shaped inner chamber, body cavity is by two end caps, 11 sealings that are arranged at valve body two ends, on valve body 12, be provided with eight valve openings, each valve opening connects a medium transport pipe, eight medium transport pipes are respectively S1 medium transport pipe 4, S2 medium transport pipe 5, D1 medium transport pipe 9, D2 medium transport pipe 8, E1 medium transport pipe 14, E2 medium transport pipe 7, C1 medium transport pipe 10, C2 medium transport pipe 13, S1 medium transport pipe 4 is axially arranged to one group with corresponding two valve openings that are connected of S2 medium transport pipe 5 along valve body, C1 medium transport pipe 10 is axially arranged to one group with corresponding two valve openings that are connected of E2 medium transport pipe 7 along valve body, D1 medium transport pipe 9 is axially arranged to one group with corresponding two valve openings that are connected of D2 medium transport pipe 8 along valve body, E1 medium transport pipe 14 is axially arranged to one group with corresponding two valve openings that are connected of C2 medium transport pipe 13 medium transport pipes along valve body, four groups of valve opening edges on valve body 12 circumferentially set gradually, piston 16 is separated into left and right two chambers by body cavity, piston 16 is axially connected as a single entity and forms by three cylindrical members, each cylindrical member is provided with two grooves on cylndrical surface, cylindrical member view is projected into I-shaped, adjacent two cylindrical members 90 degree that circumferentially stagger, on piston 16 one end end faces, be provided with axially directed positioning hole 17, in guide-localization hole 17, install guide rod, guide rod is fixed on end cap, piston 16 is provided with axial center hole 18 and the radial direction through hole 15 being interconnected, radial direction through hole 15 is communicated with described groove by passage, can be to left chamber or the right chamber conveying high-pressure medium of valve body by center hole 17, accelerate the movement of piston, improve commutating speed, the wherein one end in transportable moving part center seal hole is set in center hole 17, guarantees an only chamber conveying wherein of high-pressure medium, pilot valve 1 is communicated with the left and right chamber of valve body of main valve inner chamber by air pipe, on the air pipe of connection pilot valve and valve body left chamber or right chamber, valve 6 is set, can when maintenance, close air pipe, stop the chamber conveying high-pressure medium from pilot valve to valve body of main valve both sides, convenient for maintaining.On valve body of main valve 12, be installed with mounting bracket 3.

As shown in Fig. 7～Fig. 8, when the utility model is used, S1 medium transport pipe 4 and S2 medium transport pipe 5 are on the same group and close the sucking pipe that is connected and connects compressor, S1 medium transport pipe 4 is used with the valve opening that S2 medium transport pipe 5 is connected simultaneously, D1 medium transport pipe 9 is with D2 medium transport pipe 8 and close the outlet pipe that is connected and connects compressor, and D1 medium transport pipe 9 is used with the valve opening that D2 medium transport pipe 8 is connected simultaneously; Pilot valve 1 is communicated with S1 medium transport pipe 4 and D1 medium transport pipe 9 by air pipe, by the high-pressure medium in compressor exhaust pipe being transported to left chamber or the right chamber of valve body, realizes promotion piston and moves.

As shown in Figure 7, Figure 8, at use state for the moment, C1 medium transport pipe 10 on the same group and E2 medium transport pipe 7 are separately used, and namely connected valve opening is separately used, C1 medium transport pipe 10 connect as condenser, E2 medium transport pipe 7 connect as vaporizer, E1 medium transport pipe 14 on the same group and C2 medium transport pipe 13 separately used, and namely connected valve opening is separately used, E1 medium transport pipe 14 connect as vaporizer, C2 medium transport pipe 13 connect as condenser, piston 16 is in body cavity right end position, the groove of the cylindrical member in the middle of piston and the cylindrical member of left end works, the valve opening that S1 medium transport pipe 4 connects, the valve opening that a wherein side groove of piston left end cylindrical member is connected with E1 medium transport pipe 14 forms medium channel, the valve opening that C1 medium transport pipe 10 connects, the valve opening that the opposite side groove of piston left end cylindrical member is connected with D1 medium transport pipe 9 forms medium channel, the valve opening that S2 medium transport pipe 5 connects, the valve opening that a wherein side groove of piston intermediate cylindrical member is connected with E2 medium transport pipe 7 forms medium channel, the valve opening that C2 medium transport pipe 13 connects, the valve opening that the opposite side groove of piston intermediate cylindrical member is connected with D2 medium transport pipe 8 forms medium channel, two medium channels have so just been formed.

While commutating to needs, piston is from the slippage of body cavity right-hand member to left end, transfer use state two to, the groove of the cylindrical member in the middle of piston and the cylindrical member of right-hand member works, the valve opening that S1 medium transport pipe 4 connects, the valve opening that a wherein side groove of piston intermediate cylindrical member is connected with C1 medium transport pipe 10 forms medium channel, the valve opening that E1 medium transport pipe 14 connects, the valve opening that the opposite side groove of piston intermediate cylindrical member is connected with D1 medium transport pipe 9 forms medium channel, the valve opening that S2 medium transport pipe 5 connects, the valve opening that a wherein side groove of piston right-hand member cylindrical member is connected with C2 medium transport pipe 13 forms medium channel, the valve opening that E2 medium transport pipe 7 connects, the valve opening that the opposite side groove of piston right-hand member cylindrical member is connected with D2 medium transport pipe 8 forms medium channel, so form two medium channels, what C1 medium transport pipe 10 connected converts to as vaporizer, and what E2 medium transport pipe 7 connected converts to as condenser, and what E1 medium transport pipe 14 connected converts to as condenser, and what C2 medium transport pipe 13 connected converts to as vaporizer, realizes commutation.

Claims (5)

1. twin-stage four-way change-over valve, comprise main valve (2) and pilot valve (1), main valve (2) comprises valve body (12) and is arranged in the piston (16) of valve cylinder-shaped inner chamber, and body cavity is sealed by two end caps that are arranged at valve body two ends, and piston is separated into left and right two chambers by body cavity; Pilot valve by air pipe respectively with left and right two chambers of valve body of main valve be connected the sucking pipe of compressor and the medium transport pipe of outlet pipe is communicated with; On the end face of piston one end, be provided with axially directed positioning hole, guide-localization installs guide rod in hole, and guide rod is fixed on end cap; It is characterized in that: described piston is axially connected to form by three cylindrical members, each cylindrical member is provided with two grooves on cylndrical surface, two grooves are positioned at relative both sides, cylindrical member view are projected into I-shaped, adjacent two cylindrical members 90 degree that circumferentially stagger; On valve body, be provided with eight valve opening connecting media delivery pipes, every two valve openings are axially set to one group along valve body, and four groups of valve openings circumferentially arrange along valve body; Two valve openings circumferential adjacent in working position are communicated with composition medium channel with the groove on piston, each working position is by the cylindrical member in the middle of piston and wherein the groove while of the cylindrical member of one end is communicated with valve opening, form two medium channels, moving axially by piston in valve body, change the corresponding relation of groove and valve opening, change the flow direction of medium, thereby realize commutation.

2. twin-stage four-way change-over valve according to claim 1, it is characterized in that: described circumferentially spaced wherein two groups of valve openings on the same group and close connection, are used simultaneously, connect respectively sucking pipe and the outlet pipe of compressor, the valve opening of other two groups separates on the same group, connects respectively condenser and vaporizer.

3. twin-stage four-way change-over valve according to claim 2, is characterized in that: three cylindrical members of described composition piston are connected as a single entity in the axial direction.

4. according to the twin-stage four-way change-over valve described in claim 2 or 3, it is characterized in that: described piston is provided with axial center hole and the radial direction through hole being interconnected, radial direction through hole is communicated with described groove; Wherein one end, transportable moving part center seal hole is set in center hole.

5. twin-stage four-way change-over valve according to claim 4, is characterized in that: on the air pipe of described connection pilot valve and valve body left chamber or right chamber, valve is set.

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