CN105190136B - Rotary valve device - Google Patents
Rotary valve device Download PDFInfo
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- CN105190136B CN105190136B CN201380074846.3A CN201380074846A CN105190136B CN 105190136 B CN105190136 B CN 105190136B CN 201380074846 A CN201380074846 A CN 201380074846A CN 105190136 B CN105190136 B CN 105190136B
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- 229910000838 Al alloy Inorganic materials 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/072—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members
- F16K11/074—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with flat sealing faces
- F16K11/0743—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with flat sealing faces with both the supply and the discharge passages being on one side of the closure plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
- F16K3/10—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members with special arrangements for separating the sealing faces or for pressing them together
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/04—Devices for relieving the pressure on the sealing faces for sliding valves
- F16K39/045—Devices for relieving the pressure on the sealing faces for sliding valves of rotating or pivoting type
Abstract
Provided is a rotary valve device that can suppress the force for pressing a valve member against a valve seat surface. In a two-way valve (1), the cylindrical section (31) of a valve member (30) has a small-diameter cylindrical portion (31a), a large-diameter cylindrical portion (31b), and a cylindrical portion step surface (31c) formed between the outer peripheral surface (31a1) of the small-diameter cylindrical portion (31a) and the outer peripheral surface (31b1) of the large-diameter cylindrical portion (31b). Also, a valve main body (10) has a valve member support section (15) provided with: a small-diameter hole section (15a) to which the small-diameter cylindrical portion (31a) can rotatably fit; a large-diameter hole section (15b) to which the large-diameter cylindrical portion (31b) can rotatably fit; and a support section step surface (15c) formed between the inner peripheral surface (15a1) of the small-diameter hole section (15a) and the inner peripheral surface (15b1) of the large-diameter hole section (15b). Also, an annular seal ring (38) is provided in the seal space (R) encircled by the outer peripheral surface (31a1) of the small-diameter cylindrical portion, the cylindrical portion step surface (31c), the inner peripheral surface (15b1) of the valve large-diameter hole section, and the support section step surface (15c).
Description
Technical field
The present invention relates to switch accordingly determine with the stop position of this valve member multiple by the rotation of valve member
The rotary valve device of the connected relation of valve port.
Background technology
As conventional rotary valve device, the such as four-way switching valve disclosed in patent document 1 has as illustrated in fig. 18
Have：The cylindric valve chest 811 in big footpath；The path cylinder being blocked with upper end side integrally connected and the upper end of valve chest 811
The motor shell 812 of shape；By the another side opening to valve chest 811 carry out airtight in the way of be installed on this valve chest 811
Flat valve seat 813；With valve seat 813 towards the stacked revolving valve of valve seat 813a inside valve chest 811
Core 814；In figure above-below direction divides the space in valve chest 811 and is formed between pressure equalizing chamber 808 and valve chamber 809
Next door 807；It is built in the planet-gear speed reducer 815 of the pressure equalizing chamber 808 in valve chest 811；And stepper motor 820.
It is provided with the first switching port C1 (not shown) and the second switching port C2 in valve seat 813 and these switching ports C1, C2 can
The the first fixing port E1 connecting and the second fixing port E2 inversely.Valve element 814 is contained in valve chest 811, its cylindrical portion 814a energy
Enough through hole 807a being rotatably supported on the central authorities' setting in spaced walls 807, the skirt section with cylindrical portion 814a integrally connected
814b is overlapped with valve seat 813a.In this skirt section 814b, it is provided with the air tight communication hole always connecting with the second fixing port E2
814c.Valve element 814 is connected with the output shaft 815a of planet-gear speed reducer 815, rotates with the rotation of output shaft 815a.
This four-way switching valve 801 transmits the rotation of stepper motor 820 via planet-gear speed reducer 815 to valve element 814, and
Valve element 814 rotates to switch to stop position.Thus, when valve element 814 is in a stop position, by air tight communication hole
814c connects the second fixing port E2 and the second switching port C2 in the way of connecting, and makes the first fixing port E1 and the first switching port
C1 exposes in valve chamber 809 and connects these mouths in the way of connecting.And, when valve element 814 is in other stop position, lead to
Cross air tight communication hole 814c and connect the second fixing port E2 and the first switching port C1 in the way of connecting, and make the first fixing port E1
Expose in valve chamber 809 with the second switching port C2 and connect these mouths in the way of connecting.So, switch the connected relation of each mouth.
Such four-way switching valve 801 for example loads the system making cold-producing medium circulate between the indoor set and off-premises station of air-conditioning
Refrigerant cycle loop etc. and use.In this case, the second fixing port E2 of four-way switching valve 801 and the suction side of compressor connect
Connect.Therefore, the flow direction in the second fixing port E2 streaming flow is constant and Fluid pressure is also smaller, thus air tight communication hole
The pressure (Fluid pressure) of the cold-producing medium in 814c and in pressure equalizing chamber 808 will not significantly change and somewhat constant.
On the other hand, such rotary valve device for example also uses in loop of flow direction change of fluid etc..
Structure as the two-port valve of an example of rotary valve device used in loop of flow direction change in fluid etc.
As shown in Figure 19, Figure 20.
Two-port valve 901 shown in Figure 19 possesses valve body 910 and the valve member 930 being contained in valve body 910.Valve portion
Part 930 possesses and can be supported on cylindrical portion 931 and the skirt with cylindrical portion 931 integrally connected of valve body 910 around axis rotation
The valve element portion 933 of shape.Valve member 930 is contained in valve body 910, thus the space in valve body 910 is divided into valve chamber B
With back pressure chamber H.And, it is provided with seal member 938 between cylindrical portion 931 and valve body 910, using this seal member 938, come
Separate valve chamber B and back pressure chamber H with sealing against each other.Valve member 930 is applied to being integrally provided on valve body by helical spring 963
The power that 910 seat portion 920 pushes, the lower surface 933a in this valve element portion 933 is connected to the valve seat 922a of seat portion 920.?
The lower surface 933a in valve element portion 933 forms the airtight recess 934 of oriented valve element portion 933 extension, in this airtight recess 934 and valve seat
It is formed with confined space G between the 922a of face.And, in valve member 930, it is formed with confined space G and the back of the body of communicating valve core 933
The balancing orifice 936 of pressure chamber H.
In seat portion 920, it is formed with the first valve port P1 and the second valve port P2 in valve seat 922a opening.And, valve portion
Part 930 passes through rotary driving part 950 and rotates via rotation axle portion 940, to be opened and closed in the first valve port P1 and the second valve port P2
At least one party.Specifically, as shown in Figure 20 (a), the first valve port P1 and the second valve port P2 all exposes in valve chamber B and allows fluid
Flowing (valve opening state), or as shown in Figure 20 (b), Figure 20 (c), either one of the first valve port P1 and the second valve port P2 is by valve
The valve element portion 933 of part 930 covers (that is, exposing in confined space G), and the flowing of fluid is restricted (closed valve state).
And, for example, when either one of the first valve port P1 and the second valve port P2 is covered by the valve element portion 933 of valve member 930
And the flowing of fluid is when being restricted, if the flow direction change of fluid, in the Fluid pressure in valve chamber B and confined space G
And in back pressure chamber H between the Fluid pressure of (that is, the side being covered by valve element portion 933 in the first valve port P1 and the second valve port P2)
Relationship change, and according to circumstances different, because Fluid pressure is allowed to float from seat portion 920 with respect to valve member 930 effect
Power.
Therefore, set the power that valve member 930 is pushed on seat portion 920 of helical spring 963, even if so that in valve chamber B
In the case of the relationship change between Fluid pressure in interior Fluid pressure and confined space G and in back pressure chamber H, also will not
Float from seat portion 920.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2001-141093 publication
Content of the invention
Invent problem to be solved
In above-mentioned two-port valve 901, for example, because the form tolerance etc. of valve member 930 is various will be because putting on valve member
Produced by 930 Fluid pressure, the balance of power changes.Therefore, set produced this valve portion of pushing of helical spring 963
The power of part 930, even if so that in the case of worst example, valve member 930 also will not float from seat portion 920.
Hereinafter, with regard to the setting of helical spring 963, with reference to Figure 21～Figure 26, concrete example is illustrated.
For example, as shown in Figure 21 (a), in the case that valve member 930 is pushed on seat portion 920 by helical spring 963, recognize
It is that the outer peripheral edge 933a1 of the lower surface 933a in valve element portion 933 can be connected to valve seat 922a, and inner peripheral because of form tolerance
933a2 can leave from valve seat 922a.In this case, the lower surface 933a in valve element portion 933 is applied with the stream in confined space G
Body pressure.That is, as shown in Figure 21 (b), the position by the Fluid pressure in confined space G in valve member 930
Overlook the area (oblique line portion) in the outer peripheral edge 933a1 of lower surface 933a that area S1 becomes valve element portion 933.Hereinafter, should
Structure is referred to as " confined space max architecture ".
And, as shown in Figure 22 (a), in the case that valve member 930 is pushed on seat portion 920 by helical spring 963, recognize
It is that the inner peripheral 933a2 of the lower surface 933a in valve element portion 933 can be connected to valve seat 922a, and outer peripheral edge because of form tolerance
933a1 can leave from valve seat 922a.In this case, the lower surface 933a in valve element portion 933 is applied with the fluid pressure in valve chamber B
Power.That is, as shown in Figure 22 (b), the overlooking of the position by the Fluid pressure in confined space G in valve member 930
Area S2 becomes the area (oblique line portion) in the inner peripheral 933a2 of the lower surface 933a in valve element portion 933.Hereinafter, by this structure
It is referred to as " confined space minimal structure ".
And, for respectively in above-mentioned confined space max architecture and confined space minimal structure, in confined space G
And the situation higher than the Fluid pressure in valve chamber B of the Fluid pressure in back pressure chamber H and this four examples of low situation, below
Represent an example of the power to valve member 930 effect.
In the following description, the vertical view area SH of the upper surface 931a of the cylindrical portion 931 of valve member 930 is set to 380
Square millimeter (that is, the diameter D of cylindrical portion 931 being set to 22mm), by above-mentioned vertical view area S1 during confined space max architecture
(that is, the area in the outer peripheral edge 933a1 of lower surface 933a) is set to 385 square millimeters, will be upper during confined space minimal structure
State vertical view area S2 (that is, the area in the inner peripheral 933a2 of lower surface 933a) and be set to 250 square millimeters.
And, by situation higher than the Fluid pressure in valve chamber B for the Fluid pressure in confined space G and in back pressure chamber H
Under the pressure differential Δ P1 of above-mentioned Fluid pressure be set to 3.0MPa, by the Fluid pressure ratio in confined space G and in back pressure chamber H
The pressure differential Δ P2 of the above-mentioned Fluid pressure in the case that the Fluid pressure in valve chamber B is low is set to -3.0MPa.
It is by by the fluid in confined space G by power F1 that the Fluid pressure in confined space G acts on to valve member 930
Pressure differential (above-mentioned pressure differential Δ P1 or Δ P2) between Fluid pressure in pressure and valve chamber B is multiplied by valve member 930
By obtained from the vertical view area (above-mentioned vertical view area S1 or S2) of the position of the Fluid pressure in confined space G.By carrying on the back
Power F2 that Fluid pressure in pressure chamber H acts on to valve member 930 is by by the Fluid pressure in back pressure chamber H and valve chamber B
Pressure differential (above-mentioned pressure differential Δ P1 or Δ P2) between Fluid pressure be multiplied by valve member 930 by back pressure chamber H
Obtained from the vertical view area (above-mentioned vertical view area SH) of the position of Fluid pressure.And, below will push valve portion towards valve seat
The direction of part 930 is just set to.
(example 1：In confined space max architecture, the Fluid pressure in confined space G and in back pressure chamber H is than valve chamber B
The high situation of interior Fluid pressure)
In example 1 shown in Figure 23, become by power F1 that the Fluid pressure in confined space G acts on to valve member 930：
F1=(- Δ P1) × S1=-1155 [N] ... (1-1),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 930：
F2=Δ P1 × SH=1140 [N] ... (1-2).
Therefore, by above-mentioned formula, following power is acted on to valve member 930：
F=F1+F2=-15 [N],
That is, to make valve member 930 act on the power of 15 [N] in the way of valve seat 922a floats.In this situation
Under, need to push valve member 930 with the power at least over 15 [N] towards valve seat 922a using helical spring 963.
(example 2：In confined space minimal structure, the Fluid pressure in confined space G and in back pressure chamber H is than valve chamber B
The high situation of interior Fluid pressure)
In example 2 shown in Figure 24, become by power F1 that the Fluid pressure in confined space G acts on to valve member 930：
F1=(- Δ P1) × S2=-750 [N] ... (1-3),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 930：
F2=Δ P1 × SH=1140 [N] ... (1-4).
Therefore, by above-mentioned formula, following power is acted on to valve member 930：
F=F1+F2=390 [N],
That is, acting on the power of 390 [N] in the way of valve member 930 is pushed on valve seat 922a.In this situation
Under, even if not utilizing helical spring 963 to push valve member 930 towards valve seat 922a, valve member 930 also will not be from valve seat
922a floats.
(example 3：In confined space max architecture, the Fluid pressure in confined space G and in back pressure chamber H is than valve chamber B
The low situation of interior Fluid pressure)
In example 3 shown in Figure 25, become by power F1 that the Fluid pressure in confined space G acts on to valve member 930：
F1=(- Δ P2) × S1=1155 [N] ... (1-5),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 930：
F2=Δ P2 × SH=-1140 [N] ... (1-6).
Therefore, by above-mentioned formula, following power is acted on to valve member 930：
F=F1+F2=15 [N],
That is, acting on the power of 15 [N] in the way of valve member 930 is pushed on valve seat 922a.In this situation
Under, even if not utilizing helical spring 963 to push valve member 930 towards valve seat 922a, valve member 930 also will not be from valve seat
922a floats.
(example 4：In confined space minimal structure, the Fluid pressure in confined space G and in back pressure chamber H is than valve chamber B
The low situation of interior Fluid pressure)
In example 4 shown in Figure 26, become by power F1 that the Fluid pressure in confined space G acts on to valve member 930：
F1=(- Δ P2) × S2=750 [N] ... (1-7),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 930：
F2=Δ P2 × SH=-1140 [N] ... (1-8).
Therefore, by above-mentioned formula, following power is acted on to valve member 930：
F=F1+F2=-390 [N],
That is, to make valve member 930 act on the power of 390 [N] in the way of valve seat 922a floats.In this situation
Under, need to push valve member 930 with the power at least over 390 [N] towards valve seat 922a using helical spring 963.
In above-mentioned example 1～4, especially in the situation that the indoor Fluid pressure of back pressure is lower than the Fluid pressure in valve chamber
Example 4 in, power that valve member 930 floats from valve seat 922a becomes maximum.Therefore, for either case in example 1～4
Valve member 930 floats all without from valve seat 922a, and in the example 4 as worst example, makes the valve member 930 will not be from
Valve seat 922a floats.That is, helical spring 963 is produced pushes valve member 930 towards valve seat 922a
Power FS is set as at least over the power making valve member 930 float in example 4 that is, 390 [N].
However, in above-mentioned two-port valve 901, in the above-mentioned example 4 of supposition by produced for helical spring 963 towards valve seat
In the case that power FS of face 922a pushing valve member 930 is for example set to 391 [N], if becoming the state of above-mentioned example 2, relatively
In valve member 930, all apply to be pushed on power F (=390 [N]) of valve seat 922a by Fluid pressure and utilize helical spring 963
Power FS (=391 [N]) pushing towards valve seat 922a, and valve member 930 is pushed on by valve seat 922a with stronger power.Cause
This, drive the valve member 930 being pushed with such stronger power to be allowed to rotate the larger power of needs, thus exist to have to make
Rotary driving part 950 this problem of maximization.
Therefore, the problem of the present invention is to provide the rotary valve dress that can suppress the power that valve member is pushed on valve seat
Put.
For solving the scheme of problem
In order to solve above-mentioned problem, the invention described in scheme 1 is a kind of rotary valve device, possesses：Valve body, its
Inner side is provided with space；Seat portion, it has the plane valve seat towards above-mentioned space and in this valve seat opening two
Individual valve port；Valve member, it is configured in the way of being slidingly and rotatably overlapped in above-mentioned valve seat in above-mentioned space, by rotation
Transfer the connected relation of the above-mentioned two valve port that switching is accordingly determined with stop position；And pressing component, it is towards above-mentioned
Valve seat pushes above-mentioned valve member, and above-mentioned rotary valve device is characterised by, above-mentioned valve member has：Axle portion, it can be around
Axle center is rotatably supported on above-mentioned valve body；And valve element portion, its located at one end of above-mentioned axle portion, and with above-mentioned stop position pair
At least one of above-mentioned two valve port valve port should be opened and closed in ground, above-mentioned valve body passes through to divide above-mentioned space by above-mentioned valve member,
Thus there is the side being formed at above-mentioned axle portion and accommodating the valve chamber in above-mentioned valve element portion and the other end being formed at above-mentioned axle portion
The back pressure chamber of side, above-mentioned valve body or above-mentioned valve member have connect above-mentioned two valve port in by above-mentioned valve element portion opening and closing
The Jun Ya road of valve port and above-mentioned back pressure chamber, is configured to, when the Fluid pressure of above-mentioned back pressure chamber is lower than the Fluid pressure of above-mentioned valve chamber
Above-mentioned valve member in the Fluid pressure by above-mentioned back pressure chamber vertical view area, compare the Fluid pressure ratio of above-mentioned back pressure chamber
Above-mentioned vertical view area when the Fluid pressure of above-mentioned valve chamber is high is little.
In order to solve above-mentioned problem, the invention described in scheme 2 is a kind of rotary valve device, possesses：Valve body, its
Inner side is provided with space；Seat portion, it has towards the plane valve seat in above-mentioned space and many in this valve seat opening
Individual valve port；Valve member, it is configured in above-mentioned space in the way of being slidingly and rotatably overlapped in above-mentioned valve seat, and passes through
Rotate and to switch the connected relation of the above-mentioned multiple valve ports accordingly determining with stop position；And pressing component, it is towards upper
State valve seat and push above-mentioned valve member, above-mentioned rotary valve device is characterised by, above-mentioned valve member has：Axle portion, it can
Rotatably it is supported on above-mentioned valve body around axle center；And valve element portion, its located at one end of above-mentioned axle portion, and be provided with one or
Multiple airtight access, this one or more airtight access forms confined space between above-mentioned valve seat, and leads to
Cross this confined space and accordingly connect, with above-mentioned stop position, above-mentioned multiple valve ports that regulation combines, above-mentioned valve body pass through by
Above-mentioned valve member divides above-mentioned space, thus have the side being formed at above-mentioned axle portion and accommodate above-mentioned valve element portion valve chamber,
With the back pressure chamber of the another side being formed at above-mentioned axle portion, above-mentioned valve body or above-mentioned valve member have the above-mentioned airtight company of connection
The Jun Ya road of any one of path and above-mentioned back pressure chamber, is configured to, and the Fluid pressure of above-mentioned back pressure chamber is than the stream of above-mentioned valve chamber
The vertical view area of the Fluid pressure by above-mentioned back pressure chamber in above-mentioned valve member when body pressure is low, compares above-mentioned back pressure chamber
Above-mentioned vertical view area when Fluid pressure is higher than the Fluid pressure of above-mentioned valve chamber is little.
Invention according to described in scheme 1 or 2 for the invention described in scheme 3 it is characterised in that above-mentioned valve body with
Between above-mentioned valve member, it is provided with the seal member to the ring-type being sealed between them, and is configured to, when above-mentioned back pressure chamber
Fluid pressure higher than the Fluid pressure of above-mentioned valve chamber when above-mentioned seal member be pushed on above-mentioned valve member, and work as the above-mentioned back of the body
The Fluid pressure of pressure chamber when lower than the Fluid pressure of above-mentioned valve chamber above-mentioned seal member be pushed on above-mentioned valve body.
Invention according to described in scheme 3 for the invention described in scheme 4 is it is characterised in that the above-mentioned axle of above-mentioned valve member
Portion has：Path shaft portion, it is by end face towards configuring in the way of above-mentioned back pressure chamber；Big journal axle part, itself and this little journal axle
Partial other end is coaxially connected；And axle portion step surface, its be formed at the outer peripheral face of above-mentioned path shaft portion with above-mentioned
Between the outer peripheral face of big journal axle part, above-mentioned valve body has valve member support, and this valve member support is provided with：Diameter holes
Portion, above-mentioned path shaft portion is fitting for rotating by it；Large diameter hole portion, above-mentioned big journal axle part is fitting for revolving by it
Turn；And support step surface, it is formed between the inner peripheral surface of above-mentioned path hole portion and the inner peripheral surface in large diameter hole portion, above-mentioned close
Envelope part be arranged on by the outer peripheral face of above-mentioned path shaft portion, above-mentioned axle portion step surface, the inner peripheral surface in above-mentioned large diameter hole portion and
In the space that above-mentioned support step surface impales, so that the inner circumferential in the outer peripheral face to above-mentioned path shaft portion and above-mentioned large diameter hole portion
Sealed between face.
In order to solve above-mentioned problem, the invention described in scheme 5 is a kind of rotary valve device, possesses：Valve body, its
Inner side is provided with space；Seat portion, it has the plane valve seat towards above-mentioned space and in this valve seat opening two
Individual valve port；Valve member, it is configured in above-mentioned space in the way of being slidingly and rotatably overlapped in above-mentioned valve seat, and passes through
Rotate and to switch the connected relation of the above-mentioned two valve port accordingly determining with stop position；And pressing component, it is towards upper
State valve seat and push above-mentioned valve member, above-mentioned rotary valve device is characterised by, above-mentioned valve member has：Cylindrical portion, its energy
Enough rotatably it is supported on above-mentioned valve body around axle center；And valve element portion, it is connected with one end of above-mentioned cylindrical portion, and stops with above-mentioned
Stop bit puts accordingly at least one of opening and closing above-mentioned two valve port valve port, and above-mentioned valve body passes through to be divided by above-mentioned valve member
State space, thus there is the side being formed at above-mentioned cylindrical portion and accommodating the valve chamber in above-mentioned valve element portion and be formed at above-mentioned circle
The back pressure chamber of the another side in post portion, above-mentioned valve body or above-mentioned valve member have connect above-mentioned two valve port in by above-mentioned
The valve port of valve element portion opening and closing and the Jun Ya road of above-mentioned back pressure chamber, above-mentioned cylindrical portion has：Path column part, it is with end face face
Mode to above-mentioned back pressure chamber configures；Big footpath column part, it is coaxially connected with the other end of this path column part；With
And cylindrical portion step surface, its be formed at the outer peripheral face of the outer peripheral face of above-mentioned path column part and above-mentioned big footpath column part it
Between, above-mentioned valve body has valve member support, and this valve member support is provided with：Path hole portion, it is by above-mentioned path cylindrical portion
Divide and be fitting for rotating；Large diameter hole portion, above-mentioned big footpath column part is fitting for rotating by it；And support step
Face, it is formed between the inner peripheral surface of above-mentioned path hole portion and the inner peripheral surface in large diameter hole portion, by above-mentioned path column part
In the space that outer peripheral face, above-mentioned cylindrical portion step surface, the inner peripheral surface in above-mentioned large diameter hole portion and above-mentioned support step surface impale,
It is provided with the sealing of the ring-type sealed between the outer peripheral face to above-mentioned path column part and the inner peripheral surface in above-mentioned large diameter hole portion
Part.
In order to solve above-mentioned problem, the invention described in scheme 6 is a kind of rotary valve device, possesses：Valve body, its
Inner side is provided with space；Seat portion, it has towards the plane valve seat in above-mentioned space and many in this valve seat opening
Individual valve port；Valve member, it is configured in the way of being slidingly and rotatably overlapped in above-mentioned valve seat in above-mentioned space, by rotation
Transfer the connected relation of above-mentioned multiple valve ports that switching is accordingly determined with stop position；And pressing component, it is towards above-mentioned
Valve seat pushes above-mentioned valve member, and above-mentioned rotary valve device is characterised by, above-mentioned valve member has：Cylindrical portion, it can
Rotatably it is supported on above-mentioned valve body around axle center；And valve element portion, it is connected with one end of above-mentioned cylindrical portion, and is provided with one
Or multiple airtight access, this one or more airtight access forms confined space between above-mentioned valve seat, and
And above-mentioned multiple valve ports that regulation combines accordingly are connected with above-mentioned stop position by this confined space, above-mentioned valve body leads to
Cross and above-mentioned space is divided by above-mentioned valve member, thus there is the side being formed at above-mentioned cylindrical portion and accommodating above-mentioned valve element portion
Valve chamber and be formed at above-mentioned cylindrical portion another side back pressure chamber, above-mentioned valve body or above-mentioned valve member have in connection
State the Jun Ya road of any one of airtight access and above-mentioned back pressure chamber, above-mentioned cylindrical portion has：Path column part, it is with one
End face configures towards the mode of above-mentioned back pressure chamber；Big footpath column part, its other end with this path column part is coaxially
It is connected；And cylindrical portion step surface, it is formed at the outer of the outer peripheral face of above-mentioned path column part and above-mentioned big footpath column part
Between side face, above-mentioned valve body has valve member support, and this valve member support is provided with：Path hole portion, it is by above-mentioned path
Column part is fitting for rotating；Large diameter hole portion, above-mentioned big footpath column part is fitting for rotating by it；And support
Step surface, it is formed between the inner peripheral surface of above-mentioned path hole portion and the inner peripheral surface in large diameter hole portion, by above-mentioned path cylindrical portion
The sky that outer peripheral face, above-mentioned cylindrical portion step surface, the inner peripheral surface in above-mentioned large diameter hole portion and the above-mentioned support step surface dividing impales
Interior, it is provided with the ring-type sealed between the outer peripheral face to above-mentioned path column part and the inner peripheral surface in above-mentioned large diameter hole portion
Seal member.
The effect of invention is as follows.
Invention according to described in scheme 1,2, the valve portion when the Fluid pressure of back pressure chamber is lower than the Fluid pressure of valve chamber
The vertical view area of the Fluid pressure by back pressure chamber in part is configured to, and compares the fluid pressure than valve chamber for the Fluid pressure of back pressure chamber
Above-mentioned vertical view area when power is high and less.Like this, lower than the Fluid pressure in valve chamber in the indoor Fluid pressure of back pressure
In the case of, when being allowed to valve member effect from the power that valve seat floats by the indoor Fluid pressure of back pressure, due to valve member
In the area (that is, overlooking area) of the position of the Fluid pressure indoor by back pressure diminish, it is possible to reduce making valve member
The power floating from valve seat.Thereby, it is possible to reduce the power pushing valve member produced by pressing component towards valve seat, so as to
Valve member is pushed on the power of valve seat by enough suppression.
Invention according to described in scheme 3, between valve body and valve member, is provided with to the ring being sealed between them
The seal member of shape.And be configured to, when the Fluid pressure of back pressure chamber is higher than the Fluid pressure of valve chamber, seal member is pushed
In valve member, and seal member is pushed on valve body when the Fluid pressure of back pressure chamber is lower than the Fluid pressure of valve chamber.This
If sample, for for the seal member of the ring-type being sealed between valve body and valve member, apply in part thereof of face
Added with the Fluid pressure of back pressure chamber, it is applied with the Fluid pressure of valve chamber in the face of another part.And, if the stream when back pressure chamber
When the Fluid pressure of body pressure ratio valve chamber is high, seal member is pushed on valve member, then bowing in the face of a part for seal member
The Fluid pressure of the back pressure chamber that apparent area applies also puts on valve member.And if, when the Fluid pressure of back pressure chamber is than valve chamber
When Fluid pressure is low, seal member is pushed on valve body, then the stream of the valve chamber applying in the face of the another part of seal member
Body pressure also puts on valve body.That is, in valve member when the Fluid pressure of back pressure chamber is lower than the Fluid pressure of valve chamber
The vertical view area of the Fluid pressure by back pressure chamber (that is, direct or through seal member and indirectly overlooked by power
Area) be configured to, compare back pressure chamber Fluid pressure higher than the Fluid pressure of valve chamber when above-mentioned vertical view area and less.This
Sample, in the case that the indoor Fluid pressure of back pressure is lower than the Fluid pressure in valve chamber, when by the indoor Fluid pressure pair of back pressure
Valve member effect is allowed to when the power that valve seat floats, due to the position by back pressure indoor Fluid pressure in valve member
Area (that is, overlooking area) diminishes, it is possible to reducing the power making valve member float from valve seat.Thereby, it is possible to reduce pressing
Part is produced to push the power of valve member such that it is able to valve member is pushed on the power of valve seat by suppression towards valve seat.
Invention according to described in scheme 4, the axle portion of valve member has：By end face towards configuring in the way of back pressure chamber
Path shaft portion；The big journal axle part being coaxially connected with the other end of this path shaft portion；And it is formed at little diameter section
Axle portion step surface between the outer peripheral face dividing and the outer peripheral face of above-mentioned big journal axle part.Valve body has valve member support, should
Valve member support is provided with：Path shaft portion is fitting for the path hole portion that can rotate；Big journal axle part is fitting for can
The large diameter hole portion of rotation；And it is formed at the support step between the inner peripheral surface of path hole portion and the inner peripheral surface in large diameter hole portion
Face.And, seal member be arranged on by the outer peripheral face of path shaft portion, axle portion step surface, the inner peripheral surface in large diameter hole portion and
In the space that bearing portion step surface impales, to carry out close between the outer peripheral face to path shaft portion and the inner peripheral surface in large diameter hole portion
Envelope.Like this, enter between the inner peripheral surface in the large diameter hole portion of the outer peripheral face for the path shaft portion to valve member and valve body
For the seal member of ring-type of row sealing, it is applied with the Fluid pressure of back pressure chamber in part thereof of face, in another part
Face be applied with the Fluid pressure of valve chamber.And, the seal member when the Fluid pressure of back pressure chamber is higher than the Fluid pressure of valve chamber
It is pushed on the axle portion step surface of valve member, in the fluid overlooking the back pressure chamber that area applies in the face of a part for seal member
Pressure also puts on valve member.And, seal member is pushed when the Fluid pressure of back pressure chamber is lower than the Fluid pressure of valve chamber
In the support step surface of valve body, the Fluid pressure of the valve chamber applying in the face of the another part of seal member also puts on
Valve body.That is, in valve member when the Fluid pressure of back pressure chamber is lower than the Fluid pressure of valve chamber by back pressure chamber
The vertical view area (that is, direct or through seal member and be indirectly subject to the vertical view area of power) of Fluid pressure is configured to, phase
Above-mentioned vertical view area when higher than the Fluid pressure of valve chamber than the Fluid pressure of back pressure chamber and less.That is, in back pressure chamber
In the case that interior Fluid pressure is higher than the Fluid pressure in valve chamber, by back pressure indoor Fluid pressure, seal member is pushed on
Axle portion step surface, and applying back pressure in the position in the inner part of the external diameter than big journal axle part in the case of overlooking in valve member
Indoor Fluid pressure.And, in the case that the indoor Fluid pressure of back pressure is lower than the Fluid pressure in valve chamber, by valve chamber
Fluid pressure seal member is pushed on axle portion step surface, and in valve member overlook in the case of in ratio path shaft portion
External diameter position in the inner part apply the indoor Fluid pressure of back pressure.So, in the indoor Fluid pressure of back pressure than in valve chamber
In the case that Fluid pressure is low, when being allowed to valve member effect from the power that valve seat floats by the indoor Fluid pressure of back pressure,
Area (that is, overlooking area) due to the position by the indoor Fluid pressure of back pressure in valve member diminishes, it is possible to contracting
The little power making valve member float from valve seat.Valve member is pushed thereby, it is possible to reduce towards valve seat produced by pressing component
Power such that it is able to valve member is pushed on the power of valve seat by suppression.
Invention according to described in scheme 5,6, the cylindrical portion that can rotatably be supported on valve body around axle center has：With one
End face is towards the path column part that configures of mode of back pressure chamber；Coaxially it is connected with the other end of this path column part
Big footpath column part；And it is formed at the cylindrical portion between the outer peripheral face of path column part and the outer peripheral face of big footpath column part
Step surface.And, valve body has valve member support, this valve member support is provided with：Path column part by cylindrical portion
It is fitting for the path hole portion that can rotate；The big footpath column part of cylindrical portion is fitting for the large diameter hole portion that can rotate；And
It is formed at the support step surface between the inner peripheral surface of path hole portion and the inner peripheral surface in large diameter hole portion.And, by cylindrical portion
The outer peripheral face of path column part, cylindrical portion step surface, the inner peripheral surface in large diameter hole portion of the valve member support of valve body and
In the space that support step surface impales, it is provided with and carries out between the outer peripheral face to path column part and the inner peripheral surface in large diameter hole portion
The seal member of the ring-type of sealing.Like this, it is applied with valve chamber in the position of the cylindrical portion step surface side in seal member
Fluid pressure, the position of the support step surface side in seal member is applied with the indoor Fluid pressure of back pressure.Therefore, exist
In the case that the indoor Fluid pressure of back pressure is higher than the Fluid pressure in valve chamber, by the indoor Fluid pressure of back pressure by seal member
Be pushed on cylindrical portion step surface, and in valve member overlook in the case of in the external diameter than big footpath column part position in the inner part
Put and apply the indoor Fluid pressure of back pressure.And, in the indoor Fluid pressure of the back pressure situation lower than the Fluid pressure in valve chamber
Under, seal member is pushed on by cylindrical portion step surface by the Fluid pressure in valve chamber, and in valve member overlook in the case of
Apply the indoor Fluid pressure of back pressure in the position in the inner part of the external diameter than path column part.That is, it is indoor in back pressure
Fluid pressure lower than the Fluid pressure in valve chamber in the case of, when being allowed to valve member effect by the indoor Fluid pressure of back pressure
When the power that valve seat floats, due to being diminished by the area of the position of the indoor Fluid pressure of back pressure in valve member, so
The power making valve member float can be reduced from valve seat.Push towards valve seat produced by pressing component thereby, it is possible to reduce
The power of valve member is such that it is able to valve member is pushed on the power of valve seat by suppression.
Brief description
Fig. 1 is the longitudinal section of the two-port valve of the first embodiment of the present invention.
Fig. 2 is the amplification view of a part for the two-port valve being exaggerated Fig. 1.
Fig. 3 is the sectional view of the X-X line along Fig. 1, and (a) represents that valve member is in the state (valve opening of the first stop position
State), (b) represents that valve member is in the state (closing the closed valve state of the first valve port) of the second stop position, and (c) represents valve
Part is in the state (closing the closed valve state of the second valve port) of the 3rd stop position.
Fig. 4 is scheming of the position of Fluid pressure in the confined space by valve element portion illustrating in valve member, and (a) is valve
The confined space of core become maximum in the case of valve member sectional view, (b) is the structure in the valve member possessing (a)
Observe the top view of valve seat from axle L direction in (max architecture in confined space).
Fig. 5 is scheming of the position of Fluid pressure in the confined space by valve element portion illustrating in valve member, and (a) is valve
The confined space of core become minimum in the case of valve member sectional view, (b) is the structure in the valve member possessing (a)
Observe the top view of valve seat from axle L direction in (minimal structure in confined space).
Fig. 6 is the figure of the action of the two-port valve that Fig. 1 is described, (a) is the longitudinal section of two-port valve, and (b) is to see from axle L direction
Examine the top view of the valve seat of (a), (c) is the amplification view (example 1 of the part being exaggerated (a)：Maximum in confined space
In structure, in confined space and the indoor Fluid pressure of the back pressure situation higher than the Fluid pressure in valve chamber).
Fig. 7 is the figure of the action of the two-port valve that Fig. 1 is described, (a) is the longitudinal section of two-port valve, and (b) is to see from axle L direction
Examine the top view of the valve seat of (a), (c) is the amplification view (example 2 of the part being exaggerated (a)：Minimum in confined space
In structure, in confined space and the indoor Fluid pressure of the back pressure situation higher than the Fluid pressure in valve chamber).
Fig. 8 is the figure of the action of the two-port valve that Fig. 1 is described, (a) is the longitudinal section of two-port valve, and (b) is to see from axle L direction
Examine the top view of the valve seat of (a), (c) is the amplification view (example 3 of the part being exaggerated (a)：Maximum in confined space
In structure, in confined space and the indoor Fluid pressure of the back pressure situation lower than the Fluid pressure in valve chamber).
Fig. 9 is the figure of the action of the two-port valve that Fig. 1 is described, (a) is the longitudinal section of two-port valve, and (b) is to see from axle L direction
Examine the top view of the valve seat of (a), (c) is the amplification view (example 4 of the part being exaggerated (a)：Minimum in confined space
In structure, in confined space and the indoor Fluid pressure of the back pressure situation lower than the Fluid pressure in valve chamber).
Figure 10 is the longitudinal section of the flow channel switching valve of second embodiment of the present invention.
Figure 11 is the sectional view of the X-X line along Figure 10, and (a) represents that valve member is in the state of the first stop position,
B () represents that valve member is in the state of the second stop position.
Figure 12 is scheming of the position of Fluid pressure in the confined space by valve element portion illustrating in valve member, and (a) is
The confined space in valve element portion become maximum in the case of valve member sectional view, (b) is the structure in the valve member possessing (a)
Observe the top view of valve seat from axle L direction in (max architecture in confined space).
Figure 13 is scheming of the position of Fluid pressure in the confined space by valve element portion illustrating in valve member, and (a) is
The confined space in valve element portion become minimum in the case of valve member sectional view, (b) is the structure in the valve member possessing (a)
Observe the top view of valve seat from axle L direction in (minimal structure in confined space).
Figure 14 is the figure of the action of the flow channel switching valve that Figure 10 is described, (a) is the longitudinal section of flow channel switching valve, and (b) is
Observe the top view of the valve seat of (a) from axle L direction, (c) is the amplification view (example 1 of the part being exaggerated (a)：?
In confined space max architecture, in confined space and the indoor Fluid pressure of back pressure feelings higher than the Fluid pressure in valve chamber
Condition).
Figure 15 is the figure of the action of the flow channel switching valve that Figure 10 is described, (a) is the longitudinal section of flow channel switching valve, and (b) is
Observe the top view of the valve seat of (a) from axle L direction, (c) is the amplification view (example 2 of the part being exaggerated (a)：?
In confined space minimal structure, in confined space and the indoor Fluid pressure of back pressure feelings higher than the Fluid pressure in valve chamber
Condition).
Figure 16 is the figure of the action of the flow channel switching valve that Figure 10 is described, (a) is the longitudinal section of flow channel switching valve, and (b) is
Observe the top view of the valve seat of (a) from axle L direction, (c) is the amplification view (example of the part being exaggerated Figure 16 (a)
3：In confined space max architecture, the Fluid pressure of in confined space and back pressure interior is lower than the Fluid pressure in valve chamber
Situation).
Figure 17 is the figure of the action of the flow channel switching valve that Figure 10 is described, (a) is the longitudinal section of flow channel switching valve, and (b) is
Observe the top view of the valve seat of (a) from axle L direction, (c) is the amplification view (example 4 of the part being exaggerated (a)：?
In confined space minimal structure, in confined space and the indoor Fluid pressure of back pressure feelings lower than the Fluid pressure in valve chamber
Condition).
Figure 18 is the longitudinal section of the four-way switching valve of an example of conventional rotary valve device.
Figure 19 is the longitudinal section of the two-port valve of another one example of conventional rotary valve device.
Figure 20 is the sectional view of the X-X line along Figure 19, and the state that (a) expression valve member is in the first stop position (is opened
Valve state), (b) represents that valve member is in the state (closing the closed valve state of the first valve port) of the second stop position, and (c) represents
Valve member is in the state (closing the closed valve state of the second valve port) of the 3rd stop position.
Figure 21 is the Fluid pressure in the confined space by valve element portion in the valve member of the two-port valve that Figure 19 is described
The figure of position, (a) be valve element portion confined space become maximum in the case of valve member sectional view, (b) is that possessing (a)
The structure (max architecture in confined space) of valve member in from axle L direction observe valve seat top view.
Figure 22 is the Fluid pressure in the confined space by valve element portion in the valve member of the two-port valve that Figure 19 is described
The figure of position, (a) be valve element portion confined space become minimum in the case of valve member sectional view, (b) is that possessing (a)
The structure (minimal structure in confined space) of valve member in from axle L direction observe valve seat top view.
Figure 23 is the figure of the action of the two-port valve that Figure 19 is described, (a) is the longitudinal section of two-port valve, and (b) is from axle L direction
Observe the top view (example 1 of the valve seat of (a)：In confined space max architecture, the stream of in confined space and back pressure interior
The high situation of Fluid pressure in body pressure ratio valve chamber).
Figure 24 is the figure of the action of the two-port valve that Figure 19 is described, (a) is the longitudinal section of two-port valve, and (b) is from axle L direction
Observe the top view (example 2 of the valve seat of (a)：In confined space minimal structure, the stream of in confined space and back pressure interior
The high situation of Fluid pressure in body pressure ratio valve chamber).
Figure 25 is the figure of the action of the two-port valve that Figure 19 is described, (a) is the longitudinal section of two-port valve, and (b) is from axle L direction
Observe the top view (example 3 of the valve seat of (a)：In confined space max architecture, the stream of in confined space and back pressure interior
The low situation of Fluid pressure in body pressure ratio valve chamber).
Figure 26 is the figure of the action of the two-port valve that Figure 19 is described, (a) is the longitudinal section of two-port valve, and (b) is from axle L direction
Observe the top view (example 4 of the valve seat of (a)：In confined space minimal structure, the stream of in confined space and back pressure interior
The low situation of Fluid pressure in body pressure ratio valve chamber).
Specific embodiment
(first embodiment)
Hereinafter, for the two-port valve of the first embodiment of the rotary valve device as the present invention, with reference to Fig. 1～Fig. 3
Structure is illustrated, and with reference to Fig. 4～Fig. 9, action is illustrated.
Fig. 1 is the longitudinal section of the two-port valve of the first embodiment of the present invention.Fig. 2 is the two-port valve being exaggerated Fig. 1
The amplification view of a part.Fig. 3 is the sectional view of the X-X line along Fig. 1, and (a) represents that valve member is in the first stop position
State (valve opening state), (b) represents that valve member is in the state of the second stop position and (closes the valve closing shape of the first valve port
State), (c) represents that valve member is in the state (closing the closed valve state of the second valve port) of the 3rd stop position.Additionally, following say
The concept of " upper and lower " in bright and corresponding up and down in Fig. 1, the relative position relationship of each part of expression, do not indicate that absolute position
Put relation.
The flow direction that the two-port valve (each in figure is represented with symbol 1) of first embodiment is e.g. disposed in fluid is sent out
The loop of changing and the two-port valve for allowing or limiting the flowing of fluid etc..
As shown in FIG. 1 to 3, the two-port valve 1 of present embodiment has valve body 10, seat portion 20, valve member 30, sealing
Circle 38, rotation axle portion 40, rotary driving part 50 and helical spring 63.
Valve body 10 is for example constituted with stainless steel, aluminium alloy etc. as material, has the Part I of substantially cylindrical shape
11 and blocking Part I 11 in figure above one end and be fixably attached to the substantially discoideus of this Part I 11
Part II 12.
In the central portion of Part II 12, it is formed with the rounded circular through hole of the vertical view of this Part II 12 of insertion
13.It is orthogonal with the valve seat 22a of seat portion 20 described later that this circular through hole 13 is set to its axle L.
Bearing insertion section 14 above the in figure in circular through hole 13, rotation axle portion 40 described later is supported and is by insertion
The bearing portion 16 that can rotate, and this bearing portion 16 is regularly located at Part II 12.
And, the valve member support 15 below the in figure in circular through hole 13, is provided with little side by side along axle L direction
Footpath hole portion 15a and large diameter hole portion 15b, wherein, path hole portion 15a is by the path cylinder in the cylindrical portion 31 of valve member 30 described later
Part 31a is fitting for rotating, and the big footpath column part 31b in this cylindrical portion 31 is fitting for revolving by large diameter hole portion 15b
Turn and diameter is bigger than the diameter of path hole portion 15a.And, the inner peripheral surface 15a1 in path hole portion 15a and large diameter hole portion 15b
Inner peripheral surface 15b1 between, be provided with the support of orthogonal with above-mentioned inner peripheral surface 15a1 and inner peripheral surface 15b1 (inclusion is substantially orthogonal)
Step surface 15c.
Valve using the inner space 11a of Part I 11 and the circular through hole 13 of the Part II 12 communicating therewith
Space in parts carry portion 15, is formed with space Q inside valve body 10.By close between Part I 11 and Part II 12
Seal 66 seals, and is sealed by sealing ring 67 between bearing portion 16 and Part II 12.
Seat portion 20 has：With this in the way of blocking the other end below the in figure of Part I 11 of valve body 10
The seat portion main body 21 that Part I 11 is integrally provided；And be regularly overlapped in seat portion main body 21 towards valve body 10
Thin-plate member 22 in the interior plane of space Q side.
And, seat portion 20 is provided with as two being arranged in the way of insertion seat portion main body 21 and thin-plate member 22
First valve port P1 of valve port and the second valve port P2.In the present embodiment, overlook situation from the direction orthogonal with valve seat 22a
Under, the first valve port P1 and the second valve port P2 configures on the circumference centered on axle L.
The thin-plate member 22 of seat portion 20 is for example constituted with stainless steel etc. as material, possesses towards the sky in valve body 10
Between Q plane valve seat 22a.This valve seat 22a is with arranged opposite at spaced intervals with the Part II 12 of valve body 10.
Valve member 30 is provided integrally with：Cylindrical portion 31；And end (that is, the cylinder below the in figure of cylindrical portion 31
The one end in portion 31) valve element portion 33.Valve member 30 is contained in the space Q in valve body 10.
Cylindrical portion 31 is provided integrally with：Path column part 31a；And it is coaxially connected and straight with path column part 31a
The footpath big footpath column part 31b bigger than the diameter of this path column part 31a.And, the outer peripheral face in path column part 31a
Between the outer peripheral face 31b1 of 31a1 and big footpath column part 31b, it is provided with orthogonal with above-mentioned outer peripheral face 31a1 and outer peripheral face 31b1
The cylindrical portion step surface 31c of (inclusion is substantially orthogonal).Path column part 31a is formed as the valve that external diameter is than above-mentioned valve body 10
The internal diameter of path hole portion 15a in parts carry portion 15 is slightly smaller.And, big footpath column part 31b is formed as external diameter than above-mentioned valve
The internal diameter of the large diameter hole portion 15b of the valve member support 15 of main body 10 is slightly smaller.Cylindrical portion 31 is with its axle and circular through hole 13
The overlapping mode of axle L is embedded in valve member support 15.Thus, cylindrical portion 31 (i.e. valve member 30) is by this valve member support 15
Support as rotating around axle center.Cylindrical portion 31 is equivalent to an example of axle portion.In addition, path column part 31a, big footpath circle
Post part 31b and cylindrical portion step surface 31c are respectively equivalent to the one of path shaft portion, big journal axle part and axle portion step surface
Individual example.
The outer peripheral face 31a1 of the path column part 31a by cylindrical portion 31, the cylindrical portion step surface 31c of cylindrical portion 31,
The support step surface 15c of the inner peripheral surface 15b1 of large diameter hole portion 15b of valve member support 15 and valve member support 15 encloses
Sealing space R rising, is equipped with sealing ring 38.
Sealing ring 38 is for example made up of the relatively more soft elastomeric material such as nitrile rubber, silicone rubber.Sealing ring 38 is not
Be formed as circular (ring-type) from the state (state of non-elastic deformation) of externally applied force.The internal diameter of sealing ring 38 is formed as
Less than the external diameter of the path column part 31a of cylindrical portion 31, the external diameter of sealing ring 38 is formed as bigger than valve member support 15
The internal diameter of footpath hole portion 15b is big.Thus, if sealing ring 38 is contained in above-mentioned sealing space R, diametrically it is extruded, and can revolve
Turn ground in the outer peripheral face 31a1 of path column part 31a and the large diameter hole portion 15b of valve member support 15 of cylindrical portion 31
Sealed between side face 15b1.Position (that is, other the one of seal member to the cylindrical portion step surface 31c side of sealing ring 38
Partial face) it is applied with Fluid pressure in valve chamber B, and to the position of the support step surface 15c side of sealing ring 38 (i.e.,
The face of a part for seal member) it is applied with Fluid pressure in back pressure chamber H.Sealing ring 38 is equivalent to an example of seal member
Son.
And, the length of cylindrical portion 31 is identical with the length of the valve member support 15 of circular through hole 13 or than it slightly
Short, the part configuration of the entirety of path column part 31a and big footpath column part 31b is in this valve member support 15.
Thus, the upper surface 31d above the in figure of cylindrical portion 31 (that is, the end face of path column part 31a) side formed airtight
Space (hereinafter referred to as " back pressure chamber H ").That is, valve member 30 arranges and is, end face 31d side thereon, and with valve body
Form the back pressure chamber H going out with the model split of a part for sealing space Q between 10 Part II 12.And, by sky
Between arrange valve member 30 in Q, by the another part of this space Q that is, the Part I 11 of valve body 10 inner space
11a is divided with back pressure chamber H as valve chamber B.Accommodate valve element portion 33 described later in the inner space 11a of this Part I 11.Change
Yan Zhi, by dividing space Q by valve member 30, and valve body 10 has the side being formed at cylindrical portion 31 and accommodates valve element portion
33 valve chamber B and be formed at cylindrical portion 31 another side back pressure chamber H.
In addition, cylindrical portion 31 is provided with, in upper surface 31d opening, the rotation that the one end 41 for rotation axle portion 40 described later is installed
Shaft installing hole 32.The minor diameter part 32a of this rotation axle portion installing hole 32 and diameter large-diameter portion 32b bigger than the diameter of minor diameter part
It is connected to form in the vertical direction.The external diameter of the one end 41 than rotation axle portion 40 for the diameter of minor diameter part 32a is slightly larger.Large-diameter portion
The diameter of 32b is more slightly larger than the external diameter of helical spring 63.
Valve element portion 33 is formed as the radially projecting skirt shape along cylindrical portion 31, and in the vertical view observed from axle L direction
In the case of be shaped generally as fan shape.In the present embodiment, valve element portion 33 and one end of cylindrical portion 31 integratedly conjointly set
Put.Certainly, in addition to such structure, valve element portion 33 mutually can also be individually formed with cylindrical portion 31, and via connection member
Conjointly arrange Deng the one end with cylindrical portion 31.Valve element portion 33 configures in the valve chamber B (inner space 11a) of valve body 10.Valve
The lower surface 33a of core 33 is formed as plane, slidingly and rotatably can closely be overlapped in the valve seat 22a of seat portion 20.?
The lower surface 33a in valve element portion 33 is provided with the airtight recess 34 to this valve element portion 33 inner side extension.
Airtight recess 34 is formed as along the profile in valve element portion 33 and hollows out the shape of the inner side in valve element portion 33, from axle L side
It is shaped generally as fan shape in the case of the vertical view observed.Airtight recess 34 by overlapping with valve seat 22a, and with this valve seat
Form confined space G between the 22a of face.First valve port P1 or the second valve port P2 are covered and in confined space G by valve element portion 33
Expose, thus mutually separate the first valve port P1 or the second valve port P2, and be limited between the first valve port P1 and the second valve port P2
The flowing of the fluid of flowing.
In addition, in valve member 30, being communicated with the rotation axle portion installing hole 32 of cylindrical portion 31 and all pressures of airtight recess 34
Road 36.Using this Jun Ya road 36, by rotation axle portion installing hole 32 to connect the confined air of airtight recess 34 by way of connecting
Between G (that is, first valve port P1 being opened and closed by valve element portion 33 or the second valve port P2) and back pressure chamber H.Additionally, in this enforcement
In mode, Jun Ya road 36 is located at valve member 30, but is not limited to this.For example, for example only it is opened and closed the first valve port in valve member 30
It is also possible to arrange the Jun Ya road connecting the first valve port P1 and back pressure chamber H in valve body 10 in the structure of P1.
When being in the first stop position shown in Fig. 3 (a) when valve member 30, valve element portion 33 is not utilized to cover the first valve port P1
And second valve port P2 any one, above-mentioned first valve port P1 and the second valve port P2 exposes in valve chamber B and allows the flowing of fluid
(valve opening state).
And if, making valve member 30 be rotated clockwise to Fig. 3 (b) institute from first stop position of Fig. 3 (a) along in figure
The second stop position showing, then cover the first valve port P1 by the valve element portion 33 of valve member 30.Thus, the first valve port P1 is in confined air
Between expose in G, the second valve port P2 exposes in valve chamber B, and mutually separates the first valve port P1 or the second valve port P2, thus
Between one valve port P1 and the second valve port P2, the flowing of the fluid of flowing is restricted (closed valve state).
And if, making valve member 30 from first stop position of Fig. 3 (a) along in figure counterclockwise rotates to Fig. 3 (c) institute
The 3rd stop position showing, then cover the second valve port P2 by the valve element portion 33 of valve member 30.Thus, the second valve port P2 is in confined air
Between expose in G, the first valve port P1 exposes in valve chamber B, and mutually separates the first valve port P1 or the second valve port P2, thus
Between one valve port P1 and the second valve port P2, the flowing of the fluid of flowing is restricted (closed valve state).
In valve body 10 and valve member 30, it is provided with and valve member 30 is revolved along clockwise direction more than the second stop position
Turn and rotate, more than the 3rd stop position, a pair of the rotary position-limit mechanism (not shown) being limited in the counterclockwise direction.
Or or following structure etc.：The test section that sensor of the anglec of rotation by detection valve member 30 etc. etc. is constituted is set,
And based on anglec of rotation of valve member 30 being detected by this test section etc., control rotary driving part 50 described later, so that valve portion
Part 30 stops at the second stop position and the 3rd stop position.
Rotation axle portion 40 is formed as cylindric, and one end 41 is installed on valve member 30, the other end 42 insertion valve body 10
Part II 12 and protruding to the outside.And, in the way of the axle rotating axle portion 40 is overlapping with the axle L of circular through hole 13,
The central portion 43 of rotation axle portion 40 is supported as rotating by the bearing portion 16 of the Part II 12 located at valve body 10.
The one end 41 of rotation axle portion 40 is configured to, and inserts in the inner side of helical spring 63, and the rotation in valve member 30
Shaft installing hole 32 inserts.Now, helical spring 63 with compressive state be clamped in located at rotation axle portion 40 flange shape
Between spring seat portions 44 and stage portion 32c, this stage portion 32c is located at the minor diameter part 32a rotating in axle portion installing hole 32 and big footpath
Between portion 32b.Thus, press valve member 30 using helical spring 63 towards valve seat 22a.Helical spring 63 is equivalent to press section
One example of part.
And, the one end 41 in rotation axle portion 40, is provided with the protuberance (not shown) being formed in its outer peripheral face, in rotary shaft
The inner peripheral surface of the minor diameter part 32a of portion's installing hole 32, is provided with recess (not shown), this recess be formed as this protuberance with axle L be
Locking in the direction of rotation at center.Thus, rotation axle portion 40 can move along axle L direction with respect to valve member 30, and if revolving
Shaft 40 is rotated centered on axle L, then raised part and above-mentioned recess is locking and valve member 30 is revolved together with rotation axle portion 40
Turn.
Rotation axle portion 40, by with the in figure of spring seat portions 44 above spaced apart in the way of be provided with the first flange part 45,
And by with the in figure of the first flange part 45 above spaced apart in the way of be provided with the second flange part 46.First flange part 45 and
The external diameter of the second flange part 46 is roughly the same with the internal diameter of the bearing portion 16 of valve body 10.In spring seat portions 44 and the first flange part
It is equipped with the first sealing ring 61 between 45, and be equipped with the second sealing ring between the first flange part 45 and the second flange part 46
62, sealed between bearing portion 16 and rotation axle portion 40 using above-mentioned first sealing ring 61 and the second sealing ring 62.
First sealing ring 61 and the second sealing ring 62 are for example by the elastic material that nitrile rubber, silicone rubber etc. are relatively more soft
Material is constituted.First sealing ring 61 and the second sealing ring 62 be not from the state (state of non-elastic deformation) of externally applied force
Be formed as circular (ring-type), the external diameter of the central portion 43 than rotation axle portion 40 for its internal diameter is slightly smaller, and its external diameter compares bearing portion
16 internal diameter is slightly larger.
The rotation axle portion 40 that rotary driving part 50 is arranged in the upper surface 12a of the Part II 12 of valve body 10 is projected
Position near.Rotary driving part 50 has：The motor part 51 being made up of d.c. motor；It is fixably attached to the horse of motor part 51
Reach the first gear 52 of axle 51a；And be fixably attached to rotate the another of axle portion 40 in the way of engaging with first gear 52
The second gear 53 of end 42.If to motor part 51 supply electric power, rotary driving part 50 makes motor drive shaft 51a rotate, this rotation
Rotation axle portion 40 is made to rotate centered on axle L by first gear 52 and second gear 53.In the present embodiment, by one
Gear (first gear 52 and second gear 53) is constituted with reducing gear but it is also possible to constitute reductor by more gears
Structure.This reducing gear can also be made up of planetary gear.
Next, one example of the action of the two-port valve 1 to present embodiment illustrates with reference to Fig. 4～Fig. 9.
Fig. 4 is scheming of the position of Fluid pressure in the confined space by valve element portion illustrating in valve member, and (a) is valve
The confined space of core become maximum in the case of valve member sectional view, (b) is the structure in the valve member possessing (a)
Observe the top view of valve seat from axle L direction in (max architecture in confined space).Fig. 5 be illustrate in valve member by valve element
The figure of the position of the Fluid pressure in the confined space in portion, (a) is that the confined space in valve element portion becomes the valve in the case of minimum
The sectional view of part, (b) is to observe from axle L direction in possessing the structure of valve member of (a) (minimal structure in confined space)
The top view of valve seat.
Fig. 6 is the figure of the action of the two-port valve that Fig. 1 is described, (a) is the longitudinal section of two-port valve, and (b) is to see from axle L direction
Examine the top view of the valve seat of (a), (c) is the amplification view (example 1 of the part being exaggerated (a)：Maximum in confined space
In structure, in confined space and the indoor Fluid pressure of the back pressure situation higher than the Fluid pressure in valve chamber).Fig. 7 is explanation
The figure of the action of the two-port valve of Fig. 1, (a) is the longitudinal section of two-port valve, and (b) is bowing of the valve seat from axle L direction observation (a)
View, (c) is the amplification view (example 2 of the part being exaggerated (a)：In confined space minimal structure, in confined space
And the indoor Fluid pressure of the back pressure situation higher than the Fluid pressure in valve chamber).Fig. 8 is the action of the two-port valve that Fig. 1 is described
Figure, (a) is the longitudinal section of two-port valve, (b) be from axle L direction observe (a) valve seat top view, (c) is to be exaggerated
Amplification view (the example 3 of the part of (a)：In confined space max architecture, the stream of in confined space and back pressure interior
The low situation of Fluid pressure in body pressure ratio valve chamber).Fig. 9 is the figure of the action of the two-port valve that Fig. 1 is described, (a) is two-port valve
Longitudinal section, (b) be from axle L direction observe (a) valve seat top view, (c) is the amplification of the part being exaggerated (a)
Sectional view (example 4：In confined space minimal structure, the Fluid pressure of in confined space and back pressure interior is than in valve chamber
The low situation of Fluid pressure).
In above-mentioned two-port valve 1, such as because deformation caused by the form tolerance of valve member 30, temperature change etc. is various
Will be because, the contact area between the lower surface 33a and valve seat 22a of valve member 30 can produce deviation or become unstable, thus
The balance putting on power produced by the Fluid pressure of valve member 30 changes.Therefore, by because of the lower surface 33a of valve member 30
The deviation of the contact area and valve seat 22a between and confined space G become maximum situation and become minimum situation and make
For worst example, by setting the produced power pushing this valve member 30 of helical spring 63, even if so that in these assignments
In the case of example, valve member 30 also will not float from valve seat 22a, thus, it is possible to, in the whole examples supposing, making valve portion
Part 30 floats from valve seat 22a.
For example, as shown in Fig. 4 (a), in the case that valve member 30 is pushed on valve seat 22a by helical spring 63 it is believed that
Because of form tolerance, the outer peripheral edge 33a1 of the lower surface 33a in valve element portion 33 can be connected to valve seat 22a, and inner peripheral 33a2 meeting
Leave from valve seat 22a.In this case, the lower surface 33a in valve element portion 33 is applied with the Fluid pressure in confined space G.?
That is, such as shown in Fig. 4 (b), the vertical view area S1 of the position by the Fluid pressure in confined space G in valve member 30 becomes
For the area (oblique line portion) in the outer peripheral edge 33a1 of the lower surface 33a in valve element portion 33.Hereinafter, this structure is referred to as " confined air
Between max architecture ".
And, as shown in Fig. 5 (a), in the case that valve member 30 is pushed on valve seat 22a by helical spring 63 it is believed that
Because of form tolerance, the inner peripheral 33a2 of the lower surface 33a in valve element portion 33 can be connected to valve seat 22a, and outer peripheral edge 33a1 meeting
Leave from valve seat 22a.In this case, the lower surface 33a in valve element portion 33 is applied with the Fluid pressure in valve chamber B.Namely
Say, such as shown in Fig. 5 (b), the vertical view area S2 of the position by the Fluid pressure in confined space G in valve member 30 becomes valve
Area (oblique line portion) in the inner peripheral 33a2 of the lower surface 33a of core 33.Hereinafter, by this structure, referred to as " confined space is
Little structure ".
And, for respectively in above-mentioned confined space max architecture and confined space minimal structure, in confined space G
And the situation higher than the Fluid pressure in valve chamber B of the Fluid pressure in back pressure chamber H and this four examples of low situation, below
Represent an example of the power to valve member 30 effect.
In the following description, the vertical view area SH1 of the big footpath column part 31b of the cylindrical portion 31 of valve member 30 is set to
380 square millimeters (that is, the diameter D1 of big footpath column part 31b being set to 22mm), by the vertical view area of path column part 31a
SH2 is set to 254.3 square millimeters (that is, the diameter D2 of path column part 31a being set to 18mm), by confined space max architecture
When above-mentioned vertical view area S1 (that is, the area in the outer peripheral edge 33a1 of lower surface 33a) be set to 385 square millimeters, by confined air
Between minimal structure when above-mentioned vertical view area S2 (that is, the area in the inner peripheral 33a2 of lower surface 33a) be set to 250 squares of millis
Rice.
And, by situation higher than the Fluid pressure in valve chamber B for the Fluid pressure in confined space G and in back pressure chamber H
Under the pressure differential Δ P1 of above-mentioned Fluid pressure be set to 3.0MPa, by the Fluid pressure ratio in confined space G and in back pressure chamber H
The pressure differential Δ P2 of the above-mentioned Fluid pressure in the case that the Fluid pressure in valve chamber B is low is set to -3.0MPa.
It is by by the fluid in confined space G by power F1 that the Fluid pressure in confined space G acts on to valve member 30
Pressure differential (above-mentioned pressure differential Δ P1 or Δ P2) between Fluid pressure in pressure and valve chamber B is multiplied by being subject in valve member 30
Obtained from the vertical view area (above-mentioned vertical view area S1 or S2) of the position of the Fluid pressure in confined space G.By back pressure
Power F2 that Fluid pressure in the H of room acts on to valve member 30 is by by the fluid in the Fluid pressure in back pressure chamber H and valve chamber B
Pressure differential (above-mentioned pressure differential Δ P1 or Δ P2) between pressure be multiplied by valve member 30 by the fluid pressure in back pressure chamber H
Obtained from the vertical view area (above-mentioned vertical view area SH1 or SH2) of the position of power.And, below will push valve towards valve seat
The direction of part 30 is just set to.
(example 1：In confined space max architecture, the Fluid pressure in confined space G and in back pressure chamber H is than valve chamber B
The high situation of interior Fluid pressure)
As shown in Fig. 6 (a), (b), the Fluid pressure in confined space G and in back pressure chamber H is than the fluid in valve chamber B
In the case of pressure height, sealing ring 38 is pushed on the cylindrical portion step surface 31c of the cylindrical portion 31 of valve member 30.Therefore, big
The position of footpath column part 31b (that is, overlooking area SH1) applies the Fluid pressure in back pressure chamber H.Therefore, by confined space G
Fluid pressure power F1 that valve member 30 is acted on become：
F1=(- Δ P1) × S1=-1155 [N] ... (2-1),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 30：
F2=Δ P1 × SH1=1140 [N] ... (2-2).
Therefore, by above-mentioned formula, following power is acted on to valve member 30：
F=F1+F2=-15 [N],
That is, to make valve member 30 act on the power of 15 [N] in the way of valve seat 22a floats.In this case,
Need to push valve member 30 with the power at least over 15 [N] towards valve seat 22a using helical spring 63.
(example 2：In confined space minimal structure, the Fluid pressure in confined space G and in back pressure chamber H is than valve chamber B
The high situation of interior Fluid pressure)
As shown in Fig. 7 (a), (b), in example 2, also identical with example 1, (that is, overlook face in big footpath column part 31b
Long-pending SH1) position apply back pressure chamber H in Fluid pressure.Therefore, by the Fluid pressure in confined space G, valve member 30 is made
Power F1 becomes：
F1=(- Δ P1) × S2=-750 [N] ... (2-3),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 30：
F2=Δ P1 × SH1=1140 [N] ... (2-4).
Therefore, by above-mentioned formula, following power is acted on to valve member 30：
F=F1+F2=390 [N],
That is, acting on the power of 390 [N] in the way of valve member 30 is pushed on valve seat 22a.In this situation
Under, even if not utilizing helical spring 63 to push valve member 30 towards valve seat 22a, valve member 30 also will not float from valve seat 22a
Rise.
(example 3：In confined space max architecture, the Fluid pressure in confined space G and in back pressure chamber H is than valve chamber B
The low situation of interior Fluid pressure)
As shown in Fig. 8 (a), (b), the Fluid pressure in confined space G and in back pressure chamber H is than the fluid in valve chamber B
In the case that pressure is low, sealing ring 38 is pushed on the support step surface 15c of the valve member support 15 of valve body 10.Cause
This, apply the Fluid pressure in back pressure chamber H in the position of path column part 31a (that is, overlooking area SH2).Therefore, by airtight
Power F1 that Fluid pressure in the G of space acts on to valve member 30 becomes：
F1=(- Δ P2) × S1=1155 [N] ... (2-5),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 30：
F2=Δ P2 × SH2=-763 [N] ... (2-6).
Therefore, by above-mentioned formula, following power is acted on to valve member 30：
F=F1+F2=392 [N]
That is, acting on the power of 392 [N] in the way of valve member 30 is pushed on valve seat 22a.In this situation
Under, even if not utilizing helical spring 63 to push valve member 30 towards valve seat 22a, valve member 30 also will not float from valve seat 22a
Rise.
(example 4：In confined space minimal structure, the Fluid pressure in confined space G and in back pressure chamber H is than valve chamber B
The low situation of interior Fluid pressure)
As shown in Fig. 9 (a), (b), in example 4, also identical with example 3, (that is, overlook face in path column part 31a
Long-pending SH2) position apply back pressure chamber H in Fluid pressure.Therefore, by the Fluid pressure in confined space G, valve member 30 is made
Power F1 becomes：
F1=(- Δ P2) × S2=750 [N] ... (2-7),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 30：
F2=Δ P2 × SH2=-763 [N] ... (2-8).
Therefore, by above-mentioned formula, following power is acted on to valve member 30：
F=F1+F2=-13 [N],
That is, to make valve member 30 act on the power of 13 [N] in the way of valve seat 22a floats.In this case,
Need to push valve member 30 with the power at least over 13 [N] towards valve seat 22a using helical spring 63.
In above-mentioned example 1～4, in example 1, the power that valve member 30 floats from valve seat 22a becomes maximum.Therefore,
In order in example 1～4, either case valve member 30 floats all without from valve seat 22a, in the example 1 as worst example
In, so that valve member 30 is not floated from valve seat 22a.That is, helical spring 63 is produced pushing away towards valve seat 22a
Power FS of pressure valve part 30 is set as at least over the power making valve member 30 float in example 1 that is, 15 [N].And,
By the relation between the Fluid pressure of switch back pressure room H and the Fluid pressure of valve chamber B, to make in valve member 30 by back pressure
The vertical view area of the Fluid pressure of room H changes.Specifically, the Fluid pressure of valve chamber B is higher than the Fluid pressure of back pressure chamber H
When above-mentioned vertical view area be SH2, the above-mentioned vertical view area when Fluid pressure of valve chamber B is lower than the Fluid pressure of back pressure chamber H is
SH1, SH2 are less than SH1.Thus, this power set by helical spring 63 is less than conventional structure.
As described above, in two-port valve 1, the Fluid pressure in confined space G and in back pressure chamber H is than in valve chamber B
In the case of Fluid pressure height, sealing ring 38 is pushed on the cylindrical portion step surface 31c of the cylindrical portion 31 of valve member 30.Therefore,
Apply the Fluid pressure in back pressure chamber H in the position of big footpath column part 31b (that is, overlooking area SH1).And, in confined air
Between Fluid pressure in G and in back pressure chamber H lower than the Fluid pressure in valve chamber B in the case of, sealing ring 38 is pushed on valve
The support step surface 15c of the valve member support 15 of main body 10.Therefore, (that is, overlook area in path column part 31a
SH2 position) applies the Fluid pressure in back pressure chamber H.
That is, two-port valve 1 is configured to, the valve member when Fluid pressure of back pressure chamber H is lower than the Fluid pressure of valve chamber B
The vertical view area of the Fluid pressure by back pressure chamber H in 30 is SH2, the Fluid pressure of the back pressure chamber H Fluid pressure than valve chamber B
Above-mentioned vertical view area when high is SH1, and SH2 is less than SH1.And, between valve body 10 and valve member 30, it is provided with to them it
Between the sealing ring 38 of ring-type that sealed, and be configured to, when the Fluid pressure of back pressure chamber H is higher than the Fluid pressure of valve chamber B
Sealing ring 38 is pushed on valve member 30, and the sealing ring 38 when the Fluid pressure of back pressure chamber H is lower than the Fluid pressure of valve chamber B
It is pushed on valve body 10.
As described above, the two-port valve 1 of present embodiment possesses：It is provided with the valve body 10 of space Q in inner side；Have towards sky
Between Q plane valve seat 22a and the first valve port P1 and the second valve port P2 in this valve seat 22a opening seat portion 20；
Configured in the way of being slidingly and rotatably overlapped in valve seat 22a in the Q of space and to be switched and stop position by rotation
The the first valve port P1 accordingly determining and the valve member 30 of the connected relation of the second valve port P2；And push towards valve seat 22a
The helical spring 63 of valve member 30.And, valve member 30 has：The cylindrical portion of valve body 10 can be rotatably supported on around axle center
31；And be connected with one end of cylindrical portion 31 and be accordingly opened and closed the first valve port P1 and second with the stop position of valve member 30
The valve element portion 33 of valve port P2.By dividing space Q by valve member 30, and valve body 10 has the side being formed at cylindrical portion 31
And accommodate valve element portion 33 valve chamber B and be formed at cylindrical portion 31 another side back pressure chamber H.Valve member 30 has connection
One valve port P1 and the Jun Ya road 36 of the second valve port P2 and back pressure chamber H.Cylindrical portion 31 has：With end face towards back pressure chamber H side
The path column part 31a of formula configuration；The big footpath column part being coaxially connected with the other end of this path column part 31a
31b；And be formed between the outer peripheral face 31a1 of path column part 31a and the outer peripheral face 31b1 of big footpath column part 31b
Cylindrical portion step surface 31c.Valve body 10 has valve member support 15, and this valve member support 15 is provided with：For path cylindrical portion
Divide path hole portion 15a that 31a can rotatably be fitted together to；The large diameter hole portion being rotatably fitted together to for big footpath column part 31b
15b；And it is formed at the support platform between the inner peripheral surface 15a1 of path hole portion 15a and the inner peripheral surface 15b1 of large diameter hole portion 15b
Terrace 15c.And, in the outer peripheral face 31a1 by path column part 31a, cylindrical portion step surface 31c, large diameter hole portion 15b
In sealing space R that side face 15b1 and support step surface 15c impales, it is provided with the outer peripheral face to path column part 31a
The sealing ring 38 of the ring-type being sealed between the inner peripheral surface 15b1 of 31a1 and large diameter hole portion 15b.
More than, according to present embodiment, the cylindrical portion 31 that can rotatably be supported on valve body 10 around axle center has：With one
End face is towards the path column part 31a that configures of mode of back pressure chamber H；Coaxial with the other end of this path column part 31a
The big footpath column part 31b that ground is connected；And it is formed at outer peripheral face 31a1 and the big footpath column part of path column part 31a
Cylindrical portion step surface 31c between the outer peripheral face 31b1 of 31b.And, valve body 10 has valve member support 15, this valve member
Support 15 is provided with：The path column part 31a of cylindrical portion 31 is fitting for path hole portion 15a that can rotate；By cylindrical portion
31 big footpath column part 31b is fitting for the large diameter hole portion 15b that can rotate；And it is formed at the inner peripheral surface of path hole portion 15a
Support step surface 15c between the inner peripheral surface 15b1 of 15a1 and large diameter hole portion 15b.And, in the path circle by cylindrical portion 31
The outer peripheral face 31a1 of post part 31a, cylindrical portion step surface 31c, the large diameter hole portion 15b of the valve member support 15 of valve body 10
In sealing space R that inner peripheral surface 15b1 and support step surface 15c impales, it is provided with the outer peripheral face to path column part 31a
The sealing ring 38 of the ring-type being sealed between the inner peripheral surface 15b1 of 31a1 and large diameter hole portion 15b.Like this, in sealing ring 38
The position of cylindrical portion step surface 31c side be applied with Fluid pressure in valve chamber B, in the support step surface 15c of sealing ring 38
The position of side is applied with the Fluid pressure in back pressure chamber H.Therefore, the Fluid pressure in back pressure chamber H is than the fluid pressure in valve chamber B
In the case of power height, sealing ring 38 is pushed on by cylindrical portion step surface 31c by the Fluid pressure in back pressure chamber H, and in valve member
Apply fluid pressure back pressure chamber H in the position in the inner part of the external diameter than big footpath column part 31b in the case of overlooking in 30
Power.And, in the case that the Fluid pressure in back pressure chamber H is lower than the Fluid pressure in valve chamber B, by the fluid pressure in valve chamber B
Sealing ring 38 is pushed on support step surface 15c by power, and in valve member 30 overlook in the case of ratio path column part
The external diameter of 31a position in the inner part applies the Fluid pressure in back pressure chamber H.That is, the Fluid pressure ratio in back pressure chamber H
In the case that Fluid pressure in valve chamber B is low, it is allowed to from valve seat when being acted on to valve member 30 by the Fluid pressure in back pressure chamber H
During the power that 22a floats, due to being diminished by the area of the position of the Fluid pressure in back pressure chamber H in valve member 30, so energy
Enough reduce the power making valve member 30 float from valve seat 22a.Thereby, it is possible to reduce produced by helical spring 63 towards valve seat
22a pushes the power of valve member 30 such that it is able to valve member 30 is pushed on the power of valve seat 22a by suppression.
And, two-port valve 1 is configured to, in the valve member 30 when the Fluid pressure of back pressure chamber H is lower than the Fluid pressure of valve chamber B
The Fluid pressure by back pressure chamber H vertical view area be SH2, when the Fluid pressure of back pressure chamber H is higher than the Fluid pressure of valve chamber B
Vertical view area be SH1, SH2 is less than SH1.Like this, the Fluid pressure in back pressure chamber H is than the Fluid pressure in valve chamber B
In the case of low, when being allowed to valve member 30 effect from the power that valve seat 22a floats by the Fluid pressure in back pressure chamber H, by
Diminish in the area (that is, overlooking area) of the position by the Fluid pressure in back pressure chamber H in valve member 30, it is possible to contracting
The little power making valve member 30 float from valve seat 22a.Thereby, it is possible to reduce produced by helical spring 63 towards valve seat 22a
Push the power of valve member 30 such that it is able to valve member 30 is pushed on the power of valve seat 22a by suppression.
And, between the valve body 10 in two-port valve 1 and valve member 30, it is provided with to the ring-type being sealed between them
Sealing ring 38.And be configured to, when the Fluid pressure of back pressure chamber H is higher than the Fluid pressure of valve chamber B, sealing ring 38 is pushed on
Valve member 30, and when the Fluid pressure of back pressure chamber H is lower than the Fluid pressure of valve chamber B, sealing ring 38 is pushed on valve body
10.Like this, for for the sealing ring 38 of the ring-type being sealed between valve body 10 and valve member 30, in one portion
The face (position of support step surface 15c side) divided is applied with the Fluid pressure of back pressure chamber H, and the face in another part
(position of cylindrical portion step surface 31c side) is applied with the Fluid pressure of valve chamber B.And, if when the Fluid pressure of back pressure chamber H compares valve
When the Fluid pressure of room B is high, sealing ring 38 is pushed on valve member 30, then in the vertical view area in the face of a part for sealing ring 38
The Fluid pressure of the back pressure chamber H applying also puts on valve member 30.And if, the stream than valve chamber B for the Fluid pressure as back pressure chamber H
When body pressure is low, sealing ring 38 is pushed on valve body 10, then the valve chamber B's applying in the face of the another part of sealing ring 38
Fluid pressure also puts on valve body 10.That is it is configured to, the Fluid pressure of back pressure chamber H is lower than the Fluid pressure of valve chamber B
When valve member 30 in the vertical view area of the Fluid pressure by back pressure chamber H (that is, direct or through seal member for SH2
And indirectly it is subject to the vertical view area of power), the above-mentioned vertical view face when Fluid pressure of back pressure chamber H is higher than the Fluid pressure of valve chamber B
Amass as SH1, SH2 is less than SH1.So, in the case that the Fluid pressure in back pressure chamber H is lower than the Fluid pressure in valve chamber B, when
By the Fluid pressure in back pressure chamber H, valve member 30 is acted on and be allowed to when the power that valve seat 22a floats, due in valve member 30
Area (that is, overlook area) by the position of the Fluid pressure in back pressure chamber H diminishes, it is possible to reduce make valve member 30 from
The power that valve seat 22a floats.Thereby, it is possible to reduce, helical spring 63 is produced to push valve member 30 towards valve seat 22a
Power is such that it is able to valve member 30 is pushed on the power of valve seat 22a by suppression.
(second embodiment)
Hereinafter, for the flow channel switching valve of the second embodiment of the rotary valve device as the present invention, reference Figure 10,
Figure 11 illustrates to structure, and with reference to Figure 12～Figure 17, action is illustrated.
Figure 10 is the longitudinal section of the flow channel switching valve of second embodiment of the present invention.Figure 11 is the X-X along Figure 10
The sectional view of line, (a) represents that valve member is in the state of the first stop position, and (b) represents that valve member is in the second stop position
State.Additionally, the concept of " upper and lower " in the following description and corresponding up and down in Figure 11, the relative position of each part of expression
Put relation, do not indicate that absolute position relationship.
The flow channel switching valve (each in figure is represented with symbol 1A) of second embodiment is e.g. disposed in the flowing side of fluid
To the loop changing and for switching the four-way switching valve of the flow direction of fluid etc..
As shown in Figure 10, Figure 11, the flow channel switching valve 1A of present embodiment has valve body 10, seat portion 20A, valve member
30A, sealing ring 38, rotation axle portion 40, rotary driving part 50 and helical spring 63.The flow channel switching valve 1A of present embodiment removes
There is seat portion 20A and valve member 30A to replace the seat portion 20 in the two-port valve 1 of above-mentioned first embodiment and valve
Beyond part 30, it is the two-port valve identical structure with above-mentioned first embodiment.Thus, in the following description, to
First embodiment identical structure mark identical symbol simultaneously omits the description.
Seat portion 20A has：By block valve body 10 Part I 11 in figure below the other end in the way of with
The seat portion main body 21 that this Part I 11 is integrally provided；And be regularly overlapped in seat portion main body 21 towards space Q
Thin-plate member 22 in the plane of side.
And, seat portion 20A is provided with many as arranged in the way of insertion seat portion main body 21 and thin-plate member 22
First fixing port E1 of individual valve port, the second fixing port E2, the first switching port C1 and the second switching port C2.In present embodiment
In, in the case of overlooking from the direction orthogonal with valve seat 22a, the first fixing port E1 is configured to the axle L with circular through hole 13
Overlap, the second fixing port E2, the first switching port C1 and the second switching port C2 configure and (include on the circumference centered on axle L
Probably circumferentially).The seat portion main body 21 of seat portion 20A and thin-plate member 22 are and above-mentioned in addition to the mouth opening up
One embodiment identical structure.
Valve member 30A is provided integrally with：Cylindrical portion 31；And end (that is, the cylinder below the in figure of cylindrical portion 31
The one end in portion 31) valve element portion 33A.Valve member 30A is contained in the space Q in valve body 10.Cylindrical portion 31 is and above-mentioned
One embodiment identical structure.That is, the valve member support of the cylindrical portion 31 of present embodiment and valve body 10
15 are and the above-mentioned first embodiment identical structure shown in Fig. 2.
Valve element portion 33A is formed as the radially projecting rounded shape of vertical view along cylindrical portion 31, and configuration is in valve body 10
In the 11a of side space.In the present embodiment, valve element portion 33A and one end of cylindrical portion 31 are integratedly conjointly arranged.Certainly, remove
Beyond this structure, valve element portion 33A mutually can also be separately formed with cylindrical portion 31, and via connection member etc. and cylindrical portion 31
One end conjointly arrange.The lower surface 33a of valve element portion 33A is formed as plane, slidingly and rotatably can closely be overlapped in valve
The valve seat 22a of portions 20A.It is provided with the airtight connection of extension inside to this valve element portion 33A in the lower surface 33a of valve element portion 33A
Road 34A and open communication road 35.
Airtight access 34A by between valve seat 22a formed confined space G1 in the way of from middle body radially
Extend the lower surface 33a located at valve element portion 33A for the ground.In the present embodiment, in the case of the vertical view that axle L direction is observed, close
Close access 34A and be formed as banding (include substantially banding), it has in the outside of cylindrical portion 31 and extends facing one direction
Extension 340.
Open communication road 35 is set to, and forms, in the lower surface 33a of valve element portion 33A, the substantially C word surrounding airtight access 34A
The space G2 of shape.In valve element portion 33A, it is provided with the inside and outside connecting hole 33b connecting open communication road 35.
And, in valve member 30A, it is communicated with the rotation axle portion installing hole 32 of cylindrical portion 31 and airtight access 34A
Jun Ya road 36.Using this Jun Ya road 36, by rotating axle portion installing hole 32 and connecting airtight access 34A's with by way of connecting
Confined space G1 and back pressure chamber H.
When being in the first stop position shown in Figure 11 (a) as valve member 30A, by the confined air of airtight access 34A
Between G1 connect the first fixing port E1 and the first switching port C1 in the way of connecting, and make the second fixing port E2 and the second switching port
C2 exposes in the space G2 on open communication road 35 and connects these mouths in the way of connecting.And if, being allowed to from Figure 11 (a)
One stop position rotates the second stop position shown in Figure 11 (b), then valve member 30A is by being formed by airtight access 34A
Confined space G1 connect the first fixing port E1 and the second switching port C2 in the way of connecting, and make the second fixing port E2 and
One switching port C1 exposes in the space G2 on open communication road 35 and connects these mouths in the way of connecting.
In valve body 10 and valve member 30A, it is provided with restriction valve member 30A more than the first stop position and the second stop position
A pair of the rotary position-limit mechanism (not shown) put and rotate.Or or following structure：Setting is by detection valve member 30A
The composition such as the sensor of the anglec of rotation etc. test section, and the anglec of rotation based on the valve member 30A being detected by this test section
Degree etc., controls rotary driving part 50 described later, so that valve member 30A stops at the first stop position and the second stop position.
Thus, valve member 30A stops in the second stop position along in figure counterclockwise rotates from the first stop position, and from the
Two stop positions are rotated clockwise along in figure and stop in the first stop position.
Next, one example of the action of the flow channel switching valve 1A to present embodiment is said with reference to Figure 12～Figure 17
Bright.
Figure 12 is scheming of the position of Fluid pressure in the confined space by valve element portion illustrating in valve member, and (a) is
The confined space in valve element portion become maximum in the case of valve member sectional view, (b) is the structure in the valve member possessing (a)
Observe the top view of valve seat from axle L direction in (max architecture in confined space).Figure 13 be illustrate in valve member by valve
The figure of the position of the Fluid pressure in the confined space of core, (a) be valve element portion confined space become minimum in the case of
The sectional view of valve member, (b) is to see from axle L direction in possessing the structure of valve member of (a) (minimal structure in confined space)
Examine the top view of valve seat.
Figure 14 is the figure of the action of the flow channel switching valve that Figure 10 is described, (a) is the longitudinal section of flow channel switching valve, and (b) is
Observe the top view of the valve seat of (a) from axle L direction, (c) is the amplification view (example 1 of the part being exaggerated (a)：?
In confined space max architecture, in confined space and the indoor Fluid pressure of back pressure feelings higher than the Fluid pressure in valve chamber
Condition).Figure 15 is the figure of the action of the flow channel switching valve that Figure 10 is described, (a) is the longitudinal section of flow channel switching valve, and (b) is from axle L
The top view of the valve seat of (a) is observed in direction, and (c) is the amplification view (example 2 of the part being exaggerated (a)：In confined air
Between in minimal structure, in confined space and the indoor Fluid pressure of the back pressure situation higher than the Fluid pressure in valve chamber).Figure 16
It is the figure of the action of the flow channel switching valve that Figure 10 is described, (a) is the longitudinal section of flow channel switching valve, (b) is to observe from axle L direction
A the top view of the valve seat of (), (c) is the amplification view (example 3 of the part being exaggerated (a)：In the maximum knot of confined space
In structure, in confined space and the indoor Fluid pressure of the back pressure situation lower than the Fluid pressure in valve chamber).Figure 17 is explanatory diagram
The figure of the action of 10 flow channel switching valve, (a) is the longitudinal section of flow channel switching valve, and (b) is the valve observing (a) from axle L direction
The top view of seat surface, (c) is the amplification view (example 4 of the part being exaggerated (a)：In confined space minimal structure, close
Close in space and situation that Fluid pressure that back pressure is indoor is lower than the Fluid pressure in valve chamber).
In above-mentioned flow channel switching valve 1A, such as because of the deformation caused by the form tolerance of valve member 30A, temperature change
Etc. various will be because, the contact area between the lower surface 33a and valve seat 22a of valve member 30A can produce deviation or become unstable
Fixed, thus the balance of power produced by Fluid pressure putting on valve member 30A changes.Therefore, by because valve member 30A's
The deviation of the contact area between lower surface 33a and valve seat 22a and confined space G1 become maximum situation and become
Little situation as worst example, by setting the produced power pushing this valve member 30A of helical spring 63, even if so as
In the case of these worst examples, valve member 30A also will not float from valve seat 22a, thus, it is possible in the whole examples supposing
In, valve member 30 will not be made to float from valve seat 22a.
For example, as shown in Figure 12 (a), in the case that valve member 30A is pushed on valve seat 22a by helical spring 63, recognize
It is because of form tolerance, the outer peripheral edge 33a3 of the part of the airtight access 34A of encirclement in the lower surface 33a of valve element portion 33A can support
It is connected to valve seat 22a, and the inner peripheral 33a4 of this part can leave from valve seat 22a.In this case, to valve element portion 33A
Lower surface 33a this part apply confined space G1 in Fluid pressure.That is, as shown in Figure 12 (b), valve member
The vertical view area S1 of the position by the Fluid pressure in confined space G1 in 30A becomes in the lower surface 33a of valve element portion 33A
The outer peripheral edge 33a3 of part of the airtight access 34A of encirclement in area (oblique line portion).Hereinafter, this structure is referred to as " close
Close space max architecture ".
And, as shown in Figure 13 (a), in the case that valve member 30A is pushed on valve seat 22a by helical spring 63, recognize
It is because of form tolerance, the inner peripheral 33a4 of the part of the airtight access 34A of encirclement in the lower surface 33a of valve element portion 33A can support
It is connected to valve seat 22a, and the outer peripheral edge 33a3 of this part can leave from valve seat 22a.In this case, to valve element portion 33A
Lower surface 33a in this part apply valve chamber B in Fluid pressure.That is, as shown in Figure 13 (b), in valve member 30A
The vertical view area S2 of the position by the Fluid pressure in confined space G1 become wrapping in the lower surface 33a of valve element portion 33A
Area (oblique line portion) in the inner peripheral 33a4 of the part enclosing airtight access 34A.Hereinafter, this structure is referred to as " confined air
Between minimal structure ".
And, for respectively in above-mentioned confined space max architecture and confined space minimal structure, confined space G1
Fluid pressure in the interior and back pressure chamber H situation higher than the Fluid pressure in valve chamber B and this four examples of low situation, with
A lower example representing the power to valve member 30A effect.
In the following description, the vertical view area SH1 of the big footpath column part 31b of the cylindrical portion 31 of valve member 30A is set
For 380 square millimeters (that is, the diameter D1 of big footpath column part 31b being set to 22mm), by the vertical view face of path column part 31a
Long-pending SH2 is set to 254.3 square millimeters (that is, the diameter D2 of path column part 31a being set to 18mm), by maximum for confined space knot
Above-mentioned vertical view area S1 (that is, the area in the outer peripheral edge 33a3 of lower surface 33a) during structure is set to 400 square millimeters, will be airtight
Above-mentioned vertical view area S2 (that is, the area in the inner peripheral 33a4 of lower surface 33a) during the minimal structure of space is set to 252 squares of millis
Rice.
And, by situation higher than the Fluid pressure in valve chamber B for the Fluid pressure in confined space G1 and in back pressure chamber H
Under the pressure differential Δ P1 of above-mentioned Fluid pressure be set to 3.0MPa, by the Fluid pressure in confined space G1 and in back pressure chamber H
The pressure differential Δ P2 of the above-mentioned Fluid pressure in the case of lower than the Fluid pressure in valve chamber B is set to -3.0MPa.
It is by by the stream in confined space G1 by power F1 that the Fluid pressure in confined space G1 acts on to valve member 30A
Pressure differential (above-mentioned pressure differential Δ P1 or Δ P2) between Fluid pressure in body pressure and valve chamber B is multiplied by valve member 30A
The vertical view area (above-mentioned vertical view area S1 or S2) of the position by the Fluid pressure in confined space G1 obtained from.By
Power F2 that Fluid pressure in back pressure chamber H acts on to valve member 30A is by by the Fluid pressure in back pressure chamber H and valve chamber B
Fluid pressure between pressure differential (above-mentioned pressure differential Δ P1 or Δ P2) be multiplied by valve member 30A by back pressure chamber H
The vertical view area (above-mentioned vertical view area SH1 or SH2) of the position of Fluid pressure obtained from.And, below will be towards valve seat
The direction that face 22a pushes valve member 30A is just set to.
(example 1：In confined space max architecture, the Fluid pressure in confined space G1 and in back pressure chamber H compares valve chamber
The high situation of Fluid pressure in B)
As shown in Figure 14 (a), (b), the Fluid pressure in confined space G1 and in back pressure chamber H is than the stream in valve chamber B
In the case of body pressure height, sealing ring 38 is pushed on the cylindrical portion step surface 31c of the cylindrical portion 31 of valve member 30A.Therefore, exist
The position of big footpath column part 31b (that is, overlooking area SH1) applies the Fluid pressure in back pressure chamber H.Therefore, by confined space
Power F1 that Fluid pressure in G1 acts on to valve member 30A becomes：
F1=(- Δ P1) × S1=-1200 [N] ... (3-1),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 30A：
F2=Δ P1 × SH1=1140 [N] ... (3-2).
Therefore, by above-mentioned formula, following power is acted on to valve member 30A：
F=F1+F2=-60 [N],
That is, to make valve member 30A act on the power of 60 [N] in the way of valve seat 22a floats.In this situation
Under, need to push valve member 30A with the power at least over 60 [N] towards valve seat 22a using helical spring 63.
(example 2：In confined space minimal structure, the Fluid pressure in confined space G1 and in back pressure chamber H compares valve chamber
The high situation of Fluid pressure in B)
As shown in Figure 15 (a), (b), in example 2, also identical with example 1, (that is, overlook face in big footpath column part 31b
Long-pending SH1) position apply back pressure chamber H in Fluid pressure.Therefore, by the Fluid pressure in confined space G1 to valve member 30A
Power F1 of effect becomes：
F1=(- Δ P1) × S2=-756 [N] ... (3-3),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 30A：
F2=Δ P1 × SH1=1140 [N] ... (3-4).
Therefore, by above-mentioned formula, following power is acted on to valve member 30A：
F=F1+F2=384 [N],
That is, acting on the power of 384 [N] in the way of valve member 30A is pushed on valve seat 22a.In this situation
Under, even if not utilizing helical spring 63 to push valve member 30A towards valve seat 22a, valve member 30A also will not be from valve seat 22a
Float.
(example 3：In confined space max architecture, the Fluid pressure in confined space G1 and in back pressure chamber H compares valve chamber
The low situation of Fluid pressure in B)
As shown in Figure 16 (a), (b), the Fluid pressure in confined space G1 and in back pressure chamber H is than the stream in valve chamber B
In the case that body pressure is low, sealing ring 38 is pushed on the support step surface 15c of the valve member support 15 of valve body 10.Cause
This, apply the Fluid pressure in back pressure chamber H in the position of path column part 31a (that is, overlooking area SH2).Therefore, by airtight
Power F1 that Fluid pressure in the G1 of space acts on to valve member 30A becomes：
F1=(- Δ P2) × S1=1200 [N] ... (3-5),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 30A：
F2=Δ P2 × SH2=-763 [N] ... (3-6).
Therefore, by above-mentioned formula, following power is acted on to valve member 30A：
F=F1+F2=437 [N],
That is, acting on the power of 437 [N] in the way of valve member 30A is pushed on valve seat 22a.In this situation
Under, even if not utilizing helical spring 63 to push valve member 30A towards valve seat 22a, valve member 30A also will not be from valve seat 22a
Float.
(example 4：In confined space minimal structure, the Fluid pressure in confined space G1 and in back pressure chamber H compares valve chamber
The low situation of Fluid pressure in B)
As shown in Figure 17 (a), (b), in example 4, also identical with example 3, (that is, overlook face in path column part 31a
Long-pending SH2) position apply back pressure chamber H in Fluid pressure.Therefore, by the Fluid pressure in confined space G1 to valve member 30A
Power F1 of effect becomes：
F1=(- Δ P2) × S2=756 [N] ... (3-7),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 30A：
F2=Δ P2 × SH2=-763 [N] ... (3-8).
Therefore, by above-mentioned formula, following power is acted on to valve member 30A：
F=F1+F2=-7 [N],
That is, to make valve member 30A act on the power of 7 [N] in the way of valve seat 22a floats.In this case,
Need to push valve member 30A with the power at least over 7 [N] towards valve seat 22a using helical spring 63.
In above-mentioned example 1～4, in example 1, the power that valve member 30A floats from valve seat 22a becomes maximum.Therefore,
In order in example 1～4, either case valve member 30A floats all without from valve seat 22a, in the example as worst example
In 1, valve member 30A is made not float from valve seat 22a.That is, towards valve seat 22a produced by helical spring 63
Power FS pushing valve member 30A is set as at least over the power making valve member 30A float in example 1 that is, 60 [N].
For above-mentioned flow channel switching valve 1A, as conventional structure, path cylinder be not set in cylindrical portion 31
Part 31a and big footpath column part 31b and throughout the situation being axially uniform diameter, (that is, above-mentioned SH2=SH1=380 puts down
The situation of square millimeter) under, if becoming the state of above-mentioned example 4, by the Fluid pressure in confined space G1, valve member 30A is made
Power F1 becomes：
F1=(- Δ P2) × S2=756 [N] ... (3-9),
Become by power F2 that the Fluid pressure in back pressure chamber H acts on to valve member 30A：
F2=Δ P2 × SH2=-1140 [N] ... (3-10).
Therefore, by above-mentioned formula (23), (24), following power is acted on to valve member 30A：
F=F1+F2=-384 [N]
That is, to make valve member 30A act on the power of 384 [N] in the way of valve seat 22a floats.In this situation
Under, need to push valve member 30A with the power at least over 384 [N] towards valve seat 22a using helical spring 63, thus this thing
Example 4 becomes worst example.According to this situation, in the present embodiment, by the Fluid pressure of switch back pressure room H with valve chamber B's
Relation between Fluid pressure, to make the vertical view area of the Fluid pressure by back pressure chamber H in valve member 30A change.
Specifically, the above-mentioned vertical view area when Fluid pressure of valve chamber B is higher than the Fluid pressure of back pressure chamber H is SH2, the stream of valve chamber B
Above-mentioned vertical view area when the Fluid pressure of body pressure ratio back pressure chamber H is low is SH1, and SH2 is less than SH1.Thus, helical spring 63 institute
The power setting is less than conventional structure.
As described above, in flow channel switching valve 1A, the Fluid pressure in confined space G1 and in back pressure chamber H compares valve chamber
In the case of Fluid pressure height in B, sealing ring 38 is pushed on the cylindrical portion step surface 31c of the cylindrical portion 31 of valve member 30A.
Therefore, apply the Fluid pressure in back pressure chamber H in the position of big footpath column part 31b (that is, overlooking area SH1).And, close
Close Fluid pressure in the G1 of space and in back pressure chamber H lower than the Fluid pressure in valve chamber B in the case of, sealing ring 38 is pushed
Support step surface 15c in the valve member support 15 of valve body 10.Therefore, (that is, overlook face in path column part 31a
Long-pending SH2) position apply back pressure chamber H in Fluid pressure.
That is, flow channel switching valve 1A is configured to, when the Fluid pressure of back pressure chamber H is lower than the Fluid pressure of valve chamber B
The vertical view area of the Fluid pressure by back pressure chamber H in valve member 30A is SH2, and the Fluid pressure of back pressure chamber H is than valve chamber B's
Above-mentioned vertical view area when Fluid pressure is high is SH1, and SH2 is less than SH1.And, between valve body 10 and valve member 30A, if
There is the sealing ring 38 to the ring-type being sealed between them, and be configured to, when the stream than valve chamber B for the Fluid pressure of back pressure chamber H
When body pressure is high, sealing ring 38 is pushed on valve member 30A, and the Fluid pressure than valve chamber B for the Fluid pressure as back pressure chamber H
When low, sealing ring 38 is pushed on valve body 10.
As described above, the flow channel switching valve 1A of present embodiment possesses：It is provided with the valve body 10 of space Q in inner side；Have
The plane valve seat 22a of space-oriented Q, the first fixing port E1 in this valve seat 22a opening, the second fixing port E2,
One switching port C1 and seat portion 20A of the second switching port C2；Joined in the way of being slidingly and rotatably overlapped in valve seat 22a
Put in the Q of space and to be switched by rotation the first fixing port E1 accordingly determining with stop position, the second fixing port E2,
The valve member 30A of the connected relation of the first switching port C1 and the second switching port C2；And push valve member towards valve seat 22a
The helical spring 63 of 30A.And, valve member 30A has：The cylindrical portion 31 of valve body 10 can be rotatably supported on around axle center；
And be connected with one end of cylindrical portion 31 and be provided with the valve element portion 33A of airtight access 34A, this airtight access 34A with valve
Form confined space G1 between seat surface 22a and accordingly connected with the stop position of valve member 30A by this confined space G1
The first fixing port E1, the second fixing port E2, the first switching port C1 and the second switching port C2 that drift combines surely.By by valve portion
Part 30A divide space Q, and valve body 10 have the side being formed at cylindrical portion 31 and accommodate valve element portion 33A valve chamber B and
It is formed at the back pressure chamber H of the another side of cylindrical portion 31.Valve member 30A has the equal of connection airtight access 34A and back pressure chamber H
Pressure road 36.Cylindrical portion 31 has：By end face towards the path column part 31a configuring in the way of back pressure chamber H；With this path circle
The big footpath column part 31b that the other end of post part 31a is coaxially connected；And it is formed at the outer of path column part 31a
Cylindrical portion step surface 31c between the outer peripheral face 31b1 of side face 31a1 and big footpath column part 31b.Valve body 10 has valve member
Support 15, this valve member support 15 is provided with：Path column part 31a is fitting for path hole portion 15a that can rotate；Will
Big footpath column part 31b is fitting for the large diameter hole portion 15b that can rotate；And it is formed at the inner peripheral surface 15a1 of path hole portion 15a
Support step surface 15c and the inner peripheral surface 15b1 of large diameter hole portion 15b between.And, in the periphery by path column part 31a
The sealing that face 31a1, cylindrical portion step surface 31c, the inner peripheral surface 15b1 of large diameter hole portion 15b and support step surface 15c impale is empty
Between in R, be provided with and seal between the outer peripheral face 31a1 to path column part 31a and the inner peripheral surface 15b1 of large diameter hole portion 15b
Ring-type sealing ring 38.
More than, according to present embodiment, the cylindrical portion 31 that can rotatably be supported on valve body 10 around axle center has：With one
End face is towards the path column part 31a that configures of mode of back pressure chamber H；Coaxial with the other end of this path column part 31a
The big footpath column part 31b that ground is connected；And it is formed at outer peripheral face 31a1 and the big footpath column part of path column part 31a
Cylindrical portion step surface 31c between the outer peripheral face 31b1 of 31b.And, valve body 10 has valve member support 15, this valve member
Support 15 is provided with：The path column part 31a of cylindrical portion 31 is fitting for path hole portion 15a that can rotate；By cylindrical portion
31 big footpath column part 31b is fitting for the large diameter hole portion 15b that can rotate；And it is formed at the inner peripheral surface of path hole portion 15a
Support step surface 15c between the inner peripheral surface 15b1 of 15a1 and large diameter hole portion 15b.And, in the path circle by cylindrical portion 31
The outer peripheral face 31a1 of post part 31a, cylindrical portion step surface 31c, the large diameter hole portion 15b of the valve member support 15 of valve body 10
In sealing space R that inner peripheral surface 15b1 and support step surface 15c impales, it is provided with the outer peripheral face to path column part 31a
The sealing ring 38 of the ring-type being sealed between the inner peripheral surface 15b1 of 31a1 and large diameter hole portion 15b.Like this, in sealing ring 38
The position of cylindrical portion step surface 31c side be applied with Fluid pressure in valve chamber B, in the support step surface 15c of sealing ring 38
The position of side is applied with the Fluid pressure in back pressure chamber H.Therefore, the Fluid pressure in back pressure chamber H is than the fluid pressure in valve chamber B
In the case of power height, sealing ring 38 is pushed on by cylindrical portion step surface 31c by the Fluid pressure in back pressure chamber H, and in valve member
Apply fluid pressure back pressure chamber H in the position in the inner part of the external diameter than big footpath column part 31b in the case of overlooking in 30A
Power.And, in the case that the Fluid pressure in back pressure chamber H is lower than the Fluid pressure in valve chamber B, by the fluid pressure in valve chamber B
Sealing ring 38 is pushed on support step surface 15c by power, and in valve member 30A overlook in the case of ratio path column part
The external diameter of 31a position in the inner part applies the Fluid pressure in back pressure chamber H.That is, the Fluid pressure ratio in back pressure chamber H
In the case that Fluid pressure in valve chamber B is low, it is allowed to from valve seat when being acted on to valve member 30A by the Fluid pressure in back pressure chamber H
During the power that face 22a floats, due to being diminished by the area of the position of the Fluid pressure in back pressure chamber H in valve member 30A, so
The power making valve member 30A float can be reduced from valve seat 22a.Thereby, it is possible to reduce produced by helical spring 63 towards valve
Seat surface 22a pushes the power of valve member 30A such that it is able to valve member 30A is pushed on the power of valve seat 22a by suppression.
And, flow channel switching valve 1A is configured to, the valve portion when Fluid pressure of back pressure chamber H is lower than the Fluid pressure of valve chamber B
The vertical view area of the Fluid pressure by back pressure chamber H in part 30A is SH2, the Fluid pressure of the back pressure chamber H fluid than valve chamber B
Vertical view area when pressure is high is SH1, and SH2 is less than SH1.Like this, the Fluid pressure in back pressure chamber H is than in valve chamber B
In the case that Fluid pressure is low, it is allowed to float from valve seat 22a when being acted on to valve member 30A by the Fluid pressure in back pressure chamber H
Power when, the area (that is, overlook area) due to the position by the Fluid pressure in back pressure chamber H in valve member 30A diminishes,
It is possible to reducing the power making valve member 30A float from valve seat 22a.Thereby, it is possible to reduce court produced by helical spring 63
Push the power of valve member 30A to valve seat 22a such that it is able to valve member 30A is pushed on the power of valve seat 22a by suppression.
And, between the valve body 10 in flow channel switching valve 1A and valve member 30A, it is provided with to being sealed between them
The sealing ring 38 of ring-type.And be configured to, sealing ring 38 quilt when the Fluid pressure of back pressure chamber H is higher than the Fluid pressure of valve chamber B
It is pushed on valve member 30A, and sealing ring 38 is pushed on when the Fluid pressure of back pressure chamber H is lower than the Fluid pressure of valve chamber B
Valve body 10.Like this, for for the sealing ring 38 of the ring-type being sealed between valve body 10 and valve member 30A,
It is applied with the Fluid pressure of back pressure chamber H in part thereof of face (position of support step surface 15c side), and at other one
The face (position of cylindrical portion step surface 31c side) divided is applied with the Fluid pressure of valve chamber B.And, if the fluid pressure as back pressure chamber H
When power is higher than the Fluid pressure of valve chamber B, sealing ring 38 is pushed on valve member 30A, then bowing in the face of a part for sealing ring 38
The Fluid pressure of the back pressure chamber H that apparent area applies also puts on valve member 30A.And if, when the Fluid pressure of back pressure chamber H compares valve
When the Fluid pressure of room B is low, sealing ring 38 is pushed on valve body 10, then the face in the another part of sealing ring 38 applies
The Fluid pressure of valve chamber B also puts on valve body 10.That is it is configured to, the Fluid pressure of the back pressure chamber H fluid than valve chamber B
The vertical view area of the Fluid pressure by back pressure chamber H in valve member 30A when pressure is low be SH2 (that is, direct or through close
Seal part and be indirectly subject to the vertical view area of power), above-mentioned when the Fluid pressure of back pressure chamber H is higher than the Fluid pressure of valve chamber B
Vertical view area is SH1, and SH2 is less than SH1.So, the feelings lower than the Fluid pressure in valve chamber B of the Fluid pressure in back pressure chamber H
Under condition, when being allowed to valve member 30A effect from the power that valve seat 22a floats by the Fluid pressure in back pressure chamber H, due to valve portion
The area (that is, overlooking area) of the position by the Fluid pressure in back pressure chamber H in part 30A diminishes, it is possible to reduce making
The power that valve member 30A floats from valve seat 22a.Thereby, it is possible to reduce, helical spring 63 is produced to be pushed towards valve seat 22a
The power of valve member 30A is such that it is able to valve member 30A is pushed on the power of valve seat 22a by suppression.
More than, for the present invention, enumerate and be preferred embodiment illustrated, but the rotary valve device of the present invention is not
It is defined in the structure of above-mentioned embodiment.
For example, above-mentioned first embodiment is to be provided with airtight recess 34 in the lower surface 33a in the valve element portion 33 of valve member 30
Structure, but be not limited to this or lower surface 33a be set to structure that is plane and eliminating airtight recess 34.
In the case of such a construction, when lower surface 33a is overlapping with the first valve port P1 or the second valve port P2, above-mentioned communicatively to connect
The one end on Jun Ya road 36 is configured at lower surface 33a by the mode of valve port and back pressure chamber H.
And, above-mentioned second embodiment is the flow channel switching valve (four-way switching valve) of four streams of switching, but does not limit
Due to this, for example can also be switching three streams structure, switching more than five the structure of stream flow channel switching valve.And
And, it is contemplated that the present invention may be use with connection and the valve gear blocking two streams.
And, it is in the above-described 2nd embodiment, the structure with an airtight access, but be not limited to this,
It can also be the structure with plural airtight access.For example, in the above-described embodiment it is also possible to omit valve member
30 connecting hole 33b and using open communication road 35 as airtight access.
And, in the above-described 2nd embodiment, be the valve element portion 33A of valve member 30 be provided with airtight access 34A and
The structure on open communication road 35, but be not limited to this, can also be for example valve element portion 33A only arrange airtight access 34A,
And delete the structure of the position forming open communication road 35.Even such structure eliminating open communication road 35, in valve
In each stop position of part 30A, in the second fixing port E2 and the first switching port C1 and the second switching port C2 not with
In the another part of valve chamber B that is, inner space 11a exposes and is connected in the way of connecting one side of one fixing port E1 connection
These mouthfuls are such that it is able to switch the connected relation of valve port.
And, in the respective embodiments described above, it is the structure being provided with Jun Ya road 36 in valve member 30 and valve member 30A,
But the structure being not limited to this or being provided with Jun Ya road in valve body 10.
And, in the respective embodiments described above, have the first sealing ring 61 being made up of relatively more soft elastomeric material with
And second sealing ring 62, but it is not limited to this.For example, the second of the exterior arrangement leaning on valve body 10 than the first sealing ring 61
Sealing ring 62 can also be made up of the synthetic resin that fluororesin such as polytetrafluoroethylene (PTFE) (PTFE) etc. compare hard, as long as not violating this
The purpose of invention, the structure of the first sealing ring 61 and the second sealing ring 62 is arbitrary.And if, only with the first sealing ring 61
Sealing just can be substantially ensured that, then can also be the structure omitting the second sealing ring 62.
Additionally, above-mentioned embodiment only represents the mode of the representative of the present invention, the present invention is not limited to implement
Mode.That is, those skilled in the art, can be without departing from the spirit and scope of the invention with various according to known opinion in the past
Deform and to implement.Even if because of such deformation, as long as being also equipped with the structure of the rotary valve device of the present invention, certainly it is included in this
In the category of invention.
The explanation of symbol
1 two-port valve (rotary valve device), 1A flow channel switching valve (rotary valve device), 10 valve bodies, 15
Valve member support, 15a path hole portion, the inner peripheral surface of 15a1 path hole portion, 15b large diameter hole portion, 15b1 large diameter hole
The inner peripheral surface in portion, 15c support step surface, 20,20A seat portion, 22a valve seat, 30,30A valve member, 31 circles
Post portion (axle portion), 31a path column part (path shaft portion), the outer peripheral face of 31a1 path column part, the big footpath of 31b
Column part (big journal axle part), the outer peripheral face of 31b1 big footpath column part, 31c cylindrical portion step surface (axle portion step
Face), the upper surface of 31d cylindrical portion, 32 rotation axle portion installing holes, 33,33A valve element portion, the lower end in 33a valve element portion
Face, the outer peripheral edge of 33a1 lower surface, the inner peripheral of 33a2 lower surface, the airtight access of encirclement in 33a3 lower surface
Partial outer peripheral edge, the inner peripheral of the part of the airtight access of encirclement in 33a4 lower surface, 34 airtight recesses, 34A
Airtight access, 36 Jun Ya roads, 38 sealing rings (seal member), 40 rotation axle portions, 50 rotary driving parts, 63 spiral shells
Rotation spring (pressing component), B valve chamber, C1 first switching port (valve port), C2 second switching port (valve port), E1 first is solid
Determine mouth (valve port), E2 second fixing port (valve port), G, G1 confined space, H back pressure chamber, P1 first valve port, P2
Two valve ports, the space of the inner side of Q valve body, R sealing space is (by the outer peripheral face of path shaft portion, axle portion step surface, big footpath
The space that the inner peripheral surface of hole portion and support step surface impale), the axle of L circle through hole.
Claims (6)
1. a kind of rotary valve device, possesses：Valve body, it is provided with space in inner side；Seat portion, it has towards above-mentioned space
Plane valve seat and two valve ports in this valve seat opening；Valve member, it is can slidingly and rotatably be overlapped in
The mode of above-mentioned valve seat configures in above-mentioned space, and to switch the connected relation of above-mentioned two valve port by rotation, above-mentioned
The connected relation of two valve ports and stop position accordingly determine；And pressing component, it pushes towards above-mentioned valve seat
Above-mentioned valve member,
Above-mentioned rotary valve device is characterised by,
Above-mentioned valve member has：Axle portion, it can rotatably be supported on above-mentioned valve body around axle center；And valve element portion, its located at
One end of above-mentioned axle portion, and accordingly it is opened and closed at least one of above-mentioned two valve port valve port with above-mentioned stop position,
Above-mentioned valve body passes through to divide above-mentioned space by above-mentioned valve member, thus having the side being formed at above-mentioned axle portion and appearance
Receive above-mentioned valve element portion valve chamber and be formed at above-mentioned axle portion another side back pressure chamber,
Above-mentioned valve body or above-mentioned valve member have the valve port by the opening and closing of above-mentioned valve element portion connecting in above-mentioned two valve port and
The Jun Ya road of above-mentioned back pressure chamber,
Be configured to, in the above-mentioned valve member when Fluid pressure of above-mentioned back pressure chamber is lower than the Fluid pressure of above-mentioned valve chamber by upper
State the vertical view area of the Fluid pressure of back pressure chamber, compare above-mentioned back pressure chamber Fluid pressure higher than the Fluid pressure of above-mentioned valve chamber when
Above-mentioned vertical view area little.
2. a kind of rotary valve device, possesses：Valve body, it is provided with space in inner side；Seat portion, it has towards above-mentioned space
Plane valve seat and the multiple valve ports in this valve seat opening；Valve member, it is can slidingly and rotatably be overlapped in
The mode of above-mentioned valve seat configures in above-mentioned space, and to switch the connected relation of above-mentioned multiple valve port by rotation, above-mentioned
The connected relation of multiple valve ports and stop position accordingly determine；And pressing component, it pushes towards above-mentioned valve seat
Above-mentioned valve member,
Above-mentioned rotary valve device is characterised by,
Above-mentioned valve member has：Axle portion, it can rotatably be supported on above-mentioned valve body around axle center；And valve element portion, its located at
One end of above-mentioned axle portion, and be provided with one or more airtight access, this one or more airtight access with
State formation confined space between valve seat, and accordingly connect regulation with above-mentioned stop position and combine by this confined space
Above-mentioned multiple valve ports,
Above-mentioned valve body passes through to be divided by above-mentioned valve member and is located at above-mentioned space inside valve body, thus have be formed at above-mentioned
The valve chamber in one side of axle portion and the above-mentioned valve element portion of receiving and the back pressure chamber of the another side being formed at above-mentioned axle portion,
Above-mentioned valve body or above-mentioned valve member have and connect the equal of any one of above-mentioned airtight access and above-mentioned back pressure chamber
Pressure road,
Be configured to, in the above-mentioned valve member when Fluid pressure of above-mentioned back pressure chamber is lower than the Fluid pressure of above-mentioned valve chamber by upper
State the vertical view area of the Fluid pressure of back pressure chamber, compare above-mentioned back pressure chamber Fluid pressure higher than the Fluid pressure of above-mentioned valve chamber when
Above-mentioned vertical view area little.
3. rotary valve device according to claim 1 and 2 it is characterised in that
Between above-mentioned valve body and above-mentioned valve member, it is provided with the seal member to the ring-type being sealed between them,
And it is configured to, when the Fluid pressure of above-mentioned back pressure chamber is higher than the Fluid pressure of above-mentioned valve chamber, above-mentioned seal member is pushed away
It is pressed on above-mentioned valve member, and the above-mentioned seal member when the Fluid pressure of above-mentioned back pressure chamber is lower than the Fluid pressure of above-mentioned valve chamber
It is pushed on above-mentioned valve body.
4. rotary valve device according to claim 3 it is characterised in that
The above-mentioned axle portion of above-mentioned valve member has：Path shaft portion, it is by end face towards configuring in the way of above-mentioned back pressure chamber；Greatly
Journal axle part, it is coaxially connected with the other end of this path shaft portion；And axle portion step surface, it is formed at above-mentioned path
Between the outer peripheral face of the outer peripheral face of shaft portion and above-mentioned big journal axle part,
Above-mentioned valve body has valve member support, and this valve member support is provided with：Path hole portion, it is by above-mentioned path shaft portion
It is fitting for rotating；Large diameter hole portion, above-mentioned big journal axle part is fitting for rotating by it；And support step surface, its
It is formed between inner peripheral surface and the inner peripheral surface in large diameter hole portion of above-mentioned path hole portion,
Above-mentioned seal member is arranged on by the outer peripheral face of above-mentioned path shaft portion, above-mentioned axle portion step surface, above-mentioned large diameter hole portion
In the space that inner peripheral surface and above-mentioned support step surface impale, so that the outer peripheral face to above-mentioned path shaft portion and above-mentioned big footpath
Sealed between the inner peripheral surface of hole portion.
5. a kind of rotary valve device, possesses：Valve body, it is provided with space in inner side；Seat portion, it has towards above-mentioned space
Plane valve seat and two valve ports in this valve seat opening；Valve member, it is can slidingly and rotatably be overlapped in
The mode of above-mentioned valve seat configures in above-mentioned space, and to switch the connected relation of above-mentioned two valve port by rotation, above-mentioned
The connected relation of two valve ports and stop position accordingly determine；And pressing component, it pushes towards above-mentioned valve seat
Above-mentioned valve member,
Above-mentioned rotary valve device is characterised by,
Above-mentioned valve member has：Cylindrical portion, it can rotatably be supported on above-mentioned valve body around axle center；And valve element portion, its with
One end of above-mentioned cylindrical portion is connected, and is accordingly opened and closed at least one of above-mentioned two valve port valve port with above-mentioned stop position,
Above-mentioned valve body pass through by above-mentioned valve member divide above-mentioned space, thus have the side being formed at above-mentioned cylindrical portion and
The valve chamber accommodating above-mentioned valve element portion and the back pressure chamber of the another side being formed at above-mentioned cylindrical portion,
Above-mentioned valve body or above-mentioned valve member have the valve port by the opening and closing of above-mentioned valve element portion connecting in above-mentioned two valve port and
The Jun Ya road of above-mentioned back pressure chamber,
Above-mentioned cylindrical portion has：Path column part, it is by end face towards configuring in the way of above-mentioned back pressure chamber；Big footpath cylindrical portion
Point, it is coaxially connected with the other end of this path column part；And cylindrical portion step surface, it is formed at above-mentioned path circle
Between the outer peripheral face of the outer peripheral face of post part and above-mentioned big footpath column part,
Above-mentioned valve body has valve member support, and this valve member support is provided with：Path hole portion, it is by above-mentioned path cylindrical portion
Divide and be fitting for rotating；Large diameter hole portion, above-mentioned big footpath column part is fitting for rotating by it；And support step
Face, it is formed between the inner peripheral surface of above-mentioned path hole portion and the inner peripheral surface in large diameter hole portion,
The outer peripheral face by above-mentioned path column part, above-mentioned cylindrical portion step surface, the inner peripheral surface in above-mentioned large diameter hole portion and on
State in the space that support step surface impales, be provided with the inner circumferential of the outer peripheral face to above-mentioned path column part and above-mentioned large diameter hole portion
The seal member of the ring-type being sealed between face.
6. a kind of rotary valve device, possesses：Valve body, it is provided with space in inner side；Seat portion, it has towards above-mentioned space
Plane valve seat and the multiple valve ports in this valve seat opening；Valve member, it is can slidingly and rotatably be overlapped in
The mode of above-mentioned valve seat configures in above-mentioned space, and to switch the connected relation of above-mentioned multiple valve port by rotation, above-mentioned
The connected relation of multiple valve ports and stop position accordingly determine；And pressing component, it pushes towards above-mentioned valve seat
Above-mentioned valve member,
Above-mentioned rotary valve device is characterised by,
Above-mentioned valve member has：Cylindrical portion, it can rotatably be supported on above-mentioned valve body around axle center；And valve element portion, its with
One end of above-mentioned cylindrical portion is connected, and is provided with one or more airtight access, this one or more airtight access
Form confined space between above-mentioned valve seat, and rule are accordingly connected with above-mentioned stop position by this confined space
Above-mentioned multiple valve ports of fixed combination,
Above-mentioned valve body passes through to be divided by above-mentioned valve member and is located at above-mentioned space inside valve body, thus have be formed at above-mentioned
The valve chamber in one side of cylindrical portion and the above-mentioned valve element portion of receiving and the back pressure chamber of the another side being formed at above-mentioned cylindrical portion,
Above-mentioned valve body or above-mentioned valve member have and connect the equal of any one of above-mentioned airtight access and above-mentioned back pressure chamber
Pressure road,
Above-mentioned cylindrical portion has：Path column part, it is by end face towards configuring in the way of above-mentioned back pressure chamber；Big footpath cylindrical portion
Point, it is coaxially connected with the other end of this path column part；And cylindrical portion step surface, it is formed at above-mentioned path circle
Between the outer peripheral face of the outer peripheral face of post part and above-mentioned big footpath column part,
Above-mentioned valve body has valve member support, and this valve member support is provided with：Path hole portion, it is by above-mentioned path cylindrical portion
Divide and be fitting for rotating；Large diameter hole portion, above-mentioned big footpath column part is fitting for rotating by it；And support step
Face, it is formed between the inner peripheral surface of above-mentioned path hole portion and the inner peripheral surface in large diameter hole portion,
The outer peripheral face by above-mentioned path column part, above-mentioned cylindrical portion step surface, the inner peripheral surface in above-mentioned large diameter hole portion and on
State in the space that support step surface impales, be provided with the inner circumferential of the outer peripheral face to above-mentioned path column part and above-mentioned large diameter hole portion
The seal member of the ring-type being sealed between face.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013059619A JP5907506B2 (en) | 2013-03-22 | 2013-03-22 | Rotary valve device |
| JP2013-059619 | 2013-03-22 | ||
| PCT/JP2013/082704 WO2014147897A1 (en) | 2013-03-22 | 2013-12-05 | Rotary valve device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105190136A CN105190136A (en) | 2015-12-23 |
| CN105190136B true CN105190136B (en) | 2017-02-08 |
Family
ID=51579608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380074846.3A Active CN105190136B (en) | 2013-03-22 | 2013-12-05 | Rotary valve device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5907506B2 (en) |
| CN (1) | CN105190136B (en) |
| WO (1) | WO2014147897A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109196257A (en) * | 2016-06-03 | 2019-01-11 | 日本电产三协株式会社 | Valve gear |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6510810B2 (en) * | 2014-12-26 | 2019-05-08 | 株式会社不二工機 | Flow path switching valve |
| JP6969895B2 (en) | 2017-05-09 | 2021-11-24 | 日本電産サンキョー株式会社 | Valve device |
| JP6945859B2 (en) * | 2018-06-04 | 2021-10-06 | 株式会社不二工機 | Flow switching valve |
| JP7227931B2 (en) * | 2020-01-31 | 2023-02-22 | 株式会社鷺宮製作所 | Rotary switching valve |
| JP7425719B2 (en) * | 2020-12-25 | 2024-01-31 | 株式会社鷺宮製作所 | Rotary type switching valve |
| CN117957390A (en) | 2021-09-21 | 2024-04-30 | 伊格尔工业股份有限公司 | Switching valve |
| WO2024082078A1 (en) * | 2022-10-17 | 2024-04-25 | 广东德昌电机有限公司 | Thermal management system and valve thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308197A (en) * | 2000-02-10 | 2001-08-15 | 株式会社不二工机 | Four-way converting valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001141093A (en) * | 1999-11-10 | 2001-05-25 | Chiyoda Kucho Kiki Kk | Four passage selector valve |
| JP2002089739A (en) * | 2000-09-11 | 2002-03-27 | Saginomiya Seisakusho Inc | Passage selector valve |
| US6889710B2 (en) * | 2002-11-15 | 2005-05-10 | Air Products And Chemicals, Inc. | Rotary sequencing valve with flexible port plate |
| CN102047014B (en) * | 2008-06-02 | 2013-12-11 | 株式会社鹭宫制作所 | Flow path selector valve |
-
2013
- 2013-03-22 JP JP2013059619A patent/JP5907506B2/en active Active
- 2013-12-05 WO PCT/JP2013/082704 patent/WO2014147897A1/en active Application Filing
- 2013-12-05 CN CN201380074846.3A patent/CN105190136B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308197A (en) * | 2000-02-10 | 2001-08-15 | 株式会社不二工机 | Four-way converting valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109196257A (en) * | 2016-06-03 | 2019-01-11 | 日本电产三协株式会社 | Valve gear |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5907506B2 (en) | 2016-04-26 |
| WO2014147897A1 (en) | 2014-09-25 |
| JP2014185662A (en) | 2014-10-02 |
| CN105190136A (en) | 2015-12-23 |
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