WO2005124200A1 - 冷媒用閉鎖弁 - Google Patents
冷媒用閉鎖弁 Download PDFInfo
- Publication number
- WO2005124200A1 WO2005124200A1 PCT/JP2005/010838 JP2005010838W WO2005124200A1 WO 2005124200 A1 WO2005124200 A1 WO 2005124200A1 JP 2005010838 W JP2005010838 W JP 2005010838W WO 2005124200 A1 WO2005124200 A1 WO 2005124200A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- refrigerant
- flow path
- shut
- space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
- F16K1/04—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
Definitions
- the present invention relates to a refrigerant shut-off valve.
- refrigerant shut-off valves for sealing refrigerant in refrigerant equipment such as air conditioners and refrigerators have been used.
- Some of the refrigerant shut-off valves include a main body having therein a refrigerant flow path through which the refrigerant flows, and a valve body that moves so as to approach or retreat with respect to the refrigerant flow path.
- the valve when the refrigerant flow path is closed, the valve moves in a direction approaching the refrigerant flow, and the valve blocks the refrigerant flow.
- the valve element moves in a direction to retreat with respect to the refrigerant flow path, thereby opening the refrigerant flow path blocked by the valve element.
- Patent Document 1 Japanese Patent Application Laid-Open No. Hei 9 138037 (FIG. 1)
- the refrigerant shut-off valve as described above is closed when it is necessary to seal the refrigerant at the time of transfer or maintenance of the refrigerant equipment, but normally, the refrigerant circulates through the refrigerant equipment. Open to the public.
- the refrigerant shut-off valve is opened, a pressure loss of the refrigerant occurs due to the influence of the force valve body on the refrigerant flow through the refrigerant flowing through the refrigerant flow path.
- An object of the present invention is to provide a refrigerant shut-off valve capable of reducing pressure loss of a refrigerant.
- the refrigerant shut-off valve according to the first invention includes a main body and a valve body.
- the main body includes a first refrigerant flow path, a second refrigerant flow path, an intermediate flow path communicating the first refrigerant flow path and the second refrigerant flow path, and a valve passage communicating with the intermediate flow path.
- the valve element is inserted into the valve passage so as to be movable in the axial direction, and moves in the first direction from the valve passage side to the intermediate passage side to shut off between the first refrigerant passage and the second refrigerant passage.
- the second direction from the intermediate flow path to the valve passage The opening between the first refrigerant flow path and the second refrigerant flow path is opened by moving in the opposite direction.
- the valve body has a concave portion that is concave in the second direction in the second direction.
- the distal end portion of the valve element has a shape recessed in the second direction from the distal end surface facing the intermediate flow path. Therefore, the influence of the valve element on the flow of the refrigerant is reduced, and the pressure loss of the refrigerant due to the valve element can be reduced.
- a refrigerant shut-off valve is the refrigerant shut-off valve of the first invention, wherein the first refrigerant flow passage and the second refrigerant flow passage are bent at a predetermined angle. Have been. Further, the second coolant flow passage and the valve passage are coaxially arranged with the intermediate flow passage therebetween. And a main-body part has a valve seat. The valve seat is located at a boundary between the intermediate flow path and the second refrigerant flow path 22, and is a portion at which the tip of the valve body contacts or separates.
- a refrigerant shut-off valve according to a third invention is the refrigerant shut-off valve of the first or second invention, wherein the recess forms a cylindrical space therein.
- the pressure loss of the refrigerant can be further reduced because the concave portion has a shape that forms a cylindrical space inside.
- a refrigerant shut-off valve according to a fourth invention is the refrigerant shut-off valve of the first invention or the second invention, wherein the concave portion includes a first concave portion concaved in a second direction in a front end surface force, and a first concave portion. And a second recess recessed in the second direction.
- the concave portion has the first concave portion and the second concave portion, and has a shape in which the front end surface is depressed in a plurality of stages, so that the pressure loss of the refrigerant can be further reduced.
- a refrigerant shut-off valve is the refrigerant shut-off valve according to the fourth aspect of the present invention, wherein the first concave portion has a cylindrical first space formed therein, and the second concave portion has the first concave portion. No. of cylindrical shape inside Form two spaces. And the second space has a smaller diameter than the first space.
- the diameter of the second space of the second recess is smaller than that of the first space of the first recess.
- a refrigerant shut-off valve according to a sixth invention is the refrigerant shut-off valve of the fourth invention, wherein the first recess is
- the second recess has a curved shape that is recessed in the second direction from the bottom surface of the first recess.
- the shape of the second recess located on the second direction side is a curved surface among the shapes recessed in a plurality of stages.
- the pressure loss of the refrigerant can be further reduced by the concave portion having such a shape.
- a refrigerant shut-off valve according to a seventh aspect of the present invention is the refrigerant shut-off valve according to the first or second aspect of the present invention, wherein the concave portion has a truncated conical space that expands in diameter in a first direction. Formed inside.
- the recess has a shape such that a frustoconical space that expands in diameter in the first direction is formed therein, so that the pressure loss of the refrigerant can be further reduced.
- a refrigerant shut-off valve according to an eighth aspect of the present invention is the refrigerant shut-off valve according to the first or second aspect of the present invention, wherein the bottom surface of the concave portion has a curved surface concave in the second direction.
- the bottom surface of the concave portion has a curved surface shape depressed in the second direction, so that the pressure loss of the refrigerant can be further reduced.
- a refrigerant closing valve is the refrigerant closing valve of the first invention or the second invention, wherein the concave portion has a conical space whose diameter increases in a first direction to expand the inside thereof.
- the recess has a shape in which a conical space that expands in diameter in the first direction is formed therein, thereby further reducing the pressure loss of the refrigerant. It comes out.
- the distal end portion of the valve body has a distal end surface force facing the intermediate flow path, and has a shape recessed in the second direction. For this reason, the valve body has an effect on the flow of the refrigerant. The sound is reduced, and the pressure loss of the refrigerant due to the valve body can be reduced.
- the valve element when the valve element moves in the first direction, the valve element contacts the valve seat and the boundary between the intermediate flow passage and the valve passage is closed, so that the flow of the refrigerant is reduced. Can be shut off. Further, when the valve element moves in the second direction, the valve element separates from the valve seat, and the boundary between the intermediate flow path and the valve passage is opened, so that the flow of the refrigerant can be released.
- the pressure loss of the refrigerant can be further reduced because the concave portion has a shape that forms a cylindrical space inside.
- the pressure loss of the refrigerant can be further reduced since the concave portion has a concave shape with a plurality of stages of the front end surface force.
- the pressure loss of the refrigerant can be further reduced because the second space of the second recess is smaller in diameter than the first space of the first recess.
- the pressure loss of the refrigerant can be further reduced by forming the curved shape of the second concave portion located on the second direction side among the concave shapes in a plurality of stages. Can be.
- the pressure loss of the refrigerant can be further reduced by forming the truncated cone-shaped space in which the concave portion expands in diameter in the first direction.
- the pressure loss of the refrigerant can be further reduced because the bottom surface of the concave portion has a curved surface shape depressed in the second direction.
- the concave portion further reduces the pressure loss of the refrigerant by forming a conical space inside the concave portion that expands in diameter in the first direction. be able to.
- FIG. 1 is a cross-sectional view (open state) of a refrigerant shut-off valve.
- FIG. 3 is a view showing the shape of a concave portion acting on shape (1).
- FIG. 4 is a view showing a shape of a concave portion acting on a shape (2).
- FIG. 5 is a view showing a shape of a concave portion acting on a shape (3).
- FIG. 6 is a view showing a shape of a concave portion acting on a shape (4).
- [7] A diagram showing the shape of the concave portion acting on the shape (5).
- FIG. 8 is a view showing the shape of the concave portion acting on the shape (6).
- FIG. 1 is a cross-sectional view of a refrigerant shut-off valve 100 according to an embodiment of the present invention.
- the refrigerant shut-off valve 100 is a shut-off valve provided in an outdoor unit of an air conditioner (not shown) including an indoor unit, an outdoor unit, and a communication pipe connecting the indoor unit and the outdoor unit. 1, valve body 2, seal cap 3, valve core 4, valve core cap 5, and nut 7.
- the main body 1 has a first cylindrical part la, a second cylindrical part lb, a third cylindrical part lc, and a fourth cylindrical part Id.
- Each of the cylindrical portions la-Id has a substantially cylindrical shape having a through hole therein, and one end thereof is connected to each other such that the inner peripheral surfaces of the through holes are continuous.
- the other end of the first cylindrical portion la is provided with a first connection port 11 to which a communication pipe is connected.
- the other end of the second cylindrical portion lb is provided with a second connection port 12 to which an internal pipe in the outdoor unit is connected.
- the other end of the third cylindrical portion lc is provided with a service port 14 to which a hose such as a vacuum pump (not shown) is connected.
- the other end of the fourth cylindrical portion Id is provided with an operation port 15 into which a wrench for moving the valve body 2 is inserted.
- the second cylindrical part lb is And an angle of about 90 degrees with the first cylindrical portion la.
- the third cylindrical portion lc forms an angle of about 90 degrees with the second cylindrical portion 1b, and is arranged in a straight line with the first cylindrical portion la.
- the fourth cylindrical portion forms an angle of about 90 degrees with the first cylindrical portion la and the third cylindrical portion lc, and is arranged linearly with the second cylindrical portion lb.
- a first refrigerant flow passage 21 is provided inside the first cylindrical portion la
- a second refrigerant flow passage 22 is provided inside the second cylindrical portion lb.
- a valve core passage 23 is provided inside the third cylindrical portion lc, and a valve passage 24 is provided inside the fourth cylindrical portion Id.
- the first refrigerant passage 21, the second refrigerant passage 22, the valve core passage 23, and the valve passage 24 are radially arranged in four directions around the intermediate flow passage 25, and communicate with the intermediate flow passage 25. I have. Further, the first refrigerant flow path 21 and the valve core passage 23 are coaxially arranged with the intermediate flow path 25 interposed therebetween, and the second refrigerant flow path 22 and the valve passage 24 are coaxially arranged with the intermediate flow path 25 interposed therebetween. ing.
- the valve core passage 23 is closed by the valve core 4 and the valve passage 24 is closed by the valve body 2, the first refrigerant flow path 21, the intermediate flow path 25, and the second refrigerant flow path 22 A flow path 26 is formed.
- the refrigerant flow path 26 has an L-shape bent at 90 degrees in the middle.
- a first direction see arrow A1 in FIG. 1
- a second direction see arrow A2 in FIG. 2
- valve seat 10 At the boundary between the intermediate flow passage 25 and the second refrigerant flow passage 22, there is provided a valve seat 10 with which the tip of the valve body 2 comes into contact with or separates from the valve body 10.
- the valve seat 10 is expanded in diameter in the second direction. It has a tapered shape.
- the valve element 2 has a substantially columnar shape, and is disposed in the valve passage 24 of the fourth cylindrical portion Id so as to be movable in the axial direction.
- the distal end of the valve body 2 faces the intermediate flow path 25 and has a tapered shape whose diameter decreases in the first direction.
- a hexagonal hole (not shown) into which a hexagonal wrench is inserted is formed at the rear end of the valve body 2.
- connection with the coolant flow path 22 is shut off. Further, when the refrigerant shut-off valve 100 is opened, by moving the valve element 2 in the second direction, the tip thereof is separated from the valve seat 10 so that the first refrigerant flow path 21 and the second refrigerant flow path Communicate with 22. A force recess provided at the tip of the valve body 2 for reducing the pressure loss of the refrigerant will be described in detail later.
- An annular groove 2b is formed on the outer periphery of the valve body 2, and an O-ring 6 is fitted in the groove 2b. As a result, the space between the inner peripheral surface of the valve passage 24 and the outer peripheral surface of the valve element 2 is sealed, so that the refrigerant does not leak outside.
- the seal cap 3 is normally attached to the other end of the fourth cylindrical portion Id, and closes the operation port 15. When the refrigerant shut-off valve 100 is opened and closed, it is removed from the other end of the fourth cylindrical portion Id. The space between the seal cap 3 and the main body 1 is sealed by a seal member.
- the valve core 4 is inserted into the valve core passage 23 and closes the valve core passage 23.
- the valve core 4 is opened, and the communication pipe connected to the first connection port 11 via the service port 14 and the first connection port 11 is evacuated. .
- the knurled core cap 5 is normally attached to the other end of the third cylindrical portion lc, and closes the service port 14.
- the valve core cap 5 is removed from the other end of the third cylindrical portion lc when evacuating the communication pipe.
- a seal is provided between the screw 18 on the inner periphery of the valve core cap 5 and the screw 17 on the inner periphery of the third cylindrical portion lc.
- the nut 7 has a screw 19 on its inner periphery that is screwed with a screw 16 formed on the outer periphery of the first connection port 11, and connects the first connection port 11 to the communication pipe.
- the distal end of the valve body 2 is provided with the concave portions 31-35, 40 which are recessed in the second direction from the distal end surface 30 of the valve body 2. Forty-five, 35, and 40 specific shapes, there are five types from shape (1) to shape (5). [Shape (1)]
- the concave portion 31 forms a cylindrical space arranged coaxially with the axis of the valve body 2 therein.
- the diameter of the valve element 2 is dl
- the diameter of the distal end surface 30 of the valve element 2 is d2 (dl> d2)
- the diameter of the first refrigerant flow path 21 is d3 (see FIG. 1)
- the diameter of the space formed by the recess 31 is
- L1 is the depth of the recess of the recess 31, that is, the height of the space formed by the recess 31, the following two conditions are satisfied at the same time.
- FIG. 3 (b) is a view of FIG. 3 (a) viewed from the axial direction.
- the recess 32 has a first recess 36 recessed in the second direction from the distal end surface 30, and a second recess 37 recessed in the second direction also with the bottom surface force of the first recess 36. .
- the concave portion 32 has a space formed therein in which the diameter is gradually reduced in the second direction.
- the concave portion 32 has a shape that is concave in two steps.
- the first concave portion 36 forms a cylindrical first space disposed coaxially with the axis of the valve body 2 therein.
- the second concave portion 37 forms therein a cylindrical second space disposed coaxially with the axis of the valve body 2. And the second space has a smaller diameter than the first space.
- the diameter of the first space is L3
- the diameter of the second space is L4 (L3> L4)
- the depth from the tip surface 30 to the bottom of the second space that is, the height of the cylindrical shape of the first space and the cylindrical shape of the second space
- FIG. 4 (b) is a view of FIG. 4 (a) viewed from the axial direction.
- the recess 33 has a first recess 38 recessed in the second direction from the distal end surface 30, and a second recess 39 recessed in the second direction also with the bottom surface force of the first recess 38. .
- the recess 33 is the second side A space whose diameter gradually decreases in the direction is formed in the interior, and in this shape, the shape is concave in two steps.
- the first concave portion 38 forms a cylindrical first space disposed coaxially with the axis of the valve body 2 therein.
- the second concave portion 39 has a curved surface shape that is concave in a semi-elliptical shape in the second direction from the bottom surface of the first concave portion 38.
- the second space formed by the second concave portion 39 has a circular shape arranged coaxially with the axis of the valve element 2 in the axial cross section. Further, the diameter L6 of the second space in the axial cross section is smaller than the diameter L5 of the first space.
- FIG. 5 (b) is a diagram of FIG. 5 (a) viewed from the axial direction.
- the concave portion 34 forms a truncated conical space arranged coaxially with the axis of the valve body 2 therein.
- the shape of the truncated cone increases in the first direction, and the diameter L7 of the bottom surface in the first direction of the truncated cone is smaller than the diameter L8 of the bottom surface in the second direction.
- FIG. 6B is a view of FIG. 6A viewed from the axial direction.
- FIG. 7 (b) is a diagram of FIG. 7 (a) viewed from the axial direction.
- the concave portion 40 forms a conical space disposed coaxially with the axis of the valve body 2 therein.
- the conical shape increases in diameter in the first direction.
- FIG. 8B is a view of FIG. 8A viewed from the axial direction.
- the refrigerant flow path 26 is closed at the time of transfer or maintenance of the air conditioner, and the communication pipe is disconnected from the first connection port 11 of the main body 1, thereby connecting the outdoor unit and the indoor unit. Can be separated.
- the refrigerant flow passage 26 can be opened, and the pressure loss of the refrigerant flowing through the refrigerant flow passage 26 can be reduced by forming the valve body 2 as described above. Can be.
- the pressure loss of the refrigerant flowing through the refrigerant flow passage 26 can be reduced by the shape of the valve body 2, the Cv value (flow coefficient) can be improved without making the refrigerant flow passage 26 wide. it can. Thus, the size of the refrigerant shut-off valve 100 can be reduced.
- the Cv value can be improved without changing the shape of the main body 1, an existing mold for manufacturing the main body 1 can be used, and cost can be reduced.
- the refrigerant shut-off valve 100 connected to the communication pipe connecting the indoor unit and the outdoor unit of the air conditioner has been described. May be used.
- the refrigerant flow path 26 has a shape bent at 90 degrees, but the refrigerant flow path 26 may have a linear shape.
- the present invention has an effect of reducing the pressure loss of the refrigerant, and is useful as a refrigerant shut-off valve.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004177124A JP2006002798A (ja) | 2004-06-15 | 2004-06-15 | 冷媒用閉鎖弁 |
| JP2004-177124 | 2004-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005124200A1 true WO2005124200A1 (ja) | 2005-12-29 |
Family
ID=35509761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/010838 Ceased WO2005124200A1 (ja) | 2004-06-15 | 2005-06-14 | 冷媒用閉鎖弁 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006002798A (ja) |
| WO (1) | WO2005124200A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6464639B2 (ja) * | 2014-09-29 | 2019-02-06 | ダイキン工業株式会社 | 開閉弁 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514393A (en) * | 1978-07-07 | 1980-01-31 | Bbc Brown Boveri & Cie | Control valve |
| JPS5618167A (en) * | 1979-07-19 | 1981-02-20 | Centre Tekuniku Desu Ind Mekan | Vibrationnproof valve |
| JPS62209275A (ja) * | 1986-03-06 | 1987-09-14 | Mitsubishi Heavy Ind Ltd | 蒸気加減弁 |
| JPH09138037A (ja) * | 1995-11-16 | 1997-05-27 | Daikin Ind Ltd | 閉鎖弁およびその盲キャップ |
-
2004
- 2004-06-15 JP JP2004177124A patent/JP2006002798A/ja active Pending
-
2005
- 2005-06-14 WO PCT/JP2005/010838 patent/WO2005124200A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514393A (en) * | 1978-07-07 | 1980-01-31 | Bbc Brown Boveri & Cie | Control valve |
| JPS5618167A (en) * | 1979-07-19 | 1981-02-20 | Centre Tekuniku Desu Ind Mekan | Vibrationnproof valve |
| JPS62209275A (ja) * | 1986-03-06 | 1987-09-14 | Mitsubishi Heavy Ind Ltd | 蒸気加減弁 |
| JPH09138037A (ja) * | 1995-11-16 | 1997-05-27 | Daikin Ind Ltd | 閉鎖弁およびその盲キャップ |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006002798A (ja) | 2006-01-05 |
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