CN108343750B - Electric valve and refrigeration cycle system - Google Patents
Electric valve and refrigeration cycle system Download PDFInfo
- Publication number
- CN108343750B CN108343750B CN201711474527.8A CN201711474527A CN108343750B CN 108343750 B CN108343750 B CN 108343750B CN 201711474527 A CN201711474527 A CN 201711474527A CN 108343750 B CN108343750 B CN 108343750B
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- valve
- annular surface
- axis
- support member
- fixing metal
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 56
- 238000003466 welding Methods 0.000 claims description 25
- 238000007665 sagging Methods 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
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
- 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
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Valve Housings (AREA)
Abstract
The invention provides an electric valve and a refrigeration cycle system, wherein the electric valve (100) is formed by assembling a support member (2) and a closed shell (3) relative to a valve shell (1), and a fixing metal piece (23) of the support member and the closed shell are reliably welded relative to the valve shell, a step part (11) is arranged on the whole circumference of an opening end part of the valve shell, the step part is composed of an inner first annular surface (11a) and an outer second annular surface (11b), the fixing metal piece (23) is arranged on the inner side of the second annular surface (11b), a flange part (232) is abutted against the first annular surface (11a), the whole circumference of an abutting part of the first annular surface (11a) and the flange part (232) is welded, the second annular surface (11b) is abutted against an opening end part of the lower end part of the closed shell, the whole circumference of an abutting part of the second annular surface (11b) and the opening end part of the closed shell is welded relative to the valve shell, and the support member and the closed shell are welded at different positions in the direction of an axis (L).
Description
Technical Field
The present invention relates to an electrically operated valve used in a refrigeration cycle system or the like and a refrigeration cycle system.
Background
Conventionally, as such an electrically operated valve, a rotor shaft and a valve member are operated via a screw feed mechanism by rotation of a magnetic rotor and the rotor shaft of a stepping motor, and a valve port is opened and closed by the valve member. In addition, the rotor shaft is provided with a support member for supporting the rotor shaft. Such an electrically operated valve is disclosed in, for example, japanese patent No. 5395775 (patent document 1).
In addition, in the conventional motor-operated valve, a flow path of a fluid needs to be sealed, and a motor magnetic rotor is housed in a cylindrical sealed case (housing) that forms a sealed structure together with a valve main body. The valve body and the sealed housing are hermetically fixed by welding or the like. In addition, a male screw portion is formed on the rotor shaft of the stepping motor, and the male screw portion is screwed with the female screw portion of the support member, whereby the rotor shaft is supported by the support member. The support member and the hermetic case are assembled to an upper portion of the valve housing (valve main body).
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5395775
Disclosure of Invention
Problems to be solved by the invention
In the technique of patent document 1, when the support member and the hermetic case are assembled to the valve case, the support member is first fitted to the opening end portion of the valve case, and the fixing metal fitting and the periphery of the opening end portion of the valve case are fixed by welding. Then, the hermetic case is fixed to the opening end portion of the valve case by welding.
As described above, in the conventional technique, the support member and the hermetic case are generally fixed to the same end surface of the opening end portion of the valve case by welding, and therefore, there are the following problems. Since the fixing metal fitting of the support member is welded to the end surface of the opening end portion of the valve case, a fused portion (weld bead portion) of the fixing metal fitting due to welding is formed on the end surface of the opening end portion of the valve case when the hermetic case is assembled. Therefore, the sealed case and the melt-solidified portion may interfere with each other, and the sealed case may be displaced or a welding failure may occur.
The present invention addresses the problem of providing an electrically operated valve in which a support member for supporting a rotor shaft on an axis and a sealed housing for housing a magnetic rotor are assembled to a valve body, wherein a fixing metal fitting of the support member and the sealed housing are reliably welded to the valve body without causing a welding failure.
Means for solving the problems
The motor-operated valve according to claim 1 is a motor-operated valve in which a cylindrical metallic closed housing is assembled to a cylindrical metallic valve body, the valve body incorporating a valve member that is operated by rotation of a magnetic rotor of a motor portion and a rotor shaft, the support member supporting the rotor shaft on an axis, the closed housing accommodating the magnetic rotor, the motor-operated valve being characterized in that the support member includes a fixing metal fitting that forms a protruding surface protruding in a direction orthogonal to the axis around an outer periphery of the axis, the support member has a first annular surface located inside a plane orthogonal to the axis around the axis at an opening end portion of the valve body to which the support member is fitted, and has a second annular surface located outside the plane orthogonal to the axis around an entire periphery of the axis, and the first annular surface and the second annular surface form a step portion so as to be different in position in the axial direction, and an abutting portion of the first annular surface of the valve body and the fixing metal of the support member is welded, and an abutting portion of the second annular surface of the valve body and an opening end portion of the hermetic case is welded.
The motor-operated valve according to claim 1 of claim 2 is characterized in that the fixing metal fitting has a sagging surface portion formed by press working of a sheet metal, and a back surface side of the sagging surface portion is brought into contact with the first annular surface and a portion in contact therewith is welded.
The electrically operated valve according to claim 2 of claim 3, wherein the fixing metal fitting has an asymmetrical shape with respect to a plane orthogonal to the axis.
The motor-operated valve according to claim 4, wherein the support member has a resin base portion that is press-fitted into the opening end portion of the valve main body, the fixing metal fitting has a cylindrical edge that is centered on the axis, and a flange portion that forms a protruding surface that protrudes in a direction orthogonal to the axis L on an outer periphery of the edge, and the fixing metal fitting is disposed in the base portion such that the edge is located inside the valve main body, and is insert-molded together with the base portion.
The refrigeration cycle system according to claim 5 includes a compressor, a condenser, an expansion valve, and an evaporator, and is characterized in that the electric valve according to any one of claims 1 to 4 is used as the expansion valve.
Effects of the invention
According to the motor-operated valve of claims 1 to 4, when the support member and the sealed housing are assembled to the valve body, the position of the first annular surface of the welding fixture fitting and the position of the second annular surface for welding the sealed housing in the axial direction are different, and therefore, when the sealed housing is welded, the molten and solidified portion does not interfere with the sealed housing, and the sealed housing can be reliably welded.
According to the motor-operated valve of claim 2, since the burr surface portion generated at the time of press-working the fixing metal fitting abuts against the first annular surface of the valve main body and is welded, there is no gap as in the case of abutting against the sagging surface portion at the time of welding, and therefore, fusion and insufficient strength at the time of welding are eliminated, and stable weldability is obtained.
According to the motor-operated valve of claim 3, since the fixing metal fitting has an asymmetrical shape with respect to the surface orthogonal to the axis, the burr surface is surely brought into contact with the first annular surface of the valve main body by the metal mold structure in which the fixing metal fitting is turned over and cannot enter at the time of insert molding of the support member, and therefore, stable weldability can be obtained, and the surface-back surface separation work is not required, and the assembling property is improved.
According to the electrically operated valve of claim 4, since the edge of the fixing metal fitting is disposed inside the base portion of the support member and inside the valve main body, even if stress is generated in the base portion when the base portion of the support member is press-fitted into the opening end portion of the valve main body, deformation of the inner diameter surface of the base portion can be prevented by the reinforcing action of the edge, and deterioration of the valve operability can be prevented without deterioration of the movement of the valve frame that slides on the inner diameter surface of the base portion.
According to the refrigeration cycle system of embodiment 5, the same effects as those of embodiments 1 to 4 can be obtained.
Drawings
Fig. 1 is a longitudinal sectional view of an electric valve according to a first embodiment of the present invention.
Fig. 2 is a sectional view and a partially enlarged sectional view of a fixing metal fitting of the motor-operated valve according to the first embodiment.
Fig. 3 is a sectional view of the valve housing, support member, and assembled portion of the hermetic housing of the electric valve of the first embodiment.
Fig. 4 is a sectional view of an assembled portion of a valve housing, a support member, and a hermetic housing of the electric valve of the second embodiment.
Fig. 5 is a diagram showing a refrigeration cycle system according to an embodiment.
In the figure:
1-a valve housing (valve body), 11-a stepped portion, 11 a-a first annular surface, 11B-a second annular surface, 101-a first joint pipe, 102-a second joint pipe, 103-a valve seat ring, 103 a-a valve port, 2-a support member, 21-a shelf portion, 21 a-an internal thread portion, 22-a base portion, 23-a fixing metal member, 231-an edge, 232-a flange portion, a undercut surface portion, B-a burr surface portion, 3-a sealed housing, 4-a valve frame, 5-a needle valve (valve member), 6-a stepping motor (motor portion), 61-a rotor shaft, 61 a-an external thread portion, 62-a magnetic rotor, 63-a stator coil, P-a fused section, Q-a fused section, 1 '-a valve housing (valve body), 12-a stepped portion, 12 a-a first annular surface, 12B-a second annular surface, 23' -a fixing metal member, 232 '-a flange portion, 3' -a sealed housing, P '-a fused section, Q' -a fused section, a valve housing (valve body), 12 '-a stepped portion, 12a first annular surface, 12B-a second annular surface, 23' -a fixing metal member, 232 '-a heat exchanger, 3' -a heat exchanger, an outdoor.
Detailed Description
Next, embodiments of an electric valve and a refrigeration cycle system according to the present invention will be described with reference to the drawings. Fig. 1 is a longitudinal sectional view of a motor-operated valve according to a first embodiment, fig. 2 is a sectional view and a partially enlarged sectional view of a fixing metal fitting of the motor-operated valve according to the first embodiment, and fig. 3 is a sectional view of an assembly portion of a valve housing, a support member, and a hermetic housing of the motor-operated valve according to the first embodiment. Note that the concept of "up and down" in the following description corresponds to up and down in the drawing of fig. 1.
The motor-operated valve 100 includes a valve housing 1 as a "valve main body", a support member 2, a hermetic housing 3, a valve frame 4, a needle valve 5 as a "valve member", and a stepping motor 6 as a "motor portion".
The valve housing 1 is formed in a substantially cylindrical shape from stainless steel or the like, and has a valve chamber 1R inside. A first joint pipe 101 that communicates with the valve chamber 1R is connected to the outer peripheral side of the valve housing 1, and a second joint pipe 102 is connected to a cylindrical portion that extends downward from the lower end. Further, a valve seat 103 is fitted to the valve chamber 1R side of the second joint pipe 102. The inside of the valve seat 103 forms a valve port 103a, and the second joint pipe 102 communicates with the valve chamber 1R through the valve port 103 a. The first joint pipe 101, the second joint pipe 102, and the valve seat ring 103 are fixed to the valve housing 1 by welding or the like.
The support member 2 has a central frame portion 21, a thick base portion 22 on the outer periphery of the frame portion 21, and a fixing metal member 23 described later, and the fixing metal member 23 is integrally provided with the frame portion 21 and the base portion 22 by insert molding, whereby the fixing metal member 23 is protrudingly provided on the outer periphery around the axis L of the support member 2, and further, as described later, the support member 2 is fixed to the upper end portion of the valve housing 1 by welding via the fixing metal member 23, and a cylindrical guide hole 21b having a diameter larger than that of the screw hole of the internal screw portion 21a is formed in the center of the frame portion 21, together with an internal screw portion 21a and a screw hole thereof coaxial with the axis L.
The hermetic case 3 is formed in a substantially cylindrical shape with its upper end closed, and is airtightly fixed to the upper end of the valve case 1 by welding as described later. A guide 31 is provided at an upper portion in the sealed case 3, and a rotation stopper mechanism 32 is provided on an outer periphery of the guide 31.
The valve holder 4 is a cylindrical member fitted in the guide hole 21b of the support member 2 and slidably arranged in the direction of the axis L, and the needle valve 5 is fixed to the lower end portion of the valve holder 4. in the valve holder 4, a spring seat 41 is provided movably in the direction of the axis L, and a compression coil spring 42 is attached between the spring seat 41 and the needle valve 5 in a state where a predetermined load is applied.
The stepping motor 6 includes a rotor shaft 61, a magnetic rotor 62 rotatably disposed inside the sealed casing 3, a stator coil 63 disposed on the outer periphery of the sealed casing 3 so as to face the magnetic rotor 62, and other yokes and exterior components, not shown. The rotor shaft 61 is attached to the center of the magnetic rotor 62, and the rotor shaft 61 extends toward the support member 2. A male screw portion 61a is formed on the outer periphery of the rotor shaft 61 on the support member 2 side, and the male screw portion 61a is screwed to the female screw portion 21a of the support member 2. In the guide hole 21b of the support member 2, the upper end portion of the valve holder 4 is engaged with the lower end portion of the rotor shaft 61, and the valve holder 4 and the needle valve 5 are supported by the rotor shaft 61 in a rotatably suspended state. The upper end of the rotor shaft 61 is rotatably fitted into the guide 31 in the sealed case 3.
According to the above configuration, the magnetic rotor 62 and the rotor shaft 61 are rotated by the driving of the stepping motor 6, and the rotor shaft 61 is moved in the direction of the axis L by the screw feeding mechanism of the male screw portion 61a of the rotor shaft 61 and the female screw portion 21a of the support member 2, and then the valve member 5 is moved in the direction of the axis L to be close to or away from the valve seat 103, thereby opening and closing the valve port 103a, and controlling the flow rate of the refrigerant flowing from the first joint pipe 101 to the second joint pipe 102 or from the second joint pipe 102 to the first joint pipe 101, and the vertical rotational position of the magnetic rotor 62 is restricted by the rotation restricting mechanism 32.
The motor-operated valve 100 is a motor-operated valve in which a cylindrical metal valve housing 1 (valve body) having a needle valve 5 (valve member) that operates by rotation of a magnetic rotor 62 of a stepping motor 6 (motor portion) and a rotor shaft 61 built therein is fitted with a support member 2 that supports the rotor shaft 61 on an axis L and a cylindrical metal hermetic housing 3 that houses the magnetic rotor 62.
As shown in fig. 2, the fixing metal fitting 23 is formed by press working a stainless steel sheet metal, and integrally includes a cylindrical edge 231 centering on an axis L, and a flange portion 232 having a protruding surface protruding in a direction orthogonal to the axis L on an outer periphery of the edge 231, as shown in a partially enlarged view surrounded by a dashed-dotted circle in fig. 2, a collapsed surface a generated by the press working is formed on an end portion of an outer periphery of the flange portion 232 on a side opposite to the edge 231, and a burr surface B generated by the press working is formed on an end portion on a side opposite to the collapsed surface a in a state before welding of the fixing metal fitting 23.
As shown in fig. 1 and 3, the base portion 22 of the support member 2 is press-fitted into the opening end portion of the upper end of the valve housing 1, the fixing metal fitting 23 is disposed so that the edge 231 is on the valve chamber 1R side of the valve housing 1 in the base portion 22 of the support member 2, and is insert-molded together with the base portion 22, the valve housing 1 has a step portion 11 at the opening end portion of the base portion 22 of the fitting support member 2, the step portion 11 has a first annular surface 11a and a second annular surface 11b which are respectively positioned on the inner side and the outer side of a plane orthogonal to the axis L over the entire circumference around the axis L, the first annular surface 11a and the second annular surface 11b are different in position in the direction of the axis L, in this first embodiment, the second annular surface 11b is formed at a position lower than the first annular surface 11a in the direction of the axis L, in fig. 1 and 3, the vertical cross-sectional surfaces of the valve housing 1 and the sealing housing 3 are shown, but the valve housing 1 has a cylindrical shape symmetrical around the axis L in rotation.
The fixing metal fitting 23 of the support member 2 is disposed inside the second annular surface 11b, and the flange portion 232 of the fixing metal fitting 23 is in contact with the first annular surface 11 a. The entire circumference of the contact portion between the first annular surface 11a and the flange 232 is welded, and a melt-solidified portion P is formed on the entire circumference. Thereby, the support member 2 is fixed to the valve housing 1. Further, the lower end opening end of the sealed case 3 abuts on the second annular surface 11 b. The second annular surface 11b is welded to the entire circumference of the contact portion of the opening end of the sealed case 3, and a melt-solidified portion Q is formed on the entire circumference. Thereby, the hermetic case 3 is fixed to the valve housing 1.
In this way, when the support member 2 and the hermetic case 3 are assembled to the valve housing 1 (valve body), the position of the weld fixture 23 (flange portion 232) is higher than the position of the second annular surface 11b in the direction of the axis L, and therefore, the melt-solidified portion P does not interfere with the hermetic case 3 when the hermetic case 3 is welded, and the hermetic case 3 can be reliably welded.
The fixing metal fitting 23 is welded so that the burr surface portion B of the flange portion 232 abuts against the first annular surface 11a of the valve housing 1. If welding is attempted with the sagging surfaces in contact with each other, a gap occurs, and the weldability is unstable, so that a welding failure is likely to occur. However, in the embodiment, the burr surface portion B of the flange portion 232 comes into contact with the first annular surface 11a, and the gap is eliminated when the burr surface portion B comes into contact with the collapsed edge portion a, so that the welded shape is stabilized. Therefore, it is only necessary to weld the wires in contact with each other, and therefore, it is possible to eliminate fusion and insufficient strength at the time of welding, and to obtain stable weldability.
The fixing metal fitting 23 has the edge 231 only on one side, that is, the fixing metal fitting has the sagging surface portion a generated by press working of the sheet metal and has an asymmetrical shape with respect to the surface orthogonal to the axis L, and therefore, by making the metal mold structure in which the fixing metal fitting 23 is turned over and cannot enter at the time of insert molding of the support member 2, the burr surface is surely brought into contact with the first annular surface of the valve main body, and therefore, stable weldability is possible, and the operation of distinguishing the front surface and the back surface is not required, and the assembling property is improved.
Further, since the edge 231 of the fixing metal fitting 23 is positioned on the valve chamber 1R side of the valve housing 1 in the base portion 22 of the support member 2, even if the base portion 22 is press-fitted into the opening end portion of the valve housing 1, and stress is generated in the radial direction (inward) of the axis L from the opening end portion of the valve housing 1 by this pressure, the deformation of the inner diameter surface of the base portion 22 can be prevented by the reinforcing action of the edge 231.
Fig. 4 is a sectional view of an assembled portion of a valve housing, a support member, and a hermetic housing of the electric valve of the second embodiment. The second embodiment is different from the first embodiment in the opening end portion of the valve housing, the outer diameter of the fixing metal fitting, and the height of the hermetic housing. The other structures are the same as those of fig. 1, the same elements as those of the first embodiment and corresponding elements are denoted by the same reference numerals as those of fig. 1 to 3, and redundant description and illustration of the entire structure are omitted.
The valve housing 1 ' of the second embodiment has a step portion 12 at the opening end portion of the fitting base 22, the step portion 12 having a first annular surface 12a located inside and a second annular surface 12b located outside of a plane orthogonal to the axis L over the entire circumference around the axis L, the positions of the first annular surface 12a and the second annular surface 12b in the direction of the axis L being different from each other, the second annular surface 12b being formed at a higher position in the direction of the axis L than the first annular surface 12a, and the other main portions of the valve housing 1 ' and the hermetic housing 3 ' of the second embodiment, which are the same as those of the first embodiment, have rotational symmetry about the axis L.
The fixing metal fitting 23 ' of the support member 2 is disposed inside the second annular surface 12b, and the flange portion 232 ' of the fixing metal fitting 23 ' is in contact with the first annular surface 12 a. Then, the entire circumference of the abutting portion between the first annular surface 12a and the flange portion 232 'is welded, and a melt-solidified portion P' is formed on the entire circumference. Thereby, the support member 2 is fixed to the valve housing 1'. Further, the lower end opening end of the airtight housing 3' abuts on the second annular surface 12 b. Then, the entire circumference of the contact portion between the second annular surface 12b and the opening end of the sealed case 3 'is welded, and a melt-solidified portion Q' is formed on the entire circumference. Thereby, the hermetic case 3 'is fixed to the valve case 1'.
In this way, in the second embodiment, when the support member 2 and the hermetic case 3 are assembled to the valve housing 1 (valve body), the position of the weld-fixing metal fitting 23 '(the flange portion 232') is set to be lower than the position of the second annular surface 12b in the direction of the axis L, and therefore, when the hermetic case 3 'is welded, the melt-solidified portion P' does not interfere with the hermetic case 3 ', and the hermetic case 3' can be reliably welded.
Fig. 5 is a diagram showing a refrigeration cycle system according to an embodiment. In the figure, reference numeral 100 denotes an electrically operated valve constituting an expansion valve according to an embodiment of the present invention, reference numeral 200 denotes an outdoor heat exchanger mounted in an outdoor unit, reference numeral 300 denotes an indoor heat exchanger mounted in an indoor unit, reference numeral 400 denotes a flow path switching valve constituting a four-way valve, and reference numeral 500 denotes a compressor. The motor-operated valve 100, the outdoor heat exchanger 200, the indoor heat exchanger 300, the flow path switching valve 400, and the compressor 500 are connected by pipes as shown in the figure, and constitute a heat pump type refrigeration cycle. Note that the reservoir, the pressure sensor, the temperature sensor, and the like are not illustrated.
The flow path of the refrigeration cycle is switched by the flow path switching valve 400 to two flow paths, i.e., a cooling operation flow path and a heating operation flow path. During the cooling operation, as shown by solid arrows in the figure, the refrigerant compressed by the compressor 500 flows from the flow path switching valve 400 into the outdoor heat exchanger 200, the outdoor heat exchanger 200 functions as a condenser, the liquid refrigerant flowing out of the outdoor heat exchanger 200 flows into the indoor heat exchanger 300 via the electric valve 100, and the indoor heat exchanger 300 functions as an evaporator.
On the other hand, during the heating operation, as indicated by the broken line arrows in the figure, the refrigerant compressed by the compressor 500 circulates from the flow path switching valve 400 to the indoor heat exchanger 300, the motor-operated valve 100, the outdoor heat exchanger 200, the flow path switching valve 400, and the compressor 500 in this order, and the indoor heat exchanger 300 functions as a condenser and the outdoor heat exchanger 200 functions as an evaporator. The motor-operated valve 100 decompresses and expands the liquid refrigerant flowing from the outdoor heat exchanger 200 during the cooling operation or the liquid refrigerant flowing from the indoor heat exchanger 300 during the heating operation, and further controls the flow rate of the refrigerant.
In the description of the embodiment of the present invention, the welding of the fixing metal fitting and the annular surface of the body is full-circumference welding, but the welding is not limited to full-circumference welding, and may be partial welding.
Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configurations are not limited to these embodiments, and modifications of design and the like without departing from the scope of the present invention also belong to the present invention.
Claims (5)
1. An electrically operated valve in which a cylindrical metallic valve body is assembled with a support member that supports a magnetic rotor of a motor section and a rotor shaft on an axis, and a cylindrical metallic sealed housing that houses the magnetic rotor,
the above-mentioned electric valve is characterized in that,
the support member has a fixing metal fitting having a protruding surface protruding in a direction orthogonal to the axis line around the outer periphery of the axis line,
a first annular surface located inside a plane orthogonal to the axis and a second annular surface located outside the plane orthogonal to the axis are provided around the entire circumference of the axis at an opening end portion of the valve body, in which the support member is fitted, and the first annular surface and the second annular surface form a step portion so that positions in the direction of the axis are different from each other,
welding a portion of the valve body in contact with the first annular surface and the fixing metal fitting of the support member, and welding a portion of the valve body in contact with the second annular surface and the open end of the sealed case,
an upright surface connecting an outer edge of the first annular surface and an inner edge of the second annular surface in the axial direction opposes one of an end surface of the fixing metal piece at the outer edge thereof extending in the thickness direction of the fixing metal piece and an inner surface of the seal housing with a gap therebetween.
2. Electrically operated valve according to claim 1,
the fixing metal fitting has a sagging surface portion formed by press working of a sheet metal, and a back surface side of the sagging surface portion is brought into contact with the first annular surface and a portion in contact therewith is welded.
3. Electrically operated valve according to claim 2,
the fixing metal fitting has an asymmetrical shape with respect to a plane orthogonal to the axis.
4. Electrically operated valve according to claim 3,
the support member has a resin base portion press-fitted into the opening end portion of the valve main body,
the fixing metal fitting has a cylindrical edge centered on the axis, and a flange portion having a protruding surface protruding in a direction orthogonal to the axis L on the outer periphery of the edge,
the fixing metal fitting is disposed in the base portion such that the edge is located inside the valve body, and is insert-molded together with the base portion.
5. A refrigeration cycle system comprises a compressor, a condenser, an expansion valve and an evaporator,
the above-described refrigeration cycle system is characterized in that,
use of an electrically operated valve according to any of claims 1 to 4 as the expansion valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017010882A JP6753789B2 (en) | 2017-01-25 | 2017-01-25 | Solenoid valve and refrigeration cycle system |
| JP2017-010882 | 2017-01-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108343750A CN108343750A (en) | 2018-07-31 |
| CN108343750B true CN108343750B (en) | 2020-07-24 |
Family
ID=62963424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711474527.8A Active CN108343750B (en) | 2017-01-25 | 2017-12-29 | Electric valve and refrigeration cycle system |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6753789B2 (en) |
| CN (1) | CN108343750B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020034423A1 (en) * | 2018-08-17 | 2020-02-20 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108343750A (en) | 2018-07-31 |
| JP2018119595A (en) | 2018-08-02 |
| JP6753789B2 (en) | 2020-09-09 |
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