Motor-operated valve

Abstract

The motor-operated valve includes a valve seat unit (10) and a nut unit (40). The valve seat unit (10) includes a first valve seat member (101) and a second valve seat member (102). The first valve seat member (101) includes a side wall portion (1011) and a top wall portion (1012). The top wall portion (1012) extends from the side wall portion (1011) toward the center of the motor-operated valve. The side wall portion (1011) is fixed to the second valve seat member (102). The nut unit 40 includes a nut body 401 having an outer edge segment that is drilled into and engaged with the engagement hole 1013, and the nut unit 40 is fixedly connected to the top wall 1012. The outer edge segment of the motor-operated valve is drilled into and engaged with the engagement hole 1013, and when the nut unit 40 and the valve seat unit 10 are assembled, the engagement hole 1013 can provide a certain guiding effect for the outer edge segment of the nut unit 40, and the valve seat unit 10 and the nut unit 40 have good coaxiality.

Description

[Technical field]

[0001] This application is 1. The application was submitted to the China Patent Office on July 30, 2021, with application number 202110871629.3 and the invention name "motor-operated valve"; 2. The invention was submitted to the China Patent Office on July 30, 2021, with application number 202110874162.8 and the name of the invention is "motor-operated valve"; 3. The invention was submitted to the China Patent Office on July 30, 2021, with application number 202110874122.3 and the name of the invention is "motor-operated valve"; 4. This application claims priority to four Chinese patent applications filed with the China Patent Office on October 29, 2021, bearing application number 202111274091.4 and entitled "Motor-operated valve", the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the technical field of refrigeration control, and in particular to motorized valves. [Background technology]

[0003] Generally, air conditioners, refrigerators, heat pump water heaters, and various cooling and heating appliances use motor-operated valves to adjust the flow rate of fluids.

[0004] Generally, an electric valve includes a valve seat unit, a nut unit, and a valve needle screw unit, where the valve seat unit and the nut unit are fixedly connected, and the valve needle screw unit and the nut unit are threadedly engaged. When the valve needle screw unit performs a rotational movement, the valve needle performs a displacement movement along the axial direction to approach or move away from the valve port. Summary of the Invention [Problem to be solved by the invention]

[0005] If the concentricity between the valve body seat and the nut is poor, the valve port will not be tightly sealed or eccentric wear will easily occur, reducing the reliability of the operation of the motor-operated valve and shortening the service life of the motor-operated valve.

[0006] SUMMARY OF THE PRESENT EMBODIMENT It is an object of the present invention to provide a motorized valve. [Means for solving the problem]

[0007] The present invention is an electric valve including a valve seat unit and a nut unit, the valve seat unit including a first valve seat member and a second valve seat member, the first valve seat member including a side wall portion and a top wall portion, the top wall portion extending from the side wall portion toward the center of the electric valve, the side wall portion fixedly connected to the second valve seat member, the top wall portion including an engagement hole portion penetrating the top wall portion, the nut unit including a nut main body portion including an outer edge segment, the outer edge segment being drilled into and engaged with the engagement hole portion, and the nut unit fixedly connected to the top wall portion. Effect of the Invention

[0008] The outer edge segment in the electric valve of the present invention is drilled into and engaged with the engagement hole portion, and when the nut unit and the valve seat unit are assembled, the engagement hole portion can provide a certain guiding effect for the outer edge segment of the nut unit, and the valve seat unit and the nut unit have good coaxiality. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a cross-sectional view of the motor-operated valve of the present invention. [Diagram 2] FIG. 2 is a structural diagram of a valve seat member of the motor-operated valve of the present invention. [Figure 3a] 2 is a structural diagram of a valve body rotor unit of the motor-operated valve of the present invention. FIG. [Figure 3b] FIG. 3b is a locally enlarged cross-sectional view of FIG. 3a. [Figure 4] 1 is a cross-sectional view of a valve body in the motor-operated valve of the present invention when the valve body rotor unit is about to open excessively to a critical point. [Diagram 5] 1 is a cross-sectional view of a valve body when a valve body rotor unit in the motor-operated valve of the present invention is excessively opened until a screw pair is unscrewed. [Figure 6] FIG. 4 is a structural diagram of a valve disc rotor unit according to a second embodiment of the present invention. [Figure 7] FIG. 11 is a structural diagram of a valve disc rotor unit according to a third embodiment of the present invention. [Figure 8] FIG. 11 is a structural diagram of a valve disc rotor unit according to a fourth embodiment of the present invention. [Figure 9] FIG. 11 is a structural diagram of a valve disc rotor unit according to a fifth embodiment of the present invention. [Figure 10] FIG. 13 is a structural diagram of a valve disc rotor unit according to a sixth embodiment of the present invention. [Figure 11] FIG. 13 is a structural diagram of a valve disc rotor unit according to a seventh embodiment of the present invention. [Figure 12] FIG. 13 is a partial structural view of a valve body rotor unit according to an eighth embodiment of the present invention. [Figure 13] FIG. 13 is a cross-sectional view of a valve seat unit according to a ninth embodiment of the present invention. [Figure 14] FIG. 23 is a cross-sectional view of a motor-operated valve according to a tenth embodiment of the present invention. [Figure 15] FIG. 17 is a structural diagram of a valve seat unit of a motor-operated valve according to the tenth embodiment of the present invention. [Figure 16] 13 is a cross-sectional view of the valve body of the motor-operated valve according to the tenth embodiment of the present invention when the valve body rotor unit is about to open excessively to the critical point. [Figure 17] 10th embodiment of the motor-operated valve rotor unit of the present invention is a cross-sectional view of the valve body when it is excessively opened until the screw pair is unscrewed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In order to make the invention easier to understand, the invention will now be described in more detail with reference to the following figures and examples.

[0011] Referring to Figures 1 to 5, Figure 1 is a cross-sectional view of the motor-operated valve of the present invention, Figure 2 is a structural diagram of the valve seat unit 10 of the motor-operated valve of the present invention, Figure 3a is a structural diagram of the valve body rotor unit of the motor-operated valve of the present invention, Figure 3b is a locally enlarged cross-sectional view of Figure 3a, Figure 4 is a cross-sectional view of the valve body when the valve body rotor unit in the motor-operated valve of the present invention opens excessively close to the critical point, and Figure 5 is a cross-sectional view of the valve body when the valve body rotor unit in the motor-operated valve of the present invention opens excessively until the screw pair is unscrewed.

[0012] In the specific embodiment of FIG. 1 and FIG. 2, the motor-operated valve of the present invention includes a valve body and a coil 50, and the coil 50 is fitted onto the valve body. The valve body includes a valve seat unit 10, a valve disc rotor unit 20, a housing 30 and a nut unit 40. The coil 50 of the stator in the motor-operated valve is connected to a drive controller, which transmits a pulse drive signal to the coil 50 after being energized, and the coil 50 generates a changing magnetic field to drive the valve body rotor unit 20 of the motor-operated valve to rotate in the forward or reverse direction. The valve disc rotor unit 20 includes a valve stem unit 201 . In this embodiment, the stem unit 201 includes a stem 2011 provided with a male thread portion 201a. The nut unit 40 includes a nut body portion 401 . A female thread portion 40b is provided in the inner bore portion of the nut main body portion 401, and the valve shaft 2011 and the nut main body portion 401 are threadedly engaged (hereinafter referred to as screwing).When the valve body rotor unit 20 performs a rotational movement, the valve shaft 2011 performs a displacement movement along the axial direction, driving the valve body 202 to move closer to or away from the valve opening portion 10a.

[0013] In this embodiment, the valve seat unit 10 includes a first valve seat member 101 and a second valve seat member 102 . The first valve seat member 101 includes a side wall portion 1011 and a top wall portion 1012 . The side wall portion 1011 has a generally hollow cylindrical shape, the second valve seat member 102 is located at one end of the first valve seat member 101, and the top wall portion 1012 extends from the side wall portion 1011 toward the center of the motor-operated valve. In this embodiment, the top wall 1012 and the first valve seat member 101 are integrally formed and are manufactured by a process such as, for example, sheet drawing or bar forging. The lower end opening side of the side wall portion 1011 is fixedly connected to the second valve seat member 102.

[0014] Specifically, the second valve seat member 102 in this embodiment includes an insertion portion 1021 having a substantially vertical shape and a limiting portion 1022 having a substantially horizontal shape. This limiting portion 1022 is located circumferentially outside the insertion portion 1021, and when assembling and fixing the first valve seat member 101 and the second valve seat member 102, the insertion portion 1021 is first attached from the opening side of the first valve seat member 101 so as to engage with the inner surface of the side wall portion 1011. In this case, there is an overlapping area between the orthogonal projection of the insertion portion 1021 along the plane on which the longitudinal cross section of the electric valve is located and the orthogonal projection of the side wall portion 1011 along the same plane, and in the process of attaching the insertion portion 1021 to the side wall portion 1011, the side wall portion 1011 can provide a certain guide for the insertion portion 1021 and ensure coaxiality between the axis of the first valve seat member 101 and the axis of the second valve seat member 102. In addition, there is an overlapping area between the orthogonal projection of the side wall portion 1011 along the plane on which the cross section of the motor-operated valve is located and the orthogonal projection of the limiting portion 1022 along the same plane, and when the insertion portion 1021 is attached to the side wall portion 1011 to a predetermined extent, the limiting portion 1022 can abut against the opening end of the side wall portion 1011. This limits the insertion portion 1021 from being continuously attached to the side wall portion 1011, defines the relative axial positions of the first valve seat member 101 and the second valve seat member 102, and fixedly connects the first valve seat member 101 and the second valve seat member 102, for example, by welding.

[0015] Moreover, the second valve seat member 102 in this embodiment includes a valve opening portion 10a, and the valve seat unit 10 further includes a first inlet / outlet passage 10d and a second inlet / outlet passage 10e. The valve orifice portion 10a can be connected to the first inlet / outlet passage 10d and the second inlet / outlet passage 10e, thereby allowing a fluid medium (e.g., a refrigerant) to pass through. A side wall connection portion 10111 is provided on the side wall portion 1011, and the first connecting pipe portion 103 is fixedly connected to the side wall connection portion 10111 by a method such as welding. An engagement connection portion 1023 is provided on the second valve seat member 102, and this engagement connection portion 1023 is fixedly connected to the second connecting pipe portion 104. The second connecting pipe portion 104 is connected to the valve orifice portion 10a (without taking into consideration the valve body 202). As an inflow or outflow passage for the fluid medium of the electric valve, the first connecting pipe portion 103 and the second connecting pipe portion 104 are generally connected to a system pipe line when installed in a cooling or heating system such as an air conditioner.

[0016] With the above arrangement, a valve chamber 10b is formed in the valve seat unit 10, and the volume of the valve chamber 10b can be easily increased compared to a valve seat made by turning a bar stock in the background art, thereby improving the stability of the fluid pressure and reducing fluid noise.

[0017] Referring to FIG. 2, combining FIG. 1, the valve seat unit 10 in this embodiment further includes an engagement hole portion 10131 penetrating the upper and lower surfaces of the top wall portion 1012, and the nut body portion 401 includes an outer edge segment 4011. When assembling this nut unit 40 and the valve seat unit 10, the outer edge segment 4011 of the nut main body 401 is inserted into the engagement hole 10131. In this case, the nut unit 40 is drilled into the engagement hole 10131. When the nut unit 40 is attached to the valve seat unit, the nut unit 40 is guided by the engagement hole 10131, and the axis of the nut unit 40 and the axis of the valve seat unit 10 are well concentric. Then, when the valve body 202 approaches or moves away from the valve orifice 10a, the skew of the valve body 202 with respect to the axis of the electric valve is small.

[0018] The nut body 401 and the engagement hole 10131 can be fitted using a tight fit, intermediate fit, or clearance fit. In this embodiment, the nut body 401 and the engagement hole 10131 are fitted using a tight fit method. When the nut body 401 and the engagement hole 10131 are fitted with a gap, it is appropriate to control the gap on one side between the outer edge segment 4011 of the nut body 401 and the engagement hole 10131 to within 0.15 mm.

[0019] Referring to FIG. 1, the nut unit 40 in this embodiment further includes a nut connecting portion 402 . The nut connecting portion 402 is manufactured from a metal material and is injection molded as a whole together with the nut body portion 401 as an insert. The nut connection portion 402 and the top wall portion 1012 are fixed and connected together by a method such as welding or bonding with an adhesive.

[0020] Specifically, in a plane on which the cross section of the motor-operated valve is located, there is an overlapping area between the orthogonal projection of the nut connection portion 402 along the plane and the orthogonal projection of the top wall portion 1012 along the plane. As a result, when the nut main body portion 401 is attached to the engagement hole portion 10131 to a predetermined extent, the nut connection portion 402 becomes able to abut against the top wall portion 1012, restricting the nut main body portion 401 from being further attached to the engagement hole portion 10131, limiting the relative axial positions of the nut unit 40 and the valve seat unit 10, and fixing the nut connection portion 402 and the top wall portion 1012, thereby completing the assembly of the nut unit 40 and the valve seat unit 10.

[0021] At least a portion of the lower surface of the nut connection portion 402 is planar, and at least a portion of the upper surface of the top wall portion 1012 is also planar. The planar portion of the underside of the nut connection portion 402 and the planar portion of the upper surface of the top wall portion 1012 are engaged with each other, and the engagement described here is not limited to bonding the entire planar portion of the underside of the nut connection portion 402 with the entire planar portion of the upper surface of the top wall portion 1012. In this embodiment, the underside of the nut connection portion 402 is planar, and the upper surface of the top wall portion 1012 is also planar. Therefore, after the nut unit 40 and the valve seat unit 10 are assembled and fixed, the underside of the nut connection portion 402 and the upper surface of the top wall portion 1012 are engaged with each other and then fixed and connected, and the axis of the nut unit 40 has a good perpendicularity to the horizontal direction. For this reason, the nut unit 40 is less likely to skew relative to the axial direction of the valve seat unit 10, and when the outer edge segment 4011 of the nut main body 401 is attached to the engagement hole portion 10131, the engagement hole portion 10131 also has the effect of increasing the perpendicularity between the axis of the nut unit 40 and the horizontal direction, so that the axis of the nut unit 40 in this embodiment and the axis of the valve seat unit 10 are well concentric.

[0022] Referring to FIG. 2, and combining FIG. 1, the motorized valve of the present invention further includes a housing 30. As shown in FIG. The housing 30 is a thin-walled member having an enclosure shape, and its lower end opening side is hermetically welded to the valve seat unit 10 to form an accommodation chamber that accommodates the upper half of the nut main body portion 401 and the main body portion of the valve body rotor unit 20. Specifically, in this embodiment, the side wall portion 1011 further includes a step portion 10112 . This step portion 10112 is located approximately on the outer side in the circumferential direction of the side wall portion 1011, has an annular stepped shape, and includes a horizontal step portion 101121 and a vertical step portion 101122. Furthermore, this step horizontal portion 101121 is the portion of step portion 10112 that is more horizontal, and step vertical portion 101122 is the portion of step portion 10112 that is more vertical, and in this embodiment, step horizontal portion 101121 is horizontal, and step vertical portion 101122 is vertical.

[0023] When assembling the valve seat unit 10 and the housing 30, the housing 30 is gradually fitted along the stepped vertical portion 101122, and during the process of the housing 30 being gradually fitted along the stepped vertical portion 101122, the stepped vertical portion 101122 can exert a certain guiding effect on the housing 30. As a result, the axis of the housing 30 is less likely to be skewed relative to the axis of the valve seat unit 10, the axis of the valve seat unit 10 and the axis of the housing 30 are well concentric, and there is an overlapping area between the orthogonal projection of the housing 30 along the plane in which the cross section of the electric valve is located and the orthogonal projection of the step horizontal portion 101121 along the same plane. As a result, when the opening end of the housing 30 is gradually fitted along the step vertical portion 101122 to a predetermined extent, it can abut against the step horizontal portion 101121, restricting the housing 30 from being fitted further and limiting the relative axial position between the housing 30 and the valve seat unit 10. In this embodiment, the step horizontal portion 101121 is horizontal, and the lower end opening side of the housing 30 is also horizontal, so that when the two are engaged, the housing 30 is also less likely to skew relative to the valve seat unit 10, ensuring concentricity between the axis of the housing 30 and the axis of the valve seat unit 10.

[0024] In this manner, the motor-operated valve generally defines two chambers: a receiving chamber located above the nut connection portion 402 and a valve chamber 10 b located below the nut connection portion 402 .

[0025] The valve seat unit 10 in this embodiment further includes a balance hole portion 1014 penetrating the upper and lower surfaces of the top wall portion 1012 .

[0026] With the above arrangement, the balance hole 1014 quickly balances the pressure in the storage chamber and the pressure in the valve chamber 10b, reducing noise caused by an imbalance between the pressure in the storage chamber and the pressure in the valve chamber 10b or a slow balancing time.

[0027] Here, the balance hole portion 1014 in the present invention is not limited to being the only balance passage as a means for balancing the pressure in the storage chamber and the pressure in the valve chamber 10b, and the balance hole portion 1014 in the present invention may be one of the balance passages in the motor-operated valve.

[0028] Since both the balance hole portions 1014 and the engagement hole portions 10131 penetrate the upper and lower surfaces of the top wall portion 1012, the balance hole portions 1014 and the engagement hole portions 10131 may be arranged so as not to overlap, or a portion of the balance hole portions 1014 and a portion of the engagement hole portions 10131 may be arranged so as to overlap.Of course, when the number of balance holes 1014 is two or more, some of the balance holes 1014 may not overlap with the engagement hole portions 10131, and some of the balance holes 1014 may be arranged so as to overlap with a portion of the engagement hole portions 10131. Here, "overlapped" refers to a hole in which the balance hole portion 1014 and the engagement hole portion 10131 are combined.

[0029] In addition, the second valve seat member 102 in this embodiment further includes a second valve seat main body portion 102 a and a blocking portion 1024 . In this embodiment, the blocking portion 1024 has a substantially annular structure and is formed to extend axially along the upper surface of the second valve seat main body portion 102a. During the process of installing the first connecting pipe portion 103 and the first valve seat member 101, first, the first valve seat member 101 and the second valve seat member 102 are fixed and connected, and the first connecting pipe portion 103 is inserted through the side wall connecting hole portion 10111. When the first connecting pipe portion 103 enters the side wall connecting hole portion 10111 to a predetermined extent, the blocking portion 1024 becomes able to abut against the first connecting pipe portion 103, and further restricts the first connecting pipe portion 103 from entering the side wall connecting hole portion 10111. Therefore, the blocking portion 1024 can control the insertion depth of the first connecting pipe portion 103, and the insertion of the first connecting pipe portion 103 of each product into the side wall connecting hole portion 10111 is consistent.

[0030] Specifically, the insertion direction of the first connecting pipe portion 103 into the side wall connection hole portion 10111 is set to the insertion direction X, a plane perpendicular to the insertion direction X exists, and there is an overlapping region between the orthogonal projection of the blocking portion 1024 along the plane and the orthogonal projection of the first connecting pipe portion 103 along the plane.

[0031] In this case, when the first connecting pipe section 103 is inserted into the side wall connecting hole section 10111 to a predetermined extent, the blocking section 1024 becomes able to abut against the first connecting pipe section 103 and controls the insertion depth of the first connecting pipe section 103.

[0032] 3a and 3b, the valve disc rotor unit 20 further includes a rotor 203 and a valve disc 202, the rotor 203 has magnetic poles in the circumferential direction, and the valve disc 202 is inserted into the central through-hole of the valve shaft 2011. In addition, the valve body rotor unit 20 further includes an elastic part 204 provided in the central through hole of the valve shaft 2011, and a push rod 205 provided at the upper end of the elastic part 204, and the valve shaft unit 201 further includes a bush 2012 fixedly connected to the upper end of the valve shaft 2011, and in this embodiment, the elastic part 204 is a spring.

[0033] Referring to Figures 1, 3a and 3b, the nut main body 401 has a fixed stopper portion 40a protruding from the annular base, and is capable of engaging with a movable stopper portion 201b provided on the valve body rotor unit 20, thereby forming a stopper mechanism at the lower end of the stroke of the electric valve. That is, when the valve body rotor unit 20 moves downward relative to the valve seat unit 10 to a predetermined extent, the movable stopper portion 201b becomes able to abut against the fixed stopper portion 40a, restricting the valve body rotor unit 20 from further rotating relative to the valve seat unit 10 and further restricting the valve body rotor unit 20 from moving downward continuously in the axial direction, thereby controlling the downward movement stroke of the valve body rotor unit 20.

[0034] When the coil 50 of the motor-operated valve receives a drive pulse signal and generates a changing magnetic field, the field magnet of the rotor 203 in the valve body rotates. In this embodiment, the valve shaft 2011 is fixedly connected to the rotor 203, so that it rotates synchronously with the rotor 203, and the spiral feed mechanism of the valve shaft 2011 and the nut body 401 converts the rotational motion of the rotor 203 into axial movement, and drives the valve body 202 so that the valve body head 202a approaches or moves away from the valve port 10a, thereby realizing the linear opening / closing / adjustment function of the motor-operated valve.

[0035] The valve body rotor unit 20 of the motor-operated valve includes a rotor 203 having magnetic poles attached in the circumferential direction, a valve shaft 2011 fixedly connected to the rotor 203, a valve body 202 inserted into a central through hole of the valve shaft 2011, an elastic part 204 provided in an inner hole cavity of the valve shaft 2011, a push rod 205 provided at the upper end of the elastic part 204, and a bush 2012 fixedly connected to the upper end of the valve shaft 2011.

[0036] The elastic part 204 in the motor-operated valve of the present invention is disposed in the inner cavity of the valve shaft 2011, and restricts the valve shaft 2011 in both the circumferential direction and the upward and downward directions. Therefore, the elastic part 204 does not basically wobble up and down, and therefore wobbling noise is basically not generated, and the risk of the elastic part 204 falling off or being displaced, which is ineffective, is avoided.

[0037] 3a and 3b, the valve stem 2011 in this embodiment includes a hole penetrating upward and downward, and the inner wall of the hole roughly forms a valve stem inner wall portion 2015, and the inner diameter of the valve stem inner wall portion 2015 is not uniform in the axial direction of the valve stem 2011. Specifically, the stem inner wall portion 2015 includes a first stem inner wall portion 20151 , a stem contact portion 20152 , and a second stem inner wall portion 20153 . The first valve shaft inner wall portion 20151 is located above the second valve shaft inner wall portion 20153, and in a plane on which the cross section of the valve shaft 2011 exists, the orthogonal projection of the first valve shaft inner wall portion 20151 along said plane (the orthogonal projection is a closed line or annular surface) is located outside the orthogonal projection of the second valve shaft inner wall portion 20153 along said plane (the orthogonal projection is a closed line or annular surface). In order to facilitate processing and manufacturing, the cross sections of the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 are generally both formed to be circular. In this case, the diameter of the first stem inner wall portion 20151 is larger than the diameter of the second stem inner wall portion 20153. In this embodiment, the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 have the same diameter in the height direction, so that the orthogonal projection of the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153 along the plane on which the cross section of the valve shaft 2011 is located is circular.

[0038] In addition, the stem abutment portion 20152 has an extending distance in the horizontal direction, the outer edge of the stem abutment portion 20152 intersects with the first stem inner wall portion 20151, and the inner edge of the stem abutment portion 20152 intersects with the second stem inner wall portion 20153, and when the cross sections of the first stem inner wall portion 20151 and the second stem inner wall portion 20153 are both configured to be circular, the orthogonal projection of the stem abutment portion 20152 along the plane in which the cross section of the stem 2011 is located presents a circular ring shape. In this embodiment, the stem abutment portion 20152 is horizontal, of course, the stem abutment portion 20152 may be installed on an imperfect plane, for example, in the direction away from the center of the stem 2011, the stem abutment portion 20152 gradually extends upward or downward, where the stem abutment portion 20152 only needs to have an extending distance in the horizontal direction.

[0039] 3a and 3b, the valve stem 2011 in this embodiment includes an outer edge portion 2016, and the outer edge portion 2016 includes a first outer edge portion 20161 and a second outer edge portion 20162. The first outer edge portion 20161 is located above the second outer edge portion 20162 and is a plane on which the cross section of the valve shaft 2011 is located. The orthogonal projection of the first outer edge portion 20161 along this plane is located outside the orthogonal projection of the second outer edge portion 20162 along this plane. In order to facilitate processing, the cross sections of the first outer edge portion 20161 and the second outer edge portion 20162 are both circular. A rotor fixing portion 201c is provided on the portion of the first outer edge portion 20161 located at the valve shaft 2011. The rotor 203 and the rotor fixing portion 201c are fixed to each other by direct or indirect welding, crimping, injection connection using a magnetic plastic material, bonding with an adhesive, or other methods. In this embodiment, the connecting part is injection-connected to the magnetic plastic material as an insert, and then fixed and connected to the valve shaft 2011 by welding. If the rotor 203 and the valve shaft 2011 are directly connected, the valve shaft 2011 may be injection-connected to the magnetic plastic material as an insert.

[0040] A male threaded portion 201a is provided at the location of the second outer edge portion 20162 corresponding to the valve shaft 2011, and the male threaded portion 201a is combined with a female threaded portion 40b provided in the inner hole portion of the nut main body portion 401 to form the screw feed mechanism (screw pair) of the electric valve.

[0041] In this embodiment, the valve shaft unit 201 further includes a bushing 2012, which is located within the first valve shaft inner wall portion 20151 and is fixed and connected to the valve shaft 2011 by a method such as press-fitting or welding. The bushing 2012 further includes a bushing hole portion 20121, which penetrates the upper and lower surfaces of the bushing 2012.

[0042] Continuing to refer to Figures 3a and 3b, the valve body 202 in this embodiment is drilled into the valve shaft 2011 (a part of the valve body 202 is located within the valve shaft inner wall portion 2015), and the valve body 202 has a stepped shaft shape and includes a valve body head portion 202a, which is located at approximately the lower end of the valve body 202, and the tip shape of the valve body 202 is related to the required flow rate adjustment curve of the motor-operated valve, and the valve body 202 further includes a valve body abutment portion 202b. This valve body abutment portion 202b is located near the upper end of the valve body 202, and in the plane in which the cross-section of the valve body 202 is located, the orthogonal projection of the valve body head 202a along the plane is located within the orthogonal projection of the valve body abutment portion 202b along the plane. In this embodiment, the cross sections of the valve head 202a and the valve contact portion 202b are both circular, so that the diameter of the valve contact portion 202b is larger than the diameter of the valve head 202a. In this embodiment, the valve body 202 is inserted into the inner chamber of the valve shaft 2011 in a top-to-bottom direction, and its valve body abutment portion 202b is abuttable against the valve shaft abutment portion 20152, and its valve body head portion 202a protrudes from the second valve shaft inner wall portion 20153. On the plane on which the cross section of the valve body 202 exists, there is an overlapping region between the orthogonal projection of the valve body contact portion 202b along the plane and the orthogonal projection of the valve shaft contact portion 20152 along the plane. Therefore, the valve body abutment portion 202b is able to abut against the valve shaft abutment portion 20152 (of course, if a member such as a washer is provided between the valve shaft abutment portion 20152 and the valve body abutment portion 202b to prevent direct abutment, the projection relationship between the valve body abutment portion 202b and the valve shaft abutment portion 20152 does not have to satisfy the above relationship). In this embodiment, the outer edge of the valve body abutment portion 202b, the cross section of the first valve shaft inner wall portion 20151, and the cross section of the second valve shaft inner wall portion 20153 are all circular, the diameter of the valve body abutment portion 202b is slightly smaller than the diameter of the first valve shaft inner wall portion 20151, the diameter of the valve body abutment portion 202b is larger than the diameter of the second valve shaft inner wall portion 20153, and the diameter of the largest point of the valve body head 202a is slightly smaller than the diameter of the second valve shaft inner wall portion 20153, so that the valve body 202 can be supported by the valve shaft abutment portion 20152 of the valve shaft 2011.

[0043] In addition, the valve body rotor unit 20 of the motor-operated valve of this embodiment further includes an elastic member 204, which is designed as a cylindrical coil spring and is located within the first valve shaft inner wall portion 20151.

[0044] Continuing to refer to FIG. 3 a and FIG. 3 b , the valve body rotor unit 20 of the motor-operated valve provided by the present invention further includes a push rod 205 , which includes a push rod body portion 2051 and a push rod abutment portion 2052 . In this embodiment, the push rod abutment portion 2052 has a structure formed by extending generally along the circumferential direction of the push rod main body portion 2051 and is located below the bush 2012. The push rod main body portion 2051 extends from the bush hole portion 20121 to the outside of the valve shaft unit 201, and the lower end portion of the elastic part 204 abuts against the valve body 202 and the upper end portion thereof abuts against the push rod abutment portion 2052 of the push rod 205.

[0045] 3a and 3b, in the plane in which the cross-section of the valve body rotor unit 20 is located, there is an overlapping area between the orthogonal projection of the bush hole portion 20121 along that plane and the orthogonal projection of the push rod abutment portion 2052 along that plane, and the orthogonal projection of the push rod main body portion 2051 along that plane is located within the orthogonal projection of the bush hole portion 20121 along that plane. For this reason, the push rod abutment portion 2052 cannot come out of the bush hole portion 20121 from the bottom up, and the push rod main body portion 2051 can come out of the bush hole portion 20121 (of course, if a member such as a washer is provided between the bush 2012 and the push rod abutment portion 2052 to prevent direct abutment, the projection relationship between the bush hole portion 20121 and the push rod abutment portion 2052 does not have to satisfy the above relationship). In this embodiment, the outer edge of the push rod main body portion 2051, the outer edge of the push rod abutment portion 2052 and the cross section of the bush hole portion 20121 are all circular, the diameter of the push rod abutment portion 2052 is larger than the diameter of the bush hole portion 20121, and the diameter of the push rod main body portion 2051 is smaller than the diameter of the bush hole portion 20121. The upper end of the push rod main body portion 2051 protrudes from above the bush hole portion 20121, and the push rod abutment portion 2052 receives an upward elastic tightening force from the elastic part 204 and abuts against the bush 2012 (this includes direct abutment and indirect abutment; for example, if a member such as a washer is provided between the bush 2012 and the push rod abutment portion 2052, the push rod abutment portion 2052 and the bush 2012 will indirectly abut). After the bushing 2012 and the valve stem 2011 are fixedly connected, the elastic element 204 is in a compressed state.

[0046] The stem unit 201 of the present invention includes an abutment portion 20b that abuts against the push rod abutment portion 2052, and in this embodiment, the bush 2012 abuts against the push rod abutment portion 2052 and therefore includes the abutment portion 20b.

[0047] 4, which is a cross-sectional view of the valve body when the valve rotor member 20 in the motor-operated valve of the present invention is about to over-open to a critical point. The valve disc rotor unit 20 in FIG. 4 is about to be in an excessively open state (excessively open: a state in which the valve disc rotor unit 20 opens upward to a point where it exceeds a predetermined upper limit stroke). The valve body head 202a in FIG. 4 is located at a position away from the valve port 10a. In this case, a certain length (the length indicated by the symbol L in the drawing) of the male thread portion 201a of the valve shaft 2011 is still in a threaded state with the female thread portion 40b of the nut body portion 401, and at this time, the push rod body portion 2051 just comes into contact with the ceiling portion of the housing 30.

[0048] 5 is a cross-sectional view of the valve body when the valve rotor unit in the motor-operated valve of the present invention is excessively opened (the screw pair is unscrewed). 5 continues to move upward relative to the position of FIG. 4, the height of the stroke is L. In this case, the movable threaded portion 201a of the valve shaft 2011 and the fixed threaded portion 10b of the nut body portion 401 are just unscrewed, and the amount of further compression of the elastic part 204 relative to the state of FIG. 4 is L. The tip of the push rod body portion 2051 of the push rod 205 is firmly abutted against the inner wall of the housing 30, and the downward elastic force of the elastic part 204 is finally transmitted to and acts on the valve shaft unit 201, that is, the valve shaft unit 201 is subjected to the downward elastic load of the elastic part 204. When the valve disc rotor unit 20 continues to rotate in the excessively opening direction, in this case, the screw pair has already been unscrewed, so the valve disc rotor unit 20 does not continue to rise relative to the nut body portion 401. When the valve disc rotor unit 20 receives the driving force of the coil 50 and rotates downward in the valve closing direction, the valve shaft 2011 receives the downward elastic fastening force of the elastic part 204, so that the male threaded portion 201a and the female threaded portion 40b return to their original position and screw together again, causing the valve disc rotor unit 20 to rotate and move downward.

[0049] The valve stem unit 201 in the present invention includes a passage portion 20c, and the motor-operated valve in this embodiment includes a load portion 20d. The passage portion 20c allows the push rod body portion 2051 of the push rod 205 to extend above the valve stem unit 201 and come into contact with the load portion 20d. The push rod main body portion 2051 in this embodiment can come out of the bushing hole portion 20121 and come into contact with the housing 30, so that the bushing hole portion 20121 in this embodiment includes the passage portion 20c, and the housing 30 includes the load portion 20d.

[0050] FIG. 6 is a structural diagram of a valve disc rotor unit according to a second embodiment of the present invention. In contrast to the valve disc rotor unit 20 of the first embodiment shown in Figs. 3a and 3b, in this embodiment, the valve disc 202 of the first embodiment is designed as a separate unit. The valve body 202 in this embodiment includes a valve body main body 2021 and a valve body sleeve 2022. The valve body sleeve 2022 includes a valve body sleeve hole 20221. The valve body sleeve hole 20221 penetrates the upper and lower surfaces of the valve body sleeve 2022. The upper end of the valve body main body 2021 penetrates the valve body sleeve hole 20221. The valve body main body 2021 and the valve body sleeve 2022 are fixed and connected by a method such as pressing, welding, or adhesive.

[0051] According to the valve body 202 of this embodiment, the diameter of the valve body head 202 a is set to be larger than the diameter of the second valve shaft inner wall portion 20153 . When the diameter of the valve body head 202a is larger than the diameter of the second valve shaft inner wall portion 20153, the valve body 202 is inserted from bottom to top into the central through hole of the valve shaft 2011, and then the valve body sleeve 2022 is fitted from top to bottom and fixed to the valve body main body portion 2021, and the elastic part 204 is abutted against the valve body sleeve 2022. The valve element sleeve 2022 in this embodiment includes a valve element abutment portion 202 b that is abuttable against the valve shaft abutment portion 20152 . In this embodiment, the lower end of the elastic part 204 abuts against the upper part of the valve body sleeve 2022 .

[0052] In addition, in this embodiment, the valve body main body 2021 protrudes from the valve body sleeve hole 20221 and is located within the elastic part 204. When the lower end of this elastic part 204 is about to shift radially, the part of the valve body main body 2021 protruding from the valve body sleeve hole 20221 can limit the radial shift of the elastic part 204, and the elastic part 204 is more stable when the electric valve is operating. The structural solutions of other parts in this embodiment are the same or similar to those in the first embodiment.

[0053] Of course, the valve disc sleeve hole 20221 may adopt the form of a blind hole, that is, the valve disc main body 2021 is fixedly connected to the valve disc sleeve 2022, but does not protrude from above the valve disc sleeve hole 20221, that is, the valve disc sleeve hole 20221 is not limited to the form of a through hole, or the valve disc sleeve hole 20221 is in the form of a through hole, but the valve disc main body 2021 does not protrude from above the valve disc sleeve hole 20221.

[0054] FIG. 7 is a structural diagram of a valve disc rotor unit according to a third embodiment of the present invention. The main differences between this embodiment and the second embodiment of FIG. 6 are as follows: a washer 206 is added between the upper end of the valve body sleeve 2022 and the lower end of the elastic part 204, and the washer 206 includes a washer hole 2061 that penetrates the upper and lower surfaces of the washer 206. The addition of the washer 206 reduces the frictional resistance of the valve body 202 when it rotates relative to the elastic part 204, thereby improving the reliability of operation and the operating life of the motor-operated valve. In this embodiment, the lower end of the elastic part 204 abuts against the upper end surface of the washer 206, and the structural solutions of other parts of this embodiment are the same or similar to those of the second embodiment.

[0055] FIG. 8 is a structural diagram of a valve disc rotor unit according to a fourth embodiment of the present invention. The main differences between this embodiment and the third embodiment of FIG. 7 are as follows: the position of the washer 206 has changed; the washer 206 is located between the valve shaft abutment portion 20152 and the valve body abutment portion 202b; the washer 206 also has a washer hole portion 2061; the valve body abutment portion 202b abuts against the washer 206; and the lower end of the elastic part 204 abuts against the valve body 202. Adding the washer 206 reduces the frictional resistance of the valve body 202 when it rotates relative to the valve shaft 2011, thereby improving the reliability of operation and the operating life of the motor-operated valve. The structural solutions of other parts in this embodiment are the same or similar to those in the third embodiment.

[0056] In this embodiment, the "contact" described in the present invention includes direct contact between two members, and contact between two members by another member.

[0057] FIG. 9 is a structural diagram of a valve disc rotor unit according to a fifth embodiment of the present invention. The main difference between this embodiment and the valve disc rotor unit 20 of the first embodiment shown in Figs. 3a and 3b is that the structure of the bush 2012 is slightly different. The bush 2012 in this embodiment covers the upper part of the valve shaft 2011 and is fixedly connected to the valve shaft 2011.

[0058] The bush 2012 in this embodiment further includes a bush extension portion 20122 formed by extending downward along the circumferential outer edge, and the bush 2012 in this embodiment has a roughly enclosure-like shape, and the bush extension portion 20122 is fitted and fixed to the outer circumferential outside of the valve shaft 2011. The structural solution of other parts in this embodiment is the same or similar to that in the first embodiment, and in this embodiment, the bush 2012 is not located within the valve stem inner wall portion 2015.

[0059] FIG. 10 is a structural diagram of a valve disc rotor unit according to a sixth embodiment of the present invention. The main differences between this embodiment and the first embodiment of FIGS. 3a and 3b are as follows: a gasket 207 is added between the upper end of the valve body 202 and the lower end of the elastic part 204. Adding the gasket 207 reduces the frictional resistance of the valve body 202 when it rotates relative to the elastic part 204, thereby reducing the situation in which the valve body 202 rotates along with the valve stem unit 201. This reduces the friction between the valve body head 202a and the valve port 10a, and the wear between the valve port 10a and the valve body head 202a, thereby improving the reliability of operation and the operating life of the motor-operated valve. In this embodiment, the lower end of the elastic part 204 is abutted against the gasket 207, and the structural solutions of other parts of this embodiment are the same or similar to those of the first embodiment.

[0060] FIG. 11 is a structural diagram of a rotor 203 member according to a seventh embodiment of the present invention.

[0061] 3a and 3b, in this embodiment, the structure of the valve stem unit 201 is re-divided and adjusted based on the first embodiment. In this embodiment, the stem unit 201 includes a stem body 2013 and a tubular part 2014. The stem body 2013 has a through hole that passes through from top to bottom, and is provided with a male thread portion 201a. The valve shaft main body portion 2013 is fixed and connected to a tubular part 2014, and the approximately inner wall portion of this valve shaft main body portion 2013 after being fixed and connected to the tubular part 2014 forms a valve shaft inner wall portion 2015. In this embodiment, a portion of the valve shaft main body 2013 is located within the through hole of the tubular part 2014, but of course, a configuration in which the valve shaft main body 2013 does not enter the through hole of the tubular part 2014 and is fixed to the lower end of the tubular part 2014 may also be adopted. The tubular part 2014 has a roughly hollow cylindrical shape, with a tubular part abutment portion 20141 provided roughly at the upper part thereof, and a tubular part through hole portion 201411 provided roughly at the middle position of the tubular part abutment portion 20141, with the cross-section of the stem unit 201 being a plane in which the tubular part through hole portion 201411 is located outside the orthogonal projection of the push rod main body portion 2051 along said plane, and is located within the orthogonal projection of the push rod abutment portion 2052 along said plane. In this embodiment, the tubular part through hole portion 201411, the outer edge of the push rod main body portion 2051, and the outer edge of the push rod abutment portion 2052 are all circular, and the diameter of the tubular part through hole portion 201411 is larger than the diameter of the push rod main body portion 2051 and smaller than the diameter of the push rod abutment portion 2052.

[0062] The valve element contact portion 202 b is capable of contacting the upper end surface of the valve shaft main body portion 2013 . In this case, the upper end surface of the valve shaft main body 2013 forms the valve shaft abutment portion 20152, the side hole wall of the valve shaft unit 201 located above the valve shaft abutment portion 20152 forms the first valve shaft inner wall portion 20151, and the side hole wall located below the valve shaft abutment portion 20152 forms the second valve shaft inner wall portion 20152. The elastic part 204 is accommodated within a space limited by the tubular part 2014 and the valve shaft main body portion 2013, and the tubular part abutment portion 20141 includes abutment portion 20b since it is capable of abutting against the push rod abutment portion 2052, and the push rod main body portion 2051 of the push rod 205 protrudes upward from the tubular part through hole portion 201411 and is capable of abutting against the load portion 20d, so that the tubular part through hole portion 201411 includes a passage portion 20c.

[0063] A method may be adopted in which the member is processed and molded integrally with the cylindrical part 2014, or a method may be adopted in which two or more members are fixedly connected.

[0064] Compared with the first embodiment of Figures 3a and 3b, in this embodiment, the structure of the valve stem unit 201 is re-divided and adjusted based on the first embodiment, and after assembly, the functions of the geometrically corresponding parts are the same. The structural solutions of other parts in this embodiment are the same or similar to those in the first embodiment.

[0065] FIG. 12 is a partial structural view of a valve disc rotor unit according to an eighth embodiment of the present invention.

[0066] The differences between this embodiment and the first embodiment of FIGS. 3a and 3b are as follows: an upper washer 209 is added below the bushing 2012, and the upper washer is provided with an upper washer hole 2091. The upper washer hole 2091 penetrates the upper and lower surfaces of the upper washer 209, and the upper end surface of the upper washer 209 abuts against the bushing 2012, and its lower end abuts against the push rod abutment portion 2052. The push rod main body portion 2051 protrudes from the bushing hole 20121, and in this embodiment, the bushing hole 20121 includes a passage portion 20c, and the upper washer 209 abuts against the push rod abutment portion 2052.

[0067] The above is merely a different engagement relationship formed by adding an upper washer 209 having a different structure to the valve stem unit 201, and the overall concept does not depart from the scope of this patent. The abutment according to the present invention includes direct abutment and indirect abutment.

[0068] In this embodiment, some parts of the motor-operated valve may be modified by normal division, alignment, etc., but after assembly, the functions of the geometrically corresponding parts are basically the same and still belong to the concept of the present invention.

[0069] In the above embodiment, a form is adopted in which the push rod 205 can abut against the housing 30. In this case, the housing 30 includes a load portion 20d. Of course, a housing connection part may be welded to the housing 30, and the push rod 205 may abut against the housing connection part. In this case, the member that abuts against the push rod 205 is the load portion 20d. That is, the load portion 20 d in the present invention is not limited to the housing 30 , but is a member that can come into contact with the push rod 205 .

[0070] Based on the above embodiment, using the core structure of the present invention, some adaptive modifications can be made to add anti-friction washers or gaskets, all of which should fall within the protection scope of the present invention patent claims.

[0071] FIG. 13 is a cross-sectional view of a valve seat unit according to a ninth embodiment of the present invention.

[0072] Compared to the first embodiment in Figures 1 and 2, in this embodiment, the structure of the valve seat unit 10 is modified, and in this embodiment, the blocking portion 1024 has an approximately protrusion structure rather than a ring structure, and when the first connecting pipe portion 103 is inserted into the side wall connecting hole portion 10111 to a predetermined extent, the protrusion-shaped blocking portion 1024 can abut against the first connecting pipe portion 103.

[0073] Here, the blocking portion 1024 and the second valve seat main body portion 102a may be processed as separate bodies and then fixed and connected, or may be directly processed and molded as a single body.

[0074] In addition, the connection manner between the first valve seat member 101 and the second valve seat member 102 in this embodiment is also modified to a certain extent. Specifically, the second valve seat member 102 provided in this embodiment includes a valve seat connection part 1025 . The valve seat connection portion 1025 includes a valve seat bottom wall portion 10251 and a valve seat peripheral portion 10252. The valve seat peripheral portion 10252 has a structure that is generally formed extending axially along the axial outer edge of the valve seat bottom wall portion 10251 and is approximately annular in shape. The lower end opening of the side wall portion 1011 is located within the valve seat peripheral portion 10252.

[0075] The side wall portion 1011 provided in this embodiment further includes a second step portion 10113 . The second step portion 10113 has a generally inverted annular stepped shape, is located at the lower end of the side wall portion 10111 , and includes a second horizontal step portion 101131 and a second vertical step portion 101132 . Furthermore, this second step horizontal portion 101131 is a portion of the second step portion 10113 that is closer to the horizontal, and the second step vertical portion 101132 is a portion of the second step portion 10113 that is closer to the vertical, and in this embodiment, the second step horizontal portion 101131 is arranged horizontally, and the second step vertical portion 101132 is arranged vertically.

[0076] When connecting the first valve seat member 101 and the second valve seat member 102 , first, the lower end portion of the second stepped vertical portion 101132 is inserted into the valve seat peripheral portion 10252 until it abuts against the valve seat bottom wall portion 10251 . In this case, a predetermined distance of 0 or more is provided between the upper end of the valve seat peripheral portion 10252 and the second step horizontal portion 101131.

[0077] With the above arrangement, the connection between the first valve seat member 101 and the second valve seat member 102 is ensured.

[0078] 14 to 17, the electric valve in this embodiment includes a valve seat unit 10 and a nut unit 40, the valve seat unit 10 includes a first valve seat member 101 and a second valve seat member 102, and the first valve seat member 101 includes a side wall portion 1011 (which may be defined as an outer wall portion 1011), a top wall portion 1012 and an inner wall portion 1013. The top wall portion 1012 has a ring-shaped structure, the outer wall portion 1011 extends downward along the outer periphery of the top wall portion 1012, and the inner wall portion 1013 extends downward along the axial direction of the inner periphery of the top wall portion 1012 and includes an engagement hole portion 10131, and the outer wall portion 1011 is fixedly connected to the second valve seat member 102. The nut unit 40 includes a nut body portion 401, which includes an outer edge segment 4011 that engages with the engagement hole portion 10131, and the valve seat unit 10 and the nut unit 40 are fixedly connected.

[0079] The differences from the first embodiment are as follows: an inner wall portion 1013 is added to the first valve seat member 101 of this embodiment, and the engagement hole portion that engages with the nut main body portion 401 is formed from the inner wall portion 1013, i.e., the engagement hole portion 10131 of Figure 15 is formed, and the other structures are similar to the above embodiment.

[0080] The first valve seat member 101 of this embodiment includes an outer wall portion 1011 , a top wall portion 1012 and an inner wall portion 1013 . The top wall portion 1012 has a generally annular structure (i.e., the interior is hollow), the outer wall portion 1011 has a structure formed by extending downward along the outer periphery of the top wall portion 1012, the inner wall portion 1013 has a structure formed by extending downward along the inner periphery of the top wall portion 1012, the outer wall portion 1011 and the inner wall portion 1013 have a generally hollow cylindrical shape, and the second valve seat member 102 is located at the lower end of the first valve seat member 101. In this embodiment, the top wall 1012, the outer wall 1011 and the inner wall 1013 are integrally formed and may be manufactured by a process such as, for example, sheet drawing or bar forging. The lower end opening side of the outer wall portion 1011 is fixedly connected to the second valve seat member 102.

[0081] The nut body 401 and the inner wall 1013 can be fitted together using an interference fit, an intermediate fit, or a clearance fit. In this embodiment, the nut body 401 and the inner wall 1013 are fitted using an interference fit method, and the nut body 401 and the engagement hole 10131 are fitted using a clearance fit. In this case, it is appropriate to control the clearance on one side between the outer edge segment 4011 of the nut body 401 and the inner wall 1013 to within 0.15 mm.

[0082] In this embodiment, the lower end of the inner wall portion 1013 is lower than the highest point of the first connecting pipe portion 103. By arranging it in this manner, when the fluid flows from the first connecting pipe portion 103 into the valve chamber 10b, the impact of the fluid on the valve body 202 is reduced, and the situation in which the valve body 202 is skewed relative to the axis of the valve orifice portion 10a is reduced, thereby extending the life of the motor-operated valve.

[0083] In this embodiment, the motor-operated valve is described as a type that can completely block the flow rate, however, as will be understood by those skilled in the art, the motor-operated valve may also be structured in a way that cannot completely block the flow rate (i.e., when moved to a position closest to the valve orifice, the valve body 202 is not abutted against the valve orifice 10a).

[0084] In addition, based on the above embodiments, components such as the valve body 202, the valve stem unit 201, etc. may be assembled separately or mechanically divided at different positions without essentially changing the functions of the geometrically corresponding parts, and these adaptive modifications and combinations also fall within the scope of protection of the claims of the present invention.

[0085] Here, directional nouns such as up, down, left, and right referred to in this embodiment are all introduced for the purpose of description based on the drawings in the specification, and ordinal terms such as "first" and "second" in the names of components are also introduced for the purpose of description and are not limitations on the order of the components.

[0086] The above is a detailed introduction of the motor-operated valve provided by the present invention. The present specification uses specific examples to describe the principles and embodiments of the present invention, and the description of the above examples is merely for understanding the central idea of ​​the present invention. Those skilled in the art may make some improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. [Explanation of symbols]

[0087] 10 ···Valve seat unit; 101 First valve seat member; 1011...Side wall, outer wall; 10111 Side wall connection hole; 10112 ···First step section; 101121 ···First step side; 101122 ···First step vertical part; 10113 ···Second step section; 101131 ···Second step side; 101132 ···Second step vertical part; 1012...top wall; 10131 Engagement hole portion; 1013 Inner wall section; 1014 Balance hole; 102 --second valve seat member; 1021 Insertion part; 1022 ···Restriction section; 1023 ···Engagement connection; 1024 ···Cutting section; 1025 ···Valve seat connection; 102a: second valve seat body portion; 103...first joint pipe section; 104...Second joint pipe section; 10a: Valve orifice; 10b...valve chamber; 10d: First entrance / exit; 10e: Second entrance / exit; 20 ···Valve body rotor unit; 201 ···Valve stem unit; 2011 ···Valve stem; 2012 ···Bush; 20121 ···Bush hole; 20122 ···Bush extension; 2013 ···Valve stem body; 2014 ···Cylindrical parts; 20141 ···Cylindrical part abutment portion; 201411 ···Through hole of cylindrical part; 2015...Inner wall of valve stem; 20151...Inner wall of the first valve shaft; 20152...Valve shaft contact part; 20153...Second valve stem inner wall; 2016 ···Outer edge; 20161 ···First outer edge; 20162 ···Second outer edge; 201a ··· Male thread portion; 201b ··· Movable stopper part; 201c Rotor fixing part; 202 ···Valve body; 2021 ···Valve body; 2022 ···Valve body sleeve; 20221 ···Valve sleeve hole portion; 202a ···Valve body head; 202b...Valve body contact part; 203 ···Rotor; 204 ···Elastic parts; 205...Push rod; 2051...Push rod body; 2052...Push rod contact part; 206 ···Washer; 2061 ···Washer hole part; 207 ···Gasket; 209 ···Upper washer; 2091 ···Upper washer hole; 20b...Abutment part; 20c...Aisle section; 20d...load section; 30 ···Housing; 40 ···Nut unit; 401 ···Nut body; 402 ···Nut connection; 40a: Fixed stopper part; 40b ··· Female thread portion; 50 ···Coil

Claims

1. A motor-operated valve, The valve seat unit (10) and the nut unit (40) are included. The valve seat unit (10) includes a first valve seat member (101) and a second valve seat member (102), The first valve seat member (101) includes a side wall portion (1011) and a top wall portion (1012), The top wall portion (1012) extends from the side wall portion (1011) toward the center of the motor-operated valve, The side wall portion (1011) is fixedly connected to the second valve seat member (102); The top wall portion (1012) includes an engagement hole portion (10131), The engagement hole portion (10131) penetrates the top wall portion (1012), The nut unit (40) includes a nut body portion (401), The nut body (401) includes an outer edge segment (4011), The outer edge segment (4011) is drilled into and engaged with the engagement hole portion (10131), The nut unit (40) is fixedly connected to the top wall portion (1012), The nut unit (40) includes a nut body portion (401) and a nut connection portion (402), The nut body portion (401) is injection molded using the nut connection portion (402) as an insert, The motor-operated valve, characterized in that the nut connection portion (402) is fixedly connected to the top wall portion (1012).

2. The motor-operated valve according to claim 1, characterized in that the outer edge segment (4011) and the engagement hole portion (10131) adopt a tight press fit or an intermediate fit.

3. The outer edge segment and the engagement hole portion (10131) are fitted with a clearance, The motor-operated valve according to claim 1, characterized in that a gap on one side between the outer edge segment (4011) and the engagement hole portion (10131) is 0.15 mm or less.

4. At least a portion of the lower surface of the nut connection portion (402) is flat, At least a portion of the upper surface of the top wall portion (1012) is flat, The motor-operated valve according to claim 1, characterized in that a planar portion of the lower surface of the nut connection portion (402) and a planar portion of the upper surface of the top wall portion (1012) are engaged and fixedly connected.

5. The top wall portion (1012) includes a balance hole portion (1014), 3. The motor-operated valve according to claim 2, wherein the balance hole (1014) penetrates the top wall (1012).

6. The electric valve as described in claim 5, characterized in that the balance hole portion (1014) and the engagement hole portion (10131) do not overlap, or a portion of the balance hole portion (1014) and a portion of the engagement hole portion (10131) overlap.

7. Further comprising a housing (30), The side wall portion (1011) includes a step portion (10112), The step portion (10112) has an annular step shape and includes a horizontal step portion (101121) and a vertical step portion (101122); The housing (30) is fitted onto the stepped vertical portion (101122), There is an overlapping area between the orthogonal projection of the housing (30) along the plane in which the cross section of the motor-operated valve is located and the orthogonal projection of the step horizontal portion (101121) along the plane in which the cross section of the motor-operated valve is located, 2. The motor-operated valve according to claim 1, characterized in that the housing (30) is fixedly connected to the valve seat unit (10).

8. The opening side of the housing (30) is horizontal, The step horizontal portion (101121) is horizontal, The motor-operated valve according to claim 7, characterized in that the housing (30) is engaged with the stepped cross portion (101121) and fixedly connected to the valve seat unit (10).

9. The second valve seat member (102) includes an insert portion (1021) and a restrictor portion (1022); The insertion portion (1021) is inserted from an opening in the side wall portion (1011), There is an overlapping area between the orthogonal projection of the insertion portion (1021) along the plane on which the longitudinal section of the motor-operated valve is located and the orthogonal projection of the side wall portion (1011) along the plane on which the longitudinal section of the motor-operated valve is located, The motor-operated valve according to claim 1, characterized in that there is an overlapping area between the orthogonal projection of the side wall portion (1011) along the plane in which the cross-section of the motor-operated valve is located and the orthogonal projection of the restriction portion (1022) along the plane in which the cross-section of the motor-operated valve is located.

10. The valve seat unit (10) further includes a first connecting pipe portion (103), The side wall portion (1011) further includes a side wall connection hole portion (10111), The first connecting pipe portion (103) is inserted into the side wall connecting hole portion (10111) and fixedly connected to the first valve seat member (101), The second valve seat member (102) includes a blocking portion (1024), The direction in which the first connecting pipe portion (103) is inserted into the side wall connecting hole portion (10111) is an insertion direction X, The motor-operated valve according to any one of claims 1 to 9, characterized in that there is a plane Y perpendicular to the insertion direction X, and there is an overlapping area between the orthogonal projection of the blocking portion (1024) along the plane Y and the orthogonal projection of the first connecting pipe portion (103) along the plane Y.

11. The motor-operated valve according to claim 10, characterized in that the side wall portion (1011) and the top wall portion (1012) are molded as a single piece.

12. The motor-operated valve according to claim 10, characterized in that the blocking portion (1024) has an annular or protruding structure.

13. The second valve seat member (102) includes a second valve seat body portion (102a), The motor-operated valve according to claim 12, characterized in that the blocking portion (1024) and the second valve seat main body portion (102a) are fixedly connected or integrally processed and molded.

14. the second valve seat member (102) includes a valve seat connection portion (1025); The valve seat connection portion (1025) includes a valve seat bottom wall portion (10251) and a valve seat peripheral portion (10252); The valve seat periphery (10252) extends axially along the circumferential outer edge of the valve seat bottom wall (10251); The motor-operated valve according to any one of claims 1 to 9, characterized in that an open end of the side wall portion (1011) is located within the valve seat peripheral portion (10252).

15. The side wall portion (1011) includes a second step portion (10113), The second step portion (10113) has an inverted annular step shape, A second step horizontal portion (101131) and a second step vertical portion (101132), The lower end of the second step vertical portion (101132) abuts against the valve seat bottom wall portion (10251), The motor-operated valve according to claim 14, characterized in that a predetermined distance is provided between an upper end of the valve seat peripheral portion (10252) and the second step horizontal portion (101131).

16. The first valve seat member (101) further includes an inner wall portion (1013); The top wall portion (1012) has an annular structure, The side wall portion (1011) extends downward along the outer periphery of the top wall portion (1012); The inner wall portion (1013) extends downward along the axial direction of the inner circumference of the top wall portion (1012); The inner wall portion (1013) includes the engagement hole portion (10131), The side wall portion (1011) is fixedly connected to the second valve seat member (102); The nut unit (40) includes a nut body portion (401), The nut body portion (401) includes an outer edge segment (4011) that engages with the engagement hole portion (10131), The motor-operated valve according to any one of claims 1 to 9, characterized in that the valve seat unit (10) and the nut unit (40) are fixedly connected to each other.

17. The motor-operated valve according to claim 16, characterized in that a lower end of the inner wall portion (1013) is lower than the highest point of the first connecting pipe portion (103).

18. The motor-operated valve according to claim 16, characterized in that the nut connection portion (402) is fixed to the top wall portion (1012) by welding.

Images